Touch Display Gate Line and Scanning Electrode Timing Offset
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Solution Overview
Problem
Portable electronic devices with touch-sensitive displays face challenges in efficiently managing limited space and reducing noise interference in touch sensing, particularly as devices shrink in size.
Innovation Solution
The method involves exciting gate lines and driving scanning electrodes in a sequence that maintains an offset between areas associated with each gate line and scanning electrode, reducing coupling and interference during touch sensing, and dynamically adjusting the scanning rate to enhance accuracy and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the device size is decreased to improve portability, then the touch-sensitive display area is reduced, but noise interference in touch sensing increases
Solution Approach 1:
The patent divides the touch sensing operation into separate time segments: gate line excitation occurs during one time period while scanning electrode driving occurs during another time period. This temporal segmentation prevents simultaneous operation that causes noise interference, allowing the device to maintain small size while reducing noise in touch sensing.
Solution Approach 2:
The patent implements periodic action by sequentially alternating between gate line excitation and scanning electrode driving in repeated cycles. Each component operates periodically rather than continuously, which reduces electromagnetic interference while maintaining effective touch sensing coverage in the reduced display area.
2Measurement precision
If gate lines and scanning electrodes operate simultaneously to improve touch sensing coverage, then detection accuracy improves, but noise interference increases
Solution Approach 1:
The patent segments the touch sensing process into distinct phases: a first time period dedicated to gate line excitation and a second time period dedicated to scanning electrode driving. This temporal segmentation eliminates simultaneous operation that causes coupling interference, thereby reducing noise while maintaining comprehensive touch detection capability through sequential coverage.
Solution Approach 2:
The patent applies preliminary action by completing gate line excitation before initiating scanning electrode driving. This sequential timing ensures that one component is fully prepared and stabilized before the other operates, preventing electromagnetic coupling interference while maintaining accurate touch detection across the display area.
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 allows for improved touch detection accuracy and reduced noise interference, enabling effective operation in smaller form factors while maintaining efficient touch sensing performance.
Implementation Method 1
exciting a first gate line of a touch-sensitive display to control display of information, driving a first scanning electrode of the touch-sensitive display while exciting the gate line
Data Source
AI summary
A method includes exciting a first gate line of a touch-sensitive display to control display of information, driving a first scanning electrode of the touch-sensitive display while exciting the gate line, wherein the first gate line is associated with a first area of the display and the first scanning electrode is associated with a second area of the display, which second area is spaced from the first area.