导光板、背光模组及显示装置
By setting light guide films and microstructures on the light guide plate, combined with grooves and light blocking parts, the display ghosting problem of LCD liquid crystal displays is solved, achieving more efficient light utilization and improved display effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BOE TECHNOLOGY GROUP CO LTD
- Filing Date
- 2025-07-16
- Publication Date
- 2026-07-17
AI Technical Summary
LCD monitors have a relatively long response time for liquid crystal molecules, which causes brightness changes to lag behind changes in the driving signal, resulting in display ghosting and affecting display clarity.
The light guide plate design includes a main light guide plate and a light guide film. The light guide film has microstructures, combined with grooves and light blocking parts. Through an integrated molding process, the uniformity of light and the direction of light propagation are improved, and the halo diffusion is reduced.
It improves light utilization efficiency, reduces halo effects, enhances display quality and brightness uniformity, simplifies manufacturing processes, and reduces production costs.
Smart Images
Figure CN224518990U_ABST
Abstract
Claims
1. A light guide plate, characterized by, include: Light guide mainboard, including the top surface; Light guide film; It includes a light-inlet surface and a light-outlet surface, the light-inlet surface of the light guide film is attached to the top surface of the light guide main board, and the light-outlet surface of the light guide film has a microstructure that protrudes relative to the top surface of the light guide main board.
2. The light guide plate according to claim 1, wherein The light guide main board also includes a bottom surface opposite to the top surface. The light guide main board has a plurality of grooves arranged at intervals. The grooves extend from the bottom surface of the light guide main board to the top surface by a certain thickness. The light guide plate further includes a filling layer, which comprises a plurality of light-blocking portions, each of which fills one of the grooves; wherein... The light-blocking part is arranged correspondingly to the microstructure.
3. The light guide plate according to claim 2, wherein The microstructure includes a plurality of spaced strip units, the direction of which the spaced strip units are arranged in the same direction as the arrangement of the grooves.
4. The light guide plate according to claim 3, wherein The number of grooves is the same as the number of strip units, and the grooves correspond one-to-one with the strip units.
5. The light guide plate according to claim 3, wherein The orthographic projection of the light-blocking part on the top surface of the light guide main board falls entirely within the orthographic projection of the microstructure on the top surface of the light guide main board.
6. The light guide plate according to claim 5, wherein The width of the orthographic projection of the strip unit on the light guide plate ranges from 10μm to 40μm.
7. The light guide plate according to claim 3, wherein The height of the strip-shaped unit is 0.5 mm to 1 mm in the direction from the light-inlet surface of the light guide film to the light-outlet surface.
8. The light guide plate according to claim 3, wherein The cross-sectional area of the strip-shaped unit gradually increases from the end opposite to the light guide main board to the end closer to the light guide main board.
9. The light guide plate according to claim 2, wherein The cross-section of the light-blocking part can be any one of a rectangle, triangle, trapezoid, inverted trapezoid, or arc.
10. The light guide plate according to claim 9, wherein The depth of the trench is 50%-90% of the thickness of the light guide mainboard.
11. The light guide plate according to claim 1, wherein The microstructure and the light guide film are integrally formed.
12. A backlight module, characterized in that, The backlight module includes a back plate, a reflective sheet, an optical film group, multiple light sources, and a light guide plate as described in any one of claims 1 to 11; The reflective sheet is located on the back plate, the light guide plate is located on the side of the reflective sheet away from the back plate, the optical film group is located on the side of the light guide plate away from the reflective sheet, and the light source is located on one side of the light guide plate.
13. The backlight module of claim 12, wherein, A plurality of strip-shaped units are arranged at intervals along a first direction, the strip-shaped units extend along a second direction, the light guide plate has two opposite sides in the second direction, a plurality of light sources are arranged on at least one of the two sides, the distance between two adjacent light sources on the same side is D, the overall thickness of the light guide plate is A, the thickness of the light guide plate is B, the thickness of the light guide film is AB, the cross section of the strip-shaped unit perpendicular to the second direction X is triangular, and the vertex angle of the triangle is C = arctan((AB)*2) / D.
14. A display device, characterized in that, It includes the backlight module and display panel as described in claim 12, wherein the display panel is located on the light-emitting side of the backlight module.