Multi-Layer Pixel Electrode Structure for High Aperture Ratio
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Solution Overview
Problem
Conventional liquid crystal display devices face challenges in increasing the aperture ratio due to the limitations of pixel electrode placement, leading to reduced display area and increased risk of connections between adjacent pixel electrodes, which results in undesired bright spots and reduced storage capacitance.
Innovation Solution
The implementation of an array substrate with two pixel electrode layers in different planes, separated by an insulation layer, allowing for alternate arrangement of pixel electrodes and increasing the area of each pixel electrode without causing connections between adjacent pixels, thereby enhancing the aperture ratio and storage capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single pixel electrode layer is provided in the same plane, then the manufacturing process is simple, but the aperture ratio is reduced due to the need for large gaps between adjacent pixel electrodes
Solution Approach 1:
The patent transitions from a single-plane pixel electrode structure to a multi-layer structure where pixel electrodes are arranged in different planes (first pixel electrode layer and second pixel electrode layer). This dimensional change allows pixel electrodes to be vertically stacked rather than horizontally spaced, eliminating the need for large lateral gaps and thereby increasing the aperture ratio while maintaining manufacturing feasibility through sequential layer formation processes
2Area of moving object
If pixel electrodes of adjacent pixels are placed close to each other, then the aperture ratio is increased, but connections between adjacent pixel electrodes occur due to etching process limitations
Solution Approach 1:
By arranging pixel electrodes in different vertical planes (first and second pixel electrode layers separated by an insulation layer), the patent eliminates lateral proximity issues. The insulation layer provides reliable electrical isolation between layers, ensuring that pixel electrodes can be placed closer together horizontally without risk of connection, thus increasing aperture ratio while maintaining separation reliability
Solution Approach 2:
The patent introduces an insulation layer as an intermediary between the first and second pixel electrode layers. This insulation layer acts as a mediator that provides electrical isolation, allowing pixel electrodes to be positioned closer together without direct contact or unintended connections, thereby resolving the reliability issue while enabling higher aperture ratios
3Reliability
If large gaps are provided between pixel electrodes of adjacent pixels, then connections between pixel electrodes are prevented, but the display region and aperture ratio are reduced
Solution Approach 1:
The patent resolves this contradiction by moving the separation function from the horizontal plane to the vertical dimension. Through multi-layer stacking with an insulation layer, pixel electrodes achieve reliable separation without requiring large lateral gaps, thereby maximizing the display region and aperture ratio while maintaining electrical isolation between adjacent pixels
Data Source
AI summary
Embodiments of the invention provide an array substrate, a display panel and a display device. The array substrate comprises a pixel electrode layer. The pixel electrode layer comprises a first pixel electrode layer, a second pixel electrode layer and an insulation layer (104) provided between the first pixel electrode layer and the second pixel electrode layer, the insulation layer (104) insulates the first pixel electrode layer from the second pixel electrode layer, and a pixel electrode (1031) of the first pixel electrode layer and a pixel electrode (1032) of the second pixel electrode layer are alternately arranged.