Optical communication for solid-state light sources
First Claim
1. A lighting fixture for general lighting purposes, comprising:
- an array of solid-state light sources configured to generate light for general illumination; and
control circuitry configured to control a drive signal to at least one solid-state light source of the array of the solid-state light sources with a control output which is configured to;
set at least one characteristic of the light generated by the array of the solid-state light sources; and
modulate the light generated by the at least one solid-state light source with data for transmission using frequency shift keying (FSK) such that any change in the at least one characteristic based on the light being modulated is anthropically imperceptible, wherein the light from the at least one solid-state light source is pulse-width modulated (PWM) at a first frequency and a first duty cycle to represent a first bit state and the light from the at least one solid-state light source is PWM at a second frequency and a second duty cycle to represent a second bit state.
3 Assignments
0 Petitions
Accused Products
Abstract
The disclosure relates to a lighting fixture, which includes an array of solid-state light sources that are configured to generate light for general illumination lighting purposes and control circuitry. A drive signal is used to drive solid-state light sources. The control circuitry is configured to use a control output to control the drive signal to at least one of the solid-state light sources. The control output is configured to control the drive signal to 1) set at least one characteristic of the light generated by the array of the solid-state light sources, and 2) modulate the light with data for transmission. The light is modulated such that any change in the at least one characteristic based on the light being modulated is anthropically imperceptible. The characteristic of the light generated by the array of solid-state light sources may include the intensity, color, color temperature and the like.
-
Citations
21 Claims
-
1. A lighting fixture for general lighting purposes, comprising:
-
an array of solid-state light sources configured to generate light for general illumination; and control circuitry configured to control a drive signal to at least one solid-state light source of the array of the solid-state light sources with a control output which is configured to; set at least one characteristic of the light generated by the array of the solid-state light sources; and modulate the light generated by the at least one solid-state light source with data for transmission using frequency shift keying (FSK) such that any change in the at least one characteristic based on the light being modulated is anthropically imperceptible, wherein the light from the at least one solid-state light source is pulse-width modulated (PWM) at a first frequency and a first duty cycle to represent a first bit state and the light from the at least one solid-state light source is PWM at a second frequency and a second duty cycle to represent a second bit state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
-
16. A lighting fixture for general lighting purposes, comprising:
-
an array of solid-state light sources configured to generate light for general illumination; and control circuitry configured to control a drive signal to at least one solid-state light source of the array of the solid-state light sources with a control output which is configured to; set at least one characteristic of the light generated by the array of the solid-state light sources; and modulate the light with data for transmission using frequency shift keying (FSK) such that any change in the at least one characteristic based on the light being modulated is anthropically imperceptible wherein the light from the at least one solid-state light source is modulated at a first frequency to represent a first logical state, the light from the at least one solid-state light source is modulated at a second frequency to represent a second logical state, and the light from the at least one solid-state light source is modulated at a third frequency when no data is being transmitted. - View Dependent Claims (17, 18, 19)
-
-
20. A lighting fixture for general lighting purposes, comprising:
-
an array of solid-state light sources configured to generate light for general illumination; and control circuitry configured to control a drive signal to at least one solid-state light source of the array of the solid-state light sources with a control output which is configured to; set at least one characteristic of the light generated by the array of the solid-state light sources; and modulate the light with data for transmission such that any change in the at least one characteristic based on the light being modulated is anthropically imperceptible wherein when the data is not being transmitted, light from the at least one solid-state light source is modulated at a first frequency, when data is being transmitted, the light from the at least one solid-state light source is modulated at a second frequency such that a first temporal period of transmission of the light from the at least one solid-state light source at the second frequency represents a first logic state and a second temporal period of transmission of light from the at least one solid-state light source at the second frequency represents a second logic state. - View Dependent Claims (21)
-
Specification