TWI409411B - Led light source module - Google Patents

Abstract

A LED light source module includes a first LED and a light guide member. The light guide member includes a hollow main body. The main body includes a first bottom surface, a second bottom surface opposite to the first bottom surface, and a side wall. The side wall is connected to the first bottom surface and the second bottom surface. A microstructure is formed on the sidewall. A first lens is located in the main body which extends from the first bottom surface to the direction of the second bottom surface. The first lens includes a first reflecting surface and a first refracting surface connected to the first reflecting surface. The first LED faces towards the first lens. The light emitted from the first LED is transmitted by the first lens, and finally exits the side wall of the light guide member. Thus the angle of the light is adjusted and the uniform side-emitting LED light source module is provided.

Description

Light-emitting diode light source module

The present invention relates to the field of optical systems, and in particular, to an edge-lit LED light source module.

At present, Light Emitting Diode (LED) has been widely used in many fields due to its low power consumption, long life, small size and high brightness. A novel light-emitting diode can be found in Daniel A. Steigerwald et al., IEEE Journal on Selected Topics in Quantum Electronics, Vol. 8, No. 2, March/April 1102, Illumination With Solid State Lighting Technology.

The light-emitting diode light source module can be divided into a direct type and a side light type according to the distribution position of the semiconductor light-emitting element LED. Because the direct type module is thicker, it does not conform to the trend of light and thin. Therefore, at present, it is mainly based on the sidelight type. For the edge-lit LED light source module, the semiconductor light-emitting element LED is usually disposed on one side of the light guide plate, and the light guide plate breaks the reflection condition of the light through the diffusion point of the bottom surface, so that the light is emitted from the front surface of the light guide plate, so that the light guide The light board emits light uniformly. In order to cooperate with the edge-lit LED light source module, a microlens can usually be arranged above the LED, and the light emitted by the LED is guided to the light guide plate through the microlens to improve the light utilization rate, but the LED is easily emitted. The light is uneven.

In view of this, it is necessary to provide a side light type light emitting diode light source module with uniform light output.

A light-emitting diode light source module includes: a first light-emitting diode, a light guide body, the light guide body includes a hollow body, the body has a first bottom surface and a second bottom surface opposite thereto a side surface connecting the first bottom surface and the second bottom surface, wherein the side surface is formed with a microstructure, the first bottom surface extending toward the second bottom surface and a first lens body located inside the body, the first lens body a first reflective surface and a first refractive surface connected to the first reflective surface, the first light emitting diode is disposed opposite to the first lens body of the light guide body, and the light emitted by the first light emitting diode From the first bottom surface into the first lens body, the light incident on the first reflecting surface is reflected to the first refractive surface, and finally emitted from the side surface of the body.

Compared with the prior art, the light-emitting diode light source module uses the first lens body to emit light emitted from the light-emitting diode from the side of the body of the light guide body, and can change the angle of the light to make it parallel to form a side. Light source to achieve uniform light output.

100, 200, 300, 400, 500‧‧‧Lighting diode light source module

11, 51‧‧‧ first light-emitting diode

12‧‧‧Light guide

122‧‧‧ body

14, 24, 34, 44, 54‧‧‧ first lens body

126, 226, 326, 426, 526‧‧ first floor

124, 524‧‧‧ second bottom surface

128‧‧‧ side

1282‧‧‧Microstructure

144, 244, 342, 442‧‧‧ first reflective surface

142, 242‧‧‧ second reflecting surface

143, 243‧‧‧second refractive surface

145, 245, 343, 443‧‧‧ first refractive surface

146, 346‧‧‧ third refractive surface

148‧‧‧Into the glossy surface

82, 80, 84‧‧‧ rays

55‧‧‧second lens body

52‧‧‧Second light-emitting diode

1 is a perspective view showing the structure of a light-emitting diode light source module according to a first embodiment of the present invention.

Figure 2 is a schematic cross-sectional view of Figure 1 taken along the line II-II.

Figure 3 is a light path diagram of Figure 2.

4 is a cross-sectional view showing a light emitting diode light source module according to a second embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a light emitting diode light source module according to a third embodiment of the present invention.

6 is a cross-sectional view showing a light emitting diode light source module according to a fourth embodiment of the present invention.

7 is a cross-sectional view showing a light emitting diode light source module according to a fifth embodiment of the present invention.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 2 , a first embodiment of the present invention provides a light emitting diode light source module 100 . The light emitting diode light source module 100 includes a first light emitting diode 11 and a light guide body 12 .

The light guide body 12 has a central axis OO', and the first light-emitting diode 11 is disposed on the central axis OO'. The light guide body 12 includes a hollow body 122 and a first lens body 14 received in the body. The first light-emitting diode 11 is disposed opposite to the first lens body 14. The body 122 is integral with the first lens body 14. The body 122 has a cylindrical shape and has a first bottom surface 126, a second bottom surface 124 opposite thereto, and a side surface 128. The side surface 128 connects the first bottom surface 126 and the second bottom surface 124. The side surface 128 is used to adjust the light emission. The angle and the radiation distribution characteristics of the outgoing light cause the beam to become parallel light. In the embodiment, the side surface 128 is further provided with a microstructure 1282 which is an arc-shaped protrusion which is in the same direction as the light exiting direction. It can be understood that the microstructure 1282 can also be other shapes, such as a pyramid shape, a zigzag protrusion, a zigzag groove or an arcuate groove. The light guide body 12 is made of a transparent material, which may be polymethyl acrylate, polycarbonate or carbonic acid acrylic acid, and has a refractive index ranging from 1.35 to 1.7.

The first bottom surface 126 extends toward the second bottom surface 124 and a first lens body 14 is located inside the body 122. The first lens body 14 includes a first reflective surface 144 and a second reflection. a second refracting surface 143 connecting the first reflecting surface 144 and the second reflecting surface 142, a first refracting surface 145 connecting the first reflecting surface 144, connecting the first refracting surface 145 and the first surface The third refractive surface 146 of the bottom surface 126 and a light incident surface 148. The light incident surface 148 is a spherical surface formed by the first bottom surface 126 recessed inward along the axis OO' thereof, and the first light emitting diode 11 is disposed at the recess. It can be understood that the first light-emitting diode 11 can also directly use the first bottom surface 126 as a light-incident surface. The shape of the first reflecting surface 144 and the second reflecting surface 142 is the inner surface shape of the funnel. The first reflecting surface 144 and the second reflecting surface 142 are all total reflection surfaces. Preferably, the surface of the first reflective surface 144 and the second reflective surface 142 may be provided with a reflective layer (not shown), which prevents light from directly exiting from the reflective surface and reduces the light intensity.

Referring to FIG. 3, when the light 82 emitted from the first LED 11 is incident on the first reflecting surface 144 by the light incident surface 148, most of the light is reflected due to the total reflection of the first reflecting surface 144. The first refractive surface 145 is refracted by the first refractive surface 145 and incident on the side surface 128 at an angle that the microstructures 1282 of the side surface 128 change the angle of the light rays 82 to exit in parallel. Similarly, when the light 80 emitted from the first LED 11 is transmitted from the light incident surface 148 to the second reflective surface 142, most of the light is reflected to the second refraction due to the total reflection of the second reflective surface 142. The face 143 is refracted by the second refractive surface 143 and incident on the side 128 at a certain angle. The microstructure 1282 of the side 128 changes the angle of the light 80 to exit in parallel. When the light 84 is incident directly from the light incident surface 148 to the third refractive surface 146, it is refracted by the third refractive surface 146 and incident on the side surface 128 at a certain angle. The microstructure 1282 of the side surface 128 changes the angle of the light 84. Make it come out in parallel.

Referring to FIG. 4, a second embodiment of a light emitting diode module 200 and a first embodiment of the present invention The light-emitting diode light source module 100 of the embodiment is substantially similar, and the first lens body 24 includes a first reflective surface 244, a second reflective surface 242, a first reflective surface 244, and a second reflective surface 244. The second refractive surface 243 of the reflective surface 242 and the first refractive surface 245 connecting the first reflective surface 244 and the first bottom surface 226.

Referring to FIG. 5, the LED body module 300 of the third embodiment of the present invention is substantially similar to the LED body module 100 of the first embodiment, except that the first lens body 34 includes a first A reflective surface 342, a third refractive surface 346, and a first refractive surface 343 connecting the first reflective surface 342 and the third refractive surface 346. The third refractive surface 346 is connected to the first bottom surface 326.

Referring to FIG. 6 , the LED light source module 400 of the fourth embodiment of the present invention is substantially similar to the LED light source module 100 of the first embodiment, and the difference is that the first lens body 44 includes a first A reflecting surface 442 and a first refractive surface 443 connecting the first reflecting surface 442 and the first bottom surface 426.

Referring to FIG. 7 , the LED light source module 500 of the fifth embodiment of the present invention is substantially similar to the LED light source module 100 of the first embodiment, and includes a first lens body 54 and a first light emitting diode. Body 51. The difference is that the LED light source module 500 further includes a second lens body 55 extending from the second bottom surface 524 toward the first bottom surface 526 and disposed opposite the second lens body 55. The second light-emitting diode 52 has a vertically symmetrical structure with the first lens body 54 and the second lens body 55.

Compared with the prior art, the LED light source module 100, 200, 300, 400 or 500 uses the first lens body 14, 24, 34, 44, 54 or the second lens body 55 to illuminate the LED 11, Light emitted by 51 or 52 is emitted from the side 128 of the body 122 of the light guide body 12. Under the action of the micro-structure 1282 of the arc-shaped protrusion of the side surface 128, the angle of the light can be changed to be emitted in parallel to form a side-light source to achieve uniform light output.

In summary, the present invention conforms to the requirements of the invention patent, and proposes a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

100‧‧‧Lighting diode light source module

11‧‧‧First Light Emitting Diode

126‧‧‧ first bottom surface

128‧‧‧ side

1282‧‧‧Microstructure

144‧‧‧First reflecting surface

142‧‧‧Second reflective surface

143‧‧‧second refractive surface

145‧‧‧First refractive surface

146‧‧‧ Third refractive surface

148‧‧‧Into the glossy surface

82, 80, 84‧‧‧ rays

Claims (11)

A light-emitting diode light source module includes: a first light-emitting diode, wherein the light-emitting diode light source module further comprises a light guide body, wherein the light guide body comprises a hollow body, The main body has a first bottom surface, a second bottom surface opposite thereto, and a side surface connected to the first bottom surface and the second bottom surface, wherein the side surface is formed with a microstructure, and the first bottom surface extends toward the second bottom surface a first lens body inside the body, the first lens body includes a first reflective surface and a first refractive surface connected to the first reflective surface, the first light emitting diode and the first lens body of the light guide body Oppositely, the light emitted by the first light emitting diode enters the first lens body from the first bottom surface, and the light incident on the first reflecting surface is reflected to the first refractive surface, and finally is emitted from the side of the body. . The light-emitting diode light source module of claim 1, wherein the microstructure is an arc-shaped protrusion, and the protrusion direction is consistent with an outgoing direction of the light. The illuminating diode light source module of claim 1, wherein the first lens body is integrally formed with the body. The light-emitting diode light source module of claim 1, wherein the body has a cylindrical shape. The light emitting diode light source module of claim 1, wherein the light emitting diode light source module further comprises a second lens extending from the second bottom surface toward the first bottom surface and located inside the body And a second light-emitting diode disposed opposite to the body, the first lens body and the second lens body have a vertically symmetrical structure. The light emitting diode light source module according to claim 1, wherein the hair source The light diode module further includes a second reflective surface and a second refractive surface, the second refractive surface being coupled to the first reflective surface, the second reflective surface being coupled to the second refractive surface. The illuminating diode light source module of claim 6, wherein the first reflecting surface, the second reflecting surface, the first refracting surface and the second refracting surface are based on a central axis of the light guiding body The symmetrical structure of the shaft. The light-emitting diode light source module of claim 6, wherein the first reflective surface and the second reflective surface are total reflection surfaces. The illuminating diode light source module of any one of the first to eighth embodiments, wherein the illuminating diode light source module further includes a third refracting surface, the third refracting surface is connected to the first a refractive surface and the first bottom surface. The light-emitting diode light source module of claim 1, wherein the first reflecting surface has a shape of an inner surface of the funnel. The illuminating diode light source module of claim 1, wherein the first illuminating diode is disposed on a central axis of the light guiding body.