CN111350974A - Light source module - Google Patents
Light source module Download PDFInfo
- Publication number
- CN111350974A CN111350974A CN201811580139.2A CN201811580139A CN111350974A CN 111350974 A CN111350974 A CN 111350974A CN 201811580139 A CN201811580139 A CN 201811580139A CN 111350974 A CN111350974 A CN 111350974A
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- CN
- China
- Prior art keywords
- light
- guide plate
- groove
- light guide
- source module
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V7/00—Reflectors for light sources
- F21V7/04—Optical design
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V2200/00—Use of light guides, e.g. fibre optic devices, in lighting devices or systems
- F21V2200/20—Use of light guides, e.g. fibre optic devices, in lighting devices or systems of light guides of a generally planar shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2131/00—Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
- F21W2131/10—Outdoor lighting
- F21W2131/103—Outdoor lighting of streets or roads
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Planar Illumination Modules (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a light source module which comprises a light guide plate, a first reflecting plate, a light-emitting device and a second reflecting plate. The light guide plate has a top surface and a bottom surface opposite to each other. The light guide plate comprises a first groove positioned on the top surface and a second groove positioned on the bottom surface. The first reflecting plate is arranged on the top surface of the light guide plate to cover the first groove, and two light emergent areas are formed on the top surface. The light-emitting device is arranged in the second groove and is suitable for providing light beams. The second reflecting plate is arranged on the bottom surface of the light guide plate to cover the bottom surface and the second groove, wherein the light beam enters the light guide plate from the second groove and is transmitted out of the light guide plate from the two light-emitting areas. Therefore, asymmetrical uniform light can be provided to improve the light use efficiency, and the heat dissipation effect of the light emitting device can be improved.
Description
Technical Field
The present invention relates to an optical module, and more particularly, to a light source module.
Background
In the LED lighting device applied to road lighting nowadays, due to the point light source characteristic, the light emitting surface of the lamp presents many light points, the intensity of the light points is very high, and the light points are strongly contrasted with the background, so that the light points are very uncomfortable visually. Recently, a few products have been proposed to provide solutions for converting light spots into surface light sources, such as adding a diffusion layer to the light emitting area of a lamp or using an optical module as a backlight module of an LCD, which, although they solve the discomfort of strong contrast of the optical area to a different extent, also destroy the proportion of the optical energy that the street lamp should have before the lamp. Because the street lamp is positioned at the edge of the road, the energy of the light projected by the lamp before the lamp and after the lamp is necessarily asymmetric light; if the light is distributed symmetrically, approximately half of the light will be emitted outside the road to cause waste, such as houses or farmlands behind the light, and further cause loss of light energy. In addition, in the lighting device of the backlight module applied to road lighting, the light emitting component (such as a light emitting diode) is configured at the side of the light guide plate, so that the heat dissipation surface is perpendicular to the plane of the lighting device and is positioned at the edge, which causes poor heat dissipation effect. Therefore, those skilled in the art have made efforts to design a road lighting device that can intensively irradiate a road with uniform light and improve a heat dissipation effect.
Disclosure of Invention
The invention provides a light source module which can provide asymmetrical uniform light to improve the light use efficiency and improve the heat dissipation effect of a light-emitting device.
The invention provides a light source module, which comprises a light guide plate, a first reflecting plate, a light-emitting device and a second reflecting plate. The light guide plate has a top surface and a bottom surface opposite to each other. The light guide plate comprises a first groove positioned on the top surface and a second groove positioned on the bottom surface. The first reflecting plate is arranged on the top surface of the light guide plate to cover the first groove, and two light emergent areas are formed on the top surface. The light-emitting device is arranged in the second groove and is suitable for providing light beams. The second reflecting plate is arranged on the bottom surface of the light guide plate to cover the bottom surface and the second groove, wherein the light beam enters the light guide plate from the second groove and is transmitted out of the light guide plate from the two light-emitting areas.
In an embodiment of the invention, an extending direction of the first groove is parallel to an extending direction of the second groove.
In an embodiment of the invention, the first groove is formed by two planes, and an extending direction of the first groove is parallel to an extending direction of the short side of the light guide plate.
In an embodiment of the invention, the second groove includes a plurality of sub-grooves, and is in a direction parallel to the short side of the light guide plate. The height of the sub-groove at the light guide plate is gradually reduced from one end of the short side of the light guide plate to the other end of the short side of the light guide plate.
In an embodiment of the invention, each of the sub-grooves is formed by three planes, and one of the planes is perpendicular to the light guide plate.
In an embodiment of the invention, the sub-grooves are in a truncated triangular pyramid shape, and the sub-grooves are communicated with each other.
In an embodiment of the invention, the sub-grooves are triangular pyramid-shaped, and the sub-grooves are not connected to each other.
In an embodiment of the invention, the light emitting device includes a plurality of light emitting elements respectively located in the sub-grooves.
In an embodiment of the invention, an angle of a vertex of the first groove in a direction parallel to the long side of the light guide plate is greater than an angle of a vertex of the second groove in a direction parallel to the long side of the light guide plate.
In an embodiment of the invention, a height of the first groove is greater than or equal to a quarter of a thickness of the light guide plate.
In an embodiment of the invention, a maximum height of the second groove is greater than or equal to a height of the first groove.
In an embodiment of the invention, the light guide plate includes a plurality of optical microstructures.
In an embodiment of the invention, an area of a top surface of the light guide plate is between 100 square centimeters and 1000 square centimeters.
In an embodiment of the invention, a thickness of the light guide plate is between 2 mm and 15 mm.
In view of the above, in the light source module of the present invention, the light beam provided by the light emitting device enters the light guide plate through the second groove of the light guide plate, and is reflected by the first reflective plate disposed on the top surface of the light guide plate to reenter the light guide plate. The light beam re-entering the light guide plate can be transmitted out of the light guide plate through the two light-emitting areas on the top surface of the light guide plate by the reflection of the second reflecting plate. Meanwhile, the light beam provided by the light-emitting device can be deflected by the structural design of the second groove, so that asymmetrical uniform light is provided during light emitting, and the light use efficiency can be improved during illumination. In addition, the light-emitting device is arranged in parallel to the extending direction of the whole light source module, which is helpful for improving the heat dissipation effect of the light-emitting device and further prolonging the service life of the light source module.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic perspective view of a light source module according to an embodiment of the invention.
Fig. 2A and fig. 2B are schematic perspective views of a part of the light source module in fig. 1 at different viewing angles.
Fig. 3 is a schematic top view of a portion of the light source module of fig. 1.
Fig. 4 is a sectional view of the light source module of fig. 1 taken along line a-a.
Fig. 5 is a sectional view of the light source module of fig. 1 taken along line B-B.
Detailed Description
Fig. 1 is a schematic perspective view of a light source module according to an embodiment of the invention. Please refer to fig. 1. The light source module 100 of the present embodiment can be applied to a lighting device on a road, such as a street lamp, and is suitable for providing asymmetric uniform light on the road to improve the light utilization efficiency and improve the heat dissipation effect of the light emitting device 130 in the light source module 100. Specifically, in the present embodiment, the light source module 100 includes a light guide plate 110, a first reflection plate 120, a light emitting device 130, and a second reflection plate 140.
Fig. 2A and fig. 2B are schematic perspective views of a part of the light source module in fig. 1 at different viewing angles. Please refer to fig. 1, fig. 2A and fig. 2B. The light guide plate 110 has a top surface S1 and a bottom surface S2 opposite to each other, and the light guide plate 110 includes a first groove 112 on the top surface S1 and a second groove 114 on the bottom surface S2. In the present embodiment, the extending direction of the first groove 112 and the extending direction of the second groove 114 are both parallel to the extending direction of the short side of the light guide plate 110, as shown in fig. 2A and 2B. In other words, the extending direction of the first groove 112 is parallel to the extending direction of the second groove 114, but the invention is not limited thereto. The area of the top surface S1 of the light guide plate 110 of the embodiment is between 100 square centimeters and 1000 square centimeters, and the thickness L1 of the light guide plate 110 is between 2 millimeters and 15 millimeters. In addition, in the embodiment, the light guide plate 110 may include a plurality of optical microstructures (not shown) on the outer plane of the groove, which are suitable for the light to generate the effect of a surface light source. The plurality of optical microstructures may be additive particles, optical microstructures, or atomized material, and the invention is not limited thereto.
The light emitting device 130 is disposed in the second groove 114 and adapted to provide a light beam L. In detail, in the present embodiment, the light emitting device 130 includes a plurality of light emitting elements 132, the second groove 114 includes a plurality of sub-grooves 114a, and the light emitting elements 132 are respectively and correspondingly located in the sub-grooves 114 a. It should be noted that, since the light emitting element 132 is disposed in the second groove 114 of the bottom surface S2 of the light guide plate 110, a heat dissipation surface (not shown) of the light emitting element 132 is parallel to the extending direction of the entire light source module 100, i.e., the plane of the lamp. Therefore, the heat dissipation surface is tightly attached to the lamp plane, which is helpful to improve the heat dissipation effect of the light emitting device 130, and further increase the service life of the light source module 100.
The first reflective plate 120 is disposed on the top surface S1 of the light guide plate 110 to cover the first groove 112 and form two light exiting regions C on the top surface S1 of the light guide plate 110. The second reflective plate 140 is disposed on the bottom surface S2 of the light guide plate 110 to cover the bottom surface S2 of the light guide plate 110 and the second groove 114. The light emitting surface of the light emitting element 132 is disposed facing the light guide plate 110. Therefore, the light beams L emitted by the light emitting elements 132 enter the light guide plate 110 through the second grooves 114 of the light guide plate 110, and are transmitted out of the light guide plate 110 through the two light emitting areas C after being reflected and refracted for multiple times, as shown in fig. 1.
Fig. 3 is a schematic top view of a portion of the light source module of fig. 1. Fig. 4 is a sectional view of the light source module of fig. 1 taken along line a-a. Fig. 5 is a sectional view of the light source module of fig. 1 taken along line B-B. Please refer to fig. 1, fig. 3, fig. 4 and fig. 5. In detail, in the present embodiment, the first groove 112 is formed by two planes, and forms a top angle D1, as shown in fig. 2A. Therefore, when the light beam L emitted by the light emitting device 130 passes from the second groove 114 to the first groove 112, it is refracted many times and passes to the first reflective plate 120, and passes into the light guide plate 110 again by reflection of the first reflective plate 120, as shown in fig. 4. The light beam L re-entering the light guide plate 110 can be transmitted out of the light guide plate 110 by the two light exiting regions C of the top surface S1 of the light guide plate 110 through reflection of the second reflection plate 140.
On the other hand, the heights of the sub-grooves 114a of the second groove 114 on the light guide plate 110 are uniformly gradually reduced toward the same direction, as shown in fig. 5. More specifically, each sub-groove 114a is formed by three planes, one of which is perpendicular to the light guide plate 110, and the other two planes are inclined planes with gradually decreasing heights, and a vertex angle D2 is formed on a cross section parallel to the long side of the light guide plate 110 and perpendicular to the short side of the light guide plate 110, as shown in the partially enlarged view of fig. 1 and fig. 5. In addition, in the present embodiment, the sub-grooves 114a are in the shape of truncated triangular pyramids, and the sub-grooves 114a are communicated with each other, as shown in fig. 5. However, in other embodiments, the sub-recesses 114a may be triangular in shape according to the arrangement density of the light emitting elements 132 in the light emitting device 130, and the sub-recesses 114a are not connected to each other.
Therefore, when the light beam L is emitted from the light emitting device 130 toward the top surface S1, the transmission path of the light beam L will be affected by the two inclined surfaces of the triangular pyramid-shaped sub-groove 114 a. In the present embodiment, the light beam L is deflected toward the tapered top of the sub-groove 114a, as shown in fig. 1, 3 and 5. In this way, when the light source module 100 is configured to be used on an illumination road, and the extending direction of the long side of the light source module 100 is parallel to the extending direction of the road, an asymmetric uniform surface light with a high ratio of light energy in a specific direction can be further provided, and the light source module can be further applied to the illumination road to improve the light use efficiency.
In the present embodiment, the angle of the vertex angle D1 of the first groove 112 in the direction parallel to the long side of the light guide plate 110 is greater than the angle of the vertex angle D2 of the second groove 114 in the direction parallel to the long side of the light guide plate 110. In the embodiment, the height L2 of the first groove 112 is greater than or equal to one fourth of the thickness L1 of the light guide plate 110, and the maximum height L3 of the second groove 114 is greater than or equal to the height L2 of the first groove 112, but the invention is not limited thereto.
In summary, in the light source module of the present invention, the light beam provided by the light emitting device enters the light guide plate through the second groove of the light guide plate, and is reflected by the first reflective plate disposed on the top surface of the light guide plate to reenter the light guide plate. The light beam re-entering the light guide plate is totally reflected inside the light guide plate, and is directly transmitted out of the light guide plate when the total reflection is damaged by the microstructures, or can be transmitted out of the light guide plate through two light-emitting areas on the top surface of the light guide plate through reflection of the second reflecting plate. Meanwhile, the light beam provided by the light-emitting device can be deflected through the structural design of the second groove, so that asymmetric uniform surface light with high proportion of light energy in a specific direction is provided during light emitting, and the light use efficiency can be improved in illumination. In addition, the light-emitting device is arranged in parallel to the extending direction of the whole light source module, which is helpful for improving the heat dissipation effect of the light-emitting device and further prolonging the service life of the light source module.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (14)
1. A light source module, comprising:
the light guide plate is provided with a top surface and a bottom surface which are opposite, and comprises a first groove positioned on the top surface and a second groove positioned on the bottom surface;
the first reflecting plate is arranged on the top surface of the light guide plate to cover the first groove, and two light emergent areas are formed on the top surface;
the light-emitting device is arranged in the second groove and is suitable for providing light beams; and
and the second reflecting plate is arranged on the bottom surface of the light guide plate to cover the bottom surface and the second groove, wherein the light beams enter the light guide plate from the second groove and are transmitted out of the light guide plate from the two light emergent areas.
2. The light source module according to claim 1, wherein an extending direction of the first groove is parallel to an extending direction of the second groove.
3. The light source module of claim 1, wherein the first groove is formed by two planes, and an extending direction of the first groove is parallel to an extending direction of the short side of the light guide plate.
4. The light source module according to claim 1, wherein the second groove comprises a plurality of sub-grooves, and the sub-grooves are gradually reduced in height of the light guide plate from one end of the short side of the light guide plate toward the other end of the short side of the light guide plate in a direction parallel to the short side of the light guide plate.
5. The light source module as claimed in claim 4, wherein each of the sub-grooves is formed by three planes, and one of the planes is perpendicular to the light guide plate.
6. The light source module as claimed in claim 4, wherein the sub-grooves have a shape of a truncated triangular pyramid and communicate with each other.
7. The light source module as claimed in claim 4, wherein the sub-grooves are triangular pyramid-shaped and do not communicate with each other.
8. The light source module of claim 4, wherein the light emitting device comprises a plurality of light emitting components respectively located in the sub-grooves.
9. The light source module according to claim 1, wherein a vertex angle of the first groove in a direction parallel to the long side of the light guide plate is larger than a vertex angle of the second groove in a direction parallel to the long side of the light guide plate.
10. The light source module of claim 1, wherein the height of the first groove is greater than or equal to one quarter of the thickness of the light guide plate.
11. The light source module of claim 1, wherein a maximum height of the second groove is greater than or equal to a height of the first groove.
12. The light source module of claim 1, wherein the light guide plate comprises a plurality of optical microstructures.
13. The light source module as claimed in claim 1, wherein the top surface area of the light guide plate is between 100 cm and 1000 cm.
14. The light source module of claim 1, wherein the light guide plate has a thickness of between 2 mm and 15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811580139.2A CN111350974A (en) | 2018-12-24 | 2018-12-24 | Light source module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811580139.2A CN111350974A (en) | 2018-12-24 | 2018-12-24 | Light source module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111350974A true CN111350974A (en) | 2020-06-30 |
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ID=71191920
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811580139.2A Pending CN111350974A (en) | 2018-12-24 | 2018-12-24 | Light source module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111350974A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008743A (en) * | 2006-01-25 | 2007-08-01 | 中强光电股份有限公司 | Luminescence module and surface light source device |
| CN101206280A (en) * | 2007-12-20 | 2008-06-25 | 清华大学 | Light guide board and back light module unit using the same |
| CN102313241A (en) * | 2010-07-02 | 2012-01-11 | 中盟光电股份有限公司 | Optical element for illuminating device and design method thereof |
| CN203202908U (en) * | 2013-04-22 | 2013-09-18 | 深圳市汉鼎能源科技有限公司 | LED road lamp light distribution lens |
| CN103511911A (en) * | 2012-06-26 | 2014-01-15 | 扬升照明股份有限公司 | Light source module |
| CN104456425A (en) * | 2013-09-13 | 2015-03-25 | 扬升照明股份有限公司 | Planar light source |
| CN205655240U (en) * | 2016-05-31 | 2016-10-19 | 山东凯创光电科技有限公司 | A LED street lamp lens for rural road illumination |
-
2018
- 2018-12-24 CN CN201811580139.2A patent/CN111350974A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101008743A (en) * | 2006-01-25 | 2007-08-01 | 中强光电股份有限公司 | Luminescence module and surface light source device |
| CN101206280A (en) * | 2007-12-20 | 2008-06-25 | 清华大学 | Light guide board and back light module unit using the same |
| CN102313241A (en) * | 2010-07-02 | 2012-01-11 | 中盟光电股份有限公司 | Optical element for illuminating device and design method thereof |
| CN103511911A (en) * | 2012-06-26 | 2014-01-15 | 扬升照明股份有限公司 | Light source module |
| CN203202908U (en) * | 2013-04-22 | 2013-09-18 | 深圳市汉鼎能源科技有限公司 | LED road lamp light distribution lens |
| CN104456425A (en) * | 2013-09-13 | 2015-03-25 | 扬升照明股份有限公司 | Planar light source |
| CN205655240U (en) * | 2016-05-31 | 2016-10-19 | 山东凯创光电科技有限公司 | A LED street lamp lens for rural road illumination |
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Application publication date: 20200630 |
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