Led-lamp, power-line network system, writing method for location information, projector, data processing method and collision avoidance system
US-2015132006-A1 · May 14, 2015 · US
Visible-light based communication and occupancy detection
US9755741B1 · US · B1
| Field | Value |
|---|---|
| Publication number | US-9755741-B1 |
| Application number | US-201514607754-A |
| Country | US |
| Kind code | B1 |
| Filing date | Jan 28, 2015 |
| Priority date | Jan 28, 2014 |
| Publication date | Sep 5, 2017 |
| Grant date | Sep 5, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A lighting device for illumination, data communication, and occupancy detection includes a processor and a transmitter circuit that is configured to generate a first electrical signal. During a first time duration, the first electrical signal is a carrier signal having a first frequency, and during a second time duration, the first electrical signal is a data encoded signal. The lighting device further includes a light source configured to emit a first visible light based on the first electrical signal. The lighting device also includes a receiver configured to receive a second visible light. The processor is configured to detect a motion in a monitored area based on the second visible light.
First claim
Opening claim text (preview).
What is claimed is: 1. A lighting device for illumination, data communication, and occupancy detection, the lighting device comprising: a processor; a transmitter circuit configured to generate a first electrical signal; a light source configured to emit a first visible light based on the first electrical signal; and a receiver configured to receive a second visible light and to convert the second visible light into a second electrical signal, wherein the processor is configured to determine whether the second electrical signal is a carrier signal that is unencoded with data and wherein the processor is configured to detect a motion in a monitored area based on the second electrical signal in response to determining the second electrical signal is the carrier signal. 2. The lighting device of claim 1 , wherein the processor is configured to determine a direction of the motion. 3. The lighting device of claim 2 , wherein the lighting device is configured to increase an intensity level of the first visible light in response to the processor determining the motion is toward the lighting device. 4. The lighting device of claim 1 , wherein the processor is configured to decode the second electrical signal in response to determining that the second electrical signal is a data encoded signal. 5. The lighting device of claim 1 , wherein at least a portion of the second visible light is a portion of the first visible light that is reflected off a stationary object or a mobile object. 6. The lighting device of claim 1 , wherein the first electrical signal is the carrier signal having a carrier frequency during a first time duration and wherein the first electrical signal is a data encoded signal during a second time duration. 7. The lighting device of claim 1 , wherein the first electrical signal has a first frequency during a first time duration. 8. The lighting device of claim 7 , wherein the processor is configured to detect the motion in the monitored area based on the first frequency of the first electrical signal and a frequency of the second electrical signal. 9. The lighting device of claim 1 , wherein the processor is configured to detect the motion in the monitored area based on a reference frequency and a frequency of the second electrical signal.
Assignees
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Classifications
- H04B10/116Primary
Visible light communication · CPC title
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9755741B1 cover?
- A lighting device for illumination, data communication, and occupancy detection includes a processor and a transmitter circuit that is configured to generate a first electrical signal. During a first time duration, the first electrical signal is a carrier signal having a first frequency, and during a second time duration, the first electrical signal is a data encoded signal. The lighting device…
- Who is the assignee on this patent?
- Elwell Brian Eugene, Cooper Technologies Co
- What technology area does this patent fall under?
- Primary CPC classification H04B10/116. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Sep 05 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).