Curved LCD Black Matrix Spacing for Light Leakage
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Solution Overview
Problem
Conventional LCD devices suffer from distance deviation, light leakage, and color mixture issues when curved, leading to reduced transmittance and aperture ratio, which are not effectively addressed by existing technologies.
Innovation Solution
A curved LCD device design featuring substrates with strategically positioned data lines, gate lines, pixel electrodes, black matrices, and color filters, where the spacing and width of these components vary between central and peripheral regions to maintain alignment and prevent misalignment-induced problems, along with a liquid crystal layer between the substrates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the LCD device is curved to eliminate distance deviation, then the viewing geometry is improved, but light leakage and color mixture occur due to misalignment
Solution Approach 1:
The patent applies local quality by making the black matrix spacing variable across different regions of the substrate. Specifically, the spacing between adjacent black matrixes in the peripheral region is smaller than in the central region, which compensates for the curvature-induced misalignment and prevents light leakage and color mixture while maintaining the curved shape
Solution Approach 2:
The patent changes the geometric parameter of black matrix spacing to resolve the alignment issue. By adjusting the spacing parameter spatially (smaller spacing in peripheral regions, larger spacing in central regions), the patent compensates for the curvature effect and maintains proper alignment across the entire display
2Reliability
If the black matrix spacing is reduced in peripheral regions to prevent light leakage, then alignment is improved, but aperture ratio decreases
Solution Approach 1:
The patent applies local quality by making the black matrix spacing variable across different regions of the substrate. Specifically, the spacing between adjacent black matrixes in the peripheral region is smaller than in the central region, which compensates for the curvature-induced misalignment and prevents light leakage and color mixture while maintaining the curved shape
Solution Approach 2:
The patent segments the substrate into central and peripheral regions with different black matrix spacing requirements. This segmentation allows each region to have optimized spacing for its specific functional needs, preventing light leakage in peripheral areas while maintaining adequate aperture ratio in the central area
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 design prevents light leakage and color mixture while maintaining transmittance and aperture ratio, enhancing the display's immersion and visual quality by ensuring equal distances from the viewing point to the center and sides, thus compensating for curvature-induced misalignment without decreasing aperture ratio.
Implementation Method 1
The LCD device uses optical anisotropy and polarization properties of liquid crystal molecules in the liquid crystal panel. Since incident light is refracted based on the orientation of the liquid crystal molecules due to the optical anisotropy of the liquid crystal molecules, images can be displayed by controlling light transmissivity.
Data Source
AI summary
A curved liquid crystal display device includes first and second substrates facing each other and including a central region and a peripheral region; a plurality of data lines disposed on the first substrate and being spaced apart from each other by the same distance; a plurality of gate lines disposed on the first substrate and crossing the plurality of data lines; a pixel electrode disposed on the first substrate; a common electrode on the first substrate or the second substrate; a plurality of black matrixes disposed on the second substrate, a distance between adjacent black matrixes in the central region being smaller than a distance between adjacent black matrixes in the peripheral region; and a liquid crystal layer disposed between the first and second substrates.