Apparatus for controlling a screen pointer with a frame rate based on velocity
DCFirst Claim
1. An apparatus for controlling the position of a screen pointer for an electronic device having a display screen, the apparatus comprising:
- a light source for illuminating an imaging surface, thereby generating reflected images; and
an optical motion sensor for generating digital images from the reflected images at a first frame rate, the motion sensor configured to generate movement data for controlling the position of a screen pointer based on the digital images, the movement data indicative of relative motion between the imaging surface and the apparatus, the motion sensor configured to modify the first frame rate to one of a plurality of alternate frame rates based on a current relative velocity between the imaging surface and the apparatus.
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Abstract
An apparatus for controlling the position of a screen pointer for an electronic device having a display screen includes a light source for illuminating an imaging surface, thereby generating reflected images. An optical motion sensor generates digital images from the reflected images at a first frame rate. The motion sensor is configured to generate movement data based on the digital images. The movement data is indicative of relative motion between the imaging surface and the apparatus. The motion sensor is configured to modify the first frame rate to one of a plurality of alternate frame rates based on a current relative velocity between the imaging surface and the apparatus.
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Citations
25 Claims
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1. An apparatus for controlling the position of a screen pointer for an electronic device having a display screen, the apparatus comprising:
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a light source for illuminating an imaging surface, thereby generating reflected images; and an optical motion sensor for generating digital images from the reflected images at a first frame rate, the motion sensor configured to generate movement data for controlling the position of a screen pointer based on the digital images, the movement data indicative of relative motion between the imaging surface and the apparatus, the motion sensor configured to modify the first frame rate to one of a plurality of alternate frame rates based on a current relative velocity between the imaging surface and the apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for generating movement data for controlling the position of a screen pointer for an electronic device having a display screen, the method comprising:
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directing light from a light source onto an imaging surface, thereby generating reflected images; focusing the reflected images onto an array of photo detectors; digitizing output signals of the photo detectors, thereby generating digital representations of the reflected images; correlating the digital representations to generate motion data indicative of relative motion between the imaging surface and the array of photo detectors for controlling a position of a screen pointer; and adjusting the rate at which the digital representations are generated based on a current relative non-zero velocity between the imaging surface and the array of photo detectors. - View Dependent Claims (15, 16, 17, 18, 19)
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20. An optical pointing device for generating movement data for controlling the position of a screen pointer, the optical pointing device including a low power mode and a full power mode, the apparatus comprising:
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a light source for illuminating an imaging surface, thereby generating reflected images; a photo detector array for generating image data based on the reflected images; a controller for capturing the image data at a first capture rate, generating digital images based on the captured image data, generating movement data based on the digital images, the movement data indicative of relative motion between the imaging surface and the optical pointing device, the controller configured to cause the device to enter the low power mode after a period of inactivity, and wherein the controller is configured to generate digital images with a lesser number of pixels in the low power mode than the full power mode. - View Dependent Claims (21)
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22. An apparatus for controlling the position of a screen pointer for an electronic device having a display screen, the apparatus comprising:
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a light source for illuminating an imaging surface, thereby generating reflected images; and an optical motion sensor for generating a plurality of pairs of digital images from the reflected images with an intra-pair time delay between the generation of the individual digital images in each pair, and with an inter-pair time delay between the generation of each pair, wherein the inter-pair time delay is greater than the intra-pair time delay, the motion sensor configured to generate movement data based on the digital images, the movement data indicative of relative motion between the imaging surface and the apparatus. - View Dependent Claims (23, 24, 25)
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Specification