Time-Divided Drive Control for Display Panel Power Reduction
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Solution Overview
Problem
Existing drive control methods for display panels with multiple areas consume excessive power as they continue to process and display black images in areas that do not need to show content, leading to reduced standby time due to constant power usage.
Innovation Solution
Implementing time-divided drive control for pixel and touch scan circuits, allowing independent power supply and operation based on display requirements, where circuits are only active when necessary, reducing power consumption by allocating specific time periods for each display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If full-screen drive control is used for all display areas, then complete area coverage is achieved, but power consumption increases
Solution Approach 1:
The display panel is divided into multiple independent display areas (first display area, second display area, third display area), each with its own pixel scan circuit. This segmentation allows independent control of each area, enabling the system to activate only the necessary areas based on display requirements, thereby reducing overall power consumption while maintaining full area coverage capability when needed.
Solution Approach 2:
The patent implements time-divided drive control where different display areas are activated in different time periods. The pixel scan circuits are controlled to operate periodically based on display requirements, with some areas being active while others remain inactive during specific time frames. This periodic activation pattern reduces average power consumption compared to continuous full-screen operation.
2Reliability
If all pixel scan circuits operate continuously, then complete display refresh is achieved, but standby time decreases
Solution Approach 1:
The system dynamically adjusts the operation state of pixel scan circuits based on real-time display requirements. When certain display areas do not require image display, their corresponding pixel scan circuits are placed in an idle state rather than operating continuously. This dynamic state adjustment maintains display refresh reliability for active areas while extending standby time by reducing overall system power consumption.
Solution Approach 2:
Different pixel scan circuits are assigned different operational qualities based on local display needs. Some pixel scan circuits operate in active mode with full refresh rates, while others enter idle mode with reduced or zero power consumption. This local quality differentiation ensures that display refresh reliability is maintained only where needed, thereby extending overall standby time.
Data Source
AI summary
A drive control method and a related device for a display panel that has different display areas are provided. Time-divided drive control is performed on pixel scan circuits corresponding to the different display areas, so that in a scenario in which some display areas do not need to display an image, a pixel scan circuit may be left idle for some time, to reduce power consumption required by the pixel scan circuits for scanning pixels in this time period. In addition, in the embodiments of this application, time-divided drive control is further performed on touch scan circuits and fingerprint scan circuits corresponding to the different display areas, independent power supplying is further used for pixels in the different display areas, and some functions of a display driver are enabled in a time-divided manner.