Gate Driver Static Electricity Protection via Insulating Layers
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Solution Overview
Problem
Conventional liquid crystal displays (LCDs) with integrated gate drivers are vulnerable to static electricity, which can cause the gate driving circuit elements to burn out during manufacturing, as static electricity can flow through the substrate edges and damage the circuitry.
Innovation Solution
A gate driver circuit design that includes a wiring unit with signal lines connected to a shift register, featuring a first insulating layer on the signal lines and a second insulating layer on the shift register wiring, with the connection lines on the second insulating layer, preventing static electricity from causing rapid breakdown and surge currents that could burn out the circuit elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the gate driver is integrally formed on the same substrate as the TFTs, then the total size is reduced and productivity is improved, but the gate driving circuit becomes vulnerable to static electricity damage
Solution Approach 1:
A ground line is introduced as an intermediary element between the gate driver circuit and the substrate edge where static electricity enters. This ground line acts as a mediator that provides a controlled path for static electricity to reach ground potential before it can damage the circuit elements, thus protecting the integrated gate driver while maintaining substrate integration
Solution Approach 2:
The invention converts the harmful static electricity into a beneficial protective mechanism by deliberately providing a controlled discharge path through the ground line. The static electricity that would otherwise burn out circuit elements is redirected through the ground line to ground, transforming the harmful energy into a harmless discharge that protects the gate driver circuit
2Reliability
If static electricity flows through the substrate edge to the gate driver circuit, then the circuit elements are burned out, but adding protective structures increases device complexity
Solution Approach 1:
The ground line is strategically positioned only at specific locations where static electricity is most likely to enter the substrate (near the edges), rather than providing comprehensive protection across the entire substrate. This localized approach provides effective protection against static electricity while minimizing the increase in device complexity
Data Source
AI summary
In one embodiment, a display panel includes a substrate and a gate driver disposed on the substrate. The gate driver comprises a wiring unit which receives signals and a circuit unit which outputs driving signals in response to the signals received from the wiring unit. The circuit unit comprises a shift register and a shift register wiring connected to the shift register. The wiring unit comprises first through n-th signal lines (n is a natural number greater than two) arranged sequentially adjacent to the shift register. The first line is located farthest from the shift register and the n-th signal line is closest from the shift register. Further, the first signal line is electrically connected to the shift register by a first connection line that comprises a first contact portion connected to the first signal line and a second contact portion connected to the shift resistor wiring.