APPARATUS AND METHOD FOR PROVIDING DOWNLIGHTING AND WALL-WASHING LIGHTING EFFECTS

• US 20170175987A1
• Filed: 11/10/2014
• Published: 06/22/2017
• Est. Priority Date: 11/26/2013
• Status: Active Grant

• Current Assignee: Signify Holding B.V. (Signify N.V.)
• Original Assignee: Philips Lighting BV (Koninklijke Philips N.V.)
• Inventors: NEWTON, PHILIP STEVEN, DEKKER, TIM, LASHINA, TATIANA ALEKSANDROVNA, VAN DE SLUIS, BARTEL MARINUS, ALIAKSEYEU, DZMITRY VIKTOROVICH
• Granted Patent: US 10,215,391 B2
• Time in Patent Office: Days
• CPC Class Codes: F21S 8/026 intended to be recessed in a ceiling or like overhead structure, e.g. suspended ceiling
• CPC Class Codes: F21S 8/04 intended only for mounting on a ceiling or the like overhead structures F21S8/02 takes precedence; details of ceiling bases F21V21/03
• CPC Class Codes: F21V 23/0435 activated by remote control means
• CPC Class Codes: F21V 23/0442 activated by means of a sensor, e.g. motion or photodetectors
• CPC Class Codes: F21V 23/0464 the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 45/12 using optical feedback
• CPC Class Codes: H05B 47/16 by timing means
• CPC Class Codes: Y02B 20/40 Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

Disclosed is a lighting fixture (200) with a separately controllable set of LED-based light sources (102) configurable to create both downlighting and wall-washing lighting effects. To create the desired wall-washing effects, the intensity and angle of light sources in the lighting fixture are adjusted to individually illuminate different portions of the wall of surface. One set of LED-based light sources positioned along the edge of the ceiling tile is configured to emit a low intensity light beam toward the upper portion of the wall surface adjacent the ceiling. Another set of LED-based light sources emits a higher intensity light beam toward an intermediate portion of the wall surface. Another set of LED-based light sources emits an even higher intensity light beam toward the bottom portion of the wall surface.

Claims

1. A lighting fixture located in close proximity to a vertical surface, the lighting fixture comprising:

a plurality of lighting units, comprising;

at least one first lighting unit comprising a first plurality of LED-based light sources configured to emit a low-intensity light beam oriented toward a first portion of the vertical surface;

at least one second lighting unit comprising a second plurality of LED-based light sources configured to emit a high-intensity light beam oriented toward a second portion of the vertical surface;

at least one third lighting unit comprising a third plurality of LED-based light sources configured to emit a light beam oriented toward a horizontal surface; and

a controller operably connected to plurality of lighting units, wherein said controller is configured to control the intensity of light emitted from said first, second, and third plurality of light sources.

2. The lighting fixture of claim 1, wherein said lighting fixture is a lighting panel configured to be mounted on a ceiling or to be integrated within a ceiling tile.

3. The lighting fixture of claim 1, further comprising at least one fourth lighting unit comprising a fourth plurality of light sources configured to emit an intermediate-intensity light beam oriented toward a third portion of the vertical surface, wherein the first portion is an upper portion of the vertical surface, the second portion is a lower portion of the vertical surface, and the third portion is an intermediate portion of the vertical surface.

4. The lighting fixture of claim 1, wherein the orientation of each of the light beams is adjustable.

5. The lighting fixture of claim 1, further comprising a sensor configured to obtain data about said vertical surface, wherein said controller is further configured to control the intensity or orientation of light emitted from one or more of said first, second, and third plurality of light sources based at least in part on said obtained data.

6. The lighting fixture of claim 1, wherein the number of third lighting units configured to emit a light beam oriented toward the horizontal surface, and the number of first and second lighting units configured to emit a light beam oriented toward the vertical surface within the plurality of lighting units, is adjustable based on positioning of the lighting fixture relative to the vertical surface.

7. The lighting fixture of claim 1, wherein a ratio of the number of third lighting units configured to emit a light beam oriented toward the horizontal surface and the number of first and second lighting units configured to emit a light beam oriented toward the vertical surface is adjustable based on positioning of the lighting fixture relative to the vertical surface.

8. The lighting fixture of claim 7, further comprising a sensor configured to obtain data about said vertical surface, wherein said controller is configured to control said ratio based at least in part on said obtained data.

9. A ceiling-mounted lighting fixture comprising:

a plurality of lighting units each comprising a plurality of LED-based light sources, wherein a first subset of said plurality of lighting units are configured to emit a light beam oriented toward a vertical surface, and wherein a second subset of said plurality of lighting units are configured to emit a light beam oriented toward a horizontal surface, and further wherein at least some of said plurality lighting units are configured to be adjustable to emit a light beam oriented toward either said vertical surface or said horizontal surface; and

a controller operably connected to said plurality of lighting units and configured to control the intensity of light emitted from said LED-based light sources, and further configured to control the orientation of the light beam emitted by each of said adjustable lighting units.

10. The ceiling-mounted lighting fixture of claim 9, wherein the orientation of the light beam emitted by each of said adjustable lighting units is based at least in part on positioning of the lighting fixture relative to the vertical surface.

11. The ceiling-mounted lighting fixture of claim 9, further comprising a sensor configured to obtain data about said vertical surface, wherein the orientation of the light beam emitted by each of said adjustable lighting units is adjusted based at least in part on said obtained data.

12. The ceiling-mounted lighting fixture of claim 9, wherein the orientation of the light beam emitted by each of said adjustable lighting units is adjusted based at least in part on input received from a user.

13. (canceled)

14. A lighting fixture located in close proximity to a vertical surface, the lighting fixture comprising:

a plurality of lighting units each comprising a plurality of light sources configured to emit a light beam having an adjustable orientation, wherein a first subset of the plurality of lighting units are configured to emit a light beam oriented toward an upper portion of the vertical surface, a second subset of the plurality of lighting units are configured to emit a light beam oriented toward an intermediate portion of the vertical surface, a third subset of the plurality of lighting units are configured to emit a light beam oriented toward a lower portion of the vertical surface, and a fourth subset of the plurality of lighting units are configured to emit a light beam oriented toward a horizontal surface; and

a controller operably connected to said plurality of lighting units, wherein said controller is configured to control the intensity of light emitted from said plurality of light sources, and wherein said controller is further configured to control the orientation of each of said plurality of light sources.

15. The lighting fixture of claim 14, wherein the orientation of the light beam emitted by one or more of said plurality of lighting units is based at least in part on positioning of the lighting fixture relative to the vertical surface.

16. The lighting fixture of claim 14, wherein the number of lighting units within said first subset, second subset, third subset, and fourth subset is adjusted based on positioning of the lighting fixture relative to the vertical surface.

17. The lighting fixture of claim 14, further comprising a sensor configured to obtain data about said vertical surface, wherein the orientation of the light beam emitted by one or more of said plurality of lighting units is based at least in part on said obtained data.

18. The lighting fixture of claim 14, further comprising a user interface configured to receive input from a user, wherein the orientation of the light beam emitted by one or more of said plurality of lighting units is based at least in part on said received input.

19. A method for providing wall-washing lighting effects, the method comprising the steps of:

providing a lighting fixture comprising;

(i) a plurality of lighting units each comprising a plurality of LED-based light sources, wherein a first subset of said plurality of lighting units are configured to emit a light beam oriented toward a vertical surface, and wherein a second subset of said plurality of lighting units are configured to emit a light beam oriented toward a horizontal surface, and further wherein at least some of said plurality lighting units are configured to be adjustable to emit a light beam oriented toward either said vertical surface or said horizontal surface; and

(ii) a controllers operably connected to said plurality of lighting units and configured to control the orientation of the light beam emitted by each of said adjustable lighting units based at least in part on a position of the lighting fixture relative to the vertical surface;

receiving information indicating the position of the lighting fixture relative to the vertical surface; and

adjusting the orientation or intensity of the light beam emitted by one or more of said adjustable lighting units based on said received information.

21. The method of claim 19, wherein said information is received from a user.

22. The method of claim 19, wherein said information is received from an ambient light level sensor configured to obtain ambient light level data.

20. (canceled)