LED MODULE FOR EMITTING WHITE LIGHT

• US 20170122504A1
• Filed: 03/17/2015
• Published: 05/04/2017
• Est. Priority Date: 03/27/2014
• Status: Active Grant

• Current Assignee: Tridonic Jennersdorf GMBH (Zumtobel Group AG)
• Original Assignee: Tridonic Jennersdorf GMBH (Zumtobel Group AG)
• Inventors: WIMMER, Florian, GUMHOLD, Jurgen
• Granted Patent: US 10,443,791 B2
• Time in Patent Office: Days
• 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: F21K 9/62 using mixing chambers, e.g. housings with reflective walls
• CPC Class Codes: F21K 9/64 using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer
• CPC Class Codes: F21V 3/00 Globes; Bowls; Cover glasses with refracting properties F21V5/00; with reflecting properties F21V7/00; characterised by cooling arrangements F21V29/506
• CPC Class Codes: F21V 7/22 characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
• CPC Class Codes: F21V 9/30 Elements containing photoluminescent material distinct from or spaced from the light source shades F21V1/17; globes, bowls or cover glasses F21V3/08, F21V3/12; refractors F21V5/10; reflectors F21V7/26, F21V7/30; elements with provision for controlling the spectral properties or intensity F21V9/40
• 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: F21Y 2105/18 annular; polygonal other than square or rectangular, e.g. for spotlights or for generating an axially symmetrical light beam
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin

Abstract

The invention relates to an LED-module (1) for emitting mixed light, preferably white light, comprising a light field (2′″;2″″) which is divided into several flat sectors for dispensing different light spectra. The flat sectors of the light field (2′″;2″″) are embodied as sectors of a circle (3c′41 ,3d′″;3c″″,3d″″) and sectors of a circular ring (3a′″,3′″;3a″″,3b″″).

Claims

1. An LED module (1) for emitting mixed light comprising:

a light zone (2′

″

;

2″

″

), which is divided into multiple planar sectors for emitting different light spectra, wherein the planar sectors of the light zone (2′

″

) are formed as sectors of a circle (3c′

″

, 3d′

″

;

3c″

″

, 3d″

″

) and sectors of a circular ring (3a′

″

, 3b′

″

;

3a″

″

, 3b″

″

).

2. The LED module (1) as claimed in claim 1, wherein at least two planar sectors (3a′

″

, 3a″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

) are provided for each light spectrum.

3. The LED module (1) as claimed in claim 1, wherein an outer contour of the light zone (2′

″

;

2″

″

) is circular.

4. The LED module (1) as claimed in claim 1, wherein the light zone (2′

″

;

2″

″

) has a diameter of 16 mm or less.

5. The LED module (1) as claimed in claim 1, further comprising a light-diffusing screen (4), which is arranged at a distance from the light zone (2′

″

;

2″

″

) in the light-emitting direction of the light zone (2′

″

;

2″

″

).

6. The LED module (1) as claimed in claim 5, wherein the diffusing screen (4) is separated from the upper side of the light zone (2′

″

;

2″

″

) by a mixing chamber.

7. The LED module (1) as claimed claim 1, wherein the light zone (2′

″

;

2″

″

) with the planar sectors (3a′

″

, 3a″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

) is produced by a dispensing method.

8. The LED module (1) as claimed in claim 1, wherein the planar sectors (3a′

″

, 3a″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

) of the light zone (2′

″

;

2″

″

) are separated from one another by dams (5).

9. The LED module (1) as claimed in claim 8, wherein the dams (5) have a width which, when viewed in plan view, is between 50 μ

m and 2 mm, or between 100 μ

m and 1 mm or between 300 μ

m and 800 μ

m.

10. The LED module (1) as claimed in claim 8, wherein the dams (5) are formed as reflective, with a reflecting, white or metallized surface.

11. The LED module (1) as claimed in claim 1, wherein the planar sectors (3a′

″

, 3a″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

) of the light zone (2′

″

;

2″

″

) comprise a transparent potting compound or a potting compound containing a phosphor, the phosphor being inorganic phosphor or a Q dot, and the potting compound being a silicone-based potting compound.

12. The LED module as claimed in claim 1, wherein the planar sectors (3a′

″

, 3a″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

) being designed at least for emitting light from the blue light spectrum or light from a further light spectrum produced by a phosphor.

13. The LED module as claimed in claim 1, wherein the planar sectors (3a′

″

, 3a″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

) are respectively provided with at least one LED or at least one string of LEDs (6a′

″

, 6b″

″

).

14. The LED module (1) as claimed in claim 1, wherein light with at least 2 different light spectra is emitted by the planar sectors (3a′

″

, 3a″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

).

15. The LED module (1) as claimed in claim 14, wherein one of the light spectra exhibits a peak in the range of 520-580 nm.

16. The LED module (1) as claimed in claim 14, wherein one of the light spectra exhibits at least 2 peaks.

17. The LED module (1) as claimed in claim 16, wherein one peak is positioned in the range of 520-580 nm and another in the range of 580-650 nm.

18. The LED module (1) as claimed in claim 1, wherein white light with at least 2 different color temperatures is emitted by the planar sectors.

19. The LED module (1) as claimed in claim 18, wherein a first color temperature is in the range of 2700-6500 K and a second color temperature is in the range of 6500-10000 K.

26. A lamp device comprising at least one LED module (1) as claimed in claim 1, and a reflector placed onto the LED module (1).

20. An LED module (1) for emitting mixed light comprising:

a light zone (2′

″

;

2″

″

), which is divided into multiple planar sectors for emitting different light spectra,

wherein white light with at least 2 different color temperatures is emitted by the planar sectors, and

the planar sectors of the light zone (2′

″

) comprising sectors of a circular ring (3a′

″

, 3b′

″

;

3a″

″

, 3b″

″

).

21. The LED module as claimed in claim 20, wherein the planar sectors (3a′

″

, 3a″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

) of the light zone (2′

″

;

2″

″

) are separated from one another by dams (5).

22. The LED module as claimed in claim 20, wherein the different light spectra comprises a warm white and a cold white.

23. The LED module as claimed in claim 20, wherein the planar sectors (3a′

″

, 3″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

) are adapted at least for emitting light from the blue light spectrum of at least one LED chip of the sector and light from a further light spectrum produced by a phosphor.

24. An LED module (1) produced by a method for producing an LED module (1) for emitting mixed light which comprises the following steps:

producing a light zone (2′

″

;

2″

″

), which is divided into planar sectors (3a′

″

, 3a″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

), the planar sectors of the light zone (2′

″

;

2″

″

) being formed as sectors of a circle (3c′

″

, 3d′

″

;

3c″

″

, 3d″

″

) and sectors of a circular ring (3a′

″

, 3b′

″

;

3a″

″

, 3b″

″

), by

forming dams (5), which separate sectors (3a′

″

, 3a″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

) of the light zone (2′

″

;

2″

″

) from one another; and

filling in between the dams (5) of each sector (3a′

″

, 3a″

″

, 3b′

″

, 3b″

″

, 3c′

″

, 3c″

″

, 3d′

″

, 3d″

″

) a transparent potting compound or a potting compound containing a phosphor.

25. The LED module (1) as claimed in claim 24, wherein the filling of the potting compound is carried out by a dispensing method.