研究目的
Reducing common-mode noise and global multivalued offset in touch screen systems to improve signal-to-noise ratio (SNR) and reduce power consumption.
研究成果
The CDS algorithm effectively reduces common-mode noise and global multivalued offsets in touchscreen systems, achieving a significant SNR enhancement of 7.6 dB. Despite introducing higher frequency noise, this can be filtered to not overlap with touch signal frequencies, improving detection accuracy and reducing power consumption.
研究不足
The technique introduces higher frequency noise within a certain bandwidth, which may require additional filtering. The correlation of low-frequency noise between adjacent frames weakens at low sampling frequencies.
1：Experimental Design and Method Selection:
The study applies the correlated double sampling (CDS) algorithm to touch signals treated as images for noise and offset reduction.
2：Sample Selection and Data Sources:
Experiments were conducted on an unspecified size touchscreen panel with parameters detailed in the paper.
3：List of Experimental Equipment and Materials:
The system operates at 10 V with a refresh rate of 60 Hz.
4：Experimental Procedures and Operational Workflow:
The CDS algorithm involves scanning the panel, applying the algorithm to reduce noise and offset, and updating the noise reference frame.
5：Data Analysis Methods:
The effect of CDS is analyzed through normalized output PSD plots and SNR measurements.
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