Light Source, Solid State Light Emitting Element Module, Fluorescent Module, Light Orientation Element Module, Illumination Device, Image Display Device, and Light Source Adjustment Method

• US 20100141172A1
• Filed: 02/13/2006
• Published: 06/10/2010
• Est. Priority Date: 02/14/2005
• Status: Abandoned Application

• Current Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Original Assignee: Mitsubishi Chemical Corporation (Mitsubishi Chemical Group Corp.)
• Inventors: Uchida, Yuji, Tsunemasa, Taguchi, Kijima, Naoto
• Application Number:
  US11/884,315
• Publication Number:
  US 20100141172A1
• Time in Patent Office: Days
• US Class Current: 315/294
• 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 13/14 the elements being filters or photoluminescent elements, reflectors and refractors
• CPC Class Codes: F21V 14/08 by movement of the screens or filters
• CPC Class Codes: F21V 5/10 comprising photoluminescent material
• CPC Class Codes: F21V 9/02 for simulating daylight F21V9/04, F21V9/06 take precedence
• CPC Class Codes: F21V 9/32 characterised by the arrangement of the photoluminescent material
• CPC Class Codes: F21V 9/38 Combination of two or more photoluminescent elements of different materials
• CPC Class Codes: F21V 9/45 by adjustment of photoluminescent elements
• 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 33/50 Wavelength conversion elements
• CPC Class Codes: H05B 45/20 Controlling the colour of the light

Abstract

An object of the present invention is to make possible irradiating a desired irradiated surface with a homogenized-colored light having high color rendering, with high luminous efficiency. To achieve the object, the present invention provides a light source comprising two or more primary light sources, each of which emits primary light having different wavelength, wherein the maximum value among differences between each of CIE chromaticity coordinates of the primary lights is 0.05 or larger, the primary lights have the same illuminance distribution characteristics at a desired irradiated surface, the luminous efficiency is 30 lm/W or larger, and the general color rendering index is 60 or larger.

Claims

1. A light source comprising two or more primary light sources, each of which emits primary light having different wavelength, for emitting synthesized light which is synthesized from the primary lights emitted from said primary light sources, wherein

the maximum value among differences between each of CIE chromaticity coordinates of the primary lights is 0.05 or larger,

the primary lights have the same illuminance distribution characteristics to the extent that the color of the synthesized light is homogenized at a desired irradiated surface,

the luminous efficiency is 30 lm/W or larger, and

the general color rendering index is 60 or larger.

2. A light source as defined in claim 1, wherein each of said two or more primary light sources comprises a light-emitting solid device emitting light having different wavelength from each other.

3. A light source as defined in claim 1, wherein at least one of said two or more primary light sources comprises a light-emitting solid device and a phosphor section including a phosphor absorbing light from the light-emitting solid device and emitting light.

4. A light source as defined in any one of claims 1 to 3, wherein a spread angle of the primary lights emitted from said primary light sources is between 5°

and 180°

inclusive.

5. A light source as defined in any one of claims 1 to 4, wherein each of said primary light sources comprises a illuminance-distribution controlling element.

6. A light source as defined in claim 5, wherein the illuminance-distribution controlling element has the capability of collecting the primary lights.

7. A light source as defined in any one of claims 1 to 6, wherein the color of the synthesized light is white, when observed from a distance of at least 2.5 m.

8. A light-emitting solid device module for constituting said light source as defined in claim 2 or 3, comprising:

a base; and

the light-emitting solid device disposed on said base.

9. A phosphor module for constituting said light source as defined in claim 3, comprising:

a base; and

the phosphor section disposed on said base.

10. A illuminance-distribution element module for constituting said light source as defined in claim 5 or 6, comprising:

a base; and

the illuminance-distribution controlling element disposed on said base.

13. A lighting system comprising a light source as defined in any one of claims 1 to 7, 11, and 12.

14. A display comprising a light source as defined in any one of claims 1 to 7, 11, and 12.

11. A light source comprising two or more primary light sources, each of which emits primary light having different wavelength, for emitting synthesized light which is synthesized from the primary lights emitted from said primary light sources, wherein

the maximum value among differences between each of CIE chromaticity coordinates of the primary lights is 0.05 or larger, and

the primary lights have the same illuminance-distribution characteristics to the extent that the color of the synthesized light is homogenized at a desired irradiated surface, and

said light source further comprising:

a primary-light controller capable of controlling at least a part of the amount of the primary lights by controlling said primary light sources.

12. A light source as defined in claim 11, wherein at least one of said primary light sources comprises a light-emitting solid device, and

the primary-light controller controls the amount of light emitted from the light-emitting solid device.

15. A method for controlling light emitted from a light source comprising two or more primary light sources, each of which emits primary light having different wavelength, for emitting synthesized light which is synthesized from the primary lights emitted from said primary light sources, comprising the step of:

replacing said primary light source in a manner that the maximum value among differences between each of CIE chromaticity coordinates of the primary lights is kept to be 0.05 or larger and the primary lights are kept to have the same illuminance distribution characteristics to the extent that the color of the synthesized light is homogenized at a desired irradiated surface.

16. A method for controlling light emitted from a light source comprising two or more primary light sources, each of which comprises light-emitting solid device and emits primary light having different wavelength, for emitting synthesized light which is synthesized from the primary lights emitted from said primary light sources, comprising the step of:

controlling the amount of the primary lights in a manner that the maximum value among differences between each of CIE chromaticity coordinates of the primary lights is kept to be 0.05 or larger and the primary lights are kept to have the same illuminance distribution characteristics to the extent that the color of the synthesized light is homogenized at a desired irradiated surface.