Light Guide Plate Assembly Curved Transmission for Uniform Brightness
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Solution Overview
Problem
Existing LCD display panels face issues with uneven brightness due to the backlight module, leading to suboptimal display quality and increased costs from the need for additional diffusion plates.
Innovation Solution
A light guide plate assembly with a reflection portion and a transmission portion, featuring a converging and diverging section, is integrated into the backlight module to enhance light distribution, eliminating the need for diffusion plates by directing large-angle light towards the edges and small-angle light away from the center, thereby achieving uniform brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional backlight module is used, then the display panel can be illuminated, but the brightness is uneven across the display panel
Solution Approach 1:
The light guide plate is divided into multiple functional regions: a reflection portion with an aperture for receiving light from light-emitting elements, a transmission portion with a first surface and second surface for light distribution, and a diffusion portion. This segmentation allows each region to perform its specific function optimally, with the reflection portion capturing light, the transmission portion directing it uniformly, and the diffusion portion scattering it to achieve even brightness across the display panel.
Solution Approach 2:
The first surface of the transmission portion is designed with a curved configuration rather than a flat surface. This curvature enables the light guide plate to redirect light rays at different angles more effectively, converting concentrated light from the light-emitting elements into a more diffuse, uniform distribution pattern that eliminates brightness unevenness while maintaining a relatively simple overall structure.
2Illumination intensity
If additional diffusion plates are added to fix brightness unevenness, then brightness uniformity improves, but device complexity and cost increase
Solution Approach 1:
The patent combines the functions of light reflection, transmission, and diffusion into a single integrated light guide plate assembly. The reflection portion, transmission portion, and diffusion portion are merged into one component structure, eliminating the need for separate diffusion plates that would otherwise be required to achieve uniform brightness. This integration reduces the total number of components while maintaining the brightness uniformity effect.
Solution Approach 2:
The light guide plate assembly performs multiple functions simultaneously: the reflection portion captures and redirects light from light-emitting elements, the transmission portion distributes light across the display panel, and the diffusion portion scatters light to ensure uniform brightness. This multi-functionality is achieved within a single integrated structure, replacing what would traditionally require multiple separate components including additional diffusion plates.
3Illumination intensity
If a complex light guide plate structure is used to achieve uniform brightness, then brightness uniformity improves, but manufacturing cost increases
Solution Approach 1:
The light guide plate is divided into multiple functional regions: a reflection portion with an aperture for receiving light from light-emitting elements, a transmission portion with a first surface and second surface for light distribution, and a diffusion portion. This segmentation allows each region to perform its specific function optimally, with the reflection portion capturing light, the transmission portion directing it uniformly, and the diffusion portion scattering it to achieve even brightness across the display panel.
Solution Approach 2:
The first surface of the transmission portion is designed with a curved configuration rather than a flat surface. This curvature enables the light guide plate to redirect light rays at different angles more effectively, converting concentrated light from the light-emitting elements into a more diffuse, uniform distribution pattern that eliminates brightness unevenness while maintaining a relatively simple overall structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution improves light intensity uniformity across the display panel, reduces the thickness and cost of the light guide plate assembly, and enhances the display effect by preventing light crosstalk and mesh patterns, resulting in a more efficient and cost-effective backlight module.
Implementation Method 1
a light guide plate assembly with a reflection portion and a transmission portion, featuring a converging and diverging section, is integrated into the backlight module to enhance light distribution
Data Source
AI summary
Provided are a light guide plate assembly, a backlight module, and a display device, which relate to the field of display technologies, and improve uniformity of the light intensity of light emitted from different areas in the light guide plate assembly. The light guide plate assembly includes a reflection portion having an aperture; and a transmission portion. At least part of the transmission portion is located in the aperture. The transmission portion includes a converging portion and a diverging portion. A curvature of a surface of the converging portion adjacent to a light-incoming side of the light guide plate assembly is greater than or equal to 0, and a curvature of a surface of the diverging portion adjacent to the light-incoming side of the light guide plate assembly is smaller than or equal to 0.