Lighting device having groups of solid state light emitters, and lighting arrangement
First Claim
1. A lighting device comprising:
- a first group of solid state light emitters;
a second group of solid state light emitters; and
a third group of solid state light emitters,the first group of solid state light emitters comprising at least one light emitting diode, each light emitting diode in the first group of solid state light emitters emitting light having a dominant wavelength within a range of from about 430 nm to about 490 nm,each solid state light emitter in the second group of solid state light emitters comprising a light emitting diode and at least one luminescent material,each solid state light emitter in the second group of solid state light emitters emitting light having a dominant wavelength in the range of from about 525 nm to about 575 nm,the third group of solid state light emitters comprising at least one light emitting diode, each light emitting diode in the third group of solid state light emitters emitting light having a dominant wavelength within a range of from about 610 nm to about 640 nm,the lighting device configured to change current supplied to at least one light emitting diode selected from among the first group of solid state light emitters, the third group of solid state light emitters, and the light emitting diodes in the second group of solid state light emitters by an amount that is not proportional to a change in current supplied to at least one other light emitting diode selected from among the first group of solid state light emitters, the third group of solid state light emitters, and the light emitting diodes in the second group of solid state light emitters.
2 Assignments
0 Petitions
Accused Products
Abstract
A lighting device comprising first, second and third groups of solid state light emitters, the first group emitting light having a dominant wavelength of 430 to 490 nm, the second group at 525 to 575 (in some devices 540 to 575 nm), the third group at 610 to 640 nm. In some devices, wavelength of light from emitters in first and second groups, and light from second and third groups, differs by at least 70 nm. Some devices emit light having CRI Ra of at least 70 when first, second and third groups of emitters are illuminated. Also, a lighting arrangement comprising first, second and third groups as above, in addition to a fourth emitter emitting light of dominant wavelength outside the ranges for the first, second and third groups, and not more than 10 nm different from a dominant wavelength of a color on an item to be illuminated.
61 Citations
26 Claims
-
1. A lighting device comprising:
-
a first group of solid state light emitters; a second group of solid state light emitters; and a third group of solid state light emitters, the first group of solid state light emitters comprising at least one light emitting diode, each light emitting diode in the first group of solid state light emitters emitting light having a dominant wavelength within a range of from about 430 nm to about 490 nm, each solid state light emitter in the second group of solid state light emitters comprising a light emitting diode and at least one luminescent material, each solid state light emitter in the second group of solid state light emitters emitting light having a dominant wavelength in the range of from about 525 nm to about 575 nm, the third group of solid state light emitters comprising at least one light emitting diode, each light emitting diode in the third group of solid state light emitters emitting light having a dominant wavelength within a range of from about 610 nm to about 640 nm, the lighting device configured to change current supplied to at least one light emitting diode selected from among the first group of solid state light emitters, the third group of solid state light emitters, and the light emitting diodes in the second group of solid state light emitters by an amount that is not proportional to a change in current supplied to at least one other light emitting diode selected from among the first group of solid state light emitters, the third group of solid state light emitters, and the light emitting diodes in the second group of solid state light emitters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A lighting device comprising:
-
a first group of solid state light emitters; a second group of solid state light emitters; and a third group of solid state light emitters, the first group of solid state light emitters comprising at least one light emitting diode, each light emitting diode in the first group of solid state light emitters emitting light having a dominant wavelength within a first range, the second group of solid state light emitters comprising at least one light emitting diode, each light emitting diode in the second group of solid state light emitters emitting light having a dominant wavelength within a second range, each dominant wavelength value within the second range differing from each dominant wavelength value within the first range; and the third group of solid state light emitters comprising at least one solid state light emitter, each solid state light emitter in the third group of solid state light emitters emitting light having a dominant wavelength within a third range, each dominant wavelength value within the third range differing from each dominant wavelength value within the first range and each dominant wavelength value within the second range, each solid state light emitter in the third group of solid state light emitters comprising a light emitting diode and at least one luminescent material, the lighting device configured to change current supplied to at least one light emitting diode selected from among the first group of light emitting diodes, the second group of light emitting diodes, and the light emitting diodes in the third group of solid state light emitters by an amount that is not proportional to a change in current supplied to at least one other light emitting diode selected from among the first group of light emitting diodes, the second group of light emitting diodes, and the light emitting diodes in the third group of solid state light emitters. - View Dependent Claims (15, 16, 17, 18)
-
-
19. A lighting device comprising:
-
a first group of solid state light emitters; a second group of solid state light emitters, and a third group of solid state light emitters, the first group of solid state light emitters comprising at least one light emitting diode, each light emitting diode in the first group of solid state light emitters emitting light having a dominant wavelength within a first range, the third group of light emitting diodes comprising at least one light emitting diode, each light emitting diode in the third group of light emitting diodes emitting light having a dominant wavelength within a second range, each dominant wavelength value within the second range differing from each dominant wavelength value within the first range; and the second group of solid state light emitters comprising at least one solid state light emitter, each solid state light emitter in the second group of solid state light emitters emitting light having a dominant wavelength within a third range, each dominant wavelength value within the third range differing from each dominant wavelength value within the first range and each dominant wavelength value within the second range, each solid state light emitter in the second group of solid state light emitters comprising a light emitting diode and at least one luminescent material, each solid state light emitter in the second group of solid state light emitters has a dominant wavelength that;
(1) differs from a dominant wavelength of each light emitting diode in the first group of solid state light emitters by at least 70 nm, (2) differs from a dominant wavelength of each light emitting diode in the third group of light emitting diodes by at least 70 nm, or (3) differs from a dominant wavelength of each light emitting diode in the first and third groups of solid state light emitters,the lighting device configured to change current supplied to at least one light emitting diode selected from among the light emitting diodes in the first group of solid state light emitters, the light emitting diodes in the second group of solid state light emitters, and the light emitting diodes in the third group of solid state light emitters by an amount that is not proportional to a change in current supplied to at least one other light emitting diode selected from among the light emitting diodes in the first group of solid state light emitters, the light emitting diodes in the second group of solid state light emitters, and the light emitting diodes in the third group of solid state light emitters. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
-
Specification