DATA INPUT DEVICE
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Accused Products
Abstract
A data input device and method including an illuminator operative to illuminate at least one engagement plane by directing light along the at least one engagement plane, a two-dimensional imaging sensor viewing the at least one engagement plane from a location outside the at least one engagement plane for sensing light from the illuminator scattered by engagement of a data entry object with the at least one engagement plane and data entry processor receiving an output from the two-dimensional imaging sensor and providing a data entry input to utilization circuitry.
77 Citations
252 Claims
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1-192. -192. (canceled)
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193. A data input device comprising:
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an illuminator operative to illuminate at least one engagement surface;
a two-dimensional imaging sensor viewing said at least one engagement surface from a location outside said at least one engagement surface for sensing engagement of a data entry object with said at least one engagement surface; and
a data entry processor receiving an output from said two-dimensional imaging sensor and providing a data entry input to utilization circuitry, said data entry processor employing shadow analysis. - View Dependent Claims (194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222)
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223. A data input method comprising:
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illuminating at least one engagement surface;
viewing said at least one engagement surface with a two-dimensional image sensor form a location outside said at least one engagement surface for sensing engagement of a data entry object with said at least one engagement surface; and
processing an output from said two-dimensional imaging sensor and providing a data entry input to utilization circuitry, said data entry processor employing shadow analysis. - View Dependent Claims (224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252)
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Specification