Alternating panel charge sharing technique for touch screen panel self‐capacitance sensing IC

Seong, Siheon; Lee, Sungbae; Bae, Seung-Hwan; Lee, M.

doi:10.1049/el.2020.1425

Cited by 4 publications

(1 citation statement)

References 4 publications

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“…The third challenge is the tradeoff of the high frame rate and small die area for the large-size TSP. There are three main driving methods for mutual capacitive TSP, including the serial driving method, parallel coded driving method, and parallel multi-frequency driving method [14][15][16][17][18][19][20][21][22][23][24][25][26]. The number of electrodes increases with the increase in the mutual capacitance TSP size [27,28].…”

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.

show abstract

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

View full text Add to dashboard Cite

show abstract

4.5: A Low Power Consumption Display Solution Based on The Charge Sharing Technology

Sun

Hao

et al. 2021

Symp Digest of Tech Papers

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With the development of display technology, low power consumption of display device is popular. To drive the display panel in the unit, each sub‐pixel in the panel needs to be charged. The more amount of charge for each sub‐pixel, the greater power consumption is needed for the display panel to display images. This paper provides a method to drive the display panel, which can reduce each sub‐pixel's total charge amount in the display panel. In this way, it can reduce the power consumption needed for driving the panel to display images.

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A 3.58 nJ/Node Dual Cross Correlation Analog-Front-End Circuit With ADC for Mutual Capacitive Panel

Guo

Chen

2024

IEEE J. Solid-State Circuits

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Alternating panel charge sharing technique for touch screen panel self‐capacitance sensing IC

Cited by 4 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

4.5: A Low Power Consumption Display Solution Based on The Charge Sharing Technology

A 3.58 nJ/Node Dual Cross Correlation Analog-Front-End Circuit With ADC for Mutual Capacitive Panel

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