OLED Display Refresh Partitioning for Lower Power and Flicker
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Solution Overview
Problem
OLED display screens experience high power consumption during screen updates due to full-screen refresh, which is inefficient and wasteful.
Innovation Solution
A display device with a driving module that controls different refresh frequencies for different display areas based on update status, using GOA modules to provide N-type and P-type scanning signals, and adjusting refresh frequencies for adjacent and non-adjacent pixel groups to minimize power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If full screen is updated during OLED display operation, then display quality is maintained, but driving power consumption becomes high
Solution Approach 1:
The display panel is divided into multiple display areas (first display area, second display area, etc.), each with independent refresh rate control. The driving module selectively refreshes only the updated display area at high frequency while maintaining lower refresh rates for non-updated areas, thereby reducing overall power consumption while preserving display quality where needed.
Solution Approach 2:
Different display areas are assigned different refresh frequencies based on their update status. Updated areas receive high refresh rates to maintain quality, while non-updated areas operate at lower refresh rates to save energy. This local differentiation resolves the contradiction by applying quality maintenance only where necessary.
2Use of energy by moving object
If different refresh frequencies are applied to different display areas, then power consumption is reduced, but display uniformity and flicker prevention become challenging
Solution Approach 1:
The system dynamically adjusts refresh frequencies based on real-time detection of display area updates. The driving module identifies which areas need refreshing and applies appropriate frequencies accordingly, creating a dynamic refresh strategy that balances power savings with display uniformity through adaptive control.
Solution Approach 2:
The driving module detects whether display areas are updated or not, and based on this feedback, determines the appropriate refresh frequency for each area. This feedback mechanism ensures that power consumption is reduced without compromising display uniformity, as the system continuously monitors and adjusts refresh rates based on actual display state.
Data Source
AI summary
A display device and a refresh driving method are provided. The display device includes a display panel and a driving module; where the display panel includes a first display area, a second display area, and a plurality of rows and columns of pixel circuits; and the driving module is configured to control a refresh frequency of the pixel circuits provided in the first display area to be a first refresh frequency, and control a refresh frequency of the pixel circuits provided in the second display area to be different from the first refresh frequency.