Abstract

In the design of capacitive touch-screen panels, electrodes are patterned to improve touch sensitivity. In this paper, we analyze the relationship between electrode patterns and touch sensitivity. An approach is presented where simulations are used to measure the sensitivity of touch-screen panels based on capacitance changes for various electrode patterns. Touch sensitivity increases when the touch object is positioned in close proximity to fringing electric fields generated by the patterned electrodes. Three new electrode patterns are proposed to maximize field fringing in order to increase touch sensitivity by purely electrode patterning means. Simulations showed an increased touch sensitivity of up to 5.4%, as compared with the more conventional interlocking diamonds pattern. Here, we also report empirical findings for fabricated touch-screen panels.

© 2014 IEEE

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  2. S. H. Bae, "Integrating multi-touch function with a large-sized LCD," Soc. Inf. Display Symp. Dig. (2008) pp. 178-181.
  3. R. Adler, P. J. Desmares, "An economical touch panel using SAW absorption," IEEE Trans. Ultrason. Ferroelectr. Freq. Control UFFC-34, 195-201 (1987).
  4. G. Barrett, R. Omote, "Projected-capacitive touch technology," J. Soc. Inf. Display 26, 16-21 (2010).
  5. K. Lim, "A fast and energy efficient single-chip touchcontroller for tablet touch applications," J. Display Technol. 9, 520-526 (2013).
  6. I. Baharav, R. Kakarala, "Capacitive touch sensing: signal and image processing algorithms," Proc. SPIE Conf. on Computational Imaging (2011).
  7. T. Hwang, "A highly area-efficient controller for capacitive touch screen panel systems," IEEE Trans. Consum. Electron. 56, 1115-1122 (2010).
  8. Y. H. Tai, "Large-area capacitive active touch panel using the method of pulse overlapping detection," J. Display Technol. 9, 170-175 (2013).
  9. J. Y. Ruan, "A multi-touch interface circuit for a large-sized capacitive touch panel," Proc. IEEE Sensors Conf. (2010) pp. 309-314.
  10. M. Trend et al., Electrode layout for touch screens U.S. Patent 2 011/0 025 639 A1 (2011).
  11. J. A. Harley, Capacitive touch screen or touchpad for finger or stylus U.S. Patent 2010/0 026 655 A1 (2010).
  12. B. L. Mackey, Sensor patterns for a capacitive sensing apparatus Patent Patent 7 129 935 B2 (2004).
  13. B. S. Kim et al., Electrode pattern of touch panel and forming method for the same U.S. Patent 2013/0 155 011 A1 (2013).

2013 (2)

K. Lim, "A fast and energy efficient single-chip touchcontroller for tablet touch applications," J. Display Technol. 9, 520-526 (2013).

Y. H. Tai, "Large-area capacitive active touch panel using the method of pulse overlapping detection," J. Display Technol. 9, 170-175 (2013).

2010 (2)

T. Hwang, "A highly area-efficient controller for capacitive touch screen panel systems," IEEE Trans. Consum. Electron. 56, 1115-1122 (2010).

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

1987 (1)

R. Adler, P. J. Desmares, "An economical touch panel using SAW absorption," IEEE Trans. Ultrason. Ferroelectr. Freq. Control UFFC-34, 195-201 (1987).

IEEE Trans. Consum. Electron. (1)

T. Hwang, "A highly area-efficient controller for capacitive touch screen panel systems," IEEE Trans. Consum. Electron. 56, 1115-1122 (2010).

IEEE Trans. Ultrason. Ferroelectr. Freq. Control (1)

R. Adler, P. J. Desmares, "An economical touch panel using SAW absorption," IEEE Trans. Ultrason. Ferroelectr. Freq. Control UFFC-34, 195-201 (1987).

J. Display Technol. (1)

K. Lim, "A fast and energy efficient single-chip touchcontroller for tablet touch applications," J. Display Technol. 9, 520-526 (2013).

J. Display Technol. (1)

J. Soc. Inf. Display (1)

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

Other (8)

S. P. Hotelling, B. R. Land, Double-sided touch-sensitive panel with shield and drive combined layer U.S. Patent 7 920 129 B2 (2011).

S. H. Bae, "Integrating multi-touch function with a large-sized LCD," Soc. Inf. Display Symp. Dig. (2008) pp. 178-181.

J. Y. Ruan, "A multi-touch interface circuit for a large-sized capacitive touch panel," Proc. IEEE Sensors Conf. (2010) pp. 309-314.

M. Trend et al., Electrode layout for touch screens U.S. Patent 2 011/0 025 639 A1 (2011).

J. A. Harley, Capacitive touch screen or touchpad for finger or stylus U.S. Patent 2010/0 026 655 A1 (2010).

B. L. Mackey, Sensor patterns for a capacitive sensing apparatus Patent Patent 7 129 935 B2 (2004).

B. S. Kim et al., Electrode pattern of touch panel and forming method for the same U.S. Patent 2013/0 155 011 A1 (2013).

I. Baharav, R. Kakarala, "Capacitive touch sensing: signal and image processing algorithms," Proc. SPIE Conf. on Computational Imaging (2011).

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