Touch detection device, electronic device and recording medium
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United States of America Patent
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Aug 12, 2014
Grant Date -
Apr 28, 2011
app pub date -
Oct 22, 2010
filing date -
Oct 22, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A touch position calculation unit 113 calculating the touch position based on detected intensities at a touch panel unit 150 compares the detected intensities with a threshold to determine whether the touch is valid. Here, since display noise caused by the display screen of a display unit 132 affects the touch detection, the touch position calculation unit 113 acquires the display state of the display unit 132 from a display control unit 112. The touch position calculation unit 113 makes reference to a condition list stored in a memory 160 and sets up a threshold corresponding to the display state as the touch detection condition. Information indicating the display state includes the screen design typified by coloration patterns and the total gradation value corresponding to the voltage applied to the screen.
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