TOUCH PANEL DEVICE

PURPOSE: To appropriately detect the simultaneous depression of plural touch keys. CONSTITUTION: The depression of each touch key is detected individually. and the coordinate value in the direction of X and that in the direction of Y of the touch key whose depress has been detected are calculated. C...

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Bibliographic Details
Main Author SASAUCHI MASARU
Format Patent
LanguageEnglish
Published 26.03.1996
Edition6
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:PURPOSE: To appropriately detect the simultaneous depression of plural touch keys. CONSTITUTION: The depression of each touch key is detected individually. and the coordinate value in the direction of X and that in the direction of Y of the touch key whose depress has been detected are calculated. Consequently, the simultaneous depression and areal depression of plural points on a touch panel can precisely be detected. and also. the display dot of a corresponding area in an LCD 16 can be displayed based on the coordinate values of detected plural points. Also, each depression width in the directions of X, Y can be calculated from calculated coordinate values, and wide depression width out of the calculated depression width is compared with a regulated value, and when the former is larger than the latter, the display dot in accordance with each coordinate value is erased. As a result, the display part of the LCD 16 can be erased without providing an erasure key.
Bibliography:Application Number: JP19940219900