Curved Display Panel Black Matrix Width Adjustment
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Solution Overview
Problem
Existing curved liquid crystal display devices suffer from reduced aperture ratio and brightness unevenness due to differences in the horizontal width of the black matrix in edge and middle sections, leading to suboptimal image quality.
Innovation Solution
A curved display panel design where the position relation of second pixel sections with respect to first pixel sections is adjusted by a correction displacement amount based on an assumed displacement amount corresponding to their position on the display surface, ensuring proper overlap and alignment during the curving process, thereby maintaining a consistent aperture ratio and preventing brightness unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the horizontal width of the black matrix is made equal in edge and middle sections of the CF substrate, then the manufacturing process is simplified, but the aperture ratio is greatly reduced in the edge sections
Solution Approach 1:
The patent applies local quality by making the black matrix width variable rather than uniform. Specifically, the black matrix width is made larger in the middle section of the CF substrate and smaller in the edge sections. This localized differentiation allows each region to have optimal black matrix width: sufficient width in the middle for light blocking, and reduced width at edges to maximize aperture ratio and prevent brightness unevenness.
2Area of moving object
If the horizontal width of the black matrix differs between edge and middle sections to maintain aperture ratio, then brightness unevenness occurs across different sections
Solution Approach 1:
The patent applies parameter changes by systematically varying the black matrix width parameter across different spatial locations on the CF substrate. The width is changed from a constant value to a position-dependent value, creating a gradient distribution where width transitions smoothly from edge sections to middle section. This parameter variation simultaneously optimizes aperture ratio while maintaining brightness uniformity across the display surface.
3Ease of manufacture
If pixel sections are aligned in the flat state, then manufacturing is easier, but displacement during curving causes misalignment and reduces image quality
Solution Approach 1:
The patent applies preliminary action by pre-positioning the pixel sections with anticipated displacement in mind. During the flat state assembly, pixel sections are deliberately offset by a calculated amount that compensates for the expected displacement during curving. This preliminary positioning ensures that after the substrate is curved, the pixel sections automatically align correctly without requiring post-curving adjustment, thus maintaining both manufacturing ease and alignment precision.
Data Source
AI summary
A curved display panel including a display surface curved around one curving axis includes a first substrate, a second substrate disposed opposite the first substrate while having a space therebetween, first pixel sections included in the first substrate and arranged within a surface area of the display surface, and second pixel sections included in the second substrate and arranged within the surface area of the display surface and overlapping the first pixel sections, respectively, in a curved state of the display surface. For at least some of the second pixel sections that are to be displaced by curving, position relation with respect to the first pixel sections in the flat state of the display surface is changed from that in the curved state of the display surface by a correction displacement amount based on an assumed displacement amount corresponding to a position within the surface area of the display surface.