GOA Circuit Pre-Charge Modules for Display Panel Charging Speed
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Solution Overview
Problem
Traditional TFT-LCD display panels with Gate Driver On Array (GOA) circuits experience slow charging times and increased crosstalk between pixel electrodes due to long liquid crystal response times and inefficient scanning.
Innovation Solution
The addition of stage pre-charge modules in the fan-out area of the GOA circuit, utilizing multiple thin film transistors to connect and manage gate line outputs, enables pre-charge between adjacent gate lines, enhancing charging speed and reducing crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional GOA circuit scanning method is used, then the structure is simple, but the charging speed of pixel is slow and liquid crystal response time is long
Solution Approach 1:
The patent introduces a pre-charge circuit that activates before the main scanning process to preliminarily charge the pixel electrodes. This preliminary action reduces the subsequent charging time and accelerates the overall liquid crystal response, directly addressing the slow charging speed issue without fundamentally altering the traditional GOA circuit architecture
Solution Approach 2:
The charging process is divided into two distinct phases: a pre-charge phase using the pre-charge circuit and a main charging phase using the traditional GOA circuit. This segmentation allows each circuit to perform its optimized function, with the pre-charge circuit handling the initial rapid charging and the GOA circuit completing the charging process, thereby increasing overall charging speed
2Object-affected harmful factors
If traditional GOA circuit scanning method is used, then the circuit operation is simple, but crosstalk between pixel electrodes increases
Solution Approach 1:
The pre-charge circuit acts as an intermediary between the GOA circuit and the pixel electrodes, providing a controlled charging path that reduces voltage fluctuations and electromagnetic interference. This intermediary structure minimizes crosstalk between adjacent pixel electrodes while maintaining the simplicity of the original GOA circuit operation
Solution Approach 2:
The pre-charge circuit applies a preliminary voltage to the pixel electrodes before the main scanning signal arrives, counteracting potential voltage fluctuations and reducing the impact of simultaneous switching in adjacent pixels. This preliminary anti-action prevents crosstalk by stabilizing the electrode potentials before the main charging operation
Data Source
AI summary
The present invention relates to a display panel, having a display area and a fan-out area, and a GOA circuit. The GOA circuit includes a plurality of stage pre-charge modules, arranged for connecting output terminals of two adjacent gates in the GOA circuit in the fan-out area to two corresponding adjacent gate line outputs in the display area respectively. Each of the stage pre-charge modules includes a first thin film transistor, a second thin film transistor, a third thin film transistor, a fourth thin film transistor, a fifth thin film transistor and a sixth thin film transistor.