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US 2004/0169639 A1Published application
Visible pointer tracking with separately detectable pointer tracking signal
OwnerMichael A. Pate, Jian-gang Wenginventors
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Abstract
The invention concerns pointer tracking using a signal possessing an optical characteristic that is separately detectable from a projected display. An area of the projected display is sensed. Sensing is conducted with filtering for the separately detected optical characteristic.
Claims56
A pointer device, comprising:
- a visible spectrum source to produce visible emissions;
- a non-visible spectrum source to produce emissions outside the visible spectrum;
- optics for outputting, in alignment, said visible emissions and said emissions outside the visible spectrum.
A pointer device, comprising:
- a first visible wavelength source to produce emissions in a first range of wavelengths in the visible spectrum;
- a second wavelength source to produce emission in a second range of wavelengths different than said first range of wavelengths;
- and
- optics to align and output emissions from said first visible wavelength source and said second wavelength source.
1 more element
A method of detecting a pointer signal used with a projected display, the method comprising steps of:
- providing a pointer tracking signal possessing an optical characteristic that is separately detectable from the projected display;
- and
- sensing an area of the projected display while filtering for said optical characteristic.
A method of detecting a pointer signal used with a projected display, the method comprising steps of:
- providing a pointer tracking signal distinguished from the projected display by an optical characteristic unmistakable as an element of the projected display;
- sensing an area of the projected display while filtering for said optical characteristic unmistakable as an element of the projected display.
A pointer device, comprising:
- means for projecting a visible pointer;
- and
- means for projecting, with the visible pointer, a pointer tracking signal that is separately detectable by an image sensor.
Dependencies are inferred from the claim text.