Touch panel device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 30, 2003
Grant Date -
N/A
app pub date -
Nov 15, 2000
filing date -
Nov 15, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An input pen has an oscillator and a piezoelectric loudspeaker, a frequency/output-level setting circuit for setting a frequency or an output level of a ultrasonic wave oscillated from the oscillator, and a touch sensor for changing a set value of the frequency/output-level setting circuit. A touch panel device comprises microphones for sensing the frequency or the output level of the ultrasonic wave oscillated from the oscillator of the input pen at a touch position on a touch panel by the input pen; a microcomputer for setting attributes of input information in response to the frequency or the output level of the ultrasonic wave sensed by the microphones; and a PDP displaying device for displaying the input information on the flat display device based on the set attributes.
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