Gate Driver Circuit Alignment Film ESD Protection
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Solution Overview
Problem
The narrow-frame TFT-LCD display devices face issues with electrostatic discharge damage to the gate driver circuit due to conductive particles in the sealant, which is exacerbated by the need to minimize sealant width to prevent frame widening, leading to risks of seal leakage and liquid crystal puncture.
Innovation Solution
The gate driver circuit is located outside the display area and covered with an alignment film, isolating it from conductive particles in the sealant, thereby reducing electrostatic discharge damage and allowing for a wider sealant width without compromising frame narrowness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the gate driver circuit is integrated on the array substrate to achieve narrow frame, then the frame width is reduced, but electrostatic discharge damage occurs from conductive particles in the sealant
Solution Approach 1:
The patent introduces an alignment film as an intermediary layer between the sealant containing conductive particles and the gate driver circuit. This alignment film acts as a mediator that prevents direct contact between the harmful conductive particles and the sensitive gate driver circuit, thereby eliminating the electrostatic discharge damage while maintaining the narrow frame design.
Solution Approach 2:
The patent converts the potentially harmful proximity of the gate driver circuit to the sealant into a beneficial arrangement by using the alignment film coverage area as a protective barrier. The same narrow frame design that brings the circuit closer to the sealant also allows the alignment film to effectively shield the circuit from electrostatic discharge.
2Reliability
If the sealant width is reduced to prevent electrostatic discharge damage, then the gate driver circuit is protected, but seal leakage and liquid crystal puncture occur
Solution Approach 1:
The alignment film serves as an intermediary protective layer that allows the sealant to maintain its original width without directly contacting the gate driver circuit. This mediator enables the sealant to provide adequate sealing function while the alignment film prevents electrostatic discharge damage, eliminating the need to reduce sealant width.
3Reliability
If the sealant width is maintained to prevent seal leakage, then sealing reliability is improved, but electrostatic discharge damage occurs to the gate driver circuit
Solution Approach 1:
The alignment film acts as a protective intermediary that allows the sealant to maintain its original width for reliable sealing while preventing electrostatic discharge damage to the gate driver circuit. The alignment film coverage area creates a physical barrier that isolates the circuit from harmful conductive particles in the sealant.
Data Source
AI summary
An array substrate and a display device are disclosed. The array substrate includes a display area and a gate driver circuit located outside of the display area. The display area is covered with an alignment film, and the gate driver circuit is also covered with the alignment film. With the array substrate, damage, caused by static electricity generated between conductive particles in a sealant and the gate driver circuit, to the gate driver circuit can be effectively reduced.