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32.3: Simple Single‐Layer Multi‐Touch Projected Capacitive Touch Panel
Author(s) -
Ho TszKin,
Lee ChungYung,
Tseng ManChun,
Kwok HoiSing
Publication year - 2009
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3256812
Subject(s) - capacitive sensing , capacitance , simple (philosophy) , signal (programming language) , computer science , node (physics) , layer (electronics) , point (geometry) , electrical engineering , electronic engineering , materials science , acoustics , engineering , electrode , nanotechnology , physics , philosophy , geometry , mathematics , epistemology , quantum mechanics , programming language
A simple projected capacitive touch panel is developed. This touch panel is capable of detecting multi‐point touch events. The device consists of a single piece of patterned transparent ITO glass and a sensing circuit. The applied driving signal is projected onto the sensing node in the form of an electric field. A charge sensing circuit is used to monitor the mutual capacitance between the driving and sensing nodes. This approach provides a simple and low cost alternative to current capacitive multi‐touch panel design.