Backlight structure and display device comprising same

Abstract

The backlight structure comprises a light source, a light guide plate and an optical film set, the light guide plate is provided with a light inlet face and a light outlet face, and the light source is arranged on one side of the light outlet face; wherein the light inlet surface of the light guide plate is of a plane structure, the light outlet surface of the light guide plate is provided with a plurality of microstructures, the microstructures are hemispherical protrusions, the radius range of the hemispherical protrusions is 10-30 micrometers, and the distance between the microstructures of the hemispherical protrusions is 40-150 micrometers. According to the backlight structure, the light inlet face of the light guide plate is designed according to a plane, the light outlet face of the light guide plate is provided with a plurality of microstructures, and the microstructures are hemispherical protrusions. The microstructures can change the emergent direction of light rays, so that the light rays are uniformly distributed in a relatively large angle range.

Description

Technical Field

[0001] This utility model relates to the field of backlight structure technology, and more specifically, to a backlight structure and a display device including the backlight structure. Background Technology

[0002] Existing backlight display technologies suffer from limited viewing angles, resulting in noticeable differences in brightness and color when viewed from different angles, impacting user experience. Current solutions for improving viewing angles often suffer from drawbacks such as complex structures, high costs, or poor performance. Utility Model Content

[0003] The purpose of this invention is to provide a backlight structure and a display device containing the same, in order to partially solve the aforementioned technical problems.

[0004] Specifically, the technical solution of this utility model is as follows:

[0005] On one hand, a backlight structure is proposed, including a light source, a light guide plate, and an optical film assembly. The light guide plate has a light-incident surface and a light-exit surface, and the light source is disposed on one side of the light-exit surface. The light-incident surface of the light guide plate is designed as a planar structure, and the light-exit surface of the light guide plate has multiple microstructures. The microstructures are hemispherical protrusions with a radius ranging from 10 to 30 micrometers and a spacing between the microstructures of the hemispherical protrusions ranging from 40 to 150 micrometers.

[0006] As a preferred technical solution, the distribution density of the hemispherical protrusions gradually increases from the central region to the edge region of the light guide plate, with a distribution density of 800 to 2000 per square centimeter in the central region and 2000 to 4000 per square centimeter in the edge region.

[0007] As a preferred technical solution, the optical film assembly includes a diffusion film, a brightness enhancement film, and a reflective film, with the diffusion film and the brightness enhancement film sequentially disposed on one side of the light-emitting surface of the light guide plate.

[0008] As a preferred technical solution, the surface of the reflective film has a metal reflective layer, which can reflect light that has not been emitted from the light-emitting surface back to the light guide plate, thereby improving the utilization rate of light.

[0009] As a preferred technical solution, the reflective film is disposed on the light-incident surface of the light guide plate.

[0010] As a preferred technical solution, the thickness of the reflective film is 3 to 6 micrometers.

[0011] As a preferred technical solution, the light guide plate is a plate made of an isotropic material layer.

[0012] As a preferred technical solution, the light guide plate is a rigid polymethyl methacrylate light guide plate.

[0013] On the other hand, a display device is proposed, including a backlight structure as described above, wherein the backlight structure is disposed on the non-display side of the display device.

[0014] As a preferred technical solution, the display device further includes an upper polarizer, which is disposed on the display side of the display device, and the transmission axis of the upper polarizer is parallel or perpendicular to the transmission axis of the brightness enhancement film.

[0015] The beneficial effects of this invention are as follows: The light guide plate in the backlight structure is designed with a planar light-incident surface, and the light-exit surface of the light guide plate has multiple microstructures, which are hemispherical protrusions. These microstructures can change the direction of light emission, allowing the light to be evenly distributed over a large angular range. The radius of the hemispherical microstructures ranges from 10 to 30 micrometers. The spacing between the microstructures is 40 to 150 micrometers. The distribution density of the microstructures gradually increases from the central area to the edge area of ​​the light guide plate, with a density of 800 to 2000 per square centimeter in the central area and 2000 to 4000 per square centimeter in the edge area. This distribution method effectively improves the uniformity of light emission at different angles, ensuring even distribution of light over a large angular range, effectively expanding the viewing angle range, and resulting in a more uniform and consistent display effect when viewed from different angles. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a backlight structure stacking according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the light-incident surface and light-exit surface of a light guide plate according to an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached drawings: 1. Light guide plate; 11. Light incident surface; 12. Light emitting surface; 121. Microstructure; 2. Light source; 3. Reflective film; 4. Lower diffuser; 5. Lower brightening agent; 6. Upper brightening agent; 7. Light shielding adhesive; 8. FPC; 9. FPC double-sided adhesive; 10. Adhesive frame. Detailed Implementation

[0020] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0021] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0022] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0023] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0024] It should be noted that "multiple" as mentioned in this article refers to two or more.

[0025] Example

[0026] like Figure 1-2 The diagram shown is a schematic representation of a backlight structure stacking according to this embodiment. The backlight structure includes a light source 2, a light guide plate 1, and an optical film assembly. The light guide plate 1 has a light-incident surface 11 and a light-emitting surface 12. The LED light source 2 is disposed on one side of the light-emitting surface 12. The light-incident surface 11 of the light guide plate 1 is planar, and the light-emitting surface 12 of the light guide plate 1 has multiple microstructures 121. Each microstructure 121 is a hemispherical protrusion with a radius ranging from 10 to 30 micrometers, and the spacing between the hemispherical protrusions and the microstructures 121 is 40 to 150 micrometers. An FPC8 for the backlight structure is also disposed on one side of the light-emitting surface 12 of the light guide plate 1, and the FPC8 is attached to the light guide plate 1 using FPC double-sided adhesive 9.

[0027] Preferably, the distribution density of the hemispherical protrusions 121 gradually increases from the central region to the edge region of the light guide plate 1, with a distribution density of 800 to 2000 per square centimeter in the central region and 2000 to 4000 per square centimeter in the edge region. This distribution method can effectively improve the uniformity of light emission at different angles, enabling the light to be evenly distributed over a large angular range.

[0028] Preferably, the optical film assembly includes a diffusion film, a brightness enhancement film, and a reflective film 3, with the diffusion film and the brightness enhancement film sequentially disposed on one side of the light-emitting surface 12 of the light guide plate 1. Specifically, the diffusion film includes a lower diffusion film 4, and the brightness enhancement film includes an upper brightness enhancement film 6 and a lower brightness enhancement film 5. A ring of light-shielding adhesive 7 is also disposed on the upper brightness enhancement film 6.

[0029] Preferably, the surface of the reflective film 3 has a metal reflective layer, which can reflect light that has not been emitted from the light-emitting surface 12 back to the light guide plate 1, thereby improving the utilization rate of light.

[0030] Preferably, the reflective film 3 is disposed on one side of the light incident surface 11 of the light guide plate 1. Specifically, the thickness of the reflective film 3 is 3 to 6 micrometers.

[0031] Preferably, the light guide plate 1 is a plate made of an isotropic material layer. Specifically, the light guide plate 1 is a rigid polymethyl methacrylate light guide plate 1.

[0032] The light source 2, light guide plate 1, and optical film assembly in the backlight structure are framed together by the frame 10.

[0033] This embodiment also proposes a display device, including the backlight structure as described above, wherein the backlight structure is disposed on the non-display side of the display device.

[0034] Preferably, the display device further includes an upper polarizer, which is disposed on the display side of the display device, and the transmission axis of the upper polarizer is parallel or perpendicular to the transmission axis of the brightness enhancement film. By setting a special microstructure 121 on the light-emitting surface 12 of the light guide plate 1, the viewing angle range is effectively expanded, making the display effect of the display device more uniform and consistent when viewed from different angles.

[0035] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A backlight structure, characterized in that, The light guide plate includes a light source, a light guide plate, and an optical film assembly. The light guide plate has a light-incident surface and a light-exit surface, and the light source is disposed on one side of the light-exit surface. The light-incident surface of the light guide plate is a planar structure, and the light-exit surface of the light guide plate has multiple microstructures. The microstructures are hemispherical protrusions with a radius ranging from 10 to 30 micrometers and a spacing of 40 to 150 micrometers between the microstructures.

2. The backlight structure according to claim 1, characterized in that, The distribution density of the hemispherical protrusions gradually increases from the center region to the edge region of the light guide plate, with a distribution density of 800 to 2000 per square centimeter in the center region and 2000 to 4000 per square centimeter in the edge region.

3. A backlight structure according to claim 1, characterized in that, The optical film assembly includes a diffusion film, a brightness enhancement film, and a reflective film, with the diffusion film and the brightness enhancement film sequentially disposed on one side of the light-emitting surface of the light guide plate.

4. A backlight structure according to claim 3, characterized in that, The surface of the reflective film has a metal reflective layer, which can reflect light that has not been emitted from the light-emitting surface back to the light guide plate, thereby improving the utilization rate of light.

5. A backlight structure according to claim 4, characterized in that, The reflective film is disposed on the light-incident surface of the light guide plate.

6. A backlight structure according to claim 4, characterized in that, The thickness of the reflective film is 3 to 6 micrometers.

7. A backlight structure according to claim 1, characterized in that, The light guide plate is a plate made of isotropic material layers.

8. A backlight structure according to claim 7, characterized in that, The light guide plate is a rigid polymethyl methacrylate light guide plate.

9. A display device, characterized in that, Includes the backlight structure as described in any one of claims 1 to 8, wherein the backlight structure is disposed on the non-display side of the display device.

10. A display device according to claim 9, characterized in that, The display device further includes an upper polarizer, which is disposed on the display side of the display device, and the transmission axis of the upper polarizer is parallel or perpendicular to the transmission axis of the brightness enhancement film.

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