Display Driver Timing Control for Multi-Area Refresh Rate Power Saving
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Solution Overview
Problem
Electronic devices with multiple display areas consume excessive power due to all areas operating at the same high refresh rate, even when not all require it.
Innovation Solution
A display driver chip with a timing controller generates divided clock signals and enable signals for each display area, allowing different refresh rates based on specific requirements, reducing power consumption by adjusting frequencies accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all display areas operate at the same high refresh rate, then display quality is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by assigning different refresh rates to different display areas based on their specific requirements. The timing controller generates separate enable signals (ENABLE1, ENABLE2, etc.) for each display area, allowing each area to operate at an optimal refresh rate rather than forcing all areas to use the same high refresh rate, thus reducing overall power consumption while maintaining display quality where needed
Solution Approach 2:
The patent implements dynamics by making the refresh rate configurable and adjustable for each display area through clock division parameters. The system can dynamically adjust the refresh rates of different display areas independently through the timing controller's clock division module, allowing flexible adaptation to different display scenarios and content requirements
2Speed
If all display areas operate at the same high refresh rate, then display smoothness is improved, but energy efficiency deteriorates
Solution Approach 1:
The patent segments the display into multiple independent display areas (DISPLAY AREA 1, DISPLAY AREA 2, etc.), each with its own clock division parameter and enable signal. This segmentation allows each area to be controlled independently with different refresh rates, so that areas requiring high refresh rates for smooth content can maintain it, while other areas can use lower refresh rates to conserve energy
Solution Approach 2:
The patent uses parameter changes by adjusting the clock division parameters (DIVISION PARAMETER 1, DIVISION PARAMETER 2, etc.) to set different refresh rates for different display areas. The timing controller modifies the clock signal parameters dynamically to achieve the desired refresh rates, enabling flexible energy efficiency optimization without compromising display smoothness where required
Data Source
AI summary
Embodiments of this application are applied to the field of electronic technologies, and provide a method for setting a refresh rate, a display driver chip, and an electronic device. The method includes: generating a divided clock signal corresponding to each display area based on a preset clock signal and a clock division parameter corresponding to each display area, and generating a second enable signal corresponding to each display area based on the divided clock signal corresponding to each display area and a corresponding first enable signal, where the second enable signal corresponding to each display area is configured for driving the display area corresponding to the second enable signal to perform display at a target refresh rate. Therefore, at least some of the display areas can perform display at different refresh rates, thereby reducing power consumption of an electronic device.