Curved Display Color Filter Substrate Spacer Shift Prevention
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Solution Overview
Problem
Conventional curved liquid crystal display panels experience light leakage and poor displaying due to main photo spacers twisting and shifting into pixel areas during the curving process, affecting the aperture ratio and overall displaying quality.
Innovation Solution
A color filter substrate with expanded sections in the edge area having a greater area than in the central area, and light-shielding strips with reduced width in the edge area, ensuring increased distance of main photo spacers from pixel zones and maintaining consistent aperture ratios across the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the CF substrate is curved by mechanical means, then the display can achieve a curved screen effect with surrounding image, but the main photo spacers in the edge area are twisted and shifted into the pixel open area causing light leakage
Solution Approach 1:
The patent applies local quality by creating expanded sections in the black matrix specifically in the edge area where photo spacers are located, while maintaining the original structure in the central area. This localized structural modification prevents photo spacer displacement into pixel areas during curving, eliminating light leakage without affecting the overall curved display function
Solution Approach 2:
The patent implements preliminary action by pre-forming the expanded sections in the black matrix structure before the curving process. These pre-formed expanded sections create a protective buffer that prevents photo spacers from shifting into pixel areas during subsequent mechanical curving, thereby preventing light leakage before it occurs
2Area of stationary object
If the main photo spacers are positioned closer to the pixel open area to reduce spacing, then the aperture ratio increases, but the photo spacers are more susceptible to twisting and shifting during curving
Solution Approach 1:
The patent applies local quality by creating expanded sections in the black matrix specifically in the edge area where photo spacers are located, while maintaining the original structure in the central area. This localized structural modification prevents photo spacer displacement into pixel areas during curving, eliminating light leakage without affecting the overall curved display function
Solution Approach 2:
The expanded sections in the black matrix act as an intermediary buffer between the photo spacers and the pixel open area. This intermediary structure absorbs the mechanical stress during curving, preventing the photo spacers from directly contacting or shifting into the pixel areas, thereby maintaining both aperture ratio and position stability
Data Source
AI summary
The present invention provides a CF substrate and a curved liquid crystal display panel including the CF substrate. A black matrix is provided on the CF substrate and includes a plurality of expanded sections respectively corresponding to a plurality of main photo spacers. The expanded sections that are located in an edge area of the CF substrate have an area that is greater than an area of the expanded sections that are located in a central area of the CF substrate in order to ensure the distance of the main photo spacers located in the edge area from the pixel open area is increased to effectively prevent the main photo spacers located in the edge area from being twisted with the panel and shifted into the pixel open area during a curving process of a curved liquid crystal display panel to induce undesired situations of light leakage and poor displaying of the display device. In addition, the light-shielding strips of the black matrix that are located in the edge area is arranged to have a width that is less than that of the light-shielding strips of the black matrix located in the central area in order to provide pixel zones of the edge area and the central area of the CF substrate with the same area, making the aperture ratios of the central area and the edge area of a curved liquid crystal display panel identical to thereby improving the displaying quality of the liquid crystal display panel.