| Summary: | 碩士 === 國立臺北科技大學 === 電腦與通訊研究所 === 100 === Since the capacitive touch concept owns the intuitional interface operations and almost without service-life limitation, its related devices have been widely used in various applications. There are 2 major limitations of the capacitive touch sensor for applications. The sensitivity will be bad under the smaller sensing area and the poor sensing penetration under the design of the thicker mechanical structure. Hence, we propose the shielding strategy of capacitive touch technology for improving the two limitations of the sensing sensitivity and penetration in this study. Based on the same tested conditions, our proposed can improve the sensing sensitivity upto about 235% and the Signal Noise Ratio (SNR) upto about 250% than the original model. Hence, compared with the experiment device with 50 mm2 sensing area and 4 mm thick cover, our proposed approach with same performance can reduce 50 mm2 down to 7 mm2 and 4 mm down to 2 mm. Therefore, our proposed capacitive touch technology can be met the various applications under the limitations of the smaller sensing space and thicker cover conditions. Our design not only can expand the applied range of the markets but also can solve the design limitations.
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