Cordless digital graphics input device
First Claim
Patent Images
1. A photo-optic sensor system for producing positional data relative to the location of a point light source comprising:
- a hand positionable omnidirectional point light source;
an opaque screen having first and second optically transparent slits formed therethrough at spaced-apart location which first and second planes of light may pass;
first and second light guides mounted in the respective paths of said first and second light planes, each having an opaque mask thereon defining a plurality of patterned openings upon which said planes of light impinge;
first and second sensor means coupled to said respective first and second light guides for producing at least a reference output and a positionally proportional output relative to said point light source; and
processing means responsive to said reference and positionally proportional outputs for producing the Cartesian coordinates of said point light source.
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Abstract
A cordless graphics input device system for use with a computer. The device comprises an infrared emitting module useable on any surface adjacent a detector having a pair of patterned concave sensors. Coordinate information is determined via a detector contained microprocessor relative to the sensed analog position data.
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Citations
13 Claims
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1. A photo-optic sensor system for producing positional data relative to the location of a point light source comprising:
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a hand positionable omnidirectional point light source; an opaque screen having first and second optically transparent slits formed therethrough at spaced-apart location which first and second planes of light may pass; first and second light guides mounted in the respective paths of said first and second light planes, each having an opaque mask thereon defining a plurality of patterned openings upon which said planes of light impinge; first and second sensor means coupled to said respective first and second light guides for producing at least a reference output and a positionally proportional output relative to said point light source; and processing means responsive to said reference and positionally proportional outputs for producing the Cartesian coordinates of said point light source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A sensor system for producing positional coordinate data comprising:
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a cordless hand movable light source; a detector module having an opaque screen and at least two parallel and spaced-apart transparent slits formed therein and through which planes of light from said source may pass, sensor means disposed behind said slits for detecting the intensities of the respective light planes relative to a reference and means responsive to each of said detected intensities for determining the angle of incidence of said light planes, whereby the positional coordinates of said light source relative to said detector module are determined.
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Specification