发明名称 |
Data input device and method for detecting an off-surface condition by a laser speckle size characteristic |
摘要 |
<p>A data input device for use with a tracking surface having light-scattering properties with respect to the device is disclosed. The device comprises a coherent light source for projecting a coherent light beam onto the tracking surface. The tracking surface scatters the coherent light beam striking the tracking surface. The device further comprises a detector associated with the coherent light source for detecting at least a portion of the scattered light. The detected portion of the scattered light comprising a speckle pattern. The device further comprises a controller configured to respond to the detected speckle pattern and operate the device in one of a tracking mode and a non-tracking mode, depending upon a speckle size characteristic of the detected speckle pattern as determined by the controller.</p> |
申请公布号 |
EP1569081(A2) |
申请公布日期 |
2005.08.31 |
申请号 |
EP20050101077 |
申请日期 |
2005.02.14 |
申请人 |
MICROSOFT CORPORATION |
发明人 |
POPE, JEREMIAH MATTHEW;OLIVER, THOMAS CHARLES |
分类号 |
G01B11/00;G06F3/033;G06F3/038;G06F3/042;(IPC1-7):G06F3/033 |
主分类号 |
G01B11/00 |
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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