LCD Array Substrate Eliminating Through Holes for Higher Transmittance
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Solution Overview
Problem
The existing liquid crystal display (LCD) panels suffer from low transmittance due to the pixel aperture being negatively affected by through holes, which restricts the display quality and view angles.
Innovation Solution
A method for manufacturing an array substrate where a patterned gate layer and common electrodes are arranged simultaneously, followed by a semiconductor layer, source/drain electrode pattern layer, and pixel electrodes/data lines, all covered with a passivation layer, allowing top electrodes to be connected to the common electrode without through holes, thereby eliminating the need for through holes and enhancing transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If through holes are arranged to connect pixel electrodes to source/drain electrodes, then electrical connection is achieved, but pixel aperture ratio and transmittance are reduced
Solution Approach 1:
The patent transitions from vertical connection (through holes penetrating the pixel electrode) to lateral connection (extending source/drain electrodes along the gate length direction). This dimensional change allows electrical connection without compromising the pixel aperture area, as the connection is made in the plane of the electrode rather than through it.
Solution Approach 2:
The source/drain electrode is segmented into multiple portions that extend along the gate length direction, with each portion making contact with the semiconductor layer at different positions. This segmentation enables distributed electrical connection without requiring through holes, thereby maintaining pixel aperture integrity.
2Ease of manufacture
If through holes are arranged in pixel electrodes, then connection between layers is enabled, but manufacturing complexity increases
Solution Approach 1:
The patent extracts the connection function from the pixel electrode structure by using separate source/drain electrode extensions. This removes the need for through holes in the pixel electrode, simplifying the device structure while maintaining the essential layer-to-layer electrical connection capability.
3Area of stationary object
If pixel size is reduced to increase aperture ratio, then display resolution improves, but through hole impact becomes more significant
Solution Approach 1:
By changing the connection approach from vertical (through holes) to lateral (electrode extensions along gate length), the patent eliminates the alignment precision requirements for through holes. This allows pixel size to be reduced for higher resolution without the compounding alignment difficulties that would arise from smaller through holes.
Data Source
AI summary
The present invention provides a liquid crystal display panel, array substrate and method for manufacturing the same. The method for manufacturing the array substrate comprises the steps of: arranging simultaneously a patterned gate layer and common electrodes on a substrate; covering a gate insulating layer on the patterned gate layer, the common electrode and the substrate; arranging a semiconductor layer on the gate insulating layer; arranging a source/drain electrode pattern layer on the semiconductor layer, and arranging pixel electrodes and data lines on the gate insulating layer simultaneously; and covering a passivation layer on the source/drain electrode pattern layer, the semiconductor layer, the pixel electrodes and the data lines. The pixel aperture ratio and transmittance can be increased, and achieving a better displaying effect by the present invention.