Methods and devices for projection of lighting effects carrying information

• US 9,693,410 B2
• Filed: 09/19/2014
• Issued: 06/27/2017
• Est. Priority Date: 10/04/2013
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Philips Lighting BV (Koninklijke Philips N.V.)
• Inventors: Davies, Robert James, Holtman, Koen Johanna Guillaume
• Primary Examiner(s): King, Monica C
• Application Number:
  US15/027,128
• Publication Number:
  US 20160249426A1
• Time in Patent Office: 1,012 Days
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/60 Circuit arrangements for operating LEDs comprising organic material, e.g. for operating organic light-emitting diodes [OLED] or polymer light-emitting diodes [PLED]
• CPC Class Codes: H05B 47/19 via wireless transmission

Abstract

Methods, apparatus, and systems are disclosed herein for projecting lighting effects (124, 224, 324, 424) carrying light messages onto surfaces. A first of one or more light-emitting diodes (LEDs, 554) of a lighting fixture (120, 220, 320, 420, 520) may be selectively energized to produce a first coded light signal conveying a first light message associable with a first location. Light emitted from the first LED may be projected onto a first surface, e.g., as a spatially-limited lighting effect. In some embodiments, a second of the one or more LEDs of the lighting fixture may be selectively energized to produce a second coded light signal conveying a second light message associable with a second location distinct from the first location. Light emitted from the second LED may be projected onto the first surface or a second surface. Alternatively, lighting effects of various shapes and hues may convey information.

Claims

1. A lighting fixture, comprising:

a housing;

at least two light-emitting diodes (LEDs) contained on or within the housing and configured to project at least two beams of light on one or more surfaces, the at least two beams of light creating respectively a first and a second spatially-limited lighting effect on the one or more surfaces;

a controller contained within the housing and operably coupled to the at least two LEDs and configured to selectively energize the at least two LEDs to cause the first and second spatially-limited lighting effects to carry at least two distinct coded light signals simultaneously, wherein the at least two projected spatially-limited lighting effects provide detectable locational data.

2. The lighting fixture of claim 1, wherein the at least two distinct light signals are conveyed at least in part by a plurality of distinct coded light signals carried by the at least two projected lighting effects.

3. The lighting fixture of claim 1, wherein the at least two distinct light signals are conveyed at least in part by a plurality of distinct hues of the at least two projected lighting effects.

4. The lighting fixture of claim 1, wherein the at least two distinct light signals are conveyed at least in part by a plurality of distinct shapes of the at least two projected lighting effects.

5. The lighting fixture of claim 1, further comprising at least two optical elements shaped to direct light emitted by the at least two LEDs onto one or more surfaces.

6. The lighting fixture of claim 5, wherein at least one of the at least two optical elements is configured to shape light emitted from at least one of the at least two LEDs into the asymmetrically-shaped projected light effect.

7. The lighting fixture of claim 5, wherein the at least two optical elements are shaped to direct light emitted by the at least two LEDs so that the at least two projected lighting effects are positioned to correspond with a plurality of aisles.

8. The lighting fixture of claim 1, further comprising a mask with at least two shaped apertures configured to define shapes of the at least two lighting effects.

9. The lighting fixture of claim 1, further comprising a general purpose light source mounted on or within the housing and configured to illuminate a space proximate the lighting fixture.

10. The lighting fixture of claim 1, wherein the housing is configured to be mounted on a wall or ceiling.

11. The lighting fixture of claim 1, wherein the at least two LEDs are configured to project the at least two lighting effects with an intensity selected to make the at least two lighting effects visually imperceptible to a human and detectable by an optical sensor of a mobile computing device.

12. The lighting fixture of claim 1, wherein the at least two distinct coded light signals are associable with a plurality of distinct locations.

13. A method, comprising:

selectively energizing, by a controller of a lighting fixture, a first of a plurality of light-emitting diodes (LEDs) of the lighting fixture to produce a first coded light signal that conveys a first light message associable with a first location, the first light message providing detectable locational data via emitted light;

projecting, by the lighting fixture, light emitted from the first LED onto a first surface;

selectively energizing, by the controller, a second of the plurality of LEDs of the lighting fixture to produce a second coded light signal that conveys a second light message associable with a second location distinct from the first location, the second light message providing detectable locational data via emitted light; and

projecting, by the lighting fixture, light emitted from the second LED onto the first surface or a second surface.

14. The method of claim 13, wherein projecting the light emitted from the first LED comprises projecting the light emitted from the first LED onto a portion of a ceiling above a first aisle of a plurality of parallel aisles, and wherein projecting the light emitted from the second LED comprises projecting the light emitted from the second LED onto a portion of the ceiling above a second aisle of the plurality of parallel aisles.

15. The method of claim 13, wherein projecting the light emitted from the first LED comprises projecting the light emitted from the first LED onto a floor of a first aisle of a plurality of parallel aisles.

16. The method of claim 15, wherein projecting the light emitted from the second LED comprises projecting the light emitted from the second LED onto a floor of a second aisle of a plurality of parallel aisles.

17. The method of claim 15, wherein projecting the light emitted from the second LED comprises projecting the light emitted from the second LED onto a shelf of a second aisle of the plurality of parallel aisles.

18. A lighting fixture, comprising:

a housing;

first and second light-emitting diodes (LEDs) contained within the housing;

first and second optical elements mounted on the housing and configured to direct light emitted from the first and second LEDs onto one or more surfaces; and

a controller operably coupled to the first and second LEDs and configured to;

illuminate the first LED to produce a first coded light signal that conveys a first light message associable with a first location, the first light message providing detectable locational data via emitted light; and

illuminate the second LED to produce a second coded light signal that conveys a second light message associable with a second location distinct from the first location, the second light message providing detectable locational data via emitted light.

19. The lighting fixture of claim 18, further comprising a mask with first and second shaped apertures configured to define shapes of first and second projected lighting effects created by the first and second LEDs, respectively.

20. The lighting fixture of claim 19, wherein the first and second shaped apertures are configured to define first and second distinct shapes of the first and second projected lighting effects.