Abstract

In tablet touch applications, fast sensing is essential to enhance reporting rate and low power consumption is also essential to prolong battery life. To satisfy both essential demands, a fast and energy efficient single-chip touch controller for medium size (7 to 11.6 inch) of capacitive touch screen panels (TSP) is presented. The presented touch controller is designed with fast sensing methods which are proposed to enhance reporting rate and to reduce power consumption. In this paper, the proposed fast sensing methods are described in detail with their implementation and experimental results. The presented touch controller consumes power of 47.50 mA at 10.1 inch TSP, providing the minimum reporting rate of 129 Hz under 10 simultaneous touches.

© 2013 IEEE

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  1. G. Barrett, R. Omote, "Projected-capacitive touch technology," Inf. Display 26, 16-21 (2010).
  2. S. Kim, W. Choi, W. Rim, Y. Chun, H. Shim, H. Kwon, J. Kim, I. Kee, S. Kim, S. Lee, J. Park, "A highly sensitive capacitive touch sensor integrated on a thin-film-encapsulated active-matrix OLED for ultrathin displays," IEEE Trans. Electron Devices 58, 3609-3615 (2011).
  3. H.-R. Kim, Y.-K. Choi, S.-H. Byun, S.-W. Kim, K.-H. Choi, H.-Y. Ahn, J.-K. Park, D.-Y. Lee, Z.-Y. Wu, H.-D. Kwon, Y.-Y. Choi, C.-J. Lee, H.-H. Cho, J.-S. Yu, M. Lee, "A mobile-display-driver IC embedding a capacitive-touch-screen controller system," Proc. IEEE Int. Solid-State Circuits Conf. (2010) pp. 114-115.
  4. I.-S. Yang, O.-K. Kwon, "A touch controller using differential sensing method for on-cell capacitive touch screen panel systems," IEEE Trans. Consumer Electron. 57, 1027-1032 (2011).
  5. T. Hwang, W. Cui, I. Yang, O. Kwon, "A highly area-efficient controller for capacitive touch screen panel systems," IEEE Trans. Consumer Electron. 56, 1115-1122 (2010).
  6. B. Razavi, Design of Analog CMOS Integrated Circuits (McGraw-Hill, 2001) pp. 100-104.

2011 (2)

S. Kim, W. Choi, W. Rim, Y. Chun, H. Shim, H. Kwon, J. Kim, I. Kee, S. Kim, S. Lee, J. Park, "A highly sensitive capacitive touch sensor integrated on a thin-film-encapsulated active-matrix OLED for ultrathin displays," IEEE Trans. Electron Devices 58, 3609-3615 (2011).

I.-S. Yang, O.-K. Kwon, "A touch controller using differential sensing method for on-cell capacitive touch screen panel systems," IEEE Trans. Consumer Electron. 57, 1027-1032 (2011).

2010 (2)

T. Hwang, W. Cui, I. Yang, O. Kwon, "A highly area-efficient controller for capacitive touch screen panel systems," IEEE Trans. Consumer Electron. 56, 1115-1122 (2010).

G. Barrett, R. Omote, "Projected-capacitive touch technology," Inf. Display 26, 16-21 (2010).

IEEE Trans. Consumer Electron. (2)

I.-S. Yang, O.-K. Kwon, "A touch controller using differential sensing method for on-cell capacitive touch screen panel systems," IEEE Trans. Consumer Electron. 57, 1027-1032 (2011).

T. Hwang, W. Cui, I. Yang, O. Kwon, "A highly area-efficient controller for capacitive touch screen panel systems," IEEE Trans. Consumer Electron. 56, 1115-1122 (2010).

IEEE Trans. Electron Devices (1)

S. Kim, W. Choi, W. Rim, Y. Chun, H. Shim, H. Kwon, J. Kim, I. Kee, S. Kim, S. Lee, J. Park, "A highly sensitive capacitive touch sensor integrated on a thin-film-encapsulated active-matrix OLED for ultrathin displays," IEEE Trans. Electron Devices 58, 3609-3615 (2011).

Inf. Display (1)

G. Barrett, R. Omote, "Projected-capacitive touch technology," Inf. Display 26, 16-21 (2010).

Other (2)

H.-R. Kim, Y.-K. Choi, S.-H. Byun, S.-W. Kim, K.-H. Choi, H.-Y. Ahn, J.-K. Park, D.-Y. Lee, Z.-Y. Wu, H.-D. Kwon, Y.-Y. Choi, C.-J. Lee, H.-H. Cho, J.-S. Yu, M. Lee, "A mobile-display-driver IC embedding a capacitive-touch-screen controller system," Proc. IEEE Int. Solid-State Circuits Conf. (2010) pp. 114-115.

B. Razavi, Design of Analog CMOS Integrated Circuits (McGraw-Hill, 2001) pp. 100-104.

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