Resonant modulation for low power range imaging cameras
First Claim
1. An amplitude modulated continuous wave range imaging device, comprising:
- a signaling device configured to emit an intensity modulated illumination signal;
an image sensor configured to capture a plurality of images of a reflection of the modulated illumination signal, wherein the captured images include intensity and/or phase components for a plurality of pixels of the image sensor, wherein each pixel includes a first modulation terminal having a first capacitive component;
a first driver configured to charge a first set of modulation terminals of the plurality of pixels;
a second driver configured to charge a second set of modulation terminals of the plurality of pixels, wherein the first set and the second set are mutually exclusive;
a charge transfer circuit connected between the first set of modulation terminals and the second set of modulation terminals, wherein the charge transfer circuit is configured to transfer charge between the first set of modulation terminals and the second set of modulation terminals; and
a processor configured to determine a phase shift between the emitted modulated illumination signal and the captured images at each of the plurality pixels.
3 Assignments
0 Petitions
Accused Products
Abstract
An amplitude modulated continuous wave range imaging device has a signaling device configured to emit an intensity modulated illumination signal. An image sensor is configured to capture a plurality of images of a reflection of the modulated illumination signal. The captured images include intensity and/or phase components for a plurality of pixels of the image sensor. Each pixel includes a first modulation terminal having a first capacitive component. A first driver is configured to charge a first set of modulation terminals of the plurality of pixels. A second driver is configured to charge a second set of modulation terminals of the plurality of pixels. A charge transfer circuit is connected between the first set of modulation terminals and the second set of modulation terminals. The charge transfer circuit is configured to transfer charge between the first set of modulation terminals and the second set of modulation terminals.
8 Citations
26 Claims
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1. An amplitude modulated continuous wave range imaging device, comprising:
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a signaling device configured to emit an intensity modulated illumination signal; an image sensor configured to capture a plurality of images of a reflection of the modulated illumination signal, wherein the captured images include intensity and/or phase components for a plurality of pixels of the image sensor, wherein each pixel includes a first modulation terminal having a first capacitive component; a first driver configured to charge a first set of modulation terminals of the plurality of pixels;
a second driver configured to charge a second set of modulation terminals of the plurality of pixels, wherein the first set and the second set are mutually exclusive;a charge transfer circuit connected between the first set of modulation terminals and the second set of modulation terminals, wherein the charge transfer circuit is configured to transfer charge between the first set of modulation terminals and the second set of modulation terminals; and a processor configured to determine a phase shift between the emitted modulated illumination signal and the captured images at each of the plurality pixels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An amplitude modulated continuous wave range imaging device, comprising:
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a signaling device configured to emit an intensity modulated illumination signal; an image sensor configured to capture a plurality of images of a reflection of the modulated illumination signal, wherein the captured images include intensity and/or phase components for at least one pixel of the image sensor, wherein the at least one pixel includes a first modulation terminal having a first capacitive component and a second modulation terminal having a second capacitive component; a first driver configured to charge the first modulation terminal; a second driver configured to charge the second modulation terminal; a charge transfer circuit connected between the first modulation terminal and the second modulation terminal, wherein the charge transfer circuit is configured to transfer charge between the first modulation terminal and the second modulation terminal; and a processor configured determine a phase shift between the emitted illumination modulation signal and the captured images at the at least one pixel.
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13. A method of amplitude modulated continuous wave range imaging, the method comprising:
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emitting a modulated illumination signal; receiving reflections of the modulated illumination signal on an image sensor; capturing a plurality of images of the reflections on the image sensor, wherein the images include an intensity component and a phase component for a plurality of pixels of the image sensor, and wherein each pixel includes a first modulation terminal having a first capacitive component; charging a first set of modulation terminals of the plurality of pixels; charging a second set of modulation terminals of the plurality of pixels using some of the charge from the first set of modulation terminals of the pixels, wherein the first set and the second set are mutually exclusive; and determining a phase shift between the modulated illumination signal and the captured images at each of the plurality of pixels. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A non-transitory computer-readable medium encoded with a computer program code for amplitude modulated continuous wave range imaging, the program code comprising instructions for:
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causing a modulated illumination signal to be emitted; causing an image sensor to capture a plurality of images of reflections of the modulated illumination signal, wherein the images include an intensity component and/or a phase component for a plurality of pixels of the image sensor, and wherein each pixel includes a first modulation terminal having a first capacitive component; causing a first driver to charge a first set of modulation terminals; causing a second driver to charge a second set of modulation terminals, wherein the second set of modulation terminals are also charged by some of the charge from the first set of modulation terminals; and determining a phase shift between the modulated illumination signal and the captured images at each of the plurality of pixels. - View Dependent Claims (22, 23, 24, 25, 26)
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Specification