Intelligent Touch Sensing Device with Segmented Electrode Groups
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Solution Overview
Problem
Traditional touch detection schemes face challenges in achieving high resolution touch detection while maintaining high resolution display quality, as they often result in increased scan time and potential moiré effects when trying to integrate touch functionality into display modules.
Innovation Solution
The integration of a high resolution active type sensing structure with a low resolution passive type sensing structure within a touch detection device, utilizing existing control lines, signal lines, transistor switches, and pixel electrodes to perform touch detection procedures, allowing for optional first and second touch detection procedures and enabling fingerprint and pressure data collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a high resolution touch detection function is implemented using traditional touch detection schemes, then touch detection precision is improved, but scan time increases substantially
Solution Approach 1:
The touch detection function is segmented into two independent detection schemes: a first touch detection scheme using a first electrode group for basic touch detection, and a second touch detection scheme using a second electrode group for high-resolution touch detection. This segmentation allows the system to perform low-resolution detection quickly and only activate high-resolution detection when needed, thereby reducing overall scan time while maintaining high measurement precision when required.
Solution Approach 2:
The patent implements partial high-resolution detection by using the second electrode group only for specific detection tasks or regions rather than continuously scanning all detection points at high resolution. This partial action approach reduces the total number of scanning operations, thereby decreasing scan time while still achieving high measurement precision for critical touch events.
2Measurement precision
If a high resolution touch detection function is integrated into display module, then touch detection precision is improved, but display quality deteriorates due to moiré effect
Solution Approach 1:
The patent separates the touch detection electrodes into two distinct groups: the first electrode group integrated with the display structure for basic touch detection, and the second electrode group positioned separately for high-resolution detection. This spatial segmentation prevents the high-resolution electrode pattern from overlapping with pixel electrodes, thereby eliminating the moiré effect while preserving high touch detection precision through the second electrode group.
3Measurement precision
If a high resolution touch detection function is implemented, then touch detection precision is improved, but device complexity increases
Solution Approach 1:
The patent designs the second electrode group to serve multiple functions: it acts as both touch sensing electrodes for high-resolution detection and can function as display electrodes when needed. This multi-functionality reduces the need for separate dedicated high-resolution sensing structures, thereby improving touch detection precision without proportionally increasing device complexity.
Solution Approach 2:
The patent implements dynamic switching between the first and second touch detection schemes based on operational requirements. The system can dynamically activate only the necessary detection scheme, optimizing resource usage and reducing the effective complexity of the system at any given moment while maintaining the capability for high-precision detection when needed.
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 reduces scan time, enhances touch detection efficiency, and maintains high resolution display quality by using a combination of active and passive sensing methods, while also allowing for flexible implementations such as curved or foldable devices.
Implementation Method 1
a first electrode group having a first plurality of first electrodes; a second electrode group having a second plurality of second electrodes
Data Source
AI summary
An intelligent touch sensing device, including: a first electrode group having a first plurality of first electrodes; a second electrode group having a second plurality of second electrodes, each of the second electrodes being coupled with at least one active switch and the second plurality being larger than the first plurality; and a touch detection unit coupled with the first electrode group and with the second electrode group for performing a first touch detection procedure or performing the first detection procedure and then a second touch detection procedure as optionally required by an application program, the first touch detection procedure being acting on the first electrode group, and the second touch detection procedure being acting on at least one region of the second electrode group, wherein the at least one region is determined according to a detection result of the first touch detection procedure.