ILLUMINATING DEVICE

• US 20100295464A1
• Filed: 11/12/2008
• Published: 11/25/2010
• Est. Priority Date: 11/12/2007
• Status: Active Grant

• Current Assignee: CMC Magnetics Corporation
• Original Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Inventors: Satou, Yoshihito, Kasakura, Akeo
• Granted Patent: US 8,410,714 B2
• Time in Patent Office: Days
• US Class Current: 315/287
• 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: H01L 2224/45144 Gold (Au) as principal constituent
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2224/73265 Layer and wire connectors
• 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 2924/00012 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 2924/01019 Potassium [K]
• CPC Class Codes: H01L 2924/01021 Scandium [Sc]
• CPC Class Codes: H01L 2924/01066 Dysprosium [Dy]
• CPC Class Codes: H01L 2924/01067 Holmium [Ho]
• CPC Class Codes: H01L 2924/01068 Erbium [Er]
• CPC Class Codes: H01L 2924/01322 Eutectic Alloys, i.e. obtained by a liquid transforming into two solid phases
• CPC Class Codes: H01L 2924/12044 OLED
• CPC Class Codes: H01L 2924/181 Encapsulation
• CPC Class Codes: H01L 2924/30107 Inductance
• CPC Class Codes: H01L 33/50 Wavelength conversion elements
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 47/10 Controlling the light source

Abstract

An illuminating device comprising semiconductor light-emitting devices employing a semiconductor light-emitting element, wherein outputted light is stably combined, separation of light is inhibited, and color tone is variable. Control for operating the light-emitting devices is as simple as possible. It is an illuminating device comprising a light-emitting part comprising a plurality of kinds of semiconductor light-emitting devices which differ in emission color are integrated and arranged, the semiconductor light-emitting devices comprising a semiconductor light-emitting element and a phosphor, and wherein the semiconductor light-emitting devices emit light outward on the basis of an emission from the semiconductor light-emitting element and an emission from the phosphor which is excited by said emission from the semiconductor light-emitting element to fluoresce or on the basis of an emission from the phosphor which is excited by an emission from the semiconductor light-emitting element to fluoresce, wherein the semiconductor light-emitting devices each have an emission color, the deviation duv of which from a blackbody radiation locus being within a range of −0.02≦duv≦0.02, in the uv chromaticity diagram according to UCS (u,v) color system (CIE 1960), and outputted lights from the light-emitting part in which the plurality of kinds of the semiconductor light-emitting devices are integrated and arranged, are mixed together and emitted outward.

Claims

1. An illuminating device comprising:

a first to an Nth solid-state light-emitting device, wherein;

N is an integer equal to or greater than two;

first to Nth solid-state light-emitting devices differ in emission color, and each comprises a semiconductor light-emitting element and a phosphor and emits a primary light on the basis of an emission from the semiconductor light-emitting element and an emission from the phosphor which is excited by said emission from the semiconductor light-emitting element to fluoresce, or on the basis of an emission from the phosphor which is excited by an emission from the semiconductor light-emitting element to fluoresce;

the first to Nth solid-state light-emitting devices each have an emission color, the deviation duv of which from a blackbody radiation locus being within a range of −

0.02≦

duv≦

0.02, in the uv chromaticity diagram according to USC (u,v) color system (CIE

     1960); and

a synthesized light which is synthesized from primary lights emitted by the first to Nth solid-state light-emitting devices is emitted outward.

2. The illuminating device according to claim 1, wherein the semiconductor light-emitting element has an emission peak wavelength in a range of 350 nm to 430 nm or less.

3. The illuminating device according to claim 1, wherein at least one solid-state light-emitting device among the first to Nth solid-state light-emitting devices has a positive value of the deviation duv of an emission color.

4. The illuminating device according to claim 1, further comprising

an emission intensity control part which controls electric power supplied to each of the first to Nth solid-state light-emitting devices and thereby controls a color of the synthesized light.

5. The illuminating device according to claim 4,

wherein the emission intensity control part controls a correlated color temperature of the synthesized light by controlling electrical power supplied to the first to Nth solid-state light-emitting devices in order to change a predetermined amount of a reciprocal correlated color temperature of the synthesized light.

7. The illuminating device according to claim 4,

wherein the emission intensity control part controls the electric power supplied to the first to Nth solid-state light-emitting devices by reciprocal correlated color temperature of the synthesized light.

8. The illuminating device according to claim 7, further comprising

a request reception part, which receives a request from a user for regulation of correlated color temperatures of the synthesized light through a change in a given parameter amount associated with the correlated color temperatures, and wherein

the emission intensity control part controls the electric power supplied to the first to Nth solid-state light-emitting devices by reciprocal correlated color temperatures so that the given parameter in the request for regulation received by the request reception part changes in proportion to a change in the correlated color temperature of the synthesized light.

9. The illuminating device according to claim 4, wherein

N is two, and the emission intensity control part controls each the first to Nth solid-state light-emitting devices to regulate the emission color of the synthesized light so as to result in a chromaticity point, which is located on straight lines connecting two chromaticity points respectively corresponding to the emission colors of the lights from the first to Nth solid-state light-emitting devices.

10. The illuminating device according to claim 4, wherein

the emission intensity control part supplies the electric power to the first to Nth solid-state light-emitting devices with a PWM control to control correlated color temperature of the synthesized light.

11. The illuminating device according to claim 4, further comprising

a circuit in which n1th and n2th solid-state light-emitting devices, which are selected from the first to Nth solid-state light-emitting devices are parallel-connected so as to have forward bias directions opposite from each other, wherein

n1 and n2 are integers of 1 or more and N or less, respectively, and n1 is not equal to n2, and

the emission intensity control part applies an alternating-current voltage having a square waveform to the circuit and controls a duty ratio of the alternating-current voltage having a square waveform.

12. The illuminating device according to claim 1, wherein the first to Nth solid-state light-emitting devices comprises, as the phosphor, a blue phosphor, which emits a blue florescence upon excitation by an emission from the semiconductor light-emitting element, a green phosphor, which emits a green florescence upon excitation by an emission from the semiconductor light-emitting element, and a red phosphor, which emits a red florescence upon excitation by an emission from the semiconductor light-emitting element.

13. The illuminating device according to claim 1, wherein the first to Nth light-emitting devices further comprise a light-transmitting material which encapsulates the semiconductor light-emitting element and the phosphor.

14. The illuminating device according to claim 13, wherein the light-transmitting material is a silicon-comprising compound.

15. The illuminating device according to claim 1, wherein the emission color of the first to Nth light-emitting devices device has a correlated color temperature in a range of 2,000K to 50,000K.

27. The illuminating device according to claim 1, wherein the correlated color temperature of the synthesized light is variable within a range of 3,000K to 6,500K, and when the correlated color temperature is changed from 3,000K to 6,500K, an absolute value of a percentage change in the emission intensity is 10% or less in the wavelength range of the wavelength of a spectrum of the synthesized light of 540 to 560 nm.

28. The illuminating device according to claim 4, wherein

N is three or more, and the emission intensity control part controls each of the first to Nth solid-state light-emitting devices to regulate the color of the synthesized light so as to result in a chromaticity point, which is located within a polygon formed by the straight lines connecting a plurality of chromaticity points respectively corresponding to emission colors of lights from the first to Nth solid-state light-emitting devices.

6. (canceled)

16. An illuminating device comprising a light-emitting module comprising:

at least a package;

a semiconductor light-emitting element having an emission peak wavelength in the range of 350 nm or more to 430 nm or less; and

a phosphor,

wherein the light-emitting module emits light outward on the basis of an emission from the semiconductor light-emitting element and an emission from the phosphor, which is excited by said emission from the semiconductor light-emitting element to fluoresce, or on the basis of an emission from the phosphor which is excited by an emission from the semiconductor light-emitting element to fluoresce,

wherein the package has an opening which is open in an emission direction for the light-emitting module and a plurality of divided regions demarcated by partitioning the inside of the package, each of the divided regions being open at a divided opening which is a part of said opening,

wherein each of the plurality of the divided regions comprises;

one or more of the semiconductor light-emitting elements;

a power supply part which supplies electric power to the semiconductor light-emitting element; and

a fluorescent part comprising the phosphor and a light-transmitting material, which fills up the divided region, and

wherein, among the plurality of the divided regions, at least one divided region is different from at least one other divided region in a spectrum of a primary light from the fluorescent part, wherein each of the primary light has an emission color, the deviation duv of which from a blackbody radiation locus is within a range of −

0.02≦

duv≦

0.02, in the uv chromaticity diagram according to UCS (u,v) color system (CIE

     1960), and wherein a synthesized light which is synthesized from each of the primary light from said at least one divided region and the primary light from said at least one other divided region is emitted outward.

17. The illuminating device according to claim 16, which further comprises an emission intensity control part which controls, through the power supply part, the electric power supplied to the semiconductor light-emitting element in each of the plurality of the divided regions and thereby independently controls the emission intensity of the primary light from each of the divided regions.

18. The illuminating device according to claim 17,

wherein the emission intensity control part controls the electric power supplied to the semiconductor light-emitting element in each of the plurality of the divided regions in order to change a predetermined amount of a reciprocal correlated color temperature of the synthesized light.

20. The illuminating device according to claim 17,

which comprises a request reception part which receives a request from a user for regulation of the correlated color temperatures of the synthesized light through a change in a given parameter amount associated with the correlated color temperatures, and

wherein the emission intensity control part controls the electric power supplied to the semiconductor light-emitting element in each of the plurality of the divided regions on the basis of the reciprocal correlated color temperatures so that the given parameter in the request for regulation received by the request reception part changes in proportion to a change in the correlated color temperature of the synthesized light.

21. The illuminating device according to claim 17,

wherein the power supply part comprises a plurality of wiring lines for supplying the electric power to the semiconductor light-emitting elements included in the plurality of the divided regions, and

wherein the emission intensity control part controls, through the plurality of the wiring lines, the electric power supplied to the semiconductor light-emitting elements, the power supply for each of the divided regions being independently controlled.

22. The illuminating device according to claim 17,

wherein the semiconductor light-emitting element comprises paired input electrodes having a polarity in the electric power supplied,

the power supply part comprises a pair of wiring lines to which the paired input electrodes are respectively connected,

the connection of the semiconductor light-emitting element in a part of the divided regions, which comprise said at least one divided region, to the wiring lines is in a polarity-inverted state with respect to the connection of the semiconductor light-emitting element in the remaining part of the divided regions, which comprises at least one other divided region to the wiring lines, and

wherein the emission intensity control part supplies an alternating-current power to the pair of wiring lines.

23. The illuminating device according to claim 22,

wherein the emission intensity control part applies an alternating-current voltage having a square waveform to the pair of wiring lines and controls a duty ratio of the alternating-current voltage having a square waveform.

24. The illuminating device according to claim 17,

wherein the emission intensity control part controls each of the plurality of the divided regions to regulate the emission color of the synthesized light so as to result in a chromaticity point, which is located on straight lines connecting a plurality of chromaticity points respectively corresponding to the emission colors of the lights from the plurality of the divided regions, or which is located within a polygon formed by the straight lines.

25. The illuminating device according to claim 16,

wherein the light-transmitting material is a silicon-comprising compound.

26. The illuminating device according to claim 16, wherein the emission color of the divided region has a correlated color temperature in a range of 2,000K to 50,000K.

19. (canceled)