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Optics Letters

Optics Letters


  • Vol. 36, Iss. 6 — Mar. 15, 2011
  • pp: 894–896

Optical panel with full multitouch using patterned indium tin oxide

Wen-Yang Chang, Heng-Ju Lin, and Jin-Sheng Chang  »View Author Affiliations

Optics Letters, Vol. 36, Issue 6, pp. 894-896 (2011)

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This study proposes an optical panel with full multitouch using the patterned indium tin oxide (ITO) and an algorithm matrix to avoid ghost points. The patterned ITOs include the virtual high and low impedances. The algorithm matrix with two configurations of equivalent circuits for array scanning is derived using the voltage divider rule. The fabrication process of the multitouch panel is carried out using microelectromechanical systems technology. The optical characteristics of the multitouch panel in the UV, visible, and IR regions are measured using photometric analysis. The multitouch panel, containing sensing pixels of 30 × 30 arrays, has a pixel size of 2 × 2 mm 2 and a pitch distance of 2 mm . The average values of high and low impedances are 53.23 and 9.3 k Ω , respectively. The maximum transmittance is about 74.2% at the wavelength of 692 nm . The multitouch panel based on high and low impedance patterns has been specifically designed to offer good adjacent touch resolution and sensitivity for reality multitouch applications. In addition, the patterned design and the algorithm matrix provide unlimited multitouch points and avoid ghost points.

© 2011 Optical Society of America

OCIS Codes
(120.2040) Instrumentation, measurement, and metrology : Displays
(230.0230) Optical devices : Optical devices

ToC Category:
Optical Design and Fabrication

Original Manuscript: November 8, 2010
Revised Manuscript: February 7, 2011
Manuscript Accepted: February 9, 2011
Published: March 9, 2011

Wen-Yang Chang, Heng-Ju Lin, and Jin-Sheng Chang, "Optical panel with full multitouch using patterned indium tin oxide," Opt. Lett. 36, 894-896 (2011)

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