Touch Sensor Electrode Layout With Coordinate Compensation
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Solution Overview
Problem
Existing electronic devices face challenges in improving sensing reliability, particularly in accurately detecting inputs such as touch and pen-based interactions, due to limitations in sensor layer design and coordination compensation.
Innovation Solution
The electronic device incorporates a sensor layer with alternating first and second electrodes, interconnected by lines that compensate for coordinate differences based on sensing signals, utilizing a differential amplifier and a sensor driving unit to enhance sensing accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sensor layer with simple electrode arrangement is used, then the device structure remains simple, but sensing reliability and accuracy deteriorate due to interference and noise
Solution Approach 1:
The first electrode is divided into multiple first sub-electrodes arranged in a specific pattern. This segmentation allows for better signal differentiation and noise reduction, improving sensing reliability while maintaining a manageable structural complexity through systematic arrangement.
Solution Approach 2:
Different regions of the sensor layer are assigned different functions: the first area uses the third line for sensing, the second area uses the fourth line for sensing, and the boundary region between areas is specifically designed to reduce interference. This local differentiation improves overall sensing reliability without requiring complete redesign of the entire sensor structure.
2Measurement precision
If coordinate compensation based on signal difference is implemented, then measurement precision improves, but device complexity increases due to additional processing requirements
Solution Approach 1:
The sensor layer is pre-configured with specifically arranged lines and electrodes (third line in first area, fourth line in second area) that are positioned to naturally capture differential signals. This preliminary structural arrangement enables coordinate compensation to be achieved through relatively simple signal subtraction, reducing the complexity of subsequent processing while maintaining high measurement precision.
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 design enhances sensing reliability by improving the detection of touch and pen inputs, reducing noise, and increasing the number of signal channels, thereby providing more precise coordinate calculations.
Implementation Method 1
a sensor layer on the display layer and in which an active area is defined... a plurality of first electrodes... a plurality of second electrodes... a first line electrically connected to the plurality of first sub-electrodes... a second line electrically connected to the plurality of second sub-electrodes
Data Source
AI summary
An electronic device includes a display layer, a sensor layer in which an active area is defined, and a sensor driving unit, wherein the active area is defined as a first area and a second area, the sensor layer includes a plurality of first electrodes, each of which includes a plurality of first sub-electrodes and a plurality of second sub-electrodes arranged alternately in the first direction, a plurality of second electrodes, a first line, a second line, a third line connected to one of the plurality of first sub-electrodes and in the first area, and a fourth line connected to one of the plurality of second sub-electrodes and in the second area, and the senor driving unit is configured to compensate for coordinates based on a difference between a first sensing signal sensed in the third line and a second sensing signal sensed in the fourth line.