Liquid Crystal Panel Spacer Light-Shielding Position Shift
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Solution Overview
Problem
High-resolution liquid crystal panels suffer from reduced visibility due to the 'screen door effect' caused by spacers, which significantly decrease aperture ratios and contrast ratios, particularly in head-mounted displays where pixel density is high.
Innovation Solution
The liquid crystal panel design includes shifting the column-direction position of light-shielding sections opposite to the spacer arrangement, ensuring that the aperture ratios of pixels shielded by the first light-shielding section meet or exceed 85% of adjacent pixels, thereby minimizing the visibility of spacers and maintaining high display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light-shielding sections are arranged to overlap with spacers to prevent light leakage, then contrast ratio is improved, but aperture ratio decreases and visibility deteriorates
Solution Approach 1:
The patent applies different light-shielding strategies to different pixel regions. Pixels overlapping with spacers (first pixels) have light-shielding sections with first aperture ratios, while adjacent pixels (second pixels) have light-shielding sections with second aperture ratios. This local differentiation allows optimal light shielding at spacer locations while maintaining higher aperture ratios in adjacent areas, resolving the contradiction between contrast ratio and overall aperture ratio.
Solution Approach 2:
The patent changes the aperture ratio parameter of light-shielding sections based on pixel position. By setting the first aperture ratio of light-shielding sections in pixels overlapping with spacers to be different from the second aperture ratio in adjacent pixels, the patent optimizes both light leakage prevention and overall light transmission, thereby improving visibility while maintaining contrast ratio.
2Reliability
If light-shielding sections are made large to suppress light leakage at spacer positions, then contrast ratio improves, but aperture ratio of surrounding pixels decreases significantly
Solution Approach 1:
The patent implements local quality by assigning different aperture ratios to light-shielding sections based on their position relative to spacers. The first light-shielding sections overlapping with spacers have optimized aperture ratios for light leakage prevention, while the second light-shielding sections in adjacent pixels have larger aperture ratios to maintain productivity and overall light transmission.
Solution Approach 2:
The patent segments the light-shielding sections into different types based on pixel position. By dividing light-shielding sections into those overlapping with spacers and those in adjacent pixels, the patent can optimize each segment's aperture ratio independently, preventing the need to make all light-shielding sections uniformly large.
3Reliability
If aperture ratio of pixels overlapping with spacers is reduced to compensate for light leakage, then contrast ratio improves, but visibility and display quality deteriorate
Solution Approach 1:
The patent changes the aperture ratio parameter differentially across pixel positions. By setting the first aperture ratio in pixels overlapping with spacers to be different from the second aperture ratio in adjacent pixels, the patent maintains higher overall illumination intensity and visibility while still achieving sufficient contrast ratio through localized light shielding optimization.
Data Source
AI summary
Provided are a liquid crystal panel which has good visibility and in which a decrease in the display quality is sufficiently suppressed, and a head mounted display and a liquid crystal display device using the same. The liquid crystal panel includes a liquid crystal layer, a spacer, and a light-shielding section between a first substrate a second substrate facing the first substrate. The light-shielding section includes column-direction light-shielding sections arranged in a column direction and shielding parts between the pixels aligned in a row direction from light, and row-direction light-shielding sections arranged in the row direction and shielding parts between the pixels aligned in the column direction from light. The row-direction light-shielding sections include one that includes a first light-shielding section including an arrangement region of the spacer and a second light-shielding section adjacent to the first light-shielding section in the column direction.