LIGHTING DEVICES, METHODS OF LIGHTING, LIGHT FILTERS AND METHODS OF FILTERING LIGHT

• US 20080259589A1
• Filed: 02/22/2008
• Published: 10/23/2008
• Est. Priority Date: 02/22/2007
• Status: Active Grant

• Current Assignee: IDEAL Industries Lighting, LLC (Ideal Industries Incorporated)
• Original Assignee: LED Lighting Fixtures, Inc. (Wolfspeed, Inc.)
• Inventors: VAN DE VEN, Antony Paul
• Granted Patent: US 8,506,114 B2
• Time in Patent Office: Days
• US Class Current: 362/84
• 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: F21V 7/24 characterised by the material
• CPC Class Codes: F21V 9/08 for producing coloured light, e.g. monochromatic; for reducing intensity of light with provision for controlling the colour F21V9/40
• CPC Class Codes: F21W 2131/401 for swimming pools
• 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 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 2924/13091 Metal-Oxide-Semiconductor Field-Effect Transistor [MOSFET]
• CPC Class Codes: H01L 2924/181 Encapsulation
• CPC Class Codes: H01L 33/44 characterised by the coatings, e.g. passivation layer or anti-reflective coating
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H05B 45/20 Controlling the colour of the light

Abstract

A lighting device comprising a white light source, a filter which filters blue light from the white light, and a second light source which emits red light and/or reddish-orange light. In some embodiments, the white light source comprises a solid state light emitter. A method of lighting, comprising illuminating a white light source, illuminating a red and/or reddish-orange light source, the light sources being positioned and oriented such that the light mixes, and filtering blue light from the mixed light. A method of lighting, comprising illuminating a white light source, filtering blue light from the white light, and illuminating a red and/or reddish-orange light source. A light filter, comprising a first filter component which has a wall region and a window region, and a second filter component comprising two or more reflection regions. Also, methods of filtering.

Claims

1. A lighting device comprising:

a first light source which, if illuminated, emits white light;

a first filter which, if contacted by said white light emitted from said first light source, would filter at least some blue light from said white light to form modified light; and

a second light source which, if illuminated, emits light of at least one color selected from among the group consisting of red light and reddish-orange light.

2. A lighting device as recited in claim 1, wherein said lighting device further comprises a third light source which, if illuminated, emits white light.

5. A lighting device as recited in claim 1, wherein said modified light, in the absence of any additional light, has x, y color coordinates which define a point which is within an area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, said first line segment connecting a first point to a second point, said second line segment connecting said second point to a third point, said third line segment connecting said third point to a fourth point, said fourth line segment connecting said fourth point to a fifth point, and said fifth line segment connecting said fifth point to said first point, said first point having x, y coordinates of 0.32, 0.40, said second point having x, y coordinates of 0.36, 0.48, said third point having x, y coordinates of 0.43, 0.45, said fourth point having x, y coordinates of 0.42, 0.42, and said fifth point having x, y coordinates of 0.36, 0.38.

7. A lighting device as recited in claim 5, wherein a mixture of light consisting of said modified light and light emitted from said second light source would produce mixed light said mixed light having x, y coordinates on a 1931 CIE Chromaticity Diagram which define a point which is within ten 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 1, wherein:

said lighting device further comprises a power line, said first light source and said second light source are electrically connected to said power line, and

if current is supplied to said power line, a combination of (1) light exiting said lighting device which was emitted by said first light source and (2) light exiting said lighting device which was emitted by said second light source would, in an absence of any additional light, produce mixed light, said mixed light being white light.

12. A lighting device as recited in claim 1, wherein said first light source comprises:

at least one first group light emitter, each of said first group light emitters comprising at least one first group solid state light emitter, each of said first group light emitters, if activated, emitting light of a first color; and

at least one second group light emitter, each of said second group light emitters comprising at least one second group solid state light emitter and at least one second group lumiphor, each of said second group light emitters, if activated, emitting light of a second color, said second color being different from said first color.

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

each of said first group light emitters comprises at least one solid state light emitter which, if illuminated, emits UV light;

each of said second group light emitters comprises at least one second group lumiphor; and

said first light source further comprises at least one third group light emitter, each of said third group light emitters, if activated, emitting light of a third color, said third color being different from said first color and said second color, each of said third group light emitters comprising at least one third group lumiphor.

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

said first light source comprises at least one first group light emitter and at least one second group light emitter, each of said first group light emitters, if activated, emitting light of a first color, each of said second group light emitters, if activated, emitting light of a second color, said second color being different from said first color,

said first group of light emitters comprises at least one solid state light emitter which, if illuminated, emits light having a peak wavelength in the range of from about 430 nm to about 480 nm; and

said second group of light emitters comprises at least one lumiphor which, if illuminated, emits light having a dominant wavelength in the range of from about 555 nm to about 585 nm.

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

said first light source comprises at least one first group light emitter and at least one second group light emitter, each of said first group light emitters, if activated, emitting light of a first color, each of said second group light emitters, if activated, emitting light of a second color, said second color being different from said first color,

each of said first group light emitters comprises at least one first group lumiphor; and

each of said second group light emitters comprises at least one second group lumiphor.

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

said first light source comprises at least one first group light emitter and at least one second group light emitter, each of said first group light emitters, if activated, emitting light of a first color, each of said second group light emitters, if activated, emitting light of a second color, said second color being different from said first color,

said first light source further comprises at least one third group light emitter, each of said third group light emitters, if activated, emitting light of a third color, said third color being different from said first color and said second color,

each of said first group light emitters comprises at least one first group lumiphor and at least one first group solid state light emitter;

each of said second group light emitters comprises at least one second group lumiphor and at least one second group solid state light emitter; and

each of said third group light emitters comprises at least one third group lumiphor and at least one third group solid state light emitter.

26. A lighting device as recited in claim 24, wherein

each of said first group lumiphors, if excited, emits blue light;

each of said second group lumiphors, if excited, emits green light;

each of said third group lumiphors, if excited, emits red light;

each of said first group solid state light emitters, if excited, emits blue light;

each of said second group solid state light emitters if excited, emits green light; and

each of said third group solid state light emitters, if excited, emits red light.

27. A lighting device as recited in claim 24, wherein each of said first group lumiphors, if excited, emits blue light;

each of said second group lumiphors, if excited, emits light of at least one color selected from among the group consisting of yellowish-green light, yellow-green light, greenish-yellow light and yellow light;

each of said third group lumiphors, if excited, emits red light;

each of said first group solid state light emitters, if excited, emits blue light;

each of said second group solid state light emitters, if excited, emits light of at least one color selected from among the group consisting of yellowish-green light, yellow-green light, greenish-yellow light and yellow light; and

each of said third group solid state light emitters, if excited, emits red light.

34. A lighting device as recited in claim 1, wherein said first filter, if contacted by said white light emitted from said first light source, would filter at least some blue light and at least some yellow light from said white light to form said modified light.

35. A lighting device as recited in claim 1, wherein said first filter is a pass-through filter.

36. A lighting device as recited in claim 1, wherein said first filter is a reflection filter.

37. A lighting device as recited in claim 1, wherein said first filter comprises at least a first filter component and a second filter component,

said first filter component comprising at least a first wall region, said first wall region comprising at least one window region,

said second filter component comprising at least a first reflection region and a second reflection region,

wherein said first reflection region, if contacted by a first mixture of light which is white, would reflect a first reflected light which differs in color from a second reflection light which would be reflected by said second reflection region if said second reflection region were contacted by said first mixture of light,

at least one of said first filter component and said second filter component being movable such that differing portions of said first reflection region can be exposed through said window region, such that if said first mixture of light enters said filter, a color of light exiting said filter can be adjusted by adjusting a positional relationship between said first filter component and said second filter component.

43. A lighting device as recited in claim 1, wherein said white light has a color temperature of at least 4,000K.

47. A lighting device as recited in claim 1, wherein said first filter, if contacted by said white light emitted from said first light source, would filter at least 25%, on a mW basis, of said blue light from said white light to form said modified light.

48. A lighting device as recited in claim 1, wherein said first filter, if contacted by said white light emitted from said first light source, would filter at least 25%, on a mW basis, of said blue light and at least 25%, on a mW basis, of green light from said white light to form said modified light.

3-4. -4. (canceled)

6. (canceled)

9-11. -11. (canceled)

13-16. -16. (canceled)

18-21. -21. (canceled)

25. (canceled)

28-33. -33. (canceled)

38-42. -42. (canceled)

44-46. -46. (canceled)

49. A method of lighting, comprising:

illuminating a first light source, whereby said first light source emits first light, said first light appearing white;

illuminating a second light source, whereby said second light source emits second light of at least one color selected from among the group consisting of red light and reddish-orange light,

filtering at least some blue light from said first light,

thereby producing filtered mixed light.

50. A method as recited in claim 49, wherein:

said method further comprises illuminating a third light source which emits white light.

53. A method as recited in claim 49, wherein if said first light emitted by said first light source were passed through said first filter in the absence of any additional light to form first light filtered light, said first light filtered light would have x, y color coordinates which define a point which is within an area on a 1931 CIE Chromaticity Diagram enclosed by first, second, third, fourth and fifth line segments, said first line segment connecting a first point to a second point, said second line segment connecting said second point to a third point, said third line segment connecting said third point to a fourth point, said fourth line segment connecting said fourth point to a fifth point, and said fifth line segment connecting said fifth point to said first point, said first point having x, y coordinates of 0.32, 0.40, said second point having x, y coordinates of 0.36, 0.48, said third point having x, y coordinates of 0.43, 0.45, said fourth point having x, y coordinates of 0.42, 0.42, and said fifth point having x, y coordinates of 0.36, 0.38.

55. A method as recited in claim 49, wherein said filtered mixed light has x, y coordinates on a 1931 CIE Chromaticity Diagram which define a point which is within ten MacAdam ellipses of at least one point on the blackbody locus on a 1931 CIE Chromaticity Diagram.

56. A method as recited in claim 49, wherein said first light source comprises:

at least one first group light emitter, each of said first group light emitters comprising at least one first group solid state light emitter, each of said first group light emitters emitting light of a first color; and

at least one second group light emitter, each of said second group light emitters comprising at least one second group solid state light emitter and at least one second group lumiphor, each of said second group light emitters emitting light of a second color, said second color being different from said first color.

61. A method as recited in claim 49, wherein:

said first light source comprises at least one first group light emitter and at least one second group light emitter, each of said first group light emitters emitting light of a first color, each of said second group light emitters emitting light of a second color, said second color being different from said first color;

each of said second group light emitters comprises at least one second group lumiphor;

each of said first group light emitters comprises at least one solid state light emitter which emits UV light; and

said first light source further comprises at least one third group light emitter, each of said third group light emitters emitting light of a third color, said third color being different from said first color and said second color, each of said third group light emitters comprising at least one third group lumiphor.

66. A method as recited in claim 49, wherein:

said first light source comprises at least one first group light emitter and at least one second group light emitter, each of said first group light emitters emitting light of a first color, each of said second group light emitters emitting light of a second color, said second color being different from said first color;

said first group of light emitters comprises at least one solid state light emitter which emits light having a peak wavelength in the range of from about 430 nm to about 480 nm; and

said second group of light emitters comprises at least one lumiphor which emits light having a dominant wavelength in the range of from about 555 nm to about 585 nm.

67. A method as recited in claim 49, wherein:

said first light source comprises at least one first group light emitter and at least one second group light emitter, each of said first group light emitters emitting light of a first color, each of said second group light emitters emitting light of a second color, said second color being different from said first color;

each of said first group light emitters comprises at least one first group lumiphor; and

each of said second group light emitters comprises at least one second group lumiphor.

68. A method as recited in claim 49, wherein:

said first light source comprises at least one first group light emitter and at least one second group light emitter, each of said first group light emitters emitting light of a first color, each of said second group light emitters emitting light of a second color, said second color being different from said first color;

said first light source further comprises at least one third group light emitter, each of said third group light emitters emitting light of a third color, said third color being different from said first color and said second color;

each of said first group light emitters comprises at least one first group lumiphor and at least one first group solid state light emitter;

each of said second group light emitters comprises at least one second group lumiphor and at least one second group solid state light emitter; and

each of said third group light emitters comprises at least one third group lumiphor and at least one third group solid state light emitter.

70. A method as recited in claim 68, wherein

each of said first group lumiphors emits blue light;

each of said second group lumiphors emits green light;

each of said third group lumiphors emits red light;

each of said first group solid state light emitters emits blue light;

each of said second group solid state light emitters emits green light; and

each of said third group solid state light emitters emits red light.

71. A method as recited in claim 68, wherein

each of said first group lumiphors emits blue light;

each of said second group lumiphors emits light of at least one color selected from among the group consisting of yellowish-green light, yellow-green light, greenish-yellow light and yellow light;

each of said third group lumiphors emits red light;

each of said first group solid state light emitters emits blue light;

each of said second group solid state light emitters emits light of at least one color selected from among the group consisting of yellowish-green light yellow-green light, greenish-yellow light and yellow light; and

each of said third group solid state light emitters emits red light.

78. A method as recited in claim 49, wherein said first filter filters at least some blue light and at least some yellow light from said first mixed light.

79. A method as recited in claim 49, wherein said first filter is a pass-through filter.

80. A method as recited in claim 49, wherein said first filter is a reflection filter.

81. A method as recited in claim 49, wherein said first filter comprises at least a first filter component and a second filter component,

said first filter component comprising at least a first wall region, said first wall region comprising at least one window region,

said second filter component comprising at least a first reflection region and a second reflection region,

wherein said first reflection region, if contacted by a first mixture of light which is white, would reflect a first reflected light which differs in color from a second reflection light which would be reflected by said second reflection region if said second reflection region were contacted by said first mixture of light,

at least one of said first filter component and said second filter component being movable such that differing portions of said first reflection region can be exposed through said window region, such that if said first mixture of light enters said filter, a color of light exiting said filter can be adjusted by adjusting a positional relationship between said first filter component and said second filter component.

87. A method as recited in claim 49, wherein said white light has a color temperature of at least 4,000K.

89. A method as recited in claim 49, wherein said filtered mixed light has a color temperature which is lower than a color temperature of said first light.

90. A method as recited in claim 49, wherein said first filter filters from said first light at least 25%, on a mW basis.

91. A method as recited in claim 49, wherein said first filter filters from said first light at least 25%, on a mW basis, of said blue light and at least 25%, on a mW basis, of green light.

92. A method of lighting as recited in claim 49, wherein:

said filtering at least some blue light comprises contacting said first light with a first filter which filters from said first light at least some blue light to form modified light; and

said first filter and said second light source being positioned and oriented relative to each other such that at least said modified light and said second light mix to form said filtered mixed light.

144. A method of lighting as recited in claim 49, wherein:

said first light source and said second light source are positioned and oriented relative to each other such that at least said white light and said second light mix to form first mixed light; and

said filtering at least some blue light comprises contacting said first mixed light with a first filter which filters from said first mixed light at least some blue light to form said filtered mixed light.

51-52. -52. (canceled)

54. (canceled)

57-60. -60. (canceled)

62-65. -65. (canceled)

69. (canceled)

72-77. -77. (canceled)

82-86. -86. (canceled)

88. (canceled)

93-134. -134. (canceled)

135. A light filter, comprising:

at least a first filter component and a second filter component,

said first filter component comprising at least a first wall region, said first wall region comprising at least one window region,

said second filter component comprising at least a first reflection region and a second reflection region,

wherein said first reflection region, if contacted by a first mixture of light which is white, would reflect a first reflected light which differs in color from a second reflection light which would be reflected by said second reflection region if said second reflection region were contacted by said first mixture of light,

at least one of said first filter component and said second filter component being movable such that differing portions of said first reflection region can be exposed through said window region, such that if said first mixture of light enters said filter, a color of light exiting said filter can be adjusted by adjusting a positional relationship between said first filter component and said second filter component.

136. A light filter as recited in claim 135, wherein an axis of said first filter component is substantially coaxial with an axis of said second filter component.

137. A light filter as recited in claim 135, wherein said first filter component and said second filter component each comprise regions which comprise at least a portion of a substantially frustoconical shape.

138. A light filter as recited in claim 137, wherein said first filter component and said second filter component each comprise regions which are of substantially frustoconical shape.

139. A light filter as recited in claim 135, wherein said first filter component and said second filter component each comprise regions which comprise at least a portion of a substantially cylindrical shape.

140. A light filter as recited in claim 139, wherein said first filter component and said second filter component each comprise regions which are of substantially cylindrical shape.

141. A light filter as recited in claim 135, wherein said first filter component and said second filter component each comprise regions which are substantially flat.

142. A method of lighting, comprising:

contacting light with a filter, said filter comprising at least a first filter component and a second filter component,

said first filter component comprising at least a first wall region, said first wall region comprising at least one window region,

said second filter component comprising at least a first reflection region and a second reflection region,

wherein said first reflection region, if contacted by a first mixture of light which is white, would reflect a first reflected light which differs in color from a second reflection light which would be reflected by said second reflection region if said second reflection region were contacted by said first mixture of light,

at least one of said first filter component and said second filter component being movable such that differing portions of said first reflection region can be exposed through said window region, such that a color of light exiting said filter can be adjusted by adjusting a positional relationship between said first filter component and said second filter component.

143. A method of lighting, comprising:

moving at least a first filter component of a filter relative to a second filter component of said filter,

said first filter component comprising at least a first wall region, said first wall region comprising at least one window region,

said second filter component comprising at least a first reflection region and a second reflection region,

wherein said first reflection region, if contacted by a first mixture of light which is white, would reflect a first reflected light which differs in color from a second reflection light which would be reflected by said second reflection region if said second reflection region were contacted by said first mixture of light,

at least one of said first filter component and said second filter component being movable such that differing portions of said first reflection region can be exposed through said window region, such that a color of light exiting said filter can be adjusted by adjusting a positional relationship between said first filter component and said second filter component.