TWI427243B - Lighting module - Google Patents

Description

Light source module

The present invention relates to a light guiding element, and more particularly to an optical light guiding element which can effectively improve the edge outgoing light.

Referring to FIG. 1A and FIG. 24B, respectively, a perspective view and a cross-sectional view of a conventional light source module are shown. The light source module 90 includes a light guide plate 92 and a plurality of light emitting units 95. The light guide plate 92 includes a light incident surface 920, a light exit surface 922, a bottom surface 924, and a rear end surface 926. The light incident surface 920 is provided with the light emitting units 95, and the light emitting units 95 respectively project light toward the light incident surface 920. The light-emitting surface 922 is adjacent to the light-incident surface 920. The bottom surface 924 is adjacent to the light-incident surface 920 and has an angle with the light-emitting surface 922. The rear surface 926 is adjacent to the light-emitting surface 922. And the bottom surface 924.

The bottom surface 924 is provided with a plurality of light guiding units 925 for effectively guiding the light incident on the light guide plate 92 to the rear end surface 926, wherein the distribution density of the light guiding unit 925 is received by the set position thereof. The light intensity of the light-emitting units 95 is proportional, that is, the smaller the received light intensity, the relative density of the light-guiding unit 925 corresponding to the light intensity is relatively increased.

The light guiding unit 925 can adjust the brightness of the light guide plate 92, and effectively guide the light incident by the light emitting unit 95 to any corner of the light guide plate 92, thereby making the light output. The face 922 is illuminated with uniform brightness. In order to illuminate the light-emitting surface 922 with uniform brightness, the light guide plate 92 necessarily directs the light projected by the light-emitting unit 95 from the light-incident surface 920 into the light guide plate 92 to guide the light guide plate 92 adjacent to the rear end surface as much as possible. In the position of 926, since the rear end surface 926 is not provided with the light guiding unit 925 to adjust the light, part of the light directly reflects the light through the rear end surface, so that the light intensity of the rear end surface 926 is significantly larger than the light emitting surface. The light intensity of 922 causes the generation of a light line at an edge; and when the light guide plate 92 is spliced, the intersection of the adjacent two light guide plates 92 produces a visible bright line of stitching, which affects the overall light source. The uniformity of the light output of the module.

In view of the foregoing, it is an object of the present invention to provide a light source module that includes at least one light emitting unit and a light guiding element, and the light guiding element and the light emitting unit together define an effective light exiting area. The light guiding body comprises a light incident surface, a light exit surface, a bottom surface, a rear end surface and a first edge region. The light-incident surface is provided with the light-emitting unit, and the light-emitting unit respectively projects light toward the light-incident surface; the light-emitting surface is adjacent to one side of the light-incident surface; the bottom surface is disposed at a corresponding effective light-emitting area a plurality of light guiding units having a first set depth; the rear end surface is adjacent to the light incident surface and the bottom surface; the first edge region is between the effective light emitting region and the rear end surface And the bottom surface is provided with at least one first optical microstructure having a second set depth at the corresponding first edge region.

According to an embodiment of the invention, the second set depth is greater than the first set depth.

According to an embodiment of the invention, wherein the first optical microstructure is arranged at a density It is larger than the set density of the light guiding unit.

According to an embodiment of the invention, the distribution density of the light guiding units is proportional to the distance between the set positions and the light emitting unit.

In addition, the present invention further provides a light source module, the light source module includes a plurality of light emitting units and a plurality of light guiding elements, each of the light guiding elements includes a light guiding body, and the light guiding system is defined together with the light emitting units An effective light exit area. The light guiding body comprises a light incident surface, a light exit surface, a bottom surface, a rear end surface, a first edge region and a second edge region. The light-incident surface is provided with the light-emitting units, and the light-emitting units respectively project light toward the light-incident surface; the light-emitting surface is adjacent to one side of the light-incident surface; the bottom surface is opposite to the light-emitting surface The light-emitting mask is inclined at an angle, and the bottom surface is provided with a plurality of light guiding units having a first set depth at a corresponding effective light-emitting area; the rear end surface is opposite to the light-incident surface and adjacent to the light-emitting surface a bottom surface between the effective light exiting region and the rear end surface, the bottom surface being provided with at least one first optical microstructure having a second set depth at the corresponding first edge region; the second An edge region is interposed between the first edge region and the rear end surface, and the bottom surface is disposed at a second edge portion corresponding to the second optical microstructure; wherein each of the light guiding elements The rear end surface is flatly attached to the light incident surface of the adjacent light guiding elements such that the light emitting surfaces of the adjacent two light guiding elements are located at the same horizontal plane.

According to an embodiment of the invention, the second set depth is greater than the first set depth, and the third set depth is greater than the second set depth.

According to an embodiment of the present invention, wherein the first optical microstructure has a set density greater than a set density of the light guiding unit, the second optical microstructure has a set density greater than The set density of the first optical microstructure.

According to an embodiment of the invention, the area of the second edge region is less than or equal to the area of the first edge region.

According to an embodiment of the present invention, the light incident surface has a groove adjacent to one side of the light emitting surface, and each of the light guiding elements has a side of the rear end surface correspondingly stacked adjacent to the light guide The groove of the body, and the rear end surface is flat on the plane of the groove adjacent to the light-emitting surface, such that the light-emitting surfaces of the adjacent two light-guiding elements are located at the same horizontal plane.

According to an embodiment of the present invention, the first edge region further includes a plurality of blank portions, and the blank portions are disposed corresponding to the position of the light-emitting units of the adjacent light-guiding elements disposed on the light-incident surface.

According to an embodiment of the invention, the distribution density of the light guiding units is proportional to the distance between the set positions and the light emitting unit.

The light guiding component of the present invention transmits the first optical microstructure disposed in the first edge region thereof to effectively control the light intensity of the light guiding component at the edge thereof to effectively avoid the edge of the light guiding component. The production. Moreover, the second optical microstructure is disposed through the second edge region thereof to avoid the generation of the stitching bright line, thereby providing a uniform light source of the planar light source.

<Prior technology>

90‧‧‧Light source module

92‧‧‧Light guide plate

920‧‧‧Into the glossy surface

922‧‧‧Glossy surface

924‧‧‧ bottom surface

925‧‧‧Light guide unit

926‧‧‧ rear end face

95‧‧‧Lighting unit

<present invention>

10, 20‧‧‧Light source module

12, 22‧‧‧Lighting unit

14, 24‧‧‧ Light-guiding components

140, 240‧‧‧Lighting body

142, 242‧‧‧ into the glossy surface

144, 244‧‧‧ glazing

146, 246‧‧‧ bottom surface

147, 247‧‧‧Lighting unit

148, 248‧‧‧ rear end face

150, 250‧‧‧ first marginal area

152, 252‧‧‧ first optical microstructure

16, 26‧‧‧effective light-emitting area

245‧‧‧ Groove

253‧‧‧ Blank Department

254‧‧‧Second marginal area

256‧‧‧Second optical microstructure

D1‧‧‧First setting depth

D2‧‧‧Second setting depth

D3‧‧‧ Third setting depth

The first figure A is a top view of a conventional light source module.

The first figure B is a cross-sectional view of a conventional light source module.

The second figure is a perspective view of a light source module according to a first embodiment of the present invention.

The third figure is a cross-sectional view of a light source module according to a first embodiment of the present invention.

The fourth figure is a perspective view of a light source module according to a second embodiment of the present invention.

Fig. 5 is a cross-sectional view showing a light source module according to a second embodiment of the present invention.

Figure 6 is a cross-sectional view showing a light source module according to a third embodiment of the present invention.

Referring to the second and third figures, respectively, a perspective view and a cross-sectional view of a lighting module according to a first embodiment of the present invention. The illumination module 10 includes at least one light-emitting unit 12 and a light-guiding element 14 . The light-emitting unit 12 defines an effective light-emitting area 16 together with the light-guiding element 14 , and the effective light-emitting area 16 is defined by the light-emitting unit 12 . The light incident on the light guiding element 14 is uniformly emitted.

The light-emitting unit 12 provides the light source required by the light source module 10 and respectively projects light toward the light-incident surface 142 of the light-guiding element 14 . The light-emitting unit 12 has a light intensity, and the distribution of the light intensity gradually decreases as the light-transmitting distance increases, that is, the closer the light intensity is to the light-emitting portion of the light-emitting unit 12, the farther away from the light. The light intensity at the exit of unit 12 is smaller. The light emitting unit 12 can be a light emitting diode, and more preferably, the light emitting unit 12 can be an edge-type light emitting diode to effectively prevent light from being emitted from unnecessary directions. , thereby improving the efficiency of light use.

The light guiding element 14 can guide the light source outputted by the light emitting unit 12, and distribute the light source uniformly to the light guiding element 14 to convert the point light source output by the light emitting unit 12 into a one-side light source output. The light guiding body 14 includes a light guiding body 140. The light guiding body 140 includes a light incident surface 142, a light emitting surface 144, a bottom surface 146 and a rear end surface 148. The light incident surface 142 is provided with the light emitting unit 12, and the light emitting sheet The element 12 projects light toward the light incident surface 142. The light exit surface 144 is adjacent to the light incident surface 142. The bottom surface 146 is opposite to the light-incident surface 142 and adjacent to the light-incident surface 142, and has an angle with the light-emitting surface 144, so that the light-guiding body 140 is wedge-shaped (as shown in the third figure). The rear end surface 148 is disposed opposite to the light incident surface 142 and adjacent to the light exit surface 144 and the bottom surface 146.

The bottom surface 146 is provided with a plurality of light guiding units 147 corresponding to the effective light emitting area 16 . The light guiding units 147 have a first set depth D1. In this embodiment, the first setting depth D1 is The distance from each of the light guiding units 147 from the bottom surface 146 to the inside of the light guiding body 14 is referred to.

The light distribution unit 147 has a distribution density in the effective light exiting region 16 proportional to the received light intensity, and the light intensity of the light emitting unit 12 is increased as the light transmission distance increases. It can be inferred that the distribution density of the light guiding units 147 is increasing along the direction in which the bottom surface 146 is away from the light incident surface 142. It is further explained that the greater the intensity of the light received by the position of the light guiding unit 147 (that is, the closer the light guiding unit 147 is disposed to the light incident surface 142), the distribution of the light guiding unit 147 The density is relatively thinner to reduce the chance of the light source being scattered by the light guiding unit 147 to the light exiting surface 144, so that the light source is effectively transmitted to the rear end of the light guiding element 14. The light intensity received by the light guiding unit 147 is smaller, that is, the light guiding unit 147 is disposed farther away from the light incident surface 142, and the distribution density of the light guiding units 147 is relatively denser. The chance of the light source being scattered to the light exiting surface 144 is increased to increase the brightness of the rear end of the light guiding element 14 and to make the light guiding element 147 emit light uniformity. In other words, the distribution density of the light guiding unit 147 in the effective light exiting region 16 is proportional to the distance between the disposed position and the light emitting unit 12, so that the light emitted from the light emitting unit 12 to the light guiding element 14 can be Have The effect is directed to the entire light guiding body 140 to make the effective light exiting region 16 uniform.

Moreover, the light guiding element 14 further includes a first edge region 150 between the effective light emitting region 16 and the rear end surface 148, and the bottom surface 146 corresponds to the first edge region 150. At least one first optical microstructure 152 is provided.

Referring to the third figure, the first optical microstructure 152 has a second set depth D2, wherein the second set depth D2 means that the first optical microstructure 152 extends from the bottom surface 146 into the light guide body 14 a distance, and the second set depth D2 is greater than the first set depth D1 to reduce the probability that a portion of the light emitted by the light emitting unit 12 is directly emitted by the rear end surface 148 via total internal reflection Further, most of the light incident from the light incident surface 142 is emitted from the light exit surface 144, which can effectively avoid the problem of excessive light intensity of the rear end surface 148, and further enhance the brightness of the light exit surface 144.

Referring to the fourth and fifth figures, respectively, a perspective view and a cross-sectional view of a light source module according to a second embodiment of the present invention. The light source module 20 includes a plurality of light emitting units 22 and a plurality of light guiding elements 24, and the light emitting units 22 define an effective light exiting region 26 together with each of the light guiding elements 24, respectively.

The light-emitting units 22 are configured to provide a light source required by the light source module 20, and the light-emitting units 22 respectively project light toward the light guiding element 24. The light-emitting units 22 have a light intensity, and the light intensity distribution gradually decreases as the light-transmitting distance increases, that is, the closer the light intensity at the light-emitting portion of the light-emitting unit 22 is, the farther away from the light source unit 22 is. The light intensity at the light exiting portion of the light-emitting unit 22 is smaller, and the light-emitting units 22 may be side-emitting type light-emitting diodes.

The light guiding elements 24 can guide the light output by the light emitting units 22 and distribute the light uniformly to the light guiding element 24 to convert the point light source outputted by the light emitting unit 22 into a side light source output. . Each of the light guiding elements 24 includes a light guiding body 240. The light guiding body 240 includes a light incident surface 242, a light emitting surface 244, a bottom surface 246, and a rear end surface 248.

The light incident surface 242 is provided with the light emitting units 22, and the light emitting units 22 respectively project light toward the light incident surface 242. The bottom surface 246 is adjacent to the light-incident surface 244 and adjacent to the light-incident surface 242, and the bottom surface 246 is inclined at an angle to the light-emitting surface 244 to make the light-guiding body 240 wedge-shaped. The rear end surface 248 is disposed relative to the light incident surface 242 and adjacent to the light exit surface 244 and the bottom surface 246. Moreover, the light incident surface 242 has a recess 245 adjacent to one side of the light exiting surface 244 for use in assembling and assembling the light guiding elements 24.

In the actual splicing, the light guiding element 24 has one side of the rear end surface 248 stacked on the groove 245 of the adjacent light guiding element 24, as shown in the fifth figure, and the rear end surface 248 is flat. The groove 245 is adjacent to a plane of the light-emitting surface 244 such that the light-emitting surfaces 244 of the adjacent two light-guiding elements 24 can be located on the same plane.

In addition, the rear end surface 248 of the light guiding element 24 can be directly affixed to the light incident surface 242 of the adjacent light guiding element 24, as shown in FIG. 6, and the light emitting surface of the adjacent two light guiding elements 24 can be made. The 244 can be on the same plane.

The bottom surface 246 is provided with a plurality of light guiding units 247 corresponding to the effective light emitting region 26, and the light guiding units 247 have a first set depth D1. In this embodiment, the first setting depth is The D1 system may refer to a distance from the bottom surface 246 of each of the light guiding units 247 to the inside of the light guiding body 24.

The light distribution unit 247 is proportional to the intensity of the light received by the light-emitting area 26 in the effective light-emitting area 26, that is, the distribution density of the light-guiding units 247 adjacent to the light-incident surface 242 is relatively thin. The distribution density of the light guiding units 247 disposed away from the light incident surface 242 is relatively dense; in other words, the distribution density of the light guiding units 247 in the effective light exiting region 26 and its set position and the light emitting unit 22 The distance between them is proportional, so as to effectively guide the light incident from the light-emitting unit 22 from the light-incident surface 242 to the entire light-guiding body 24.

Moreover, the light guiding element 24 further includes a first edge region 250 between the effective light exiting region 26 and the rear end surface 248 and adjacent to the effective light emitting region 26, the bottom surface 246 At least one first optical microstructure 252 is disposed at the corresponding first edge region 250.

Referring to FIG. 5, the first optical microstructure 252 has a second set depth D2, and the second set depth D2 is greater than the first set depth D1 to reduce a portion of the light emitted by the light emitting unit 22. The probability of total internal reflection directly from the rear end surface 248, and thus most of the light incident from the light incident surface 242 is emitted from the light exit surface 244, thereby enhancing the brightness of the light exit surface 244.

Moreover, in order to solve the problem of the stitching bright line of the splicing light guiding element 24 more effectively, the light guiding element 24 further includes a second edge region 254, and the second edge region 254 is disposed at the first edge region 250 and The area between the rear end faces 248 and the second edge regions 254 is less than or equal to the area of the first edge regions 250. The second edge region 250 is provided with at least one second optical microstructure 256 having a third set depth D3, wherein the third set depth D3 is greater than the second set depth D2.

Moreover, in order to cause the light of the light-emitting unit 22 of the splicing light-guiding element 24 at the splicing portion to cause the first edge region 250 of the adjacent light-guiding element 24 to appear at a position corresponding to the light-emitting unit 22; Each of the light guiding elements 24 is provided with a plurality of blank portions 253 in the first edge region 250. The blank portions 253 are disposed corresponding to the light emitting unit 22, that is, the light emitting unit 22 is disposed below the blank portion 253. The blanking portion 253 is not disposed with the light guiding unit 247, the first optical microstructure 252 or the second optical microstructure 256 to prevent the light source outputted by the light emitting unit 22 from being scattered a large amount to cause corresponding light emission. Unit 22 sets the generation of the spot of the position.

Part of the light incident on the light guiding body 24 via the light incident surface 242 by the light emitting unit 22 is scattered by the light guiding unit 247, and the light is refracted by the light emitting surface 244, and some of the light passes through the light guiding light. The unit 247 is scattered and transmitted toward the rear end surface 248, or a portion of the light is transmitted to the light guiding body 24 for total internal reflection to the first optical microstructure 252 or the second optical microstructure 256, and via the first The optical microstructure 252 or the second optical microstructure 256 is scattered to emit light from the light exit surface 244. The set depths of the first optical microstructures 252 and the second optical microstructures 256 are higher than the set depths of the light guiding units 247, and the set depth of the light guiding unit 247 is set to a position and the light emitting unit. The distance between the two is proportional to the distance between the two, so that a large amount of light can be effectively prevented from being emitted by the rear end surface 248, thereby achieving the effect of avoiding the edge bright line and the stitching bright line.

The first optical microstructure is disposed in the first edge region of the light guiding element away from the light incident surface, and the depth of the setting is greater than the depth of the light guiding unit, so as to effectively improve the conventional single The edge of the light source module combined with the light-emitting unit and the light-emitting unit is brightly lined to cause uneven light emission; and a second optical microstructure can be disposed adjacent to the second edge of the rear end surface, and the setting is Large depth The set depth of the first optical microstructure can effectively improve the stitching bright line generated by the conventional light guiding element during splicing, so as to increase the light uniformity of the integrated light source module.

However, the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the equivalent changes and modifications made by the scope of the present invention should still be covered by the patent of the present invention. The scope of the scope is intended to protect.

10‧‧‧Light source module

12‧‧‧Lighting unit

14‧‧‧Light guiding elements

142‧‧‧Into the glossy surface

146‧‧‧ bottom surface

147‧‧‧Light guide unit

150‧‧‧First marginal area

152‧‧‧First optical microstructure

16‧‧‧effective light-emitting area

Claims (10)

A light source module includes: a plurality of light-emitting units; a plurality of light-guiding elements, each of the light-guiding elements includes a light-guiding body, and the light-guiding system and the light-emitting unit together define an effective light-emitting area, the light-guiding body The method includes: a light incident surface for providing the light emitting units, wherein the light emitting units respectively project light toward the light incident surface; a light emitting surface adjacent to the light incident surface; and a bottom surface opposite to the light emitting surface An angled inclination with the light-emitting mask, the bottom surface is provided with a plurality of light guiding units having a first set depth at a corresponding effective light-emitting area; a rear end surface opposite to the light-incident surface and adjacent to the light-emitting surface And the bottom surface; and a first edge region between the effective light exiting region and the rear end surface, and the bottom surface is provided with at least one first optical micrometer having a second set depth at the corresponding first edge region a structure, wherein the second set depth is greater than the first set depth; a second edge area between the first edge area and the rear end surface, the bottom surface corresponding to the second edge area Providing at least one second optical microstructure having a third set depth, wherein the third set depth is greater than the second set depth, and a difference between the third set depth and the second set depth is greater than the second setting a difference between the depth and the first set depth; and a groove formed on the side of the light incident surface adjacent to the light exiting surface, wherein each of the light guiding bodies has one side of the rear end surface stacked adjacent to each other Light guide body The second edge region is at least corresponding to the groove of the adjacent light guiding body, and the rear end surface of each of the light guiding bodies is adjacent to the groove of the adjacent light guiding body. In a plane of the light-emitting surface, the light-emitting surfaces of the adjacent two light-conducting bodies are located on the same horizontal plane. The light source module of claim 1, wherein the first optical microstructure has a set density greater than a set density of the light guide unit, and the second optical microstructure has a set density greater than the first optical microstructure. Set the density. The light source module of claim 1, wherein the arrangement density of the light guiding units is proportional to a distance between the set position and the light emitting unit. The light source module of claim 1, wherein the area of the second edge region is less than or equal to the area of the first edge region. The light source module of claim 1, wherein the first edge region further comprises a plurality of blank portions, the blank portions being disposed corresponding to the light emitting units of the adjacent light guiding elements. A light source module comprising: a plurality of light-emitting units; a plurality of light-guiding elements, each of the light-guiding elements comprising a light-guiding body, the light-guiding system and the light-emitting units jointly defining an effective light-emitting area, the light-guiding body The method includes: a light incident surface for providing the light emitting units, wherein the light emitting units respectively project light toward the light incident surface; a light emitting surface adjacent to the light incident surface; and a bottom surface opposite to the light emitting surface An angled inclination with the light-emitting mask, the bottom surface is provided with a plurality of light guiding units having a first set depth at a corresponding effective light-emitting area; a rear end surface opposite to the light-incident surface and adjacent to the light-emitting surface And the bottom surface; a first edge region between the effective light exiting region and the rear end surface, the bottom surface being provided with at least one first optical microstructure having a second set depth at the corresponding first edge region, wherein the second setting The depth is greater than the first set depth; and a second edge region is between the first edge region and the rear end surface, and the bottom surface is provided with at least a third set depth at the corresponding second edge region a second optical microstructure, wherein the third set depth is greater than the second set depth, and the difference between the third set depth and the second set depth is greater than a difference between the second set depth and the first set depth; The rear end surface of each of the light guiding bodies is flat on the light incident surface of the adjacent light guiding body, so that the light emitting surfaces of the adjacent two light guiding bodies are located at the same horizontal plane. The light source module of claim 6, wherein the first optical microstructure has a set density greater than a set density of the light guide unit, and the second optical microstructure has a set density greater than the first optical microstructure. Set the density. The light source module of claim 6, wherein the area of the second edge region is less than or equal to the area of the first edge region. The light source module of claim 6, wherein the first edge region further comprises a plurality of blank portions, wherein the blank portions are disposed corresponding to the arrangement positions of the light-emitting units of the adjacent light guiding elements. The light source module of claim 6, wherein the arrangement density of the light guiding units is proportional to a distance between the set position and the light emitting unit.