TW201541020A - Lighting fixture - Google Patents

Abstract

A light fixture including a carrying portion, a transparent lampshade, a light source and a transparent heat sink module is provided. The light fixture has an optical axis. The transparent lampshade is disposed at a first side of the carrying portion. The light source is disposed between the carrying portion and the transparent lampshade. A transmission direction of a first portion of a light beam is opposite to a transmission direction of a second portion of the light beam. The first portion of the light beam leaves the light fixture from the transparent lampshade. At least one portion of a light guide portion of the transparent heat sink module is disposed at a second side of the carrying portion opposite to the first side. The light guide portion has a light incident surface, an outer surface, an inner surface and a light extraction structure. The inner surface is disposed between the outer surface and the optical axis. A second portion of the light beam enters the light guide portion through the light incident surface. The light extraction structure causes the second portion of the light beam leave the light fixture from the outer surface of the light guide portion along a direction far away the optical axis. Heat leaves the light fixture from the light guide portion.

Description

Lamp

This invention relates to an optical component, and more particularly to a luminaire.

Since Thomas. Since Edison invented the incandescent lamp, the world has widely used electric lighting, and has developed a high-brightness and durable lighting device such as a fluorescent lamp. Fluorescent lamps have the advantages of high efficiency and low operating temperature compared to incandescent bulbs. However, fluorescent lamps contain heavy metals (such as mercury), which can cause environmental damage when discarded.

With the development of lighting technology, a more energy-saving and environmentally friendly light source, namely solid-state light-emitting component lamps, has been developed. The solid state light emitting elements in the solid state light emitting device luminaire are, for example, light emitting diodes. The light-emitting diode emits light by combining electrons and holes in the P-N junction. Compared to incandescent or fluorescent lamps, LED lamps have the advantages of low power consumption, high luminous efficiency and long life. In addition, solid-state light-emitting component lamps are more environmentally friendly without the use of heavy metal mercury. However, in the conventional solid-state light-emitting device lamp, since the light-emitting distribution range of the solid-state light-emitting element (for example, the light-emitting diode) is too concentrated, heat accumulation is likely to occur and the heat-dissipating module is required to avoid damage, so that the solid-state light-emitting device is known. Beam emitted by component luminaire It will be limited by the shielding of the thermal module, and will not provide a higher illuminable area than the traditional incandescent lamp. In other words, to provide the same illuminable area, conventional solid state lighting device luminaires are more bulky due to the need to connect additional heat sink modules.

The invention provides a lamp with a light-transmissive heat dissipation module to increase the illuminable area of the lamp and to transmit the light beam in all directions.

A lamp of the present invention comprises a bearing portion, a light-transmitting lamp cover, a light source for emitting a light beam, and a light-transmitting heat dissipation module. The luminaire has an optical axis. The light-transmitting lamp cover is disposed on the first side of the carrying portion. The light source is disposed between the carrying portion and the transparent lamp cover. The direction of travel of the first portion of the beam is opposite to the direction of travel of the second portion of the beam. The first portion of the beam exits the fixture from the light transmissive cover. The light-transmitting heat dissipation module includes a light guiding portion. At least a portion of the light guiding portion is located on a second side of the carrier portion. The first side of the carrier is opposite the second side. The light guiding portion has a light incident surface, an outer surface, an inner surface, and a light extraction structure. The inner surface is located between the outer surface and the optical axis. The second portion of the light beam passes through the light incident surface into the light guiding portion and is transmitted in the light guiding portion. The light extraction structure causes the second portion of the beam to exit the luminaire from the outer surface of the light guide in a direction away from the optical axis. The light guiding portion derives heat generated by the light source.

In an embodiment of the invention, the light incident surface of the light guiding portion is inclined in a direction away from the optical axis.

In an embodiment of the invention, the light incident surface and the vertical direction of the light guiding portion The angle of the reference plane of the optical axis is not more than 45 degrees and not less than 30 degrees.

In an embodiment of the invention, the light source includes a plurality of light emitting units, and the light emitting surfaces of the light emitting units are inclined in a direction away from the optical axis.

In an embodiment of the invention, each of the light emitting units includes a plurality of light emitting elements. Each of the light emitting units has a first first light emitting surface and a second light emitting surface. The first light emitting surface is located between the optical axis and the second light emitting surface.

In an embodiment of the invention, each of the light emitting units includes a carrier substrate. The carrier substrate has opposing first and second surfaces. A portion of the light emitting elements are disposed on the first surface. Another portion of the light emitting element is disposed on the second surface.

In an embodiment of the invention, the light-emitting units are arranged in a ring shape or a radial shape around the optical axis.

In an embodiment of the invention, the carrier substrate of the light emitting unit is a light transmissive substrate.

In an embodiment of the invention, the luminaire further includes a light control element. The light source is disposed between the light control element and the carrying portion, and the light beam is guided to the light guiding portion via the light control element.

In an embodiment of the invention, the light control element is a light diffusing element. The light diffusing element is separated from the light source by a distance.

In an embodiment of the invention, the light control element is a light guide plate. The light guide plate has a convex surface facing the light source. The light beam is convexly guided to the light guiding portion.

In an embodiment of the invention, the convex surface has a radius of curvature of between 200 mm and 350 mm.

In an embodiment of the invention, the light control element is a light guide plate. The light guide plate has a concave surface with respect to the convex surface and a plurality of first microstructures. The convex surface is located between the concave surface and the light source. The concave surface is located between the first microstructure and the convex surface. The first microstructure directs the beam to the top of the light transmissive cover.

In an embodiment of the invention, the light control element is a light guide plate. The light guide plate includes a light transmissive substrate and a plurality of second microstructures facing the light source and disposed on the light transmissive substrate. The second microstructure reflects the beam from the source to form a second portion of the beam.

In an embodiment of the invention, the light-transmitting substrate is disposed perpendicular to the optical axis.

In an embodiment of the invention, the light control element is an optical lens. The optical lens has a reflective surface to separate the beam into a first portion of the beam and a second portion of the beam.

In an embodiment of the invention, the optical lens has a light incident surface, a refractive surface, a reflective surface, and a refractive surface connecting the reflective surface and the light incident surface. The reflecting surface is opposite to the incident surface. The light beam is reflected by the reflecting surface to the refractive surface. The refractive surface refracts the light beam from the reflecting surface to the light guiding portion.

In an embodiment of the invention, the light extraction structure is located on the outer surface and the outer surface is a rough surface.

In an embodiment of the invention, the light guiding portion has a plurality of heat dissipating particles, and the heat emissivity of the light guiding portion is greater than 0.4.

In an embodiment of the invention, the light extraction structure is located in the light guiding portion Internally, and the light extraction structure is a plurality of light scattering particles.

In an embodiment of the invention, the luminaire further includes a sleeve. The light guiding portion surrounds the sleeve, and the optical density of the sleeve is greater than two.

In an embodiment of the invention, the luminaire further includes a driving component electrically connected to the light source, and the driving component is disposed in the sleeve.

In an embodiment of the invention, the lamp further includes a lamp cap and a driving component. The driving component is electrically connected to the light source. The light-transmissive heat dissipation module is located between the light source and the lamp cap. The lamp cap and the light-transmissive heat-dissipating module are connected to the carrying portion to form a space. The drive components are placed in this space.

In an embodiment of the invention, the light guiding portion has a ring structure around the optical axis.

Based on the above, the illuminating device of the embodiment of the present invention can guide the light beam emitted from the light source to the lower half to emit light, and then transmit the light beam in all directions.

The above described features and advantages of the invention will be apparent from the following description.

100A~100H‧‧‧Lights

110‧‧‧Light source

110a‧‧‧Lighting unit

112‧‧‧Loading substrate

112a‧‧‧ first surface

112b‧‧‧ second surface

114‧‧‧Lighting elements

120‧‧‧Lighting cooling module

122‧‧‧Loading Department

124‧‧‧Light Guide

124a‧‧‧Glossy

124b‧‧‧ outer surface

124c‧‧‧ inner surface

130‧‧‧Lighting lampshade

132‧‧‧ top

140‧‧‧Drive components

150‧‧‧ lamp holder

160A~160E‧‧‧Light control components

160a‧‧ ‧ convex

160b‧‧‧ concave

161‧‧‧Into the glossy side

162‧‧‧Transparent substrate

163‧‧‧reflecting surface

164‧‧‧Second microstructure

165‧‧‧Reflective surface

166‧‧‧First microstructure

170‧‧‧ sleeve

D‧‧‧ Direction

F‧‧‧ reference plane

K‧‧‧distance

L‧‧‧beam

L’‧‧‧ first part

L"‧‧‧ Part II

P‧‧‧ particles

R‧‧‧ Space

X‧‧‧ optical axis

Θ‧‧‧ acute angle

1 is a cross-sectional view of a lamp according to an embodiment of the present invention.

2 is a cross-sectional view of a lamp according to an embodiment of the present invention.

3 is a cross-sectional view of a lamp according to an embodiment of the present invention.

4 is a cross-sectional view of a lamp according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a lamp according to an embodiment of the present invention.

Fig. 6 is a cross-sectional view showing a lamp according to an embodiment of the present invention.

Fig. 7 is a cross-sectional view showing a lamp according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view of a lamp according to an embodiment of the present invention.

1 is a cross-sectional view of a lamp according to an embodiment of the present invention. Referring to FIG. 1 , the lamp 100A of the present embodiment includes a light source 110 , a carrying portion 122 , a light-transmitting heat dissipation module 120 , and a light-transmitting lamp cover 130 . The light-transmitting lamp cover 130 is located on the first side of the carrier portion 122. The light source 110 is disposed on the carrying portion 122 , and the light source 110 is disposed between the carrying portion 122 and the transparent cover 130 . The light source 110 is used to emit a light beam L. The light beam L includes a first portion L' and a second portion L" having opposite traveling directions. The first portion L' of the light beam L exits the light fixture 100A from the light-transmitting cover 130. The light-transmitting heat dissipation module 120 includes a light guiding portion 124. At least a portion of the 124 is located on a second side of the carrier 122. The first side of the carrier 122 is opposite the second side.

In the embodiment, the light source 110 is located in the accommodating space defined by the lamp cover 130 and the light guiding portion 124. The light source 110 may include a plurality of light emitting units 110a. The light emitting units 110a are arranged in a ring shape or a radial shape around the optical axis X. Further, the light emitting units 110a may be arranged symmetrically with respect to the optical axis X. Each of the light emitting units 110a may include a carrier substrate 112 and at least one light emitting element 114 (eg, a light emitting diode or other solid state light source) disposed on the carrier substrate 112. Since the carrier substrate 112 faces away from the optical axis X The direction d is inclined, that is, the light-emitting surface of each of the light-emitting units is inclined away from the optical axis X, so that the second portion L" of the plurality of light beams L is transmitted to the light-incident surface 124a of the light-emitting portion 124. The second light beam L After passing through the light incident surface 124a, the portion L" can be emitted from the outer surface 124b after being transmitted for a distance in the light guiding portion 124, thereby further enhancing the optical characteristics of the luminaire 100A.

In the present embodiment, each of the light emitting units 110a may include a plurality of light emitting elements 114. Each of the light emitting units 110a has a first light emitting surface and a second light emitting surface, and the first light emitting surface is located between the optical axis X and the second light emitting surface. The carrier substrate 112 of each of the light emitting units 110a has an opposite first surface 112a and a second surface 112b. The first surface 112a is located between the optical axis X and the second surface 112b. A portion of the light-emitting elements 114 can be disposed on the first surface 112a, and another portion of the light-emitting elements 114 can be disposed on the second surface 112b. In other words, the light emitting unit 110a may be a double-sided light emitting structure. Most of the light beam L emitted by the light-emitting element 114 disposed on the first surface 112a can be transmitted to the top 132 of the light-transmitting cover 130, causing the upper half of the light fixture 100A to emit light. Most of the light beam L emitted by the light-emitting element 114 disposed on the second surface 112b can be transmitted to the light-transmitting heat dissipation module 120, thereby causing the lower portion of the lamp 100A to emit light. Thus, the lamp 100A' can be made to transmit the light beam L in all directions.

In this embodiment, the luminaire 100A further includes a driving component 140, a lamp cap 150 and a sleeve 170 electrically connected to the light source 110. The base 150 is located on the second side of the carrying portion 122. The base 150 and the transparent heat dissipation module 120 are coupled to the carrying portion 122 to form a space R. The sleeve 170 is disposed in the space R and surrounded by the light guiding portion 124. The optical density of the sleeve 170 can be greater than two to provide a shadowing effect. The drive element 140 is disposed in the space R and can be disposed in the sleeve 170 to be shielded by the sleeve 170. Further, the sleeve 170 can have a color, a light reflecting structure, or both. Since the light guiding portion 124 is a light permeable material, the colored sleeve 170 can be observed by the user, thereby adding the aesthetics of the luminaire 100A. In addition, when the sleeve 170 has a light reflecting structure, the light beam L from the inner surface 124c of the light guiding portion 124 away from the light guiding portion 124 can be reflected back into the light guiding portion 124, thereby increasing the light utilization efficiency of the lamp 100A. The light reflecting structure may be a specular reflective layer, a light scattering layer, a sandblasted surface or a microstructured surface. The light-transmissive heat dissipation module 120 is located between the light source 110 and the base 150. Further, by the light guiding portion 124 being in contact with the carrier portion 122, heat from the light source 110 can be conducted from the carrier portion 122 to the light guiding portion 124 to be dissipated. The light guiding portion 124 and the carrying portion 122 may be directly or indirectly connected, as long as heat from the light source 110 can be conducted from the carrying portion 122 to the light guiding portion 124.

In this embodiment, the light guiding portion 124 of the transparent heat dissipation module 120 is a light transmissive material, and the bearing portion 122 can be an opaque material. For example, the material of the light guiding portion 124 may be a light transmissive plastic, such as poly(methyl methacrylate) (PMMA) or polycarbonate (PC). The carrying portion 122 can be an opaque metal core printed circuit board (MCPCB) or a ceramic heat sink substrate. The heat transfer coefficient of the load-bearing portion 122 may be greater than the heat transfer coefficient of the light guide portion 124 such that heat from the light source 110 may be quickly conducted from the load-bearing portion 122 to the light guide portion 124. However, the present invention is not limited thereto. In other embodiments, the light guiding portion 124 and the carrying portion 122 may be other suitable materials, and the carrying portion 122 may also have light transmitting or reflecting characteristics. For example, in another embodiment, The carrying portion 122 may also include the same light transmissive material as the light guiding portion 124. The carrier portion 122 can be integrally formed with the light guiding portion 124, for example, by insert molding technology, to make the lamp 100A easier to assemble.

In order to make the light guiding portion 124 have a better heat dissipation effect, the light guiding portion 124 of the present example has a plurality of heat dissipating particles P, so that the heat emissivity of the light guiding portion 124 can be greater than 0.4. The heat dissipating particles P have both heat dissipation and light scattering properties. The heat dissipating particles P are, for example, ceramic powder having high emissivity, nylon particles or other suitable materials. In addition, when the carrier portion 122 is made of a light transmissive material, the interior thereof may also have heat dissipating particles P.

In the present embodiment, the carrying portion 122 may be a flat plate that is perpendicular to the optical axis X of the luminaire 100A. The light guiding portion 124 may be an annular structure surrounding the optical axis X. The outer surface 124b of the light guiding portion 124 may gradually approach the optical axis X as it moves away from the light source 110. The light guiding portion 124 has an outer surface 124b, an inner surface 124c between the optical axis X and the outer surface 124b, a light incident surface 124a connecting the outer surface 124b and the inner surface 124c, and a light extraction structure. For example, the light extraction structure may be light scattering particles (eg, heat dissipating particles P) located inside the light guiding portion 124. Alternatively, in order to further well control the uniformity of the light beam L exiting from the outer surface 124b of the light guiding portion 124, the outer surface 124b of the light guiding portion 124 may have a microstructure to constitute a light extraction structure. The microstructure can be a regular structure or an irregular structure. Moreover, in other embodiments, the light extraction structure can also be a light scattering coating or film formed on the outer surface 124b of the light guiding portion 124. In this embodiment, the outer surface 124b can be a rough surface to form a light extraction structure. Thereby, the rough outer surface 124b can destroy the total reflection of the light beam L in the light guiding portion 124, and the light beam L is emitted from the outer surface 124b of the light guiding portion 124. In addition, in a variant embodiment, the inner surface of the light guiding portion 124 A specularly reflective coating may be disposed on face 124c to prevent beam L from exiting from inner surface 124c, thereby increasing the light utilization efficiency of luminaire 100A while shielding components disposed in space R, such as drive element 140. Alternatively, a decorative layer may be disposed on the inner surface 124c of the light guiding portion 124, wherein the decorative layer may have an optical density greater than 2 to shield the components disposed in the space R. By providing a specularly reflective coating or decorative layer on the inner surface 124c of the light guiding portion 124, the sleeve 170 can be omitted, thereby reducing the weight and volume of the luminaire 100A. However, the present invention is not limited thereto. In other embodiments, the carrying portion 122 and the light guiding portion 124 may be designed in other suitable forms according to actual needs.

In the present embodiment, the light guiding portion 124 is axially symmetrical with respect to the optical axis X. The second portion L" of the light beam L emitted by the light source 110 is transmitted in the light guiding portion 124. Since the light guiding portion 124 has a light extraction structure (for example, the heat dissipating particles P), the second portion L" of the light beam L can be moved away The direction d of the optical axis X exits the luminaire 100A from the outer surface 124b of the light guiding portion 124. In other words, with the light-transmitting light guiding portion 124, the second portion L" of the light beam L emitted by the light source 110 can enter the light-transmitting heat-dissipating module 120, and further the lower half of the light-emitting device 100A (ie, the first portion of the carrying portion 122) In this way, the upper half of the luminaire 100 (ie, the light-transmitting cover 130 on the first side of the carrying portion 122) and the lower half can emit light, and the illuminable area of the luminaire 100A can be raised.

In the present embodiment, in order to allow more light beams L to enter the light guiding portion 124, the light incident surface 124a of the light guiding portion 124 may be inclined in a direction d away from the optical axis X. In other words, the light incident surface 124a is inclined with respect to the carrier portion 122 and faces the optical axis X and faces away from the base 150. Through the obliquely disposed light incident surface 124a, the second portion L" of the light beam L can be deflected to increase the amount of total reflection of the second portion L" of the light beam L at the light guiding portion 124. Such as As a result, the light-emitting area and the brightness of the light guiding portion 124 can be increased, thereby increasing the utilization ratio of the second portion L" of the light beam L. In this embodiment, the reference plane F is perpendicular to the optical axis X, and the light-incident surface 124a An acute angle θ may be interposed in the light guiding portion 124 with the reference plane F. In the embodiment, the acute angle θ may be not less than 30 degrees and not more than 45 degrees. However, the present invention is not limited thereto, and the magnitude of the acute angle θ may be visually visible to the light source 110. The light-emitting characteristics and the relative positions of the light source 110 and the light guiding portion 124 are appropriately designed.

It should be noted that the spirit of the present invention is to use a light guiding portion of the light-transmitting heat-dissipating module to guide the light beam to the lower half of the lamp to emit light, thereby realizing the overall lighting. Achieving the above effects is not limited to whether the light guiding portion has an inclined light incident surface or other optional additional features. In other embodiments, the luminaire can utilize other suitable forms of light source, interaction of the light source with other components, or other suitable means to match the light-transmissive heat dissipation module to achieve overall illumination. The following will be exemplified using FIGS. 2 to 9.

2 is a cross-sectional view of a lamp according to an embodiment of the present invention. Referring to FIG. 2, the luminaire 100B is similar to the luminaire 100A, and thus the same elements are denoted by the same reference numerals. The main difference between the luminaire 100B and the luminaire 100A is that the carrier substrate 112 of the illuminating unit 110a can be a transparent substrate, and the illuminating elements 114 can be disposed on the first surface 112a of the carrier substrate 112. A portion of the light beam L of the light-emitting element 114 can be transmitted to the top 132 of the light transmissive cover 130 to form a first portion L' of the light beam L. The first portion L' of the light beam L causes the upper half of the luminaire 100B to illuminate. The other part of the light beam L of the light-emitting element 114 can be transmitted to the light guiding portion 124 through the light-transmitting carrier substrate 112 to form a second portion L" of the light beam L. The second portion L" of the light beam L can be guided The light portion 124 is emitted to cause the lower half of the lamp 100B to emit light to enhance the illuminable surface of the lamp 100B. product.

3 is a cross-sectional view of a lamp according to an embodiment of the present invention. Referring to FIG. 3, the luminaire 100C is similar to the luminaire 100B, and thus the same elements are denoted by the same reference numerals. The main difference between the luminaire 100C and the luminaire 100B is that the luminaire 100C further includes the light control element 160A, and the illuminating element 114 of the light source 110 is disposed on the carrying portion 122. That is, the light emitting surface of the light source 110 faces the top 132 of the light transmissive cover 130. In this embodiment, the light source 110 is disposed between the light control element 160A and the carrying portion 122. The light control element 160A may be a light diffusing element such as a light diffusing plate to which a diffusing agent is added as a polycarbonate or a matte surface having a sandblasting surface, but is not limited thereto. Light control element 160A is separated from light source 110 by a distance k. The partial light beam L emitted by the light source 110 can be reflected by the light control element 160A and transmitted to the light guiding portion 124 to constitute a second portion L" of the light beam L. The second portion L" of the light beam L can be made by the light guiding portion 124. The outer surface 124b exits, thereby causing the lower half of the luminaire 100C to illuminate. Another portion of the light beam L emitted by the light source 110 can pass through the light control element 160A to form a first portion L' of the light beam L. The first portion L' of the light beam L passes through the light control element 160A and is transmitted to the light-transmitting cover 130, thereby causing the upper half of the lamp 100C to emit light. In this way, the illuminable area of the luminaire 100C can be significantly increased, thereby illuminating in all directions.

4 is a cross-sectional view of a lamp according to an embodiment of the present invention. Referring to FIG. 4, the luminaire 100D is similar to the luminaire 100C, and thus the same elements are denoted by the same reference numerals. The main difference between the luminaire 100D and the luminaire 100C is that the light control element 160B of the luminaire 100D is a light guide plate. The light control element 160B includes a light transmissive substrate 162 and a plurality of second microstructures 164 that face the light source 110 and are disposed on the light transmissive substrate 162. Light-transmitting base The plate 162 can be disposed perpendicular to the optical axis X. The second microstructure 164 reflects or partially refracts the light beam L from the light source 110 to form a second portion L" of the light beam L. The second portion L" of the light beam L is reflected by the second microstructure 164 and can be transmitted to The light guiding portion 124 of the light dissipation module 120. In particular, the second microstructure 164 can cause the second portion L" of the light beam L to exit the light control element 160B at a larger angle of reflection, thereby increasing the probability of the light beam L entering the light guide portion 124, thereby enhancing the optical characteristics of the luminaire 100D.

In the luminaire 100D, the cross section of the second microstructure 164 may be curved. However, the invention is not limited thereto, and in other embodiments, the cross section of the second microstructure 164 may also have other suitable shapes. FIG. 5 is a cross-sectional view of a lamp according to an embodiment of the present invention. Referring to FIG. 5, the luminaire 100E is similar to the luminaire 100D, and thus the same elements are denoted by the same reference numerals. In the luminaire 100E, the second microstructure 164 may have a triangular cross section.

Fig. 6 is a cross-sectional view showing a lamp according to an embodiment of the present invention. Referring to Figure 6, the luminaire 100F is similar to the luminaire 100C, and thus the same elements are denoted by the same reference numerals. The main difference between the luminaire 100F and the luminaire 100C is that the light control element 160C of the luminaire 100F is different from the light control element 160A of the luminaire 100C. In the luminaire 100F, the light control element 160C has a convex surface 160a facing the light source 110. Alternatively, the light control element 160C may also have a concave surface 160b with respect to the convex surface 160a. Alternatively, the light control element 160C may itself be added with a diffusing agent or its convex surface 160a may be a sandblasted surface or a second microstructure as disclosed in FIG. 4 or FIG. 5, thereby having light diffusion or light guiding effect. Through the convex surface 160a, the light control element 160C can reflect a part of the light beam L emitted by the light source 110 to form a second portion L" of the light beam L. The second portion L" of the light beam L is The convex surface 160a is reflected and transmitted to the light guiding portion 124 of the light-transmitting heat dissipation module 120, thereby further illuminating the lower half of the lamp 100F. In particular, the convex surface 160a can cause the light beam L to leave the light control element 160C at a large reflection angle, and increase the probability that the light beam L enters the light guiding portion 124, thereby improving the optical characteristics of the light fixture 100F. In FIG. 6, the convex surface 160a may have a radius of curvature of between 200 mm and 350 mm. However, the present invention is not limited thereto, and the radius of curvature of the convex surface 160a may be appropriately designed according to actual needs.

Fig. 7 is a cross-sectional view showing a lamp according to an embodiment of the present invention. Referring to Figure 7, the luminaire 100G is similar to the luminaire 100F, and thus the same elements are denoted by the same reference numerals. The main difference between the luminaire 100G and the luminaire 100F is that, in FIG. 7, the light control element 160D has a concave surface 160b with respect to the convex surface 160a and a plurality of first microstructures 166 in addition to the convex surface 160a. The convex surface 160a is located between the concave surface 160b and the light source 110. The concave surface 160b is located between the first microstructure 166 and the convex surface 160a. The light control element 160D is located between the top 132 of the light transmissive cover 130 and the light source 110. A portion of the light beam L emitted by the light source 110 can be transmitted to the top portion 132 of the light transmissive cover 130 via the guidance of the first microstructure 166 to form a first portion L' of the light beam L. It is worth mentioning that the light control element 160D can guide the second portion L′ of the light beam L to the light guiding portion 124 of the light-transmitting heat dissipation module 120, and the first microstructure 166 of the light control element 160D can be further The first portion L' of the light beam L is evenly dispersed to the top 132 of the light transmissive cover 130 to further enhance the optical characteristics of the luminaire 100G. In this embodiment, the cross section of the first microstructure 166 may be curved. The invention is not limited thereto. In other embodiments, the cross section of the first microstructure 166 may also have other suitable shapes, such as a triangle.

FIG. 8 is a cross-sectional view of a lamp according to an embodiment of the present invention. Referring to Figure 8, the luminaire 100H is similar to the luminaire 100C, and thus the same elements are denoted by the same reference numerals. The main difference between the luminaire 100H and the luminaire 100C is that the light control element 160E of the luminaire 100H is an optical lens. The light control element 160E has a light incident surface 161 facing the light source 110, a reflective surface 163 with respect to the light incident surface 161, and a refractive surface 165 connecting the reflective surface 163 and the light incident surface 161. The reflecting surface 163 of the light control element 160E can separate the light beam L into the first portion L' of the light beam L and the second portion L" of the light beam L. In detail, the partial light beam L emitted by the light source 110 can be reflected by the reflecting surface 163 to The face 165 is refracted to form a second portion L" of the beam L. The refracting surface 165 can refract the second portion L" of the light beam L from the reflecting surface 163 to the light guiding portion 124 of the light-transmitting heat dissipation module 120, thereby causing the lower half of the luminaire 100H to emit light. The other portion of the light source 110 emits The portion of the light beam L can pass through the reflecting surface 163 to form a first portion L' of the light beam L. The first portion L' of the light beam L exits the luminaire 100H by the light-transmitting lamp cover 132, thereby causing the upper half of the luminaire 100H to emit light.

In the embodiment of FIG. 2 to FIG. 8 , the light incident surface 124 a of the light guiding portion 124 can have a design inclined as shown in FIG. 1 away from the optical axis X as needed, thereby improving the second portion of the light beam L. The amount of L" transmitted at the light guiding portion 124 is totally reflected.

In summary, the illuminating device of the present invention can guide the light beam emitted from the light source to the lower half to emit light, and then emit light in all directions. The light-transmitting heat-dissipating module has the function of guiding light and dissipating heat by adding heat-dissipating particles to the light-guiding portion of the light-transmitting heat-dissipating module. By arranging the light-emitting surface of the light source obliquely or adding a light-control element, the light beam emitted by the light source can be separated into the first part and the opposite direction of the traveling direction. Two parts. By the oblique arrangement of the light incident surface of the light guiding portion, the amount of total reflection of the second portion of the light beam in the light guiding portion can be increased.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100A‧‧‧Lamps

110‧‧‧Light source

110a‧‧‧Lighting unit

112‧‧‧Loading substrate

112a‧‧‧ first surface

112b‧‧‧ second surface

114‧‧‧Lighting elements

120‧‧‧Lighting cooling module

122‧‧‧Loading Department

124‧‧‧Light Guide

124a‧‧‧Glossy

124b‧‧‧ outer surface

124c‧‧‧ inner surface

130‧‧‧Lighting lampshade

132‧‧‧ top

140‧‧‧Drive components

150‧‧‧ lamp holder

170‧‧‧ sleeve

D‧‧‧ Direction

F‧‧‧ reference plane

L‧‧‧beam

L’‧‧‧ first part

L"‧‧‧ Part II

P‧‧‧ particles

R‧‧‧ Space

X‧‧‧ optical axis

Θ‧‧‧ acute angle

Claims (24)

A lamp having an optical axis, the lamp comprising: a bearing portion; a light-transmitting lamp cover disposed on a first side of the carrying portion; a light source for emitting a light beam, wherein the light source is disposed on the carrying portion Between the transparent light covers, a first portion of the light beam travels in a direction opposite to a second portion of the light beam, and the first portion of the light beam exits the light fixture from the light transmissive cover; and a light transmissive heat sink The group includes: a light guiding portion, at least a portion of the light guiding portion is located on a second side of the carrying portion, the first side of the carrying portion is opposite to the second side, and the light guiding portion has a light incident surface An outer surface, an inner surface and a light extraction structure, the inner surface being located between the outer surface and the optical axis, the second portion of the light beam entering the light guiding portion via the light incident surface at the light guiding Passing in the portion, and the light extraction structure causes the second portion of the light beam to exit the luminaire from the outer surface of the light guiding portion in a direction away from the optical axis, the light guiding portion deriving heat generated by the light source . The luminaire of claim 1, wherein the light incident surface of the light guiding portion is inclined away from the optical axis. The luminaire of claim 2, wherein an angle between the light incident surface of the light guiding portion and a reference plane perpendicular to the optical axis is no more than 45 degrees and not less than 30 degrees. The luminaire of claim 1, wherein the light source comprises a plurality of light emitting units, and a light emitting surface of each of the light emitting units is inclined away from the optical axis. The luminaire of claim 4, wherein each of the illuminating units comprises a plurality of illuminating elements, each illuminating unit having a first illuminating surface and a second illuminating surface, wherein the first illuminating surface is located at the optical axis Between the second light emitting surface. The luminaire of claim 5, wherein each of the illuminating units comprises a carrier substrate having a first surface and a second surface, and the plurality of illuminating elements are disposed on the first surface And the other part of the light emitting elements are disposed on the second surface. The luminaire of claim 4, wherein the illuminating units are arranged in a ring shape or a radial shape around the optical axis. The luminaire of claim 4, wherein the carrier substrate of each of the light-emitting units is a light-transmitting substrate. The luminaire of claim 1, further comprising: a light control element disposed between the light control element and the carrying portion, and the light beam is guided to the light guiding portion via the light control element. The luminaire of claim 9, wherein the light control element is a light diffusing element, and the light diffusing element is spaced apart from the light source. The luminaire of claim 9, wherein the light control element is a light guide plate having a convex surface facing the light source, and the light beam is guided to the light guide portion by the convex surface. The luminaire of claim 11, wherein the curvature of the convex surface The radius is between 200 mm and 350 mm. The luminaire of claim 11, wherein the light control element is a light guide plate having a concave surface with respect to the convex surface and a plurality of first microstructures, the convex surface being located at the concave surface and the light source The concave surface is located between the first microstructures and the convex surface, and the first microstructures guide the light beam to a top of the transparent light cover. The luminaire of claim 9, wherein the light control element is a light guide plate, the light guide plate comprises a light transmissive substrate, and a plurality of second microstructures facing the light source and disposed on the light transmissive substrate, The second microstructures reflect the beam from the source to form the second portion of the beam. The luminaire of claim 14, wherein the transparent substrate is disposed perpendicular to the optical axis. The luminaire of claim 9, wherein the light control element is an optical lens having a reflective surface to separate the light beam into the first portion of the light beam and the second portion of the light beam. The illuminating device of claim 16, wherein the optical lens has a light incident surface, the reflective surface, and a refractive surface connecting the reflective surface and the light incident surface, the reflective surface being opposite to the light incident surface, The light beam is reflected by the reflective surface to the refractive surface, and the refractive surface refracts the light beam from the reflective surface to the light guiding portion. The luminaire of claim 1, wherein the light extraction structure is located on a rough surface of the outer surface. The luminaire of claim 1, wherein the light guiding portion has a plurality of heat dissipating particles, and the light emissivity of the light guiding portion is greater than 0.4. The luminaire of claim 1, wherein the light extraction structure is located inside the light guiding portion, and the light extraction structure is a plurality of light scattering particles. The luminaire of claim 1, further comprising a sleeve, the light guiding portion surrounding the sleeve, and the optical density of the sleeve is greater than 2. The luminaire of claim 21, further comprising a driving component electrically connected to the light source, wherein the driving component is disposed in the sleeve. The luminaire of claim 1, further comprising a lamp cap and a driving component, wherein the driving component is electrically connected to the light source, the transparent heat dissipating module is located between the light source and the lamp cap, and the lamp cap, The light-transmitting heat dissipation module is connected to the bearing portion to form a space, and the driving component is disposed in the space. The luminaire of claim 1, wherein the light guiding portion surrounds the optical axis and has a ring structure.