APPARATUS FOR PARALLEL READOUT OF TOUCH SCREEN
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United States of America Patent
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Issued Date -
Mar 12, 2015
app pub date -
Sep 4, 2014
filing date -
Sep 10, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A touch screen apparatus is provided, including: a plurality of transmission channels to which a plurality of coded signals are input; a touch screen panel configured to convert the plurality of coded signals to a plurality of sensing currents according to a touch input of a user; an amplifier configured to amplify at least one current among the plurality of sensing currents to generate an output voltage; and a current subtraction circuit configured to generate a second current having an opposite phase to that of a first current among the sensing currents in a node where the touch screen panel is connected with the amplifier, by using an antiphase signal of the coded signal.
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