Touch Driving Method for Display Panel Partitioning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current touch screen driving technologies experience touch disconnection issues when one hand is placed on the screen and the other hand performs a touch, due to reduced signal scanning in the actual touch area, leading to invalid touch recognition.
Innovation Solution
A touch driving method for a display panel with multiple partitions, where a touch driving signal is applied to only a subset of partitions during touch sub-time periods, allowing for reduced energy absorption by the palm and enhanced signal detection for the real touch finger, thereby increasing the potential difference and sensing signal strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a touch driving signal is applied to all partitions during touch detection, then the touch detection coverage is improved, but the palm absorbs excessive touch signal energy causing touch disconnection
Solution Approach 1:
The display panel is divided into multiple partitions, and the touch driving signal is applied selectively to only N partitions (where N<M) during each touch sub-time period. This segmentation approach reduces the total area exposed to touch signals, thereby reducing the energy absorbed by the palm while maintaining effective touch detection coverage in the active partitions.
Solution Approach 2:
Instead of applying touch driving signals to all partitions, the patent applies signals to only a subset (N partitions) of the total partitions (M partitions). This partial action is sufficient for touch detection while avoiding the excessive signal energy absorption that causes touch disconnection when all partitions are activated.
2Speed
If touch driving signals are applied to multiple partitions simultaneously, then the touch response speed is improved, but the signal scanning amount in actual touch area is reduced causing invalid touch
Solution Approach 1:
The patent employs periodic action by dividing the touch detection into multiple touch sub-time periods within a frame time. In each touch sub-time period, different sets of N partitions are activated sequentially. This periodic activation maintains fast touch response while ensuring that the actual touch area receives adequate signal scanning across different time periods, preventing signal loss.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces touch signal coupling to the human body and enhances the detection of real touch signals, preventing touch disconnection and improving touch accuracy.
Implementation Method 1
When there exists one hand on the touch screen and the other hand performs the actual touch, the amount of signal scanned by the actual touch area will be reduced
Implementation Method 2
increasing the potential difference and sensing signal strength
Data Source
AI summary
The present disclosure provides a touch driving method, a touch module and a display device, relating to the field of display technology. The display panel has M partitions, each partition includes independent touch control units, each touch control unit includes at least one common electrode block connected to each other; the driving method includes: a frame time includes a display time period and a touch time period, the display time period includes at least one display sub-time period, the touch time period includes at least one touch sub-time period; in each display sub-time period, applying a common electrode signal to all common electrode blocks; in each touch sub-time period, applying a touch driving signal to all touch units of N partitions and not applying the touch driving signal to the touch units of the remaining partitions, and sensing sense signals of the touch units of the N partitions.