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Instrument Detection with an Optical Touch Sensitive Device, with Associating Contacts with Active Instruments
Instrument Detection with an Optical Touch Sensitive Device, with Associating Contacts with Active Instruments
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机译:光学触摸感应设备进行仪器检测,并与有源仪器建立联系
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摘要
An optical touch-sensitive device detects touch events caused by instruments (e.g., pens, styluses) and distinguishes these events from touch events caused by fingers. In some embodiments, different instruments can also be distinguished. The optical touch-sensitive device includes multiple emitters and detectors. Each emitter produces optical beams which are received by the detectors. The optical beams preferably are multiplexed in a manner so that many optical beams can be received by a detector simultaneously. Touch events disturb the optical beams, for example due to frustrated total internal reflection. Information indicating which optical beams have been disturbed is analyzed to detect one or more touch events. The analysis also distinguishes instrument touch events from finger touch events.
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