Multi-Frequency Display Panel Gamma Compensation
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Solution Overview
Problem
Display devices face challenges in reducing power consumption while maintaining display quality, particularly in scenarios where different types of content (moving vs. still images) are displayed, as existing technologies do not efficiently manage driving frequencies to optimize energy usage without compromising image quality.
Innovation Solution
A display device and driving method that divide the display panel into areas driven at different frequencies, with a driving controller adjusting the frequency of the second display area to a lower frequency during a multi-frequency mode, using a lookup table to compensate for gamma level differences between areas, thereby reducing power consumption without degrading image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If the entire display panel is driven at a high frequency, then display quality is maintained, but power consumption increases
Solution Approach 1:
The display panel is divided into multiple display areas (first display area and second display area) that can be driven at different frequencies. The driving controller selectively drives each area at its respective frequency based on content type, allowing the first display area to operate at a first driving frequency and the second display area to operate at a second driving frequency, thereby reducing overall power consumption while maintaining display quality where needed.
2Use of energy by stationary object
If different display areas are driven at different frequencies, then power consumption is reduced, but gamma level differences cause image quality degradation
Solution Approach 1:
The driving controller applies gamma compression to the image signal specifically for the second display area driven at the lower second driving frequency. This parameter adjustment compensates for the gamma level differences that would otherwise arise from driving different areas at different frequencies, ensuring consistent image quality across the entire display panel while maintaining the power savings from differential frequency operation.
Data Source
AI summary
A display device includes a display panel that includes a first display area and a second display area, a data driving circuit which drives a plurality of data lines, a scan driving circuit which drives a plurality of scan lines, and a driving controller which controls the data driving circuit and the scan driving circuit such that the first display area is driven at a first driving frequency, and the second display area is driven at a second driving frequency lower than the first driving frequency during a multi-frequency mode, where the driving controller receives an image signal and provides to the data driving circuit an image data signal obtained by compensating for a gamma level of the image signal corresponding to the second display area during the multi-frequency mode.