Display Panel Pre-Charging Control for Faster LCD Field Sequence Response
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Solution Overview
Problem
Conventional field sequence display methods in LCD panels cause abnormal color-mixing due to long liquid crystal response times and inability to control image display at different regions, leading to degraded visual experience.
Innovation Solution
Incorporating a pre-charging control module in the gate driving units of the display panel to pre-charge pixel units before image display, minimizing grayscale value differences between sub-frame images through controlled pre-charging signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional field sequence display method is used to turn on R/G/B LEDs one field at a time, then color image display effect is achieved, but liquid crystal response time becomes too long causing abnormal color-mixing
Solution Approach 1:
The patent applies preliminary action by pre-charging the liquid crystal before the actual image display. A pre-charging control module charges the liquid crystal to a preset voltage value before the field sequence display begins, so that when the display starts, the liquid crystal is already in a prepared state and can respond faster to voltage changes, reducing the response time and preventing abnormal color-mixing while maintaining good color display effect
2Device complexity
If conventional field sequence display method is used without regional control, then display implementation is simplified, but abnormal color-mixing occurs due to inability to control different regions
Solution Approach 1:
The patent applies local quality by dividing the display into different regions and implementing different pre-charging strategies for different regions. The pre-charging control module can selectively apply pre-charging to specific regions based on their requirements, allowing regional control of the liquid crystal charging process. This improves image display quality by preventing abnormal color-mixing in specific regions while maintaining a manageable control structure through the modular pre-charging control module
3Duration of action of moving object
If pre-charging control module is added to gate driving units, then liquid crystal response time is reduced and abnormal color-mixing is improved, but device structure becomes more complex
Solution Approach 1:
The patent applies merging by integrating the pre-charging control module with the existing gate driving units. Instead of adding completely separate pre-charging circuitry, the pre-charging control functionality is merged into the gate driving unit structure, sharing common components and control pathways. This reduces the overall device complexity increase while still achieving the goal of reducing liquid crystal response time and preventing abnormal color-mixing
Data Source
AI summary
The embodiments of the present application provide a display panel and a display device. The display panel includes data lines, pixel units, a plurality of gate driving units connected in cascade. At least one gate driving unit includes a pre-charging control module electrically connected with a pre-charging control signal terminal and a scanning signal output terminal of the present stage. The pre-charging control module outputs the pre-charging control signals to the scanning signal output terminal of the present stage, and the data lines output the pre-charging control signals to the corresponding pixel units.