OLED Panel Driving Circuit Fixed Scanning Time
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Solution Overview
Problem
Existing OLED display panel driving methods experience screen flicker when refresh frequency is switched due to changes in gamma curves, leading to poor brightness transition and user experience.
Innovation Solution
A driving method and system for OLED display panels that decouples scanning time from refresh frequency by using a preset fixed scanning time, allowing seamless dynamic refresh switching without changing gamma curves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If different gamma curves are provided for different refresh frequencies, then the display can adapt to different refresh rates, but the display brightness transitions poorly when frame rates are switched, resulting in obvious screen flicker
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the scanning time parameter based on refresh frequency. Instead of changing gamma curves, the invention modifies the scanning time parameter to adapt to different refresh frequencies, thereby avoiding screen flicker while maintaining adaptability across multiple refresh rates
Solution Approach 2:
The patent inverts the conventional approach by not changing gamma curves when refresh frequency changes. Instead, it maintains consistent gamma curves and compensates by adjusting scanning time parameters, effectively solving the flicker problem through an alternative parameter adjustment strategy
2Adaptability or versatility
If gamma curve is adaptively changed with refresh frequency, then the display can support variable refresh rates, but the brightness transition is poor and screen flicker is visible when switching frame rates
Solution Approach 1:
The patent changes the scanning time parameter dynamically based on refresh frequency requirements. By adjusting this parameter rather than gamma curves, the invention maintains smooth brightness transitions across different refresh rates while supporting variable refresh rate functionality
Solution Approach 2:
The patent introduces scanning time as an intermediary parameter that mediates between the refresh frequency control and the display output. This intermediary parameter allows smooth transitions by controlling the timing of pixel scanning, thereby maintaining brightness consistency during refresh rate switching
Data Source
AI summary
The present disclosure provides a driving method and system for an OLED display panel. The driving method for the OLED display panel includes: controlling a gate line driving circuit of the display panel for each frame image to sequentially output a scanning signal to each gate line of the display panel; and when the gate line driving circuit of the display panel starts to output the scanning signal to one gate line, timing from a starting scanning time of the same scanning gate line; and after the scanning time of the current scanning gate line reaches a preset fixed scanning time, controlling the gate line driving circuit of the display panel to stop outputting the scanning signal to the current scanning gate line. Therefore, the present disclosure does not need to change the gamma curve when the refresh frequency is changed, and screen flicker will not occur, and a seamless dynamic refresh switching of the display panel is realized.