CN113267844A - Transparent one-way light-emitting light source module - Google Patents
Transparent one-way light-emitting light source module Download PDFInfo
- Publication number
- CN113267844A CN113267844A CN202110375043.8A CN202110375043A CN113267844A CN 113267844 A CN113267844 A CN 113267844A CN 202110375043 A CN202110375043 A CN 202110375043A CN 113267844 A CN113267844 A CN 113267844A
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- guide plate
- light guide
- light
- auxiliary
- sawtooth
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a transparent unidirectional light emitting light source module, which comprises a light source and a light guide plate, wherein the light guide plate comprises a light incident surface, a first surface and a second surface.
Description
Technical Field
The present disclosure relates to light source modules, and particularly to a transparent unidirectional light emitting light source module.
Background
With the development of display technology and the requirements of different display scenes, the novel display system has a larger market prospect, such as a reflective liquid crystal display system with more energy-saving and eye-protecting functions, an electronic paper display system and a transparent display system with more advanced application, but the light source requirements of the systems have very high transparency and good light-emitting unidirectionality, so that the transparent unidirectional light-emitting light source system is the premise that the novel display systems are applied to the market.
Patent US20180052274a1 is a thin film light guide film, as shown in fig. 1, a microstructure is manufactured on the light guide film, so that light rays pass through the microstructure and then destroy the total reflection condition of the light rays propagating, and then the light rays are emitted from the other surface of the light guide film. The cost is high, the process is complex, and the efficiency is low.
The light guide film structure in patent CN 109031512 a is a trapezoidal structure, as shown in fig. 2, the light guide film is bonded with the glue layer for the light guide plate, which is equivalent to that there is an inverted trapezoidal structure on the surface of the light guide plate, and light is emitted from the trapezoidal bottom surface after entering the side of the inverted trapezoidal structure to diffuse and totally reflect. The light guide film structure needs an adhesive layer to bond two structures together, and the smoothness of the adhesive layer greatly influences the light emitting effect, so that the problems of reduced contrast, reduced brightness and the like are caused;
as shown in fig. 3, the microstructure is manufactured on the CN 108519637 a light guide plate, and the shape of the microstructure is a truncated cone, and light irradiates the surface of the microstructure to refract light from the surface. The light leakage phenomenon of the back surface exists, although the light leakage of the back surface can be inhibited by the semitransparent and semi-reflecting film adhered to the back surface, the light transmittance is reduced, and meanwhile, the semitransparent and semi-reflecting structure needs to be aligned with the opposite micro structure, so the process is complex and the cost is high.
Disclosure of Invention
The invention aims to solve the technical problem of providing a transparent unidirectional light-emitting light source module which has good collimation, high transparency, simple manufacturing process and lower cost.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a transparent one-way light source module that goes out, includes light source and light guide plate, the light guide plate include income plain noodles, first surface and second surface, its characterized in that the first surface on be provided with the laminating layer, the refracting index of light guide plate be greater than the laminating layer the refracting index.
The refractive index of the light guide plate is preferably greater than the refractive index of the adhesive layer by 0.05 or more.
The light guide plate is a wedge-shaped light guide plate, and an included angle between the light incident surface and the first surface is 80-100 degrees.
The second surface of the wedge-shaped light guide plate is provided with a protective layer, and the refractive index of the adhesive layer is larger than that of the protective layer.
One side of the wedge-shaped light guide plate facing the light source is integrally provided with a horn-shaped first auxiliary light guide plate.
The non-binding surface of the binding layer is provided with an inverted trapezoidal collimation microprism array.
The light guide plate is a parallel light guide plate, the second surface is provided with a sawtooth microstructure, one side of the light guide plate, which faces the light source, is integrally provided with a second auxiliary light guide plate, the surface of the second auxiliary light guide plate, which is on the same side with the second surface, is provided with an auxiliary sawtooth microstructure, and the sawtooth direction of the sawtooth microstructure is opposite to that of the auxiliary sawtooth microstructure.
The light guide plate is a parallel light guide plate, the first surface is provided with a sawtooth microstructure, the binding layer is filled with the sawtooth microstructure, one side of the light guide plate, which faces the light source, is integrally provided with a second auxiliary light guide plate, the second auxiliary light guide plate and the surface of the first surface on the same side are provided with auxiliary sawtooth microstructures, and the sawtooth microstructures are opposite to the sawtooth direction of the auxiliary sawtooth microstructures.
Compared with the prior art, the invention has the advantages that the structure of each component is simple, the manufacturing difficulty and the cost are lower, single-side light emitting can be effectively realized, the collimation of the parallel light beam with the enlarged cross section is good, the transparency of the whole module is extremely high, and the invention has great compatibility with other technologies.
Drawings
FIG. 1 is a schematic structural diagram of patent US20180052274A 1;
FIG. 2 is a schematic structural diagram of patent CN 109031512A;
FIG. 3 is a schematic structural diagram of patent CN 108519637A;
FIG. 4 is a schematic structural diagram according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of an application example of the first embodiment of the present invention;
FIG. 6 is a schematic structural diagram according to a second embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a third embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a fourth embodiment of the present invention;
fig. 9 is a schematic structural diagram of a fifth embodiment of the present invention.
Fig. 10 is a schematic structural diagram of a sixth embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The first embodiment is as follows: as shown in fig. 4, a transparent unidirectional light emitting source module includes a light source 1 and a wedge-shaped light guide plate 2, the wedge angle is γ, the wedge-shaped light guide plate 2 includes a light incident surface 20, a first surface 21 and a second surface 22, an adhesive layer 3 is disposed on the first surface 21, the material of the wedge-shaped light guide plate 2 is PC, PMMA or glass with a refractive index of 1.5 to 1.7, which is greater than the refractive index of the adhesive layer 3 by more than 0.05, the material of the adhesive layer 3 can be PMMA, silica gel, acrylic resin or epoxy resin with a refractive index of 1.5 to 1.3, etc., light emitted from the light source 1 enters the wedge-shaped light guide plate 2, when the light 201 reaches the first surface 21 at the junction between the wedge-shaped light guide plate 2 and the adhesive layer 3, the incident angle is α, when α is greater than the total reflection angle of the two materials, the light propagates in the wedge-shaped light guide plate 2, because the wedge-shaped structure can make the incident angle α gradually decrease at a speed of 2 γ times, therefore, when the incident angle α is smaller than the total reflection angle of the two materials, the light exits into the laminating layer 3. Since the light 201 enters the adhesive layer 3 just before the total reflection condition is destroyed, the exit angle β is a large-angle collimated light close to 90 °, and finally enters the display system. Because the wedge angle gamma limits the emergent angle, the incident angle of all emergent rays does not exceed (total reflection angle-2 gamma) degrees, all emergent rays are collimation large-angle emergent rays, and because the other surface 22 is not attached and is an air medium, when the incident angle alpha does not meet the total reflection angle of the first surface 21, the total reflection angle of the air of the second surface 22 and the material of the wedge-shaped light guide plate 2 is still met, single-side emergent light can be realized, because the angle gamma of the wedge-shaped light guide plate 2 is extremely small, and the surface has no other emergent light structures, the transparency of the whole module is extremely high.
As an example of this embodiment, as shown in fig. 5, a display 4 is provided on a non-lamination surface 31 of a lamination layer 3.
Example two: as shown in fig. 6, in the first embodiment, the protection layer 5 is disposed on the side of the wedge-shaped light guide plate 2 opposite to the second surface 22 of the adhesive layer 3, and the refractive index of the protection layer 5 is lower than the refractive index of the adhesive layer, so that for the light in the wedge-shaped light guide plate 2, the total reflection angle α of the adhesive layer 3 on the first surface 21 is greater than the total reflection angle Ω of the protection layer 5 on the second surface 22, and therefore the light 202 is totally reflected on the second surface 22, but may not be totally reflected on the first surface 21. Since the speed of the light 202 approaching the total reflection angle is 2 gamma degrees after each total reflection, the total reflection angle alpha only needs to be larger than the total reflection angle omega by 2 gamma degrees, that is, the total reflection angle alpha is
α-Ω≥2γ
The refractive index n of the protective layer 52Refractive index n of adhesive layer 31And the refractive index n of the wedge-shaped light guide plate, only the following relationship is satisfied
arcsin(n1/n)-arcsin(n2/n)≥2γ
After protective layer 5 exists, whole module can continue to laminate other structures and not influence its optical effect, can adapt to the technological requirement of laminating entirely.
Example three: as shown in fig. 7, in the first embodiment, a horn-shaped first auxiliary light guide plate 6 is integrally disposed on one side of the wedge-shaped light guide plate 2 facing the light source 1, the horn-shaped first auxiliary light guide plate has a horn-shaped included angle θ, and includes two auxiliary surfaces 23 and 24, the light is effectively collimated when the light is irradiated onto the auxiliary surfaces 23 and 24, the light 301 is irradiated onto the auxiliary surface 23, the light is totally reflected on the surface 23, the traveling angle of the light is deflected by θ degrees in the counterclockwise direction, the light 302 is irradiated onto the auxiliary surface 24, the light is totally reflected on the surface 24, the traveling angle of the light is deflected by θ degrees in the clockwise direction, and thus the light 301 and 302 is collimated after passing through the auxiliary surfaces 23 and 24,the light rays then reach the first surface 21 with angles of incidence alpha of the light rays 301 and 302 with respect to the first surface 211And alpha2Compared with the prior art, the total reflection condition of the first surface 21 is better satisfied, the efficiency of the whole system is greatly improved, meanwhile, the light rays 301 and 302 are closer to the light rays with the degree of 0, the range irradiated on the first surface 21 moves towards the tail end, and the uniformity of the system is better adjusted.
Example four: as shown in fig. 8, the surface 31 of the adhesive layer 3 is provided with the inverted trapezoidal collimating micro-prism array 50, so that the large-angle light 601 and the like can be vertically emitted through the collimating micro-prism array 50, the light 601 can be emitted from the light guide plate 2 because the light does not satisfy the total reflection condition of the first surface 21, but since the wedge angle γ of the light guide plate 2 is extremely small, the range of the emitting angle of the light 601 is only within the range of the wedge angle γ, all the light rays similar to the light 601 are highly collimated light rays, after the light 601 passes through the adhesive layer 3, the light 601 enters the collimating micro-prism array 50 through the contact surface 31 between the adhesive layer 3 and the collimating micro-prism array 50, after the light 601 enters the collimating micro-prism array 50, the light is irradiated onto the surface 51, the light is totally reflected on the surface 51, the light 601 passes through the surface 52 and is vertically emitted, the light 601 has an extremely high angle collimation degree before entering the inverted trapezoidal collimating micro-prism array 50, the collimating micro-prism array 50 can adjust the angle of the surface 51 according to the angle of the light 601, so that the light 601 can be vertically emitted on the surface 52, and the collimating micro-prism array 50 can also be a two-dimensional array for collimating the light with two dimensions.
Example five: as shown in fig. 9, the light guide plate 2 is a parallel light guide plate, the first sawtooth microstructure 25 is disposed on the second surface 22, the vertex angle of the first sawtooth is γ, the flat-plate-shaped second auxiliary light guide plate 7 is integrally disposed on one side of the light guide plate 2 facing the light source 1, the second sawtooth microstructure 26 is disposed on the surface of the flat-plate-shaped second auxiliary light guide plate 7 on the same side as the second surface 22, the vertex angle of the second sawtooth is θ, the light 701 irradiates on the sawtooth surface of the second sawtooth microstructure 26, and is totally reflected on the surface thereof, the advancing angle of the light 701 after total reflection deviates by θ degrees in the clockwise direction, and the light 701 is closer to zero-degree light, so that the second sawtooth microstructure 26 has the same function as the bell mouth structure in the third embodiment; then, the light 701 irradiates the first surface 21 to be totally reflected and continuously transmitted forward, and then irradiates the sawtooth surface of the first sawtooth-shaped microstructure 25 to be totally reflected on the surface thereof, the light deflects by γ degrees in the counterclockwise direction, and then continuously irradiates the first surface 21, an incident angle of the light 701 with respect to the first surface 21 is reduced by 2 γ degrees compared with that before, and when the incident angle is smaller than the total reflection angle, the light 701 exits on the first surface 21 and enters a subsequent optical structure, so that the first sawtooth-shaped microstructure 25 can complete the function of the wedge plate in embodiment 1. Generally, the first sawtooth microstructure 25 and the second sawtooth microstructure 26 have opposite sawtooth directions. In this embodiment, the wedge-shaped light guide plate 2 and the horn-shaped first auxiliary light guide plate 6 in the third embodiment are equivalent to a sawtooth microstructure with the same angle, and in some extremely thin or technological required scenes, the alternative scheme can be adopted for design and processing, so that the wedge-shaped light guide plate has extremely high processability, and is beneficial to large-scale production.
Example six: as shown in fig. 10, the light guide plate 2 is a parallel light guide plate, the first surface 21 is provided with a first sawtooth microstructure 25, the adhesive layer 3 is filled with the first sawtooth microstructure 25, one side of the light guide plate 2 facing the light source 1 is integrally provided with a second flat auxiliary light guide plate 7, a second sawtooth microstructure 26 is provided on a side of the second auxiliary light guide plate 7 on the same side as the first surface 21, and the sawtooth directions of the first sawtooth microstructure 25 and the second sawtooth microstructure 26 are opposite. Because the sawtooth-shaped microstructure can generate certain haze, in order to meet the requirement of transparency, the sawtooth-shaped microstructure is filled with the laminating layer material, and on the premise of not influencing the optical effect, the haze of the sawtooth-shaped microstructure is greatly reduced, so that the whole module still has extremely high transparency.
Claims (8)
1. The utility model provides a transparent one-way light source module that goes out, includes light source and light guide plate, the light guide plate include income plain noodles, first surface and second surface, its characterized in that the first surface on be provided with the laminating layer, the refracting index of light guide plate be greater than the laminating layer the refracting index.
2. The transparent unidirectional light-emitting source module of claim 1, wherein the refractive index of the light guide plate is greater than the refractive index of the adhesive layer by 0.05 or more.
3. The light source module as claimed in claim 1, wherein the light guide plate is a wedge-shaped light guide plate, and an included angle between the light incident surface and the first surface is 80-100 °.
4. The light source module as claimed in claim 3, wherein the second surface of the wedge-shaped light guide plate is provided with a protective layer, and the refractive index of the adhesive layer is greater than the refractive index of the protective layer.
5. A transparent unidirectional light-emitting module as claimed in claim 3, wherein a first auxiliary light guide plate having a horn shape is integrally disposed on a side of the wedge-shaped light guide plate facing the light source.
6. The module as claimed in claims 1 to 5, wherein the non-adhesive surface of the adhesive layer is provided with an inverted trapezoidal collimating microprism array.
7. A transparent unidirectional light-emitting module as claimed in claim 1, wherein the light guide plate is a parallel light guide plate, the second surface has saw-tooth microstructures, a second auxiliary light guide plate is integrally disposed on a side of the light guide plate facing the light source, the second auxiliary light guide plate has auxiliary saw-tooth microstructures on a side of the second auxiliary light guide plate on the same side as the second surface, and the saw-tooth microstructures have a saw-tooth direction opposite to that of the auxiliary saw-tooth microstructures.
8. A transparent unidirectional light-emitting module as claimed in claim 1, wherein the light guide plate is a parallel light guide plate, the first surface is provided with a sawtooth microstructure, the adhesive layer is filled with the sawtooth microstructure, a second auxiliary light guide plate is integrally provided on a side of the light guide plate facing the light source, an auxiliary sawtooth microstructure is provided on a side of the second auxiliary light guide plate on the same side as the first surface, and the sawtooth microstructure and the auxiliary sawtooth microstructure have opposite sawtooth directions.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110375043.8A CN113267844B (en) | 2021-04-08 | 2021-04-08 | Transparent one-way light-emitting light source module |
| PCT/CN2022/084945 WO2022213909A1 (en) | 2021-04-08 | 2022-04-02 | Transparent one-way light-emitting light source module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110375043.8A CN113267844B (en) | 2021-04-08 | 2021-04-08 | Transparent one-way light-emitting light source module |
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| Publication Number | Publication Date |
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| CN113267844A true CN113267844A (en) | 2021-08-17 |
| CN113267844B CN113267844B (en) | 2022-11-22 |
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| CN202110375043.8A Active CN113267844B (en) | 2021-04-08 | 2021-04-08 | Transparent one-way light-emitting light source module |
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| WO (1) | WO2022213909A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022213909A1 (en) * | 2021-04-08 | 2022-10-13 | 马鞍山晶智科技有限公司 | Transparent one-way light-emitting light source module |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023103797A1 (en) * | 2023-02-16 | 2024-08-22 | Zumtobel Lighting Gmbh | ARRANGEMENT FOR DISPLAYING INFORMATION |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN113267844B (en) | 2022-11-22 |
| WO2022213909A1 (en) | 2022-10-13 |
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