Gamma Correction Circuit Offset for Display Refresh Rate
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Solution Overview
Problem
Variations in refresh rate and light emission duty in display units cause variations in gamma characteristics, leading to inconsistent image quality.
Innovation Solution
A picture signal processing circuit with a gamma correction section and a gamma modification section that provides an offset component corresponding to the refresh rate and light emission duty to correct gamma characteristics, ensuring consistent image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the refresh rate or light emission duty is varied to adapt to different picture signal formats or driving modes, then the display unit can support multiple operating conditions, but the gamma characteristics vary causing image quality inconsistency
Solution Approach 1:
The gamma correction characteristics are made dynamic by introducing a gamma modification section that adjusts the gamma characteristics according to the refresh rate and light emission duty. Instead of using fixed gamma correction, the system dynamically modifies the gamma characteristics to maintain consistent image quality across different operating conditions, directly resolving the contradiction between adaptability and reliability
Solution Approach 2:
The invention changes the parameters of gamma correction by adding an offset component that varies with refresh rate and light emission duty. By modifying the gamma correction parameters dynamically based on operating conditions, the system maintains consistent luminance characteristics across different picture signal formats and driving modes, thereby preserving image quality consistency while supporting multiple operating conditions
2Reliability
If gamma correction is performed to correct non-linear optical response, then image quality is improved, but additional processing complexity is introduced
Solution Approach 1:
The gamma correction process is segmented into two distinct sections: a gamma correction section that performs the basic gamma correction, and a gamma modification section that adds the refresh rate and light emission duty dependent offset component. This segmentation allows the system to maintain image quality while organizing the processing complexity into modular, manageable sections with clear functional separation
Data Source
AI summary
A picture signal processing circuit includes a gamma correction section configured to perform gamma correction on a picture signal; and a gamma modification section configured to provide an offset component corresponding to one or both of a refresh rate and a light emission duty, to the picture signal gamma-corrected by the gamma correction section.