Display Panel Pad Layout With Dummy Pad Isolation
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Solution Overview
Problem
As the resolution of display panels increases, the gap between signal lines narrows, leading to a higher chance of defects such as burnt or short circuits due to the characteristics of adjacent signals.
Innovation Solution
The introduction of a dummy pad between adjacent pads with large potential differences, as well as between electrostatic high-potential and low-potential pads, to reduce pad defects and enable stable operation at low power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the resolution of display panels is increased, then the image quality is improved, but the gap between signal lines narrows leading to a higher chance of defects
Solution Approach 1:
An additional pad is introduced as an intermediary element between adjacent pads with large potential differences. This additional pad acts as a buffer or mediator that prevents direct interaction between high-potential and low-potential signals, thereby reducing the risk of defects such as burnt pads or short circuits while maintaining high display resolution.
2Device complexity
If pads with large potential difference are arranged adjacent to each other, then the device complexity is reduced, but pad defects increase due to signal characteristics
Solution Approach 1:
The additional pad serves as a mediator between high-potential and low-potential pads, preventing direct harmful interaction while maintaining a relatively simple overall pad arrangement. This intermediary structure isolates the potential difference effects without requiring complete redesign of the pad layout.
Solution Approach 2:
The pad arrangement is segmented into distinct groups: high-potential pads, additional buffer pads, and low-potential pads. This segmentation creates physical and electrical separation between pads with large potential differences, reducing defect risks while maintaining organizational simplicity.
3Area of stationary object
If signal lines are placed closer together, then the area is reduced, but the chance of burnt or short circuit defects increases
Solution Approach 1:
The additional pad acts as a protective intermediary between signal lines with large potential differences. By placing this buffer pad between high and low potential lines, the patent reduces the risk of short circuits and burnt pads while maintaining compact signal line spacing and minimizing overall area.
Data Source
AI summary
A display panel and a display device are disclosed and, more specifically, the display panel includes a substrate including a display area where a plurality of subpixels are disposed, a gate driving circuit disposed in a non-display area outside the display area to supply a plurality of scan signals to the plurality of subpixels, an electrostatic discharge unit disposed in the non-display area, and a plurality of pads disposed in the non-display area and coupled with a plurality of signal lines electrically connected to the gate driving circuit and the electrostatic discharge unit, wherein the plurality of pads include, as sequentially disposed, a clock pad connected with a clock signal line, a first line pad connected with a first power line, an additional pad connected with an electrostatic discharge high-potential voltage line and an electrostatic discharge low-potential voltage line, and a second line pad connected with a second power line.