Display Panel Control Device for Flicker Suppression
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Solution Overview
Problem
Conventional display devices experience flicker phenomena due to variable frame periods caused by GPU processing power, leading to mismatched light emission and display timings.
Innovation Solution
A display panel control device that adjusts light emission luminance based on a luminance adjustment parameter, ensuring the total light emission amount during one frame period remains constant regardless of the number of vertical lines, by deriving parameters such as Vmin/Vnow or 1−Vdiff/(Vmin+Vdiff) to maintain consistent light emission across varying frame periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the frame period is set to be constant, then the display timing can be pre-set, but the actual display timing does not match when GPU processing power varies, causing flicker
Solution Approach 1:
The patent applies dynamics by making the frame period variable rather than fixed. The control device dynamically adjusts the frame period based on the actual number of vertical lines in the video signal, allowing the display system to adapt to different GPU processing capabilities and content requirements, thereby eliminating flicker caused by timing mismatches
Solution Approach 2:
The patent implements feedback by detecting the actual number of vertical lines in the video signal and using this information to adjust the frame period. The control device receives feedback about the video content characteristics and modifies the display timing accordingly, ensuring synchronization between the displayed content and the light emission timing
2Illumination intensity
If the on-duty ratio is determined based on estimated vertical lines, then light emission can be controlled, but the total light emission amount varies when the actual number of vertical lines differs from estimated
Solution Approach 1:
The patent applies parameter changes by adjusting the light emission luminance based on the actual number of vertical lines detected in the video signal. When the actual vertical line count differs from the estimate, the control device modifies the luminance parameter to compensate, ensuring that the total light emission amount remains constant across different display scenarios
Data Source
AI summary
A control device includes a data storing unit, a synchronization control unit, a light emission control unit, and a luminance adjustment unit. The light emission control unit derives a luminance adjustment parameter for adjusting a light emission luminance of light emitting elements when a video image is displayed with a total number of vertical lines in a current frame such that a total light emission amount of the light emitting elements during one frame period when the video image is displayed with the total number of vertical lines in the current frame is equal to a total light emission amount of the light emitting elements during one frame period when a video image is displayed with a pre-set minimum number of vertical lines. The luminance adjustment unit adjusts, based on the luminance adjustment parameter, the light emission luminance of the light emitting elements.