Front light guide plate structure with wide viewing angle

Abstract

The utility model discloses a front light guide plate structure with a wide viewing angle. The front light guide plate structure comprises an electronic paper module, the light guide plate is arranged on the surface of the electronic paper module; the surface microstructure is arranged between the electronic paper module and the light guide plate; when the same light enters the light guide plate, the refraction angle of the light is changed through the surface microstructure, and then the light emitting angle of the electronic paper module is increased. According to the utility model, the special surface microstructure is arranged, and the optimized design is adopted, so that the screen can present an excellent visual effect and excellent color expressive force at any visual angle.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic paper display, in particular to a front light guide plate structure with a wide viewing angle. Background Technique

[0002] Electronic paper display products have advantages such as eye protection, low power consumption, and environmental friendliness. Due to its own characteristic limitations, it cannot use the backlight source method to provide light, but needs to reflect ambient light to achieve the display effect of the screen. When there is no ambient light at night, a front light source needs to be used, and the front light guide plate can effectively distribute the light of the front light source evenly on the entire screen, so as to achieve a high-quality display effect.

[0003] The traditional front light module consists of an LED light source, a front light guide plate, and an electronic paper module. One side of the front light guide plate is a light guide dot, and the other side is a smooth surface. The smooth surface of the front light guide plate is attached to the surface of the electronic paper. After the light enters the front light guide plate, it refracts towards the electronic paper, and the electronic paper reflects the light, thereby realizing the display and viewing of the picture on the electronic paper.

[0004] The disadvantage of the prior art is that the viewing angle of the picture is affected by the light output angle of the light. The light output angle is determined by the materials of the electronic paper surface and the front light guide plate. The traditional electronic paper module cannot view the picture at a large angle, which affects the user experience. Content of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art. To achieve the above purpose, a front light guide plate structure with a wide viewing angle is adopted to solve the problems raised in the above background technique.

[0006] A front light guide plate structure with a wide viewing angle includes:

[0007] An electronic paper module;

[0008] A light guide plate disposed on the surface of the electronic paper module; and

[0009] A surface microstructure disposed between the electronic paper module and the light guide plate;

[0010] When the same light enters the light guide plate, the refraction angle of the light is changed through the surface microstructure, thereby increasing the light output angle of the electronic paper module.

[0011] As a further scheme of the utility model: The light guide plate is provided with light guide dots for uniform light distribution. By setting light guide dots on the light guide plate, the uniform light distribution effect can be significantly improved, the appearance of light spots and dark areas can be reduced, and the light emitted by the backlight module is softer and more uniform, thereby improving the visual experience of the electronic paper display device.

[0012] As a further solution of the present utility model: The light guide dots are selected as concave dots or convex dots according to the actual needs of the light guide plate. The design allows for the selection of the most suitable type of light guide dots according to specific application scenarios and light requirements. Concave dots may be more suitable for scenarios that require strong light diffusion, while convex dots may be better at directing light. This customized design further enhances the light control ability and utilization efficiency, making the backlight module more adaptable to diverse display requirements.

[0013] As a further solution of the present utility model: The thickness of the light guide plate is between 0.1 mm and 0.4 mm, and the materials used are PC, PMMA, or MS materials. Selecting these thin and high light transmittance materials and combining with a suitable thickness range not only reduces the overall weight of the backlight module, but also improves the light transmittance and reduces light loss. At the same time, these materials have good weather resistance and processing performance, ensuring the stability and durability of the backlight module and extending the service life of the electronic paper display device.

[0014] As a further solution of the present utility model: An LED lamp group is arranged on the side of the light guide plate. Arranging the LED lamp group on the side of the light guide plate as the light source can efficiently utilize the light emitted by the LED lamp and achieve uniform light distribution through the guiding effect of the light guide plate. This design not only simplifies the structure of the backlight module, but also reduces energy consumption and improves energy utilization efficiency, making the electronic paper display device more energy-saving and environmentally friendly.

[0015] As a further solution of the present utility model: The surface microstructure adopts three different structural designs of concave structure, U-shaped structure, and V-shaped structure, and the preferred structure is the V-shaped structure. The V-shaped surface microstructure can more effectively control the scattering and reflection of light, further enhancing the light uniformity and softness. This design helps to reduce glare and reflection phenomena and improve the viewing comfort. Especially in strong light environments, it can still maintain a clear display effect.

[0016] As a further solution of the present utility model: The depth range of the surface microstructure is between 20 microns and 40 microns. Precise control of the depth range of the surface microstructure can precisely adjust the scattering angle and intensity of light, thereby achieving fine control of light distribution. This design ensures the best visual effect of light on the electronic paper surface, neither being too dazzling nor too dim, providing the best reading or viewing experience for users.

[0017] As a further solution of the present utility model: an included angle is formed between the surface microstructure and the electronic paper module, and the range of the included angle is 10 degrees to 15 degrees. The incident angle and reflection path of light are optimized, so that the light is more in line with the display characteristics of the electronic paper module. This design helps to improve the contrast and color saturation of the picture, making the display effect more vivid and enhancing the user's visual enjoyment.

[0018] Compared with the prior art, the present utility model has the following technical effects:

[0019] By adopting the above technical solution, based on the light guide plate and the electronic paper module, a surface microstructure is arranged therein, and thus by processing a special structure on the lower surface of the light guide plate, the refraction angle and light output angle of light are increased, thereby enhancing the viewing angle for use and viewing, and providing a better use and viewing experience for customers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following will describe in detail the specific embodiments of the present utility model with reference to the drawings:

[0021] Figure 1 It is a schematic structural diagram of the front light guide plate structure of the disclosed embodiment of the present application;

[0022] Figure 2 It is a schematic diagram of simulating the existing front light guide plate of the disclosed embodiment of the present application;

[0023] Figure 3 It is a schematic diagram of the light reflection angle of the front light guide plate with a concave structure of the disclosed embodiment of the present application;

[0024] Figure 4 It is a schematic diagram of the light reflection angle of the front light guide plate with a U-shaped structure of the disclosed embodiment of the present application;

[0025] Figure 5 It is a schematic diagram of the light reflection angle of the front light guide plate with a V-shaped structure of the disclosed embodiment of the present application;

[0026] Figure 6 It is a schematic diagram of the reflection and parameters of three structures, namely, the concave structure, the U-shaped structure and the V-shaped structure of the disclosed embodiment of the present application;

[0027] Figure 7 It is a schematic diagram of the depth and included angle of the surface microstructure of the disclosed embodiment of the present application;

[0028] Figure 8 It is a schematic diagram of the steps for adjusting the surface microstructure of the disclosed embodiment of the present application.

[0029] In the figure: 1. Electronic paper module; 2. Light guide plate; 3. Surface microstructure; 4. Light guide dots; 5. LED lamp group. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] Please refer to Figure 1 , in the embodiments of the present utility model, a front light guide plate structure with a wide viewing angle includes an electronic paper module 1, a light guide plate 2, and a surface microstructure 3;

[0032] As Figure 2 shown, the figure is a schematic diagram of simulating an existing front light guide plate 2; after simulating the traditional front light guide plate 2 is attached to the electronic paper, when light enters and is reflected by the electronic paper, due to the refractive index problem of the material, there is no light at a certain angle, and the angle without light is about 50 degrees, so the picture cannot be viewed at this angle.

[0033] Electronic paper module 1;

[0034] A light guide plate 2 provided on the surface of the electronic paper module 1; and

[0035] A surface microstructure 3 provided between the electronic paper module 1 and the light guide plate 2;

[0036] When the same light enters the light guide plate 2, the refraction angle of the light is changed through the surface microstructure 3, thereby increasing the light output angle of the electronic paper module 1.

[0037] Under the same material and parameters, after the light guide plate 2 with the surface microstructure 3 is attached to the electronic paper module 1, when the same light enters, due to the influence of the microstructure on the lower surface of the front light guide plate 2, the refraction angle of the light is changed, making the light output angle larger, and the angle without light is less than 20 degrees, so that the picture on the electronic paper can be viewed at a larger angle, improving the user experience;

[0038] In this embodiment, the light guide plate 2 is provided with light guide dots 4 for uniform light distribution, and the light guide dots 4 are selected as concave dots or convex dots according to the actual needs of the light guide plate 2.

[0039] In a specific implementation, in the actual production process, the dot processing technology is first used to accurately produce the light guide dots 4 of the front light guide plate 2 on the surface of the material. These dots are not only numerous but also evenly distributed, ensuring the delicate and clear display effect of the screen. After the dot production is completed, the other side of the front light guide plate 2 is processed to produce a V-shaped microstructure according to the above requirements. This step-by-step processing method not only ensures the quality and performance of the light guide plate 2, but also improves production efficiency.

[0040] In this embodiment, the thickness of the light guide plate 2 is in a range of 0.1 mm to 0.4 mm, and the material used is PC, PMMA, or MS.

[0041] In a specific embodiment, the light guide plate 2 is made of PC / PMMA / MS with a thickness of 0.1 to 0.4 mm. These materials are particularly suitable for making the light guide plate 2 due to their good transparency, high strength, weather resistance and processing performance. The light guide plate 2 is composed of a light guide grid 4 structure on the upper surface and a surface microstructure 3 on the lower surface. The lower surface is closely attached to the electronic paper module 1, while the upper surface is covered with carefully designed light guide grids 4, which function to efficiently and evenly distribute the light of the LED light group 5 to ensure that the screen can show excellent brightness and consistency at any angle.

[0042] In this embodiment, an LED light group 5 is disposed on the side of the light guide plate 2 .

[0043] In this embodiment, the surface microstructure 3 adopts three different structural designs: a concave structure, a U-shaped structure and a V-shaped structure, and the preferred structure is the V-shaped structure.

[0044] Specifically, the surface microstructure 3 on the lower surface of the light guide plate 2 is arranged perpendicular to the LED light group 5. This design cleverly changes the angle of incident light and reflected light from the electronic paper, further optimizes the light utilization efficiency, and enhances the contrast and color saturation of the screen.

[0045] like Figure 3 As shown, the figure is a schematic diagram of the light reflection angle of the front light plate of the concave structure;

[0046] like Figure 4 As shown, the figure is a schematic diagram of the light reflection angle of the front light plate of the U-shaped structure;

[0047] In order to find the most ideal microstructure type, three different structural designs, namely concave, U-shaped and V-shaped, were compared by simulating the refraction path of light in the microstructure.

[0048] like Figure 5 As shown, the figure is a schematic diagram of the light reflection angle of the front light plate of the V-shaped structure;

[0049] likeFigure 6 As shown, it is a schematic diagram of the reflection and parameters of three structures: concave structure, U-shaped structure, and V-shaped structure;

[0050] In the figure, the structural depths, structural radii, light reflection angles, and the positional relationships of the structural angles of the three structures of the concave structure, U-shaped structure, and V-shaped structure are shown;

[0051] As shown in the following table, it is a schematic diagram of the parameters of different structures;

[0052] Structure Structure depth Structure included angle / radius Refraction angle after reflection Reflection brightness Flat plate None None 40 degrees 100％ V-shaped structure plate Depth 20 - 40 um 10 - 15 degrees 70 - 80 degrees 100％ Concave structure plate Depth 20 - 40 um 5 - 20 degrees 60 degrees 80％ U-shaped structure plate Depth 20 - 40 um 5 - 20 degrees 50 degrees 70％

[0053] The simulation results show that the concave and U-shaped structures only meet certain expected design requirements in terms of light refraction effect, while the V-shaped structure perfectly meets the performance indicators of the light guide plate 2.

[0054] In this embodiment, the depth range of the surface microstructure 3 is between 20 micrometers and 40 micrometers. An angle is formed between the surface microstructure 3 and the electronic paper module 1, and the angle range is between 10 degrees and 15 degrees.

[0055] Specifically, the reason why the V-shaped structure can be perpendicular to the LED lamp beads and effectively guide light is that its depth control and the angle with the electronic paper have been precisely designed and optimized. Through repeated tests and verifications, the optimal parameter range of the V-shaped structure has been finally determined; the depth of the structure is controlled between 20 and 30 micrometers to maintain a moderate refraction effect;

[0056] As Figure 7 shown, it is a schematic diagram of the depth and angle of the surface microstructure 3;

[0057] At the same time, the angle between the V-shaped structure and the electronic paper is set between 10 degrees and 15 degrees. This angle can not only ensure the uniform distribution of light on the screen but also effectively prevent excessive light scattering resulting in a decrease in brightness.

[0058] In the specific implementation manner, the light guide plate 2 and the electronic paper module 1 are seamlessly bonded by using OCA optical adhesive to form a tightly integrated whole. On this basis, with the light source module of the high-performance LED lamp group 5, a fully functional front light module is successfully constructed. This module not only has a stable light source and controllable brightness, but also due to the adoption of the optimized V-shaped micro-structure design, the screen can present excellent visual effects and outstanding color expressiveness at any viewing angle.

[0059] The specific process of the design method for the structure of the front light guide plate 2 is as follows:

[0060] 1. Set light guide dots 4 on the outer surface of the light guide plate 2;

[0061] 2. Then, a surface microstructure 3 is provided on the inner surface of the light guide plate 2, the depth range of the surface microstructure 3 is adjusted, and the included angle range between the surface microstructure 3 and the electronic paper module 1 is controlled.

[0062] 3. Based on the full lamination process, the light guide plate 2 with the surface microstructure 3 is combined with the electronic paper module 1, and an LED lamp group 5 is arranged on the side of the light guide plate 2 to obtain a preliminary front light guide plate 2.

[0063] 4. The obtained front light guide plate 2 is repeatedly tested and verified, and based on the simulation display results, the final front light guide plate 2 is determined.

[0064] In this embodiment, as Figure 8 shown, the figure is a schematic diagram of the steps for adjusting the surface microstructure 3.

[0065] Among them, the specific steps for adjusting the depth range of the surface microstructure 3 and controlling the included angle range between the surface microstructure 3 and the electronic paper module include:

[0066] Set the material parameters of the product structure components in the simulation software.

[0067] Structures with different shapes and sizes are arranged at the bottom of the light guide plate, where the structures include concave structures, U-shaped structures, and V-shaped structures.

[0068] Then, use the light ray simulation function in the simulation software to perform simulation and simulate the influence of the structures on the light rays.

[0069] According to the refraction effects of different structures in the simulation, adjust the depth and angle of the structure shapes.

[0070] Then, through continuous parameter iteration, the optimal structure shapes and parameters are finally obtained.

[0071] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents, and all should be included within the protection scope of the present invention.

Claims

1. A front light guide plate structure with a wide viewing angle, characterized in that, Including: An electronic paper module (1); A light guide plate (2) disposed on the surface of the electronic paper module; And A surface microstructure (3) disposed between the electronic paper module and the light guide plate; When the same light enters the light guide plate, the refraction angle of the light is changed through the surface microstructure, thereby increasing the light output angle of the electronic paper module.

2. The front light guide plate structure with a wide viewing angle according to claim 1, wherein The light guide plate is provided with light guide dots (4) for uniform light distribution.

3. The front light guide plate structure with a wide viewing angle according to claim 2, characterized in that, The light guide dots are selected as concave dots or convex dots according to the actual needs of the light guide plate.

4. The front light guide plate structure with a wide viewing angle according to claim 2, characterized in that The thickness of the light guide plate is between 0.1 mm and 0.4 mm, and the material used is PC, PMMA, or MS material.

5. The front light guide plate structure with a wide viewing angle according to claim 4, characterized in that An LED lamp group (5) is disposed on the side of the light guide plate.

6. The front light guide plate structure with a wide viewing angle according to claim 1, characterized in that, The surface microstructure adopts three different structural designs: a concave structure, a U-shaped structure, and a V-shaped structure.

7. The front light guide plate structure with a wide viewing angle according to claim 6, characterized in that, The depth range of the surface microstructure is between 20 microns and 40 microns.

8. The front light guide plate structure with a wide viewing angle according to claim 7, characterized in that, An included angle is formed between the surface microstructure and the electronic paper module, and the included angle range is 10 degrees to 15 degrees.

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