GOA Display Substrate Wiring for Narrow-Bezel ESD Prevention
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Solution Overview
Problem
The generation of electro-static discharge (ESD) between the common electrode wire and the patch panel in gate driver on array (GOA) technology leads to short-circuits and poor display quality, such as horizontal dark lines and stripes, due to the close proximity of these components in narrow bezel designs.
Innovation Solution
A display substrate design that includes a jumper with multiple sub-jumpers arranged on different layers and overlapping projections to bypass the gap between the common electrode wire and the patch panel, preventing short-circuits by electrostatic interactions, and using transparent conducting layers to ensure electrical connections without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the bezel region is narrowed to achieve aesthetic design, then the display substrate achieves symmetrical and narrow-bezel aesthetic design, but electro-static discharge occurs between the common electrode wire and the patch panel causing short-circuits
Solution Approach 1:
The patent introduces a third dimension by routing the jumper wire through the bezel region's thickness (from the second substrate toward the first substrate) rather than maintaining a planar arrangement. This vertical routing allows the jumper to pass through the gap between the common electrode wire and patch panel without increasing the lateral bezel width, thereby preventing short-circuits while preserving narrow-bezel aesthetic design.
Solution Approach 2:
The jumper wire acts as an intermediary connection element that bridges the gap between the patch panel and the output transistor. By strategically positioning the jumper in the bezel region and routing it through the gap, it serves as a mediator that maintains electrical connectivity while physically separating the common electrode wire and patch panel to prevent electro-static discharge.
2Device complexity
If the jumper is routed close to the common electrode wire to save space, then the wiring layout is compact, but electro-static discharge causes horizontal dark lines and stripes
Solution Approach 1:
The patent extracts the jumper wire's routing path from the planar wiring layer and places it in the vertical bezel region. This extraction separates the jumper's path from the common electrode wire, removing the harmful electro-static interaction while maintaining the compactness of the overall wiring layout through efficient use of the bezel's three-dimensional space.
Data Source
AI summary
A display substrate includes a base substrate having a display region and a bezel region; in the bezel region, a shift register includes an output transistor, a first electrode of the output transistor is an output end of the shift register; a patch panel is between the shift register and the display region, includes a first sub-patch panel on the same layer as the gate of the output transistor; a common electrode wire is between the shift register and the display region, there is a gap between the common electrode wire and the patch panel; a jumper includes a first sub-jumper and a second sub-jumper, the first sub-jumper is above a layer where the output transistor is, and the second sub-jumper is arranged on a different layer from the first sub-patch panel; the first sub-jumper and the first sub-patch panel overlap each other, the second sub-jumper don't overlap the gap.