Gate Driving Circuit Shift Mode Control for Display Panels
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Solution Overview
Problem
In display devices with gate driving circuits on both sides of the panel, abnormal operations can lead to only a portion of the screen being driven, causing image display issues and polarizing film excitation due to heat generation and static electricity.
Innovation Solution
A display device with first and second gate driving circuits on either side of the panel, controlled by a timing controller that shifts the gate pulse in two modes based on a reference time interval between carry signals, ensuring normal operation by switching between scan directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If gate driving circuits are disposed on both sides of the display panel, then the coverage of the display device is improved, but the risk of partial screen driving failure due to abnormal operation is increased
Solution Approach 1:
The timing controller monitors carry signals from both gate driving circuits and compares their time intervals against a reference value. When abnormal operation is detected (time interval exceeds reference), the system automatically switches shift modes to maintain full screen coverage, ensuring reliability while preserving display coverage
Solution Approach 2:
The system dynamically switches between first and second shift modes based on real-time monitoring of carry signal time intervals. This dynamic adaptation allows the gate driving circuits to maintain full screen coverage even when one side experiences abnormal operation, resolving the contradiction between expanded coverage and operational reliability
2Productivity
If gate driving circuits operate continuously, then productivity is improved, but heat generation excites the polarizing film causing harmful effects
Solution Approach 1:
The system implements periodic monitoring of carry signal time intervals and periodically switches between bidirectional shift modes. This periodic operation maintains continuous productivity while distributing heat generation across different operating cycles, preventing sustained overheating that would excite the polarizing film
3Adaptability or versatility
If bidirectional shift function is implemented, then adaptability is improved, but device complexity increases
Solution Approach 1:
The timing controller integrates multiple functions into a single device: it generates gate timing control signals, monitors carry signals from both gate driving circuits, compares time intervals, and switches shift modes. This multi-functionality achieves bidirectional adaptability while minimizing the increase in overall device complexity by consolidating control functions
Data Source
AI summary
A display device and a method of controlling a gate driving circuit thereof are discussed. The display device includes a display panel, first and second gate driving circuits which are respectively disposed on both sides of the display panel, and a timing controller. The timing controller controls the first and second gate driving circuits in conformity with a first shift mode, compares carry signals received from the first and second gate driving circuits, and controls the first and second gate driving circuits in conformity with a second shift mode when a time interval between the carry signals is greater than a previously determined reference value.