Display Driving Circuit With Region-Based Variable Refresh
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Solution Overview
Problem
Existing electronic devices face challenges in improving display quality while reducing power consumption, particularly in scenarios where still images and video content are displayed simultaneously.
Innovation Solution
The electronic device employs a driving circuit that allows for variable driving frequencies, including a still-image mode and a multi-frequency mode, where still-image areas operate at lower frequencies and video areas operate at higher frequencies, optimizing power usage and display refresh based on image type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the operating frequency of the electronic device is increased, then the display quality of the image is improved, but the power consumption increases
Solution Approach 1:
The display panel is divided into multiple regions (first display region and second display region), and each region is driven at different frequencies according to the type of content displayed. This segmentation allows the system to optimize power consumption by driving static content at lower frequencies while maintaining high refresh rates for dynamic content, thereby resolving the contradiction between display quality and power consumption.
Solution Approach 2:
The driving frequency of each display region is dynamically adjusted based on the characteristics of the displayed content (still image vs. video). The driving controller determines the frequency requirements for each region and adjusts the driving frequency accordingly, enabling the system to achieve high display quality when needed while reducing power consumption during static display periods.
2Use of energy by moving object
If the operating frequency is lowered to reduce power consumption, then power consumption is reduced, but the display quality deteriorates
Solution Approach 1:
Different regions of the display panel are assigned different driving frequencies based on their specific requirements. Regions displaying still images are driven at lower frequencies to save power, while regions displaying video content maintain higher frequencies to ensure display quality. This local differentiation allows the system to reduce overall power consumption without compromising the display quality of dynamic content.
Solution Approach 2:
The driving frequency parameter is changed dynamically based on the content type displayed in each region. By adjusting this critical parameter according to actual needs, the system can achieve significant power savings during static display while maintaining high display quality during video playback, effectively resolving the contradiction between power consumption and display quality.
3Manufacturing precision
If the processor continuously outputs transmission signals to refresh the display, then the display quality is maintained, but the power consumption increases
Solution Approach 1:
The display refresh is performed periodically at different frequencies for different regions based on content requirements. Still image regions are refreshed at lower frequencies or only when content changes, while video regions maintain higher refresh frequencies. This periodic action strategy reduces the overall number of refresh operations, thereby lowering power consumption while maintaining display quality where needed.
Solution Approach 2:
The driving controller autonomously determines which regions require refresh based on the content characteristics, eliminating the need for continuous processor intervention. The system self-adjusts the refresh frequency of each region, reducing the processing burden and power consumption associated with continuous signal output while maintaining display quality through intelligent, content-aware refresh management.
Data Source
AI summary
An electronic device includes a display panel, a processor which outputs a transmission signal, and a driving controller which receives the transmission signal and outputs an image data signal based on the transmission signal in a way such that an image is displayed on the display panel. The driving controller includes a memory that stores the image data signal. The processor outputs the transmission signal when a current image corresponding to a part of the display panel is different from a previous image corresponding to the part of the display panel in a still-image mode. The driving controller allows the display panel to be refreshed by the image data signal read from the memory when a display time of a still image corresponding to the part of the display panel reaches a predetermined time in the still-image mode.