Long-range motion detection for illumination control
First Claim
1. An illumination system, comprising:
- a two-dimensional non-Passive Infrared (non-PIR) imager that images an area and produces image data representative of images across at least part of a visible portion of an electromagnetic spectrum;
a light source that provides at least two levels of illumination in addition to a zero level of illumination in the area, wherein a first level of illumination corresponds to a non-zero level of illumination and a second level of illumination corresponds to a higher level of illumination than the first level of illumination; and
a controller communicatively coupled to receive the image data from the non-PIR imager that determines at least a first period which is indicative of a daylight period and a second period which is indicative of a non-daylight period, and which processes the received image data to;
detect at least one ambient environmental characteristic of the area in the part of the visible portion of the electromagnetic spectrum wherein the ambient environmental characteristic is indicative of a presence or imminent presence of a body in the area;
vary a gain setting of the non-PIR imager in response to a signal indicative of a level of ambient brightness; and
control operation of the light source by;
deactivating the light source during the first period;
activating the light source at the second illumination level in the area for at least a portion of the second period responsive to the detection of an environmental characteristic of the area indicative of a presence or imminent presence of a body in the area; and
activating the light source at the first illumination level in the area for at least a portion of the second period.
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Accused Products
Abstract
An illumination system and methods to control a light source are provided. An illumination system includes a light source, a two-dimensional non-Passive Infrared (non-PIR) imager, and a controller. The light source provides at least two levels of illumination. The non-PIR imager images an area and to produce image data representative of images across at least part of a visible portion of an electromagnetic spectrum. The controller is communicatively coupled to receive the image data from the non-PIR imager and process the received image data to detect at least one ambient environmental characteristic of the area in the part of the visible portion of the electromagnetic spectrum, where the ambient environmental characteristic is indicative of a presence or imminent presence of a body in the area. The controller is also coupled to control operation of the light source based on, at least in part, detection of the ambient characteristic of the environment.
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Citations
25 Claims
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1. An illumination system, comprising:
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a two-dimensional non-Passive Infrared (non-PIR) imager that images an area and produces image data representative of images across at least part of a visible portion of an electromagnetic spectrum; a light source that provides at least two levels of illumination in addition to a zero level of illumination in the area, wherein a first level of illumination corresponds to a non-zero level of illumination and a second level of illumination corresponds to a higher level of illumination than the first level of illumination; and a controller communicatively coupled to receive the image data from the non-PIR imager that determines at least a first period which is indicative of a daylight period and a second period which is indicative of a non-daylight period, and which processes the received image data to; detect at least one ambient environmental characteristic of the area in the part of the visible portion of the electromagnetic spectrum wherein the ambient environmental characteristic is indicative of a presence or imminent presence of a body in the area; vary a gain setting of the non-PIR imager in response to a signal indicative of a level of ambient brightness; and control operation of the light source by; deactivating the light source during the first period; activating the light source at the second illumination level in the area for at least a portion of the second period responsive to the detection of an environmental characteristic of the area indicative of a presence or imminent presence of a body in the area; and activating the light source at the first illumination level in the area for at least a portion of the second period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 23, 24)
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17. A method of controlling a light source, the method comprising:
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imaging an area with a non-Passive Infrared (non-PIR) imager to produce image data representative of at least part of a visible portion of an electromagnetic spectrum; varying a gain setting of the non-PIR imager in response to a signal indicative of a level of ambient brightness; determining at least a first period which is indicative of a daylight period and a second period which is indicative of a non-daylight period; processing by a processor the image data from the non-PIR imager to detect at least one ambient environmental characteristic of the area that is indicative of a movement in the area; adjusting, by the controller, a communicably coupled light source to produce a zero level of illumination in the area during the first period; adjusting, by the controller, the communicably coupled light source to produce a first, non-zero, level of illumination in the area during at least a portion of the second period; and in response to the detection of an environmental characteristic of the area indicative of a presence or imminent presence of a body in the area, adjusting, by the controller, the communicably coupled light source to produce a second, non-zero, level of illumination in the area, wherein the second level of illumination corresponds to a higher level of illumination than the first level of illumination. - View Dependent Claims (18, 19, 20, 21, 22, 25)
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Specification