Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
July 27, 2010
Patent Application Number
12123609
Date Filed
May 20, 2008
Patent Primary Examiner
Patent abstract
The present invention discloses a capacitive button device, comprising: a signal input unit, a first amplifier, a first switching unit, a second amplifier, a second switching unit, an analog-to-digital converting unit, a third switching unit, a data output unit, a data storage unit and a digital-to-analog converting unit. Thereby, the present invention overcomes the problem due to poor resolution of conventional capacitive buttons and can be used with touch panels. Moreover, the digital-to-analog converting unit is downsized with improved resolution and reduced cost in design and fabrication.
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