Display Top Chassis Surface Roughness for Light Leakage Control
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Solution Overview
Problem
Display apparatuses face challenges in minimizing light leakage between the display panel and the top chassis, which affects display quality by reducing the efficiency of light utilization and image clarity.
Innovation Solution
The design incorporates a top chassis with a first cover portion that has a surface with varying roughness, featuring protruding and recessed portions, which are alternately arranged to irregularly reflect or refract light, thereby reducing light leakage and enhancing display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat surface is used on the top chassis, then manufacturing is simple, but light leakage occurs between the display panel and top chassis
Solution Approach 1:
The patent applies different surface roughness values to different regions of the top chassis. The first region (overlapping the display panel) has a first surface roughness value, while the second region (around the first region) has a second surface roughness value. This local differentiation allows the surface to control light reflection properties in specific areas, preventing light leakage from the display panel while maintaining manufacturing feasibility through region-specific treatment.
2Use of energy by moving object
If the top chassis is positioned close to the display panel, then light utilization efficiency improves, but light leakage increases
Solution Approach 1:
The patent changes the surface roughness parameter of the top chassis to resolve the contradiction. By setting different roughness values for different regions, the surface modifies its optical properties to control light reflection. This allows the top chassis to be positioned close to the display panel for high light utilization while the varied roughness pattern prevents light leakage by directing light appropriately across different regions.
3Ease of manufacture
If a uniform surface roughness is used across the top chassis, then manufacturing is simpler, but light control precision is reduced
Solution Approach 1:
The patent implements local quality by assigning different surface roughness values to different spatial regions of the top chassis. The first region overlapping the display panel has a first surface roughness value optimized for light control, while the second region has a second surface roughness value. This regional differentiation provides precise light control where needed while maintaining manufacturing feasibility through localized treatment rather than uniform complex processing.
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 configuration effectively minimizes light leakage between the display panel and the top chassis, improving the overall display quality by ensuring that more light is directed into the display panel or backlight unit, resulting in better image clarity and reduced losses.
Implementation Method 1
irregularly reflect or refract light, thereby reducing light leakage
Implementation Method 2
irregularly reflect or refract light, thereby reducing light leakage
Data Source
AI summary
A display apparatus includes a display panel and a top chassis. The top chassis includes a first cover portion disposed above a top surface of the display panel and a second cover portion which is bent and extended from the first cover portion. The first cover portion defines a first region thereof overlapping the top surface of the display panel, a second region thereof disposed around the first region and a surface thereof which is disposed in the first and second regions and faces the top surface of the display panel. A surface roughness of the surface in the first region is greater than that of the surface in the second region.