Pixel Electrode Corner Extension for Display Panel Mura Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing pixel structures in LCD devices suffer from reduced light transmittance and an increased risk of image mura due to corners of slits being located in open areas, affecting the display quality.
Innovation Solution
The pixel structure design includes a pixel electrode that is electrically connected to a thin film transistor in a preceding adjacent row, with the corner of the pixel electrode extending towards the transistor, allowing the corner to be completely covered by the black matrix during the adherence of the color filter substrate, thereby reducing the number of corners in the open area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the pixel electrode is designed with slits having corners in the open area, then the pixel structure is simpler to manufacture, but the light transmittance is reduced and the risk of image mura increases
Solution Approach 1:
The patent extends the corner of the pixel electrode along the row direction (horizontal dimension) to overlap with the thin film transistor in the preceding row, rather than having it extend vertically into the open area. This dimensional shift moves the corner from the problematic open area location to a position covered by the black matrix, resolving the light transmittance issue while maintaining manufacturing simplicity
Solution Approach 2:
The pixel electrode corner is pre-positioned to extend toward the thin film transistor of the preceding row during the electrode formation process. This preliminary positioning ensures that when the color filter substrate is adhered, the corner will be covered by the black matrix, preventing the formation of harmful electric fields in the open area before assembly occurs
2Device complexity
If the pixel electrode corner extends into the open area, then the pixel electrode structure is more straightforward, but the risk of trace mura in the displayed image increases
Solution Approach 1:
The patent converts the potentially harmful corner extension into a beneficial overlap with the thin film transistor. By extending the corner horizontally to overlap with the preceding row's transistor, the corner is covered by the black matrix, transforming what would be a harmful open-area corner into a controlled structure that eliminates mura risk while maintaining structural simplicity
3Shape
If the corner of the pixel electrode is positioned in the open area, then the slit design is simpler, but the electric field control is compromised and light transmittance decreases
Solution Approach 1:
The corner extension is shifted from the vertical dimension (into the open area between pixels) to the horizontal dimension (along the row direction to overlap with the preceding row's transistor). This dimensional change repositions the corner under the black matrix coverage, eliminating harmful electric field distortion while preserving the simple slit configuration
Data Source
AI summary
The disclosure provides a pixel structure, a manufacturing method of a pixel structure, an array substrate, a display panel, and a display device. The pixel structure includes a plurality of data lines and a plurality of scan lines, and a plurality of pixel units formed by intersecting the plurality of data lines with the plurality of scan lines. A pixel unit corresponds to one of the plurality of data lines and one of the plurality of scan lines. The pixel unit includes a pixel electrode and a TFT. The pixel electrode of the pixel unit in a row is electrically connected to a TFT of a pixel unit in a preceding adjacent row of the pixel electrode of the pixel unit.