28.2 A 51dB-SNR 120Hz-Scan-Rate 32×18 Segmented-VCOM LCD In-Cell Touch-Display-Driver IC with 96-Channel Compact Shunt-Sensing Self-Capacitance Analog Front-End

Jang, Hanhwi; Shin, Hyungcheol; Lee, Jaemin; Yoo, Changwon; Chun, Kanghyup; Yun, Ilhyun

doi:10.1109/isscc19947.2020.9062911

Cited by 3 publications

(1 citation statement)

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“…Nowadays, mutual capacitance touch screen panels (TSPs) are widely used in people's daily lives due to the advantages of mutual capacitance screens, such as a high light transmission rate, fast response time, long life, and multiple-touch points support [1,2]. The touch signals recognition algorithm and circuits are two essential parts of the mutual capacitance touch system that determine the touch signal recognition capability.…”

Section: Introductionmentioning

confidence: 99%

A Low-Computing-Complexity Touch Signal Detection Method and Analog Front-End Circuits Based on Cross-Correlation Technology for Large-Size Touch Panel

Guo

Chen

et al. 2022

Sensors

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This paper proposes a low-computing-complexity touch signal detection method and analog front-end (AFE) circuits based on cross-correlation technology for large mutual capacitance touch screen panels (TSPs). To solve the traditional touch signal detection method problem of lots of invalid data being sampled and processed in a large-size TSP, the proposed method only samples and processes the signals around the touch points rather than full-screen data to decrease the computing complexity and analog–digital convertor (ADC) acquisition number. Compared with the traditional method, the proposed touch points search algorithm complexity decreases from MN to M + nN where M, N, and n are the number of RX channels, TX channels, and touch points, respectively. The maximum ADC acquisition number of the proposed method decreases from MN to 18n. Based on the proposed touch signal detection method, the AFE circuits are designed by a 0.11 μm process. The proposed dual cross-correlation AFE achieves detection of the weak touch signal submerged in the large display panel noise. The average channel area and power consumption are decreased to 0.015 mm2 and 0.227 mW, respectively. The maximum frame rate is 384.6 Hz with 10 touch points. The proposed cross-correlation AFE achieves a high frame rate while reducing the die area and power consumption.

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Section: Introductionmentioning

confidence: 99%

A Low-Computing-Complexity Touch Signal Detection Method and Analog Front-End Circuits Based on Cross-Correlation Technology for Large-Size Touch Panel

Guo

Chen

et al. 2022

Sensors

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26.2 Virtual Rotating Gesture Recognizable Touch Readout IC for 1.26” Circular Touch Screen Panel

Lee

Ham

et al. 2023

2023 IEEE International Solid- State Circuits Conference (ISSCC)

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17-aF_rms Resolution Noise-Immune Fingerprint Scanning Analog Front-End for Under-Glass Mutual-Capacitive Fingerprint Sensors

Park

Heo

et al. 2022

IEEE Trans. Circuits Syst. I

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28.2 A 51dB-SNR 120Hz-Scan-Rate 32×18 Segmented-VCOM LCD In-Cell Touch-Display-Driver IC with 96-Channel Compact Shunt-Sensing Self-Capacitance Analog Front-End

Cited by 3 publications

References 4 publications

A Low-Computing-Complexity Touch Signal Detection Method and Analog Front-End Circuits Based on Cross-Correlation Technology for Large-Size Touch Panel

A Low-Computing-Complexity Touch Signal Detection Method and Analog Front-End Circuits Based on Cross-Correlation Technology for Large-Size Touch Panel

26.2 Virtual Rotating Gesture Recognizable Touch Readout IC for 1.26” Circular Touch Screen Panel

17-aF_rms Resolution Noise-Immune Fingerprint Scanning Analog Front-End for Under-Glass Mutual-Capacitive Fingerprint Sensors

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28.2 A 51dB-SNR 120Hz-Scan-Rate 32×18 Segmented-VCOM LCD In-Cell Touch-Display-Driver IC with 96-Channel Compact Shunt-Sensing Self-Capacitance Analog Front-End

Cited by 3 publications

References 4 publications

A Low-Computing-Complexity Touch Signal Detection Method and Analog Front-End Circuits Based on Cross-Correlation Technology for Large-Size Touch Panel

A Low-Computing-Complexity Touch Signal Detection Method and Analog Front-End Circuits Based on Cross-Correlation Technology for Large-Size Touch Panel

26.2 Virtual Rotating Gesture Recognizable Touch Readout IC for 1.26” Circular Touch Screen Panel

17-aFrms Resolution Noise-Immune Fingerprint Scanning Analog Front-End for Under-Glass Mutual-Capacitive Fingerprint Sensors

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Product

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17-aF_rms Resolution Noise-Immune Fingerprint Scanning Analog Front-End for Under-Glass Mutual-Capacitive Fingerprint Sensors