Display Touch Electrode Driving Method for Power Reduction
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Solution Overview
Problem
Display panels with touch functions experience high power consumption during touch scanning due to the continuous transmission of touch driving signals to multiple touch electrodes.
Innovation Solution
A display driving method that acquires and analyzes the to-be-displayed image to determine if touch electrodes are located in a 'display dark area', and if so, stops providing touch driving signals to those electrodes, reducing unnecessary power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If touch driving signals are continuously transmitted to multiple touch electrodes during touch scanning period, then touch function is maintained, but power consumption increases
Solution Approach 1:
The patent applies local quality by differentiating touch electrode operation based on spatial location. Touch electrodes are categorized into different groups according to their position on the display panel, with those in dark areas having touch driving signals stopped while those in bright areas continue to receive signals. This localized differentiation maintains touch functionality where needed while eliminating unnecessary power consumption in areas where users are unlikely to interact.
2Use of energy by moving object
If touch driving signals are stopped for touch electrodes in display dark area, then power consumption is reduced, but touch sensitivity may be affected
Solution Approach 1:
The patent implements dynamics by making the touch driving signal provision adaptive and changeable based on real-time display content. The system dynamically adjusts which touch electrodes receive driving signals according to the brightness distribution of the displayed image, transitioning from a static all-or-nothing approach to a dynamic, content-aware configuration that optimizes both power consumption and touch sensitivity.
Solution Approach 2:
The patent employs feedback by using display content information (brightness distribution) to control touch driving signal allocation. The system continuously monitors the display image characteristics and uses this feedback to determine which touch electrodes should remain active, creating a closed-loop control system that adapts to varying display conditions and maintains optimal touch sensitivity where needed.
Data Source
AI summary
Provided are a display driving method, a display panel and a display device. The display driving method includes acquiring a to-be-displayed image; the to-be-displayed image is displayed by display pixels, and a vertical projection of each touch electrode on a plane in which the display pixels are located covers a plurality of display pixels; determining whether an area in which touch electrodes are located is in a display dark area according to the to-be-displayed image; and in response to determining that the area in which the touch electrodes are located is in the display dark area, stopping providing a touch driving signal for at least part of the touch electrodes disposed in the display dark area.