Multi-way interactive capacitive touch system with palm rejection of active stylus for 86” touch screen panels

An, Jinyoung; Han, Shuang; Park, Kyeong-Bin; Kim, Ju Eon; Ye, Jae-Hun; Lee, Seung Hwan; Jeong, Jin Wook; Kim, Jung Soo; Baek, Kwang‐Hyun; Chung, Ki-Seok; Hong, Seong‐Kwan

doi:10.1109/isscc.2018.8310244

Cited by 9 publications

(10 citation statements)

References 2 publications

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“…The application of this work is for a 28 × 16 channel capacitive touch panel. The power consumption is lower than those presented in [ 12 , 20 , 21 ]. The chip area is smaller than the reported results [ 12 , 21 , 22 ].…”

Section: Resultsmentioning

confidence: 64%

“…The power consumption is lower than those presented in [ 12 , 20 , 21 ]. The chip area is smaller than the reported results [ 12 , 21 , 22 ]. To obtain a high SNR and scan rate, the OFDM sensing scheme is proposed and the SNR of this chip attains up to 60 dB.…”

Section: Resultsmentioning

confidence: 64%

“…To obtain a high SNR and scan rate, the OFDM sensing scheme is proposed and the SNR of this chip attains up to 60 dB. Contrary to the conventional structure for the touch panel in [ 12 , 20 , 21 , 22 ], the mixer, VGA, and HPF are proposed in the AFE. The AFE of [ 12 , 20 , 21 , 22 ] is composed of integrators, but this paper proposes the mixer and VGA instead of integrators.…”

Section: Resultsmentioning

confidence: 99%

“…Contrary to the conventional structure for the touch panel in [ 12 , 20 , 21 , 22 ], the mixer, VGA, and HPF are proposed in the AFE. The AFE of [ 12 , 20 , 21 , 22 ] is composed of integrators, but this paper proposes the mixer and VGA instead of integrators. Therefore, the touch signal processing time in the AFE is faster and higher than in [ 12 , 20 , 21 , 22 ].…”

Section: Resultsmentioning

confidence: 99%

“…The AFE of [ 12 , 20 , 21 , 22 ] is composed of integrators, but this paper proposes the mixer and VGA instead of integrators. Therefore, the touch signal processing time in the AFE is faster and higher than in [ 12 , 20 , 21 , 22 ]. Therefore, the proposed structure has a SNR of 60 dB and a frame rate of 200 Hz to scan the 28 × 16 channel capacitive touch panel.…”

Section: Resultsmentioning

confidence: 99%

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A High Noise Immunity, 28 × 16-Channel Finger Touch Sensing IC Using OFDM and Frequency Translation Technique

Kim

Rikan

et al. 2018

Sensors

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In this paper, a high noise immunity, 28 × 16-channel finger touch sensing IC for an orthogonal frequency division multiplexing (OFDM) touch sensing scheme is presented. In order to increase the signal-to-noise ratio (SNR), the OFDM sensing scheme is proposed. The transmitter (TX) transmits the orthogonal signal to each channels of the panel. The receiver (RX) detects the magnitude of the orthogonal frequency to be transmitted from the TX. Due to the orthogonal characteristics, it is robust to narrowband interference and noise. Therefore, the SNR can be improved. In order to reduce the noise effect of low frequencies, a mixer and high-pass filter are proposed as well. After the noise is filtered, the touch SNR attained is 60 dB, from 20 dB before the noise is filtered. The advantage of the proposed OFDM sensing scheme is its ability to detect channels of the panel simultaneously with the use of multiple carriers. To satisfy the linearity of the signal in the OFDM system, a high-linearity mixer and a rail-to-rail amplifier in the TX driver are designed. The proposed design is implemented in 90 nm CMOS process. The SNR is approximately 60 dB. The area is 13.6 mm2, and the power consumption is 62.4 mW.

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Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 64%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

A High Noise Immunity, 28 × 16-Channel Finger Touch Sensing IC Using OFDM and Frequency Translation Technique

Kim

Rikan

et al. 2018

Sensors

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P‐126: Surveys on the Stylus Technologies for Capacitive‐Type Touch Systems

An¹,

Jung

2020

Symp Digest of Tech Papers

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In this paper, the surveys on the stylus technologies for capacitive-type touch systems (CTSs) are presented. The stylus technologies are classified into the passive and active stylus depending on the battery integration. To explain two types of the stylus, the architecture of CTS with the stylus is firstly explained. Afterward, the operation principles of the passive, which have a capacitive-type (C-type), an electromagnetic resonance type, and an electrically coupled resonance type, and a C-type active type styli are described.

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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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Multi-way interactive capacitive touch system with palm rejection of active stylus for 86” touch screen panels

Cited by 9 publications

References 2 publications

A High Noise Immunity, 28 × 16-Channel Finger Touch Sensing IC Using OFDM and Frequency Translation Technique

A High Noise Immunity, 28 × 16-Channel Finger Touch Sensing IC Using OFDM and Frequency Translation Technique

P‐126: Surveys on the Stylus Technologies for Capacitive‐Type Touch Systems

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

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