Lighting arrangement and solid-state light source

• US 7,909,479 B2
• Filed: 06/09/2006
• Issued: 03/22/2011
• Est. Priority Date: 06/10/2005
• Status: Expired due to Fees

• Current Assignee: Lemnis Lighting Patent Holding B.V.
• Original Assignee: Lemnis Lighting Patent Holding B.V.
• Inventors: Rooymans, Johannus Otto
• Primary Examiner(s): Lee; Y My Quach
• Application Number:
  US11/920,576
• Publication Number:
  US 20090175038A1
• Time in Patent Office: 1,747 Days
• Field of Search: 362/227, 362/230, 362/231, 362/800, 362/545
• US Class Current: 362/231
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21S 8/086 with lighting device attached sideways of the standard, e.g. for roads and highways
• CPC Class Codes: F21V 21/30 Pivoted housings or frames
• CPC Class Codes: F21W 2131/103 of streets or roads
• CPC Class Codes: F21W 2131/109 of gardens
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

The invention relates to a lighting arrangement for illuminating a surface. The lighting arrangement has a supporting element and a lighting unit (1) which is supported by the supporting element. The lighting unit (1) has a housing (2) which is designed to accommodate a solid-state light source (4). The housing is also transparent on at least one side. The solid-state light source (4) is suitable for generating light having wavelengths from a first wavelength region and a second wavelength region. The first wavelength region comprises wavelengths of 500-550 nm. The second wavelength region comprises wavelengths of 560-610 nm. The lighting unit (1) is designed to generate light having a dominant wavelength from the first wavelength region in such a way that the eye sensitivity of the human eye is dominated by rods.

Claims

1. Lighting arrangement for illuminating a surface comprising:

a supporting element;

a lighting unit which is supported by the supporting element;

wherein the lighting unit comprises a housing which is designed to accommodate a solid-state light source which, when in use, generates light having wavelengths from a first wavelength region and a second wavelength region, the housing being transparent on at least one side,

wherein the wavelengths of the first wavelength region are shorter than the wavelengths of the second wavelength region, the first wavelength region has a wavelength range of between 500-550 nm, the wavelengths of the first wavelength region and the second wavelength region are separated by more than 20 nm, and the lighting unit generates light in the first wavelength region 3-5 times greater than the light of the second wavelength region.

2. Lighting arrangement according to claim 1, wherein the lighting arrangement illuminates the surface to be illuminated with a light intensity of 5-30 lux.

3. Lighting arrangement according to claim 1, wherein that the solid-state light source has a minimum output of 300 lumens.

4. Lighting arrangement according to claim 1, wherein the lighting unit further comprises a light processing unit for processing at least one of the intensity and the direction of light generated by the solid-state light source.

5. Lighting arrangement according to claim 1, wherein the solid-state light source comprises a plurality of Light Emitting Diodes.

6. Lighting arrangement according to claim 5, wherein the LEDs have a beam angle of 30-70°

.

7. Lighting arrangement according to claim 5, wherein the LEDs are arranged in such a way that the light source in use emits light at an angle of at least 20°

relative to the surface to be illuminated.

8. Lighting arrangement according to claim 7, wherein the angle relative to the surface to be illuminated does not exceed 30°

.

9. Lighting arrangement according to claim 1, wherein the lighting unit further comprises a supply for connection to the solid-state light source and being designed to provide the solid-state light source with an electricity supply.

10. Lighting arrangement according to claim 1, wherein the first wavelength region comprises wavelengths of 500-530 nm and the second wavelength region comprises wavelengths of 560-590 nm.

11. Lighting arrangement according to claim 1, wherein the dominant wavelength in the first wavelength region is 507 nm.

12. Lighting arrangement according to claim 1, wherein the solid-state light source comprises a plurality of Light Emitting Diodes, wherein the plurality of LEDs comprises:

a number of first LEDs for emitting light having a wavelength situated in the first wavelength region; and

a number of second LEDs for emitting light having a wavelength situated in the second wavelength region.

13. Lighting arrangement according to claim 12, wherein the lighting unit further comprises a further light processing unit which processes the light coming from the number of first LEDs and the light coming from the number of second LEDs in manners which differ from one another.

14. Lighting arrangement according to claim 1, characterized in that the lighting arrangement further comprises a cover element which has an orifice and is positioned in such a way around the lighting unit that the orifice coincides with the transparent side of the housing of the lighting unit.

15. Lighting arrangement according to claim 1, wherein the lighting unit comprises green LEDs and amber LEDs, the green LEDs generating light in the first wavelength region and the amber LEDs generating light in the second wavelength region.

16. Lighting arrangement according to claim 1, wherein the second wavelength region comprises wavelengths of 560-610 nm.

17. Solid-state light source which, when in use, generates light having wavelengths situated in a first wavelength region and wavelengths situated in a second wavelength region, wherein the first wavelength region comprises wavelengths of 500-550 nm, the second wavelength region comprises wavelengths of 560-610 nm, and the solid-state light source has a light yield in the first wavelength region that is 3-5 times greater than the light yield in the second wavelength region.

18. Solid-state light source according to claim 17, wherein the solid-state light source has a minimum light output of 300 lumens.

19. Solid-state light source according to claim 17 wherein the solid-state light source comprises a plurality of Light Emitting Diodes (LEDs), wherein the plurality of LEDs comprises:

a number of first LEDs for emitting light having a wavelength situated in the first wavelength region; and

a number of second LEDs for emitting light having a wavelength situated in the second wavelength region.

20. Solid-state light source according to claim 18, wherein at least one of the plurality of LEDs have a beam angle of 30-70°

.