Illumination control method and illumination control system and illumination system using the same
US-2016128161-A1 · May 5, 2016 · US
Lighting fixture with image sensor module
US9769900B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9769900-B2 |
| Application number | US-201514928592-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 30, 2015 |
| Priority date | Oct 30, 2015 |
| Publication date | Sep 19, 2017 |
| Grant date | Sep 19, 2017 |
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Abstract
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A lighting fixture includes a control system, a light source, and an image sensor module. The image sensor module is configured to capture image data and process the image data to provide derived image data, such that the derived image data is downsampled from the image data. The derived image data is used by the control system to adjust one or more characteristics of light provided by the light source.
First claim
Opening claim text (preview).
What is claimed is: 1. A lighting fixture comprising: a light source; an image sensor module configured to capture image data and process the image data to provide derived image data, which is downsampled from the image data and comprises zoned mean light intensity data; and a control system coupled to the image sensor module and the light source and configured to: detect an occurrence of an occupancy event in an area surrounding the lighting fixture based on the derived image data, wherein detecting the occurrence of the occupancy event comprises: maintaining a running average of mean light intensity for each one of a plurality of zones in a frame; and determining if a difference between an instantaneous mean light intensity value for a particular one of the plurality of zones and the running average of mean light intensity for the particular one of the plurality of zones is above a predetermined threshold; and adjust one or more characteristics of light provided by the light source based on a determination of the occupancy event. 2. The lighting fixture of claim 1 wherein the running average of mean light intensity values is a weighted running average of mean light intensity values. 3. The lighting fixture of claim 1 wherein detecting the occurrence of the occupancy event further comprises determining if the difference between the instantaneous mean light intensity value and the running average for each one of a number of the plurality of zones is above the predetermined threshold. 4. The lighting fixture of claim 1 wherein detecting the occurrence of the occupancy event further comprises normalizing the difference between the instantaneous mean light intensity value for the particular one of the plurality of zones and the running average for the particular one of the plurality of zones. 5. The lighting fixture of claim 4 wherein detecting the occurrence of the occupancy event further comprises determining if the difference between the instantaneous mean light intensity value and the running average for each one of a number of the plurality of zones is above the predetermined threshold. 6. The lighting fixture of claim 1 wherein the light source is a light emitting diode (LED) light source. 7. The lighting fixture of claim 6 wherein the LED light source includes a plurality of LED strings, each comprising a plurality of LEDs coupled in series and configured to provide light with different characteristics such that the aggregate light output of the LED light source provides light with one or more desired characteristics. 8. The lighting fixture of claim 4 wherein the difference between the instantaneous mean light intensity value for the particular one of the plurality of zones and the running average for the particular one of the plurality of zones is normalized based on an ambient light level in the area surrounding the lighting fixture. 9. The lighting fixture of claim 1 wherein the derived image data is provided as part of an autoexposure process of the image sensor module.
Assignees
Inventors
Classifications
by determining the brightness or colour temperature of ambient light · CPC title
Electricity · mapped topic
Electricity · mapped topic
- H05B33/0854Primary
Electricity · mapped topic
by using cameras · CPC title
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Frequently asked questions
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- What does patent US9769900B2 cover?
- A lighting fixture includes a control system, a light source, and an image sensor module. The image sensor module is configured to capture image data and process the image data to provide derived image data, such that the derived image data is downsampled from the image data. The derived image data is used by the control system to adjust one or more characteristics of light provided by the ligh…
- Who is the assignee on this patent?
- Cree Inc
- What technology area does this patent fall under?
- Primary CPC classification H05B33/0854. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 19 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).