Array Substrate Capacitive Line Layout for Scan Line Repair
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Solution Overview
Problem
The existing method of repairing broken scan lines in array substrates of display devices by connecting repair lines often leads to bright spots, which is a common issue in liquid crystal displays.
Innovation Solution
The array substrate design includes a first gate line with a break in a conductive segment proximate to a charging coupling point, where the break is positioned away from the data line and deviates from the middle subsection, and is coupled to a repair capacitive line with specific breaks and bridges to ensure proper alignment and connection with transistors, minimizing bright spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repair lines are connected to two sides of a breaking point of a scan line, then the broken scan line is repaired, but bright spots are caused
Solution Approach 1:
The patent introduces a repair capacitive line as an intermediary element to connect the two sides of the broken scan line. Instead of directly connecting the breaking points with a repair line (which causes bright spots), the capacitive line serves as a mediator that restores electrical continuity while avoiding the bright spot issue through its specific structural design with breaks and bridges
Solution Approach 2:
The repair capacitive line is divided into multiple segments with intentional breaks rather than being a continuous line. The first conductive segment has a first break, and there are multiple bridges connecting different segments. This segmentation allows the repair structure to avoid causing bright spots while still maintaining the necessary electrical connection for scan line repair
2Reliability
If repair lines are connected to two sides of a breaking point of a scan line, then the broken scan line is repaired, but the repair structure becomes complex
Solution Approach 1:
The repair capacitive line serves multiple functions: it repairs the broken scan line, provides capacitance for signal coupling, and incorporates breaks and bridges that simplify the repair structure. By making the repair structure multi-functional, the patent reduces overall complexity while achieving reliable repair
Solution Approach 2:
The breaks and bridges are pre-designed into the repair capacitive line structure before actual repair is needed. The first break is positioned at a specific location, and bridges are pre-planned at optimal positions. This preliminary design simplifies the repair process and reduces structural complexity compared to ad-hoc repair methods
Data Source
AI summary
An array substrate includes a substrate, a first gate line, a plurality of data lines, a plurality of first pixel electrodes, a plurality of first transistors and a plurality of first capacitive lines that are all disposed on the substrate. A data line and the first gate line cross, and are insulated from each other. An orthographic projection of a first capacitive line on the substrate is overlapped with an orthographic projection of a first pixel electrode on the substrate. The first capacitive line includes a first conductive segment that is proximate to the first gate line and is provided with a first break therein. An orthographic projection, on the substrate, of a portion of the first conductive segment located on a side of the first break away from the middle subsection is overlapped with an orthographic projection of a second electrode of a first transistor on the substrate.