Pixel Circuit Driving Method for Low Refresh Rate Flickering
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Solution Overview
Problem
Existing display panels experience flickering issues when operating at relatively low refresh rates due to non-integer multiples of write and retention frame durations.
Innovation Solution
A pixel circuit driving method that includes a drive module and a voltage write module, where the voltage write module transmits a reset voltage in specific stages within the write and retention frames, adjusting the voltage state of the drive module to maintain consistent time intervals and reduce flickering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the display panel operates at a relatively low refresh rate, then power consumption is reduced, but the display screen is prone to flickering
Solution Approach 1:
The patent segments the voltage writing process into multiple stages (first stage in write frame, second stage in retention frame) to precisely control the timing of voltage adjustments. This segmentation allows the display to maintain stable voltage intervals even at low refresh rates, preventing flickering while reducing power consumption.
Solution Approach 2:
The patent dynamically adjusts the voltage writing timing based on the relationship between write frame duration and retention frame duration. When the retention frame duration is not an integer multiple of the write frame duration, the system dynamically modifies when voltage writes occur to maintain consistent time intervals, thereby eliminating flicker at variable refresh rates.
2Adaptability or versatility
If the retention frame duration is not an integer multiple of the write frame duration, then flexible refresh rates are achieved, but voltage state adjustments become inconsistent causing flickering
Solution Approach 1:
The patent implements dynamic timing adjustment where the voltage write module adapts its operation based on the specific duration relationship between write and retention frames. This dynamic approach maintains voltage state consistency across different refresh rate configurations, enabling flexible refresh rates without flickering.
Solution Approach 2:
The patent changes the timing parameters of voltage writes based on the frame duration relationship. By adjusting when voltage writes occur in different stages, the system maintains consistent voltage state intervals even when the retention frame duration is not an integer multiple of the write frame duration, thus preserving stability while enabling flexibility.
Data Source
AI summary
A driving method of a pixel circuit includes controlling a voltage write module to transmit a reset voltage to a first terminal or a control terminal of the drive module in a first stage; and controlling a voltage write module to transmit the reset voltage to the first terminal of the drive module in a second stage. An interval duration between at least one second stage and an adjacent first stage or an adjacent second stage is a first duration, and an interval duration between any second stage and an adjacent first stage or an adjacent second stage is a second duration. In at least part of display cycles, the first duration is different from a total duration of a write frame, and an absolute value of a difference between the second duration and the total duration of the write frame is less than or equal to a preset duration.