With Or Including Coaxial Reflecting Surfaces Patents (Class 362/302)
  • Patent number: 10788170
    Abstract: Optical systems for linear lighting, particularly linear lighting that is installed in a channel, are disclosed, as are light fixtures that use these optical systems. The optical systems have multiple optical elements, usually a first lens adapted to be positioned close to a strip of linear lighting installed in a channel, and a second lens adapted to be positioned farther from the strip of linear lighting. In some cases, the first optical element may be a diffuser. The two optical elements are optically aligned with one another such that light from the first optical element reaches the second optical element. The multiple optical elements may be adapted to physically support one another, and to engage with structure provided by the channel for securing a cover. Some optical systems may be adapted to compensate for variations in the color or intensity of the emitted light.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: September 29, 2020
    Assignee: Elemental LED, Inc.
    Inventor: Raymond G. Bryan
  • Patent number: 10754189
    Abstract: An object of the present invention is to provide a backlight film that uses a wavelength conversion film used for a liquid crystal display or the like, has satisfactory durability, and is able to emit light without color unevenness. The object is achieved by including a wavelength conversion film having a wavelength conversion layer and a gas barrier film that sandwich the wavelength conversion layer; and at least one reflective layer provided on one main surface of the wavelength conversion film and causing a film thickness distribution of the reflective layer to be ±5% or less.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: August 25, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Satoshi Kuniyasu, Tatsuya Oba
  • Patent number: 10524646
    Abstract: A light source apparatus includes: a light source; a light source driving section; a light detection section; a temperature detection section; and a control section being configured to, when determining that detected brightness is outside a range of brightness set for detecting abnormality in the light source or the light detection section and detected temperature is within a range of temperature set for detecting the abnormality in the light source or the light detection section, cause the light source driving section to perform driving of the light source for a case of abnormality in the light detection section, and when determining that the detected brightness is outside the range of brightness and the detected temperature is outside the range of temperature, cause the light source driving section to perform driving of the light source for a case of abnormality in the light source.
    Type: Grant
    Filed: April 4, 2017
    Date of Patent: January 7, 2020
    Assignee: OLYMPUS CORPORATION
    Inventors: Aiko Sakai, Yusuke Yabe, Tomoya Takahashi, Kazue Hongo
  • Patent number: 10507763
    Abstract: An indirect lighting structure for a vehicle roof provides indirect lighting to at least a part of a roof glass through a light guide formed along a guide rail. The indirect lighting structure includes: a guide rail configured to support a roof glass positioned on the guide rail; a light source unit positioned at one end in a longitudinal direction of the guide rail; and a light guide which is configured to be in contact with the light source unit and positioned along the guide rail, in which the light guide is configured such that at least a part of the light guide is in contact with and inserted into the guide rail so as to guide light introduced from the light source to illuminate a pattern portion.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: December 17, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Webasto Donghee Holdings
    Inventors: Hoo Sang Park, Chang Min Park
  • Patent number: 10371351
    Abstract: An illumination device including an upper casing, a transparent bottom casing, a light source module and a reflection layer is provided. The upper casing has a lower surface. The transparent bottom casing has an upper surface. The light source module is disposed on the lower surface of the upper casing. The reflection layer is extended between the upper surface of the transparent bottom casing and the lower surface of the upper casing for reflecting the light emitted by the light source module.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: August 6, 2019
    Assignees: LITE-ON ELECTRONICS (GUANGZHOU) LIMITED, LITE-ON TECHNOLOGY CORPORATION
    Inventor: Bing-Yu Wu
  • Patent number: 10088127
    Abstract: A member for controlling luminous flux according to an exemplary embodiment of the present invention includes an optical path changing unit embedded in a matrix and including scattering particles scattering incident light, and an optical direction adjustment unit including a coupling surface attached to the optical path changing unit to receive the light scattered from the optical path changing unit, and a refractive surface refracting the received light and emitting the refracted light, whereby an optical diffusion performance of the member for controlling luminous flux according to an exemplary embodiment of the present invention can enhance an optical diffusion performance.
    Type: Grant
    Filed: December 14, 2012
    Date of Patent: October 2, 2018
    Assignee: LG INNOTEK CO., LTD.
    Inventors: Gi Seok Lee, Eun Sung Seo, Hyun Ho Choi, Chang Hyuck Lee, Ki Cheol Kim
  • Patent number: 9810418
    Abstract: A solid state lighting (SSL) with a solid state emitter (SSE) having thermally conductive projections extending into an air channel, and methods of making and using such SSLs. The thermally conductive projections can be fins, posts, or other structures configured to transfer heat into a fluid medium, such as air. The projections can be electrical contacts between the SSE and a power source. The air channel can be oriented generally vertically such that air in the channel warmed by the SSE flows upward through the channel.
    Type: Grant
    Filed: August 12, 2010
    Date of Patent: November 7, 2017
    Assignee: Micron Technology, Inc.
    Inventor: Scott E. Sills
  • Patent number: 9521287
    Abstract: A light guide for use in an image reading apparatus. The light guide extends in a predetermined direction. The light guide comprises an emitting surface, through which light rays entering the light guide are emitted, and a reflecting surface configured to reflect the light rays to the emitting surface. A cross-sectional surface of the light guide, which is a sectional surface of the light guide along a plane orthogonal to the predetermined direction in which the light guide extends, has a shape including a combination of an ellipse and a parabola. The parabola on the cross-sectional surface of the light guide defines the reflecting surface. A focal point of the parabola is located on a first focal point of the ellipse that is closer to the reflecting surface.
    Type: Grant
    Filed: January 15, 2015
    Date of Patent: December 13, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Akira Yamamura, Masahiko Tanaka
  • Patent number: 9488343
    Abstract: An interchangeable lighting assembly is disclosed which comprises an inner plate member having depending leg portions each having an aperture for receiving a fastening device, an interchangeable cladding member having an aperture that is aligned with one of the apertures of one of the depending leg portions of the inner plate member, a fastening device for securing the interchangeable cladding member to the inner plate member through the aperture of the interchangeable cladding member aligned with the aperture of the depending leg portion, and a light source assembly connected to the inner plate member and depending therefrom.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: November 8, 2016
    Inventor: Mark Kaner
  • Patent number: 9261269
    Abstract: An automated luminaire which allows for the selection of a diffuser or a hot mirror which is mounted to engage the light beam at an angle non perpendicular to the central axis of the light beam and nonparallel or not in the same plane as the diffuser. The selector is articulated in a manner to automatically engage a selector based on what other light modulators are selected to engage the light beam and to automatically oscillate or scan when there is a likelihood of damage to the hot mirror or diffuser based on how long it is engaged and/or light intensity and/or other modulators selected and or temperature sensor data in the luminaire.
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: February 16, 2016
    Assignee: ROBE Lighting s.r.o.
    Inventors: Pavel Jurik, Josef Valchar
  • Patent number: 9091417
    Abstract: A lighting apparatus is provided with a housing having an upper assembly, a lower assembly, and a middle assembly. A lighting module is positioned within the housing in which the lighting module includes at least one light emitting diode (LED). A reflector is positioned within an outer lens of the middle portion of the housing above the lighting module. A reflector plate is positioned within the housing at approximately the same level or below the lighting module. The reflector plate is configured to reflect light emitted by the at least one LED after the light is reflected by the reflector. The outer lens is configured to refract light emitted by the at least one LED after the light has been reflected by the reflector.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 28, 2015
    Assignee: Cree, Inc.
    Inventors: Mario A Castillo, Kurt S Wilcox, William L. Dungan, Russell S. Schultz, Brian Kinnune
  • Patent number: 8929697
    Abstract: A light injection system includes a radiation source, an optical waveguide, and an optical component. The radiation source emits radiation and is oriented relative to the optical waveguide such that a first portion of radiation emitted from the radiation source couples into the optical waveguide as emitted from the radiation source and a second portion of radiation emitted from the radiation source bypasses the optical waveguide as emitted from the radiation source. The optical component redirects at least some of the second portion of radiation emitted from the radiation source that would otherwise bypass the optical waveguide and enables at least some of the redirected radiation to couple into the optical waveguide instead of bypass the optical waveguide.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: January 6, 2015
    Assignee: Perceptive Pixel Inc.
    Inventor: Arlie Richard Conner
  • Patent number: 8894236
    Abstract: The invention relates to a reflector unit and a lighting device (1) having a plurality of light sources (4) and a reflection arrangement, with the light sources (4) being positioned in front of a reflection surface of the reflection arrangement, with the light beam from the light sources (4) being deflected by reflection to the main emission direction of the lighting device (1) via the reflection arrangement. According to the invention, a first reflection section (2) and a raised second reflection section (5) are provided, with the first and the second reflection sections being matched to one another such that a main light beam can be produced, in that the light from the light sources (4) first of all strikes the second reflection section (5), and then the first reflection section (2), and leaves the lighting device in the main emission direction.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: November 25, 2014
    Assignee: Ultralite Deutschland Haerle Lichttechnik GmbH
    Inventors: Kaspar Haerle, Izet Nokic
  • Publication number: 20140313739
    Abstract: An optical element that may be replaceably mounted to an LED based illumination device. The optical element includes a hollow shell reflector and a plurality of annular shell elements disposed within the hollow shell reflector at different distances from the input port of the optical element. An annular shell element that is closer to the input port of the optical element has a radius that is less than the radius of an annular shell element farther from the input port.
    Type: Application
    Filed: July 2, 2014
    Publication date: October 23, 2014
    Inventors: John S. Yriberri, Christopher R. Reed, Jim W. Li, Gerard Harbers
  • Patent number: 8770800
    Abstract: An optical element that may be replaceably mounted to an LED based illumination device. The optical element includes a hollow shell reflector and a plurality of annular shell elements disposed within the hollow shell reflector at different distances from the input port of the optical element. An annular shell element that is closer to the input port of the optical element has a radius that is less than the radius of an annular shell element farther from the input port.
    Type: Grant
    Filed: March 11, 2014
    Date of Patent: July 8, 2014
    Assignee: Xicato, Inc.
    Inventors: John S. Yriberri, Christopher R. Reed, Jim W. Li, Gerard Harbers
  • Patent number: 8740434
    Abstract: A light guide element, a light source module, and a display are provided. The display includes a display panel and the light source module. The light source module includes a light source and the light guide element, wherein light emitted by the light source is guided toward the display panel by the light guide element. The light guide element includes a plurality sidewalls and a bottom wall. The sidewalls surround the bottom wall and are connected with each other to form a light entering opening, a light exiting opening, and an inner reflection room. Each of the sidewalls and the bottom wall has at least one reflection surface, wherein the reflection surface faces the inner reflection room.
    Type: Grant
    Filed: July 14, 2011
    Date of Patent: June 3, 2014
    Assignees: Kinpo Electronics, Inc., Cal-Comp Electronics & Communications Company Limited
    Inventor: Chun-Hsien Cho
  • Patent number: 8702280
    Abstract: A light source device having: a light source; first and second light guides extending in a first predetermined direction to guide light in the first predetermined direction and irradiate a document with the light; and a confinement portion that confines light emitted by the light source and is connected to one end of the first light guide and one end of the second light guide, in which the light confined in the confinement portion is reflected off both first and second reflection surfaces provided in the confinement portion, and thereby travels through the first and second light guides in the first predetermined direction.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: April 22, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Masahiko Tanaka
  • Patent number: 8662711
    Abstract: A lighting device is provided. The lighting device includes an optical reflection plate, a light holder, and at least one light source. The optical reflection plate includes a non-reflective region located in the center of the optical reflection plate, and a plurality of reflection regions surrounding the non-reflective region in sequence. The light holder is located on the non-reflective region of the optical reflection plate and includes a circle side-light concave portion. A light-emitting opening of the side-light concave portion faces to the reflection regions. The light source is located in the side-light concave portion of the light holder. When the light source emits light, the light emitted from the light source is reflected by the reflection regions.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: March 4, 2014
    Assignee: Lextar Electronics Corporation
    Inventors: Sheng-Ping Chen, Chi-Cheng Cheng, Chun-Hung Liu, Shang-Jung Hsieh
  • Patent number: 8646949
    Abstract: An optical emitter enabling conversion of light from a light source. The optical emitter includes a first conic reflector defining an aperture for receiving the light source, a second conic reflector opposite the first conic reflector for collimating light emitted by the light source, and a volumetric light conversion element between at least a portion of the first reflector and at least a portion of the second reflector. The optical emitter can also include a convex mirror adjacent the vertex of the second conic reflector, and an elliptical element adjacent the first conic reflector. The light conversion element can include phosphor dispersed in a resin to convert light from a first wavelength to light of a second, longer, wavelength, wherein converted light is emitted from the light conversion element.
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: February 11, 2014
    Assignee: LumenFlow Corp.
    Inventors: Harold W. Brunt, Jr., Paul L. Bourget
  • Patent number: 8641239
    Abstract: A lighting assembly utilizing a reflective body for use with a light source to uniformly disperse the light from the light source. The reflective body includes a lower array of first reflectors arranged about a central axis. Each of the first reflectors form an obtuse angle with the next adjacent first reflector. The reflective body also includes an upper array of second reflectors arranged about the central axis. Each of said second reflectors include a left face and a right face. The upper array defines obtuse angles between next adjacent second reflectors. Additionally, reflex angles are defined between the left and right faces of the second reflectors. The combination of angles evenly disperse the light supplied from the light source to provide a pleasant glow for illuminating an area below the lighting assembly without causing hot spots.
    Type: Grant
    Filed: January 8, 2010
    Date of Patent: February 4, 2014
    Assignee: Best Lights, Inc.
    Inventor: Gary D. Yurich
  • Patent number: 8556471
    Abstract: A lighting module may include a light source; a lens arranged at a distance from the light source; and a reflector; wherein the lens is configured and arranged to have a wide-angle emission characteristic and to direct a proportion of the light incident from the light source onto the reflector, wherein the proportion is at least 30%.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: October 15, 2013
    Assignees: OSRAM Gesellschaft mit beschraenkter Haftung, OSRAM Opto Semiconductors GmbH
    Inventors: Monika Pahlke, Katrin Schroll, Hartmut Billy, Julius Augustin Muschaweck
  • Patent number: 8475006
    Abstract: A dark field illuminator that includes: (i) a light source adapted to provide ring of light characterized by uniform intensity distribution; (ii) a collimating ring adapted to receive the ring of light and to direct collimated light beams towards an area of an inspected object such that different points within the area are illuminated by identical cones of light characterized by an incidence angle; and wherein the collimating ring and the light source are co-centric to an optical axis of the dark field illuminator.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: July 2, 2013
    Assignee: Camtek Ltd.
    Inventor: Zehava Ben-Ezer
  • Patent number: 8333488
    Abstract: Embodiments of the present invention relate to a compact optical assembly which improves collimation of light produced by multiple LED light sources in a light engine. A shaped primary reflector located over the light engine reflects the light toward a larger shaped secondary reflector. The shapes of the reflectors are selected to cooperatively produce a highly collimated light beam. Color mixing may be improved by providing a plurality of facets on the reflective surfaces of at least one of the primary reflector or the secondary reflector.
    Type: Grant
    Filed: January 17, 2008
    Date of Patent: December 18, 2012
    Assignee: Lighting Science Group Corporation
    Inventor: Edward Bailey
  • Patent number: 8292467
    Abstract: The invention provides an illumination device (1) comprising a lighting unit (2). The lighting unit (2) comprises a light source (100) and a substantially flat light guide (200), arranged to collimate light source light (111). The light guide (200) has an entrance window (210), an edge window (220), a first light guide surface (201), a second light guide surface (202), a first side edge (230) and a second side edge (240). One or more of the first light guide surface (201) and the second light guide surface (202) comprise a plurality of grooves (300). In this way, latitudinal collimation is obtained.
    Type: Grant
    Filed: May 25, 2009
    Date of Patent: October 23, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Michel Cornelis Josephus Marie Vissenberg, Anthonie Hendrik Bergman, Tim Dekker, Giovanni Cennini
  • Patent number: 8197101
    Abstract: A concave reflecting surface of a reflector for use in a light emitting device has micro reflector segments protruded therefrom in multiple stages and in multiple radial columns, the micro reflector segments each having a convex curved surface which is defined by a locus of a circular arc moved in parallel in a radial direction of the concave reflecting surface, and a radius of the convex curved surface, in each of the reflection regions, is set to be smaller when the convex curved surface is positioned closer to a point on which light emitted from each of the directional light sources and traveling on the light axis is incident, and is set to be larger when the convex curved surface is positioned more distant from the point.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: June 12, 2012
    Assignee: Phoenix Electric Co. Ltd.
    Inventors: Haruo Kokado, Yoshihiro Shimoda
  • Patent number: 8087805
    Abstract: A motor-driven, displaceable-head floodlight unit according to one or more embodiments is described. The floodlight unit is arranged to generate a plurality of light and projection effects used in stagecraft and performances, at least several LED sources being configured as the source of light in the floodlight unit. The light emission from several LED sources is collected by at least one first mirror and deflected to a second mirror. The second mirror is arranged to collimate the light from the first mirror incident thereon and transmit the light.
    Type: Grant
    Filed: June 23, 2008
    Date of Patent: January 3, 2012
    Inventor: Rüdiger Lanz
  • Patent number: 8028537
    Abstract: Disclosed exemplary solid state light fixtures use optical cavities to combine or integrate light from LEDs or the like. In such a fixture, the cavity is formed by a light transmissive structure having a volume, and a diffuse reflector that covers a contoured portion of the structure. A heat sink member supports a flexible circuit board so as to position the light emitters to couple light to the transmissive structure and provide effective heat dissipation. The circuit board has flexible tabs mounting the emitters. When installed in the fixture, the tabs bend and the emitters press against a sufficiently rigid periphery of the light transmissive structure. TIM may be compressed between the heat sink member and the opposite surface of each tab. Heat conductive surface pads and heat conductors through vias through the tabs conduct heat from the emitters to the heat sink member, e.g. through the TIM.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: October 4, 2011
    Assignee: ABL IP Holding LLC
    Inventors: Roger T. Hanley, Robert M. Becker, Steven S. Lyons, David P. Ramer, Jonathan A. Robbins, Chad N. Sanders, J. Michael Phipps
  • Patent number: 8029152
    Abstract: A package includes a base body having a mounting portion for mounting a light-emitting device, a frame-shaped first reflection member attached to the upper surface of the base body, an inner peripheral surface of which is shaped into a first light reflecting surface and surrounds the mounting portion, and a frame-shaped second reflection member attached to the upper surface of the base body, with a spacing secured between an inner peripheral surface of the second reflection member and an outer peripheral surface of the first reflection member, the inner peripheral surface surrounding the first reflection member and having a second light reflecting surface at a location above an upper end of the first reflection member.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: October 4, 2011
    Assignee: Kyocera Corporation
    Inventors: Fumiaki Sekine, Daisuke Sakumoto, Yuki Mori, Mitsuo Yanagisawa, Shingo Matsuura
  • Patent number: 7922375
    Abstract: Light having entered a light transmitting member through a predetermined point on an optical axis undergoes internal reflection in a front surface perpendicular to the optical axis, then undergoes internal reflection again in a rear surface composed of a paraboloid of revolution having a focal point at a position of plane symmetry with the predetermined point, and then exits the front surface. A mirror-finished annular region around the optical axis in the front surface has an outer peripheral edge set to be near a position where the incident angle of the light emitted from the light emitting element is equal to a critical angle, and an inner peripheral edge near a position where the light having undergone internal reflection in the front surface enters a position immediately behind the outer peripheral edge in the rear surface.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: April 12, 2011
    Assignee: Koito Manufacturing Co., Ltd.
    Inventor: Masashi Tatsukawa
  • Patent number: 7794109
    Abstract: A light source apparatus comprises reflection mirrors, first and second lamp holding sections, wherein the reflection mirrors are provided between the first and second lamp holding section, a reflection mirror support plate to which reflection mirrors are attached, a first lamp holding section support plate to which the first lamp holding section is attached, a second lamp holding section support plate to which the second lamp holding section is attached, a first fixing member which fixes the reflection mirror support plate and the first lamp holding section support plate to each other, a second fixing member which fixes the reflection mirror support plate and the second lamp holding section support plate to each other.
    Type: Grant
    Filed: May 14, 2008
    Date of Patent: September 14, 2010
    Assignee: Ushio Denki Kabushiki Kaisha
    Inventors: Katsuoki Miyasu, Takehiko Iguchi, Hitoshi Nakabayashi
  • Patent number: 7712924
    Abstract: An optical device for effectively adjusting the F-number of an elliptical lamp is provided, the elliptical lamp for producing a focused light beam at a given focal point having a given cone angle. The optical device comprises a light interaction portion for optically interacting with the focused light beam when the light interaction portion is in general longitudinal alignment with a light emitting aperture of the elliptical lamp, the light interaction portion for triggering optical adjustment of a cone angle of at least a high cone angle portion of the focused light beam to a smaller cone angle. The optical device further comprises a light egress portion, coupled to the light interaction portion, for enabling exit of the focused light beam from the optical device with an effective cone angle smaller than the given cone angle, after the cone angle of the at least the high cone angle portion of the focused light beam has been adjusted to the smaller cone angle.
    Type: Grant
    Filed: December 26, 2007
    Date of Patent: May 11, 2010
    Assignee: Christie Digital Systems USA, Inc.
    Inventor: Joseph Ma
  • Patent number: 7631989
    Abstract: A condensing and collecting optical system comprises two asymmetric reflectors. The first and second reflectors comprise a portion of an ellipsoid or paraboloid of revolution having parallel optical axis. A source of electromagnetic radiation is placed at one of the focal points of the first reflector to produce radiation that is received by the second reflector, which focuses the radiation toward a target. To achieve maximum output coupling efficiency, the second reflector has a different focal length than the first reflector such that the radiation inputted to the target has lower angle of incidence.
    Type: Grant
    Filed: June 29, 2006
    Date of Patent: December 15, 2009
    Assignee: Wavien, Inc.
    Inventor: Kenneth K. Li
  • Patent number: 7621638
    Abstract: A light delivery technique includes optical configurations as well as the associated methods that generate a ring beam from a linear light source. In one embodiment, a remote light source module delivers illumination light to a fundus camera and/or slit lamp. In another embodiment, an arrangement combines the use of a light pipe homogenizer and a ring beam transformer for efficiently collecting light from a substantially axially linear light source, homogenizing the collected light that lacks low angle flux relative to the optical axis, and transforming the light into a ring beam with a substantially improved low angle flux distribution. In still another embodiment, light emitted from a substantially axially linear light source is directly collected by a curved surface mirror and spatially filtered into a ring beam.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: November 24, 2009
    Assignee: Clarity Medical Systems, Inc.
    Inventors: Wei Su, Yan Zhou, Yeou-Yen Cheng, Qing Chun Zhao
  • Patent number: 7578606
    Abstract: A diffuser incorporates diffuser elements (10) that each include a waveguide (12) coupled between a concentrator (14) and an inverse concentrator (16). The diffuser (44) may be disposed between a backlight (102) and a modulator (114) in a display (100). Luminance ratios of light rays emitted by a low resolution image-forming backlight (102) toward a high resolution light modulator (114) may be preserved such that, for viewing directions within the display's preferred angular viewing range, an observer perceives no significant change in the luminance of displayed images, irrespective of changes in the observer's viewing direction.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: August 25, 2009
    Assignee: Dolby Laboratories Licensing Corporation
    Inventor: Lorne A. Whitehead
  • Patent number: 7513630
    Abstract: A compact dual ellipsoidal reflector (DER) system for illuminating a target with rays of electromagnetic radiation comprises first and second molded module. The first molded module has at least a first ellipsoidal reflector section comprising an optical axis, a first focal point and a second focal point. The rays of electromagnetic radiation being directed substantially proximate to the first focal point of the first ellipsoidal reflector section and substantially converge at the second focal point of the first ellipsoidal reflector section. The second molded module has at least a second ellipsoidal reflector section comprising an optical axis, a first focal point and a second focal point.
    Type: Grant
    Filed: July 17, 2006
    Date of Patent: April 7, 2009
    Assignee: Wavien, Inc.
    Inventor: Kenneth K. Li
  • Patent number: 7461954
    Abstract: The invention provides an illumination system that can include a first reflecting mirror arranged on a rear side of a light-emitting portion of the illumination system including an arc tube, and a second reflecting mirror arranged on the front side of the light-emitting portion of an optical system.
    Type: Grant
    Filed: January 18, 2007
    Date of Patent: December 9, 2008
    Assignee: Seiko Epson Corporation
    Inventor: Takeshi Takezawa
  • Patent number: 7458701
    Abstract: An exemplary LED lamp includes a housing having an opening, a printed circuit board, at least one LED, a light reflective plate, a light reflective module and a lamp cover. The printed circuit board is positioned on a bottom of the housing. The LED is electrically connected with the printed circuit board. The light reflective plate defines at least one through hole, the LED passing through the corresponding through hole. The light reflective module includes a bottom reflective plate, at least two opposite reflective sidewalls, at least one light-shielding sheet extending at midsections from the opposing reflective sidewalls. The bottom reflective plate defines at least one first cutout, the at least one LED passing through the corresponding first cutout. The at least one light-shielding sheet defines a plurality of light holes and covers the corresponding LED. The LED lamp assembly has a uniform luminance.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: December 2, 2008
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Patent number: 7441928
    Abstract: A lighting device can include at least one LED light source having at least one LED chip, the LED light source being configured to impart a certain directivity to light emitted from the LED chip in a direction of the optical axis of the light source. A first reflector can be disposed in front of the LED light source and upwards with respect to the optical axis. The first reflector can also extend forward and above the optical axis in an inclined manner from a first side to a second side so as to reflect part of light emitted from an upper part of the LED light source with respect to the optical axis. A second reflector can be disposed substantially in parallel to, and below, the first reflector. The second reflector can be configured to reflect light from the first reflector. A third reflector can be disposed in front of the LED light source and downward with respect to the optical axis.
    Type: Grant
    Filed: April 17, 2007
    Date of Patent: October 28, 2008
    Assignee: Stanley Electric Co., Ltd.
    Inventor: Takashi Futami
  • Patent number: 7438424
    Abstract: An illumination optical apparatus and a projection type display apparatus capable of enhancing an illumination efficiency; having an ellipsoidal mirror, a light source arranged at a first focal point of the ellipsoidal mirror, a stop arranged closer to said light source side by a predetermined distance from a second focal point of said ellipsoidal mirror, and a positive refractive collimator lens for collimating a light flux emitted from the stop to a parallel light flux. A condition (0.01<L2/L1<0.06) is satisfied where, L1 is a distance from an apex of the ellipsoidal mirror to the second focal point thereof and, L2 (the light source side is a positive distance) is a distance from the second focal point of the ellipsoidal mirror to the stop.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: October 21, 2008
    Assignees: Kyocera Corporation, NEC Display Solutions, Ltd.
    Inventors: Ryuuji Yamada, Katsuyuki Takeuchi
  • Patent number: 7438437
    Abstract: An exemplary LED lamp includes a housing, a printed circuit board, at least one LED, a light reflective module and a lamp cover. The printed circuit board is positioned on a bottom of the housing. The LED electrically connects with the printed circuit board. The light reflective module includes at least one light-shielding sheet and a bottom reflective plate disposed between the printed circuit board and the light-shielding sheet. The bottom reflective plate defines at least one through hole. The LED passes through the at least one through hole correspondingly. Each light-shielding sheet defines a plurality of light holes and covers the LED correspondingly. The lamp cover is fixed on the opening of the housing. The LED lamp has a uniformity brightness.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: October 21, 2008
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Shao-Han Chang
  • Patent number: 7390106
    Abstract: The present invention comprises a method of enhancing illumination by a variety of lamp types through the use of reflective technologies, for example, replacement of expensive high intensity density of mercury vapor lamps with low wattage fluorescent tubes having at least one and in some cases, up to three reflective surfaces for focusing otherwise lost light toward a target illumination area. Further, the placement of light sources at the focal point of said reflective surfaces aids in optimizing the amount of light focused in a desired direction.
    Type: Grant
    Filed: October 27, 2006
    Date of Patent: June 24, 2008
    Inventor: Randal D. Walton
  • Patent number: 7252413
    Abstract: A light fixture is described. The light fixture includes a socket housing and a reflector housing. The socket housing includes a socket for receipt of a lamp, and a reflector housing mounting surface. The reflector housing includes a direct reflector for providing direct light onto a target lighting area and an indirect reflector for providing indirect light onto the target lighting area. The direct reflector includes a direct reflector first end, a direct reflector second end, and a direct reflector body extended between the first end and the second end. The direct reflector body extends sufficiently far to provide a cut off angle between a lamp provided in the socket and the direct reflector second end of less than about 50°. The indirect reflector extends from the direct reflector around a circumference of the direct reflector in an amount sufficient to shield a lamp provided in the socket. A facility having a plurality of ceiling mounted light fixtures, and a reflector housing are described.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: August 7, 2007
    Assignee: Orfield Laboratories, Inc.
    Inventors: Steven J. Orfield, Michael R. Role
  • Patent number: 7244050
    Abstract: A full cutoff luminaire having a housing with an open bottom, a vertically mounted lamp centrally located within the housing, a radial reflector surrounding a portion of the lamp and a downwardly extending optic lens having an open top enshrouding a lower portion of the lamp wherein light emitted from the luminaire does not exceed 90° above nadir.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: July 17, 2007
    Assignee: Genlyte Thomas Group, LLC
    Inventors: Robert Summerford, Claude Barozzini, Jerome H. Simon
  • Patent number: 7232241
    Abstract: The invention provides an illumination system that can include a first reflecting mirror arranged on a rear side of a light-emitting portion of the illumination system including an arc tube, and a second reflecting mirror arranged on the front side of the light-emitting portion of an optical system.
    Type: Grant
    Filed: September 1, 2003
    Date of Patent: June 19, 2007
    Assignee: Seiko Epson Corporation
    Inventor: Takeshi Takezawa
  • Patent number: 7213944
    Abstract: A light source apparatus includes a lamp, an ellipsoidal mirror collecting a part of light radiated from a light transmission plane of the lamp, and a spherical mirror collecting another part of the light radiated from a light transmission plane not collected by the ellipsoidal mirror and reflecting it on the ellipsoidal mirror, in which a reflection plane of the ellipsoidal mirror and the reflection plane of the spherical mirror are in a form of non-rotation symmetry to an optical axis connecting a focal position F1 corresponding to a source of luminescence of the lamp to a focal position F2 of the light collected by the ellipsoidal mirror respectively. The distance between the reflection plane of the spherical mirror and the source of luminescence of the lamp is shorter than the distance between the source of luminescence and the focus of the light collected by the ellipsoidal mirror, and a part of the reflection plane of the ellipsoidal mirror is formed around the optical axis.
    Type: Grant
    Filed: April 15, 2004
    Date of Patent: May 8, 2007
    Inventors: Yusaku Shimaoka, Shu Namba, Kazunori Tanabe
  • Patent number: 7175322
    Abstract: At an upper position of an optical axis Ax between a reflector and projection lens, a pair of left and right first additional reflectors are arranged and a pair of second additional reflectors are arranged on both the left and right sides of the pair of first additional reflectors. Each one of the first additional reflectors reflects light from the light source toward one of the second additional reflectors located on a side opposite to the one of the first additional reflector with respect to the optical axis. Each one of the second additional reflectors reflects, in a forward direction, the light reflected from the first additional reflectors without being transmitted through the projection lens.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: February 13, 2007
    Assignee: Koito Manufacturing Co., Ltd.
    Inventor: Hidetaka Tanaka
  • Patent number: 7153015
    Abstract: The invention provides an LED lighting device and method that produces high intensity, spatially uniform, white light in the near and far fields in a reduced package size that does not significantly heat the surrounding environment, wherein the white light is produced by using a phosphor layer in conjunction with a single LED.
    Type: Grant
    Filed: December 30, 2002
    Date of Patent: December 26, 2006
    Assignee: Innovations In Optics, Inc.
    Inventor: Thomas J. Brukilacchio
  • Patent number: 7147903
    Abstract: Optical devices such as backlight assemblies, according to the present invention include a multilayer optical film in which at least one of the layers comprises an oriented birefringent polymer. The multilayer optical film exhibits low absorptivity and can reflect light approaching at shallow angles as well as normal to the film.
    Type: Grant
    Filed: July 11, 2005
    Date of Patent: December 12, 2006
    Assignee: 3M Innovative Properties Company
    Inventors: Andrew J. Ouderkirk, Michael F. Weber, Sanford Cobb, Jr., David L. Wortman
  • Patent number: 7128424
    Abstract: A light source device includes a light-emitting tube and a reflector. The light-emitting tube has a light-emitting portion that generates a light beam by an electric discharge between electrodes, and sealing portions provided on both sides of the light-emitting portion. The light-emitting tube has a sub-reflection mirror that covers substantially a front half of the light-emitting portion. The reflector has a neck portion provided with an insertion hole to which the light-emitting tube is inserted, and a reflecting portion integrally formed with the neck portion and having an ellipsoidal curved reflecting surface that irradiates the light beam emitted by the light-emitting portion to align the light beam in a predetermined direction. The opening diameter of the insertion hole on the side of the reflecting surface is greater than the external diameter of the sub-reflection mirror and within the internal diameter of a valid reflection area of the reflector.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: October 31, 2006
    Assignee: Seiko Epson Corporation
    Inventors: Shohei Fujisawa, Takeshi Takezawa
  • Patent number: 7121704
    Abstract: A pair of additional reflectors are disposed face to face under a light source. The reflective surfaces of the respective additional reflectors are formed of paraboloids of revolution, with the first focal point of the reflective surface of a reflector as a focal point, and with an optical axis as the central axis of the revolution. As a result, retroreflective light from both reflectors is incident on the upper reflective region of the reflector. Thus, the spreading of the retroreflective light can be reduced based on the enhanced efficiency of utilizing the luminous flux of the light source, to the extent of the presence of the retroreflective light, as compared with the related art structure, wherein a spherical reflective surface centering on the light source is provided.
    Type: Grant
    Filed: January 13, 2004
    Date of Patent: October 17, 2006
    Assignee: Koito Manufacturing Co., Ltd.
    Inventor: Kenichi Takada