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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