Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1998-06-12
2000-07-11
Wu, Xiao
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
345174, G09G 500
Patent
active
060880244
ABSTRACT:
In a resistive-film type touch panel having two resistive-film sheet, a first resistive-film sheet has a power supply means connected to it which generates in it a voltage gradient and the second resistive-film sheet detects a voltage which corresponds to a pressed position on the touch panel. Voltage information corresponding to pressed position coordinate values detected from the two resistive-film sheet is transferred to an A-D conversion means via a switching means for determination of the pressed position on the panel. A non-display region of the panel is provided with function keys, and the panel is additionally provided with a notification means and a non-display region pressing detection means, the notification means making notification of the output from the non-display region pressing detection means, which indicates that the non-display region has been pressed, without intervention of the analog-digital conversion means, directly to a processing/control circuit.
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NEC Corporation
Wu Xiao
LandOfFree
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