Display Panel Regional Scan Driving for Mixed Refresh Rates
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Solution Overview
Problem
Fabricating a display device capable of high driving frequency operation increases costs, which is a challenge in achieving better display quality.
Innovation Solution
A display device is designed with a driving controller that divides the display panel into multiple regions, applying different driving frequencies to each region, with one region operating at a higher frequency for improved image quality and another at a lower frequency for reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the display device is fabricated to operate at a high driving frequency, then the display quality of video images is improved, but the fabrication cost increases
Solution Approach 1:
The display panel is divided into multiple regions (first display region and second display region) that can be driven at different frequencies. The driving controller segments the scanning process into first scanning operation for the first display region and second scanning operation for the second display region, allowing each region to operate at its optimal frequency without requiring the entire panel to be fabricated for high-frequency operation.
Solution Approach 2:
Different regions of the display panel are assigned different driving frequencies based on their specific requirements. The first display region operates at a first driving frequency while the second display region operates at a second driving frequency, allowing each region to have the quality characteristics needed for its specific application without incurring the full fabrication cost of a high-frequency display.
2Manufacturing precision
If the display device operates at a high driving frequency, then the display quality is improved, but the power consumption increases
Solution Approach 1:
The display panel is segmented into multiple regions with different frequency requirements. The driving controller performs first scanning operation at a first driving frequency for the first display region and second scanning operation at a second driving frequency for the second display region, reducing overall power consumption by not driving the entire panel at high frequency.
Solution Approach 2:
Each display region is driven at its optimal frequency: the first display region operates at a first driving frequency suitable for its content requirements while the second display region operates at a second driving frequency, minimizing power consumption across the entire display system.
Data Source
AI summary
A display device includes a display panel, a data driving circuit, a scan driving circuit, and a driving controller. The driving controller receives an image signal and a control signal and controls the data and scan driving circuits to display an image on the display panel. The driving controller divides the display panel into first and second display regions based on the image signal, and outputs start and masking signals indicating starts of one frame and the second display region, respectively. First and second frames have first and second durations, respectively. The scan driving circuit sequentially drives scan lines in synchronization with the start signal and stop the driving of scan lines, corresponding to the second display region, of the scan lines, in response to the masking signal.