Touch Sensor Parallel Region Scanning for Power Reduction
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Solution Overview
Problem
Existing touch panel technologies face challenges in reducing the thickness of display devices while maintaining detection speed and response to information input, as they require high driving frequencies and high power consumption, limiting the flexibility in detection driving frequency.
Innovation Solution
A contact detecting device with a contact responding section and a contact driving scanning section that scans different regions in parallel, allowing for lower scanning frequencies and improved detection speed without increasing detection driving frequency, using a detecting line group arranged in parallel stripes to identify contact or proximity positions based on voltage change patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-speed scanning of lines is performed to achieve position identification and contact detection, then detection precision and response speed are improved, but power consumption increases and detection driving frequency becomes inflexible
Solution Approach 1:
The detecting surface is divided into multiple regions, and the contact detecting device scans different regions in parallel simultaneously. This segmentation allows the system to cover the entire detecting surface without requiring sequential scanning of all lines, thereby reducing the overall scanning period and power consumption while maintaining detection precision.
Solution Approach 2:
Instead of scanning all lines across the entire detecting surface uniformly, the device performs partial scanning by dividing the surface into regions and scanning only necessary portions in parallel. This partial action approach reduces the total number of scanning operations required, lowering power consumption while achieving sufficient detection coverage.
2Speed
If high driving frequency is used to improve detection speed, then response to information input is improved, but power consumption increases
Solution Approach 1:
The detecting surface is divided into multiple regions that are scanned in parallel. By processing multiple regions simultaneously at a lower frequency rather than scanning all regions sequentially at a high frequency, the system achieves comparable detection speed while significantly reducing power consumption.
Solution Approach 2:
The device uses periodic scanning of different regions in parallel, where each region is scanned at a lower frequency but multiple regions are processed concurrently. This periodic parallel scanning maintains overall detection speed while reducing the peak power consumption compared to continuous high-frequency scanning of the entire surface.
3Adaptability or versatility
If the touch panel is provided on the display panel to enable information input, then functionality is improved, but the thickness of the display module increases
Solution Approach 1:
The contact detecting device is merged with the display panel structure, sharing common components such as the substrate and electrode arrangements. By integrating the touch detection functionality into the existing display panel layers rather than adding a separate touch panel layer, the overall thickness increase is minimized while maintaining full touch input functionality.
Solution Approach 2:
The display panel structure is designed to serve multiple functions: display output and touch input detection. By making the display panel itself capable of detecting contact and proximity, the system eliminates the need for separate dedicated touch panel layers, thereby reducing overall thickness while maintaining versatility.
4Measurement precision
If a large number of wiring pieces are arranged in matrix form to enable position identification, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The detecting surface is divided into multiple regions with fewer wiring pieces per region. By segmenting the detection area and processing regions in parallel, the system achieves high-position identification precision without requiring an enormous number of wiring pieces arranged in a dense matrix, thereby reducing wiring complexity.
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 enhances detection speed and flexibility in determining detection driving frequency, reducing power consumption and improving response to information input while maintaining a thin display module.
Implementation Method 1
a contact detecting device detecting that a user brings a finger, a pen or the like into contact with or proximity to a detecting surface
Data Source
AI summary
A sensor device is provided including sensing section including driving electrodes extending in first direction; driving section configured to apply driving voltage to driving electrodes; sensing lines extending in second direction crossing first direction such that sensing lines intersect driving electrodes; and sensing section configured to detect occurrence of electric change from voltage change in at least one of the sensing lines to identify position of occurrence, wherein driving electrodes include a first drive electrode and a second drive electrode, first voltage is applied to at least one first drive electrode, second voltage is applied to at least one second drive electrode, and sensing section identifies position in which object to be detected is in contact or in proximity on a basis of pattern of voltage change of sensing lines, occurring according to difference in manner of intersecting between sensing lines and driving electrodes.