Array Substrate Pixel Electrode Short Circuit Detection and Repair
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Solution Overview
Problem
Current array substrate manufacturing technologies fail to detect and address the issue of 'remain of pixel electrodes' effectively, leading to short circuits and defective display panels, which reduces product quality and qualification rates.
Innovation Solution
A method involving the formation of first lead lines, pixel electrodes, and connecting lines on a substrate, with detection and severing of short circuits between equivalent lead lines and first lead lines to prevent electrical connections, using a process that includes forming a common electrode with openings and vias to facilitate the removal of connecting lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If connecting lines are used to electrically couple pixel electrodes to form equivalent lead lines, then the aperture ratio of pixels is improved, but the risk of short circuits between equivalent lead lines and first lead lines increases
Solution Approach 1:
The patent applies preliminary action by forming opening patterns in the common electrode before completing the connection between pixel electrodes and data lines. This allows the equivalent lead line to be established in advance, enabling the aperture ratio to be improved while the short circuit risk is managed through subsequent precise alignment and formation processes.
2Ease of manufacture
If no insulating layer is arranged between first lead lines and pixel electrodes, then the manufacturing process is simplified, but the difficulty of detecting and measuring short circuits increases
Solution Approach 1:
The patent introduces an insulating layer as an intermediary between the first lead lines and pixel electrodes. This insulating layer with through-holes serves as a mediator that maintains electrical connection where needed while providing insulation where required, resolving the contradiction between manufacturing simplicity and short circuit detection difficulty.
3Area of moving object
If pixel electrodes are configured independently to increase aperture ratio, then the aperture ratio is improved, but the complexity of the device structure increases
Solution Approach 1:
The patent merges the function of pixel electrodes with lead line functionality by electrically coupling multiple pixel electrodes through connecting lines to form equivalent lead lines. This combination allows the aperture ratio to be improved while reducing structure complexity, as the equivalent lead line serves dual purposes: as a signal transmission path and as a means to connect multiple pixel electrodes.
Data Source
AI summary
An array substrate manufacturing method includes forming a plurality of first lead lines, a plurality of pixel electrodes, and a plurality of connecting lines over a substrate. Each first lead line is insulated from any pixel electrode, and each connecting line is insulated from any first lead line and is configured to electrically couple at least two pixel electrodes such that a set of pixel electrodes electrically coupled by each set of connecting lines substantially form an equivalent lead line. The method further includes detecting whether there is a short circuit between one equivalent lead line and a first lead line, and severing each of the plurality of connecting lines such that any two of the plurality of pixel electrodes are not electrically coupled.