Dummy Pattern for Static Electricity Protection in Display Panels
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Solution Overview
Problem
Display devices are prone to damage from static electricity due to pattern differences between signal and non-signal areas, which can lead to defects in transistors, especially at the boundary of the active area.
Innovation Solution
A dummy pattern with a shape identical or similar to the signal area lines is positioned between the signal and non-signal areas and extended outside the active area to act as a static electricity barrier, preventing static electricity from reaching the signal area lines and transistors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dummy pattern is added between signal and non-signal areas to prevent static electricity, then reliability is improved, but device complexity increases
Solution Approach 1:
A dummy pattern is introduced as an intermediary element between the signal area and non-signal area. This dummy pattern acts as a mediator that intercepts and redirects static electricity away from critical signal lines, preventing direct interaction between the harmful static charge and the signal transmission paths.
Solution Approach 2:
The dummy pattern is positioned in advance at the boundary between signal and non-signal areas, creating a protective barrier before static electricity can reach the signal lines. This preliminary placement ensures that when static electricity occurs, it is already blocked or redirected by the pre-positioned dummy pattern.
2Reliability
If the dummy pattern is extended outside the active area, then protection coverage is improved, but manufacturing precision requirements increase
Solution Approach 1:
The dummy pattern is strategically extended only in specific locations where static electricity protection is most critical - specifically at the boundaries between signal and non-signal areas and outside the active area where transistors are located. This localized extension approach provides maximum protection coverage while minimizing the overall area occupied by dummy patterns.
Data Source
AI summary
A display device comprising a display panel that includes an active area, the active area including a data line positioned on a substrate in a first direction and transferring a data signal, a gate line positioned on the substrate in a second direction and transferring a gate signal, a thin film transistor connected to the gate line and the data line, and a plurality of pixels driven by the thin film transistor, a first pad coupled to a first signal line disposed in a data signal area wherein the first signal line is connected to the data line, and a first non-signal line disposed in a first non-signal area wherein the first non-signal line is disconnected from the data line, the first non-signal area being disposed outside the data signal area, a second pad coupled to a second signal line disposed in a gate signal area wherein the second signal line is connected to the gate line, and a second non-signal line disposed in a second non-signal area wherein the second non-signal line is disconnected from the gate line, the second non-signal area being disposed outside the gate signal area; and a dummy pattern disposed between the data signal area and the first non-signal area, or disposed between the gate signal area and the second non-signal area.