WO2020134785A1 - Laser light source and laser projection device - Google Patents
Laser light source and laser projection device Download PDFInfo
- Publication number
- WO2020134785A1 WO2020134785A1 PCT/CN2019/120637 CN2019120637W WO2020134785A1 WO 2020134785 A1 WO2020134785 A1 WO 2020134785A1 CN 2019120637 W CN2019120637 W CN 2019120637W WO 2020134785 A1 WO2020134785 A1 WO 2020134785A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- laser
- fluorescent
- light source
- blue
- Prior art date
Links
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/10—Beam splitting or combining systems
- G02B27/14—Beam splitting or combining systems operating by reflection only
- G02B27/141—Beam splitting or combining systems operating by reflection only using dichroic mirrors
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
Definitions
- the present application relates to the field of laser projection display, in particular to a laser light source and a laser projector.
- the laser light source is a light source with high brightness, strong directivity, and a monochromatic coherent light beam. Due to the many advantages of the laser light source, it has been gradually used in the field of projection display in recent years.
- the structure of the current laser light source usually includes at least: a laser, a beam shaping device, a fluorescent wheel, a color filter wheel and a light rod.
- the working process of the laser light source includes: the laser emits laser light, and the laser beam undergoes a diameter reduction process (that is, the laser spot diameter is compressed) by a beam shaping device to obtain a diameter-reduced laser, and the diameter-reduced laser is irradiated on the fluorescent wheel On the top, a part is transmitted from the fluorescent wheel, and the other part excites the phosphor on the fluorescent wheel to output at least one color of fluorescence. The at least one color of fluorescence is filtered by the color wheel to obtain at least one color of light. The transmitted The laser and the light of at least one color are processed by the light rod to achieve the illumination function of the laser light source.
- the energy density of the laser irradiated on the phosphor is large, and after the energy density of the laser that excites the phosphor reaches a certain density, the excitation efficiency of the laser that excites the phosphor to the phosphor It has a certain influence, which makes the actual excitation efficiency of the phosphor negatively correlated with the energy density of the laser, that is, when the energy density of the laser that excites the phosphor is larger, the actually excited fluorescence is less. Therefore, the structure of the current laser light source is likely to cause the actual excitation efficiency of the phosphor to be low.
- the embodiments of the present application provide a laser light source and a laser projection device, which can solve the problem of low excitation efficiency of phosphors.
- the technical solutions are as follows:
- a laser light source comprising:
- the blue laser is used to emit blue laser
- the light collecting device is used to refract the received blue laser light to obtain a non-collimated blue laser light, and then transmit it to the fluorescent device;
- the fluorescent device is a tubular structure, at least part of the inner surface of the fluorescent device is a fluorescent area, the fluorescent area is used to emit fluorescence under the excitation of a blue laser, and the tube wall of the fluorescent device is used for reflection and reception The blue laser and the fluorescence;
- the fluorescent device is used to output different colors of light.
- a laser projector in a second aspect, includes:
- An optical machine, a projection lens, and a laser light source is the laser light source described in the first aspect
- the optical machine is used to modulate the light beam to generate an image light beam when irradiated by the light beam emitted from the laser light source;
- the projection lens is used to project the image beam onto the projection screen.
- the fluorescent device in the laser light source has a reflection function, the effective light output of the fluorescent device is ensured, and the light collection efficiency of the laser light source for blue laser and fluorescence is improved. Further, because the condensing device refracts the blue laser to obtain a non-collimated blue laser, and the energy density of the non-collimated blue laser irradiated on the phosphor is smaller than that of the diameter-shrinked blue laser The energy density on the phosphor is small.
- the laser light source also improves the luminous efficiency of the laser light source while ensuring the collection efficiency of the blue laser light and the fluorescent light.
- FIG. 1 is a schematic diagram of an implementation environment involved in some embodiments of the present application.
- FIG. 2 is a schematic structural diagram of a laser light source in the related art.
- Fig. 3 is a schematic diagram of the divergence angle.
- FIG. 4 is a schematic structural diagram of a laser light source provided by an exemplary embodiment of the present application.
- FIG. 5 is a schematic cross-sectional view of a fluorescent device provided by an exemplary embodiment of the present application.
- FIG. 6 is a schematic structural diagram of a laser light source provided by an exemplary embodiment of the present application.
- FIG. 7 is a schematic structural diagram of a laser light source provided by an exemplary embodiment of the present application.
- FIG. 1 illustrates a schematic diagram of an implementation environment involved in some embodiments of the present application.
- the implementation environment may include: a laser light source 10, an optical machine 20, and a projection lens 30, and the laser light source 10, the optical machine 20, and the projection lens 30 are sequentially arranged along the beam transmission direction.
- the laser light source 10 is used to emit a light beam
- the optical machine 20 is used to modulate the light beam to obtain an image light beam when the light beam emitted from the laser light source 10 is irradiated
- the projection lens 30 is used to project the image light beam onto the projection screen 40.
- the above-mentioned laser light source 10, optical machine 20 and projection lens 30 may be applied to the laser projector 1.
- the laser light source may include: at least one laser, and the laser light source is used to emit laser light of at least one color.
- the laser light source may be a monochromatic laser light source (that is, it includes a laser and the laser emits laser light of one color), or it may be a multicolor laser light source (that is, it includes multiple lasers and the laser emits laser lights of multiple colors in total) ).
- the laser light source is a monochromatic laser light source
- one laser included in the laser light source may be a blue laser, a red laser, or a green laser
- the plurality of lasers may include blue Color laser, red laser and/or green laser.
- the laser light source 10 includes at least a fluorescent wheel 110, a color filter 120, a blue laser 130, a light combining member 140, a beam shaping member 150, and a light collecting member 160.
- the blue laser 130, the beam shaping member 150, the light combining member 140, the fluorescent wheel 110, the color filter 120, and the light collecting member 160 are arranged in this order along the transmission direction of the blue laser light.
- the blue laser 130 is used to emit blue laser light.
- the beam shaping member 150 is used to reduce the diameter of the blue laser emitted by the blue laser 130 to obtain a collimated blue laser beam after the diameter reduction, and transmit the collimated blue laser beam to the light combining member 140.
- the light combining component 140 is used to transmit the received blue laser to the fluorescent wheel 110, and the light combining component 140 is also used to transmit the blue component transmitted by the fluorescent wheel 110 to the color filter 120, and the blue component is irradiated by the blue laser
- the light combining part 140 is also used to transmit the fluorescent light emitted by the fluorescent wheel 110 to the color filter wheel 120, and the fluorescent light is generated by the blue laser light irradiating the fluorescent area.
- the color filter 120 is used to output red light, blue light, and green light in sequence when the light is rotated. The red light and green light are filtered by the color filter 120, and the blue light is transmitted by the color filter 120. Laser get.
- the light collecting part 160 is used to perform uniform light processing on red light, blue light and green light.
- the light emitting process of the laser light source is as follows: the blue laser light emitted by the blue laser 130 is shaped by the beam shaping device 150 to the blue laser beam, then emitted to the light combining part 140, and then transmitted to the fluorescent wheel 110; Rotation, when the blue laser irradiates the transmission area on the fluorescent wheel 110, the blue laser is transmitted from the fluorescent wheel 110 and passes through the blue laser relay circuit optical path (referring to the blue laser transmitted from the fluorescent wheel 110 to the The light path of the light combining part 140) passes through the light combining part 140 again, and enters the light collecting part 160 after filtering the color wheel 120; when the blue laser irradiates the fluorescent area on the fluorescent wheel 110, the The phosphor emits at least one color of fluorescence (for example, yellow fluorescence and/or green fluorescence in FIG.
- the excited fluorescence is reversely transmitted, reflected by the light combining part 140 to the color wheel 120, and then enters the light collecting part 160 .
- the three colors of light (referred to as tri-color light for short) generate an image beam by modulation of the optical machine 20, and the image beam is transmitted to the projection lens 30 to finally realize the image output of the tri-color light.
- the blue laser undergoes a diameter reduction process, the energy density irradiated on the phosphor is relatively large, and after the energy density of the laser that excites the phosphor reaches a certain density, the laser that excites the phosphor excites the phosphor
- the efficiency has a certain effect, which makes the actual excitation efficiency of the phosphor inversely related to the energy density of the laser, that is, when the energy density of the laser that excites the phosphor is larger, the actually excited fluorescence is less. Therefore, the structure of the current laser light source is likely to cause the actual excitation efficiency of the phosphor to be low.
- the beam divergence angle is the derivative of the beam radius with respect to the axial position of the far field. As shown in FIG. 3, the divergence angle is the angle between the two points p1 and p2 on the beam that are symmetric with respect to the optical axis L2 and the focal point, which is the focal point of the straight line L2 where the beam optical axis is located and the beam waist diameter L1.
- Half divergence angle 1/2 ⁇ half of the beam divergence angle. As shown in FIG. 3, the half divergence angle is the angle between the point p1 or p2 on the beam that is symmetrical with respect to the optical axis L2 and the focal line, which is the focal point of the straight line L2 where the beam optical axis lies and the beam waist diameter L1.
- Luminous flux The total amount of light emitted by the luminous body per second, the unit is lm (lumens).
- Excitation efficiency the sum of the light emitted by the luminous body when it is excited by the energy per watt, the unit is lm/W.
- Collimated light The rays in the beam are parallel to each other.
- Non-collimated light that is, divergent light, that is, the light in the beam is not parallel.
- Optical expansion matching parameters of light source and lighting system.
- FIG. 4 is a schematic structural diagram of a laser light source according to an embodiment of the present application. It is assumed that one laser in the laser light source is a blue laser. Then the laser light source 10 includes:
- the blue laser 101, the condensing device 102, and the fluorescent device 103 are located between the blue laser 101 and the fluorescent device 103.
- the blue laser 101 is used to emit blue laser light.
- the blue laser is usually a collimated blue laser.
- the condensing device 102 is used to refract the received blue laser light to obtain a non-collimated blue laser light, and then transmit it to the fluorescent device 103.
- the light-concentrating device 102 may be a lens with a refractive function, or a lens system with a refractive function, which is composed of multiple lenses. In practical applications, the light-concentrating structure 102 may be a convex lens.
- the non-collimated blue laser refers to a blue laser with a half divergence angle ⁇ , 0° ⁇ 90°.
- the fluorescent device 103 has a tubular structure, and at least part of the inner surface of the fluorescent device 103 is a fluorescent region (the black region on the inner surface of the fluorescent device 103 in FIG. 4 represents the fluorescent region).
- the fluorescent region is used under the excitation of a blue laser Fluorescence is emitted, and the wall of the fluorescent device 103 is used to reflect the received blue laser light and fluorescence.
- the fluorescent device 103 is used to output different colors of light.
- the light of different colors may be light required by three primary colors.
- the different colors of light may include yellow light, blue light, and green light, or red light, green light, and blue light, or red light, yellow light, and blue light, or yellow light, green light, red light, and blue light.
- the shape of the fluorescent area may be a ring shape or a bar shape, which is not limited in the implementation of this application.
- the surface of the fluorescent region is provided with phosphors of different colors, so that when the fluorescent region is irradiated by the blue laser, it can be excited by Fluorescent powder of corresponding color to emit light of the color corresponding to the fluorescent powder. Therefore, the fluorescent area can be divided into a plurality of sub-fluorescence areas of corresponding colors according to the color of the set phosphor.
- the color of the phosphor may be green, yellow, red, and/or orange
- the plurality of sub-fluorescence regions may include: a green sub-fluorescence region, a yellow sub-fluorescence region, and a red sub-fluorescence region, which correspond to the aforementioned colors one-to-one And/or orange sub-fluorescence zone.
- the light emitting process of the laser light source 10 is as follows: the blue laser 101 emits blue laser light, and the blue laser light is refracted by the condensing device 102 to become a non-collimated blue laser light, and the non-collimated blue laser light enters the fluorescent device 103 Afterwards, the tube wall of the fluorescent device 103 is irradiated. Wherein, a part of the blue laser light irradiated to the fluorescent area on the inner surface of the tube wall excites the phosphor on the fluorescent area to output at least one color of fluorescence (yellow fluorescence and/or green fluorescence as shown in FIG. 4).
- Fluorescence of one color and a part of blue laser light irradiated to other areas of the tube wall that is, areas other than the fluorescent area
- multiple diffuse reflections through the wall of the tube light incident at a second angle of incidence to the fluorescent area
- the reflection of the phosphor on the light is diffuse reflection
- output after reflection and a part of the blue laser light that is not irradiated to the inner surface of the fluorescent device 103 is directly output to realize the illumination function of the laser light source.
- the fluorescent device since the fluorescent device has a reflection function, the effective light output of the fluorescent device is ensured, and the light-receiving efficiency of the blue light and fluorescent light by the laser light source is improved. Further, because the condensing device refracts the blue laser to obtain a non-collimated blue laser, the energy density of the non-collimated blue laser irradiated onto the phosphor is compared to that of the diameter-shrinked blue laser The energy density irradiated onto the phosphor is small.
- the laser light source also improves the luminous efficiency of the laser light source while ensuring the collection efficiency of the blue laser light and the fluorescent light.
- a part of the area in the inner surface of the fluorescent device 103 is a fluorescent area, and the fluorescent device 103 further has a reflective area.
- the orthographic projection of the reflective area on the inner surface of the fluorescent device covers the fluorescent area, and the reflective area covers the fluorescent area Area.
- the reflection area is used to reflect the light (blue laser and blue laser excited fluorescence) transmitted in the fluorescent device.
- the reflective area includes a first reflective area and a second reflective area.
- the orthographic projection of the first reflecting area on the inner surface of the fluorescent device does not overlap with the fluorescent area.
- the first reflecting area is usually farther away from the entrance of the fluorescent device than the fluorescent area (the entrance of the fluorescent device is close to the fluorescent device
- the opening at one end of the blue laser) is arranged.
- the first reflection area reflects the light transmitted in the fluorescent device multiple times (for example, total reflection of the light), so that the brightness of the light is more uniform, so as to achieve the homogenization of the light transmitted in the fluorescent device 103.
- the orthographic projection of the second reflecting area on the inner surface of the fluorescent device overlaps with the fluorescent area, such as the outer surface area and the tube wall area, etc.
- the second reflecting area may be a reflective film coated on the inner surface of the fluorescent device Realization, correspondingly, the fluorescent zone can be realized by a fluorescent powder coated on the reflective film.
- the second reflection area reflects the light transmitted in the fluorescent device multiple times to avoid the loss of light in the fluorescent device, thereby ensuring the effective light emission of the fluorescent device, improving the light collection efficiency of the laser light source, and at the same time,
- the secondary reflection also makes the light more uniform. Therefore, due to the reflection area in the fluorescent device, the brightness of the output light is more uniform while ensuring the effective light emission of the fluorescent device, so that the laser light source can realize the uniform light treatment of the light without a light rod.
- the fluorescent zone is usually located at the end of the fluorescent device 103 close to the blue laser 101, that is, at the end of the entrance of the fluorescent device. In this way, the fluorescent light emitted from the fluorescent area can be reflected by the reflection area more times, so that the brightness of the fluorescent light output by the fluorescent device is more uniform, and then the uniform light effect of the fluorescent device is stronger.
- the fluorescent device 103 may be a square tubular structure (that is, the cross-sectional shape of the fluorescent device is two nested rectangles, the cross-section is perpendicular to the extending direction of the fluorescent device), or a diamond-shaped tubular structure (that is, fluorescent The shape of the cross section of the device is two nested diamonds, the cross section being perpendicular to the direction of extension of the fluorescent device). Since the square tubular structure and the diamond-shaped tubular structure are axisymmetric, the difficulty of the manufacturing process is reduced.
- the tube wall of the fluorescent device 103 may be provided with a reflective film layer, for example, a highly reflective film layer with a reflectivity >90%.
- the high-reflection film layer may be a high-reflection aluminum film or a high-reflection silver film.
- the tube wall of the fluorescent device 103 may also be made of a highly reflective material.
- the laser light source 10 further includes: an angle filter 104, which is disposed at the end of the fluorescent device 103 away from the blue laser 101.
- the angle filter 104 is used to transmit light whose incident angle (that is, incident angle) is in the first angular range, and reflect light whose incident angle is in the second angular range, and the angle in the first angular range is smaller than the second angle The angle in the range.
- the union of the first angle range and the second angle range is 0-90. There is no intersection between the two, and the upper limit of the first angle range is less than the specified angle, and the lower limit of the second angle range is greater than the specified angle.
- the angle filter may be a light-transmitting device with an optical film layer.
- the optical expansion of the laser light source is a fixed value, and the aforementioned specified angle is related to the optical expansion, so when determining When the optical expansion amount is obtained, the specified angle can be calculated according to the optical expansion amount.
- the relationship between the optical expansion U and the specified angle satisfies:
- A is the area of the fluorescent device irradiated by the beam, that is, the cross-sectional area of the fluorescent device
- ⁇ is the angle between the normal of the area irradiated by the beam and the optical axis of the solid angle of the beam, that is, Is the specified angle.
- the color temperature of the light emitted from them is usually within a certain range. Therefore, it is necessary to match the optical power of different colors of light emitted from the laser light source. Because the color of the light is related to the laser and the phosphor, and because the power of the fluorescence of a certain color and the area of the coating of the phosphor of the color (that is, the sub-fluorescence region of the color), the blue laser light is irradiated to the The energy density of the sub-fluorescence zone of the color, the cross-sectional area of the fluorescent device, the optical power of the blue laser irradiated to the sub-fluorescence zone of the color, and the first incident angle of the blue laser irradiated to the sub-fluorescence zone of the color The range (that is, the range of the half divergence angle) is related.
- the first incident angle range is the angle range of the angle between the transmission direction of the blue laser and the normal direction of the surface of the opening when the blue laser passes through the fluorescent device near the opening of the end of the blue laser.
- the shape of the cross section (the cross section is perpendicular to the extending direction of the fluorescent device) is two nested rectangles, that is, a “back” shape .
- the area of the inner rectangle (corresponding to the inner surface of the fluorescent device) of the two nested rectangles is a ⁇ b square millimeter, where a is the width of the inner rectangle, the unit is mm, and b is the inner rectangle The length of the rectangle is in millimeters.
- the inner surface of the fluorescent device 103 has a fluorescent area, and is located at the end of the fluorescent device 103 near the blue laser 101.
- the fluorescent region includes: a yellow sub-fluorescent region and a green sub-fluorescent region.
- the angle range of the semi-divergence angle ⁇ of the blue laser is 0°-50°, the optical power of the blue laser is 100W, and the energy distribution is uniform, that is, The optical power of the blue laser per 1° is 1W, that is, the energy density is 1, the laser efficiency of the phosphors of each color is 300lm/W, according to the conservation of the optical expansion of the laser light source, the The maximum value of the first angle range of the incident angle of the light transmitted through the angle filter area is 10°, and it is assumed that the required color temperature of the laser light source is about 7500K.
- the maximum value of the first angle range of the incident angle of the blue laser transmitted through the angle filter area of the fluorescent device is 10°, which is the blue laser that is not used to excite the phosphor in the blue laser (i.e. blue
- the maximum half divergence angle ⁇ of the color laser is 10°
- the optical power of the blue laser emitted by the laser light source is about 20W
- the optical power is 80W
- the maximum half divergence angle ⁇ angle of the blue laser that is, the part of the blue laser used to excite the phosphor in the blue laser
- the ratio of the light power of yellow light and blue light is determined to be 2:1
- the ratio of the luminous flux of yellow light and blue light is 2:1.
- the area ratio of the sub-fluorescence zone is 2:1.
- the total area of the fluorescent area is 2ab ⁇ [(tan ⁇ -tan ⁇ )/(tan ⁇ tan ⁇ )], the area of the yellow fluorescent area is 2/3 ⁇ 2ab[(tan ⁇ -tan ⁇ )/(tan ⁇ tan ⁇ )], the green area
- the area of the fluorescent zone is 1/3 ⁇ 2ab[(tan ⁇ -tan ⁇ )/(tan ⁇ tan ⁇ )].
- the length L of the fluorescent device satisfies: L>a ⁇ [(tan ⁇ -tan ⁇ )/(tan ⁇ tan ⁇ )], and L>b ⁇ [(tan ⁇ - tan ⁇ )/(tan ⁇ tan ⁇ )].
- the fluorescence emitted from the fluorescent area of the fluorescent device is a Lambertian body
- part of the fluorescence may be output to the entrance of the fluorescent device, and then exit through the entrance of the fluorescent device, and the light reflected by the angle filter may also be emitted from the The entrance of the fluorescent device is emitted. This will cause loss of light.
- the laser light source 10 further includes: a dichroic member 105, which is disposed at an end of the fluorescent device 103 close to the blue laser 101.
- the dichroic element 105 is used to transmit blue laser light (short-wavelength light) and reflect fluorescence (long-wavelength light).
- the dichroic member 105 may be a light-transmitting device with an optical film layer, such as a color filter or a dichroic sheet. In this way, a part of the fluorescence output to the entrance of the fluorescent device and the light reflected by the angle filter are prevented from being emitted from the entrance of the fluorescent device, reducing the loss of light.
- the laser light source 10 further includes a color filter wheel 106, which is located on the side of the fluorescent device 103 away from the blue laser 101, and the color filter wheel 106 is used to output different colors of light in a sequential manner.
- the color filter 106 is used to output red light, blue light, green light, and yellow light in time sequence; or, the color filter 106 is used to output red light, green light, and blue light in time sequence.
- the color filter 106 may include a red filter region, a green filter region, and a yellow filter region At least three color filter areas (red light filter area, green light filter area, yellow light filter area and blue light filter area) in the light filter area and blue light filter area, so that the laser light source can be at the same time Only one color of light is output.
- the red light filter area is used for filtering the light of different colors output by the fluorescent device to obtain red light
- the green light filter area is used for filtering the light of different colors output by the fluorescent device to obtain green light
- the light filter area is used for filtering the light of different colors output by the fluorescent device to obtain yellow light
- the blue light filter area is used for filtering the light of different colors output by the fluorescent device to obtain blue light.
- the color filter wheel may include different filter regions.
- the different colors of light output by the color filter include red light, yellow light, green light, and blue light.
- the color filter includes red light filter area, yellow light filter area, green light filter area, and blue light Filter area; the light of different colors output by the color wheel includes red light, green light and blue light.
- the color wheel includes red light filter area, green light filter area and blue light filter area.
- the light emitting process of the laser light source 10 includes: the blue laser light emitted by the blue laser 101, which is refracted by the condensing device 102 to become a non-collimated blue laser light, and the non-collimated blue laser light enters
- the fluorescent device 103 is then irradiated onto the tube wall of the fluorescent device 103.
- a part of the blue laser light irradiated to the fluorescent area on the inner surface of the tube wall excites the phosphor on the fluorescent area to output at least one color of fluorescent light, and the partial fluorescent light output to the entrance of the fluorescent device passes through the dichroic member 105 and the fluorescent device
- the reflection of the tube wall of 103 is transmitted to the angle filter 104; the other part of the fluorescence except the part of the fluorescence output to the entrance of the fluorescent device and the part of the blue laser that is not irradiated to the fluorescent area on the inner surface of the tube wall pass through the wall of the fluorescent device 103 It is reflected and transmitted to the angle filter 104; a part of the blue laser light that is not irradiated to the inner surface of the fluorescent device 103 is directly transmitted to the angle filter 104.
- the angle filter 104 transmits and outputs light (blue laser and fluorescence) with an incident angle of the first angle, reflects light with an incident angle of the second angle to the wall of the fluorescent device 103, and passes through the wall and the filter After the light sheet 105 diffusely reflects and reflects multiple times, the light at the first angle is output through the angle filter 104. Finally, different colors of light output from the fluorescent device 103, that is, fluorescent and blue laser light, are output to the color filter 106, and after filtering, they are emitted from the laser light source to realize the illumination function of the laser light source.
- the laser light source 10 further includes a heat dissipation structure 107 that is disposed outside the tube wall of the fluorescent device 103.
- the heat dissipation structure 107 is used to dissipate the fluorescent device 103.
- the heat dissipation structure 107 may be a patch radiator connected to the outside of the tube wall or a liquid cooling radiator surrounding the outside of the tube wall. Because the heat dissipation structure is provided on the outside of the tube wall of the fluorescent device, the problem of heat generated when the blue laser in the fluorescent device excites the phosphor can be effectively solved, and the life of the laser light source can be increased.
- FIG. 7 is a schematic structural diagram of another laser light source 10 provided by an embodiment of the present application.
- FIG. 7 takes a laser light source as a two-color laser light source as an example for description.
- FIG. 7 assumes that one laser is a blue laser and the other laser is a red laser.
- the laser light source 10 further includes a red laser 108 that is used to emit red laser light.
- the laser light source 10 further includes a light combining part 109, and the light combining part 10 is used to transmit the received blue laser light and red laser light to the light collecting device 102.
- the structure and principle of the blue laser 101, the condensing device 102, the fluorescent device 103, the angle filter 104, the dichroic element 105, and the color wheel 106 in FIG. 7 can refer to the laser light source 10 shown in FIG. 4, This embodiment of the present application will not repeat them here.
- the light emitting process of the laser light source includes: blue laser light emitted by the blue laser 101 and red laser light emitted by the red laser 108.
- the laser light (which is a collective name of the red laser and the blue laser) is refracted by the condensing device 102 to become
- the non-collimated laser light enters the fluorescent device 103 and irradiates the tube wall of the fluorescent device 103.
- a part of the laser light irradiated to the fluorescent area p on the inner surface of the tube wall excites the phosphor on the fluorescent area p to output at least one color of fluorescence (such as yellow fluorescence and/or green fluorescence in FIG.
- the angle filter 104 transmits light (blue laser and fluorescence) with an incident angle of the first angle, reflects light with an incident angle of the second angle to the tube wall of the fluorescent device, passes through the tube wall and filters light After the sheet 105 is diffusely reflected and reflected multiple times, the light at the first angle is output through the angle filter 104. Finally, the different colors of light output from the fluorescent device 103, that is, fluorescence and laser light, are emitted to the color filter 106, and after filtering, they are emitted from the laser light source to realize the illumination function of the laser light source.
- the red light emitted by the laser light source includes red laser light emitted by the red laser and/or red light obtained by filtering the yellow fluorescence through the filter color wheel.
- the red laser light source in the laser light source shown in FIG. 7 may be replaced with a green laser, and the green laser is used to emit green laser light.
- the light emitting process of the laser light source is the same as the above light emitting process, which will not be repeated in the embodiments of the present application.
- the red light emitted by the laser light source is red light obtained by filtering the yellow fluorescent light through the color wheel.
- the green light emitted by the laser light source includes green laser light emitted by the green laser and/or green fluorescence light The green light obtained by the filtering treatment of the color wheel.
- An embodiment of the present application provides yet another laser light source.
- the laser light source may be a three-color laser light source, then one laser may be a blue laser, the other laser may be a red laser, and the other laser may be a green laser.
- the light emitting process of the three-color laser and the above-mentioned two-color laser is basically the same, which will not be repeated in the embodiments of the present application.
- the fluorescent device since the fluorescent device has a reflection function, the effective light output of the fluorescent device is ensured, and the light-receiving efficiency of the laser light source for blue laser and fluorescence is improved. At the same time, the reflection function So that the fluorescent device has a uniform light effect. Further, because the condensing device refracts the blue laser to obtain a non-collimated blue laser, and the energy density of the non-collimated blue laser irradiated on the phosphor is compared with that of the blue laser of the diameter reduction process The energy density irradiated on the phosphor is small.
- the laser light source ensures the light-receiving efficiency of the blue laser light and the fluorescent light, and the luminous efficiency of the laser light source.
- the laser light source can be used in a lighting system such as a flashlight. Since the laser light source can output multiple colors of light at the same time, its overall luminous efficiency is high.
- the heat dissipation structure is provided on the outside of the tube wall of the fluorescent device, the problem of heat generated when the blue laser in the fluorescent device excites the phosphor powder is effectively solved, and the life of the laser light source is increased.
- an embodiment of the present application provides a laser projector.
- the laser projector includes a laser light source 10, an optical machine 20, and a projection lens 30.
- the laser light source 10 is any of the laser light sources described above.
- the optical machine 20 is located between the laser light source 10 and the projection lens 30.
- the optical machine 20 is used to modulate the light beam to generate a video light beam when irradiated with the light beam emitted from the laser light source 10.
- the optical machine includes a light valve, and the light valve may be a digital micromirror device (English: Digital Micromirror Device, abbreviated as DMD).
- the projection lens 30 is used to project the image beam onto the projection screen 40.
- the laser projector provided by the embodiment of the present application, because the fluorescent device of the laser light source in the laser projector has a reflection function, ensures the light collection efficiency of the laser light source for the blue laser and fluorescence. Further, because the condensing device refracts the blue laser to obtain a non-collimated blue laser, and the energy density of the non-collimated blue laser irradiated on the phosphor is smaller than that of the diameter-shrinked blue laser The energy density on the phosphor is small. When the non-collimated blue laser is irradiated onto the phosphor, the impact on the excitation efficiency of the phosphor is reduced, and the actual excitation efficiency of the phosphor is improved, thereby improving the laser. The luminous efficiency of the light source. Therefore, the laser light source not only ensures the collection efficiency of the blue laser and fluorescence, but also improves the luminous efficiency of the laser light source, thereby further improving the luminous efficiency of the laser projector.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Astronomy & Astrophysics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Projection Apparatus (AREA)
Abstract
A laser light source (10) and a laser projector, the laser light source (10) comprising: a blue laser (101), a light condensing apparatus (102), and a fluorescent apparatus (103). The light condensing apparatus (102) is located between the blue laser (101) and the fluorescent apparatus (103); the blue laser (101) emits blue laser light; the light condensing apparatus (102) refracts received blue laser light to obtain non-collimated blue laser light, and then transmits same to the fluorescent apparatus (103); the fluorescent apparatus (103) is a tubular structure, at least part of a region of an inner surface of the fluorescent apparatus (103) is a fluorescent region, the fluorescent region emits fluorescent light under the excitation of the blue laser light, and a tube wall of the fluorescent apparatus (103) reflects received blue laser light and fluorescent light; and the fluorescent apparatus (103) outputs different colored lights.
Description
本申请要求于2018年12月28日提交中国专利局、申请号为201811628741.9、申请名称为“激光光源及激光投影设备”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。This application requires the priority of the Chinese patent application filed on December 28, 2018, with the application number 201811628741.9 and the application name "laser light source and laser projection equipment", the entire contents of which are incorporated by reference in this application.
本申请涉及激光投影显示领域,特别涉及一种激光光源及激光投影机。The present application relates to the field of laser projection display, in particular to a laser light source and a laser projector.
激光光源是一种光亮度高、方向性强、发出单色相干光束的光源,由于激光光源的诸多优点,近年来逐渐被应用于投影显示领域。The laser light source is a light source with high brightness, strong directivity, and a monochromatic coherent light beam. Due to the many advantages of the laser light source, it has been gradually used in the field of projection display in recent years.
目前的激光光源的结构通常至少包括:激光器、光束整形装置、荧光轮、滤色轮和光棒。该激光光源的工作过程包括:激光器发出激光,该激光通过光束整形装置进行径缩处理(也即是将激光的光斑直径压缩)得到径缩后的激光,该径缩后的激光照射在荧光轮上,一部分从荧光轮透射,另一部分激发荧光轮上的荧光粉输出至少一种颜色的荧光,该至少一种颜色的荧光通过滤色轮的过滤处理得到至少一种颜色的光,该透射的激光和该至少一种颜色的光通过光棒的匀光处理后实现激光光源的照明功能。The structure of the current laser light source usually includes at least: a laser, a beam shaping device, a fluorescent wheel, a color filter wheel and a light rod. The working process of the laser light source includes: the laser emits laser light, and the laser beam undergoes a diameter reduction process (that is, the laser spot diameter is compressed) by a beam shaping device to obtain a diameter-reduced laser, and the diameter-reduced laser is irradiated on the fluorescent wheel On the top, a part is transmitted from the fluorescent wheel, and the other part excites the phosphor on the fluorescent wheel to output at least one color of fluorescence. The at least one color of fluorescence is filtered by the color wheel to obtain at least one color of light. The transmitted The laser and the light of at least one color are processed by the light rod to achieve the illumination function of the laser light source.
但是,由于激光经过径缩处理后,其照射到荧光粉上的能量密度较大,且在激发荧光粉的激光的能量密度达到一定密度后,该激发荧光粉的激光对荧光粉的激发效率的具有一定的影响,该影响使得荧光粉的实际激发效率与该激光 的能量密度负相关,也即是当激发荧光粉的激光的能量密度越大时,实际激发出的荧光较少。因此,目前的激光光源的结构容易导致荧光粉的实际激发效率较低。However, after the laser undergoes the diameter reduction process, the energy density of the laser irradiated on the phosphor is large, and after the energy density of the laser that excites the phosphor reaches a certain density, the excitation efficiency of the laser that excites the phosphor to the phosphor It has a certain influence, which makes the actual excitation efficiency of the phosphor negatively correlated with the energy density of the laser, that is, when the energy density of the laser that excites the phosphor is larger, the actually excited fluorescence is less. Therefore, the structure of the current laser light source is likely to cause the actual excitation efficiency of the phosphor to be low.
发明内容Summary of the invention
本申请实施例提供了一种激光光源和激光投影设备,能够解决荧光粉激发效率较低的问题,采用技术方案如下:The embodiments of the present application provide a laser light source and a laser projection device, which can solve the problem of low excitation efficiency of phosphors. The technical solutions are as follows:
第一方面,提供了一种激光光源,所述激光光源包括:In a first aspect, a laser light source is provided, the laser light source comprising:
蓝色激光器、聚光装置和荧光装置,所述聚光装置位于所述蓝色激光器和所述荧光装置之间;A blue laser, a light collecting device and a fluorescent device, the light collecting device is located between the blue laser and the fluorescent device;
所述蓝色激光器用于发出蓝色激光;The blue laser is used to emit blue laser;
所述聚光装置用于将接收的蓝色激光折射得到非准直的蓝色激光后,传输至所述荧光装置;The light collecting device is used to refract the received blue laser light to obtain a non-collimated blue laser light, and then transmit it to the fluorescent device;
所述荧光装置为管状结构,所述荧光装置的内表面中至少部分区域为荧光区,所述荧光区用于在蓝色激光的激发下发出荧光,所述荧光装置的管壁用于反射接收的蓝色激光和所述荧光;The fluorescent device is a tubular structure, at least part of the inner surface of the fluorescent device is a fluorescent area, the fluorescent area is used to emit fluorescence under the excitation of a blue laser, and the tube wall of the fluorescent device is used for reflection and reception The blue laser and the fluorescence;
所述荧光装置用于输出不同颜色的光。The fluorescent device is used to output different colors of light.
第二方面,提供了一种激光投影机,所述激光投影机包括:In a second aspect, a laser projector is provided. The laser projector includes:
光机、投影镜头和激光光源,所述激光光源为第一方面所述的激光光源;An optical machine, a projection lens, and a laser light source, the laser light source is the laser light source described in the first aspect;
所述光机用于在受到所述激光光源出射的光束的照射时,将所述光束调制生成影像光束;The optical machine is used to modulate the light beam to generate an image light beam when irradiated by the light beam emitted from the laser light source;
所述投影镜头用于将所述影像光束投射至投影屏幕上。The projection lens is used to project the image beam onto the projection screen.
本申请的实施例提供的技术方案可以包括以下有益效果:The technical solutions provided by the embodiments of the present application may include the following beneficial effects:
本申请实施例提供的激光光源以及激光投影机,由于激光光源中的荧光装置具有反射作用,保证了荧光装置的有效出光,提高了激光光源对蓝色激光和荧光的收光效率。进一步的,由于聚光装置将蓝色激光折射得到非准直的蓝色激光,而该非准直的蓝色激光照射到荧光粉上的能量密度相较于径缩处理的蓝色激光的照射到荧光粉上的能量密度较小,当该非准直的蓝色激光照射至荧光粉上时,降低了对荧光粉的激发效率的影响,提高了荧光粉的实际激发效率,从而提高了该激光光源的发光效率。因此,该激光光源在保证了蓝色激光和荧光的收光效率的同时,也提高了激光光源的发光效率。In the laser light source and the laser projector provided in the embodiments of the present application, since the fluorescent device in the laser light source has a reflection function, the effective light output of the fluorescent device is ensured, and the light collection efficiency of the laser light source for blue laser and fluorescence is improved. Further, because the condensing device refracts the blue laser to obtain a non-collimated blue laser, and the energy density of the non-collimated blue laser irradiated on the phosphor is smaller than that of the diameter-shrinked blue laser The energy density on the phosphor is small. When the non-collimated blue laser is irradiated onto the phosphor, the impact on the excitation efficiency of the phosphor is reduced, and the actual excitation efficiency of the phosphor is improved, thereby improving the The luminous efficiency of the laser light source. Therefore, the laser light source also improves the luminous efficiency of the laser light source while ensuring the collection efficiency of the blue laser light and the fluorescent light.
为了更清楚地说明本申请的实施例,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。In order to more clearly explain the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. Ordinary technicians can obtain other drawings based on these drawings without paying any creative labor.
图1是本申请部分实施例涉及的一种实施环境示意图。FIG. 1 is a schematic diagram of an implementation environment involved in some embodiments of the present application.
图2是相关技术一种激光光源的结构示意图。2 is a schematic structural diagram of a laser light source in the related art.
图3是发散角的示意图。Fig. 3 is a schematic diagram of the divergence angle.
图4是本申请一示意性实施例提供的一种激光光源的结构示意图。4 is a schematic structural diagram of a laser light source provided by an exemplary embodiment of the present application.
图5是本申请一示意性实施例提供的一种荧光装置的截面示意图。5 is a schematic cross-sectional view of a fluorescent device provided by an exemplary embodiment of the present application.
图6是本申请一示意性实施例提供的一种激光光源的结构示意图。6 is a schematic structural diagram of a laser light source provided by an exemplary embodiment of the present application.
图7是本申请一示意性实施例提供的一种激光光源的结构示意图。7 is a schematic structural diagram of a laser light source provided by an exemplary embodiment of the present application.
此处的附图被并入说明书中并构成本说明书的一部分,示出了符合本申请的实施例,并与说明书一起用于解释本申请的原理。The drawings herein are incorporated into and constitute a part of this specification, show embodiments consistent with this application, and are used together with the specification to explain the principles of this application.
为了使本申请的目的、技术方案和优点更加清楚,下面将结合附图对本申请作进一步地详细描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其它实施例,都属于本申请保护的范围。In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be described in further detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by a person of ordinary skill in the art without making creative efforts fall within the scope of protection of this application.
请参考图1,其示出了本申请部分实施例所涉及的实施环境的示意图。该实施环境可以包括:激光光源10、光机20和投影镜头30,该激光光源10、光机20和投影镜头30沿光束传输方向依次排列。其中,激光光源10用于出射光束,光机20用于在受到激光光源10出射的光束的照射时,将光束调制得到影像光束,投影镜头30用于将影像光束投射至投影屏幕40上。示例的,上述激光光源10、光机20和投影镜头30可以应用于激光投影机1中。Please refer to FIG. 1, which illustrates a schematic diagram of an implementation environment involved in some embodiments of the present application. The implementation environment may include: a laser light source 10, an optical machine 20, and a projection lens 30, and the laser light source 10, the optical machine 20, and the projection lens 30 are sequentially arranged along the beam transmission direction. Among them, the laser light source 10 is used to emit a light beam, the optical machine 20 is used to modulate the light beam to obtain an image light beam when the light beam emitted from the laser light source 10 is irradiated, and the projection lens 30 is used to project the image light beam onto the projection screen 40. Illustratively, the above-mentioned laser light source 10, optical machine 20 and projection lens 30 may be applied to the laser projector 1.
目前的激光投影机的激光光源有多种,该激光光源可以包括:至少一个激光器,激光光源用于发射至少一种颜色的激光。示例的,该激光光源可以是单色激光光源(即包括一个激光器且该激光器发射一种颜色的激光),也可以是多色激光光源(即包括多个激光器且激光器共发射多种颜色的激光)。例如,当该激光光源为单色激光光源时,该激光光源包括的一个激光器可以是蓝色激光器、红色激光器或者绿色激光器;当该激光光源为多色激光光源时,该多个激光器可以包括蓝色激光器、红色激光器和/或者绿色激光器。There are multiple laser light sources in current laser projectors. The laser light source may include: at least one laser, and the laser light source is used to emit laser light of at least one color. For example, the laser light source may be a monochromatic laser light source (that is, it includes a laser and the laser emits laser light of one color), or it may be a multicolor laser light source (that is, it includes multiple lasers and the laser emits laser lights of multiple colors in total) ). For example, when the laser light source is a monochromatic laser light source, one laser included in the laser light source may be a blue laser, a red laser, or a green laser; when the laser light source is a multicolor laser light source, the plurality of lasers may include blue Color laser, red laser and/or green laser.
如图2所示,该激光光源10至少包括荧光轮110、滤色轮120、蓝色激光 器130、合光部件140、光束整形部件150和光收集部件160。该蓝色激光器130、光束整形部件150、合光部件140、荧光轮110、滤色轮120和光收集部件160沿蓝色激光的传输方向依次排列。其中,蓝色激光器130用于发出蓝色激光。光束整形部件150用于将蓝色激光器130发出的蓝色激光进行径缩处理得到径缩后的准直的蓝色激光,并将该准直的蓝色激光传输至合光部件140。合光部件140用于将接收的蓝色激光传输至荧光轮110,合光部件140还用于将荧光轮110透射的蓝色分量传输至滤色轮120,该蓝光分量为蓝色激光照射到透射区后,由透射区透射的蓝色激光的光分量,合光部件140还用于将荧光轮110发出的荧光传输至滤色轮120,荧光由蓝色激光照射荧光区所产生。滤色轮120用于在转动时,时序性地输出红光、蓝光和绿光,该红光和绿光由滤色轮120对荧光进行过滤处理得到,该蓝光由滤色轮120透射蓝色激光得到。光收集部件160用于对红光、蓝光和绿光进行匀光处理。As shown in FIG. 2, the laser light source 10 includes at least a fluorescent wheel 110, a color filter 120, a blue laser 130, a light combining member 140, a beam shaping member 150, and a light collecting member 160. The blue laser 130, the beam shaping member 150, the light combining member 140, the fluorescent wheel 110, the color filter 120, and the light collecting member 160 are arranged in this order along the transmission direction of the blue laser light. The blue laser 130 is used to emit blue laser light. The beam shaping member 150 is used to reduce the diameter of the blue laser emitted by the blue laser 130 to obtain a collimated blue laser beam after the diameter reduction, and transmit the collimated blue laser beam to the light combining member 140. The light combining component 140 is used to transmit the received blue laser to the fluorescent wheel 110, and the light combining component 140 is also used to transmit the blue component transmitted by the fluorescent wheel 110 to the color filter 120, and the blue component is irradiated by the blue laser After the transmissive area, the light component of the blue laser light transmitted by the transmissive area, the light combining part 140 is also used to transmit the fluorescent light emitted by the fluorescent wheel 110 to the color filter wheel 120, and the fluorescent light is generated by the blue laser light irradiating the fluorescent area. The color filter 120 is used to output red light, blue light, and green light in sequence when the light is rotated. The red light and green light are filtered by the color filter 120, and the blue light is transmitted by the color filter 120. Laser get. The light collecting part 160 is used to perform uniform light processing on red light, blue light and green light.
该激光光源的出光过程为:蓝色激光器130发出的蓝色激光,由光束整形装置150对蓝色激光束形后,出射至合光部件140,再透射至荧光轮110;荧光轮110时序性地转动,当蓝色激光照射到荧光轮110上的透射区时,蓝色激光从荧光轮110透射,经过蓝色激光的中继回路光路(指图2中蓝色激光从荧光轮110传输至合光部件140的光路回路)后再次透过合光部件140,并经过滤色轮120后进入光收集部件160;当蓝色激光照射到荧光轮110上的荧光区时,激发荧光区上的荧光粉发出至少一种颜色的荧光(例如图2中的黄色荧光和/或绿色荧光),激发出的荧光反向传输,由合光部件140反射至滤色轮120,然后进入光收集部件160。上述三种颜色的光(简称三色光)经过光收集部件160后,通过光机20的调制生成影像光束,该影像光束传输至投影镜头30,最 终实现三色光的图像输出。The light emitting process of the laser light source is as follows: the blue laser light emitted by the blue laser 130 is shaped by the beam shaping device 150 to the blue laser beam, then emitted to the light combining part 140, and then transmitted to the fluorescent wheel 110; Rotation, when the blue laser irradiates the transmission area on the fluorescent wheel 110, the blue laser is transmitted from the fluorescent wheel 110 and passes through the blue laser relay circuit optical path (referring to the blue laser transmitted from the fluorescent wheel 110 to the The light path of the light combining part 140) passes through the light combining part 140 again, and enters the light collecting part 160 after filtering the color wheel 120; when the blue laser irradiates the fluorescent area on the fluorescent wheel 110, the The phosphor emits at least one color of fluorescence (for example, yellow fluorescence and/or green fluorescence in FIG. 2 ), and the excited fluorescence is reversely transmitted, reflected by the light combining part 140 to the color wheel 120, and then enters the light collecting part 160 . After passing through the light collecting part 160, the three colors of light (referred to as tri-color light for short) generate an image beam by modulation of the optical machine 20, and the image beam is transmitted to the projection lens 30 to finally realize the image output of the tri-color light.
但是,由于蓝色激光经过径缩处理后,其照射到荧光粉上的能量密度较大,且在激发荧光粉的激光的能量密度达到一定密度后,该激发荧光粉的激光对荧光粉的激发效率的具有一定的影响,该影响使得荧光粉的实际激发效率与该激光的能量密度负相关,也即是当激发荧光粉的激光的能量密度越大时,实际激发出的荧光较少。因此,目前的激光光源的结构容易导致荧光粉的实际激发效率较低。However, since the blue laser undergoes a diameter reduction process, the energy density irradiated on the phosphor is relatively large, and after the energy density of the laser that excites the phosphor reaches a certain density, the laser that excites the phosphor excites the phosphor The efficiency has a certain effect, which makes the actual excitation efficiency of the phosphor inversely related to the energy density of the laser, that is, when the energy density of the laser that excites the phosphor is larger, the actually excited fluorescence is less. Therefore, the structure of the current laser light source is likely to cause the actual excitation efficiency of the phosphor to be low.
为了方便读者理解,本申请实施例对下文涉及的一些定义进行解释。To facilitate readers' understanding, the embodiments of the present application explain some definitions involved below.
发散角θ:光束发散角为光束半径对远场轴向位置的导数。如图3所示,发散角为光束上相对于光轴L2对称的两点p1、p2分别与焦点的连线的夹角,该焦点为光束光轴所在直线L2和束腰直径L1的焦点。Divergence angle θ: The beam divergence angle is the derivative of the beam radius with respect to the axial position of the far field. As shown in FIG. 3, the divergence angle is the angle between the two points p1 and p2 on the beam that are symmetric with respect to the optical axis L2 and the focal point, which is the focal point of the straight line L2 where the beam optical axis is located and the beam waist diameter L1.
半发散角1/2θ:光束发散角的一半。如图3所示,半发散角为光束上相对于光轴L2对称的一点p1或p2与焦点的连线的夹角,该焦点为光束光轴所在直线L2和束腰直径L1的焦点。 Half divergence angle 1/2θ: half of the beam divergence angle. As shown in FIG. 3, the half divergence angle is the angle between the point p1 or p2 on the beam that is symmetrical with respect to the optical axis L2 and the focal line, which is the focal point of the straight line L2 where the beam optical axis lies and the beam waist diameter L1.
色温:表示光线中包含颜色成分的一个计量单位。从理论上讲,色温是指绝对黑体从绝对零度(-273℃)开始加温后所呈现的颜色。如果某一光源发出的光,与某一温度下黑体发出的光所含的光谱成分相同,即称该某一光源的色温为该黑体的温度加上273K(开尔文)。例如100W(瓦特)灯泡发出光的颜色与绝对黑体在2527K时的颜色相同,该灯泡发出的光的色温为2527K+273K=2800K。Color temperature: A unit of measurement that contains color components in light. Theoretically, the color temperature refers to the color presented by the absolute black body after heating from absolute zero (-273°C). If the light emitted by a certain light source has the same spectral component as the light emitted by a black body at a certain temperature, the color temperature of the certain light source is called the temperature of the black body plus 273K (Kelvin). For example, the color of the light emitted by a 100W (watt) bulb is the same as the color of an absolute black body at 2527K. The color temperature of the light emitted by the bulb is 2527K+273K=2800K.
光通量:发光体每秒钟所发出的光量的总和,单位为lm(流明)。Luminous flux: The total amount of light emitted by the luminous body per second, the unit is lm (lumens).
激发效率:发光体受到每瓦特能量的激发时发出的光亮的总和,单位为lm/W。Excitation efficiency: the sum of the light emitted by the luminous body when it is excited by the energy per watt, the unit is lm/W.
准直光:光束中的光线相互平行。Collimated light: The rays in the beam are parallel to each other.
非准直光:也即是发散光,也即是光束中的光线不平行。Non-collimated light: that is, divergent light, that is, the light in the beam is not parallel.
光学扩展量:光源和照明系统的匹配参量。Optical expansion: matching parameters of light source and lighting system.
光学扩展量守恒:指的是光源和照明系统的光学扩展量相同,对应本申请实施例,则为激光光源与光阀和投影镜头的光学扩展量相同。Conservation of optical expansion: refers to the same optical expansion of the light source and the illumination system. Corresponding to the embodiment of the present application, the laser light source has the same optical expansion as the light valve and the projection lens.
本申请实施例提供了一种激光光源,可以解决上述问题。请参考图4,图4是本申请实施例提供的一种激光光源的结构示意图。其中,假设激光光源中的一个激光器为蓝色激光器。则该激光光源10包括:The embodiments of the present application provide a laser light source, which can solve the above problems. Please refer to FIG. 4, which is a schematic structural diagram of a laser light source according to an embodiment of the present application. It is assumed that one laser in the laser light source is a blue laser. Then the laser light source 10 includes:
蓝色激光器101、聚光装置102和荧光装置103,聚光装置102位于蓝色激光器101和荧光装置103之间。The blue laser 101, the condensing device 102, and the fluorescent device 103 are located between the blue laser 101 and the fluorescent device 103.
蓝色激光器101用于发出蓝色激光。示例的,该蓝色激光通常为准直的蓝色激光。聚光装置102用于将接收的蓝色激光折射得到非准直的蓝色激光后,传输至荧光装置103。示例的,该聚光装置102可以是一个具有折射功能的透镜,也可以是一个具有折射功能的透镜系统,其由多个透镜组成。实际应用中,该聚光结构102可以是一个凸透镜。该非准直的蓝色激光指的是半发散角为α的蓝色激光,0°<α<90°。The blue laser 101 is used to emit blue laser light. For example, the blue laser is usually a collimated blue laser. The condensing device 102 is used to refract the received blue laser light to obtain a non-collimated blue laser light, and then transmit it to the fluorescent device 103. Exemplarily, the light-concentrating device 102 may be a lens with a refractive function, or a lens system with a refractive function, which is composed of multiple lenses. In practical applications, the light-concentrating structure 102 may be a convex lens. The non-collimated blue laser refers to a blue laser with a half divergence angle α, 0°<α<90°.
荧光装置103为管状结构,荧光装置103的内表面中至少部分区域为荧光区(图4中以荧光装置103的内表面的黑色区域表示荧光区),荧光区用于在蓝色激光的激发下发出荧光,荧光装置103的管壁用于反射接收的蓝色激光和荧光。该荧光装置103用于输出不同颜色的光。示例的,该不同颜色的光可以是三基色所需的光。如该不同颜色的光可以包括黄光、蓝光和绿光,或者包括红 光、绿光和蓝光,或者包括红光、黄光和蓝光,或者包括黄光、绿光、红光和蓝光。需要说明的是,该荧光区的形状可以为环形,也可以为条形,本申请实施对此不做限定。The fluorescent device 103 has a tubular structure, and at least part of the inner surface of the fluorescent device 103 is a fluorescent region (the black region on the inner surface of the fluorescent device 103 in FIG. 4 represents the fluorescent region). The fluorescent region is used under the excitation of a blue laser Fluorescence is emitted, and the wall of the fluorescent device 103 is used to reflect the received blue laser light and fluorescence. The fluorescent device 103 is used to output different colors of light. Exemplarily, the light of different colors may be light required by three primary colors. For example, the different colors of light may include yellow light, blue light, and green light, or red light, green light, and blue light, or red light, yellow light, and blue light, or yellow light, green light, red light, and blue light. It should be noted that the shape of the fluorescent area may be a ring shape or a bar shape, which is not limited in the implementation of this application.
其中,为了使荧光区可以在蓝色激光的激发下发出不同颜色的荧光,该荧光区的表面设置有不同颜色的荧光粉,从而使该荧光区在受到蓝色激光的照射时,可以通过激发相应颜色的荧光粉,以发出荧光粉所对应颜色的光。因此,该荧光区可以根据设置的荧光粉的颜色划分为多个对应颜色的子荧光区。示例的,该荧光粉的颜色可以是绿色、黄色、红色和/或橙色,则该多个子荧光区可以包括:与前述颜色一一对应的绿色子荧光区、黄色子荧光区、红色子荧光区和/或橙色子荧光区。Among them, in order to enable the fluorescent region to emit different colors of fluorescence under the excitation of the blue laser, the surface of the fluorescent region is provided with phosphors of different colors, so that when the fluorescent region is irradiated by the blue laser, it can be excited by Fluorescent powder of corresponding color to emit light of the color corresponding to the fluorescent powder. Therefore, the fluorescent area can be divided into a plurality of sub-fluorescence areas of corresponding colors according to the color of the set phosphor. Exemplarily, the color of the phosphor may be green, yellow, red, and/or orange, then the plurality of sub-fluorescence regions may include: a green sub-fluorescence region, a yellow sub-fluorescence region, and a red sub-fluorescence region, which correspond to the aforementioned colors one-to-one And/or orange sub-fluorescence zone.
上述激光光源10的出光过程为:蓝色激光器101发出蓝色激光,该蓝色激光经过聚光装置102折射后成为非准直的蓝色激光,该非准直的蓝色激光进入荧光装置103后照射至该荧光装置103的管壁上。其中,照射至管壁内表面上荧光区的部分蓝色激光,激发该荧光区上的荧光粉输出至少一种颜色的荧光(如图4所示的黄色荧光和/或绿色荧光),该至少一种颜色的荧光和照射至管壁其他区域(即除荧光区之外的区域)的部分蓝色激光,经过管壁的多次漫反射(入光角度为第二角度的光照射至荧光区时,该荧光粉对上述光造成的反射为漫反射)和反射后输出,未照射至荧光装置103内表面的部分蓝色激光直接输出,实现激光光源的照明功能。The light emitting process of the laser light source 10 is as follows: the blue laser 101 emits blue laser light, and the blue laser light is refracted by the condensing device 102 to become a non-collimated blue laser light, and the non-collimated blue laser light enters the fluorescent device 103 Afterwards, the tube wall of the fluorescent device 103 is irradiated. Wherein, a part of the blue laser light irradiated to the fluorescent area on the inner surface of the tube wall excites the phosphor on the fluorescent area to output at least one color of fluorescence (yellow fluorescence and/or green fluorescence as shown in FIG. 4). Fluorescence of one color and a part of blue laser light irradiated to other areas of the tube wall (that is, areas other than the fluorescent area), multiple diffuse reflections through the wall of the tube (light incident at a second angle of incidence to the fluorescent area At this time, the reflection of the phosphor on the light is diffuse reflection) and output after reflection, and a part of the blue laser light that is not irradiated to the inner surface of the fluorescent device 103 is directly output to realize the illumination function of the laser light source.
综上所述,本申请实施例提供的激光光源中,由于荧光装置具有反射作用,保证了荧光装置的有效出光,提高了激光光源对蓝色激光和荧光的收光效率。进一步的,由于聚光装置将蓝色激光折射得到非准直的蓝色激光,而该非准直 的蓝色激光的照射至荧光粉上的能量密度相较于径缩处理的蓝色激光的照烧至荧光粉上的能量密度较小,当该非准直的蓝色激光照射至荧光粉上时,降低了对荧光粉的激发效率的影响,提高了荧光粉的实际激发效率,从而提高了该激光光源的发光效率。因此,该激光光源在保证了蓝色激光和荧光的收光效率的同时,也提高了激光光源的发光效率。In summary, in the laser light source provided by the embodiments of the present application, since the fluorescent device has a reflection function, the effective light output of the fluorescent device is ensured, and the light-receiving efficiency of the blue light and fluorescent light by the laser light source is improved. Further, because the condensing device refracts the blue laser to obtain a non-collimated blue laser, the energy density of the non-collimated blue laser irradiated onto the phosphor is compared to that of the diameter-shrinked blue laser The energy density irradiated onto the phosphor is small. When the non-collimated blue laser is irradiated onto the phosphor, the impact on the excitation efficiency of the phosphor is reduced, and the actual excitation efficiency of the phosphor is improved, thereby improving The luminous efficiency of the laser light source. Therefore, the laser light source also improves the luminous efficiency of the laser light source while ensuring the collection efficiency of the blue laser light and the fluorescent light.
可选的,荧光装置103的内表面中部分区域为荧光区,荧光装置103还具有反射区,该反射区在所述荧光装置内表面上的正投影覆盖荧光区,该反射区包覆该荧光区。该反射区用于反射该荧光装置中传输的光(蓝色激光和蓝色激光激发的荧光)。例如,该反射区包括第一反射区和第二反射区。其中,该第一反射区在所述荧光装置内表面上的正投影与荧光区不重叠,该第一反射区通常相较于荧光区远离荧光装置的入口(该荧光装置的入口为荧光装置靠近蓝色激光器一端的开口)布置。该第一反射区通过多次反射荧光装置中传输的光(例如对光进行全反射),从而使得该光的亮度更加均匀,以达到对荧光装置103中传输的光的匀化。该第二反射区在所述荧光装置内表面上的正投影与荧光区重叠,如外表面区域和管壁区域等,例如,该第二反射区可以通过涂覆在荧光装置内表面的反射膜实现,相应的,该荧光区可以通过涂覆在该反射膜上的荧光粉实现。该第二反射区通过多次反射荧光装置中传输的光,以避免该荧光装置中的光的损耗,从而保证荧光装置的有效出光,提高了激光光源的收光效率,同时,对光的多次反射也使得光线更为均匀。因此,由于该荧光装置中存在反射区,在保证了荧光装置的有效出光的同时,输出的光的亮度更加均匀,从而使得该激光光源不需要光棒即可实现对光的匀光处理。Optionally, a part of the area in the inner surface of the fluorescent device 103 is a fluorescent area, and the fluorescent device 103 further has a reflective area. The orthographic projection of the reflective area on the inner surface of the fluorescent device covers the fluorescent area, and the reflective area covers the fluorescent area Area. The reflection area is used to reflect the light (blue laser and blue laser excited fluorescence) transmitted in the fluorescent device. For example, the reflective area includes a first reflective area and a second reflective area. Wherein, the orthographic projection of the first reflecting area on the inner surface of the fluorescent device does not overlap with the fluorescent area. The first reflecting area is usually farther away from the entrance of the fluorescent device than the fluorescent area (the entrance of the fluorescent device is close to the fluorescent device The opening at one end of the blue laser) is arranged. The first reflection area reflects the light transmitted in the fluorescent device multiple times (for example, total reflection of the light), so that the brightness of the light is more uniform, so as to achieve the homogenization of the light transmitted in the fluorescent device 103. The orthographic projection of the second reflecting area on the inner surface of the fluorescent device overlaps with the fluorescent area, such as the outer surface area and the tube wall area, etc. For example, the second reflecting area may be a reflective film coated on the inner surface of the fluorescent device Realization, correspondingly, the fluorescent zone can be realized by a fluorescent powder coated on the reflective film. The second reflection area reflects the light transmitted in the fluorescent device multiple times to avoid the loss of light in the fluorescent device, thereby ensuring the effective light emission of the fluorescent device, improving the light collection efficiency of the laser light source, and at the same time, The secondary reflection also makes the light more uniform. Therefore, due to the reflection area in the fluorescent device, the brightness of the output light is more uniform while ensuring the effective light emission of the fluorescent device, so that the laser light source can realize the uniform light treatment of the light without a light rod.
实际应用中,荧光区通常位于荧光装置103靠近蓝色激光器101的一端, 也即是位于荧光装置入口所在端。这样,该荧光区出射的荧光可以经过反射区更多次数的反射,从而使得荧光装置输出的荧光的亮度更加均匀,进而使该荧光装置的匀光作用更强。In practical applications, the fluorescent zone is usually located at the end of the fluorescent device 103 close to the blue laser 101, that is, at the end of the entrance of the fluorescent device. In this way, the fluorescent light emitted from the fluorescent area can be reflected by the reflection area more times, so that the brightness of the fluorescent light output by the fluorescent device is more uniform, and then the uniform light effect of the fluorescent device is stronger.
可选的,荧光装置103可以为方形管状结构(即荧光装置的横截面的形状为两个嵌套的矩形,该横截面垂直于荧光装置的延伸方向),也可以为菱形管状结构(即荧光装置的横截面的形状为两个嵌套的菱形,该横截面垂直于荧光装置的延伸方向)。由于方形管状结构和菱形管状结构为轴对称,因此,降低了制造工艺的难度。Optionally, the fluorescent device 103 may be a square tubular structure (that is, the cross-sectional shape of the fluorescent device is two nested rectangles, the cross-section is perpendicular to the extending direction of the fluorescent device), or a diamond-shaped tubular structure (that is, fluorescent The shape of the cross section of the device is two nested diamonds, the cross section being perpendicular to the direction of extension of the fluorescent device). Since the square tubular structure and the diamond-shaped tubular structure are axisymmetric, the difficulty of the manufacturing process is reduced.
为了使荧光装置103的管壁可以反射接收的蓝色激光和荧光,该荧光装置103的管壁可以设置有反射膜层,例如反射率>90%的高反射膜层。示例的,该高反射膜层可以为高反射铝膜或者高反射银膜。或者,该荧光装置103的管壁还可以由高反射的材料制成。In order to enable the tube wall of the fluorescent device 103 to reflect the received blue laser light and fluorescence, the tube wall of the fluorescent device 103 may be provided with a reflective film layer, for example, a highly reflective film layer with a reflectivity >90%. For example, the high-reflection film layer may be a high-reflection aluminum film or a high-reflection silver film. Alternatively, the tube wall of the fluorescent device 103 may also be made of a highly reflective material.
实际应用中,由于该激光光源需要满足光学扩展量守恒,因此,激光光源10还包括:角度滤光片104,角度滤光片104设置在荧光装置103远离蓝色激光器101的一端。该角度滤光片104用于透射入光角度(也即是入射角)处于第一角度范围的光,反射入光角度处于第二角度范围的光,第一角度范围中的角度小于第二角度范围中的角度。其中,第一角度范围与第二角度范围的并集为0-90,两者不存在交集,且该第一角度范围的上限小于指定角度,该第二角度范围的下限大于指定角度。示例的,该角度滤光片可以是具有光学膜层的透光器件。In practical applications, since the laser light source needs to satisfy the conservation of optical expansion, the laser light source 10 further includes: an angle filter 104, which is disposed at the end of the fluorescent device 103 away from the blue laser 101. The angle filter 104 is used to transmit light whose incident angle (that is, incident angle) is in the first angular range, and reflect light whose incident angle is in the second angular range, and the angle in the first angular range is smaller than the second angle The angle in the range. The union of the first angle range and the second angle range is 0-90. There is no intersection between the two, and the upper limit of the first angle range is less than the specified angle, and the lower limit of the second angle range is greater than the specified angle. For example, the angle filter may be a light-transmitting device with an optical film layer.
在确定了激光光源配置中的光机与投影镜头的类型后,根据光学扩展量守恒的原则,该激光光源的光学扩展量为定值,而前述该指定角度与光学扩展量 相关,因此当确定了光学扩展量时,可以根据该光学扩展量计算得到指定角度。其中,该光学扩展量U和指定角度的关系,满足:After determining the types of optical machine and projection lens in the configuration of the laser light source, according to the principle of conservation of optical expansion, the optical expansion of the laser light source is a fixed value, and the aforementioned specified angle is related to the optical expansion, so when determining When the optical expansion amount is obtained, the specified angle can be calculated according to the optical expansion amount. Among them, the relationship between the optical expansion U and the specified angle satisfies:
U=πA×sin2δ,A为荧光装置被光束照射的面积,也即是荧光装置的横截面的面积,δ为光束照射的面积的法线与光束的立体角的光轴的夹角,也即是指定角度。U=πA×sin2δ, A is the area of the fluorescent device irradiated by the beam, that is, the cross-sectional area of the fluorescent device, δ is the angle between the normal of the area irradiated by the beam and the optical axis of the solid angle of the beam, that is, Is the specified angle.
在实际的激光光源的设计中,通常要使其出射的光的色温达到某一范围内,因此,需要配比激光光源出射的不同颜色的光的光功率。由于光的颜色与激光器和荧光粉有关,且由于某一颜色的荧光的光功率与该颜色的荧光粉的涂覆(也即是该颜色的子荧光区)的面积、蓝色激光照射至该颜色的子荧光区的能量密度、荧光装置的横截面积、照射至该颜色的子荧光区的蓝色激光的光功率和照射至该颜色的子荧光区的蓝色激光的第一入光角范围(也即是半发散角的范围)有关。因此,在设计荧光装置中各个子荧光区的面积(也即是各个颜色的荧光粉的涂覆的面积)时,应该考虑蓝色激光照射至该颜色的子荧光区的能量密度、第一入光角范围、照射至该颜色的子荧光区的蓝色激光的光功率以及荧光装置的横截面积。其中,该第一入光角范围为蓝色激光通过荧光装置靠近蓝色激光器的一端的开口所在面时,该蓝色激光的传输方向与开口所在面的法向的夹角的角度范围。In the design of actual laser light sources, the color temperature of the light emitted from them is usually within a certain range. Therefore, it is necessary to match the optical power of different colors of light emitted from the laser light source. Because the color of the light is related to the laser and the phosphor, and because the power of the fluorescence of a certain color and the area of the coating of the phosphor of the color (that is, the sub-fluorescence region of the color), the blue laser light is irradiated to the The energy density of the sub-fluorescence zone of the color, the cross-sectional area of the fluorescent device, the optical power of the blue laser irradiated to the sub-fluorescence zone of the color, and the first incident angle of the blue laser irradiated to the sub-fluorescence zone of the color The range (that is, the range of the half divergence angle) is related. Therefore, when designing the area of each sub-fluorescence zone in the fluorescent device (that is, the area where each color phosphor is coated), the energy density and the first The optical angle range, the optical power of the blue laser irradiated to the sub-fluorescence region of the color, and the cross-sectional area of the fluorescent device. Wherein, the first incident angle range is the angle range of the angle between the transmission direction of the blue laser and the normal direction of the surface of the opening when the blue laser passes through the fluorescent device near the opening of the end of the blue laser.
示例的,如图4和5所述,假设荧光装置103方形管状结构,其横截面(该横截面垂直于荧光装置的延伸方向)的形状为两个嵌套的矩形,即呈“回”字形,该两个嵌套的矩形中位于内部的矩形(对应该荧光装置的内表面)的面积为a×b平方毫米,其中a为位于内部的矩形的宽度,单位为毫米,b为位于内部的矩形的长度,单位为毫米,该荧光装置103的内表面具有一个荧光区,且 位于该荧光装置103靠近蓝色激光器101的一端。该荧光区包括:黄色子荧光区和绿色子荧光区,蓝色激光的半发散角γ的角度范围为0°-50°,该蓝色激光的光功率为100W,且能量分布均匀,也即是每1°的蓝色激光的光功率为1W,即能量密度为1,各个颜色的荧光粉的激光效率均为300lm/W,根据该激光光源的光学扩展量守恒,计算得到该荧光装置的角度滤光区透射的光的入光角的第一角度范围的最大值为10°,且假设该激光光源所需输出的色温约为7500K。For example, as described in FIGS. 4 and 5, assuming that the fluorescent device 103 has a square tubular structure, the shape of the cross section (the cross section is perpendicular to the extending direction of the fluorescent device) is two nested rectangles, that is, a “back” shape , The area of the inner rectangle (corresponding to the inner surface of the fluorescent device) of the two nested rectangles is a×b square millimeter, where a is the width of the inner rectangle, the unit is mm, and b is the inner rectangle The length of the rectangle is in millimeters. The inner surface of the fluorescent device 103 has a fluorescent area, and is located at the end of the fluorescent device 103 near the blue laser 101. The fluorescent region includes: a yellow sub-fluorescent region and a green sub-fluorescent region. The angle range of the semi-divergence angle γ of the blue laser is 0°-50°, the optical power of the blue laser is 100W, and the energy distribution is uniform, that is, The optical power of the blue laser per 1° is 1W, that is, the energy density is 1, the laser efficiency of the phosphors of each color is 300lm/W, according to the conservation of the optical expansion of the laser light source, the The maximum value of the first angle range of the incident angle of the light transmitted through the angle filter area is 10°, and it is assumed that the required color temperature of the laser light source is about 7500K.
则,该荧光装置的角度滤光区透射的蓝色激光的入光角的第一角度范围的最大值为10°,也即是蓝色激光中不用于激发荧光粉的蓝色激光(即蓝色激光中除用于激发荧光粉的部分蓝色激光之外的另一部分蓝色激光)的最大半发散角γ的角度为10°,未照射到荧光粉上的蓝光的光功率约为10×2×1=20W(光通量为612lm),激光光源出射的蓝色激光的光功率约为20W,未照射到荧光粉上的蓝光的光功率约为100-20=80W,荧光装置出射的荧光的光功率为80W,荧光的光通量为80W×300lm//W=24000lm,照射至荧光区的蓝色激光(即蓝色激光中用于激发荧光粉的部分蓝色激光)的最大半发散角β角度为50-10=40°,根据7500K色温的要求,确定黄光和蓝光的光功率的比例为2:1,则黄光和蓝光的光通量的比例为2:1,该黄色子荧光区和绿色子荧光区的面积比2:1。荧光区的总面积为2ab×[(tanβ-tanγ)/(tanγ×tanβ)],黄色子荧光区的面积为2/3×2ab[(tanβ-tanγ)/(tanα×tanγ)],绿色子荧光区的面积为1/3×2ab[(tanβ-tanγ)/(tanγ×tanβ)]。激光光源输出的黄光、绿光和蓝光的光通量为24000+612=24612lm。Then, the maximum value of the first angle range of the incident angle of the blue laser transmitted through the angle filter area of the fluorescent device is 10°, which is the blue laser that is not used to excite the phosphor in the blue laser (i.e. blue In addition to the blue laser used to excite the phosphor, the maximum half divergence angle γ of the color laser is 10°, and the optical power of the blue light that is not irradiated on the phosphor is about 10× 2×1=20W (luminous flux is 612lm), the optical power of the blue laser emitted by the laser light source is about 20W, and the optical power of the blue light that is not irradiated on the phosphor is about 100-20=80W. The optical power is 80W, the luminous flux of fluorescence is 80W×300lm//W=24000lm, the maximum half divergence angle β angle of the blue laser (that is, the part of the blue laser used to excite the phosphor in the blue laser) irradiated to the fluorescent area It is 50-10=40°. According to the requirement of 7500K color temperature, the ratio of the light power of yellow light and blue light is determined to be 2:1, then the ratio of the luminous flux of yellow light and blue light is 2:1. The area ratio of the sub-fluorescence zone is 2:1. The total area of the fluorescent area is 2ab×[(tanβ-tanγ)/(tanγ×tanβ)], the area of the yellow fluorescent area is 2/3×2ab[(tanβ-tanγ)/(tanα×tanγ)], the green area The area of the fluorescent zone is 1/3×2ab[(tanβ-tanγ)/(tanγ×tanβ)]. The luminous flux of yellow light, green light and blue light output by the laser light source is 24000+612=24612lm.
进一步的,由于该荧光装置需要输出蓝色激光,因此,该荧光装置的长度L 满足:L>a×[(tanβ-tanγ)/(tanγ×tanβ)],且L>b×[(tanβ-tanγ)/(tanγ×tanβ)]。Further, since the fluorescent device needs to output blue laser light, the length L of the fluorescent device satisfies: L>a×[(tanβ-tanγ)/(tanγ×tanβ)], and L>b×[(tanβ- tanγ)/(tanγ×tanβ)].
进一步的,由于荧光装置中荧光区出射的荧光为朗勃体,因此,一部分荧光可能输出至荧光装置入口,进而通过该荧光装置入口射出,并且,上述角度滤光片反射的光也可能从该荧光装置入口射出。这样会造成光的损耗。Further, since the fluorescence emitted from the fluorescent area of the fluorescent device is a Lambertian body, part of the fluorescence may be output to the entrance of the fluorescent device, and then exit through the entrance of the fluorescent device, and the light reflected by the angle filter may also be emitted from the The entrance of the fluorescent device is emitted. This will cause loss of light.
基于此,本申请实施例提供的激光光源10还包括:二向色件105,二向色件105设置在荧光装置103靠近蓝色激光器101的一端。该二向色件105用于透射蓝色激光(短波长的光),并反射荧光(长波长的光)。示例的,该二向色件105可以是具有光学膜层的透光器件,例如滤色片或者二向色片。这样,避免了输出至该荧光装置入口处的一部分荧光和角度滤光片反射的光从荧光装置入口射出,减少光的损耗。Based on this, the laser light source 10 provided by the embodiment of the present application further includes: a dichroic member 105, which is disposed at an end of the fluorescent device 103 close to the blue laser 101. The dichroic element 105 is used to transmit blue laser light (short-wavelength light) and reflect fluorescence (long-wavelength light). For example, the dichroic member 105 may be a light-transmitting device with an optical film layer, such as a color filter or a dichroic sheet. In this way, a part of the fluorescence output to the entrance of the fluorescent device and the light reflected by the angle filter are prevented from being emitted from the entrance of the fluorescent device, reducing the loss of light.
可选的,该激光光源10还包括:滤色轮106,该滤色轮106位于荧光装置103远离蓝色激光器101的一侧,滤色轮106用于时序性地输出不同颜色的光。示例的,该滤色轮106用于时序性地输出红光、蓝光、绿光和黄光;或者,该滤色轮106用于时序性地输出红光、绿光和蓝光。Optionally, the laser light source 10 further includes a color filter wheel 106, which is located on the side of the fluorescent device 103 away from the blue laser 101, and the color filter wheel 106 is used to output different colors of light in a sequential manner. For example, the color filter 106 is used to output red light, blue light, green light, and yellow light in time sequence; or, the color filter 106 is used to output red light, green light, and blue light in time sequence.
由于当该荧光装置的荧光区包括多个子荧光区时,该荧光装置在同一时间会输出不同颜色的光,因此,该滤色轮106可以包括红光滤光区、绿光滤光区、黄光滤光区和蓝光滤光区至少三个滤色区(红光滤光区、绿光滤光区、黄光滤光区和蓝光滤光区的统称),以使得激光光源可以在同一时间仅输出一种颜色的光。其中,该红光滤光区用于将荧光装置输出的不同颜色的光进行过滤处理得到红光,绿光滤光区用于将荧光装置输出的不同颜色的光进行过滤处理得到绿光,黄光滤光区用于将荧光装置输出的不同颜色的光进行过滤处理得到黄光, 蓝光滤光区用于将荧光装置输出的不同颜色的光进行过滤处理得到蓝光。根据滤色轮输出的光的颜色的不同,该滤色轮可以包括不同的滤光区。示例的,滤色轮输出的不同颜色的光包括红光、黄光、绿光和蓝光,相应的,滤色轮包括红光滤光区、黄光滤光区、绿光滤光区和蓝光滤光区;滤色轮输出的不同颜色的光包括红光、绿光和蓝光,相应的,滤色轮包括红光滤光区、绿光滤光区和蓝光滤光区。Since when the fluorescent region of the fluorescent device includes multiple sub-fluorescent regions, the fluorescent device will output different colors of light at the same time, therefore, the color filter 106 may include a red filter region, a green filter region, and a yellow filter region At least three color filter areas (red light filter area, green light filter area, yellow light filter area and blue light filter area) in the light filter area and blue light filter area, so that the laser light source can be at the same time Only one color of light is output. Wherein, the red light filter area is used for filtering the light of different colors output by the fluorescent device to obtain red light, and the green light filter area is used for filtering the light of different colors output by the fluorescent device to obtain green light and yellow The light filter area is used for filtering the light of different colors output by the fluorescent device to obtain yellow light, and the blue light filter area is used for filtering the light of different colors output by the fluorescent device to obtain blue light. Depending on the color of the light output by the color filter wheel, the color filter wheel may include different filter regions. For example, the different colors of light output by the color filter include red light, yellow light, green light, and blue light. Correspondingly, the color filter includes red light filter area, yellow light filter area, green light filter area, and blue light Filter area; the light of different colors output by the color wheel includes red light, green light and blue light. Correspondingly, the color wheel includes red light filter area, green light filter area and blue light filter area.
则,该激光光源10的出光过程包括:蓝色激光器101发出的蓝色激光,该蓝色激光经过聚光装置102折射后成为非准直的蓝色激光,该非准直的蓝色激光进入荧光装置103后照射至该荧光装置103的管壁上。其中,照射至管壁内表面上荧光区的部分蓝色激光,激发该荧光区上的荧光粉输出至少一种颜色的荧光,输出至荧光装置入口的部分荧光经过二向色件105和荧光装置103的管壁反射,传输至角度滤光片104;除却输出至荧光装置入口的部分荧光的另一部分荧光和未照射至管壁内表面上荧光区的部分蓝色激光通过荧光装置103的管壁反射,传输至角度滤光片104;未照射至荧光装置103内表面的部分蓝色激光直接传输至角度滤光片104。该角度滤光片104将入光角度为第一角度的光(蓝色激光和荧光)透射输出,将入光角度为第二角度的光反射至荧光装置103的管壁,经过管壁和滤光片105多次漫反射和反射后,成为第一角度的光通过角度滤光片104输出。最终从荧光装置103输出的不同颜色的光,也即是荧光和蓝色激光,出射至滤色轮106,经过过滤处理后,从该激光光源出射,实现激光光源的照明功能。Then, the light emitting process of the laser light source 10 includes: the blue laser light emitted by the blue laser 101, which is refracted by the condensing device 102 to become a non-collimated blue laser light, and the non-collimated blue laser light enters The fluorescent device 103 is then irradiated onto the tube wall of the fluorescent device 103. Wherein, a part of the blue laser light irradiated to the fluorescent area on the inner surface of the tube wall excites the phosphor on the fluorescent area to output at least one color of fluorescent light, and the partial fluorescent light output to the entrance of the fluorescent device passes through the dichroic member 105 and the fluorescent device The reflection of the tube wall of 103 is transmitted to the angle filter 104; the other part of the fluorescence except the part of the fluorescence output to the entrance of the fluorescent device and the part of the blue laser that is not irradiated to the fluorescent area on the inner surface of the tube wall pass through the wall of the fluorescent device 103 It is reflected and transmitted to the angle filter 104; a part of the blue laser light that is not irradiated to the inner surface of the fluorescent device 103 is directly transmitted to the angle filter 104. The angle filter 104 transmits and outputs light (blue laser and fluorescence) with an incident angle of the first angle, reflects light with an incident angle of the second angle to the wall of the fluorescent device 103, and passes through the wall and the filter After the light sheet 105 diffusely reflects and reflects multiple times, the light at the first angle is output through the angle filter 104. Finally, different colors of light output from the fluorescent device 103, that is, fluorescent and blue laser light, are output to the color filter 106, and after filtering, they are emitted from the laser light source to realize the illumination function of the laser light source.
可选的,如图6所示,该激光光源10还包括:散热结构107,该散热结构107设置在荧光装置103的管壁外侧。散热结构107用于对荧光装置103进行 散热。示例的,该散热结构107可以是连接在管壁外侧的贴片散热器或者环绕在管壁外侧的液冷散热器。由于该荧光装置的管壁外侧上设置有散热结构,因此,可以有效地解决该荧光装置中蓝色激光激发荧光粉时产生的热量的问题,增加激光光源的寿命。Optionally, as shown in FIG. 6, the laser light source 10 further includes a heat dissipation structure 107 that is disposed outside the tube wall of the fluorescent device 103. The heat dissipation structure 107 is used to dissipate the fluorescent device 103. For example, the heat dissipation structure 107 may be a patch radiator connected to the outside of the tube wall or a liquid cooling radiator surrounding the outside of the tube wall. Because the heat dissipation structure is provided on the outside of the tube wall of the fluorescent device, the problem of heat generated when the blue laser in the fluorescent device excites the phosphor can be effectively solved, and the life of the laser light source can be increased.
请参考图7,图7是本申请实施例提供的另一种激光光源10的结构示意图。其中,图7以激光光源为双色激光光源为例进行说明,图7假设一个激光器为蓝色激光器,另一个激光器为红色激光器。Please refer to FIG. 7, which is a schematic structural diagram of another laser light source 10 provided by an embodiment of the present application. Among them, FIG. 7 takes a laser light source as a two-color laser light source as an example for description. FIG. 7 assumes that one laser is a blue laser and the other laser is a red laser.
在图7中,该激光光源10还包括红色激光器108,该红色激光器108用于发出红色激光。可选的,该激光光源10还包括合光部件109,该合光部件10用于将接收到的蓝色激光和红色激光传输至聚光装置102。图7中的蓝色激光器101、聚光装置102、荧光装置103、角度滤光片104、二向色件105和滤色轮106的结构与原理可以参考前述图4所示的激光光源10,本申请实施例对此不再赘述。In FIG. 7, the laser light source 10 further includes a red laser 108 that is used to emit red laser light. Optionally, the laser light source 10 further includes a light combining part 109, and the light combining part 10 is used to transmit the received blue laser light and red laser light to the light collecting device 102. The structure and principle of the blue laser 101, the condensing device 102, the fluorescent device 103, the angle filter 104, the dichroic element 105, and the color wheel 106 in FIG. 7 can refer to the laser light source 10 shown in FIG. 4, This embodiment of the present application will not repeat them here.
示例的,该激光光源的出光过程包括:蓝色激光器101发出的蓝色激光,红色激光器108发出的红色激光,该激光(为红色激光和蓝色激光的统称)经过聚光装置102折射后成为非准直的激光,该非准直的激光进入荧光装置103后照射至该荧光装置103的管壁上。其中,照射至管壁内表面上荧光区p的部分激光,激发该荧光区p上的荧光粉输出至少一种颜色的荧光(例如图5中的黄色荧光和/或绿色荧光),输出至荧光装置入口的部分荧光经过二向色件105和荧光装置103的管壁反射,传输至角度滤光片104输出;未照射至管壁内表面上荧光区p的部分激光和除却输出至荧光装置入口的部分荧光的另一部分荧 光通过荧光装置103的管壁反射,传输至角度滤光片104输出,未照射至荧光装置103内表面的部分蓝色激光直接传输至角度滤光片104。该角度滤光片104将入光角度为第一角度的光(蓝色激光和荧光)透射输出,将入光角度为第二角度的光反射至荧光装置的管壁,经过管壁和滤光片105多次漫反射和反射后,成为第一角度的光通过角度滤光片104输出。最终从荧光装置103输出的不同颜色的光,也即是荧光和激光,出射至滤色轮106,经过过滤处理后,从该激光光源出射,实现激光光源的照明功能。Exemplarily, the light emitting process of the laser light source includes: blue laser light emitted by the blue laser 101 and red laser light emitted by the red laser 108. The laser light (which is a collective name of the red laser and the blue laser) is refracted by the condensing device 102 to become The non-collimated laser light enters the fluorescent device 103 and irradiates the tube wall of the fluorescent device 103. Wherein, a part of the laser light irradiated to the fluorescent area p on the inner surface of the tube wall excites the phosphor on the fluorescent area p to output at least one color of fluorescence (such as yellow fluorescence and/or green fluorescence in FIG. 5), which is output to the fluorescence Part of the fluorescence at the entrance of the device is reflected by the dichroic 105 and the tube wall of the fluorescent device 103 and transmitted to the output of the angle filter 104; the part of the laser light that is not irradiated to the fluorescent area p on the inner surface of the tube wall is output to the entrance of the fluorescent device The other part of the fluorescence is reflected by the wall of the fluorescent device 103 and transmitted to the output of the angle filter 104. The blue laser light that is not irradiated to the inner surface of the fluorescent device 103 is directly transmitted to the angle filter 104. The angle filter 104 transmits light (blue laser and fluorescence) with an incident angle of the first angle, reflects light with an incident angle of the second angle to the tube wall of the fluorescent device, passes through the tube wall and filters light After the sheet 105 is diffusely reflected and reflected multiple times, the light at the first angle is output through the angle filter 104. Finally, the different colors of light output from the fluorescent device 103, that is, fluorescence and laser light, are emitted to the color filter 106, and after filtering, they are emitted from the laser light source to realize the illumination function of the laser light source.
需要说明的是,该激光光源出射的红光包括红色激光器发出的红色激光和/或由黄色荧光经过滤色轮的过滤处理后得的红光。It should be noted that the red light emitted by the laser light source includes red laser light emitted by the red laser and/or red light obtained by filtering the yellow fluorescence through the filter color wheel.
上述图7所示的激光光源中的红色激光光源可以替换成绿色激光器,绿色激光器用于发出绿光激光。此时,该激光光源的出光过程与上述出光过程相同,本申请实施例对此不再赘述。仅需说明的是,该激光光源出射的红光为由黄色荧光经过滤色轮的过滤处理后得的红光,该激光光源出射的绿光包括绿色激光器发出的绿色激光和/或由绿色荧光经过滤色轮的过滤处理后得的绿光。The red laser light source in the laser light source shown in FIG. 7 may be replaced with a green laser, and the green laser is used to emit green laser light. At this time, the light emitting process of the laser light source is the same as the above light emitting process, which will not be repeated in the embodiments of the present application. It should be noted that the red light emitted by the laser light source is red light obtained by filtering the yellow fluorescent light through the color wheel. The green light emitted by the laser light source includes green laser light emitted by the green laser and/or green fluorescence light The green light obtained by the filtering treatment of the color wheel.
本申请实施例提供了再一种激光光源,该激光光源可以为三色激光光源,则一个激光器可以为蓝色激光器、另一个激光器可以为红色激光器,再一激光器可以为绿色激光器。该三色激光器和上述双色激光器的出光过程基本相同,本申请实施例对此不做赘述。An embodiment of the present application provides yet another laser light source. The laser light source may be a three-color laser light source, then one laser may be a blue laser, the other laser may be a red laser, and the other laser may be a green laser. The light emitting process of the three-color laser and the above-mentioned two-color laser is basically the same, which will not be repeated in the embodiments of the present application.
综上所述,本申请实施例提供的激光光源中,由于荧光装置具有反射作用,保证了荧光装置的有效出光,提高了激光光源对蓝色激光和荧光的收光效率,同时,该反射作用使得该荧光装置具有匀光作用。进一步的,由于聚光装置将 蓝色激光折射得到非准直的蓝色激光,而该非准直的蓝色激光照射到荧光粉上的能量密度,相较于径缩处理的蓝色激光的照射到荧光粉上的能量密度较小,当该非准直的蓝色激光照射至荧光粉上时,降低了对荧光粉的激发效率的影响,提高了荧光粉的实际激发效率,从而提高了该激光光源的发光效率。因此,该激光光源在保证了蓝色激光和荧光的收光效率的同时,也保证了激光光源的发光效率。同时,当该激光光源不包括滤色轮时,该激光光源可以用于手电等照明系统,由于该激光光源可以同时输出多种颜色的光,因此,其总体的发光效率较高。In summary, in the laser light source provided by the embodiments of the present application, since the fluorescent device has a reflection function, the effective light output of the fluorescent device is ensured, and the light-receiving efficiency of the laser light source for blue laser and fluorescence is improved. At the same time, the reflection function So that the fluorescent device has a uniform light effect. Further, because the condensing device refracts the blue laser to obtain a non-collimated blue laser, and the energy density of the non-collimated blue laser irradiated on the phosphor is compared with that of the blue laser of the diameter reduction process The energy density irradiated on the phosphor is small. When the non-collimated blue laser is irradiated on the phosphor, the impact on the excitation efficiency of the phosphor is reduced, and the actual excitation efficiency of the phosphor is improved, thereby improving the The luminous efficiency of this laser light source. Therefore, the laser light source ensures the light-receiving efficiency of the blue laser light and the fluorescent light, and the luminous efficiency of the laser light source. At the same time, when the laser light source does not include a color filter, the laser light source can be used in a lighting system such as a flashlight. Since the laser light source can output multiple colors of light at the same time, its overall luminous efficiency is high.
进一步的,由于该荧光装置的管壁外侧上设置有散热结构,因此,有效地解决了该荧光装置中蓝色激光激发荧光粉时产生的热量的问题,增加了该激光光源的寿命。Further, since the heat dissipation structure is provided on the outside of the tube wall of the fluorescent device, the problem of heat generated when the blue laser in the fluorescent device excites the phosphor powder is effectively solved, and the life of the laser light source is increased.
如图1所示,本申请实施例提供了一种激光投影机,该激光投影机包括:激光光源10、光机20和投影镜头30,该激光光源10为上述任一的激光光源。光机20位于激光光源10和投影镜头30之间。其中,该光机20用于在受到激光光源10出射的光束的照射时,将光束调制生成影像光束。示例的,该光机包括光阀,该光阀可以是数字微镜器件(英文:Digital Micro mirror Device,简称:DMD)。投影镜头30用于将影像光束投射至投影屏幕40上。As shown in FIG. 1, an embodiment of the present application provides a laser projector. The laser projector includes a laser light source 10, an optical machine 20, and a projection lens 30. The laser light source 10 is any of the laser light sources described above. The optical machine 20 is located between the laser light source 10 and the projection lens 30. The optical machine 20 is used to modulate the light beam to generate a video light beam when irradiated with the light beam emitted from the laser light source 10. Exemplarily, the optical machine includes a light valve, and the light valve may be a digital micromirror device (English: Digital Micromirror Device, abbreviated as DMD). The projection lens 30 is used to project the image beam onto the projection screen 40.
综上所述,本申请实施例提供的激光投影机,由于激光投影机中激光光源的荧光装置具有反射作用,保证了激光光源对蓝色激光和荧光的收光效率。进一步的,由于聚光装置将蓝色激光折射得到非准直的蓝色激光,而该非准直的蓝色激光照射到荧光粉上的能量密度相较于径缩处理的蓝色激光的照射到荧光 粉上能量密度较小,当该非准直的蓝色激光照射至荧光粉上时,降低了对荧光粉的激发效率的影响,提高了荧光粉的实际激发效率,从而提高了该激光光源的发光效率。因此,该激光光源在保证了蓝色激光和荧光的收光效率的同时,也提高了激光光源的发光效率,进而提高了激光投影机的发光效率。In summary, the laser projector provided by the embodiment of the present application, because the fluorescent device of the laser light source in the laser projector has a reflection function, ensures the light collection efficiency of the laser light source for the blue laser and fluorescence. Further, because the condensing device refracts the blue laser to obtain a non-collimated blue laser, and the energy density of the non-collimated blue laser irradiated on the phosphor is smaller than that of the diameter-shrinked blue laser The energy density on the phosphor is small. When the non-collimated blue laser is irradiated onto the phosphor, the impact on the excitation efficiency of the phosphor is reduced, and the actual excitation efficiency of the phosphor is improved, thereby improving the laser. The luminous efficiency of the light source. Therefore, the laser light source not only ensures the collection efficiency of the blue laser and fluorescence, but also improves the luminous efficiency of the laser light source, thereby further improving the luminous efficiency of the laser projector.
本领域技术人员在考虑说明书及实践这里公开的发明后,将容易想到本申请的其它实施方案。本申请旨在涵盖本申请的任何变型、用途或者适应性变化,这些变型、用途或者适应性变化遵循本申请的一般性原理并包括本申请未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的,本申请的真正范围和精神由权利要求指出。After considering the description and practicing the invention disclosed herein, those skilled in the art will easily think of other embodiments of the present application. This application is intended to cover any variations, uses, or adaptive changes of this application, which follow the general principles of this application and include common general knowledge or customary technical means in the technical field not disclosed in this application . The description and examples are considered exemplary only, and the true scope and spirit of this application are pointed out by the claims.
应当理解的是,本申请并不局限于上面已经描述并在附图中示出的精确结构,并且可以在不脱离其范围进行各种修改和改变。本申请的范围仅由所附的权利要求来限制。It should be understood that the present application is not limited to the precise structure that has been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of this application is limited only by the appended claims.
Claims (10)
- 一种激光光源,其特征在于,所述激光光源包括:A laser light source, characterized in that the laser light source includes:蓝色激光器、聚光装置和荧光装置,所述聚光装置位于所述蓝色激光器和所述荧光装置之间;A blue laser, a light collecting device and a fluorescent device, the light collecting device is located between the blue laser and the fluorescent device;所述蓝色激光器用于发出蓝色激光;The blue laser is used to emit blue laser;所述聚光装置用于将接收的蓝色激光折射得到非准直的蓝色激光后,传输至所述荧光装置;The light collecting device is used to refract the received blue laser light to obtain a non-collimated blue laser light, and then transmit it to the fluorescent device;所述荧光装置为管状结构,所述荧光装置的内表面中至少部分区域为荧光区,所述荧光区用于在蓝色激光的激发下发出荧光,所述荧光装置的管壁用于反射接收的蓝色激光和所述荧光;The fluorescent device is a tubular structure, at least part of the inner surface of the fluorescent device is a fluorescent area, the fluorescent area is used to emit fluorescence under the excitation of a blue laser, and the tube wall of the fluorescent device is used for reflection and reception The blue laser and the fluorescence;所述荧光装置用于输出不同颜色的光。The fluorescent device is used to output different colors of light.
- 根据权利要求1所述的激光光源,其特征在于,所述激光光源还包括:The laser light source according to claim 1, wherein the laser light source further comprises:角度滤光片,所述角度滤光片设置在所述荧光装置远离所述蓝色激光器的一端,所述角度滤光片用于透射入光角度处于第一角度范围的光,反射入光角度处于第二角度范围的光,所述第一角度范围中的角度小于所述第二角度范围中的角度。Angle filter, the angle filter is disposed at the end of the fluorescent device away from the blue laser, the angle filter is used to transmit light with an incident angle in the first angle range, and reflect the incident angle For light in the second angle range, the angle in the first angle range is smaller than the angle in the second angle range.
- 根据权利要求1所述的激光光源,其特征在于,所述激光光源还包括:The laser light source according to claim 1, wherein the laser light source further comprises:二向色件,所述二向色件设置在所述荧光装置靠近所述蓝色激光器的一端,所述二向色件用于透射蓝色激光,并反射荧光。A dichroic element. The dichroic element is disposed at an end of the fluorescent device close to the blue laser. The dichroic element is used to transmit blue laser light and reflect fluorescence.
- 根据权利要求1所述的激光光源,其特征在于,The laser light source according to claim 1, wherein所述荧光装置的内表面中部分区域为所述荧光区,所述荧光装置还具有反射区,所述反射区在所述荧光装置内表面上的正投影覆盖所述荧光区,所述反射区用于反射所述荧光装置中传输的光。A part of the area in the inner surface of the fluorescent device is the fluorescent area, and the fluorescent device further has a reflective area, orthographic projection of the reflective area on the inner surface of the fluorescent device covers the fluorescent area, and the reflective area It is used to reflect the light transmitted in the fluorescent device.
- 根据权利要求4所述的激光光源,其特征在于,The laser light source according to claim 4, characterized in that所述荧光区位于所述荧光装置靠近所述蓝色激光器的一端。The fluorescent area is located at an end of the fluorescent device close to the blue laser.
- 根据权利要求4所述的激光光源,其特征在于,The laser light source according to claim 4, characterized in that所述荧光装置的管壁设置有反射膜层。The tube wall of the fluorescent device is provided with a reflective film layer.
- 根据权利要求1所述的激光光源,其特征在于,The laser light source according to claim 1, wherein所述荧光装置为方形管状结构。The fluorescent device is a square tubular structure.
- 根据权利要求1所述的激光光源,其特征在于,所述激光光源还包括:The laser light source according to claim 1, wherein the laser light source further comprises:滤色轮,所述滤色轮位于所述荧光装置远离所述蓝色激光器的一侧,所述滤色轮用于时序性地输出不同颜色的光;A color filter wheel, the color filter wheel is located on a side of the fluorescent device away from the blue laser, and the color filter wheel is used to output light of different colors in a sequential manner;所述滤色轮输出的不同颜色的光包括:红光、黄光、绿光和蓝光,相应的,所述滤色轮包括红光滤光区、黄光滤光区、绿光滤光区和蓝光滤光区;The light of different colors output by the color filter includes: red light, yellow light, green light and blue light, and correspondingly, the color filter includes a red light filter area, a yellow light filter area and a green light filter area And blue light filter area;或者,所述滤色轮输出的不同颜色的光包括:红光、绿光和蓝光,相应的,所述滤色轮包括红光滤光区、绿光滤光区和蓝光滤光区;Alternatively, the light of different colors output by the color filter includes: red light, green light and blue light, and correspondingly, the color filter includes a red light filter area, a green light filter area and a blue light filter area;其中,所述红光滤光区用于将所述不同颜色的光进行过滤处理得到红光;Wherein, the red light filtering area is used to filter the light of different colors to obtain red light;所述绿光滤光区用于将所述不同颜色的光进行过滤处理得到绿光;The green light filtering area is used for filtering the light of different colors to obtain green light;所述黄光滤光区用于将所述不同颜色的光进行过滤处理得到黄光;The yellow light filtering area is used for filtering the light of different colors to obtain yellow light;所述蓝光滤光区用于将所述不同颜色的光进行过滤处理得到蓝光。The blue light filter area is used to filter the light of different colors to obtain blue light.
- 根据权利要求8所述的激光光源,其特征在于,所述激光光源还包括:The laser light source according to claim 8, wherein the laser light source further comprises:红色激光器,所述红色激光器用于发出红色激光,所述红色激光经由所述荧光装置入射至所述滤色轮。A red laser is used to emit red laser light, and the red laser light is incident on the color filter wheel through the fluorescent device.和/或,绿色激光器,所述绿色激光器用于发出绿色激光,所述绿色激光经由所述荧光装置入射至所述滤色轮。And/or a green laser, the green laser is used to emit a green laser, and the green laser is incident on the color filter wheel through the fluorescent device.
- 一种激光投影机,其特征在于,所述激光投影机包括:A laser projector, characterized in that the laser projector includes:光机、投影镜头和激光光源,所述激光光源为权利要求1至9任一所述的激光光源;An optical machine, a projection lens and a laser light source, the laser light source is the laser light source according to any one of claims 1 to 9;所述光机用于在受到所述激光光源出射的光束的照射时,将所述光束调制生成影像光束;The optical machine is used to modulate the light beam to generate an image light beam when irradiated by the light beam emitted from the laser light source;所述投影镜头用于将所述影像光束投射至投影屏幕上。The projection lens is used to project the image beam onto the projection screen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811628741.9 | 2018-12-28 | ||
CN201811628741.9A CN111381424A (en) | 2018-12-28 | 2018-12-28 | Laser light source and laser projector |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2020134785A1 true WO2020134785A1 (en) | 2020-07-02 |
Family
ID=71127455
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CN2019/120637 WO2020134785A1 (en) | 2018-12-28 | 2019-11-25 | Laser light source and laser projection device |
Country Status (2)
Country | Link |
---|---|
CN (1) | CN111381424A (en) |
WO (1) | WO2020134785A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113900339B (en) | 2020-06-22 | 2022-09-27 | 青岛海信激光显示股份有限公司 | Light source assembly and projection equipment |
WO2021259270A1 (en) | 2020-06-22 | 2021-12-30 | 青岛海信激光显示股份有限公司 | Light source assembly and projection device |
CN113050354B (en) * | 2021-03-05 | 2023-09-15 | 青岛海信激光显示股份有限公司 | Light source assembly and projection device |
WO2022095005A1 (en) * | 2020-11-09 | 2022-05-12 | 新沂市锡沂高新材料产业技术研究院有限公司 | Solid-state illumination light source with high brightness and adjustable color temperature |
CN114995044A (en) * | 2021-02-26 | 2022-09-02 | 中强光电股份有限公司 | Omnidirectional display device |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100046234A1 (en) * | 2008-01-16 | 2010-02-25 | Abu-Ageel Nayef M | Illumination Systems Utilizing Wavelength Conversion Materials |
JP2012069387A (en) * | 2010-09-24 | 2012-04-05 | Jvc Kenwood Corp | Light source device and projection type display device |
CN205281102U (en) * | 2015-10-07 | 2016-06-01 | 杨毅 | Illuminator , projection display equipment and lamps and lanterns |
CN107250909A (en) * | 2015-02-20 | 2017-10-13 | 株式会社理光 | Illumination device and image projection apparatus |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102650811B (en) * | 2011-08-27 | 2016-01-27 | 深圳市光峰光电技术有限公司 | Optical projection system and light-emitting device thereof |
CN103615671B (en) * | 2013-10-28 | 2018-04-13 | 杨毅 | Light source |
RU2686980C2 (en) * | 2014-10-21 | 2019-05-06 | ФОРД ГЛОУБАЛ ТЕКНОЛОДЖИЗ, ЭлЭлСи | Photoluminescent changing color ceiling lamp for card illumination |
CN104635411B (en) * | 2015-01-27 | 2016-11-30 | 上海理工大学 | Projection display system |
-
2018
- 2018-12-28 CN CN201811628741.9A patent/CN111381424A/en active Pending
-
2019
- 2019-11-25 WO PCT/CN2019/120637 patent/WO2020134785A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100046234A1 (en) * | 2008-01-16 | 2010-02-25 | Abu-Ageel Nayef M | Illumination Systems Utilizing Wavelength Conversion Materials |
JP2012069387A (en) * | 2010-09-24 | 2012-04-05 | Jvc Kenwood Corp | Light source device and projection type display device |
CN107250909A (en) * | 2015-02-20 | 2017-10-13 | 株式会社理光 | Illumination device and image projection apparatus |
CN205281102U (en) * | 2015-10-07 | 2016-06-01 | 杨毅 | Illuminator , projection display equipment and lamps and lanterns |
Also Published As
Publication number | Publication date |
---|---|
CN111381424A (en) | 2020-07-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2020134785A1 (en) | Laser light source and laser projection device | |
JP5411910B2 (en) | Light source system | |
JP5979365B2 (en) | Light source device and image display device | |
US20180080627A1 (en) | Light sources system and projection device using the same | |
US8789957B2 (en) | Light source module and projection apparatus | |
JP2019061237A (en) | Illumination system and projection apparatus using illumination system | |
JP4715916B2 (en) | LIGHTING DEVICE AND PROJECTOR HAVING THE SAME | |
US20130088689A1 (en) | Light source module and projection apparatus | |
JP2024023800A (en) | Light source device, image projection device, and light source optical system | |
JP4235829B2 (en) | LIGHTING DEVICE AND PROJECTOR HAVING THE LIGHTING DEVICE | |
US9977316B2 (en) | Projection apparatus and illumination system thereof | |
CN109212878B (en) | Projection system | |
JP7434808B2 (en) | Light source device and image projection device | |
TW201317702A (en) | Optical mechanical of projector | |
WO2020088671A1 (en) | Illumination system | |
US20190253676A1 (en) | Illumination system and projection apparatus | |
CN209388102U (en) | A kind of Wavelength converter, laser source system and projector | |
TWI656361B (en) | Illumination system and projection apparatus | |
JP7413740B2 (en) | Light source device, image projection device, and light source optical system | |
US11647171B2 (en) | Projection apparatus including an illumination system, a light valve and a projection lens | |
US11402738B2 (en) | Illumination system and projection apparatus | |
WO2020149047A1 (en) | Collimator lens, light source device, and image display device | |
TWI656395B (en) | Light tunnel and porjector display apparatus having light tunnel | |
TW201643540A (en) | Laser LED hybrid light source for projection display | |
JP4189262B2 (en) | Multiple lamp device for optical device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19905438 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 19905438 Country of ref document: EP Kind code of ref document: A1 |