发明名称 |
Wireless display systems, styli, and associated methods |
摘要 |
A wireless coordinate input system for a display system includes a stylus that transmits ultrasonic energy to a plurality of ultrasonic receiving stations in a projection plane. The stylus may include one ultrasonic transmitter used for determination of three-dimensional coordinates of the stylus relative to the projection plane. The stylus may also include a second ultrasonic transmitter controlled by a pressure-activated switch. When the stylus is pressed against the projection plane, the second transmitter turns on and is used for determination of two-dimensional coordinates of the stylus in the projection plane. The stylus may also include a higher frequency burst transmitter used to generate a time reference. One or more of the ultrasonic receiving stations may also include an ultrasonic transmitter for calibration.
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申请公布号 |
US6717073(B2) |
申请公布日期 |
2004.04.06 |
申请号 |
US20000751048 |
申请日期 |
2000.12.29 |
申请人 |
INTEL CORPORATION |
发明人 |
XU JIANPING;HUNT STEPHEN H. |
分类号 |
G06F3/033;G06F3/043;(IPC1-7):G06K11/06;G09G5/00 |
主分类号 |
G06F3/033 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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