WO2009046050A1 - Seven-cavity led array rgb collimation optic - Google Patents
Seven-cavity led array rgb collimation optic Download PDFInfo
- Publication number
- WO2009046050A1 WO2009046050A1 PCT/US2008/078368 US2008078368W WO2009046050A1 WO 2009046050 A1 WO2009046050 A1 WO 2009046050A1 US 2008078368 W US2008078368 W US 2008078368W WO 2009046050 A1 WO2009046050 A1 WO 2009046050A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- engine
- produce
- dispersed
- disposed
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
- G02B19/0066—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED in the form of an LED array
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0028—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed refractive and reflective surfaces, e.g. non-imaging catadioptric systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
- F21K9/68—Details of reflectors forming part of the light source
Definitions
- This invention relates to optical devices. More specifically, the present invention relates to collimated optical light source assemblies that produce a uniform white light.
- LED light engines with multi-primary emitters are known, for instance the
- the multi-cavity LED array includes seven LED cavities.
- a device in accordance with an embodiment of the present invention preferably includes uniformity and collimation features shown in FIG. 1. which may include one or more of the following: [008] 1) A multi-cavity RGB LED array 1;
- FIG. 1 is a side schematic view of one embodiment of the RGB array collimation optical assembly of the present invention
- FIG. 2 is a top view of LED cavity placement;
- Each of the 6 peripheral cavities may contain 4 light emitting diodes of different primary wavelengths.
- the center cavity may have 1 each of red green and blue or other primary direct emission light emitting diode.
- FIG. 3 is a ray trace diagram illustrating some of the light paths through the embodiment of FIG. 1 ;
- FIG. 4 is a raytracing simulation plot of the relative intensity distribution as a function of angular dispersion.
- FIG. 5 is a raytracing simulation plot of the illuminance distribution at a distance of 1 meter from the 7-cavity LED array source and optic.
- FIG. 6 is a measured beam speckle pattern for R+G+B primary colors combined in correct ratio to produce a 6500 0 K white color temperature equivalent in which the primary color combination produces approximately a white with 1931 x,y chromaticity coordinates of .3136 and .3237;
- FIG. 7 is a measured beam speckle pattern for R+G+B primary colors combined in correct ratio to produce a 4750 0 K white color temperature equivalent; in which the primary color combination produces a white with approximately 1931 x,y chromaticity coordinates in the vicinity of .3525 and .3574.
- FIG. 8 is a measured beam speckle pattern for R+G+B primary colors combined in correct ratio to produce a 2850 0 K white color temperature equivalent.
- the white chromaticity coordinates are near .4480 and .4076 respectively.
- the reflecting cavity 2, lenslet array 3, cone lens 4 and reflector 5 are collectively referred to herein as the collimation optic.
- the collimation optic is used to decrease the intensity dispersion of a multi-cavity wide beam, e.g., 60 degree primary light engine cavity 1 in which the light emitters include light emitting diodes of different primary wavelengths, and wherein 60 degree refers to the beam angle of the light collectively emitted by the light engine cavities 1.
- the multi-cavity 60 degree primary light engine may for example be the 7-cavity Lamina TitanTM light engine.
- a light engine with other than 7 cavities may also be used, so long as the beam angle of the emitted light, prior to any collimation optics, is approximately 60 degrees and the field angle is approximately 100 degrees.
- Light exiting the LED array 1 disperses at approximately a 60 degree beam angle.
- the light then proceeds to reflecting cavity 2 which preferably has a barrel spline shape or elliptical cross-sectional shape with truncated entrance and exit planes.
- This desired cross-sectional shape is matched to the 60 degree beam width of the LED array 1, and produces the greatest on-axis light intensity.
- deviations from this cross-sectional shape are usable but will produce a reduced on- axis light intensity. For example, a deviation of 5% RMS from the prescribed cross- sectional shape can produce a 20% reduction in on-axis intensity.
- the reflecting cavity 2 has symmetry around the optical axis.
- the interior surface of the reflector cavity 2 has a Lambertian texture. Intensity of light reflected from the interior of reflector cavity 2 varies with the cosine of the angle with respect to normal or 0 degree dispersion. A Lambertian scatterer redirects light with constant luminance when viewed at any angle. The Lambertian scatter texture randomizes the light of the primary colors in such a manner that light will emerge from the top of the reflector cavity 2 at an approximately equal intensity in all radial angles around the axis of rotation of the reflector cavity 2.
- AMODELTM polyphthalamide (PPA) from Solvay Advanced Polymers or equivalent can be molded into the desired cross-sectional shape with high reflectivity, and including the Lambertian scatter texture. Some loss is incurred in the randomization scatter process as such the enhancement of color uniformity has a trade-off. For example, although the Lambertian scatter texture of the reflector randomizes the light fields of the primary colors, it also directs light back towards the source which is undesirable. A reflector plate filling the spaces between the light cavities helps to recirculate some of this light back towards the exit aperture.
- the lenslet array 3 After scattering from the surface of the reflector cavity 2, the light passes through a lenslet array 3.
- the lenslet array 3 produces intermediate micro-images which further homogenize the light.
- the lenslet array 3 may include for instance a lenslet array as described in U.S. Patent Application Number 11/737,101 and provisional U.S. Patent Application Number 60/971,255, the entire contents of which are hereby incorporated herein in their entirety, and which are under a common obligation of assignment as with the present application.
- a revolved polynomial is the preferred cross-sectional shape for the cone- shaped lens 4 because deviations in the shape from that of a revolved polynomial will produce unwanted artifacts or holes in the intensity pattern of the beam of light, i.e., a region or zone with reduced illuminance which the eye can detect.
- a secondary lens is not recommended as the additional loss/collimation benefit ratio is too high.
- the final reflector preferably has an exit aperture which is larger than the input aperture or it will not collimate light.
- a confocal parabolic concentrator is commonly used to collimate light exiting from a finite source aperture.
- the light intensity of each of the primary color emitters may be tuned to produce a variable white color temperature from warm to cool white.
- Other colors may also be produced as contained with the chroma triangle produced by the wavelengths of the primaries.
- colors of the LED die contained within the LED array 1 may be entirely arbitrary depending on the chroma polygon required, e.g., ultraviolet or infrared LEDs, or combinations of hybrid phosphor/direct emission sources is also possible so long as the reflective materials used in the assembly are tailored to efficiently reflect those wavelengths.
- Cavities containing only diode pumped phosphor may be interspersed with direct emission monochromatic primary colors.
- This application may disclose several numerical range limitations.
- the polynomials enclosed are tailored specifically to the 60 degree intensity distribution pattern of the 7 cavity LED source array. Other ranges or variations from the polynomials disclosed may be used.
- the color uniformity enhancement features allow for the production of a tunable w r hite temperature from 2000 0 K to 8000 0 K. To produce a 6500 0 K white the approximate ratio of red, green and blue light is 50% 457nm. 26% 525nm, and 23% 625nm. To produce 4750 0 K white the approximate spectral power ratio of light is 40% 457nm. 28% 525nm, and 32% 625nm red.
Abstract
This invention relates to optical devices. More specifically, the present invention relates to a collimated optical light source assembly that produces a uniform white light. Specifically, light from a multi-cavity RGB LED array is dispersed in a reflecting cavity having a Lambertian texture on the interior surface. The light is then emitted though a lenslet array and a cone lens which together further disperses the light emitted by the individual LEDs. The dispersed light is then collimated by a reflector.
Description
SEVEN-CAVITY LED ARRAY RGB COLLIMATION OPTIC
[001] This application claims the benefit of U.S. provisional application No.
60/976,693, filed on October 1, 2007, the entire disclosure of which is incorporated by reference.
[002] References including various publications may be cited and discussed in the description of this invention. Any citation and/or discussion of such references is provided merely to clarify the description of the present invention and is not an admission that any such reference is "prior art" to the present invention. All references cited and discussed in this specification are incorporated herein by reference in their entirety and to the same extent as if each reference was individually incorporated by reference.
FIELD OF THE INVENTION
[003] This invention relates to optical devices. More specifically, the present invention relates to collimated optical light source assemblies that produce a uniform white light.
BACKGROUND OF THE INVENTION
[004] Entertainment, architectural and theater industries have applications which benefit from the creation of millions of colors for light painting, product enhancement, or special effect. Light emitting diodes of multiple primary wavelengths may be placed in the same cavity to produce such artistic color effects. Multiple cavities each comprised of multiple primaries may be arranged in such a way as to provide over 1000 lumens of red, green or blue light or any combination thereof.
Secondary optics are required to throw light of many different colors over a long distance which requires light beams with minimum luminous intensity dispersion.
[005] LED light engines with multi-primary emitters are known, for instance the
7-cavity Lamina Titan™ light engine. By themselves, light engines are historically difficult to both collimate to a narrow beam as well as achieve acceptable color uniformity. Traditional optics lack sufficient color uniformity enhancement features, and project regions of light with high discrete, non-homogenized intensities of the individual primary colors red, green and blue. Poor composite color uniformity is produced as a result, which is not desirable for some applications. A need exists for a combination of color uniformity enhancement and collimation features that direct the light from a multi-cavity, wide beam, e.g., 60 degree LED light array to a narrow beam of light or a beam characterized as comprising an intensity dispersion <15deg at the half maximum of the intensity peak.
SUMMARY OF THE INVENTION
[006] It is more acceptable to combine the light from multiple red/green/blue ("RGB") primary color emitters arranged in a multi-cavity LED array to achieve a variable white color temperature from 20000K to 80000K for example. 20000K represents the blackbody temperature equivalent to a warm white color. 80000K is the blackbody temperature equivalent to a cool white or a white comprised of more blue. Preferably, in one embodiment of the invention the multi-cavity LED array includes seven LED cavities.
[007] A device in accordance with an embodiment of the present invention preferably includes uniformity and collimation features shown in FIG. 1. which may include one or more of the following:
[008] 1) A multi-cavity RGB LED array 1;
[009] 2) A reflecting cavity 2 with Lambertian scattering texture;
[0010] 3) A Lenslet array 3;
[0011] 4) Cone lens 4;
[0012] 5) Reflector 5;
[0013] The combined effect of these uniformity and collimation features is to collimate a relatively wide-angle light beam emitted by an LED array into a relatively narrow-angle collimated light beam, such that color uniformity of the collimated light beam is enhanced.
BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The present invention will be more readily understood from the detailed description of exemplary embodiments presented below considered in conjunction with the accompanying drawings, in which:
[0015] FIG. 1 is a side schematic view of one embodiment of the RGB array collimation optical assembly of the present invention;
[0016] FIG. 2 is a top view of LED cavity placement; Each of the 6 peripheral cavities may contain 4 light emitting diodes of different primary wavelengths. The center cavity may have 1 each of red green and blue or other primary direct emission light emitting diode.
[0017] FIG. 3 is a ray trace diagram illustrating some of the light paths through the embodiment of FIG. 1 ;
[0018] FIG. 4 is a raytracing simulation plot of the relative intensity distribution as a function of angular dispersion.
[0019] FIG. 5 is a raytracing simulation plot of the illuminance distribution at a distance of 1 meter from the 7-cavity LED array source and optic.
[0020] FIG. 6 is a measured beam speckle pattern for R+G+B primary colors combined in correct ratio to produce a 65000K white color temperature equivalent in which the primary color combination produces approximately a white with 1931 x,y chromaticity coordinates of .3136 and .3237;
[0021] FIG. 7 is a measured beam speckle pattern for R+G+B primary colors combined in correct ratio to produce a 47500K white color temperature equivalent; in which the primary color combination produces a white with approximately 1931 x,y chromaticity coordinates in the vicinity of .3525 and .3574.
[0022] FIG. 8 is a measured beam speckle pattern for R+G+B primary colors combined in correct ratio to produce a 28500K white color temperature equivalent. The white chromaticity coordinates are near .4480 and .4076 respectively.
DETAILED DESCRIPTION OF THE INVENTION
[0023] Features of an embodiment of the present invention are shown in Figure 1. The reflecting cavity 2, lenslet array 3, cone lens 4 and reflector 5 are collectively referred to herein as the collimation optic. The collimation optic is used to decrease the intensity dispersion of a multi-cavity wide beam, e.g., 60 degree primary light engine cavity 1 in which the light emitters include light emitting diodes of different primary wavelengths, and wherein 60 degree refers to the beam angle of the light collectively emitted by the light engine cavities 1. The multi-cavity 60 degree
primary light engine may for example be the 7-cavity Lamina Titan™ light engine. A light engine with other than 7 cavities may also be used, so long as the beam angle of the emitted light, prior to any collimation optics, is approximately 60 degrees and the field angle is approximately 100 degrees.
[0024] Light exiting the LED array 1 disperses at approximately a 60 degree beam angle. The light then proceeds to reflecting cavity 2 which preferably has a barrel spline shape or elliptical cross-sectional shape with truncated entrance and exit planes. This desired cross-sectional shape is matched to the 60 degree beam width of the LED array 1, and produces the greatest on-axis light intensity. However deviations from this cross-sectional shape are usable but will produce a reduced on- axis light intensity. For example, a deviation of 5% RMS from the prescribed cross- sectional shape can produce a 20% reduction in on-axis intensity. The reflecting cavity 2 has symmetry around the optical axis.
[0025] The interior surface of the reflector cavity 2 has a Lambertian texture. Intensity of light reflected from the interior of reflector cavity 2 varies with the cosine of the angle with respect to normal or 0 degree dispersion. A Lambertian scatterer redirects light with constant luminance when viewed at any angle. The Lambertian scatter texture randomizes the light of the primary colors in such a manner that light will emerge from the top of the reflector cavity 2 at an approximately equal intensity in all radial angles around the axis of rotation of the reflector cavity 2.
[0026] Materials such as AMODEL™ polyphthalamide (PPA) from Solvay Advanced Polymers or equivalent can be molded into the desired cross-sectional shape with high reflectivity, and including the Lambertian scatter texture. Some loss is incurred in the randomization scatter process as such the enhancement of color
uniformity has a trade-off. For example, although the Lambertian scatter texture of the reflector randomizes the light fields of the primary colors, it also directs light back towards the source which is undesirable. A reflector plate filling the spaces between the light cavities helps to recirculate some of this light back towards the exit aperture.
[0027] After scattering from the surface of the reflector cavity 2, the light passes through a lenslet array 3. The lenslet array 3 produces intermediate micro-images which further homogenize the light. The lenslet array 3 may include for instance a lenslet array as described in U.S. Patent Application Number 11/737,101 and provisional U.S. Patent Application Number 60/971,255, the entire contents of which are hereby incorporated herein in their entirety, and which are under a common obligation of assignment as with the present application.
[0028] After the light passes through the lenslet array 3, it enters into and passes through the walls of an approximately cone-shaped lens 4. which acts as a dispersing optic. A revolved polynomial is the preferred cross-sectional shape for the cone- shaped lens 4 because deviations in the shape from that of a revolved polynomial will produce unwanted artifacts or holes in the intensity pattern of the beam of light, i.e., a region or zone with reduced illuminance which the eye can detect.
[0029] Howrever, changes to the revolved polynomial shape can also be tailored to produce different beam patterns when the reflector is changed to match, thus offering opportunities for different beam patterns. The eye perceives illuminance variations at 2.4*LOG(x,y) where x,y is the illuminance zone value. The x and y values represent the indices of vertical and horizontal spatial zones as referenced from the optical axis.
[0030] Light disperses through the side of the cone-shaped lens 4 for final collimation by the reflector 5. A 4th-order polynomial may describe the shape of the cone-shaped dispersing lens, for instance: z = 2E-05xΛ4 + 0.0007xΛ3 - 0.0056xΛ2 + 1.4405x + 70.761. A 4th order polynomial which approximates a solution for the shape of the final collimation reflector is. for instance: z = 8E-06xΛ4 + 0.0014xΛ3 + 0.0973xΛ2 + 1.835 Ix + 49.335 in which z represents the forward light direction orthogonal to the source plane. A secondary lens is not recommended as the additional loss/collimation benefit ratio is too high. The final reflector preferably has an exit aperture which is larger than the input aperture or it will not collimate light. A confocal parabolic concentrator is commonly used to collimate light exiting from a finite source aperture.
[0031] By producing homogenous light from multiple primary color LED emitters housed in multiple cavities, the light intensity of each of the primary color emitters may be tuned to produce a variable white color temperature from warm to cool white. Other colors may also be produced as contained with the chroma triangle produced by the wavelengths of the primaries. However, colors of the LED die contained within the LED array 1 may be entirely arbitrary depending on the chroma polygon required, e.g., ultraviolet or infrared LEDs, or combinations of hybrid phosphor/direct emission sources is also possible so long as the reflective materials used in the assembly are tailored to efficiently reflect those wavelengths. Cavities containing only diode pumped phosphor may be interspersed with direct emission monochromatic primary colors.
[0032] The above description is presented to enable a person skilled in the art to make and use the invention, and is provided in the context of a particular application and its requirements. Various modifications to the preferred embodiments will be
readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the invention. Thus, this invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed herein.
[0033] This application may disclose several numerical range limitations. The polynomials enclosed are tailored specifically to the 60 degree intensity distribution pattern of the 7 cavity LED source array. Other ranges or variations from the polynomials disclosed may be used. The color uniformity enhancement features allow for the production of a tunable wrhite temperature from 20000K to 80000K. To produce a 65000K white the approximate ratio of red, green and blue light is 50% 457nm. 26% 525nm, and 23% 625nm. To produce 47500K white the approximate spectral power ratio of light is 40% 457nm. 28% 525nm, and 32% 625nm red. To produce 28500K warm-white the spectral power ratio is approximately 16% 457nm, 26% 525nm, and 58% 625nm light. The entire disclosure of the patents and publications referred in this application are hereby incorporated herein by reference.
Claims
1. An apparatus for producing collimated uniform white light, comprising: a reflecting cavity having a predetermined reflective surface texture, configured to receive light from a light engine and to produce reflected light; a micro-lenslet array disposed to receive at least a portion of the reflected light to produce a first dispersed light; a concave lens disposed to receive at least a portion of the first dispersed light to produce a second dispersed light; and a collimation reflector disposed to reflect at least a portion of the second dispersed light to produce collimated uniform white light.
2. The apparatus of claim 1, wherein the predetermined surface texture of the reflecting cavity includes a Lambertian scattering texture.
3. The apparatus of claim 1 , wherein the reflecting cavity has a vertical cross section shape selected from the group consisting of barrel spline shape and elliptical cross-sectional shape with truncated entrance and exit planes.
4. The apparatus of claim 1 , wherein the reflecting cavity has a vertical cross section shape matched to the beam width of the received light.
5. The apparatus of claim 1 , wherein the reflecting cavity is symmetrical around the optical axis.
6. The apparatus of claim 1, wherein the predetermined reflective surface texture comprises a Lambertian texture.
7. The apparatus of claim 6, wherein the Lambertian texture is configured to produce light that emerges from the top of the reflecting cavity at an approximately equal intensity in all radial angles around an axis of rotation of the reflecting cavity.
8. The apparatus of claim 1, wherein the micro-lenslet array is configured to produce intermediate micro-images.
9. The apparatus of claim 1. wherein the concave lens is approximately cone-shaped.
10. The apparatus of claim 1 , wherein the concave lens has a vertical cross-section shape of a revolved polynomial.
11. The apparatus of claim 1 , wherein the collimation reflector has a vertical cross-section shape of a revolved polynomial.
12. The apparatus of claim 1, wherein the collimation reflector is a confocal parabolic concentrator.
13. A system for producing collimated uniform white light, comprising: a light engine; a reflecting cavity having a predetermined reflective surface texture, configured to receive light from the light engine and to produce reflected light; a micro-lenslet array disposed to receive at least a portion of the reflected light to produce a first dispersed light; a concave lens disposed to receive at least a portion of the first dispersed light to produce a second dispersed light; and a collimation reflector disposed to reflect at least a portion of the second dispersed light to produce collimated uniform white light.
14. The system of claim 13, wherein the light engine comprises an LED array disposed among a plurality of light-engine cavities.
15. The system of claim 14, wherein at least one primary direct emission LED is disposed within a central light-engine cavity of the plurality of light-engine cavities, and four LEDs of different primary wavelengths are disposed within at least one of a plurality of non-central light- engine cavities.
16. The system of claim 13, wherein the light engine has a beam width of approximately 60 degrees.
17. The system of claim 14, wherein the light engine further comprises a reflector disposed between at least a portion of the plurality of light- engine cavities.
18. The system of claim 14, wherein a diode-pumped phosphor is disposed within at least a portion of the plurality of light-engine cavities.
19. A method for producing collimated uniform white light, comprising the following steps: emitting light using a plurality of LEDs disposed within a plurality of light-engine cavities; reflecting at least a portion of the emitted light, using a reflecting cavity having a predetermined reflective surface texture, to produce a reflected light; dispersing at least a portion of the reflected light, using a micro-lenslet array, to produce a first-dispersed light; dispersing at least a portion of the first-dispersed light, using a concave lens, to produce a second-dispersed light; and receiving at least a portion of the second-dispersed light, using a collimation reflector, to produce collimated uniform white light.
20. The method of claim 19, further comprising the steps of: disposing at least one primary direct emission LED within a central light-engine cavity of the plurality of light-engine cavities; and disposing four LEDs of different primary wavelengths within at least one of a plurality of non-central light-engine cavities.
21. The method of claim 19, wherein the step of emitting light further comprises emitting light having a beam width of approximately 60 degrees.
22. The method of claim 19, further comprising the step of reflecting light from between at least a first portion and a second portion of the plurality of light-engine cavities.
23. The method of claim 19, further comprising the step of converting the wavelength of light from within at least a portion of the plurality of light-engine cavities by use of a phosphor.
24. The method of claim 19, further comprising tuning the emitted light to a predetermined color by using one or more selected color LEDs.
25. The method of claim 23, further comprising tuning the emitted light to a predetermined color by using a selected phosphor.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP08835018.6A EP2195700A4 (en) | 2007-10-01 | 2008-10-01 | Seven-cavity led array rgb collimation optic |
US12/680,700 US8087800B2 (en) | 2007-10-01 | 2008-10-01 | Multi-cavity LED array RGB collimation optic |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US97669307P | 2007-10-01 | 2007-10-01 | |
US60/976,693 | 2007-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009046050A1 true WO2009046050A1 (en) | 2009-04-09 |
Family
ID=40526638
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2008/078368 WO2009046050A1 (en) | 2007-10-01 | 2008-10-01 | Seven-cavity led array rgb collimation optic |
Country Status (3)
Country | Link |
---|---|
US (1) | US8087800B2 (en) |
EP (1) | EP2195700A4 (en) |
WO (1) | WO2009046050A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010113091A1 (en) * | 2009-03-31 | 2010-10-07 | Koninklijke Philips Electronics, N.V. | Optics device for stage lighting |
WO2011094122A3 (en) * | 2010-01-27 | 2011-11-10 | Cree, Inc. | Lighting device with multi-chip light emitters, solid state light emitter support members and lighting elements |
WO2012071068A1 (en) * | 2010-11-24 | 2012-05-31 | Robe Lighting Inc | Improved beam control for an led luminaire |
US8901845B2 (en) | 2009-09-24 | 2014-12-02 | Cree, Inc. | Temperature responsive control for lighting apparatus including light emitting devices providing different chromaticities and related methods |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8272759B2 (en) * | 2011-01-18 | 2012-09-25 | Dbm Reflex Of Taiwan Co., Ltd. | Light-emitting diode lampshade |
US8430536B1 (en) * | 2012-10-01 | 2013-04-30 | Zumtobel Lighting Inc. | LED lighting system including TIR optic |
US9411086B2 (en) * | 2013-01-30 | 2016-08-09 | Cree, Inc. | Optical waveguide assembly and light engine including same |
EP2951626B1 (en) * | 2013-01-30 | 2020-12-30 | Ideal Industries Lighting Llc | Optical waveguides |
US9690029B2 (en) | 2013-01-30 | 2017-06-27 | Cree, Inc. | Optical waveguides and luminaires incorporating same |
US9625638B2 (en) | 2013-03-15 | 2017-04-18 | Cree, Inc. | Optical waveguide body |
US9366396B2 (en) | 2013-01-30 | 2016-06-14 | Cree, Inc. | Optical waveguide and lamp including same |
US9291320B2 (en) | 2013-01-30 | 2016-03-22 | Cree, Inc. | Consolidated troffer |
US9442243B2 (en) | 2013-01-30 | 2016-09-13 | Cree, Inc. | Waveguide bodies including redirection features and methods of producing same |
US10436969B2 (en) | 2013-01-30 | 2019-10-08 | Ideal Industries Lighting Llc | Optical waveguide and luminaire incorporating same |
US9869432B2 (en) | 2013-01-30 | 2018-01-16 | Cree, Inc. | Luminaires using waveguide bodies and optical elements |
US10379278B2 (en) * | 2013-03-15 | 2019-08-13 | Ideal Industries Lighting Llc | Outdoor and/or enclosed structure LED luminaire outdoor and/or enclosed structure LED luminaire having outward illumination |
US10209429B2 (en) | 2013-03-15 | 2019-02-19 | Cree, Inc. | Luminaire with selectable luminous intensity pattern |
US10400984B2 (en) | 2013-03-15 | 2019-09-03 | Cree, Inc. | LED light fixture and unitary optic member therefor |
US9798072B2 (en) | 2013-03-15 | 2017-10-24 | Cree, Inc. | Optical element and method of forming an optical element |
US9366799B2 (en) | 2013-03-15 | 2016-06-14 | Cree, Inc. | Optical waveguide bodies and luminaires utilizing same |
US10502899B2 (en) * | 2013-03-15 | 2019-12-10 | Ideal Industries Lighting Llc | Outdoor and/or enclosed structure LED luminaire |
US9920901B2 (en) | 2013-03-15 | 2018-03-20 | Cree, Inc. | LED lensing arrangement |
US10436970B2 (en) | 2013-03-15 | 2019-10-08 | Ideal Industries Lighting Llc | Shaped optical waveguide bodies |
WO2016032885A1 (en) * | 2014-08-25 | 2016-03-03 | Corning Incorporated | Sealed device and methods for making the same |
US9512978B1 (en) | 2015-08-13 | 2016-12-06 | Randal L Wimberly | Vortex light projection system, LED lensless primary optics system, and perfectly random LED color mixing system |
DE102016207143A1 (en) * | 2016-04-27 | 2017-11-02 | Zumtobel Lighting Gmbh | lights optics |
US11719882B2 (en) | 2016-05-06 | 2023-08-08 | Ideal Industries Lighting Llc | Waveguide-based light sources with dynamic beam shaping |
US10416377B2 (en) | 2016-05-06 | 2019-09-17 | Cree, Inc. | Luminaire with controllable light emission |
US10871271B2 (en) | 2018-10-05 | 2020-12-22 | Tempo Industries, Llc | Diverging TIR facet LED optics producing narrow beams with color consistency |
US11619828B2 (en) * | 2020-01-17 | 2023-04-04 | Stmicroelectronics (Research & Development) Limited | Transmission beam splitter |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060002108A1 (en) * | 2004-06-30 | 2006-01-05 | Ouderkirk Andrew J | Phosphor based illumination system having a short pass reflector and method of making same |
US20060098451A1 (en) * | 2004-11-08 | 2006-05-11 | Global Fiberoptics Inc. | Illuminator for video display apparatus |
US7072096B2 (en) * | 2001-12-14 | 2006-07-04 | Digital Optics International, Corporation | Uniform illumination system |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5302778A (en) * | 1992-08-28 | 1994-04-12 | Eastman Kodak Company | Semiconductor insulation for optical devices |
US6364487B1 (en) * | 1999-01-29 | 2002-04-02 | Agilent Technologies, Inc. | Solid state based illumination source for a projection display |
US7153015B2 (en) * | 2001-12-31 | 2006-12-26 | Innovations In Optics, Inc. | Led white light optical system |
CA2620144A1 (en) * | 2005-04-06 | 2006-10-12 | Tir Technology Lp | Lighting module with compact colour mixing and collimating optics |
EP1952055B1 (en) * | 2005-11-17 | 2019-01-09 | Philips Lighting Holding B.V. | Lamp assembly |
WO2008080165A2 (en) * | 2006-12-22 | 2008-07-03 | Lighting Science Group Corporation | Multi-primary led collimation optic assemblies |
US7837349B2 (en) * | 2007-06-15 | 2010-11-23 | Visteon Global Technologies, Inc. | Near field lens |
US8002435B2 (en) * | 2008-06-13 | 2011-08-23 | Philips Electronics Ltd Philips Electronique Ltee | Orientable lens for an LED fixture |
-
2008
- 2008-10-01 EP EP08835018.6A patent/EP2195700A4/en not_active Withdrawn
- 2008-10-01 US US12/680,700 patent/US8087800B2/en active Active
- 2008-10-01 WO PCT/US2008/078368 patent/WO2009046050A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7072096B2 (en) * | 2001-12-14 | 2006-07-04 | Digital Optics International, Corporation | Uniform illumination system |
US20060002108A1 (en) * | 2004-06-30 | 2006-01-05 | Ouderkirk Andrew J | Phosphor based illumination system having a short pass reflector and method of making same |
US20060098451A1 (en) * | 2004-11-08 | 2006-05-11 | Global Fiberoptics Inc. | Illuminator for video display apparatus |
Non-Patent Citations (1)
Title |
---|
See also references of EP2195700A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010113091A1 (en) * | 2009-03-31 | 2010-10-07 | Koninklijke Philips Electronics, N.V. | Optics device for stage lighting |
US8901845B2 (en) | 2009-09-24 | 2014-12-02 | Cree, Inc. | Temperature responsive control for lighting apparatus including light emitting devices providing different chromaticities and related methods |
WO2011094122A3 (en) * | 2010-01-27 | 2011-11-10 | Cree, Inc. | Lighting device with multi-chip light emitters, solid state light emitter support members and lighting elements |
WO2012071068A1 (en) * | 2010-11-24 | 2012-05-31 | Robe Lighting Inc | Improved beam control for an led luminaire |
Also Published As
Publication number | Publication date |
---|---|
US8087800B2 (en) | 2012-01-03 |
US20100238645A1 (en) | 2010-09-23 |
EP2195700A4 (en) | 2014-03-19 |
EP2195700A1 (en) | 2010-06-16 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US8087800B2 (en) | Multi-cavity LED array RGB collimation optic | |
US8907368B2 (en) | Double collimator LED color mixing system | |
US7731388B2 (en) | High efficiency LED light source arrangement | |
US9022601B2 (en) | Optical element including texturing to control beam width and color mixing | |
EP2985512B1 (en) | Led unit module, light-emitting device, and light source system | |
US10295153B2 (en) | Optical system for producing uniform illumination | |
EP1007993B1 (en) | Single quantum well light emitting diode having an optical element | |
US20080205061A1 (en) | Apparatus And Method Of Using A Led Light Source To Generate An Efficent, Narrow, High-Aspect Ratio Light Pattern | |
US20140132937A1 (en) | Optical element and projection arrangement including such an optical element | |
US10837619B2 (en) | Optical system for multi-emitter LED-based lighting devices | |
JP2003503825A (en) | Lighting equipment that mixes light from different LEDs | |
CN102644864B (en) | Light-emitting device and use the ligthing paraphernalia of this light-emitting device | |
US9976707B2 (en) | Color mixing output for high brightness LED sources | |
DE102014221668B4 (en) | lighting device | |
WO2010146499A1 (en) | Illumination system for spot illumina | |
US20240004208A1 (en) | Laser light sources and methods | |
EP3519886B1 (en) | Non-rotationally symmetric lens for non-rotationally symmetric light source resulting in rotationally symmetric beam pattern | |
WO2018059966A1 (en) | Non-rotationally symmetric lens for non-rotationally symmetric light source resulting in rotationally symmetric beam pattern | |
US11347038B2 (en) | Optical system and lighting device | |
TW201200802A (en) | Spot illumination system with improved light mixing | |
WO2004104925A2 (en) | Method and apparatus for use in injecting light into an optical system |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 08835018 Country of ref document: EP Kind code of ref document: A1 |
|
DPE1 | Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 12680700 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2008835018 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |