Infrared touch screen multi-point recognizing method and infrared touch screen
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United States of America Patent
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Jul 19, 2016
Grant Date -
Sep 12, 2013
app pub date -
Oct 20, 2011
filing date -
Nov 26, 2010
priority date (Note) -
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Abstract
Disclosed are an infrared touch screen multipoint recognizing method and an infrared touch screen. The method comprises the following steps: driving infrared transmitting tubes and infrared receiving tubes to scan a touch detection area and saving scan data (601); reading scan data of the infrared transmitting tubes and the infrared receiving tubes, to determine boundaries of quasi-touch points and obtain a quasi-touch point set (602); reading scan data of the infrared transmitting tubes and the infrared receiving tubes aligned with a first direction off-axis, to obtain a first calibrated touch point set (603); reading scan data of the infrared transmitting tubes and the infrared receiving tubes aligned with a second direction off-axis, to obtain a second calibrated touch point set (604); and comparing the quasi-touch point set, the first calibrated touch point set and the second calibrated touch point set, to eliminate ghost points and determine real touch points (605). The infrared touch screen multi-point recognizing method and the infrared touch screen can recognize multiple touch points through one time of full-screen scanning by using only one set of detecting elements.
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