GOA Display Substrate Jumper Layout Against ESD Short-Circuits
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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 interaction, and using transparent conducting layers to ensure electrical connections without interference from static electricity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the common electrode wire and patch panel are placed close together to achieve narrow bezel design, then the display aesthetics and bezel width are improved, but electro-static discharge occurs between them causing short-circuits and display defects
Solution Approach 1:
The patent applies dimensionality change by routing the jumper wire through multiple layers (different z-dimensions) to bypass the gap between the common electrode wire and patch panel. The jumper includes a first sub-jumper on a first layer and a second sub-jumper on a second layer, creating a three-dimensional path that avoids the harmful proximity in the planar view while maintaining electrical connection.
Solution Approach 2:
The jumper wire acts as an intermediary element that bridges the gap between the patch panel and the output transistor. By introducing this intermediate connection path that overlaps with the gap region, the patent prevents direct electro-static discharge while maintaining the necessary electrical connection through the gap area.
2Reliability
If a jumper is added to bypass the gap between common electrode wire and patch panel, then short-circuit prevention is improved, but device complexity increases due to additional wiring layers
Solution Approach 1:
The jumper is segmented into multiple sub-jumpers (first sub-jumper and second sub-jumper) located on different layers. This segmentation allows the single jumper function to be distributed across multiple layers, reducing the complexity on any single layer while achieving the overall bypass function through vertical integration.
Solution Approach 2:
The jumper structure employs a nested arrangement where the first sub-jumper and second sub-jumper are positioned on different layers with their orthographic projections overlapping. This nested configuration in the vertical dimension allows the jumper to pass through the gap region without adding horizontal complexity, as the components nest within each other's projection area.
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.