Frequency Selecting Module for Touch System Noise Avoidance
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Solution Overview
Problem
Touch systems in consumer electronic devices are prone to abnormal operation due to noise interference from other circuits, which existing technologies fail to effectively mitigate.
Innovation Solution
A frequency selecting module that includes a storage unit, a spectrum calculating unit, and a selecting unit to transform sensing signals into spectrum data and select an optimal operation frequency that minimizes noise interference by calculating noise levels across multiple frequencies and adjusting the working frequency accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If touch systems operate with multiple circuits simultaneously, then functionality and productivity are improved, but noise interference increases causing abnormal operation
Solution Approach 1:
The system performs preliminary spectrum analysis on sensing signals to identify noise frequencies before touch operations are affected. By pre-detecting the spectral characteristics of background noise from other circuits, the system can select optimal operating frequencies that avoid interference, ensuring stable touch system operation throughout subsequent use.
Solution Approach 2:
The system dynamically changes the operating frequency parameter of the touch sensing channels based on detected noise levels. By adjusting the frequency at which sensing operations occur, the system avoids resonating with or being interfered by fixed-frequency noise from other circuits, thereby maintaining functionality while eliminating harmful interference effects.
2Reliability
If frequency selection is implemented to avoid noise, then reliability is improved, but device complexity increases due to additional processing requirements
Solution Approach 1:
The touch system performs self-diagnosis by analyzing its own sensing signals to detect noise interference. The spectrum analyzing unit processes sensing signals generated during normal operation to identify frequency components, enabling the system to autonomously select optimal operating frequencies without requiring external calibration or complex additional hardware.
Solution Approach 2:
The spectrum analyzing unit serves multiple functions: it characterizes noise from other circuits, identifies optimal operating frequencies, and adapts to different touch sensing channel configurations. This multi-functional approach achieves reliable noise avoidance without proportionally increasing device complexity, as the same processing infrastructure supports multiple operational modes.
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 solution allows touch systems to avoid noise interference, ensuring stable operation by selecting a frequency with the lowest noise level, thus preventing abnormal functioning caused by environmental noise.
Implementation Method 1
a spectrum calculating unit, for transforming the of the at least one of the plurality of sensing signals stored in the storage unit to generate a spectrum data
Data Source
AI summary
A frequency selecting module for a touch system includes a storage unit, for storing a sum of at least one of a plurality of sensing signals of a plurality sensing channels in the touch system; a spectrum calculating unit, for transforming the sum of the at least one of the plurality of sensing signals stored in the storage unit to generate a spectrum data and storing the spectrum data to the storage unit; and a selecting unit, for generating an adjusting signal according to the spectrum data to select one of a plurality of operation frequencies as a working frequency of the plurality of sensing signals.