Touch Panel Anti-Interference via Low-Noise Interval Calculation
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Solution Overview
Problem
Existing anti-interference methods for touch panels fail to accurately select an operating frequency with the lowest noise, as they can only choose from preset frequencies or bands, which may not necessarily minimize common mode noise interference.
Innovation Solution
An anti-interference method and apparatus that calculate a low-noise interval using the operating frequency and jitter frequency of a charging adapter, allowing the touch panel to switch to a frequency within this interval when interference exceeds a preset range, thereby improving frequency switching accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the touch panel selects an operating frequency from preset frequencies or preset operating band, then the frequency selection process is simple, but the accuracy of frequency selection is insufficient and cannot guarantee the lowest noise
Solution Approach 1:
The patent performs preliminary calculation of the low-noise interval before frequency selection. By calculating the interval based on the charging adapter's operating frequency and jitter frequency in advance, the system establishes a targeted frequency range that guarantees the lowest noise, avoiding the need to search through all preset frequencies and improving selection accuracy.
Solution Approach 2:
The patent changes the approach from selecting from discrete preset frequencies to calculating a continuous low-noise interval based on the charging adapter's parameters (operating frequency and jitter frequency). This parameter-based calculation method dynamically determines the optimal frequency range, significantly improving frequency selection accuracy while maintaining reasonable system complexity.
2Reliability
If the touch panel uses a fixed operating frequency, then the system operation is stable, but the anti-interference capability is insufficient when common mode noise exceeds threshold
Solution Approach 1:
The patent implements a feedback mechanism where the system continuously monitors the common mode noise level. When the noise exceeds a preset threshold, the system automatically triggers frequency switching by calculating a new low-noise interval based on the charging adapter's current operating parameters. This feedback loop enhances anti-interference capability while maintaining operational simplicity through automated decision-making.
Solution Approach 2:
The patent transitions from a static fixed frequency approach to a dynamic frequency adjustment mechanism. The system adapts its operating frequency based on real-time noise conditions and charging adapter parameters, calculating the low-noise interval dynamically. This dynamic approach significantly improves anti-interference capability while the automated calculation process keeps the implementation complexity manageable.
Data Source
AI summary
An anti-interference method and apparatus for a touch panel relate to the communications field and improve accuracy of switching an operating frequency by the touch panel. The anti-interference method for the touch panel includes obtaining an operating frequency of a charging adapter and a jitter frequency of the charging adapter, and calculating, using a preset algorithm based on the operating frequency and the jitter frequency, a low-noise interval in which the touch panel is to operate such that the touch panel obtains the low-noise interval, and switches an operating frequency of the touch panel to a frequency in the low-noise interval when interference to the touch panel exceeds a preset range. The low-noise interval is a frequency interval in which the touch panel is to operate when the interference to the touch panel is within the preset range.