An analysis of electrode patterns in capacitive touch screen panels

Jeffrey Lee, Matthew T. Cole, Jackson Chi Sun Lai, Arokia Nathan

Research output: Contribution to journalArticle

41 Citations (Scopus)

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.

Original languageEnglish
Article number6732882
Pages (from-to)362-366
Number of pages5
JournalIEEE/OSA Journal of Display Technology
Volume10
Issue number5
DOIs
Publication statusPublished - May 2014

Keywords

  • Electrode patterns
  • projected capacitive touch screen panel

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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