3D image acquisition apparatus and method of driving the same
First Claim
1. A 3-dimensional (3D) image acquisition apparatus, comprising:
- a light source configured to project illumination light onto an object;
an optical shutter configured to modulate the illumination light reflected from the object with a predetermined gain waveform;
an image sensor configured to generate a depth image by detecting the illumination light modulated by the optical shutter; and
a controller configured to control an operation of the light source and an operation of the optical shutter,wherein, while the image sensor is capturing the depth image of one frame, the controller is configured to control the optical shutter such that a first interval, in which the optical shutter modulates the illumination light, and a second interval, in which the optical shutter does not modulate the illumination light and does not transmit light, are repeated a plurality of times,wherein the controller is configured to apply a first bias voltage capable of obtaining a maximum transmittance range to the optical shutter in the first interval in which the optical shutter modulates the illumination light, andwherein a length of the second interval is greater than a length of the first interval.
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Abstract
Provided is a 3-dimensional (3D) image acquisition apparatus and a method of driving the same. The 3D image acquisition apparatus includes a light source, an optical shutter, an image sensor, an image signal processor, and a controller. The light source is configured to project illumination light on an object. The optical shutter is configured to modulate the illumination light reflected from the object with a predetermined gain waveform. The image sensor is configured to generate a depth image by detecting the illumination light modulated by the optical shutter. The image signal processor is configured to calculate a distance from the 3D image acquisition apparatus to the object using the depth image generated by the image sensor. The controller is configured to control an operation of the light source and an operation of the optical shutter.
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Citations
19 Claims
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1. A 3-dimensional (3D) image acquisition apparatus, comprising:
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a light source configured to project illumination light onto an object; an optical shutter configured to modulate the illumination light reflected from the object with a predetermined gain waveform; an image sensor configured to generate a depth image by detecting the illumination light modulated by the optical shutter; and a controller configured to control an operation of the light source and an operation of the optical shutter, wherein, while the image sensor is capturing the depth image of one frame, the controller is configured to control the optical shutter such that a first interval, in which the optical shutter modulates the illumination light, and a second interval, in which the optical shutter does not modulate the illumination light and does not transmit light, are repeated a plurality of times, wherein the controller is configured to apply a first bias voltage capable of obtaining a maximum transmittance range to the optical shutter in the first interval in which the optical shutter modulates the illumination light, and wherein a length of the second interval is greater than a length of the first interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of driving a 3-dimensional (3D) image acquisition apparatus, the method comprising:
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projecting illumination light onto an object; modulating the illumination light reflected from the object with a predetermined gain waveform; generating a depth image by detecting the illumination light modulated by an optical shutter; calculating a distance from the 3D image acquisition apparatus to the object using the depth image generated by an image sensor; and controlling an operation of a light source and an operation of the optical shutter, wherein, while capturing the depth image of one frame, the optical shutter is controlled such that a first interval, in which the illumination light is modulated, and a second interval, in which the illumination light is not modulated and does not transmit light, are repeated a plurality of times, wherein a first bias voltage capable of obtaining a maximum transmittance range is applied to the optical shutter in the first interval in which the optical shutter modulates the illumination light, and wherein a length of the second interval is greater than a length of the first interval. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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Specification