Display Panel Pulse Timing for Low-Refresh Flicker Control
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Solution Overview
Problem
Display panels with low fundamental frequencies experience flickering due to unequal widths of light-emitting control signals, affecting user experience.
Innovation Solution
A display panel design that adjusts the non-enable level durations of light-emitting control signal pulses and increases the frequency of the light-emitting control signal during data writing frames, ensuring the frequency is higher than the reference refresh frequency, with specific pulse ratios and additional light-emitting holding frames to maintain high frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the light-emitting control signal uses unequal pulse widths to control light emission, then the display panel can achieve precise light emission control, but at low refresh frequencies this causes flickering that is perceptible to users
Solution Approach 1:
The patent applies periodic action by using multiple light-emitting control signals with different pulse widths within one display refresh cycle. Specifically, it divides the refresh cycle into multiple frames, with some frames using a first pulse width and others using a second pulse width, creating a periodic pattern that averages out to reduce flicker while maintaining precise light emission control
Solution Approach 2:
The patent changes the pulse width parameter of the light-emitting control signal dynamically across different frames. By alternating between at least two different pulse width values (first pulse width and second pulse width) within a single refresh cycle, the system achieves both precise light control and reduced flicker perception
2Use of energy by moving object
If the display panel operates at low refresh frequency to save power, then energy consumption is reduced, but flickering becomes more noticeable and user experience deteriorates
Solution Approach 1:
The patent uses periodic action by implementing alternating frame rates within a single refresh cycle. Some frames are displayed at a higher first refresh frequency while others are displayed at a lower second refresh frequency, creating a periodic pattern that reduces average power consumption while maintaining visual smoothness through the alternating high-frequency frames
Data Source
AI summary
The present disclosure provides a display panel and a display apparatus. The display panel includes a pixel circuit, and the pixel circuit includes a driving transistor, a light-emitting control transistor and a light-emitting device; the driving transistor is electrically connected to a power supply voltage terminal and the light-emitting control transistor, respectively; the light-emitting control transistor is electrically connected to the light-emitting device, and a gate of the light-emitting control transistor is connected to a light-emitting control signal line to receive the light-emitting control signal transmitted by the light-emitting control signal line; a plurality of pulses of the light-emitting control signal include a first pulse and a second pulse, and a non-enable level duration of the first pulse is greater than a non-enable level duration of the second pulse; in the first display mode, a picture refresh frame of the display panel includes a data writing frame, and in the data writing frame, the frequency of the light-emitting control signal is greater than a reference refresh frequency of the display panel. The technical solution solves the problem in the prior art that the unequal width design of the light-emitting control signal for the display screen with a low fundamental frequency is easily perceived by the human eye as flickering.