LED module having planar sectors for emitting different light spectra

• US 10,443,791 B2
• Filed: 03/17/2015
• Issued: 10/15/2019
• 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
• Primary Examiner(s): Ellis, Suezu
• Application Number:
  US15/128,733
• Publication Number:
  US 20170122504A1
• 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′″,3d′″;3c″″,3d″″) and sectors of a circular ring (3a′″,3′″;3a″″,3b″″).

Claims

1. A light emitting diode (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, and

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″

″

), 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″

″

),

the planar sectors of the light zone (2′

″

) each include an individual voltage-carrying line such that the planar sectors of the light zone (2′

″

) are individually driven,

wherein the planar sectors of the light zone (2′

″

) include strings of LEDs, and the string of LEDs have varying voltage potentials,

each voltage-carrying line is positioned in a transitional region between adjacent planar sectors of the planar sectors of the light zone (2′

″

), and

each voltage-carrying line extends in a radial direction to separate adjacent sectors of the 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, wherein the diffusing screen (4) is separated from the upper side of the light zone (2″

′

;

2″

″

) by a mixing chamber.

6. 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.

7. 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).

8. The LED module (1) as claimed in claim 7, 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 μ

m or between 300 μ

m and 800 μ

m.

9. The LED module (1) as claimed in claim 7, wherein the dams (5) are reflective, with a reflecting, white or metallized surface.

10. 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.

11. 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 different light spectrum produced by a phosphor.

12. 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″

″

).

13. 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″

″

).

14. The LED module (1) as claimed in claim 13, wherein one of the light spectra exhibits a peak in the range of 520-580 nm.

15. The LED module (1) as claimed in claim 13, wherein one of the light spectra exhibits a peak in the range of 520-580 nm and another in the range of 580-650 nm.

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

17. The LED module (1) as claimed in claim 16, 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.

18. The LED module (1) as claimed in claim 1, wherein adjacent sectors of the circular ring (3a″

′

, 3b″

′

;

3a″

″

, 3b″

″

) in the radial direction and circumferential direction have varying potentials.

19. 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. A light emitting diode (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, and

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″

″

),

wherein white light with at least two 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″

″

),

the planar sectors of the light zone (2′

″

) each include an individual voltage-carrying line such that the planar sectors of the light zone (2′

″

) are individually driven,

wherein the planar sectors of the light zone (2′

″

) include strings of LEDs, and the string of LEDs have varying voltage potentials,

each voltage-carrying line is positioned in a transitional region between adjacent planar sectors of the planar sectors of the light zone (2′

″

), and

each voltage-carrying line extends in a radial direction to separate adjacent sectors of the 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 light zone has differing color temperatures including a warm white and a cold white.

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

″

, 3a″

″

, 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. A method for producing a light emitting diode (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″

″

),

arranging a light-diffusing screen (4) at a distance from the light zone (2′

″

;

2″

″

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

″

;

2″

″

), 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 the planar 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, and

providing a voltage-carrying line for each planar sector of the planar sectors of the light zone (2′

″

) such that the planar sectors of the light zone (2′

″

) are individually driven,

wherein the planar sectors of the light zone (2′

″

) include strings of LEDs, and the string of LEDs have varying voltage potentials,

each voltage-carrying line is positioned in a transitional region between adjacent planar sectors of the planar sectors of the light zone (2′

″

), and

each voltage-carrying line extends in a radial direction to separate adjacent sectors of the circular ring (3a″

′

, 3b″

′

;

3a″

″

, 3b″

″

).

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