US2673923A - Means for producing colored light beams - Google Patents

Means for producing colored light beams Download PDF

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Publication number
US2673923A
US2673923A US78951647A US2673923A US 2673923 A US2673923 A US 2673923A US 78951647 A US78951647 A US 78951647A US 2673923 A US2673923 A US 2673923A
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Prior art keywords
light
beams
system
component
beam
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Williams Rollo Gillespie
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Duro-Test Corp
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Duro-Test Corp
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Other optical systems; Other optical apparatus
    • G02B27/10Beam splitting or combining systems
    • G02B27/12Beam splitting or combining systems operating by refraction only
    • G02B27/123The splitting element being a lens or a system of lenses, including arrays and surfaces with refractive power
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Other optical systems; Other optical apparatus
    • G02B27/10Beam splitting or combining systems
    • G02B27/1006Beam splitting or combining systems for splitting or combining different wavelengths
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Other optical systems; Other optical apparatus
    • G02B27/10Beam splitting or combining systems
    • G02B27/14Beam splitting or combining systems operating by reflection only
    • G02B27/143Beam splitting or combining systems operating by reflection only using macroscopically faceted or segmented reflective surfaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2121/00Use or application of lighting devices or systems for decorative purposes, not provided for in codes F21W2102/00 – F21W2107/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21WINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
    • F21W2131/00Use or application of lighting devices or systems not provided for in codes F21W2102/00-F21W2121/00
    • F21W2131/40Lighting for industrial, commercial, recreational or military use
    • F21W2131/406Lighting for industrial, commercial, recreational or military use for theatres, stages or film studios

Description

March 30, 1 R. G. WILLIAMS MEANS FOR PRODUCING commas LIGHT BEAMS a sheetswsheet 1 Filed Dec. s, 1947 FIG. I.

F162. FIG. 8.

ci/m'p/e y F R. G. WILLIAMS March 30, 1954 3 Sheets-Sheet 2 Filed Dec. 3. 1947 FIG. 5.

k. 0 f M V M 0 M: II W a 2 W w n Ill a M D y P I. W 9

March 30, 1954 R, w s 2,673,923

MEANS FOR PRODUCING COLORED LIGHT BEAMS Filed Dec. 3, 194'? 3 Sheets-Sheet 3 FIG. 6.

Patented Mar. 30, 1954 MEANS FOR PRODUCING COLORED LIGHT BEAMS Rollo Gillespie Williams, Great Neck, N. Y., as-

signor, by mesne assignments, to Duro-Test Corporation, North Bergen, N. J., a corporation of New York Application December 3, 1947, Serial No. 789,516

1 Claim. (Cl. 240-3.1)

This invention relates to improvements in light of difierent color to provide illumination which can be blended into one final beam of light.

It is sometimes desired to mingle the light of a plurality of colors such, for example, as the four colors, white, red, green and blue, in such a manner that by blending the light in diiferent proportions difierent color hues are obtained. If four spotlights corresponding to these four colors are mounted close together, it will be found that undesirable color shadows are created and the four beams do not generally intermingle sufiiciently to avoid what is known as color fringing.

It is therefore desired that these beams should be so intermingled that the colors in question can be sufiiciently combined to avoid these phenomena, and an object of the present invention is apparatus whereby this result maybe achieved. It is to be understood, however, that this inven tion applies to the combination of any required number of colored light sources, and that the number "fo-ur is quoted as an example. Also, the sources can be arranged to give any desired color of light and means may be employed for varying the color and/or intensity of the useful emitted light. For example, in the case of a plurality of light sources, individual dimmers may be employed to vary the useful emitted light.

The expression useful emitted light used herein means the amount of light which is eventually used for illuminating or other purposes and if means, such as for example iris diaphragms are employed for. controlling the light from 'any light source, it will be appreciated that the amount of useful emitted light may be lessthan amount of light emitted (that is, produced) by the .source. According to the present invention, means are provided whereby a major light beam is split into a number of component beams; predetermined component beams are transposed and means are provided for combining the component beams into a unitary beam. The expression major beam is used as a matter of convenience to indicate a beam from any convenient source of light and includes where the context so permits, a plurality of beams derived from a single beam; specifically, it is employed (where the context so admits) to mean the flux of light allocated to any one color before the splitting takes place. According to one method of carrying the invention into effect, color light '2 ing apparatus is provided comprising a light source or plurality of light sources or other means affording a plurality of major beams of light, in combination with two optical systems, the first of which functions to split each major beam into a plurality of component beams and transposes some component beams or predetermined parts thereof and the second of which collects said component beams and transmits them as a unitary beam. The expression optical system as used herein means an arrangement of lenses, prisms, or reflectors, or any combination thereof.

Specifically, the first optical system is so constructed and arranged that the number of component beams into which each major beam is split, is preferably a multiple of the number .of colors to be mingled.

It is an object of the present invention to overcome the difiiculties mentioned above by means of the type generally indicated above.

Other objects will become apparent from the following description taken in connection with the attached drawings showing several illustrative embodiments of the invention and wherein: Fig. 1 is a horizontal sectional view of the apparatus (taken on the line l-l in Fig. 2).

Fig. 2 is an elevation of the first opticalsys- 'tem of Fig. 1. Fig. 3 is a diagram illustrating the manner in which the first system splits and transposes the beams emanating from the various sources, as viewed in the plane of the second optical system.

Fig. 4 is a. diagram illustrating how reflectors may be used in the optical systems.

Fig. 5 is a diagram illustrating the use of lenses and reflectors in the first optical system. Fig. 6 is a diagram illustrating a firstloptical system consisting of reflectors and a second op} t'ical system consisting of refracting prisms. and masks. Fig. '7 is a diagram illustrating an arrangement in which the emission of a single source is divided into a plurality of major beams.

It is to be assumed that it is desired to combine the light of four different colors emanating from four separate light sources, which may be referred to as R (for red), G (for green), B (for blue) and W (for white).

The four light sources may be mounted, say, in pairs one above the other so that each light source terms, say, a corner of a square or rectangle, each light source being more or less separ rated from the others. The desired hue of colored light can be provided by means of a color filter associated with each or selected of the light sources at any location between the source and the emergence of the final unified beam (e. g. the lenses of oneor each optical system may be made of colored glass) or each light source itself can. emit colored (including white) light.

From each source, there emanates a major beam; in Fig. 1 the major beams from sources R and G are indicated at IR; and. K respectively. In front of the light sources, there is a first optical system I, one function of which is to collect the major beam from each source andtransmit a plurality of separate narrow-angle (or parallel) component beams. on the drawings these component beams are given the reference: letter of the source from which they emanate, primed with "an index number 1, 2, 3 or 4 as the case may be. There will preferably be as many component beams of light (or multiples of this numher) from each light source as there are fundamental colors to be mingled. Thus, if four colors are to be mingled in one final beam, the light collected from each source is divided into four (or multiples of four) separate beams of light. This can be done either by one composite lens or by a number of separate lenses suitably mounted for each light source.

Thus in the drawings the component beams are indicated at R R R R G G etc., the component lenses that constitute the first optical system are indicated at r r r T g g etc.

A further function of the first optical system I is to transpose certain or all of the component beams from the various sources so that their location, in a plane substantially normal to the general direction of light transmission is changed and a jumbling. or "scrambling" of the component beams results, On Fig. 2. arrows indicate the direction in which certain component beams are diverted' for this purpose, while Fig. 3 illustrates the resultant transposition at the second system and maybe considered as representing a. section taken in the said plane, showing the resultant patchwork effect.

All these component light beams. are transmitted to a second optical system (or straightener) 2 mounted at a convenient distance in front of the first system. The second system (of said Fig. 1) caneither take the form of one composite lens or may include a number of separate lenses suitably mounted and can be either larger or smaller in area than the first set of lenses or composite lens. 7

Some or all of the component beams of light from the first system i or set of lenses nearest to the light sources will enter the second system 2 or. set of lenses at an angle, but the second set of lenseswill bearranged tobring all the component beams into a parallelo-r nearly parallel direction "wtih each other, as illustrated in Fig. 1. To accomplish this, it is necessary for each separate lens (or section of a composite lens) in the first system I which transposes a beam, to have a corresponding lens (or part of a composite lens) in the second system 2. The second set of lenses (or part of a composite lens) will, however, be arranged in a different order.

Some of the component light beams from the first system may enter the second system direct, i. e'. not at an angle, but other component beams will be deflected by the first system, so as to enter the second system-at an angle, so that there will be a greater-distance between say, two component lightbea ms ofthe'sa'me color after passing through the second system than was the case when the light beams left the first system. The second system will, however, finally bring all the component light beams into one final narrow angle, or parallel beam of light of the kind provided by spotlights. In this manner, lights of different colors are more closely mingled 1 in one final beam.

In Fig. 4, the light from the sources of which R and G are examples, is collected and projected forward as parallel major beams IR and IG by parabolic reflectors 3 and 4 which pass through nests of black masking rings or slats 5 anld 6. These permit the passage of the light from the reflectors 3 and 4 without obstruction but substantially prevent the passage of light direct from the sources. Each major beam is broken up into its component beams by the first optical system and certain component beams from the two major beams are transposed. This is effected by allowing component beams R to pass straight ahead without interference but by deflecting component beams R G by strip reflectors T, 8. At the second optical system 2, beams R Gr again pass straight ahead, but component beams R G are straightened by strip reflectors 9 and I0.

In Fig. 5, reflectors 3, 4' are employed to collect the light from each source into its major beam. The first optical system I comprises lens plates H and [2 with circular prisms formed thereon serving to straighten the major beams and reflectors i and S for splitting and transposing.

In Fig. 6 the major beam directed rearwardly from each source R and G is split into its component beams, and the required transposition is effected, by suitably shaped reflectors or reflector sections i3, i i, I5, 66 (one for each component beam of each initial color). The transposed beams R and G are directed by their reflectors 14, I5 to the means (here shown as refracting prisms l1, (8) in the second system 2 by which they are straightened; in passage to the second system they are masked by plates I9, 20 which prevent the emergence of stray light. The component beams R G that are thrown. by reflectors l3, l6, straight forward to the second system also pass through masking plates I9, 2D for a like purpose; these plates also suppress light travelling directly forward from the sources R, G.

In Figs. 4 and 6 instead of reflectors behind the sources, the light from the sources may be col,- lected into parallel major beams by refracting means located in front of the sources.

It will be appreciated that instead of there being a plurality of separate and distinct light sources which, as hereinbefore. described, generate separate major beams, there may be a common source such as X in Fig. 'i, the light from which is divided into the plurality of major beams each of which is subsequently split into a number of component beams by means such as reflectors 2|, 22 one for each beam. There may, for example, be positioned in front of or behind a single light source a multi-colored filter indicated at 23. The filter may, for example, be in the form of a square divided into four equal squares and one of these squares is colored red, the other green, the third blue and the fourth clear. In this manner, from a single source of light, four major beams of four different colors are obtained and these four major beams are transmitted to the first optical system I and from thence 'to the second optical system 2 in the manner previously described. It will be appreciated that there may be any desired number of individual light sources giving a plurality of major beams in the manner described and redetermined component beams of said major beams are transmitted to the second optical system in accordance with the present invention.

Since these major beams all emanate from a common source X, their individual intensities cannot easily be varied by means of dimmers or the like. On the other hand, the amount of light finally utilized from each beam (and transmitted through the optical systems) may be varied by control means 24, 25 such as an iris diaphragm, movable shutter or shutters, or one or more movable lenses, through which the beams pass on their way to the first optical system I. Such means may be operated individually and/or collectively. For example, there may be a patterning mechanism which may be pre-set to afford a predetermined combination of settings of said controlling means and mechanism whereby the controlling means are adjusted in accordance with any selected combination. The first optical system illustrated in Fig. 7, comprises main lenses II and I2 and transposing lenses T 9 while the second system 2 comprises straightening lenses 27'2 and 29 The expression optical system and "lenses or set of lenses as used in this description is meant to cover the necessary prisms, lenses, or reflectors required to produce the desired collection and/or deflection of light rays and, in practice each lens may in fact be a composite lens, or a combination of lenses as required to carry out the desired control of the light rays.

The optical systems of any of the illustrative forms shown and described can. if desired, be arranged also to difluse or widen the angle of the final composite beam of light.

From the foregoing it will be seen that by the present invention a resultant light beam of any desired color hue can be obtained by employing either a plurality of light sources each emitting a major beam, the relative intensity of which may be varied as required, or by employing a single light source from which a plurality of major beams are obtained such as by the use of a multi-colored filter, it being understood that the relative intensity of said beams may be varied, as required, as by the use of shutters or die.- phragms.

It will be noted that the constructions shown and described will serve admirably to accomplish the objects stated above. It is to be understood, however, that the constructions disclosed above are intended merely as illustrative of the invention and not as limiting as various modifications therein may be made without departing from the invention as defined by a proper interpretation of the claim which follows:

I claim:

In a color lighting apparatus for producing a beam of colored light without color fringing, the combination of means aifording simultaneously a plurality of major beams of light each of a difierent color, a first optical system for splitting each major beam into a plurality of discrete beams of the same color as the corresponding major beam and transmitting all of said discrete beams onto distinct areas of an imaginary plane in a color interspersed pattern, and an optical system in said plane for transmitting said interspersed discrete beams as a parallel unitary beam.

ROLLO GILLESPIE WILLIAMS.

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US2673923A 1947-12-03 1947-12-03 Means for producing colored light beams Expired - Lifetime US2673923A (en)

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3111057A (en) * 1959-04-14 1963-11-19 Stanley S Cramer Means for providing variable lighting effects
FR2108090A1 (en) * 1970-09-30 1972-05-12 Eastman Kodak Co
US3664248A (en) * 1968-05-03 1972-05-23 Technical Operations Inc Optical processing of information including synthesis by complex amplitude addition of diffraction spectra
US3711697A (en) * 1971-03-10 1973-01-16 Corlite Corp Apparatus for displaying colored light patterns
FR2342460A1 (en) * 1976-02-27 1977-09-23 Mitsubishi Electric Corp Method of lighting to produce shadow colorees
US4740059A (en) * 1983-12-23 1988-04-26 Birger Boldt Method and apparatus for color synthesis
US5097258A (en) * 1989-10-25 1992-03-17 Stanley Electric Co., Ltd. Multicolor display lamp
US6139166A (en) * 1999-06-24 2000-10-31 Lumileds Lighting B.V. Luminaire having beam splitters for mixing light from different color ' LEDs
EP0965789A3 (en) * 1998-06-15 2001-04-11 Brian Edward Richardson Beam divergence and shape controlling module for projected light
EP0965788A3 (en) * 1998-06-15 2001-04-11 Brian Edward Richardson Color filter module for projected light
US20020048169A1 (en) * 1997-08-26 2002-04-25 Dowling Kevin J. Light-emitting diode based products
US20020070688A1 (en) * 1997-08-26 2002-06-13 Dowling Kevin J. Light-emitting diode based products
US20030076281A1 (en) * 1997-08-26 2003-04-24 Frederick Marshall Morgan Diffuse illumination systems and methods
US20040090191A1 (en) * 1997-08-26 2004-05-13 Color Kinetics, Incorporated Multicolored led lighting method and apparatus
US7186003B2 (en) 1997-08-26 2007-03-06 Color Kinetics Incorporated Light-emitting diode based products
US20100085773A1 (en) * 2009-01-02 2010-04-08 Brian Edward Richardson Optic system light guide with controlled output
US20100220492A1 (en) * 2009-06-11 2010-09-02 Brian Edward Richardson Optical system with reflectors and light pipes
US20100315836A1 (en) * 2009-06-11 2010-12-16 Brian Edward Richardson Flat panel optical display system with highly controlled output
US20100315802A1 (en) * 2009-06-11 2010-12-16 Brian Edward Richardson Optical system for a Light Emitting Diode with collection, conduction, phosphor directing, and output means
US20100328748A1 (en) * 2005-12-09 2010-12-30 Brian Edward Richardson TIR Light Valve
US20110116284A1 (en) * 2009-11-18 2011-05-19 Brian Edward Richardson Internal Collecting Reflector Optics For LEDs
US8272770B2 (en) 2009-01-02 2012-09-25 Rambus International Ltd. TIR switched flat panel display
US8827531B2 (en) 2011-05-13 2014-09-09 Rambus Delaware Llc Lighting assembly
US9291340B2 (en) 2013-10-23 2016-03-22 Rambus Delaware Llc Lighting assembly having n-fold rotational symmetry
US20170138547A1 (en) * 2014-07-01 2017-05-18 Philips Lighting Holding B.V. A lighting device providing light mixed from several light sources

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US961852A (en) * 1909-02-01 1910-06-21 Tamaki Fujita Universal photometer.
US1223459A (en) * 1916-09-28 1917-04-24 Gilbert C Whitney Means for producing colored-light effects.
US1458826A (en) * 1920-06-28 1923-06-12 Janovjak Josef Method of and means for projecting colors
US1601358A (en) * 1925-03-31 1926-09-28 Hall Tomas Proctor Spectrum lamp
US1738942A (en) * 1928-04-09 1929-12-10 Brenkert Karl Projection apparatus
US2217790A (en) * 1938-03-08 1940-10-15 Harold Devenish Smith Color projector

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US961852A (en) * 1909-02-01 1910-06-21 Tamaki Fujita Universal photometer.
US1223459A (en) * 1916-09-28 1917-04-24 Gilbert C Whitney Means for producing colored-light effects.
US1458826A (en) * 1920-06-28 1923-06-12 Janovjak Josef Method of and means for projecting colors
US1601358A (en) * 1925-03-31 1926-09-28 Hall Tomas Proctor Spectrum lamp
US1738942A (en) * 1928-04-09 1929-12-10 Brenkert Karl Projection apparatus
US2217790A (en) * 1938-03-08 1940-10-15 Harold Devenish Smith Color projector

Cited By (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3111057A (en) * 1959-04-14 1963-11-19 Stanley S Cramer Means for providing variable lighting effects
US3664248A (en) * 1968-05-03 1972-05-23 Technical Operations Inc Optical processing of information including synthesis by complex amplitude addition of diffraction spectra
FR2108090A1 (en) * 1970-09-30 1972-05-12 Eastman Kodak Co
US3711697A (en) * 1971-03-10 1973-01-16 Corlite Corp Apparatus for displaying colored light patterns
US4125888A (en) * 1976-02-27 1978-11-14 Mitsubishi Denki Kabushiki Kaisha Method of lighting for colored shadows
FR2342460A1 (en) * 1976-02-27 1977-09-23 Mitsubishi Electric Corp Method of lighting to produce shadow colorees
US4740059A (en) * 1983-12-23 1988-04-26 Birger Boldt Method and apparatus for color synthesis
US5097258A (en) * 1989-10-25 1992-03-17 Stanley Electric Co., Ltd. Multicolor display lamp
US20020048169A1 (en) * 1997-08-26 2002-04-25 Dowling Kevin J. Light-emitting diode based products
US7462997B2 (en) 1997-08-26 2008-12-09 Philips Solid-State Lighting Solutions, Inc. Multicolored LED lighting method and apparatus
US7352339B2 (en) 1997-08-26 2008-04-01 Philips Solid-State Lighting Solutions Diffuse illumination systems and methods
US7659674B2 (en) 1997-08-26 2010-02-09 Philips Solid-State Lighting Solutions, Inc. Wireless lighting control methods and apparatus
US20020070688A1 (en) * 1997-08-26 2002-06-13 Dowling Kevin J. Light-emitting diode based products
US20030076281A1 (en) * 1997-08-26 2003-04-24 Frederick Marshall Morgan Diffuse illumination systems and methods
US20030206411A9 (en) * 1997-08-26 2003-11-06 Dowling Kevin J. Light-emitting diode based products
US20030214259A9 (en) * 1997-08-26 2003-11-20 Dowling Kevin J. Light-emitting diode based products
US20040090191A1 (en) * 1997-08-26 2004-05-13 Color Kinetics, Incorporated Multicolored led lighting method and apparatus
US20040178751A1 (en) * 1997-08-26 2004-09-16 Color Kinetics, Incorporated Multicolored lighting method and apparatus
US20050236998A1 (en) * 1997-08-26 2005-10-27 Color Kinetics, Inc. Light emitting diode based products
US7161311B2 (en) 1997-08-26 2007-01-09 Color Kinetics Incorporated Multicolored LED lighting method and apparatus
US7186003B2 (en) 1997-08-26 2007-03-06 Color Kinetics Incorporated Light-emitting diode based products
US7274160B2 (en) 1997-08-26 2007-09-25 Color Kinetics Incorporated Multicolored lighting method and apparatus
US20070195526A1 (en) * 1997-08-26 2007-08-23 Color Kinetics Incorporated Wireless lighting control methods and apparatus
EP0965789A3 (en) * 1998-06-15 2001-04-11 Brian Edward Richardson Beam divergence and shape controlling module for projected light
EP0965788A3 (en) * 1998-06-15 2001-04-11 Brian Edward Richardson Color filter module for projected light
US6139166A (en) * 1999-06-24 2000-10-31 Lumileds Lighting B.V. Luminaire having beam splitters for mixing light from different color ' LEDs
US20100328748A1 (en) * 2005-12-09 2010-12-30 Brian Edward Richardson TIR Light Valve
US20100085773A1 (en) * 2009-01-02 2010-04-08 Brian Edward Richardson Optic system light guide with controlled output
US8272770B2 (en) 2009-01-02 2012-09-25 Rambus International Ltd. TIR switched flat panel display
US8152352B2 (en) 2009-01-02 2012-04-10 Rambus International Ltd. Optic system for light guide with controlled output
US20100315802A1 (en) * 2009-06-11 2010-12-16 Brian Edward Richardson Optical system for a Light Emitting Diode with collection, conduction, phosphor directing, and output means
US20100315836A1 (en) * 2009-06-11 2010-12-16 Brian Edward Richardson Flat panel optical display system with highly controlled output
US8152318B2 (en) 2009-06-11 2012-04-10 Rambus International Ltd. Optical system for a light emitting diode with collection, conduction, phosphor directing, and output means
US20100220492A1 (en) * 2009-06-11 2010-09-02 Brian Edward Richardson Optical system with reflectors and light pipes
US8292445B2 (en) 2009-06-11 2012-10-23 Rambus Inc. Optical system for a light emitting diode with collection, conduction, phosphor directing, and output means
US8297818B2 (en) 2009-06-11 2012-10-30 Rambus International Ltd. Optical system with reflectors and light pipes
US8733982B2 (en) 2009-11-18 2014-05-27 Rambus Delaware Llc Internal collecting reflector optics for LEDs
US20110116284A1 (en) * 2009-11-18 2011-05-19 Brian Edward Richardson Internal Collecting Reflector Optics For LEDs
US8827531B2 (en) 2011-05-13 2014-09-09 Rambus Delaware Llc Lighting assembly
US9291340B2 (en) 2013-10-23 2016-03-22 Rambus Delaware Llc Lighting assembly having n-fold rotational symmetry
US9903543B2 (en) * 2014-07-01 2018-02-27 Philips Lighting Holding B.V. Lighting device providing light mixed from several light sources
US20170138547A1 (en) * 2014-07-01 2017-05-18 Philips Lighting Holding B.V. A lighting device providing light mixed from several light sources

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