Display Panel Flickering Reduction via Cascade Strobe Bias Correction
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Solution Overview
Problem
Display panels experience flickering issues when displayed at low refresh frequencies, which affects the visual stability and user experience.
Innovation Solution
The display panel incorporates a cascade connection of first and second strobe driving circuits, which control the transistors in the pixel driving circuits to manage data signals and reduce brightness variation, thereby mitigating flickering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If dynamic refresh frequencies are used to reduce power consumption, then energy efficiency is improved, but flickering occurs at low refresh frequencies
Solution Approach 1:
The patent implements periodic bias voltage correction by repeatedly turning on the first transistor multiple times within each frame period. This periodic action maintains consistent light-emitting brightness across different refresh frequencies, eliminating flickering while allowing the display to operate at lower refresh rates for reduced power consumption.
2Manufacturing precision
If the first transistor is turned on multiple times in one frame period, then bias voltage correction is improved, but transistor switching frequency increases
Solution Approach 1:
The patent applies partial action by turning on the first transistor multiple times within a frame period rather than maintaining continuous operation. This approach provides sufficient bias voltage correction precision to eliminate flickering while avoiding excessive switching frequency that would increase power consumption and heat generation.
Data Source
AI summary
A display panel and a display device are disclosed. By setting numbers of effective pulses of first start signals in both a writing frame and a holding frame of one display period to be plural, a plurality of first strobe driving circuits connected in cascade are allowed to output a plurality of first strobe signals multiple times to adjust a bias voltage of a first transistor of a plurality of pixel driving circuits. Therefore, the display panel can display at a similar light-emitting brightness in both the writing frame and the holding frame, thereby improving a flickering problem of the display panel.