LIGHTING DEVICE AND LIGHTING METHOD

• US 20090296384A1
• Filed: 06/01/2009
• Published: 12/03/2009
• Est. Priority Date: 12/01/2006
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: Cree Lighting Company (Ideal Industries Incorporated)
• Inventors: VAN DE VEN, Antony Paul, NEGLEY, Gerald H.
• Granted Patent: US 9,441,793 B2
• Time in Patent Office: Days
• US Class Current: 362/231
• CPC Class Codes: F21K 9/232 specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H01L 2224/45147 Copper (Cu) as principal constituent
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/48247 connecting the wire to a bond pad of the item
• 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 2924/00012 Relevant to the scope of the group, the symbol of which is combined with the symbol of this group
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2924/181 Encapsulation
• CPC Class Codes: H05B 45/00 Circuit arrangements for operating light-emitting diodes [LED]
• CPC Class Codes: H05B 45/22 using optical feedback

Abstract

There is provided a lighting device that comprises at least one 600-630 nm solid state light emitter and at least one light source emitting light within an area on a 1931 CIE Chromaticity Diagram defined by a first set of points having x, y coordinates of (0.32, 0.40), (0.36, 0.48), (0.43, 0.45), (0.42, 0.42), (0.36, 0.38), or a second set of points having x, y coordinates of (0.29, 0.36), (0.32, 0.35), (0.41, 0.43), (0.44, 0.49), (0.38, 0.53). Some embodiments further comprise at least a first power line. Also provided are methods that comprise illuminating at least one light source to emit light within one of the areas defined above, and illuminating at least one 600-630 nm emitter.

Claims

1. A lighting device comprising:

at least one light source which, when illuminated, emits light which, in an absence of any additional light, has x, y color coordinates which define a point which is within a first area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, the first line segment connecting a first point to a second point, the second line segment connecting the second point to a third point, the third line segment connecting the third point to a fourth point, the fourth line segment connecting the fourth point to a fifth point, and the fifth line segment connecting the fifth point to the first point, the first point having x, y coordinates of 0.32, 0.40, the second point having x, y coordinates of 0.36, 0.48, the third point having x, y coordinates of 0.43, 0.45, the fourth point having x, y coordinates of 0.42, 0.42, and the fifth point having x, y coordinates of 0.36, 0.38; and

a first group of solid state light emitters, the first group of solid state light emitters comprising at least a first solid state light emitter, each of the first group of light emitters, when illuminated, emitting light having a dominant emission wavelength in the range of from about 600 nm to about 630 nm.

2. A lighting device as recited in claim 1, wherein each of the first group of light emitters, when illuminated, emits light having a dominant emission wavelength in the range of from about 602 nm to about 615 nm.

3. A lighting device as recited in claim 1, wherein each of the first group of light emitters, when illuminated, emits light having a dominant emission wavelength in the range of from about 611 nm to about 615 nm.

4. A lighting device as recited in claim 1, wherein each of the first group of light emitters, when illuminated, emits light having a dominant emission wavelength in the range of from about 605 nm to about 615 nm.

5. A lighting device as recited in claim 1, wherein each of the first group of light emitters, when illuminated, emits light having a dominant emission wavelength in the range of from about 610 nm to about 615 nm.

6. A lighting device as recited in claim 1, wherein each of the first group of light emitters, when illuminated, emits light having a dominant emission wavelength in the range of from about 612 nm to about 615 nm.

7. A lighting device as recited in claim 1, wherein when the at least one light source is illuminated and the first group of solid state light emitters is illuminated,

a mixed illumination of (a) light exiting the lighting device which was emitted by the at least one light source and (b) light exiting the lighting device which was emitted by the first group of solid state light emitters has x, y coordinates on a 1931 CIE Chromaticity Diagram which define a point which is within 10 MacAdam ellipses of at least one point on the blackbody locus on a 1931 CIE Chromaticity Diagram.

8. A lighting device as recited in claim 7, wherein the mixed illumination has a CRI of at least 70 and the lighting device has a wall plug efficiency of at least 70 lumens per watt.

9. A lighting device as recited in claim 1, wherein:

at least a first of the at least one light source comprises a second group of solid state light emitters and at least a first luminescent material, the second group of solid state light emitters includes at least a second solid state light emitter;

each of the second group of solid state light emitters, when illuminated, emits light having a peak emission wavelength in the range of from 400 μ

m to 480 μ

m; and

the first luminescent material, when excited, emits light having a dominant emission wavelength in the range of from about 555 μ

m to about 585 nm.

10. A lighting device as recited in claim 9, wherein:

if each of the second group of solid state light emitters is illuminated, a combination of (1) light exiting the lighting device which was emitted by the second group of solid state light emitters, and (2) light exiting the lighting device which was emitted by the first luminescent material would, in an absence of any additional light, produce a mixed illumination which defines a point which is within the first area.

11. A lighting device as recited in claim 9, wherein each of the second group of solid state light emitters, when illuminated, emits light having a peak emission wavelength in the range of from 430 nm to 480 mm.

12. A lighting device as recited in claim 1, wherein:

at least a first of the at least one light source comprises a white light source and a filter,

the white light source emits white light source light that has x, y coordinates on a 1931 CIE Chromaticity Diagram which define a point which is within 10 MacAdam ellipses of at least one point on the blackbody locus on a 1931 CIE Chromaticity Diagram, and

the filter removes at least some light from the white light source light to form light which, in an absence of any additional light, has x, y color coordinates which define a point which is within the first area on a 1931 CIE Chromaticity Diagram enclosed by the first, second, third, fourth and fifth line segments.

13. A lighting device as recited in claim 1, wherein:

at least a first of the at least one light source comprises at least a second light emitter and a third light emitter,

the second light emitter, when illuminated, emits light of a second color,

the third light emitter, when illuminated, emits light of a third color, and

the third color is different from the second color.

14. A light fixture comprising at least one lighting device as recited in claim 1.

15. A lighting device as recited in claim 1, wherein the light source, when illuminated, emits light which, in an absence of any additional light, has x, y color coordinates which define a point which is within a sub-area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third and fourth line segments, the first line segment connecting a first point to a second point, the second line segment connecting the second point to a third point, the third line segment connecting the third point to a fourth point, the fourth line segment connecting the fourth point to the first point, the first point having x, y coordinates of 0.32, 0.40, the second point having x, y coordinates of 0.36, 0.48, the third point having x, y coordinates of 0.41, 0.455, and the fourth point having x, y coordinates of 0.36, 0.38.

16. A lighting device comprising:

at least one light source which, when illuminated, emits light which, in an absence of any additional light, has x, y color coordinates which define a point which is within a second area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, the first line segment connecting a first point to a second point, the second line segment connecting the second point to a third point, the third line segment connecting the third point to a fourth point, the fourth line segment connecting the fourth point to a fifth point, and the fifth line segment connecting the fifth point to the first point, the first point having x, y coordinates of 0.29, 0.36, the second point having x, y coordinates of 0.32, 0.35, the third point having x, y coordinates of 0.41, 0.43, the fourth point having x, y coordinates of 0.44, 0.49, and the fifth point having x, y coordinates of 0.38, 0.53; and

a first group of solid state light emitters, the first group of solid state light emitters comprising at least a first solid state light emitter, each of the first group of light emitters, when illuminated, emits light having a dominant emission wavelength in the range of from about 600 nm to about 630 nm.

17. A lighting device as recited in claim 16, wherein each of the first group of light emitters, when illuminated, emits light having a dominant emission wavelength in the range of from about 602 nm to about 615 nm.

18. A lighting device as recited in claim 16, wherein each of the first group of light emitters, when illuminated, emits light having a dominant emission wavelength in the range of from about 611 nm to about 615 nm.

19. A lighting device as recited in claim 16, wherein each of the first group of light emitters, when illuminated, emits light having a dominant emission wavelength in the range of from about 605 nm to about 615 nm.

20. A lighting device as recited in claim 16, wherein each of the first group of light emitters, when illuminated, emits light having a dominant emission wavelength in the range of from about 610 nm to about 615 nm.

21. A lighting device as recited in claim 16, wherein each of the first group of light emitters, when illuminated, emits light having a dominant emission wavelength in the range of from about 612 nm to about 615 nm.

22. A lighting device as recited in claim 16, wherein when the at least one light source is illuminated and the first group of solid state light emitters is illuminated,

a mixed illumination of (a) light exiting the lighting device which was emitted by the at least one light source and (b) light exiting the lighting device which was emitted by the first group of solid state light emitters has x, y coordinates on a 1931 CIE Chromaticity Diagram which define a point which is within 10 MacAdam ellipses of at least one point on the blackbody locus on a 1931 CIE Chromaticity Diagram.

23. A lighting device as recited in claim 22, wherein the mixed illumination has a CRI of at least 70 and the lighting device has a wall plug efficiency of at least 70 lumens per waft.

24. A lighting device as recited in claim 16, wherein:

at least a first of the at least one light source comprises a second group of solid state light emitters and at least a first luminescent material,

the second group of solid state light emitters includes at least a second solid state light emitter;

each of the second group of solid state light emitters, when illuminated, emits light having a peak emission wavelength in the range of from 400 μ

m to 480 μ

m; and

the first luminescent material, when excited, emits light having a dominant emission wavelength in the range of from about 555 nm to about 585 nm.

25. A lighting device as recited in claim 24, wherein:

if each of the second group of solid state light emitters is illuminated, a combination of (1) light exiting the lighting device which was emitted by the second group of solid state light emitters, and (2) light exiting the lighting device which was emitted by the first luminescent material would, in an absence of any additional light, produce a mixed illumination which defines a point which is within the first area.

26. A lighting device as recited in claim 24, wherein each of the second group of solid state light emitters, when illuminated, emits light having a peak emission wavelength in the range of from 430 nm to 480 nm.

27. A lighting device as recited in claim 16, wherein:

at least a first of the at least one light source comprises a white light source and a filter,

the white light source emits white light source light that has x, y coordinates on a 1931 CIE Chromaticity Diagram which define a point which is within 10 MacAdam ellipses of at least one point on the blackbody locus on a 1931 CIE Chromaticity Diagram, and

the filter removes at least some light from the white light source light to form light which, in an absence of any additional light, has x, y color coordinates which define a point which is within the first area on a 1931 CIE Chromaticity Diagram enclosed by the first, second, third, fourth and fifth line segments.

28. A lighting device as recited in claim 16, wherein:

at least a first of the at least one light source comprises at least a second light emitter and a third light emitter,

the second light emitter, when illuminated, emits light of a second color,

the third light emitter, when illuminated, emits light of a third color, and

the third color is different from the second color.

29. A light fixture comprising at least one lighting device as recited in claim 16.

30. A lighting device as recited in claim 16, wherein the light source, when illuminated, emits light which, in an absence of any additional light, has x, y color coordinates which define a point which is within a sub-area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third and fourth line segments, the first line segment connecting a first point to a second point, the second line segment connecting the second point to a third point, the third line segment connecting the third point to a fourth point, the fourth line segment connecting the fourth point to the first point, the first point having x, y coordinates of 0.32, 0.40, the second point having x, y coordinates of 0.36, 0.48, the third point having x, y coordinates of 0.41, 0.455, and the fourth point having x, y coordinates of 0.36, 0.38.

31. A lighting device comprising:

at least one light source which, when illuminated, emits light which, in an absence of any additional light, has x, y color coordinates which define a point which is within a first area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, the first line segment connecting a first point to a second point, the second line segment connecting the second point to a third point, the third line segment connecting the third point to a fourth point, the fourth line segment connecting the fourth point to a fifth point, and the fifth line segment connecting the fifth point to the first point, the first point having x, y coordinates of 0.32, 0.40, the second point having x, y coordinates of 0.36, 0.48, the third point having x, y coordinates of 0.43, 0.45, the fourth point having x, y coordinates of 0.42, 0.42, and the fifth point having x, y coordinates of 0.36, 0.38;

a first group of solid state light emitters, the first group of solid state light emitters comprising at least a first solid state light emitter, each of the first group of light emitters, when illuminated, emitting light having a dominant emission wavelength in the range of from about 600 nm to about 630 nm; and

at least a first power line, each of the at least one light source and each of the first group of solid state light emitters being electrically connected to the first power line,

wherein;

if current is supplied to the first power line, a combination of (1) light exiting the lighting device which was emitted by the at least one light source, and (2) light exiting the lighting device which was emitted by the first group of solid state light emitters would, in an absence of any additional light, produce a mixed illumination which defines a point which is within 10 MacAdam ellipses of at least one point on the blackbody locus on a 1931 CE Chromaticity Diagram.

32. A lighting device comprising:

at least one light source which, when illuminated, emits light which, in an absence of any additional light, has x, y color coordinates which define a point which is within a second area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, the first line segment connecting a first point to a second point, the second line segment connecting the second point to a third point, the third line segment connecting the third point to a fourth point, the fourth line segment connecting the fourth point to a fifth point, and the fifth line segment connecting the fifth point to the first point, the first point having x, y coordinates of 0.29, 0.36, the second point having x, y coordinates of 0.32, 0.35, the third point having x, y coordinates of 0.41, 0.43, the fourth point having x, y coordinates of 0.44, 0.49, and the fifth point having x, y coordinates of 0.38, 0.53;

a first group of solid state light emitters, the first group of solid state light emitters comprising at least a first solid state light emitter, each of the first group of light emitters, when illuminated, emitting light having a dominant emission wavelength in the range of from about 600 nm to about 630 nm; and

at least a first power line, each of the at least one light source and each of the first group of solid state light emitters being electrically connected to the first power line,

wherein;

if current is supplied to the first power line, a combination of (1) light exiting the lighting device which was emitted by the at least one light source, and (2) light exiting the lighting device which was emitted by the first group of solid state light emitters would, in an absence of any additional light, produce a mixed illumination which defines a point which is within 10 MacAdam ellipses of at least one point on the blackbody locus on a 1931 CIE Chromaticity Diagram.

33. A method comprising:

illuminating at least one light source to emit light which, in an absence of any additional light, has x, y color coordinates which define a point which is within a first area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, the first line segment connecting a first point to a second point, the second line segment connecting the second point to a third point, the third line segment connecting the third point to a fourth point, the fourth line segment connecting the fourth point to a fifth point, and the fifth line segment connecting the fifth point to the first point, the first point having x, y coordinates of 0.32, 0.40, the second point having x, y coordinates of 0.36, 0.48, the third point having x, y coordinates of 0.43, 0.45, the fourth point having x, y coordinates of 0.42, 0.42, and the fifth point having x, y coordinates of 0.36, 0.38; and

illuminating a first group of solid state light emitters, the first group of solid state light emitters comprising at least one solid state light emitter, to emit light having a wavelength in the range of from about 600 nm to about 630 nm.

34. A method as recited in claim 33, wherein a mixed illumination of (a) light emitted by the at least one light source and (b) light emitted by the first group of solid state light emitters has x, y coordinates on a 1931 CIE Chromaticity Diagram which define a point which is within 10 MacAdam ellipses of at least one point on the blackbody locus on a 1931 CIE Chromaticity Diagram.

35. A method as recited in claim 34, wherein the mixed illumination has a correlated color temperature of not greater than 5000 K.

36. A method as recited in claim 34, wherein the mixed illumination has a CRI of at least 70 and the mixed illumination is emitted at a wall plug efficiency of at least 70 lumens per watt.

37. A method comprising:

illuminating at least one light source to emit light which, in an absence of any additional light, has x, y color coordinates which define a point which is within a second area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, the first line segment connecting a first point to a second point, the second line segment connecting the second point to a third point, the third line segment connecting the third point to a fourth point, the fourth line segment connecting the fourth point to a fifth point, and the fifth line segment connecting the fifth point to the first point, the first point having x, y coordinates of 0.29, 0.36, the second point having x, y coordinates of 0.32, 0.35, the third point having x, y coordinates of 0.41, 0.43, the fourth point having x, y coordinates of 0.44, 0.49, and the fifth point having x, y coordinates of 0.38, 0.53; and

illuminating a first group of solid state light emitters, the first group of solid state light emitters comprising at least one solid state light emitter, to emit light having a wavelength in the range of from about 600 nm to about 630 nm.

38. A method as recited in claim 37, wherein a mixed illumination of (a) light emitted by the at least one light source and (b) light emitted by the first group of solid state light emitters has x, y coordinates on a 1931 CIE Chromaticity Diagram which define a point which is within 10 MacAdam ellipses of at least one point on the blackbody locus on a 1931 CIE Chromaticity Diagram.

39. A method as recited in claim 38, wherein the mixed illumination has a correlated color temperature of not greater than 5000 K.

40. A method as recited in claim 38, wherein the mixed illumination has a CRI of at least 70 and the mixed illumination is emitted at a wall plug efficiency of at least 70 lumens per watt.