Display Driver Circuit Frame Rate Boost via Area Segmentation
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Solution Overview
Problem
Existing display panels face limitations in frame rate enhancement due to RC loading bottlenecks, preventing upgrades beyond the base frame rate, such as from 120 Hz to 144 Hz, and MAFR technology primarily focuses on frame rate reduction and power saving without increasing the maximum frame rate.
Innovation Solution
A display driver circuit operates in a frame rate boost mode by refreshing different areas of the display panel at varying frame rates, including a first area at a first frame rate and a second area at a higher second frame rate, with the clock signal toggling paused for static content areas to accelerate the driving period and maintain safe charging time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the frame rate is increased beyond the base frame rate (e.g., from 120 Hz to 144 Hz), then the dynamic performance is enhanced, but the RC loading bottleneck in the panel prevents the frame rate from being increased
Solution Approach 1:
The display panel is divided into multiple areas (first area and second area) that can be refreshed at different frame rates. The first area is refreshed at the base frame rate while the second area is refreshed at a higher frame rate, allowing different regions to operate at optimal frame rates based on their content requirements.
Solution Approach 2:
The system dynamically adjusts the frame rate for different areas based on content characteristics. Static content areas use the base frame rate to save power, while dynamic content areas use the higher frame rate to improve visual quality, with the clock signal toggling paused for static areas to accelerate the driving period.
2Use of energy by stationary object
If MAFR technology is used to reduce frame rate for power saving, then power consumption is reduced, but the maximum frame rate cannot be upgraded beyond the base frame rate
Solution Approach 1:
Different areas of the display panel are assigned different frame rates based on their specific requirements. Areas displaying static content operate at the base frame rate to minimize power consumption, while areas displaying dynamic content operate at the higher frame rate to maintain visual quality, allowing the system to achieve both power efficiency and high frame rate capability.
Data Source
AI summary
An operating method of a display driver circuit is provided. The display driver is configured to drive a display panel. The display panel has at least a first area and a second area. The operating method includes: in a first mode, refreshing the first area and the second area in a first frame rate; and in a second mode, refreshing the second area in a second frame rate and refreshing the first area in a third frame rate. The second frame rate is higher than the first frame rate and the third frame rate. In addition, a clock signal to drive a plurality of scan lines stops toggling pules corresponding to the first area.