TIME-OF-FLIGHT BASED IMAGING SYSTEM USING A DISPLAY AS ILLUMINATION SOURCE
First Claim
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1. A time-of-flight based imaging system comprising:
- a photon emitter used as an illumination source for illuminating a scene;
a photon sensor;
an electronic system for delivering a signal depending on the reception time of photons reflected by said scene onto said photon sensor,a backlit display comprising a backlight assembly and an electronic display (2) placed in front of the backlight assembly (3)said backlight assembly being used as said illumination source and for illuminating the electronic display.
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Abstract
The present invention concerns a time-of-flight based imaging system comprising a photon emitter used as an illumination source; a photon sensor (6); an electronic system for delivering a signal depending on the reception time of photons by said photon detector, characterized in that an electronic display (2) is used as said photonic source.
92 Citations
20 Claims
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1. A time-of-flight based imaging system comprising:
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a photon emitter used as an illumination source for illuminating a scene; a photon sensor; an electronic system for delivering a signal depending on the reception time of photons reflected by said scene onto said photon sensor, a backlit display comprising a backlight assembly and an electronic display (2) placed in front of the backlight assembly (3) said backlight assembly being used as said illumination source and for illuminating the electronic display. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 20)
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16. Illumination method for an imaging system comprising at least a backlit display used as illumination source;
- a photon sensor; and
an electronic system for delivering a signal by said photon sensor;
comprising the steps of;generating a modulated illumination from successively different regions of an electronic display using a backlighting driver; computing the distances between the center of each region successively lit and the photon sensor; recording the reception time of the modulated illumination reflected by an object or the phase delay between the emitted illumination and the reflected illumination using the photon sensor. - View Dependent Claims (17, 18)
- a photon sensor; and
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19. A portable device comprising:
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an electronic display; a led-based backlighting system for backlighting said electronic display; a photon detector; an electronic system for delivering a signal depending on the time of flight of photons sent by said backlighting system, reflected by an object and received by said photon detector.
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Specification