Array Substrate Pixel Electrode Boundary Configuration
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Solution Overview
Problem
Liquid crystal displays (LCDs) suffer from dark lines between main and sub-pixel regions due to voltage differences, leading to a low aperture ratio and poor visual effects.
Innovation Solution
An array substrate with a pixel electrode layer comprising distinct first and second pixel regions, where the pixel electrodes in one region are insulated from or disposed along the boundary of the other, along with trunk and branch electrodes, to eliminate pressure differences and optimize liquid crystal alignment, thereby reducing dark lines and increasing the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If main pixel region and sub-pixel region are arranged vertically with different voltages, then pixel electrode layer can be formed, but dark lines appear between and within pixel regions
Solution Approach 1:
The pixel electrode layer is segmented into multiple independent pixel electrodes within each pixel region, rather than using a single continuous electrode. This segmentation allows different voltage zones to be created without direct electrical connection, eliminating the dark line problem caused by voltage differences while maintaining manufacturability.
Solution Approach 2:
An insulating layer is introduced as an intermediary between adjacent pixel electrodes with different voltages. This insulating layer prevents direct electrical connection and voltage equalization, allowing different voltage zones to coexist without causing dark lines, thus resolving the contradiction between ease of manufacture and visual quality.
2Ease of manufacture
If pixel regions are arranged with distinct voltage zones, then pixel electrode layer can be formed, but aperture ratio is reduced
Solution Approach 1:
Instead of arranging pixel regions in a simple vertical sequence that consumes area, the patent uses a grid-like arrangement with trunk electrodes and branch electrodes extending in multiple directions. This dimensional approach allows voltage zones to be defined by electrode extensions rather than large spacing, maintaining high aperture ratio while enabling distinct voltage zones for manufacturing purposes.
Data Source
AI summary
An array substrate and a display panel are provided. The array substrate includes a substrate, a thin film transistor layer disposed on the substrate, and a pixel electrode layer disposed on the thin film transistor layer. The pixel electrode layer includes a plurality of pixel regions, and the pixel regions include a first pixel region and a second pixel region. A pixel electrode in the second pixel region is disposed along an outer boundary of the first pixel region, or a pixel electrode in the first pixel region is disposed along an outer boundary of the second pixel region.