Lighting Unit and Lamp

• US 20090147508A1
• Filed: 12/06/2008
• Published: 06/11/2009
• Est. Priority Date: 12/07/2007
• Status: Active Grant

• Current Assignee: OSRAM GmbH (Ams-Osram AG)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Marfeld, Jan, Schwalenberg, Simon, Bertram, Ralph
• Granted Patent: US 7,862,205 B2
• Time in Patent Office: Days
• 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: F21Y 2105/12 characterised by the geometrical disposition of the light-generating elements, e.g. arranging light-generating elements in differing patterns or densities
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A lighting unit has at least two submounts, wherein each submount has multiple light sources. Furthermore, a lamp may have such a lighting unit.

Claims

1. A lighting unit, comprising

at least two submounts, wherein each submount comprises multiple light sources.

2. The lighting unit according to claim 1, wherein at least two light sources of the submounts comprise different colors.

3. The lighting unit according to claim 1, wherein the at least two submounts each comprise light sources with substantially identical characteristics.

4. The lighting unit according to claim 1, comprising multiple substantially identically assembled submounts.

5. The lighting unit according to claim 3, wherein the light sources comprise substantially identical characteristics when the light sources comprise at least one of a substantially equal color, a substantially equal brightness, and a difference in brightness which is not discriminable by the human eye.

6. The lighting unit according to claim 1, comprising a plurality of submounts arranged in different locations of the lighting unit with a substantially common illumination direction.

7. The lighting unit according to claim 1, wherein a predetermined color composition for each submount can be preset by means of a ratio of the illuminating faces of the light sources.

8. The lighting unit according to claim 7, wherein the predetermined color composition is adjustable by means of differing numbers of light sources of predetermined color.

9. The lighting unit according to claim 7, wherein the predetermined color composition is adjustable by means of varying or increasing or decreasing the illuminating face of at least one light source.

10. The lighting unit according to claim 1, wherein the submounts are connected in series.

11. The lighting unit according to claim 1, wherein light sources on different submounts are connected in series.

12. The lighting unit according to claim 11, wherein light sources of equal color on different submounts are connected in series.

13. The lighting unit according to claim 1, wherein the lighting unit comprises a mounting face or a printed circuit board, wherein the submounts are at least partially countersunk or concealed in the mounting face or the printed circuit board.

14. The lighting unit according to claim 1, wherein the submount is or comprises at least one printed circuit board for at least one of accommodation and mounting of the light sources as follows:

a metal core printed circuit board;

a ceramic printed circuit board;

a printed circuit board made of FR4 material.

15. The lighting unit according to claim 1, wherein the light sources on the submount are at least one of connected and attached at least by one of means of conductors and means of wire bonds.

16. The lighting unit according to claim 1, wherein lenses for light composition are provided in each submount.

17. The lighting unit according to claim 1, wherein the lighting unit is applicable in a lighting system, in a lamp or in a spotlight.

18. The lighting unit according to claim 1, wherein the light source comprises at least one illuminant or at least one LED.

19. The lighting unit according to claim 18, comprising more than 6 LEDs or more than 12 LEDs.

20. A lamp, comprising a lighting unit according to claim 1.