Curved Display Panel With Black Matrix Compensation Structures
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Solution Overview
Problem
Curved display panels face issues with color crossover and light leakage due to misalignment and phase difference in the liquid crystal layer caused by bending, which degrade image quality.
Innovation Solution
A display panel design with a first substrate and a second substrate having a curved surface structure, incorporating a black matrix layer with compensation structures that overlap orthographically with signal lines to maintain alignment and reduce misalignment, thereby minimizing color crossover and light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a curved display panel structure is adopted to achieve better viewing angle characteristics and wide field of view, then the viewing angle and field of view are improved, but color crossover and light leakage occur due to misalignment and phase difference in the liquid crystal layer
Solution Approach 1:
The patent applies preliminary action by pre-compensating for the misalignment that occurs during bending. The black matrix layer is designed with a width that is wider than the signal line width, and compensation structures are added at both ends of the signal lines in the bending direction. This preliminary design ensures that even after the panel is bent into a curved shape, the black matrix and compensation structures will cover the signal lines, preventing color crossover and light leakage before the actual viewing occurs.
Solution Approach 2:
The patent implements preliminary anti-action by introducing compensation structures that counteract the harmful effects of bending-induced misalignment. The compensation structures are positioned at the ends of signal lines where misalignment is most likely to occur during bending. These structures create an opposing effect that prevents the liquid crystal layer from developing phase differences that would cause color crossover, thereby neutralizing the harmful effects before they manifest.
2Object-affected harmful factors
If the black matrix layer width is increased to cover signal lines after bending, then color crossover is prevented, but the manufacturing precision requirements increase due to the need for precise alignment of compensation structures
Solution Approach 1:
The patent reduces manufacturing precision requirements by performing the alignment function during the fabrication process rather than requiring post-bending adjustment. The compensation structures are formed simultaneously with the black matrix layer using standard photolithography and deposition processes. The design rules specify that the compensation structure width should be equal to or greater than the signal line width, and the black matrix layer width should be sufficiently large to cover the signal lines after bending, providing a built-in alignment tolerance that eliminates the need for high-precision post-processing alignment.
Data Source
AI summary
Disclosed is a display panel including a first substrate which includes a first base substrate and a black matrix layer disposed on the first base substrate, and a second substrate which includes a second base substrate and multiple first signal lines disposed on the second base substrate. The black matrix layer includes multiple first body structures corresponding to the multiple first signal lines and a first compensation structure is provided on one side of at least one first body structure. In a curved surface where the first substrate is located, the first body structure and the first compensation structure extend along the second direction and are arranged along the fourth direction. An orthographic projection of any one of the first signal lines on the second substrate is located within a range of orthographic projections of a corresponding first body structure and a first compensation structure on the second substrate.