Array based patterned illumination projector
First Claim
1. A device comprising:
- a die, wherein the die comprises a plurality of light emitting elements that are connected on the die to form a first set of one or more light emitting elements and a second set of two or more light emitting elements; and
an astigmatic optical element, wherein the die is disposed relative to the astigmatic optical element such that the astigmatic optical element projects light emitted from the first and second sets of light emitting elements to produce respective different patterns of illumination from the device within respective ranges of angles of a first range of angles in a first direction relative to the device, and further such that the astigmatic optical element projects light emitted from both of the first and second sets of light emitting elements across all of a second range of angles in a second direction relative to the device, the second direction substantially orthogonal to the first direction, wherein each light emitting element of the second set of two or more light emitting elements emits illumination from the device, via the astigmatic optical element, across a respective range of angles within the first range of angles, and wherein each light emitting element of the second set of two or more light emitting elements emits illumination from the device, via the astigmatic optical element, across the second range of angles.
2 Assignments
0 Petitions
Accused Products
Abstract
A light emitter is provided to emit, into an environment of interest, a plurality of different patterns of light during respective periods of time. Each of the different patterns of light varies according to angle in a first direction such the location of a light detector disposed in the environment can be determined based on illumination from the light emitter that is detected by the light detector over time. The light emitter includes an astigmatic optical element and a die on which are disposed multiple sets of one or more light emitters, each set corresponding to a respective pattern of illumination emitted from the light emitter. Such a configuration of the light emitter can provide means for producing the different patterns of illumination in an energy-efficient, low-cost, and/or size-constrained manner.
19 Citations
20 Claims
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1. A device comprising:
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a die, wherein the die comprises a plurality of light emitting elements that are connected on the die to form a first set of one or more light emitting elements and a second set of two or more light emitting elements; and an astigmatic optical element, wherein the die is disposed relative to the astigmatic optical element such that the astigmatic optical element projects light emitted from the first and second sets of light emitting elements to produce respective different patterns of illumination from the device within respective ranges of angles of a first range of angles in a first direction relative to the device, and further such that the astigmatic optical element projects light emitted from both of the first and second sets of light emitting elements across all of a second range of angles in a second direction relative to the device, the second direction substantially orthogonal to the first direction, wherein each light emitting element of the second set of two or more light emitting elements emits illumination from the device, via the astigmatic optical element, across a respective range of angles within the first range of angles, and wherein each light emitting element of the second set of two or more light emitting elements emits illumination from the device, via the astigmatic optical element, across the second range of angles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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a light emitter, wherein the light emitter comprises; a die, wherein the die comprises a plurality of light emitting elements that are connected on the die to form a first set of one or more light emitting elements and a second set of two or more light emitting elements; and an astigmatic optical element, wherein the die is disposed relative to the astigmatic optical element such that the astigmatic optical element projects light emitted from the first and second sets of light emitting elements to produce respective different patterns of illumination from the light emitter within respective ranges of angles of a first range of angles in a first direction relative to the light emitter, and further such that the astigmatic optical element projects light emitted from both of the first and second sets of light emitting elements across all of a second range of angles in a second direction relative to the light emitter, the second direction substantially orthogonal to the first direction, wherein each light emitting element of the second set of two or more light emitting elements emits illumination from the device, via the astigmatic optical element, across a respective range of angles within the first range of angles, and wherein each light emitting element of the second set of two or more light emitting elements emits illumination from the device, via the astigmatic optical element, across the second range of angles; and a light detector, wherein the light detector is operable to detect illumination emitted from the light emitter. - View Dependent Claims (11, 12, 13, 14)
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15. A method comprising:
providing, from a light emitter, a plurality of different patterns of illumination during respective periods of time, wherein providing each pattern of illumination comprises providing illumination from the light emitter within respective ranges of angles within a first range of angles in a first direction relative to the light emitter, and wherein each provided pattern of illumination illuminates all of a second range of angles in a second direction relative to the light emitter, the second direction substantially orthogonal to the first direction, and wherein the light emitter comprises; a die, wherein the die comprises a plurality of light emitting elements that are connected on the die to form a first set of one or more light emitting elements and a second set of two or more light emitting elements; and an astigmatic optical element, wherein the die is disposed relative to the astigmatic optical element such that the astigmatic optical element projects light emitted from each set of light emitting elements to produce a respective one of the plurality of different patterns of illumination from the light emitter, wherein producing a particular pattern of illumination during a period of time comprises applying power, via interconnects of the die, to one of the sets of light emitting elements, wherein each light emitting element of the second set of two or more light emitting elements emits illumination from the device, via the astigmatic optical element, across a respective range of angles within the first range of angles, and wherein each light emitting element of the second set of two or more light emitting elements emits illumination from the device, via the astigmatic optical element, across the second range of angles. - View Dependent Claims (16, 17, 18, 19, 20)
Specification