Position measurement systems using position sensitive detectors
First Claim
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1. A remote control device, comprising:
- a plurality of light sources adapted to transmit control signals to a display device, the plurality of light sources comprising a first light source and a second light source;
wherein each of the first light source and the second light source has a light profile that is oriented parallel to a same axis and is oriented in a predetermined angle that is opposite from one another, and the first light source and the second light source are separated from each other by a predetermined distance; and
wherein;
the display device has a controller coupled to a plurality of position sensitive optical detectors, each optical detector generating a pair of electrical signals in response to incident light from the plurality of light sources;
the controller calculates a distance of the remote control device from the display device based on a combination of a magnitude of a separation of light spots on the plurality of position sensitive optical detectors and the predetermined distance by which the first light source and the second light source are separated from each other; and
the controller calculates an angle of at least one of the plurality of light sources based on the predetermined angle at which the first light source and the second light are oriented.
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Abstract
Methods and devices for a remote control device for a display device are disclosed. In one embodiment, the remote control device may comprise a plurality of light sources that each has a light profile angled in a predetermined degree different from other light sources. In another embodiment, the remote control device may comprise a controller; and a plurality of optical detectors coupled to the controller. Each optical detector may generate a pair of electrical signals in response to incident light from a plurality of light sources located on a display device and the controller may calculate the position of the remote control device based on the electrical signals.
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Citations
35 Claims
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1. A remote control device, comprising:
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a plurality of light sources adapted to transmit control signals to a display device, the plurality of light sources comprising a first light source and a second light source; wherein each of the first light source and the second light source has a light profile that is oriented parallel to a same axis and is oriented in a predetermined angle that is opposite from one another, and the first light source and the second light source are separated from each other by a predetermined distance; and wherein; the display device has a controller coupled to a plurality of position sensitive optical detectors, each optical detector generating a pair of electrical signals in response to incident light from the plurality of light sources; the controller calculates a distance of the remote control device from the display device based on a combination of a magnitude of a separation of light spots on the plurality of position sensitive optical detectors and the predetermined distance by which the first light source and the second light source are separated from each other; and the controller calculates an angle of at least one of the plurality of light sources based on the predetermined angle at which the first light source and the second light are oriented. - View Dependent Claims (2, 3, 4, 5, 6, 7, 33)
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8. A device for receiving a command without contact, comprising:
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a plurality of light sources to transmit light from the device, the plurality of light sources comprising a first light source and a second light source, wherein each of the first light source and the second light source has a light profile that is oriented parallel to a same axis and is oriented in a predetermined angle that is opposite from one another, and the first light source and the second light source are separated from each other by a predetermined distance; a plurality of position sensitive light detectors, each receiving light reflected from a movable object in proximity to the device, and each generating electrical signals in response to the reflected light to the device; and a controller communicatively coupled to the plurality of position sensitive light detectors to calculate a position of the movable object based on an angle of the reflected light; wherein the controller calculates a distance of the device from the movable object is calculated based on a magnitude of a separation of light spots on the plurality of position sensitive optical detectors and the predetermined distance by which the first light source and the second light source are separated from each other; and wherein the controller; tracks a movement of the movable object by calculating positions of the movable object consecutively, matches the tracked movement to a predetermined system command, and executes the matched command. - View Dependent Claims (9, 10, 11, 12, 13, 14, 34)
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15. A method to execute a command, comprising:
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transmitting light from a device; receiving at least two light spots reflected from a movable object by a plurality of position sensitive light detectors on the device; generating electrical signals, by the plurality of position sensitive light detectors, in response to the reflected light received; calculating a position and an angle of the movable object based on the electrical signals, wherein the position is determined by the reflected light received by the plurality of position sensitive light detectors, and the angle is determined from a comparison of a ratio of a pair of electrical signals generated at each of the plurality of position sensitive light detectors to the predetermined angle at which the first light source and the second light are oriented; tracking a movement of the movable object by calculating positions of the movable object consecutively; matching the tracked movement to a predetermined system command, and executing the matched command; wherein the light is transmitted from a plurality of light sources of the device, the plurality of light sources comprising a first light source and a second light source, and each of the first light source and the second light source has a light profile that is oriented parallel to a same axis and is oriented in a predetermined angle that is opposite from one another, the first light source and the second light source are separated from each other by a predetermined distance, and the a distance of the device from the movable object is calculated based on a combination of a magnitude of a separation of the at least two light spots on the plurality of position sensitive light detectors and the predetermined distance by which the first light source and the second light source are separated from each other. - View Dependent Claims (16, 17, 18, 19, 20, 21, 35)
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22. A method for controlling a movable device, comprising:
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responsive to receiving light reflected from a plurality of objects, focusing the received light to form at least one light spot on each of a plurality of position sensitive detectors of the movable device, wherein the received light is generated by at least one of a first light source and a second light source, and each of the first light source and the second light source has a light profile that is oriented parallel to a same axis and is oriented in a predetermined angle that is opposite from one another, and the first light source and the second light source are separated from each other by a predetermined distance; measuring the locations of the each of the at least one light spot by; calculating distances to each of the plurality of objects based on a combination of a magnitude of a separation of each of the at least one light spot on each of the plurality of position sensitive optical detectors and the predetermined distance by which the first light source and the second light source are separated from each other; and calculating a position of the movable device based on the distances to each of the plurality of objects and the differential signals; wherein the reflected light forms a line source, and wherein the generated differential electrical signals correspond to a location of the light spots. - View Dependent Claims (30)
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23. A device, comprising:
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a controller; and a position sensitive optical detector coupled to the controller, wherein; the position sensitive optical detector generates a pair of electrical signals in response to incident light from a plurality of light sources, the plurality of light sources comprising a first light source and a second light source, and each of the first light source and the second light source has a light profile that is oriented parallel to a same axis and is oriented in a predetermined angle that is opposite from one another, and the first light source and the second light source are separated from each other by a predetermined distance, and the controller calculates a position of the device with respect to a position of the plurality of light sources based on a combination of a magnitude of separation of light spots on the position sensitive optical detector and the predetermined distance by which the first light source and the second light source are separated from each other, and an angle of the device with respect to angles of the plurality of light sources, the angles being based on a comparison of the electrical signals to the predetermined angle at which the first light source and the second light are oriented. - View Dependent Claims (24, 25, 26, 27, 28, 29, 31, 32)
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Specification