Display Driving Controller Luminance Compensation Multi-Frequency
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Solution Overview
Problem
Display devices operating at high driving frequencies experience increased power consumption, leading to luminance deviations between different display areas when displaying videos and still images, which affects display quality and efficiency.
Innovation Solution
A display device with a driving controller that compensates for luminance deviations by using multi-frequency driving modes, where one area is driven at a higher frequency for videos and another at a lower frequency for still images, utilizing lookup tables to provide different image data signals and adjusting grayscale values based on target luminance, thereby reducing power consumption while maintaining display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the driving frequency is increased to improve video display quality, then the display quality of video is improved, but power consumption increases
Solution Approach 1:
The display panel is divided into multiple display areas, each independently driven at different frequencies according to the type of content being displayed. Video areas are driven at higher frequencies while still image areas are driven at lower frequencies, allowing simultaneous optimization of display quality and power consumption across different regions.
Solution Approach 2:
The driving frequency of each display area is dynamically adjusted based on the type of image content (video or still image) being displayed. The driving controller detects the content type and switches between high-frequency mode for videos and low-frequency mode for still images, enabling adaptive power management.
2Use of energy by moving object
If multi-frequency driving is used to reduce power consumption, then power consumption is reduced, but luminance deviation between display areas occurs
Solution Approach 1:
Different display areas are assigned different driving frequencies based on their specific content requirements. The luminance compensation unit applies area-specific correction values to each display area to ensure that despite different driving frequencies, the perceived luminance remains uniform across the entire display panel.
Solution Approach 2:
The system incorporates a luminance compensation unit that calculates and applies correction values based on the detected image content and driving frequency combinations. This feedback mechanism continuously adjusts the driving parameters to maintain luminance uniformity across display areas operating at different frequencies.
Data Source
AI summary
The display device includes a display panel in which a first display area and a second display area adjacent to the first display area are defined, a data driving circuit which drives the plurality of data lines, a scan driving circuit which drives the plurality of scan lines, and a driving controller which receives an image signal and a control signal, and controls the data driving circuit and the scan driving circuit based on an operation mode, where the driving controller includes a luminance deviation compensation unit which compensates for luminance deviation of the first display area and the second display area when the operation mode is a multi-frequency mode in which the first display area is driven at a first frequency and the second display area is driven at a second frequency different from the first frequency.