Backlight Reflective Layer Layout for Uniform Edge Brightness
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Solution Overview
Problem
Direct-type backlight modules suffer from poor brightness uniformity, with central regions being significantly brighter than peripheries, affecting display quality.
Innovation Solution
A reflective layer on the backlight module is designed with regions of varying reflectivity, where the peripheral regions have higher reflectivity than central regions, ensuring uniform brightness across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a direct-type backlight module is used, then the structure is simple, but the brightness uniformity is poor with central regions being significantly brighter than peripheries
Solution Approach 1:
The reflective layer is designed with spatially varying reflectivity: the first region (central area) has lower reflectivity to reduce excessive brightness, while the second region (peripheral area) has higher reflectivity to enhance brightness. This local differentiation of optical properties directly addresses the brightness uniformity issue while maintaining the simple direct-type structure.
2Ease of manufacture
If the reflective layer has uniform reflectivity, then the manufacturing is simple, but the brightness distribution is non-uniform
Solution Approach 1:
The reflective layer incorporates regions with different reflectivity values - the first region with lower reflectivity and the second region with higher reflectivity. This local variation in optical properties achieves uniform brightness distribution across the display surface while remaining manufacturable through standard coating techniques applied to pre-defined regional zones.
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 achieves a uniform brightness distribution, enhancing display quality by increasing brightness in peripheral regions and maintaining it at a similar level to central regions.
Implementation Method 1
The reflective layer covers the substrate and faces the reflective side. The reflective side is divided by the reflective layer into a first region and a second region surrounding the first region, and the reflectivity of the second region is greater than that of the first region.
Data Source
AI summary
A backlight module, including a reflective plate and a plurality of light-emitting units. The reflective plate is provided with a reflective side. The light-emitting units are provided on the reflective side. The reflective plate includes a substrate and a reflective layer. The reflective layer covers the substrate. The reflective side is divided by the reflective layer into a first region and a second region surrounding the first region, and the reflectivity of the second region is greater than that of the first region.