<p>An optical touch panel assembly includes a touch panel that has photosensors and light sources, wherein each light source is energizable to produce a field of illumination that illuminates multiple photosensors at a time. The touch panel also includes control circuitry to energize and de-energize the light sources so that at least one but less than all of the light sources are turned on at a time in a sequence to illuminate an entire active area of the touch panel and to analyze output signals from the photosensors. The control circuitry is further configured to identify a low level output signal corresponding to a proximity event and to determine a location of the proximity event on the touch panel.</p>
申请公布号
WO2010134899(A1)
申请公布日期
2010.11.25
申请号
WO2009US06180
申请日期
2009.11.19
申请人
CHANG, TOM;GRZEGOREK, ANDREW;ZHANG, CHONGMEI;CANFIELD, JOHN
发明人
CHANG, TOM;GRZEGOREK, ANDREW;ZHANG, CHONGMEI;CANFIELD, JOHN