Lighting systems generating visible-light emissions for dynamically emulating sky colors

Patent metadata

Field	Value
Publication number	US-11635188-B2
Application number	US-202017100666-A
Country	US
Kind code	B2
Filing date	Nov 20, 2020
Priority date	Mar 27, 2017
Publication date	Apr 25, 2023
Grant date	Apr 25, 2023

Abstract

Lighting system including visible-light source, optical system, mounting system, and control system. Visible-light source includes plurality of semiconductor light-emitting devices (SLEDs) and selectably generates: visible-light emissions having cyan-ish color point; and visible-light emissions having orange-ish color point. Optical system and mounting system are integrated with visible-light source. Optical system is arranged to combine together, into combined light emissions, visible-light emissions from SLEDs among plurality of SLEDs. Mounting system is arranged for directing combined light emissions as up-light emissions. Control system is coupled with visible-light source and selectably causes visible-light emissions to have cyan-ish color point or orange-ish color point. Control system and optical system cooperatively form combined up-light emissions as having dynamic spectrum for emulating orange-ish sky color at time of day selected to represent sunrise sky or to represent sunset sky, changing over time for emulating cyan-ish sky color at another time of day selected to represent mid-day sky.

First claim

We claim:

1. A lighting system, comprising:
a visible-light source including a plurality of semiconductor light-emitting devices, the visible-light source selectably generating visible-light emissions having a cyan-ish color point, being a perceived color point having a dominant wavelength within a range of between about 480 nanometers and about 540 nanometers, the visible-light source also selectably generating the visible-light emissions as having an orange-ish color point;
an optical system being integrated with the visible-light source, the optical system being arranged to combine together, into combined light emissions, visible-light emissions from semiconductor light-emitting devices among the plurality of the semiconductor light-emitting devices;
a mounting system being integrated with the visible-light source, the mounting system being arranged for directing the combined light emissions as being up-light emissions; and
a control system being coupled with the visible-light source, the control system selectably causing the visible-light emissions to have the cyan-ish color point or the orange-ish color point;
wherein the control system and the optical system cooperatively form the combined up-light emissions as having a dynamic spectrum for emulating an orange-ish sky color having the orange-ish color point at a time of day selected to represent a sunrise sky or to represent a sunset sky, and changing over time for emulating a cyan-ish sky color having the cyan-ish color point at another time of day selected to represent a mid-day sky.

2. The lighting system of claim 1 , wherein the control system is for causing the visible-light emissions to have the orange-ish color point as emulating the sunrise sky at an emulated sunrise or as emulating the sunset sky at an emulated sunset, and for causing the visible-light emissions to have the cyan-ish color point as emulating the mid-day sky at an emulated mid-day.

3. The lighting system of claim 1 , wherein the control system is for causing the visible-light source to selectably generate the visible-light emissions having the cyan-ish color point as further having a relatively greater level of input power at an emulated mid-day and as additionally having a relatively lesser level of input power at an emulated sunrise or at an emulated sunset.

4. The lighting system of claim 1 , wherein the control system is for causing the visible-light source to selectably generate the visible-light emissions having the orange-ish color point as further having a relatively lesser level of input power at an emulated mid-day and as additionally having a relatively greater level of input power at an emulated sunrise or at an emulated sunset.

5. The lighting system of claim 1 , wherein the plurality of the semiconductor light-emitting devices includes a lumiphor for down-converting visible-light emissions of a one of the semiconductor light-emitting devices having a first dominant wavelength into further visible-light emissions having a second dominant wavelength being less than the first dominant wavelength to generate the cyan-ish color point.

6. The lighting system of claim 1 , wherein the plurality of the semiconductor light-emitting devices includes three semiconductor light-emitting devices being mutually spaced apart by the visible-light source in a linear array, and wherein the control system separately provides input power for driving each one of the three of the semiconductor light-emitting devices.

7. The lighting system of claim 1 , wherein the plurality of the semiconductor light-emitting devices includes three elongated strings each including a plurality of the semiconductor light-emitting devices, the three elongated strings being mutually spaced apart by the visible-light source as each respectively including one of three linear arrays, and wherein the control system separately provides input power for driving each one of the three elongated strings of the semiconductor light-emitting devices.

8. The lighting system of claim 1 , wherein the orange-ish color point is a perceived color point having a dominant wavelength being within a range of between about 575 nanometers and about 620 nanometers.

9. The lighting system of claim 1 , including:
a further visible-light source including a further plurality of semiconductor light-emitting devices, the further visible-light source generating further visible-light emissions;
a further optical system being integrated with the further visible-light source, the further optical system being arranged to combine together, into further combined light emissions, the further visible-light emissions from semiconductor light-emitting devices among the further plurality of the semiconductor light-emitting devices;
a further control system being coupled with the further visible-light source; and
a further mounting system being integrated with the further visible-light source, the further mounting system being arranged for directing the further combined light emissions as being downlight emissions.

10. The lighting system of claim 9 , wherein the further visible-light source is adapted to selectively generate warm white light and cool white light.

11. The lighting system of claim 9 , wherein the further control system and the further optical system cooperatively form the further combined downlight emissions as having another dynamic spectrum including a warm to very warm white color point for emulating the sunrise sky or for emulating the sunset sky, and including a cool to very cool white color point for emulating the mid-day sky.

12. The lighting system of claim 11 , wherein the further control system is for causing the further visible-light source to dynamically change the combined downlight emissions from warm white light to cool white light in coordination with the combined up-light emissions as changing over time between emulating the sunrise or sunset sky and emulating the mid-day sky.

13. The lighting system of claim 12 , wherein the further control system is for causing the combined downlight emissions of the further plurality of the semiconductor light-emitting devices to have the warm white color point with a correlated color temperature (CCT) as being within a range of between about 1800K and about 3500K at the emulated sunrise sky or at the emulated sunset sky.

14. The lighting system of claim 12 , wherein the further control system is for causing the combined downlight emissions of the further plurality of the semiconductor light-emitting devices to have the cool white color point with a correlated color temperature (CCT) as being within a range of between about 3500K and about 10000K at the emulated midday sky.

15. The lighting system of claim 9 , wherein the further plurality of the semiconductor light-emitting devices includes three further semiconductor light-emitting devices being mutually spaced apart by the further visible-light source in a further linear array, and wherein the further control system separately provides input power for driving each one of the three of the further semiconductor light-emitting devices for respectively producing distributions of the further visible-light emissions as being left wall wash, center wall graze, and right wall wash.

16. The lighting system of claim 15 , wherein the further control system includes a plurality of selectable pre-set input power distributions defining levels of relative input power for each one of the three of the further semiconductor light-emitting devices.

17. The lighting system of claim 9 , wherein the further plurality of the semico

Assignees

• Ecosense Lighting Inc
• Korrus Inc

Inventors

• Pickard Paul
• Petluri Raghuram L V

Classifications

• F21V13/02

  Combinations of only two kinds of elements · CPC title

• F21V23/0442

  activated by means of a sensor, e.g. motion or photodetectors · CPC title

• G02B6/003

  Lens or lenticular sheet or layer · CPC title

• H05B45/20

  Controlling the colour of the light · CPC title

• F21V7/0091 Primary

  using total internal reflection · CPC title