Pixel Structure with Branch Electrodes for Liquid Crystal Alignment
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Solution Overview
Problem
Existing liquid crystal display panels with peripheral closed ITO electrode designs suffer from alignment disorder and non-uniform brightness due to edge liquid crystal being affected by electric fields, leading to the mura phenomenon.
Innovation Solution
A pixel structure featuring a main electrode and branch electrodes with alternating closed and open areas, where the branch electrodes form closed and open areas between adjacent electrodes, and the intersecting angles between branch and main electrodes are not equal to 90 degrees, improving liquid crystal alignment and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the ITO electrode adopts a peripheral closed design method, then the electrode structure is complete and continuous, but the liquid crystal at the edge is easily affected by the electric field causing alignment disorder and mura phenomenon
Solution Approach 1:
The patent divides the continuous peripheral closed ITO electrode into multiple independent branch electrodes that are not completely connected. This segmentation breaks the continuous electric field path at the edges, preventing the electric field from affecting the liquid crystal alignment at electrode boundaries, thereby eliminating the root cause of alignment disorder and mura phenomenon while maintaining electrode functionality
Solution Approach 2:
The patent applies different configurations to different regions of the electrode structure. The branch electrodes are arranged with specific intersecting angles (not equal to 90 degrees) and create alternating closed and open areas at different locations. This local variation in electrode configuration optimizes the electric field distribution in specific regions to prevent alignment disorder at critical edge positions
2Reliability
If the branch electrodes are arranged with closed areas, then the electric field distribution is improved, but the manufacturing complexity increases
Solution Approach 1:
The patent employs asymmetric arrangement of branch electrodes where the intersecting angles are deliberately designed to not equal 90 degrees. This asymmetric configuration creates the necessary closed and open areas to control electric field distribution and prevent alignment disorder, while the systematic asymmetry (consistent angle deviation) keeps the manufacturing process manageable through standardized non-orthogonal patterns
Data Source
AI summary
The invention discloses a pixel structure including: a main electrode, and a plurality of branch electrodes connected to the main electrode; wherein closed areas and open areas are formed among the plurality of the branch electrodes. The invention solves the problem that the liquid crystal at the edge position of the peripheral closed design scheme is easily affected by the electric field and the alignment disorder occurs by designing the branch electrode in the ITO electrode as the closed area and the open area, so that the display is uniform and the display effect is improved. Further, with respect to the design of the peripheral opening, the invention reduces the number of black streaks and increases the light transmittance due to the closed areas and the open areas of the interval distribution.