CN212434126U - Reflective display device and front light source module thereof - Google Patents
Reflective display device and front light source module thereof Download PDFInfo
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- CN212434126U CN212434126U CN202020967938.1U CN202020967938U CN212434126U CN 212434126 U CN212434126 U CN 212434126U CN 202020967938 U CN202020967938 U CN 202020967938U CN 212434126 U CN212434126 U CN 212434126U
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Abstract
A reflective display device and its front light source module, wherein the reflective display device includes display panel and front light source module, the front light source module is set up on display panel, the front light source module includes light guiding assembly and light source assembly, the light guiding assembly includes light conductor and multiple optical microstructure, the light conductor includes the first optical surface, second optical surface and at least a light incoming surface, the first optical surface is opposite to second optical surface, at least a light incoming surface links to the first optical surface and second optical surface; the plurality of optical microstructures are formed on at least one of the first optical surface and the second optical surface, and each optical microstructure is provided with at least one inclined side surface which is relatively inclined to one of the first optical surface and the second optical surface; the light source component is arranged beside the at least one light incident surface.
Description
Technical Field
The utility model relates to a display device especially relates to a reflective display device and leading light source module thereof.
Background
With the development and the increasing popularization of 5th Generation Mobile Networks (5G) communication technology, ultra-high speed communication has opened an infinite application scope for mass wireless data transmission, and the corresponding information receiving and displaying device will enter the era of ultra-high resolution and low power consumption. Expectable convenience of information transmission will greatly increase the time for using the display device, and in order to simultaneously achieve low power consumption and improve the eye protection for long-term viewing, the technical development of related components of a new generation of reflective display panel has become an important issue.
Unlike the conventional light-direct type display panel (such as LCD, OLED, micro led, etc.), the reflective display panel is similar to the light reflection characteristic of paper, and has the characteristics of high visibility in sunlight, power saving, and lightness and thinness.
SUMMERY OF THE UTILITY MODEL
The utility model provides a reflective display device and leading light source module thereof can improve the image luminance that reflective display device presented and cross the phenomenon such as low excessively and contrast is relatively poor, and then promotes reflective display device's environmental suitability.
The utility model provides a leading light source module is applied to reflective display device, a serial communication port, leading light source module contains leaded light subassembly and light source subassembly, and leaded light subassembly contains light conductor and a plurality of optical microstructure, and the light conductor contains first optical surface, second optical surface and at least one income plain noodles, and first optical surface and second optical surface are relative, and at least one income plain noodles is connected between first optical surface and second optical surface, and wherein first optical surface is close to the viewer side; the plurality of optical microstructures are formed on at least one of the first optical surface and the second optical surface, and each optical microstructure is provided with at least one inclined side surface which is relatively inclined to one of the first optical surface and the second optical surface; the light source component is arranged beside the at least one light incident surface.
In an embodiment of the present invention, the plurality of optical microstructures are formed on the first optical surface, and an included angle between the inclined side surface and the first optical surface is between 10 degrees and 90 degrees.
In an embodiment of the present invention, the plurality of optical microstructures are formed on the second optical surface, and an included angle between the inclined side surface and the second optical surface is between 10 degrees and 90 degrees.
In an embodiment of the present invention, the plurality of optical microstructures are protruding structures, recessed structures, or a combination of the protruding structures and the recessed structures. The raised structures may be cones, pyramids, trapezoidal-like bodies, polygonal bodies, or combinations thereof. The concave profile of the concave structure can be in an inverted cone shape, a chamfered cone shape, a trapezoid-like shape, a polygonal shape or a combination thereof.
In an embodiment of the present invention, the maximum structure width of the protruding structure is between 2 micrometers and 40 micrometers, and the structure height of the protruding structure is between 0.05 times and 2.5 times the maximum structure width. The maximum structure width of the concave structure is between 2 and 40 micrometers, and the structure depth of the concave structure is between 0.05 and 2.5 times the maximum structure width.
In an embodiment of the present invention, the inclined side is wavy.
In an embodiment of the present invention, the light guide is formed by layering and combining a single polymer material or two or more polymer materials, and the optical haze of the light guide is not greater than 25%.
In an embodiment of the present invention, the plurality of optical microstructures have different distribution densities on the light guide, wherein the distribution density of the optical microstructures is higher in a region farther from the light source module.
In an embodiment of the present invention, the light source assembly includes at least one LED element. In an embodiment, the light source assembly further includes a light angle converging element disposed between the LED element and the at least one light incident surface.
In an embodiment of the present invention, the light guide and the plurality of optical microstructures are integrally formed by a plastic material.
In an embodiment of the present invention, the light guide body includes a plastic substrate layer and a colloid layer, the colloid layer is disposed on the plastic substrate layer, and the plurality of optical microstructures are formed on the colloid layer.
In an embodiment of the present invention, the light guide assembly further includes a functional coating layer conformally covering the plurality of optical microstructures and the first optical surface and/or the second optical surface on which the plurality of optical microstructures are disposed.
The utility model provides a reflective display device, including display panel and leading light source module, leading light source module sets up on display panel, and leading light source module's second optical surface is towards display panel.
In an embodiment of the present invention, an air barrier layer is disposed between the second optical surface and the display panel.
In an embodiment of the present invention, a transparent adhesive medium layer is disposed between the second optical surface and the display panel, and a refractive index of the transparent adhesive medium layer is between 1.2 and 1.7.
In an embodiment of the present invention, the illumination beam incident from the at least one light incident surface is transmitted and reflected in the light guide element and exits to the display panel through the second optical surface, a part of the illumination beam is reflected as an image beam through the display panel, and the image beam exits to the viewer side through the light guide element and the first optical surface.
In an embodiment of the present invention, the reflective display device further includes a transparent conductive layer disposed on one of the first optical surface and the second optical surface, and a transparent conductive pattern layer disposed on the other of the first optical surface and the second optical surface.
In an embodiment of the present invention, the reflective display device further includes at least one retardation optical layer disposed between the display panel and the light guide element, or disposed between the light guide element and the viewer side.
The utility model discloses because of the reflection of the illuminating beam who borrows by leading light source module reaches display panel's image and presents, and wherein leading light source module's leaded light subassembly has optical microstructure, makes the illuminating beam distribution of outgoing to display panel in specific outgoing angle scope, and this will avoid when the external light source environment is not enough, and the image luminance that reflective display device presented is low excessively and contrast phenomenon such as relatively poor, and then can promote reflective display device's environmental suitability.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following preferred embodiments are described in detail with reference to the accompanying drawings.
Drawings
Fig. 1 is a schematic cross-sectional view of a reflective display device according to an embodiment of the present invention.
Fig. 2A to fig. 2C are schematic diagrams of different forms of the concave structure on a portion of the light guide according to an embodiment of the present invention.
Fig. 3A to fig. 3C are schematic diagrams of different forms of the protrusion structure on a portion of the light guide according to an embodiment of the present invention.
Fig. 4 is a schematic view of an optical microstructure according to another embodiment of the present invention on a portion of a light guide.
Fig. 5 is a schematic cross-sectional view of a light guide assembly according to an embodiment of the present invention.
Fig. 6 is a schematic cross-sectional view of a light guide assembly according to another embodiment of the present invention.
Fig. 7 is a schematic cross-sectional view of a reflective display device according to still another embodiment of the present invention.
Fig. 8 is a schematic cross-sectional view of a reflective display device according to still another embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic cross-sectional view illustrating a reflective display device 10 according to an embodiment of the present invention, as shown in the figure, the reflective display device includes a front light module 12 and a display panel 14, and the front light module 12 is disposed on the display panel 14. The front light module 12 includes a light guide assembly 16 and a light source assembly 18. As shown in fig. 1, the light guide assembly 16 includes a light guide 20 and a plurality of optical microstructures 22. The light guide 20 is, for example, a plate-shaped light guide having a first optical surface 201, a second optical surface 202 and an incident surface 203, the first optical surface 201 and the second optical surface 202 are opposite to each other, and the incident surface 203 is connected between the first optical surface 201 and the second optical surface 202, in an embodiment, the first optical surface 201 is close to the viewer 24 above, and the second optical surface 202 faces the display panel 14; the plurality of optical microstructures 22 are formed on at least one of the first optical surface 201 and the second optical surface 202, wherein each optical microstructure 22 has an inclined surface 221, the inclined surface 221 is inclined with respect to the first optical surface 201 or the second optical surface 202 where the optical microstructure 22 is located, and preferably, the inclined surface 221 faces the light incident surface 203. In the embodiment shown in fig. 1, the optical microstructures 22 are formed on the first optical surface 201, for example, an included angle θ is formed between the inclined side surface 221 of the optical microstructures 22 and the first optical surface 201, the included angle θ is between 10 degrees and 90 degrees, and the distribution characteristic of the light emitting angle of the light guide element 16 is adjusted by selecting the included angle θ. However, in an embodiment not shown, the optical microstructures 22 may be formed on the second optical surface 202, or on both the first optical surface 201 and the second optical surface 202, wherein the included angle between the inclined side 221 of the optical microstructure 22 formed on the second optical surface 202 and the second optical surface 201 may be between 10 degrees and 90 degrees.
As shown in fig. 1, the light source assembly 18 is disposed beside the light incident surface 203, and the illumination light beam L1 emitted by the light source assembly 18 enters the light guide assembly 16 through the light incident surface 203, is transmitted in the light guide assembly 16, is reflected by the inclined side surface 221 of the optical microstructure 22, and then exits through the surface of the second optical structure 203 to be emitted to the display panel 14. In one embodiment, the plurality of optical microstructures 22 have different distribution densities on the light guide 20, wherein the distribution density of the optical microstructures 22 is higher in the regions farther away from the light source element 18, so that the illumination light beam L1 is uniformly emitted from the second optical surface 202 by the density distribution of the optical microstructures 22, and most of the emitted illumination light beam L1 is distributed within a specific emission angle range.
The optical microstructures 22 may be a concave structure 22A, a convex structure 22B, or a combination of both, and preferably, the optical microstructures 22 are concave structures 22A, wherein the concave structures 22A are, for example, pit-like concave structures, and the convex structures 22B are, for example, granular convex structures. As shown in fig. 1, a plurality of recessed structures 22A are formed on the first optical surface 201, and fig. 2A to fig. 2C are schematic diagrams of a portion of the light guide body with different recessed structures according to embodiments of the present invention, respectively, as shown in fig. 2A, the recessed profile of the recessed structure 22A is in an inverted cone shape, wherein the side of the inverted cone shape is used as the inclined side 221 of the optical microstructure 22, and in an unillustrated embodiment, the recessed profile may also be in a truncated inverted cone shape; as shown in fig. 2B, the concave profile of the concave structure 22A is in a shape of a truncated pyramid, such as an inverted quadrangular pyramid, wherein the side surface of the truncated pyramid is used as the inclined side surface 221 of the optical microstructure 22; as shown in fig. 2C, the recess profile of the recess structure 22A has a trapezoid-like shape, wherein the side of the trapezoid-like shape serves as the inclined side 221 of the optical microstructure 22. However, the recessed contour may be in the shape of other polygonal bodies. The shapes of the recess profiles of the recess structures 22A on the first optical surface 201 or the second optical surface 202 may be the same or different.
Fig. 3A to 3C are schematic diagrams of different aspects of the protruding structure on a portion of the light guide body according to an embodiment of the present invention, and as shown in fig. 3A, the protruding structure 22B is a cone, and a side surface of the cone is used as an inclined side surface 221 of the optical microstructure 22, and in an embodiment not shown, the protruding structure 22B may also be a truncated cone. As shown in fig. 3B, the protruding structures 22B are pyramids, such as quadrangular pyramids, wherein the sides of the pyramids serve as the inclined sides 221 of the optical microstructures 22, and in the embodiment not shown, the protruding structures 22B can be truncated pyramids; as shown in fig. 3C, the protruding structures 22B are trapezoidal-like bodies, wherein the side faces of the trapezoidal-like bodies serve as the inclined side faces 221 of the optical microstructures 22. However, the protruding structure 22B may be other polygonal shapes. The shapes of the protruding structures 22B on the first optical surface 201 or the second optical surface 202 may be the same or different, or the first optical surface 201 or the second optical surface 202 may be formed with the same or different protruding structures 22B and the same or different recessed structures 22A at the same time.
Also, the inclined side 221 is not limited to be a flat surface, fig. 4 is a schematic view of a portion of the light guide body having an optical microstructure according to another embodiment of the present invention, as shown in fig. 4, taking the optical microstructure 22 as a protruding structure 22B, a top side of the protruding structure 22B has a curved ridge 222, and the inclined side 221 undulates along the curved ridge 222.
In various embodiments of the optical microstructure 22, as shown in fig. 2A to 2C, the maximum structure width W1 of the recessed structure 22A is between 2 microns and 40 microns, and the structure depth D1 of the recessed structure 22A is between 0.05 times and 2.5 times the maximum structure width W1. As shown in fig. 3A to 3C and fig. 4, the maximum structure width W2 of the protruding structure 22B is between 2 microns and 40 microns, and the structure height D2 of the protruding structure is between 0.05 times and 2.5 times the maximum structure width W2. The maximum structure widths W1 and W2 are defined as the maximum horizontal dimension of the three-dimensional optical microstructure 22, and the structure depth D1 and the structure height D2 are defined as the vertical height of the three-dimensional optical microstructure 22.
As shown in fig. 1, the light source assembly 18 includes an LED element 181, and an illumination light beam L1 generated by the LED element 181 enters the light guide assembly 16 through the light incident surface 203 and is reflected to the second optical surface 202 through the inclined surface 221. The light source assembly 18 further includes a light angle converging element (not shown) disposed between the light emitting side of the LED element 181 and the light incident surface 203 of the light guide 20, such as a micro lens set, a light guide, and a micro cylindrical lens array, for adjusting the angular distribution of the illumination beam L1 of the LED element 181 before entering the light guide assembly 116.
The light guide 20 may be formed by layering a single polymer material or two or more polymer materials, and the optical haze of the light guide 20 is not greater than 25%. In one embodiment, the light guide assembly 16 has high transparency, and as shown in fig. 1, the light guide 20 and the plurality of optical microstructures 22 are integrally formed by a plastic material, such as Polycarbonate (PC). In another embodiment, fig. 5 is a schematic cross-sectional view illustrating a light guide assembly according to an embodiment of the present invention, as shown in fig. 5, the light guide 20A may include a plastic substrate layer 201 and a colloid layer 202, the plastic substrate layer 201 is made of, for example, a polycarbonate material layer, the colloid layer 202 is disposed on the plastic substrate layer 201, and a plurality of optical microstructures 22 are formed on the colloid layer 202, wherein a refractive index of the plastic substrate layer 201 is, for example, 1.59, and a refractive index of the colloid layer 202 is, for example, 1.38 to 1.72.
Fig. 6 is a schematic cross-sectional structure view of a light guide assembly according to another embodiment of the present invention, as shown in the figure, the light guide assembly 20B further includes a functional plating layer 26 conformally covering the plurality of optical microstructures 22 and the first optical surface 201 where the plurality of optical microstructures 22 are located, so as to achieve the effects of scratch resistance, reflection resistance and glare resistance, in the embodiment shown in fig. 6, the optical microstructures 22 are taken as the protruding structures 22B for illustration, but not limited thereto.
Continuing to refer to FIG. 1, in one embodiment, an air barrier layer 28 is disposed between the second optical surface 202 and the display panel 14. In an embodiment not shown, a transparent adhesive medium layer may also be disposed between the second optical surface 202 and the display panel 14, and the refractive index of the transparent adhesive medium layer is between 1.2 and 1.7. As shown in fig. 1, the illumination light beam L1 incident from the light incident surface 203 exits to the display panel 14 through the second optical surface 202, a portion of the illumination light beam L1 is reflected by the display panel 14 as an image light beam Li, and the image light beam Li passes through the light guide assembly 16 and exits to the viewer 24 through the first optical surface 201. In the embodiment of the present invention, the image of the display panel 14 is reflected by the illuminating light beam L1 of the front light source module 12, so that it is able to avoid the phenomenon that the brightness of the image displayed by the reflective display device 10 is too low and the contrast is poor when the environment of the external light source is not enough, and the environmental adaptability of the reflective display device 10 can be improved.
Fig. 7 is a schematic cross-sectional view of a reflective display device according to still another embodiment of the present invention, as shown in the figure, the main difference between the reflective display device 10A shown in fig. 7 and the reflective display device 10 shown in fig. 1 is that the reflective display device 10A further includes a transparent conductive layer 30 and a transparent conductive pattern layer 32, the transparent conductive layer 30 is disposed on one of the first optical surface 201 and the second optical surface 202, and the transparent conductive pattern layer 32 is disposed on the other of the first optical surface 201 and the second optical surface 202. In the embodiment shown in fig. 7, the transparent conductive layer 30 is disposed on the first optical surface 201, and the transparent conductive pattern layer 32 with the coding pattern design is disposed on the second optical surface 202, so that the reflective display device 10A has a touch function.
Fig. 8 is a schematic cross-sectional view of a reflective display device according to still another embodiment of the present invention, and as shown in the figure, the main difference between the reflective display device 10B shown in fig. 8 and the reflective display device 10 shown in fig. 1 is that the reflective display device 10B further includes at least one retardation optical layer 34 disposed between the display panel 14 and the light guide element 16, or/and disposed between the light guide element 16 and the viewer 24. In the embodiment shown in fig. 7, the retardation optical layer 34 is disposed between the light guide element 16 and the display panel 14, and in one embodiment, the retardation optical layer 34 is a quarter-wave plate, so that the reflective display device 10B is suitable for the viewer 24 wearing sunglasses.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make many modifications or equivalent variations by using the above disclosed method and technical contents without departing from the technical scope of the present invention, but all the simple modifications, equivalent variations and modifications made by the technical spirit of the present invention to the above embodiments are within the scope of the technical solution of the present invention.
Claims (20)
1. A front light module applied to a reflective display device, the front light module comprising:
a light guide assembly including a light guide and a plurality of optical microstructures,
the light guide body comprises a first optical surface, a second optical surface and at least one light incident surface, the first optical surface is opposite to the second optical surface, the at least one light incident surface is connected between the first optical surface and the second optical surface, and the first optical surface is close to a viewer side;
the plurality of optical microstructures are formed on at least one of the first optical surface and the second optical surface, and each of the plurality of optical microstructures has at least one inclined side surface which is relatively inclined to one of the first optical surface and the second optical surface; and
and the light source component is arranged beside the at least one light incident surface.
2. The front light module of claim 1, wherein the plurality of optical microstructures are formed on the first optical surface, and the angle between the inclined side surface and the first optical surface is between 10 degrees and 90 degrees.
3. The front light module of claim 1, wherein the plurality of optical microstructures are formed on the second optical surface, and the angle between the inclined side surface and the second optical surface is between 10 degrees and 90 degrees.
4. The front light module of claim 1, wherein the plurality of optical microstructures are raised structures, recessed structures, or a combination thereof.
5. The front light module of claim 4, wherein the raised structures are cones, pyramids, trapezoidal-like bodies, polygonal bodies, or combinations thereof.
6. The front light module of claim 4, wherein a concave profile of the concave structure is in the shape of an inverted cone, a chamfered cone, a trapezoid-like shape, a polygon, or a combination thereof.
7. The front light module of claim 4, wherein a maximum structure width of the protruding structures is between 2 microns and 40 microns, and a structure height of the protruding structures is between 0.05 times and 2.5 times the maximum structure width.
8. The front light module of claim 4, wherein the recessed features have a maximum feature width of between 2 microns and 40 microns and a feature depth of between 0.05 and 2.5 times the maximum feature width.
9. The front light module of claim 1, wherein said sloped side is undulating.
10. The front light module of claim 1, wherein the light guide has an optical haze of no greater than 25%.
11. The front-light module of claim 1, wherein the light source assembly comprises at least one LED element.
12. The front-light module of claim 11, wherein the light source assembly further comprises a light angle converging element disposed between the LED element and the at least one light incident surface.
13. The front-light module of claim 1, wherein the light guide and the plurality of optical microstructures are integrally formed of a plastic material.
14. The front light module of claim 1, wherein the light guide body comprises a plastic substrate layer and a colloidal layer disposed on the plastic substrate layer, and the plurality of optical microstructures are formed on the colloidal layer.
15. The front-light module of claim 1, wherein the light guide assembly further comprises a functional coating conformally covering the plurality of optical microstructures and the first optical surface and/or the second optical surface on which the plurality of optical microstructures are located.
16. A reflective display device, comprising:
a display panel; and
the front light module of any one of claims 1-15 disposed on the display panel, the second optical surface of the front light module facing the display panel.
17. The reflective display device of claim 16, wherein an air barrier is between said second optical surface and said display panel.
18. The reflective display device of claim 16, wherein a transparent adhesive medium layer is between the second optical surface and the display panel, and the transparent adhesive medium layer has a refractive index between 1.2 and 1.7.
19. The reflective display device according to claim 16, further comprising a transparent conductive layer disposed on one of the first optical surface and the second optical surface and a transparent conductive pattern layer disposed on the other of the first optical surface and the second optical surface.
20. The reflective display device according to claim 16, further comprising at least one retardation optical layer disposed between the display panel and the light guide element or between the light guide element and the viewer side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020967938.1U CN212434126U (en) | 2020-06-01 | 2020-06-01 | Reflective display device and front light source module thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020967938.1U CN212434126U (en) | 2020-06-01 | 2020-06-01 | Reflective display device and front light source module thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113763806A (en) * | 2020-06-01 | 2021-12-07 | 四川龙华光电薄膜股份有限公司 | Reflective display device and front light source module thereof |
| WO2023216416A1 (en) * | 2022-05-12 | 2023-11-16 | 苏州维旺科技有限公司 | High light splitting ratio light guide plate, manufacturing method therefor, light source module and display assembly |
-
2020
- 2020-06-01 CN CN202020967938.1U patent/CN212434126U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113763806A (en) * | 2020-06-01 | 2021-12-07 | 四川龙华光电薄膜股份有限公司 | Reflective display device and front light source module thereof |
| WO2023216416A1 (en) * | 2022-05-12 | 2023-11-16 | 苏州维旺科技有限公司 | High light splitting ratio light guide plate, manufacturing method therefor, light source module and display assembly |
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Effective date of registration: 20220818 Address after: No. 5, Fengwu Road, Wujia Town, Fucheng District, Mianyang City, Sichuan Province, 621000 Patentee after: Longhua Phase New Materials (Mianyang) Co., Ltd. Address before: 621000 No. 29, Fenghuang Middle Road, high end equipment manufacturing industrial park, Fucheng District, Mianyang City, Sichuan Province Patentee before: Sichuan Longhua Film Co.,Ltd. |