Reflective Sheet Partition Structures for Uniform Light Diffusion
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Solution Overview
Problem
The issue of a dark belt or bright edge appearing in liquid crystal displays due to inadequate light reflection at the corners of reflective sheets in backlight modules, which affects the display effect.
Innovation Solution
The implementation of partition structures on the side surface of the reflective sheet, featuring dotted lines arranged horizontally or vertically in parallel, that bend the sheet at a preset slope, ensuring uniform light irradiation and diffusion, thereby preventing less light reflection at corner regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the reflective sheet uses conventional rectangular folding at edges and corners, then the manufacturing process is simple, but the corners have lower slope/curvature causing reduced light reflection and dark belt or bright edge effects
Solution Approach 1:
The reflective sheet is divided into multiple regions with different folding patterns: edge regions use conventional folding while corner regions use special folding structures. This segmentation allows each region to be optimized independently - edges maintain simple manufacturing while corners achieve proper light reflection angles to eliminate dark belts and bright edges.
Solution Approach 2:
Different folding structures are applied to different locations of the reflective sheet. Corner regions use special folding patterns with specific slope angles (45-60 degrees) to match edge regions, while edge regions use conventional folding. This local quality approach ensures that each area has the appropriate optical properties for its function, achieving uniform light reflection across the entire sheet.
2Illumination intensity
If the corner slope/curvature is increased to match edge regions for uniform light reflection, then the display effect improves, but the manufacturing complexity increases
Solution Approach 1:
The reflective sheet is divided into multiple regions with different folding patterns: edge regions use conventional folding while corner regions use special folding structures. This segmentation allows each region to be optimized independently - edges maintain simple manufacturing while corners achieve proper light reflection angles to eliminate dark belts and bright edges.
Solution Approach 2:
Different folding structures are applied to different locations of the reflective sheet. Corner regions use special folding patterns with specific slope angles (45-60 degrees) to match edge regions, while edge regions use conventional folding. This local quality approach ensures that each area has the appropriate optical properties for its function, achieving uniform light reflection across the entire sheet.
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
This solution effectively addresses the issue of dark belts and bright edges by ensuring uniform light distribution across the reflective sheet, enhancing the display effect by improving light reflection and diffusion.
Implementation Method 1
the partition structures bend the side surface of the reflective sheet at a preset slope... ensuring uniform light irradiation and diffusion
Implementation Method 2
the reflective sheet is used in the backlight module... the corners reflect less light... improving light reflection and diffusion
Data Source
AI summary
A reflective sheet and a manufacturing method thereof, a backlight module, and a display device are provided, the reflective sheet includes: a partition structure provided on a side surface of the reflective sheet, where the reflective sheet includes partition structures arranged on a side surface of the reflective sheet, the partition structures bend the side surface of the reflective sheet at a preset slope, and the partition structures include a plurality of dotted lines arranged horizontally or vertically in parallel.