GOA Circuit TFT Isolation for Display Panel Reliability
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Solution Overview
Problem
Conventional Gate Driver on Array (GOA) circuits in liquid crystal display panels have low working reliability due to the tight distribution of Thin Film Transistor (TFT) elements, where failure of one element leads to failure of the entire circuit, hindering productivity and increasing production costs.
Innovation Solution
The GOA circuit is designed with a TFT device comprising multiple TFT units connected in a specific configuration, allowing for the isolation and removal of failed units without affecting the overall operation, thereby reducing the risk of circuit failure and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If TFT elements are closely adjacent in conventional GOA circuit, then the device size is reduced and integration is improved, but the working reliability decreases because failure of one TFT element leads to failure of the entire circuit
Solution Approach 1:
The TFT device is divided into multiple independently controllable TFT units (first-type, second-type, third-type, and fourth-type TFT units) with separate gate electrodes. Each unit can be independently controlled and isolated, so that failure of one unit does not propagate to other units. The gate electrodes are configured to enable selective activation and isolation of individual TFT units, maintaining compact integration while improving reliability through functional segmentation.
2Reliability
If multiple TFT units are used with separate gate electrodes, then the working reliability is improved by allowing isolation of failed units, but the device complexity increases
Solution Approach 1:
Multiple gate electrodes (first gate electrode, second gate electrode, third gate electrode, and fourth gate electrode) are merged into a unified gate structure that controls multiple TFT units. The gate electrodes are positioned and connected such that they collectively form an integrated control mechanism, reducing the overall structural complexity while maintaining the ability to independently control and isolate individual TFT units.
Data Source
AI summary
An array substrate, a display panel, and a display device are provided. A Thin Film Transistor (TFT) device of a Gate Driver on Array (GOA) circuit includes a first-type TFT, a second-type TFT, a third-type TFT, and a fourth-type TFT that are disposed at intervals.