WO1999053238A1 - Linear illumination sources and systems - Google Patents

Linear illumination sources and systems Download PDF

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Publication number
WO1999053238A1
WO1999053238A1 PCT/US1999/006328 US9906328W WO9953238A1 WO 1999053238 A1 WO1999053238 A1 WO 1999053238A1 US 9906328 W US9906328 W US 9906328W WO 9953238 A1 WO9953238 A1 WO 9953238A1
Authority
WO
WIPO (PCT)
Prior art keywords
linear
width
enclosure
light source
source
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1999/006328
Other languages
English (en)
French (fr)
Inventor
Hefen Lin
Jerry Wayne Kuper
Lawrence Wayne Shacklette
Michael James Mcfarland
Han Zou
Scott M. Zimmerman
John Colvin Wilson
Karl W. Beeson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honeywell International Inc
Original Assignee
AlliedSignal Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AlliedSignal Inc filed Critical AlliedSignal Inc
Priority to JP2000543759A priority Critical patent/JP2002511684A/ja
Priority to EP99914065A priority patent/EP1071906B1/en
Priority to CA002329437A priority patent/CA2329437C/en
Priority to AU31995/99A priority patent/AU3199599A/en
Priority to DE69917253T priority patent/DE69917253T2/de
Publication of WO1999053238A1 publication Critical patent/WO1999053238A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0005—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type
    • G02B6/001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being of the fibre type the light being emitted along at least a portion of the lateral surface of the fibre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/005—Reflectors for light sources with an elongated shape to cooperate with linear light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/54—Lamp housings; Illuminating means
    • G03B27/542—Lamp housings; Illuminating means for copying cameras, reflex exposure lighting
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/84—Systems specially adapted for particular applications
    • G01N21/88—Investigating the presence of flaws or contamination
    • G01N21/8806—Specially adapted optical and illumination features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/003—Lens or lenticular sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031—Reflecting element, sheet or layer

Definitions

  • the present invention generally relates to high-efficiency, linear
  • Irradiance is defined as the light flux per unit area
  • W/cm 2 watts per square centimeter
  • Radiance is the brightness of the light. Radiance can be expressed, for example,
  • steradian is the unit of solid angle.
  • an aperture lamp generally has lower light emission
  • a linear illumination system with high output irradiance is desired in order to illuminate a narrow strip of the area being scanned or photocopied.
  • illumination assembly for such a device commonly consists of a bare linear light
  • a specular reflector is a mirror-like reflector with a smooth surface and has the
  • incident and reflection angles are measured relative to the direction normal to the
  • an illumination source for certain other applications such as flat panel displays, an illumination
  • Such systems are commonly configured with one or more illumination sources, a waveguide or
  • amount of light extracted from the system is proportional to the number of
  • edges having a small surface area limiting the size of the illumination source that
  • tubular fluorescent lamps having the same side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side side-side
  • the first type is shown in cross section as aperture lamp 10 in Figure 1.
  • the lamp is composed of a hollow glass tube 12 having a phosphor coating 14
  • the center of the tube is filled with a mixture of gases which, when excited by an
  • the ultraviolet light strikes the phosphor coating 14 and
  • a typical phosphor coating is also a diffuse reflector.
  • a diffuse reflector is a reflector that scatters incident light into a range
  • Diffuse reflectors typically have high reflectivity only when the
  • reflective coating is relatively thick (e.g. about 0.15 mm or greater).
  • reflective phosphor coating on the inside of an aperture lamp is, by necessity, significantly thinner than 0.15 mm resulting in poor reflectivity (on the order of
  • aperture lamp 50 The lamp has a glass
  • a phosphor coating 54 Inside the glass tube is a phosphor coating 54 and an additional phosphor coating 56.
  • coatings must be very thin and the selection of coating materials is very limited so as not to interfere with the operation of the lamp. No organic materials are
  • the reflectivity of the coatings is not as high as desired.
  • illumination sources which utilize external, highly reflective enclosures incorporating one or more linear openings in order to achieve improved source
  • the linear illumination source comprises: (a) a linear light source having a width j in a direction perpendicular to the long axis of the linear
  • a linear light source is defined as a light source
  • linear light source may be comprised of a single element or may be a linear array
  • linear light source is an array
  • a linear opening is defined as an
  • linear illumination system comprises: (a) a linear light source having a width wi
  • the external reflective enclosure has a maximum inside width w , and wherein the external reflective enclosure has at least one linear opening of
  • optical element in close proximity to at least one linear opening.
  • element may include, for example, a cylindrical rod lens, a lenticular lens, an
  • aspherical lenticular lens a lenticular prism, an array of lenticular lenses, an array
  • lenticular we mean a linear optical element having the cross-section (in one
  • Figure 1 is a schematic cross-sectional diagram of an internal aperture
  • Figure 2 is a schematic cross-sectional diagram of an alternative internal
  • Figure 3 is a schematic cross-sectional diagram of a linear illumination source
  • Figures 4 and 5 are respectively, schematic cross-sectional and perspective
  • Figures 6 and 7 are respectively, schematic cross-sectional and perspective
  • Figure 8 is a schematic cross-sectional diagram of another linear
  • Figure 9 is a schematic cross-sectional diagram of a linear illumination
  • Figures 10 and 11 are, respectively, schematic cross-sectional and
  • Figure 12 is a schematic cross-sectional diagram of a linear illumination
  • Figure 13 is a schematic cross-sectional diagram of a linear illumination
  • CPC parabolic concentrator
  • Figure 14 is a schematic cross-sectional diagram of a linear illumination
  • Figure 15 is a plot of intensity (irradiance) versus detector position.
  • Figure 16 is a plot of intensity (irradiance) versus detector position.
  • Figure 17 is a plot of relative output versus opening width.
  • Figure 18 is a plot of intensity (irradiance) versus detector position.
  • One embodiment of this invention is a linear illumination source 100
  • Linear illumination source 100 is comprised
  • linear light source 102 that is partially surrounded by an external enclosure
  • the linear light source 102 may be centered in the external enclosure 104 or
  • the width of the linear light source is 110, the maximum
  • inside width of the external enclosure is 112, and the maximum width of the
  • linear opening is 114.
  • the external enclosure 104 is constructed from a transparent material, the external enclosure may completely surround the
  • the linear light source 102 can be any source that emits light. Exemplary
  • linear light sources include, but are not limited to, one or more of the following
  • LEDs light emitting diodes
  • linear light source placed in a row is a linear light source.
  • the single or multiple elements of the linear light source may emit light of one color, multiple colors, or white light
  • Figure 3 can emit light in all directions.
  • a fluorescent lamp is an example of a
  • linear light source 102 that emits light in all directions.
  • 116 may be reflective, transmissive or both.
  • the reflective layer 106 is critical if the linear light source 102 is a fluorescent
  • the gap 118 can act as an insulating layer
  • the gap is greater than about 10% of the width
  • the external enclosure 104 shown in Figure 3 can have any cross-
  • sectional shape including, but not limited to, circular, elliptical, oval, cusp-
  • the linear opening 108 preferably has a maximum width 114
  • the maximum width 114 of linear opening 108 ranges from
  • the maximum width 114 of linear opening 108 is about 3% to about 75% of the maximum inside width 112 of the external enclosure. Most preferably, the maximum width 114 of linear opening 108
  • linear light source 102 is a tubular fluorescent
  • the maximum width 114 of linear opening 108 ranges from
  • the width 114 of the linear opening 108 ranges from about 20% to
  • opening 108 may be uniform along the length of the linear light source or the
  • width of linear opening 108 may vary along the length of the linear light source in
  • the aperture can be widened at any point along the length of the lamp where the
  • lamp output is low in order to provide a relatively constant and uniform output
  • the reflective layer 106 may be constructed from any material that reflects
  • the reflective layer may be a diffuse reflector, a specular reflector, or a
  • Diffuse reflectors can be made that have very high reflectivities (for example, greater than 95% or greater than 98%). However, diffuse reflectors
  • diffuse reflectors with reflectivities greater than 98% are typically several millimeters thick.
  • diffuse reflectors include, but are not limited to, fluoropolymer
  • TeflonTM films of barium sulfate
  • porous polymer films containing tiny air channels such as polyethersulfone and
  • composites utilizing reflective filler materials such as, for example, titanium
  • structural material is employed as a reflective material, such as titanium dioxide
  • the structural support 104 can be combined with the reflective layer
  • specular reflective materials have reflectivities ranging from about
  • specular reflective materials include, but
  • the thickness of the metallic coating may range from about 0.05 ⁇ m to
  • a diffuse reflector that is backed by a specular reflector.
  • the efficiency of illumination source 100 can be defined as the percentage
  • linear light source 102 before escaping from linear opening 108 or before being
  • the light can be reflected makes it very important that the reflectivity of the
  • reflecting layer 106 be as close to 100% as the practical considerations of space
  • reflectivity of the reflector is increased to 95% per reflection and the light reflects
  • the reflectivity of the present invention is greater than 95%.
  • 14 material employed for layer 106 is preferably greater than 90%, more preferably
  • linear light source 152 having width 160 is partially
  • the linear opening 158 is dimension 164.
  • the external reflective enclosure 154 shown in Figures 4 and 5 can have any cross-sectional shape including, but not
  • linear opening is limited to, circular, elliptical, oval, cusp-shaped, or faceted.
  • the 158 preferably has a maximum width 164 that is less than the maximum inside width 162 of the external reflective enclosure 154. More preferably, the
  • maximum width 164 of linear opening 158 ranges from about 3% to about 75%
  • the maximum width 164 of linear opening 158 ranges from about 5%
  • linear light source 152 is a tubular fluorescent lamp
  • the maximum width 164 of linear opening 158 ranges from about 10%
  • the width 160 of the linear light source is about 100% of the width 160 of the linear light source. More preferably, the
  • width 164 of the linear opening 158 ranges from about 20% to about 90% of the
  • the width of the linear opening 158 may be
  • 158 may vary along the length of the linear light source in order to change the
  • the structural material for the external reflective enclosure is a diffuse reflector. Examples of diffuse reflectors
  • the reflective material can be cut, formed, extruded
  • 200, 300, 350, 400, 450, and 500 are engineering thermoplastics which have been
  • titanium dioxide rutile and anatase
  • aluminum oxide aluminum oxide
  • zinc oxide aluminum oxide
  • Preferred materials also include
  • the primary particle size can be much finer, as dispersed in the polymer
  • the filler particles or voids preferably lie in the size range from about 0.1
  • microns to about 3.0 microns and most preferably from about 0.1 microns to
  • the optimal size of a filler particle may be predicted from the
  • n is the index of refraction of the matrix polymer and ⁇ is
  • Thermoplastics useful in this invention are preferably non-yellow and include a
  • extrusion such as, for example, ABS, poly (methyl methacrylate) poly(ethylene
  • PET poly(butylene terephthalate)
  • PBT poly(butylene terephthalate)
  • polypropylene nylon 6
  • nylon 66 polycarbonate, polystyrene, poly(phenylene oxide), and blends and
  • the linear light source 202 having width 210 is embedded
  • each linear opening 208 is dimension 214.
  • the light source 202 and the linear opening 208 may be adjacent to each other.
  • external reflective enclosure 206 may be constructed from a diffuse reflective
  • linear light source 202 illustrated in Figures 6 and 7 preferably emits light into a
  • linear light source 202 examples include, but are not limited to, light emitting
  • the external reflective enclosure 204 can be any suitable reflective enclosure.
  • linear light source 202 is an array of
  • linear light source 202 may have a very small light emitting surface. If the linear light source 202
  • the external reflective enclosure 204 can mix the colors to
  • the linear light source is, for example, a tubular fluorescent
  • the linear light source is
  • the external enclosure 256 may be constructed from a reflective
  • the external enclosure is constructed from a non-reflective or transparent material, an
  • 256 and/or reflecting layer 258, may be constructed from diffuse reflective
  • Figure 8 is similar to Figure 3 except that in
  • the gap is less than 10% of the lamp
  • the linear light source is a fluorescent lamp, removing the gap can
  • 19 fluorescent lamp typically has a reflectivity of approximately 60-80% with most
  • external enclosure 256 is constructed from a transparent material and a reflective
  • the external enclosure 256 may completely surround the glass envelope 252 of the fluorescent lamp. However, an opening 264 must still be provided.
  • illumination source An example of the optional configuration would be to use a
  • the shrink tubing can be heated causing
  • the linear illumination systems may include additional
  • optical elements such as, for example, waveguides, cylindrical rod lenses,
  • lenticular lenses aspherical lenticular lenses, arrays of lenticular lenses, prisms,
  • optical detectors arrays of lenticular prisms, reflectors, concentrators and collimators.
  • elements may be used to shape, focus, collimate, or project the light being emitted
  • Figures 3-8 may be used with any of the optical elements in order to make
  • additional linear illumination systems may also be used in combination, such as the lens of Figure 10 together with the additional optical elements.
  • stage CPC's in series may be employed.
  • Linear illumination system 300 is comprised of a linear illumination source 320
  • linear illumination source 320 is
  • a linear light source 302 and a external reflective enclosure 304.
  • opening 308 in external reflective enclosure 304 allows light to pass from the
  • linear illumination source 320 to an optical waveguide 316.
  • optical waveguide 316 The optical
  • TLR total internal reflection
  • linear illumination systems include edge-lit illumination systems for flat panel
  • system 350 is comprised of linear illumination source 370 and a lens 366.
  • linear illumination source 370 is illustrated to be of the type
  • a linear opening 358 in the external reflective enclosure 354 allows light to pass from the linear illumination source 370 to the
  • linear opening 358 has a maximum width 364 that
  • the maximum width 364 of the linear opening 358 ranges
  • linear light source 352 is a tubular
  • the width 364 of the linear opening 358 ranges from about
  • lens 22 20% to about 90% of the width 360 of the linear light source.
  • lens 22 20% to about 90% of the width 360 of the linear light source.
  • 366 include, but are not limited to, a lenticular lens, an aspherical lenticular lens,
  • a cylindrical rod lens a plano-convex lenticular lens, a double-convex lenticular
  • Lens 366 may be constructed from any material
  • Linear illumination systems may be used in many scenarios
  • Figure 12 illustrates another embodiment of this invention. Linear
  • illumination system 400 is comprised of linear illumination source 430 and a
  • source 430 is illustrated to be of the type shown in Figure 4 and is, in turn,
  • External reflective enclosure 404 has a linear opening 408 with a maximum width
  • Transparent optical element 416 has an input
  • element 416 also includes a straight section with parallel sidewalls 434 and 436,
  • optical element 416 is preferably greater than the input width 426 of the tapered
  • the output width 428 of the optical element 416 is at
  • transparent optical element 416 may also be planar, curved, or faceted.
  • planar, curved, or faceted Preferably
  • the output surface 424 is a curved lenticular lens, whereby the lens may have a
  • single radius of curvature may be parabolic in shape, or may have some general shape having no single radius of curvature. More preferably, output surface 424
  • radius of curvature R has a single radius of curvature R, where the radius of curvature R may range
  • reflections may occur by TLR if the sidewalls 420, 422, 434, and 436 are uncoated
  • Output surface 424 may result in a light output beam that is either
  • FIG. 13 illustrates another embodiment of this invention.
  • illumination system 450 is comprised of an illumination source 476 and a tapered
  • linear illumination source 476 is
  • the illumination source 476 is
  • the tapered optical structure 466 is a solid structure (not
  • the light input end 468 of tapered optical structure 466 is a
  • optical structure 466 is greater than the input width 478.
  • width 480 of the tapered optical structure 466 is at least two times the input width
  • tapered optical waveguide has a parabolic shape or the shape of a
  • the tapered optical structure 466 may
  • structure 466 may be a hollow structure with surfaces 470 and 472 coated with a
  • optical structure 466 at input end 468 reflects from surfaces 470 and 472 and
  • the light at the output end 474 of the taper is more collimated than the light
  • optical structure 466 is fabricated from a
  • Linear illumination system 500 is comprised of linear
  • illumination source 520 and an array 516 of lenticular optical elements 518.
  • linear illumination source 520 is illustrated to be of the type shown in Figure 4.
  • Linear illumination source 520 is further comprised of linear
  • the lenticular optical elements 518 may include lenticular
  • optical elements 518 are lenticular prisms, the sidewalls of the prisms may be
  • lenticular optical elements 518 are lenticular
  • the lenses may have one radius of curvature, multiple radii of curvature, or
  • optical elements is to further shape or collimate or focus the light emerging from
  • This example illustrates forming a reflector using a combination of a layer
  • SilverluxTM (3M) having a reflectance of 92% was placed on the back side of the
  • aperture lamp having an internal aperture (utilizing the prior art configuration
  • the commercially available internal aperture lamp was a 3 mm diameter
  • a second lamp (the same length as the preceding aperture lamp) was
  • compositions) as the preceding aperture lamp This lamp was tightly wrapped
  • 29 specular reflective materials was made up of a 0.25 mm (0.010 inch) thick sheet of FuronTM, a polytetrafluoroethylene diffuse reflective material purchased from
  • the illumination source was placed inside an integrating sphere and the total light output was measured.
  • irradiance from the standard internal aperture lamp was 3.4 mW/cm 2 .
  • a linear illumination source was constructed utilizing the configuration
  • the lamp was driven by an inverter using an
  • a external reflective enclosure surrounded the lamp except for a linear opening whose width could be adjusted.
  • the external reflective enclosure was
  • SpectralonTM is a diffuse reflecting solid whose reflectivity depends on the
  • width of the oval enclosure was approximately 7.0 mm and a minimum inside
  • plano-convex cylinder lens was placed outside the enclosure and approximately
  • the detector was moved from side to side over a range of approximately 30 mm to map out the shape of the irradiance distribution perpendicular to the long axis of the linear illumination
  • a linear illumination system was constructed utilizing the configuration
  • the light source was a cold-cathode
  • the lamp was driven by an inverter using an inverter input
  • the external reflective enclosure was constructed from two pieces of SpectralonTM (from Labsphere Inc.). SpectralonTM is a diffuse
  • SpectralonTM a section of SpectralonTM that is 3 mm thick has a reflectivity of 97.2%.
  • the two pieces of reflecting material were machined such that the shape
  • the maximum inside width of the oval enclosure was approximately 7.0 mm and a minimum inside width of the oval enclosure was
  • the opening width is less than
  • the opening width is only approximately 16% of the maximum internal
  • the detector was moved from side to side over a range of
  • the opening width and is highest for the widest opening as shown in Figure 17.
  • the normalized peak irradiance is inversely related to the opening width and is
  • a linear illumination source was constructed that included a linear light
  • the linear light source was a cold-cathode fluorescent lamp that had a diameter of 2.6 mm and a length of 268 mm.
  • the external enclosure was constructed from an acrylic tube that had
  • Device 1 was a commercially available 3 mm diameter cold-cathode aperture
  • the lamp was placed inside a clear acrylic enclosure but no reflective
  • Devices 3 and 4 are examples of
  • Devices 3 and 4 utilized a second lamp obtained
  • SpectralonTM is a diffuse reflecting solid whose
  • reflecting material were machined such that the shape of the enclosure was oval.
  • the maximum inside width of the oval enclosure was approximately 7.0 mm and
  • a minimum inside width of the oval enclosure was approximately 4.6 mm.
  • the detector was moved from side to side over a range of
  • Device 1 (the aperture lamp alone) had the worst peak
  • non-aperture lamp used with a reflective enclosure taught by this invention had a
  • Examples include, but are not limited to: scanners, facsimile machines,
  • photocopiers and direct illumination devices for commercial, office, residential,
  • displays e.g. flat panel displays
  • computer automotive, military,

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Pathology (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Lenses (AREA)
  • Liquid Crystal (AREA)
PCT/US1999/006328 1998-04-16 1999-03-23 Linear illumination sources and systems Ceased WO1999053238A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP2000543759A JP2002511684A (ja) 1998-04-16 1999-03-23 線形投光源およびシステム
EP99914065A EP1071906B1 (en) 1998-04-16 1999-03-23 Linear illumination sources and systems
CA002329437A CA2329437C (en) 1998-04-16 1999-03-23 Linear illumination sources and systems
AU31995/99A AU3199599A (en) 1998-04-16 1999-03-23 Linear illumination sources and systems
DE69917253T DE69917253T2 (de) 1998-04-16 1999-03-23 Lineare lichtquellen und beleuchtungssysteme

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/061,562 1998-04-16
US09/061,562 US6186649B1 (en) 1998-04-16 1998-04-16 Linear illumination sources and systems

Publications (1)

Publication Number Publication Date
WO1999053238A1 true WO1999053238A1 (en) 1999-10-21

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PCT/US1999/006328 Ceased WO1999053238A1 (en) 1998-04-16 1999-03-23 Linear illumination sources and systems

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US (2) US6186649B1 (https=)
EP (1) EP1071906B1 (https=)
JP (1) JP2002511684A (https=)
KR (1) KR100614123B1 (https=)
AU (1) AU3199599A (https=)
CA (1) CA2329437C (https=)
DE (1) DE69917253T2 (https=)
TW (1) TW449728B (https=)
WO (1) WO1999053238A1 (https=)

Cited By (3)

* Cited by examiner, † Cited by third party
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WO2001040703A1 (en) * 1999-11-29 2001-06-07 Jeffrey Kenneth Procter Light emitting diode reflector
EP1089069A3 (en) * 1999-10-01 2001-08-29 CorkOpt Limited Linear illumination
WO2008005610A1 (en) * 2006-07-05 2008-01-10 General Electric Company Organic illumination source and method for controlled illumination

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US6186649B1 (en) * 1998-04-16 2001-02-13 Honeywell International Inc. Linear illumination sources and systems
US6921184B2 (en) * 1999-08-11 2005-07-26 Brian N. Tufte Elongated illumination device
US6733161B2 (en) 1999-08-11 2004-05-11 Brian N. Tufte Elongated carrier for bumper member
US6817731B2 (en) * 1999-08-11 2004-11-16 Brian N. Tufte Elongated illumination device
US6869202B2 (en) * 1999-08-11 2005-03-22 Brian N. Tufte Lighting apparatus
US6837591B2 (en) * 1999-08-11 2005-01-04 Tufte Brian N Kitchen appliance with elongated light source
US6883931B2 (en) * 1999-08-11 2005-04-26 Brian N. Tufte Elongated illumination device
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TW449728B (en) 2001-08-11
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US6550942B1 (en) 2003-04-22
CA2329437C (en) 2007-07-31
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US6186649B1 (en) 2001-02-13
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CA2329437A1 (en) 1999-10-21
EP1071906A1 (en) 2001-01-31

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