Apparatus for controlling the position of a screen pointer based on projection data
AssigneeAvago Technologies ECBU IP Pte Ltd
InventorsStephan Hengstler, Todd Sachs
Life of this patent
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Abstract
An apparatus for controlling the position of a screen pointer includes a light source for illuminating an imaging surface, thereby generating reflected images. The apparatus includes an optical motion sensor for generating one-dimensional projection data based on the reflected images, filtering the projection data, and generating movement data based on the filtered projection data, the movement data indicative of relative motion between the imaging surface and the apparatus.
Claims20
An apparatus for controlling the position of a screen pointer, the apparatus comprising:
- a light source for illuminating an imaging surface, thereby generating reflected images;
- and
- an optical motion sensor for generating one-dimensional projection data based on the reflected images, filtering the projection data, and generating movement data based on the filtered projection data, the movement data indicative of relative motion between the imaging surface and the apparatus.
The apparatus of 9, wherein the elongated photodetectors in the first array have a length to width ratio of at least five to one, and wherein the elongated photodetectors in the second array have a width to length ratio of at least five to one.
A method of generating movement data with an optical pointing device, the method comprising:
- illuminating an imaging surface with an at least partially coherent light source, thereby generating reflected images;
- generating one-dimensional arrays of projection data based on the reflected images;
- filtering the projection data;
- generating movement data based on a correlation of the filtered projection data.
An optical motion sensor for generating movement data to control the position of a screen pointer, the sensor comprising:
- first and second one-dimensional arrays of elongated photodetectors configured to sense reflected images from an imaging surface produced by an at least partially coherent light source;
- an analog to digital converter for generating digital projection data based on outputs of the first and the second arrays;
- and
- a processor for generating movement data based on the digital projection data.
Dependencies are inferred from the claim text.