On-Panel Gate Driver Backup Layout Against Static Damage
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Solution Overview
Problem
Integrated circuits in display devices are prone to damage from static electricity during manufacturing, particularly affecting thin film transistors in gate drivers, leading to reliability issues and increased manufacturing costs.
Innovation Solution
A display device design incorporating a gate driver and a repair gate driver integrated on the substrate, with a signal line transmitting control signals, including a scanning start signal, to mitigate static electricity effects by dispersing it across the stages of the repair gate driver, thereby reducing damage to the gate driver stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If gate driver is integrated in the display panel, then the number of signal lines is decreased and manufacturing cost is reduced, but reliability is decreased due to static electricity damage to thin film transistors
Solution Approach 1:
The patent introduces a repair gate driver with the same structure as the original gate driver, positioned to receive the same control signals. This repair gate driver serves as a pre-prepared backup that can take over if the original gate driver fails due to static electricity damage during manufacturing or operation, thereby cushioning against reliability issues while maintaining the integrated design benefits
2Ease of operation
If gate driver stages are supplied with scanning start signal, then the gate driver can function properly, but the likelihood of damage to thin film transistors increases due to static electricity
Solution Approach 1:
The patent applies local quality by creating a specialized repair gate driver with identical structure to the original, positioned at a specific location to receive the same scanning start signal. This localized backup structure allows the system to maintain normal operation while having a dedicated replacement ready for the specific vulnerability point where static electricity damage is most likely to occur
Data Source
AI summary
A display device is provided, which includes, a substrate, a plurality of gate lines formed on the substrate, a gate driver disposed on the substrate and transmitting gate signals to the gate lines, a repair gate driver disposed on the substrate and having a structure substantially the same as that of the gate driver, and a signal line coupled to the gate driver and the repair gate driver and transmitting at least one control signal to the gate driver.