Abstract
In this paper, we propose a novel active touch panel circuit using the RC time
constant changes when the panel is touched to induce pulse overlapping. The transient ON
current of the pixel thin-film transistor (TFT) is to be detected for the judgment
whether panel is touched or not. The proposed circuit has many advantages, such as
simple structure, multi-touch, low operating power, as well as significant current to be
read out easily by low cost ICs. Especially, it provides excellent stability since the
circuit is hardly influenced by variation of TFTs. Discrete TFTs are used to build the
proposed circuit to verify its function and the function is further demonstrated in a
2-inch 9×9 array. The potential for large area applications is proven by
simulating a 42-inch touch panel with proper assumptions.
© 2013 IEEE
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription