JP4529946B2 - Vehicle lighting - Google Patents

Description

  The present invention uses a semiconductor-type light source such as an LED as a light source, and reflects the light from the semiconductor-type light source twice on the first reflecting surface and the second reflecting surface to irradiate the outside of the vehicle. It is about. In particular, the present invention forms a projector-type lamp unit equivalent to a projector-type lamp unit that uses an ellipse or a reflecting surface based on an ellipse without using the reflecting surface based on an ellipse or an ellipse. The present invention relates to a vehicular lamp.

  This type of vehicular lamp is conventionally known (for example, Patent Document 1). Hereinafter, the vehicle lamp will be described. A conventional vehicular lamp reflects light of an LED as a light source by an elliptical first reflecting mirror, reflects the reflected light by a parabolic second reflecting mirror, and transmits the reflected light to the outside, for example, in front of the vehicle. Is irradiated.

  However, since the conventional vehicular lamp uses the elliptical first reflecting mirror, there is a problem that the dimension in the direction connecting the first focal point and the second focal point of the elliptical first reflecting mirror becomes large. .

JP 2004-207235 A

  The problem to be solved by the present invention is that, in the conventional vehicular lamp, the dimension in the direction connecting the first focal point and the second focal point of the ellipse or the reflecting surface based on the ellipse becomes large.

  The present invention (the invention according to claim 1) includes a first paraboloid, a paraboloid of revolution, and a paraboloid of revolution, or a paraboloid of revolution and a paraboloid of revolution. The second reflecting surface whose focal point is based on the surface is a semiconductor-type light source or in the vicinity thereof, and the optical axis of the first reflecting surface and the optical axis of the second reflecting surface are substantially parallel.

  Further, the present invention (the invention according to claim 2) is characterized in that the semiconductor-type light source and the second reflecting surface form a pair, and a plurality of pairs are provided.

  Further, according to the present invention (the invention according to claim 3), the radiation direction of light from the semiconductor-type light source is substantially opposite to the irradiation direction of light from the projection lens, and the optical axis of the second reflecting surface is the first reflecting surface. The semiconductor light source is located on the projection lens side from the state where the optical axis of the first reflecting surface and the optical axis of the second reflecting surface are orthogonal to the optical axis of the projection lens. It is characterized by crossing in a leaning state.

  Furthermore, the present invention (the invention according to claim 4) is characterized in that a semiconductor-type light source is provided with a heat sink, and the heat sink is disposed in the vicinity of the projection lens.

  Furthermore, in the present invention (the invention according to claim 5), the semiconductor light source and the second reflecting surface are arranged in two stages in the radiation direction of the light from the semiconductor light source, and the light from the semiconductor light source is emitted. The radiation direction is substantially the same as the irradiation direction of light from the projection lens, the optical axis of the second reflection surface is located on the opposite side of the projection lens with respect to the optical axis of the first reflection surface, and the light of the first reflection surface The axis and the optical axis of the second reflecting surface intersect with the optical axis of the projection lens in a tilted state where the semiconductor light source approaches the projection lens side.

  In the vehicular lamp according to the present invention (the invention according to claim 1), when light from the semiconductor light source is reflected by the second reflecting surface by means for solving the above problems, reflected light parallel to each other is formed. When the parallel reflected light is reflected by the first reflecting surface, the reflected light is focused (converged) on the focal point of the projection lens, and diverged (radiated) from the focal point of the projection lens to pass through the projection lens. Irradiated outside. As a result, the vehicular lamp of the present invention (the invention according to claim 1) can constitute a projector-type lamp unit equivalent to a projector-type lamp unit that uses an ellipse or an ellipse-based reflecting surface. . Therefore, the vehicular lamp according to the present invention (the invention according to claim 1) is provided with a shade at or near the focal point of the projection lens, thereby providing a predetermined light distribution pattern having a cut-off line, such as a passing light distribution pattern, A light distribution pattern for highways can be formed. In addition, since the vehicular lamp of the present invention (the invention according to claim 1) does not use an ellipse or an ellipse-based reflecting surface, it is compared with a vehicular lamp that uses an ellipse or an ellipse-based reflecting surface. And can be made compact.

  In the vehicle lamp of the present invention (the invention according to claim 2), the semiconductor light source and the second reflecting surface form a pair and have a plurality of pairs. The amount of light can be increased. Moreover, the vehicular lamp of the present invention (the invention according to claim 2) can form a light distribution pattern for each pair of the semiconductor light source and the second reflecting surface. The light distribution pattern can be easily controlled by appropriately controlling turning on and off.

  Furthermore, in the vehicular lamp according to the present invention (the invention according to claim 3), the portion close to the focal point of the second reflecting surface of the second reflecting surface is from the semiconductor-type light source. It is easy to diffuse (diverge) and reflect light, and the first reflecting surface easily reflects the diffuse reflected light to the periphery of the projection lens, so it is suitable for forming the periphery of the light distribution pattern that carries the front side illumination. ing. On the other hand, the portion of the second reflecting surface that is far from the focal point of the second reflecting surface easily collects (converges) and reflects the light from the semiconductor light source, and the first reflecting surface reflects the condensed reflected light of the projection lens. Since it is easy to reflect in the central part, it is suitable for forming the central part of the light distribution pattern that carries far-distance illumination.

  Furthermore, the vehicular lamp of the present invention (invention according to claim 4) is a place other than the semiconductor light source by using a heat sink to generate heat in the semiconductor light source by means for solving the above-mentioned problems. Since the light is transmitted (radiated) to the projection lens side, the light emitting function of the semiconductor-type light source can be maintained, and the fogging attached to the projection lens can be removed.

  Furthermore, the vehicular lamp of the present invention (the invention according to claim 5) is the same as that of the invention according to claim 3 by means for solving the above-mentioned problems. 2 The portion near the focal point of the reflective surface is easy to diffuse (diverge) reflect light from the semiconductor-type light source, and the first reflective surface easily reflects the diffuse reflected light to the periphery of the projection lens. It is suitable for forming the peripheral portion of the light distribution pattern that bears. On the other hand, the portion of the second reflecting surface that is far from the focal point of the second reflecting surface easily collects (converges) and reflects the light from the semiconductor light source, and the first reflecting surface reflects the condensed reflected light of the projection lens. Since it is easy to reflect in the central part, it is suitable for forming the central part of the light distribution pattern that carries far-distance illumination. In addition, the vehicular lamp of the present invention (the invention according to claim 5) can arrange the semiconductor-type light source and the second reflecting surface in two stages in the radiation direction of the light from the semiconductor-type light source. The pair consisting of the mold light source and the second reflecting surface can be further increased. As a result, the vehicular lamp of the present invention (the invention according to claim 5) can increase the amount of light emitted from the projection lens, and can further finely control the light distribution pattern.

  Below, two examples of the Example of the vehicle lamp concerning this invention are demonstrated in detail based on drawing. Note that the present invention is not limited to the embodiments. Further, in this specification, “front, rear, upper, lower, left, right” is “front, rear, upper, lower, left, right” of the vehicle when the vehicle lamp is mounted on the vehicle. Further, in the drawings, reference sign “VU-VD” indicates vertical lines on the upper and lower sides of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen.

  1 to 7 show Embodiment 1 of a vehicular lamp according to the present invention. Hereinafter, the configuration of the vehicular lamp according to the first embodiment will be described. In this example, for example, an automotive headlamp will be described. In the figure, reference numeral 1 denotes a vehicular lamp according to the first embodiment. As shown in the figure, the vehicular lamp 1 is a projector type and has a unit structure. The vehicular lamp 1 includes an upper first reflector 2, a lower second reflector 3, a plurality of, in this example, three semiconductor-type light sources 4, a shade 5, and a projection lens (convex lens, condenser lens). ) 6, a holder 7, a heat sink 8, and a lamp housing and a lamp lens (for example, a transparent outer lens) of an automotive headlamp (not shown).

  The first reflector 2, the second reflector 3, the three semiconductor light sources 4, the shade 5, the projection lens 6, the holder 7 and the heat sink 8 constitute a lamp unit. The lamp unit is disposed, for example, via an optical axis adjusting mechanism in a lamp chamber defined by a lamp housing and a lamp lens of an automotive headlamp.

  The first reflector 2 is fixedly held by the holder 7. The first reflector 2 is composed of a light impermeable resin member or the like. The first reflector 2 has a front portion and a lower portion that are open, and a rear portion, an upper portion, and left and right portions are closed. The first reflecting surface 9 is provided on the concave inner surface of the closed portion of the first reflector 2 by aluminum deposition or silver coating.

  The first reflecting surface 9 is a reflecting surface such as a rotating paraboloid or a free curved surface (NURBS curved surface) based on a rotating paraboloid. For this purpose, the first reflecting surface 9 has a focal point F1 and a rotation axis, that is, an optical axis Z1-Z1.

  The second reflector 3 is fixedly held by the holder 7. The second reflector 3 is composed of a light impermeable resin member or the like. As for the said 2nd reflector 3, the front part and the upper part open, and the rear part, the lower part, and the right and left both sides are obstruct | occluded. On the concave inner surface of the closed portion of the second reflector 3, aluminum deposition or silver coating is applied, and three second reflecting surfaces 10L, 10C, 10R are provided side by side in the left-right direction.

  The three second reflecting surfaces 10L, 10C, 10R are made of a reflecting surface such as a rotating paraboloid or a free-form surface (NURBS surface) based on the rotating paraboloid. For this purpose, the three second reflecting surfaces 10L, 10C, and 10R each have a focal point F2 and a rotation axis, that is, an optical axis Z2-Z2. As shown in FIG. 4, the focal points F2 of the three second reflecting surfaces 10L, 10C, and 10R are located on the same horizontal straight line 11 on the left and right.

  The three semiconductor light sources 4 are, for example, self-luminous semiconductor light sources (LEDs in this embodiment 1) such as LEDs and EL (organic EL). The three semiconductor light sources 4 include a substrate 12, a light source (not shown) of a light source chip (semiconductor chip) having a small rectangular shape (square shape) fixed to one surface of the substrate 12, and the light emission. And a light transmitting member 13 covering the body. The three semiconductor light sources 4 are attached to the heat sink 8 through the substrate 12.

  The shade 5 is provided integrally with the holder 7. The shade 5 is composed of a light impermeable resin member or the like. The tip of the shade 5 is located at or near the focal point F1 of the first reflecting surface 9. The shade 5 cuts off a part of the reflected light L3 emitted from the semiconductor-type light source 4 and reflected by the second reflecting surface 10 and reflected by the first reflecting surface 9, and the remaining reflected light. A predetermined light distribution pattern having a cut-off line, for example, a light distribution pattern for passing or a light distribution pattern for highways is formed. An edge that forms a cut-off line of the predetermined light distribution pattern is provided at the tip of the shade. The edge of the shade is located at or near the focal point F1 of the first reflecting surface 9.

  The projection lens 6 is fixedly held by the holder 7. The projection lens 6 is an aspheric lens convex lens. The front side (external side) of the projection lens 6 forms a convex aspheric surface, while the rear side (internal side) of the projection lens 6 forms a flat aspheric surface. The projection lens may have a convex aspheric surface with a large curvature (small radius of curvature) on the front side, and a convex aspheric surface with a small curvature (large curvature radius) on the rear side.

  The projection lens 6 includes a lens focal point F3 which is a front focal point (internal focal point) located at a front focus (front focal length) position from the projection lens 6, and a back focal point (rear focal length) from the projection lens 6. ) And a substantially horizontal lens optical axis Z3-Z3 that connects the front focal point lens focal point F3 and the rear focal point. The lens focus F3 of the projection lens 6 is a meridional image plane that is a focal plane on the object space side. In addition, since the light from the semiconductor light source 4 does not have high heat, a resin lens can be used as the projection lens 6. The projection lens 6 uses acrylic in this example. The projection lens 6 projects the predetermined light distribution pattern having the cut-off line, which is the reflected light L3 reflected by the first reflecting surface 9, to the front of the vehicle.

  The holder 7 is composed of a light impermeable resin member or the like. The heat sink 8 is fixedly held on the holder 7. The heat sink 8 is disposed in the vicinity of the projection lens 6. The heat sink 8 is formed by integrally providing a plurality of fins on the front surface of a flat plate at an appropriate interval in the vertical direction. The semiconductor light source 4 is attached to the back surface of the flat plate of the heat sink 8 via the substrate 12.

  The focal point F1 of the first reflecting surface 9 is located at or near the lens focal point F3 of the projection lens 6. The focal points F2 of the three second reflecting surfaces 10L, 10C, and 10R are located at or near the light emitters of the three semiconductor light sources 4. The optical axis Z1-Z1 of the first reflecting surface 9 and the optical axes Z2-Z2 of the three second reflecting surfaces 10L, 10C, 10R are substantially parallel.

  The three semiconductor-type light sources 4 and the three second reflecting surfaces 10L, 10C, and 10R form a pair, and a plurality of, in this example, three pairs.

  The radiation direction of the light L1 from the semiconductor-type light source 4 is the backward direction, and is almost opposite to the irradiation direction of the light L3 from the projection lens 6, that is, the forward direction. The optical axes Z2-Z2 of the three second reflecting surfaces 10L, 10C, 10R are on the opposite side, that is, the rear side of the projection lens 6 with respect to the optical axis Z1-Z1 of the first reflecting surface 9. To position. Furthermore, the optical axis Z1-Z1 of the first reflecting surface 9 and the optical axes Z2-Z2 of the three second reflecting surfaces 10L, 10C, 10R are relative to the lens optical axis Z3-Z3 of the projection lens 6. From the orthogonal state, the semiconductor-type light source 4 intersects in an inclined state toward the projection lens 6 side, that is, in a backward inclined state.

  The vehicular lamp 1 according to the first embodiment is configured as described above, and the operation thereof will be described below.

  First, the light emitters of the three semiconductor-type light sources 4 of the vehicular lamp 1 are turned on and emitted. Then, the light L1 is emitted from the light emitters of the three semiconductor-type light sources 4 to the three second reflecting surfaces 10L, 10C, and 10R on the rear side. The light L1 is reflected by the three second reflecting surfaces 10L, 10C, and 10R to the first reflecting surface 9 side on the upper rear side. Then, reflected light L2 is formed that is substantially parallel to the optical axis Z1-Z1 of the first reflecting surface 9 and the optical axes Z2-Z2 of the three second reflecting surfaces 10L, 10C, and 10R, and parallel to each other. The

  The parallel reflected light L2 is reflected by the first reflecting surface 9. Then, the reflected light L3 is focused (converged) on the focal point F1 of the first reflecting surface 9, that is, the lens focal point F3 of the projection lens 6. A part of the light L3 focused on the focal point F1 of the first reflecting surface 9, that is, the lens focal point F3 of the projection lens 6, is cut off by the shade 5. On the other hand, a predetermined light distribution pattern having a cut-off line is formed by the remaining reflected light L3.

  The remaining reflected light L3 forming a predetermined light distribution pattern having a cut-off line diverges (emits) from the focal point F1 of the first reflecting surface 9, that is, the lens focal point F3 of the projection lens 6, and enters the projection lens 6. The light L3 incident on the projection lens 6 passes through the projection lens 6 and is projected in front of the automobile (vehicle) as predetermined light distribution patterns P1, P2, and P3 shown in FIG. 5 to illuminate the road surface and the like. That is, the right side light distribution pattern P1 is formed by the right side second reflection surface 10R and the semiconductor light source 4, and the middle light distribution pattern P2 is formed by the middle second reflection surface 10C and the semiconductor type light source 4. The left light distribution pattern P3 is formed by the left second reflecting surface 10L and the semiconductor-type light source 4.

  Here, the characteristics of the reflected light L2 from the reflecting surface 10C of the paraboloid of revolution will be described with reference to FIGS. In FIG. 6, the characteristics of the reflected light L2 of the second second reflecting surface 10C will be described. However, the characteristics of the reflected light L2 of the second reflecting surface 10L on the left side and the reflected light of the second reflecting surface 10R on the right side. The characteristic is almost the same as the characteristic of the reflected light L2 of the second second reflecting surface 10C.

  Of the reflecting surface 10C of the rotating paraboloid, a portion (X1 side portion) close to the focal point F2 of the reflecting surface 10C of the rotating paraboloid is located at or near the focal point F2 of the reflecting surface 10C of the rotating paraboloid. The light L1 from the semiconductor-type light source 4 is easily diffused and reflected. That is, as shown in FIG. 7, the diffusion angle θ of the reflected light L2 on the X1 side is large. On the other hand, a portion (X2 side portion) far from the focal point F2 of the reflecting surface 10C of the rotating paraboloid in the reflecting surface 10C of the rotating paraboloid easily collects and reflects the light L1 from the semiconductor light source 4. That is, as shown in FIG. 7, the diffusion angle θ of the reflected light L2 at the portion on the X2 side is small. It is preferable to use a portion in the range from the portion X1 close to the focal point F2 to the portion X2 far from the focal point F2 as the reflecting surface 10C of the paraboloid. At this time, the semiconductor type light emission is performed such that the light L1 having the maximum luminous intensity among the light L1 from the semiconductor type light source 4 enters the portion of the reflecting surface 10C of the rotary paraboloid where the diffusion angle θ of the reflected light L2 is maximum. It is preferable to set the body 4.

  Thus, the portions of the three second reflecting surfaces 10L, 10C, and 10R that are close to the focal point F2 of the three second reflecting surfaces 10L, 10C, and 10R are light L1 from the three semiconductor-type light sources 4. Is easily diffused (diverged) and reflected. In addition, the first reflecting surface 9 easily reflects the diffusely reflected light L2 to the periphery of the projection lens 6. For this reason, it is suitable for forming the peripheral portion of the light distribution pattern that is responsible for the front side irradiation. On the other hand, among the three second reflecting surfaces 10L, 10C, and 10R, portions far from the focal point F2 of the three second reflecting surfaces 10L, 10C, and 10R collect light L1 from the three semiconductor-type light sources 4. Easy to reflect light (focused). In addition, the first reflecting surface 9 easily reflects the condensed reflected light L2 to the central portion of the projection lens 6. For this reason, it is suitable for forming the center part of the light distribution pattern which bears far irradiation.

  In addition, when heat is generated in the semiconductor light source 4 due to the light emission of the light emitter of the semiconductor light source 4, the heat is transmitted to the heat sink 8 and dissipated to the outside air (external) via the heat sink 8. . Moreover, the heat dissipated from the heat sink 8 is transmitted to the projection lens 6 side located near the heat sink 8.

  Furthermore, if the lighting / off of the three semiconductor-type light sources 4 is arbitrarily controlled, the light distribution patterns P1, P2, P3 when all the semiconductor-type light sources 4 are turned on with respect to the non-light distribution pattern when all the semiconductor-type light sources 4 are turned off, and The light distribution patterns P1 and P2 or P1 and P3 or P2 and P3 when the two semiconductor-type light emitters 4 are turned on, and the light distribution pattern P1 or P2 or P3 when one semiconductor-type light source 4 is turned on, respectively. can get.

  The vehicular lamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  In the vehicular lamp 1 according to the first embodiment, when the light L1 from the semiconductor-type light source 4 is reflected by the second reflecting surfaces 10L, 10C, and 10R, the reflected light L2 parallel to each other is formed by the above configuration and operation. When the parallel reflected light L2 is reflected by the first reflecting surface 9, the reflected light L3 converges (converges) on the focal point F3 of the projection lens 6 and diverges (radiates) from the focal point F3 of the projection lens 6. Then, the light is irradiated to the outside of the vehicle through the projection lens 6. As a result, the vehicular lamp 1 according to the first embodiment can constitute a projector-type lamp unit equivalent to a projector-type lamp unit that uses an ellipse or a reflecting surface based on an ellipse. Therefore, the vehicular lamp 1 according to the first embodiment has a predetermined light distribution pattern having a cut-off line, for example, a passing light distribution pattern or a highway, by the shade 5 provided at or near the focal point F3 of the projection lens 6. A light distribution pattern can be formed. In addition, since the vehicular lamp 1 according to the first embodiment does not use an ellipse or a reflecting surface based on an ellipse, the vehicle lamp 1 is more particularly compared with a vehicular lamp using an reflecting surface based on an ellipse or an ellipse. The size in the front-rear direction can be made compact.

  Further, in the vehicular lamp 1 according to the first embodiment, the semiconductor light source 4 and the second reflecting surfaces 10L, 10C, and 10R form a pair, and in this example, three pairs are provided. The amount of light emitted from the projection lens 6 can be increased. Moreover, since the vehicular lamp 1 according to the first embodiment can form the light distribution patterns P1, P2, and P3 for each pair of the semiconductor light source 4 and the second reflecting surfaces 10L, 10C, and 10R, By appropriately turning on / off the plurality of pairs (three pairs) of the semiconductor light sources 4, the light distribution pattern can be easily controlled.

  Further, in the vehicular lamp 1 according to the first embodiment, the portion X1 of the second reflecting surfaces 10L, 10C, and 10R that is close to the focal point F2 of the second reflecting surfaces 10L, 10C, and 10R is a semiconductor due to the above-described configuration and operation. Since the light L1 from the mold light source 4 is easily diffusely reflected, and the first reflecting surface 9 easily reflects the diffusely reflected light L2 to the peripheral portion of the projection lens 6, the peripheral portion of the light distribution pattern responsible for the peripheral front irradiation Suitable for forming. On the other hand, of the second reflecting surfaces 10L, 10C, and 10R, the portion X2 far from the focal point F2 of the second reflecting surfaces 10L, 10C, and 10R easily collects and reflects the light L1 from the semiconductor-type light source 4, and the first reflecting surface. The surface 9 is easy to reflect the condensed reflected light L2 to the central portion of the projection lens 6, and is suitable for forming the central portion of the light distribution pattern responsible for the far-field irradiation.

  Furthermore, in the vehicular lamp 1 according to the first embodiment, heat generated in the semiconductor-type light source 4 is generated by the heat sink 8 at a place other than the semiconductor-type light source 4 on the projection lens 6 side by the above-described configuration and operation. Since the light is transmitted, the light emitting function of the semiconductor light source 4 can be maintained, and the fogging attached to the projection lens 6 can be removed.

  Furthermore, in the vehicular lamp 1 according to the first embodiment, the first reflecting surface 9 is made of a reflecting surface such as a rotating paraboloid or a free-form surface (NURBS curved surface) based on the rotating paraboloid. By increasing the (distance from the focal point F1 on the optical axis Z1-Z1 to the first reflecting surface 9), the light L1 from the semiconductor-type light source 4 arranged in parallel on the horizontal straight line 11 is the second The parallel reflected light L2 from the reflecting surfaces 10L, 10C, and 10R can be sufficiently incident and reflected. As a result, the vehicular lamp 1 according to the first embodiment is the light L1 from the three semiconductor-type light sources 4 laid out at a predetermined position, and the parallel reflected light from the second reflecting surfaces 10L, 10C, and 10R. L2 can be used effectively without waste.

  FIGS. 8-11 shows Example 2 of the vehicle lamp concerning this invention. In the figure, the same reference numerals as those in FIGS. 1 to 7 denote the same components. Hereinafter, the vehicular lamp 100 according to the second embodiment will be described.

  The vehicular lamp 100 according to the second embodiment includes six pairs of the semiconductor light source 4 and the second reflecting surfaces 10L1, 10C1, 10R1, 10L2, 10C2, and 10R2. The six pairs of semiconductor-type light sources 4 and the second reflecting surfaces 0L1, 10C1, 10R1, 10L2, 10C2, and 10R2 are arranged in two pairs of three pairs in the front and rear in the radiation direction of the light L1 from the semiconductor-type light source 4. Is arranged.

  The radiation direction of the light L1 from the six semiconductor-type light sources 4 is the forward direction, and is substantially the same as the irradiation direction of the light L3 from the projection lens 6, that is, the forward direction. Further, the optical axes Z21-Z21, Z22-Z22 of the six second reflecting surfaces 10L1, 10C1, 10R1, 10L2, 10C2, 10R2, that is, the optical axes of the three second reflecting surfaces 10L1, 10C1, 10R1 in the previous stage. Z21-Z21 and the optical axes Z22-Z22 of the second reflecting surfaces 10L2, 10C2, 10R2 at the rear three stages are opposite to the projection lens 6 with respect to the optical axis Z1-Z1 of the first reflecting surface 9 That is, it is located on the rear side. Further, the optical axis Z1-Z1 of the first reflecting surface 9 and the optical axes Z21-Z21, Z22-Z22 of the six second reflecting surfaces 10L1, 10C1, 10R1, 10L2, 10C2, 10R2 are the projection lens 6 The semiconductor-type light source 4 intersects the optical axis Z3-Z3 in an inclined state, that is, in a backward inclined state from the orthogonal state toward the projection lens 6 side.

  Since the vehicular lamp 100 according to the second embodiment is configured as described above, the vehicular lamp 100 has substantially the same operation as the vehicular lamp 1 according to the first embodiment. That is, when each of the six semiconductor-type light sources 4 is turned on and emitted, the light L1 from the six semiconductor-type light sources 4 is respectively directed to the six second reflective surfaces 10L1, 10C1, 10R1, 10L2, 10C2, and 10R2 on the front side. Radiated. When the light L1 is reflected by the six second reflecting surfaces 10L1, 10C1, 10R1, 10L2, 10C2, and 10R2 to the first reflecting surface 9 side on the upper oblique rear side, the light L1 is first reflected as parallel reflected light L2. Reflected by surface 9. Part of this reflected light L3 is cut off by the shade 5, while predetermined light distribution patterns P11, P12, P13, P21, P22, and P23 having a cutoff line are formed by the remaining reflected light L3. As shown in FIG. 11, the predetermined light distribution patterns P11, P12, P13, P21, P22, and P23 having this cut-off line are projected through the projection lens 6 and projected in front of the automobile (vehicle) to illuminate the road surface and the like. To do.

  That is, a substantially diffused left side light distribution pattern P11 indicated by a solid line is formed by the right second reflecting surface 10R1 and the semiconductor light source 4 in the previous stage. The middle second light-reflecting surface 10C1 and the semiconductor-type light source 4 form a substantially diffused middle light distribution pattern P12 indicated by a solid line. The left-side second reflecting surface 10L1 and the semiconductor-type light source 4 in the previous stage form a substantially diffused left-side light distribution pattern P13 indicated by a solid line. Further, the right light distribution pattern P21 of the substantially condensing type indicated by the dotted line is formed by the right second reflecting surface 10R2 and the semiconductor light source 4 at the rear stage. The second light reflecting surface 10C2 in the middle of the latter stage and the semiconductor-type light source 4 form a substantially condensing type middle light distribution pattern P22 indicated by a dotted line. By the second left reflective surface 10L2 and the semiconductor-type light source 4 at the rear stage, a substantially condensing type left light distribution pattern P23 indicated by a dotted line is formed.

  Since the vehicular lamp 100 according to the second embodiment is configured and operated as described above, substantially the same effects as those of the vehicular lamp 1 according to the first embodiment can be achieved. That is, the vehicular lamp 100 according to the second embodiment has a focus F2 on the second reflecting surfaces 10L1, 10C1, 10R1, 10L2, 10C2, and 10R2 among the second reflecting surfaces 10L1, 10C1, 10R1, 10L2, 10C2, and 10R2. The near portion X1 easily diffuses and reflects the light L1 from the semiconductor-type light source 4, and the first reflecting surface 9 easily reflects the diffusely reflected light L2 to the peripheral portion of the projection lens 6. It is suitable for forming the peripheral part of the light pattern. On the other hand, among the second reflecting surfaces 10L1, 10C1, 10R1, 10L2, 10C2, 10R2, a portion X2 far from the focal point F2 of the second reflecting surfaces 10L1, 10C1, 10R1, 10L2, 10C2, 10R2 is the light L1 from the semiconductor-type light source 4. Since the first reflecting surface 9 can easily reflect the condensed reflected light L2 to the central portion of the projection lens 6, it is suitable for forming the central portion of the light distribution pattern responsible for far-field irradiation. ing.

  In addition, the vehicular lamp 100 according to the second embodiment has the semiconductor light source 4 and the second reflecting surfaces 10L1, 10C1, 10R1, 10L2, 10C2, and 10R2 in front and rear in the radiation direction of the light L1 from the semiconductor light source 4. Since it can arrange | position in 2 steps | paragraphs, the pair which consists of the semiconductor type light source 4 and 2nd reflective surface 10L1, 10C1, 10R1, 10L2, 10C2, 10R2 can further be increased. As a result, the vehicular lamp 100 according to the second embodiment can increase the light amount of the light L3 emitted from the projection lens 6, and further provides the light distribution patterns P11, P12, P13, P21, P22, and P23. The light distribution can be finely controlled.

  In the first and second embodiments, an automotive headlamp will be described as a vehicular lamp. However, in the present invention, the vehicle lamp may be a lamp other than the automotive headlamp, for example, a rear combination lamp tail lamp, brake lamp, tail brake lamp, backup lamp, or the like.

  In the first and second embodiments, the example includes three semiconductor light sources 4 and three second reflecting surfaces 10L, 10C, and 10R, and six semiconductor light sources 4 and six second light sources 4L. An example composed of two reflective surfaces 10L1, 10C1, 10R1, 10L2, 10C2, 10R210L, 10C, and 10R will be described. However, in the present invention, the number of semiconductor light sources and second reflecting surfaces is not particularly limited. One may be sufficient.

  Furthermore, in the said Example 1, 2, the predetermined light distribution pattern and auxiliary light distribution pattern which have a cut-off line are irradiated. However, in the present invention, the predetermined light distribution pattern includes a light distribution pattern having no cut-off line, for example, a fog lamp light distribution pattern, a wet road light distribution pattern, a detime lamp light distribution pattern, and a tail lamp distribution. It may be a light pattern, a brake lamp light distribution pattern, a tail / brake lamp light distribution pattern, a backup lamp light distribution pattern, or the like.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows Example 1 of the vehicle lamp concerning this invention. Similarly, it is the II-II sectional view taken on the line in FIG. Similarly, it is the III-III sectional view taken on the line in FIG. Similarly, it is the IV-IV sectional view taken on the line in FIG. 2 and FIG. Similarly, it is explanatory drawing which shows the light distribution pattern obtained by three semiconductor type light sources and three 2nd reflective surfaces. Similarly, it is explanatory drawing which shows the characteristic of the reflected light by the reflective surface of a rotation paraboloid. Similarly, it is explanatory drawing which shows the use range of the reflective surface of a paraboloid of revolution. It is a longitudinal cross-sectional view (vertical cross-sectional view) which shows Example 2 of the vehicle lamp concerning this invention. Similarly, it is a cross-sectional view (horizontal cross-sectional view) showing the main part. Similarly, it is a perspective view which shows a 1st reflector, a 1st reflective surface, a 2nd reflector, a 2nd reflective surface, and a projection lens. Similarly, it is explanatory drawing which shows the light distribution pattern obtained by six semiconductor type light sources and six 2nd reflective surfaces.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,100 Vehicle lamp 2 1st reflector 3 2nd reflector 4 Semiconductor type light source (LED)
5 Shade 6 Projection lens 7 Holder 8 Heat sink 9 First reflecting surface 10L, 10C, 10R, 10L1, 10C1, 10R1, 10L2, 10C2, 10R2 Second reflecting surface 11 Horizontal straight line 12 Substrate 13 Light transmitting member F1 of first reflecting surface Focal point F2 focal point of second reflecting surface F3 focal point of projection lens Z1-Z1 optical axis of first reflecting surface Z2-Z2 optical axis of second reflecting surface Z3-Z3 optical axis of projection lens L1 light from semiconductor light source L2 first 2 Reflected light from the reflecting surface L3 Reflected light from the first reflecting surface P1, P2, P3, P11, P12, P13, P21, P22, P23 Light distribution pattern θ Diffusion angle of reflected light from the second reflecting surface X1 1st The portion of the two reflecting surfaces close to the focal point of the second reflecting surface X2 The portion of the second reflecting surface far from the focal point of the second reflecting surface X3 Range used as the second reflecting surface

Claims (5)

In a vehicle lamp that uses a semiconductor-type light source as a light source,
The semiconductor-type light source;
A projection lens;
A first reflecting surface based on a rotating paraboloid or a rotating paraboloid and having a focal point at or near the focal point of the projection lens;
A second reflecting surface based on a rotating paraboloid or a rotating paraboloid and having a focal point located at or near the semiconductor-type light source;
The optical axis of the first reflecting surface and the optical axis of the second reflecting surface are substantially parallel.
A vehicular lamp characterized by the above. The semiconductor-type light source and the second reflecting surface form a pair, and include a plurality of pairs.
The vehicular lamp according to claim 1. The light emission direction from the semiconductor-type light source is substantially opposite to the light irradiation direction from the projection lens,
The optical axis of the second reflective surface is located on the opposite side of the projection lens with respect to the optical axis of the first reflective surface,
The optical axis of the first reflecting surface and the optical axis of the second reflecting surface intersect with respect to the optical axis of the projection lens in an inclined state where the semiconductor-type light source approaches the projection lens side from an orthogonal state.
The vehicular lamp according to claim 1 or 2. The semiconductor-type light source is provided with a heat sink,
The heat sink is disposed in the vicinity of the projection lens,
The vehicular lamp according to claim 3. The semiconductor-type light source and the second reflecting surface are arranged in two stages in the radiation direction of light from the semiconductor-type light source,
The light emission direction from the semiconductor-type light source is substantially the same as the light irradiation direction from the projection lens,
The optical axis of the second reflective surface is located on the opposite side of the projection lens with respect to the optical axis of the first reflective surface,
The optical axis of the first reflecting surface and the optical axis of the second reflecting surface intersect with respect to the optical axis of the projection lens in an inclined state where the semiconductor-type light source approaches the projection lens side from an orthogonal state.
The vehicular lamp according to claim 1.

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