Input Sensor Frequency Control for Interference-Resistant Detection
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Solution Overview
Problem
Existing input sensors in electronic devices struggle to accurately detect user inputs, particularly in complex environments with varying signal strengths and interference.
Innovation Solution
An input sensor system comprising first and second electrodes, a sensor driver with switching circuits and receivers, and a sensor controller that adjusts transmission signal frequencies based on reception signals from these electrodes to enhance detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If fixed frequency transmission signals are used in existing input sensors, then the device complexity is low, but the detection accuracy deteriorates in complex environments with varying signal strengths and interference
Solution Approach 1:
The patent applies dynamics by making the transmission signal frequency adjustable rather than fixed. The sensor driver dynamically changes the frequency of transmission signals based on reception signals received from electrodes, allowing the system to adapt to varying signal strengths and interference conditions in real-time, thereby improving detection accuracy in complex environments
Solution Approach 2:
The patent implements feedback by using reception signals from the electrodes to control the frequency adjustment of transmission signals. The sensor driver receives signals from multiple electrodes, processes these reception signals, and uses them to adjust the transmission frequency, creating a closed-loop system that continuously optimizes detection performance based on actual sensor performance
2Measurement precision
If multiple electrodes are used to improve detection accuracy, then the measurement precision improves, but the device complexity and signal processing requirements increase
Solution Approach 1:
The patent merges multiple electrode signals into a unified frequency adjustment mechanism. Instead of processing each electrode signal independently through separate complex circuits, the sensor driver combines reception signals from multiple electrodes and uses them collectively to adjust the transmission frequency, reducing overall system complexity while maintaining the benefits of multi-electrode detection
Solution Approach 2:
The patent changes the operating parameter (frequency) of the transmission signals based on the collective information from multiple electrodes. By adjusting the frequency parameter dynamically according to reception signals from multiple electrodes, the system achieves improved detection accuracy without requiring complex independent processing circuits for each electrode
Data Source
AI summary
Disclosed is an input sensor of an electronic device including a sensor layer including first electrodes and second electrodes, and a sensor driver electrically connected to the second electrodes, and configured to provide transmission signals to the first electrodes, output a first reception signal based on sensing signals received from ones of the second electrodes of a first location, which are adjacent to each other, output a second reception signal based on one of the sensing signals received from one of the ones of the second electrodes of the first location, and another sensing signal received from another one of the second electrodes of a second location, and change a frequency of the transmission signals based on the first reception signal and the second reception signal.