METHOD AND APPARATUS FOR GENERATING DRIVER SIGNALS OF SAW TOUCH PANEL
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United States of America Patent
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Issued Date -
Dec 30, 2010
app pub date -
Jun 26, 2009
filing date -
Jun 26, 2009
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a method and apparatus for generating driver signals of SAW touch panel. The method includes the steps of: sending a trigger signal continuously by referring to an input signal, wherein the trigger signal is sent when the input signal is within a predetermined range; generating a surface acoustic wave according to the trigger signal; transmitting the surface acoustic wave to at least one transducer via a touch surface; and detecting the input signal via at least one transducer. Moreover, the input signal is kept on a predetermined level when the surface acoustic wave has not been received by the transducer and when a noise signal from circuits outside the transducer has not been added in the input signal. The predetermined level is within the predetermined range. The sensing accuracy of the SAW touch panel can be enhanced because the noise signal has less effect on the driver signals.
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