18097149. READING DEVICE FOR CAPACITIVE SENSING ELEMENT simplified abstract (INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE)

READING DEVICE FOR CAPACITIVE SENSING ELEMENT

Organization Name

INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE

Inventor(s)

Lu-Pu Liao of Taoyuan City (TW)

Yu-Sheng Lin of Tainan City (TW)

Liang-Ying Liu of Zhubei City (TW)

Chin-Fu Kuo of Tainan City (TW)

READING DEVICE FOR CAPACITIVE SENSING ELEMENT - A simplified explanation of the abstract

This abstract first appeared for US patent application 18097149 titled 'READING DEVICE FOR CAPACITIVE SENSING ELEMENT

The reading device for capacitive sensing elements described in the patent application includes a differential capacitive sensing element, a modulator, a charge-voltage conversion circuit, a phase adjustment circuit, a demodulator, and a low-pass filter.

• The modulator sends a modulation signal to the common node of the capacitive sensing element and modulates its output signal.
• The charge-voltage conversion circuit reads the output charge of the capacitive sensing element and converts it into a voltage signal.
• A demodulation signal is generated by the modulator through the phase adjustment circuit.
• The demodulator receives the demodulation signal and demodulates the output of the charge-to-voltage conversion circuit.
• The low-pass filter is connected to the demodulator's output to filter the demodulated voltage signal and output the read signal.

Potential Applications: - Touchscreen devices - Proximity sensors - Gesture recognition systems

Problems Solved: - Accurate and reliable reading of capacitive sensing elements - Improved signal processing for capacitive touch technology

Benefits: - Enhanced sensitivity and precision in touch and gesture recognition - Efficient and reliable operation of capacitive sensing devices

Commercial Applications: Title: Advanced Capacitive Sensing Technology for Touchscreen Devices This technology can be utilized in smartphones, tablets, interactive kiosks, and other touch-sensitive devices, enhancing user experience and performance in various commercial applications.

Questions about the technology: 1. How does the differential capacitive sensing element improve accuracy in touch recognition? 2. What are the advantages of using a low-pass filter in this reading device?

Original Abstract Submitted

A reading device for capacitive sensing element comprises a differential capacitive sensing element, a modulator, a charge-voltage conversion circuit, a phase adjustment circuit, a demodulator and a low-pass filter. The modulator outputs a modulation signal to the common node of the capacitive sensing element and modulates the output signal of the capacitive sensing element. The two input terminals of the charge-to-voltage conversion circuit are connected to two non-common nodes of the capacitive sensing element. The charge-to-voltage converter read the output charge of the capacitive sensing element and convert it into a voltage signal. The modulator generates a demodulation signal through the phase adjustment circuit. The demodulator receives the demodulation signal from the phase adjustment circuit and demodulates the output of the charge-to-voltage conversion circuit. The low-pass filter is connected to the output of the demodulator for filtering the demodulated voltage signal to output the read signal.