Gate Driver Chamfering Module for Display Panel Miniaturization
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Solution Overview
Problem
Conventional display panel designs face challenges in miniaturization due to the need for a common chamfering circuit, which cannot optimize chamfered waveforms for different partitions, leading to uneven displaying effects caused by RC delay.
Innovation Solution
A gate driver with integrated chamfering and digital adjustable resistance modules, allowing independent control of chamfered waveforms for each partition, eliminating the need for a separate chamfering circuit on the control board and enabling miniaturization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a common chamfering circuit is used on the control board, then the displaying effect can be improved, but the control board area increases and miniaturization becomes difficult
Solution Approach 1:
The chamfering function is extracted from the control board and integrated into the gate driver chip. This removes the need for a separate chamfering circuit on the control board, reducing the control board area while maintaining the chamfering effect for display uniformity.
Solution Approach 2:
The chamfering module is merged with the gate driver by integrating it into the same chip. This combination eliminates the need for separate control board circuits and enables miniaturization while preserving the displaying uniformity improvement.
2Device complexity
If a common chamfering circuit is used for the entire display panel, then the circuit design is simplified, but different partitions cannot have optimized chamfered waveforms
Solution Approach 1:
The gate driver is divided into multiple independent gate driving units, each capable of independent chamfering control for different partitions. This segmentation allows each partition to have optimized chamfered waveforms while maintaining overall system functionality.
Solution Approach 2:
The chamfering control is made dynamic and adjustable for each partition through digital signals. Each gate driving unit can independently adjust its chamfering parameters, enabling adaptability for different partitions while keeping the circuit design manageable.
3Device complexity
If RC delay effect is not compensated, then the circuit design is simpler, but the displaying effect is uneven between left and right sides
Solution Approach 1:
The chamfering module performs preliminary action by pre-adjusting the gate signals before they are output to the display panel. This preliminary chamfering compensates for the RC delay effect, ensuring uniform displaying across the entire panel while maintaining circuit simplicity.
Data Source
AI summary
Provided is a gate driver for use in a display panel. The gate driver includes a chamfering module configured to receive gate turn-on voltage signals and square wave controlling signals and chamfer the gate turn-on voltage signals in accordance with the square wave controlling signals to generate and output chamfered gate turn-on voltage signals, and a level shifting module configured to receive the chamfered gate turn-on voltage signals, input voltage signals and gate cut-off voltage signals, and output the chamfered gate turn-on voltage signals or the gate cut-off voltage signals in accordance with a voltage value of the input voltage signal. By integrating a chamfering module and a digital adjustable resistance module into a gate driver, it is not necessary to provide a chamfering circuit on a CB of display panel, so as the CB can be miniaturized.