LCD Panel Quarter Wave Retarder Films Color Shift
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Solution Overview
Problem
Current vertical alignment (VA) type liquid crystal display (LCD) panels suffer from color shift issues, which degrade display quality and are accompanied by reduced transmittance, necessitating an improvement in pixel structure without compromising performance.
Innovation Solution
The implementation of a pixel electrode structure with specific angular configurations and the use of quarter wave pattern retarder films, where main and sub-pixel regions have distinct branch angles and polarizer orientations, along with quarter wave and zero wave retarder rows, to adjust polarized light directions and enhance transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the pixel structure of the LCD panel is varied to improve color shift, then the color shift problem is improved, but the transmittance of the LCD panel is reduced
Solution Approach 1:
The pixel electrode is segmented into multiple regions (first pixel electrode region, second pixel electrode region, third pixel electrode region) with different branch portion configurations. Each region has trunk portions and branch portions forming specific angular patterns (45 degrees, 135 degrees, etc.), allowing different light control characteristics in different areas to simultaneously address color shift while maintaining transmittance
Solution Approach 2:
Different regions of the pixel electrode are assigned different local structures: the first pixel electrode region has branch portions at 45 degrees to trunk portions, the second region has branch portions at 135 degrees, and the third region has a different pattern. This local differentiation allows each region to optimize for specific optical performance, resolving the color shift issue without uniformly reducing transmittance across the entire panel
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 mitigates the color shift problem and enhances the transmittance of VA type LCD panels by optimizing the polarized light direction and angles, thereby improving display quality.
Implementation Method 1
two quarter wave pattern retarder films disposed between the first substrate and the first polarizer, and between the second substrate and the second polarizer, respectively, wherein the quarter wave pattern retarder films comprise a plurality of quarter wave retarder rows and a plurality of zero wave retarder rows
Implementation Method 2
a first polarizer disposed at an outer side of the first substrate; a second polarizer disposed at an outer side of the second substrate
Data Source
AI summary
The present invention provides a liquid crystal display (LCD) panel and a display apparatus using the same. The LCD panel comprises a first substrate, a second substrate, a liquid crystal layer and quarter wave (λ/4) pattern retarder films. The liquid crystal layer is formed between the first substrate and the second substrate. The second substrate comprises a second electrode, wherein the second electrode comprises main pixel regions and sub-pixel regions. The λ/4 pattern retarder films are disposed between the first substrate and a first polarizer, and between the second substrate and a second polarizer, respectively. The present invention can improve the color shift problem and the transmittance of the LCD panel.