Pixel Electrode Corner Extension for Black Matrix Coverage
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Solution Overview
Problem
The limited length of corner areas in pixel electrodes of Liquid Crystal Display devices leads to reduced light transmittance due to incomplete coverage by the black matrix in the color filter substrate, causing uneven electric fields across the slits.
Innovation Solution
The pixel electrode is electrically connected to a TFT in the same row and adjacent to it, with at least one corner area extending towards the TFT, allowing the corner area to be covered by the black matrix, thereby increasing its length and improving light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the corner area length is increased to improve light transmittance, then the pixel electrode may break due to excessive length
Solution Approach 1:
The pixel electrode is divided into multiple independent slits, with each slit having its own corner areas. This segmentation allows each corner area to be independently controlled in length, enabling the corner areas to extend toward adjacent TFTs for better black matrix coverage and improved light transmittance, while the main body of the pixel electrode remains intact and structurally sound.
2Illumination intensity
If the corner area length is extended toward adjacent TFTs, then the black matrix can cover the end of the corner area, but this requires changing the electrical connection structure
Solution Approach 1:
The pixel electrode is designed to be electrically connected to TFTs in adjacent pixel units, serving multiple functions: it maintains the electrical connectivity required for pixel operation while simultaneously extending its corner areas toward those adjacent TFTs. This multi-functional design enables the corner areas to be covered by the black matrix for improved light transmittance without requiring separate structural modifications.
Data Source
AI summary
A pixel structure and manufacturing method therefor, an array structure, a display panel and a display device. And the pixel structure includes data lines; scan lines; pixel units formed by intersecting the data lines with the scan lines, where each pixel unit corresponds to one data line and one scan line; a TFT and a pixel electrode disposed in each of pixel units, where the pixel electrode includes slits, at least one of which includes at least one corner area at an end thereof; where the pixel electrode in a row is electrically connected to a TFT in a pixel unit, the pixel unit is disposed in the same row as and adjacently at one side of the pixel electrode, and at least one corner area of the pixel electrode extends toward the TFT electrically connected to the pixel electrode.