Specifically For Guiding Light In A Front-lit Device Patents (Class 349/63)
  • Patent number: 10393947
    Abstract: A display device includes a display panel, and a backlight unit including a light guide plate which guides light in an upward direction toward the display panel and including a transmission region and a reflection region; a supporting pattern at the reflection region; a reflection layer on upper and side surfaces of the supporting pattern; and an insulating layer which covers the transmission region and the reflection layer at the reflection region.
    Type: Grant
    Filed: August 16, 2017
    Date of Patent: August 27, 2019
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Jungsuk Bang, Hyunyoung Jung, Kwangsoo Bae, Minjeong Oh, Haeju Yun
  • Patent number: 10386547
    Abstract: A textured surface on the inward side of the high refractive index transparent front sheet in a reflective image display may lead to a display with a wider viewing angle. The textured surface may be in a random or a patterned array and may comprise microstructures that exhibit total internal reflection and Fresnel reflections. Electrophoretically mobile particles of similar size to the microstructures may improve coverage on the front sheet and improve frustration of TIR leading to darker dark states.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: August 20, 2019
    Assignee: CLEARink Displays, Inc.
    Inventors: Bram M. Sadlik, Rob Hannebauer, Thomas Johansson, Steven Gou
  • Patent number: 10373544
    Abstract: A three-dimensional (3D) display driver includes a single buffer and a mapping circuit. The single buffer is configured to store a tiled image that includes a contiguously arranged plurality of tiles. Each tile represents a different 3D view of a 3D image. The different 3D views have associated angular ranges and principal angular directions. The mapping circuit is configured to access the stored tiled image and to map pixels from the different 3D views into pixels at corresponding locations in a composite image. The composite image is configured to spatially interleave the pixels from the different 3D views so that pixels from each of the different 3D views are distributed across the composite image. A 3D electronic display includes the mapping circuit.
    Type: Grant
    Filed: July 10, 2018
    Date of Patent: August 6, 2019
    Assignee: LEIA, INC.
    Inventor: David A. Fattal
  • Patent number: 10371887
    Abstract: A display apparatus includes: a display panel displaying an image; a light guide plate facing the display panel. The display panel and the light guide plate are coupled by a coupling member disposed at a peripheral portion of the display apparatus, and an optical sheet being interposed in a void formed between the display panel and the light guide plate. The coupling member includes a leg plate having a strip shape and two side plates protruding inward from both edges in a width direction of the leg plate approximately in parallel to each other. The coupling member is attached in such a way that the leg plate is provided along both a peripheral edge of the display panel and a peripheral edge of the light guide plate, one of the two side plates extending inward is provided along a facing surface of the display panel facing the light guide plate, and the other of the two side plates is provided along at least one surface of the light guide plate.
    Type: Grant
    Filed: September 26, 2014
    Date of Patent: August 6, 2019
    Assignee: Sakai Display Products Corporation
    Inventors: Arimasa Sugimoto, Yasunori Minakuchi
  • Patent number: 10274662
    Abstract: A planar illumination apparatus according to an embodiment includes a light guiding plate, a frame member, and an attenuation part. The light guiding plate includes a light extracting surface; and a light incident side surface on which light emitted from a light source is made incident. The light incident side surface is a side surface intersecting with the light extracting surface. The frame member including side walls are arranged to be along side surfaces other than the light incident side surface of the light guiding plate. The side walls are separated from the side surfaces. The attenuation part is arranged close to at least one of the side surfaces other than the light incident side surface to attenuate light emitted from the at least one side surface.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: April 30, 2019
    Assignee: MINEBEA MITSUMI INC.
    Inventors: Takashi Edamitsu, Mayuko Sugiyama, Mio Anma
  • Patent number: 10254448
    Abstract: A light modulation device includes a dielectric antenna and a refractive-index-variable layer which faces the dielectric antenna and comprises a material having a refractive index that changes according to a signal. A light may be modulated, since resonance characteristics of the dielectric antenna are controlled according to a refractive-index change of the refractive-index-variable layer.
    Type: Grant
    Filed: June 28, 2016
    Date of Patent: April 9, 2019
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Duhyun Lee, Sunil Kim, Changgyun Shin, Jungwoo Kim, Chang bum Lee
  • Patent number: 10247870
    Abstract: A wearable display apparatus includes a reflective light modulator having a front, a light guide plate placed at the front of the light modulator, a plurality of monochromatic light sources of different colors, and an optical assembly. The light guide plate has a first and a second major surface opposite to each other, and a light incidence surface connected with the first and second major surfaces, the light guide plate directing light received at the light incidence surface through the first major surface toward the light modulator. The monochromatic light sources are operable to emit light of different colors in a sequential manner. The optical assembly is arranged adjacent to the light incidence surface of the light guide plate, and is configured to homogenize and distribute the light emitted by each of the monochromatic light sources across the light incidence surface.
    Type: Grant
    Filed: September 11, 2015
    Date of Patent: April 2, 2019
    Assignee: HIMAX DISPLAY, INC.
    Inventors: Kuan-Yu Chen, Yuet Wing Li
  • Patent number: 10215344
    Abstract: A light emitting panel assembly is provided. The assembly includes: a light source; a transition area including a first major side and a second major side, wherein at least one of the first major side and the second major side includes a plurality of vertically extending flutes, wherein the flutes extend at least a portion of the height of the transition area; and an emission area in optical communication with the transition area, the emission area including light extraction elements.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: February 26, 2019
    Assignee: Fluxwerx Illumination Inc.
    Inventors: Scott Santoro, Timothy Edward Berman
  • Patent number: 10185081
    Abstract: A display apparatus includes a display panel having a display surface on one surface thereof, a light guide plate disposed on the other surface side of the display panel, a substrate on which a plurality of light source elements disposed to face an end face of the light guide plate are mounted on one surface thereof, a support plate for supporting the substrate, and a frame body for covering a peripheral edge part of the display panel and the support plate, wherein the frame body and support plate have holes formed at positions thereof facing the end face, and the substrate has an insertion hole into which any one tip part of a screw or a clip fitted into the holes is inserted.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: January 22, 2019
    Assignee: Sakai Display Products Corporation
    Inventor: Ryota Kobayashi
  • Patent number: 10061138
    Abstract: A system for selectively controlling visibility of information in a work environment is provided. The system includes one or more polarized emissive screens located within the work environment. The screens have a first direction of polarization. Information displayed on the screens is visible from inside the work environment. The work environment includes at least one window which permits viewing of the polarized emissive screens from outside of the work environment. A polarizing filter having a second direction of polarization arranged at an angle to the first direction of polarization is positioned proximate to the window. From outside the work environment, the inside of the environment can be seen through the window, but with an altered view of the information on the displays.
    Type: Grant
    Filed: December 19, 2017
    Date of Patent: August 28, 2018
    Assignee: STEELCASE INC.
    Inventors: Matthew Mead, Paul Noll, Lisa Mead, Remi Marcel Louis Casal, Joel Stanfield
  • Patent number: 10061071
    Abstract: In various embodiments, a panel luminaire (300, 400, 500) may include a housing (302, 402) that frames a light aperture (304, 404), a linear substrate (308, 408) mounted to the housing along a first plane, at least one light source (306, 406) mounted along the linear substrate to emit light along the first plane, and a planar light guide (310, 410, 510) mounted to the housing parallel to the first plane. The planar light guide may include a light extraction feature (312) to extract light emitted by the at least one light source. In some embodiments, a portion (334) of a periphery (314) of the planar light guide may be curved to redirect light emitted by the at least one light source towards the light extraction feature. In some embodiments, the planar light guide and an aesthetic panel (418, 518) of the housing may be spaced apart to form a gap (420, 520) big enough to allow for the aesthetic panel to be three dimensional.
    Type: Grant
    Filed: January 18, 2016
    Date of Patent: August 28, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Christo Philip Brand, Adrian John Frederick Weston, Ryan Robert James Gates, Kwong Hung Man
  • Patent number: 10012842
    Abstract: A stereoscopic image display and a method for manufacturing the same are disclosed. The stereoscopic image display includes a display panel, a polarizing plate positioned on a display surface of the display panel, a patterned retarder film positioned on the polarizing plate, and a pattern layer positioned between the display surface of the display panel and the polarizing plate. The pattern layer has a pattern groove provided with an air layer therein. The pattern groove has a wide lower part contacting the display surface of the display panel and a narrow upper part contacting the polarizing plate.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: July 3, 2018
    Assignee: LG Display Co., Ltd.
    Inventors: Donghoon Lee, Sungpil Ryu
  • Patent number: 9927556
    Abstract: In one aspect, structures are provided that comprise (a) a one-dimensional periodic plurality of layers, wherein at least two of the layers have a refractive index differential sufficient to provide effective contrast; and (b) one or more light-emitting nanostructure materials effectively positioned with respect to the refractive index differential interface, wherein the structure provides a polarized output emission.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: March 27, 2018
    Assignees: The Board of Trustees of the University of Illinois, Rohm and Haas Electronic Materials LLC, Dow Global Technologies LLC
    Inventors: Brian Cunningham, Gloria G. See, Peter Trefonas, III, Jieqian Zhang, Jong Keun Park, Kevin Howard, Kishori Deshpande, Trevor Ewers
  • Patent number: 9891472
    Abstract: The disclosure provides a light guide plate, a backlight unit, a display device and a display control system. The light guide plate has a first operation state and a second operation state. In the first operation state, an upper surface of the light guide plate is a surface where light comes out, and in the second operation state, the upper surface of the light guide plate includes a light exiting region and a non-light exiting region. In the technical solution of the present disclosure, when the display device performs a regional displaying, the light guide plate operates in the second operation state, here the upper surface of the light guide plate includes the light exiting region and the non-light exiting region; light emitted by a light source finally comes out from the light exiting region of the light guide plate after reflections inside the light guide plate.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: February 13, 2018
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI XINSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Long Yan, Lin Lin, Jun Zhang, Zhengyuan Zhang, Zhiyu Qian
  • Patent number: 9876058
    Abstract: A highly reliable display device or electronic appliance is provided. The display device or a light-emitting device includes a substrate; a light-emitting element including a first electrode, an EL layer, and a second electrode; an organic resin film in contact with the light-emitting element; and an oxide semiconductor film in contact with the light-emitting element and the organic resin film. The oxide semiconductor film is in contact with the first electrode or the second electrode included in the light-emitting element. The oxide semiconductor film is in contact with an exposed portion of the organic resin film, typically, a side surface of the organic resin film. The light-emitting element and the organic resin film are positioned between the substrate and the oxide semiconductor film.
    Type: Grant
    Filed: May 6, 2015
    Date of Patent: January 23, 2018
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Shunpei Yamazaki, Shingo Eguchi, Toshiyuki Isa, Sayaka Kaga
  • Patent number: 9772442
    Abstract: The present invention provides an optical film assembly mounting structure, which includes: a first mold frame (6), a second mold frame (8) arranged on the first mold frame (6), and an optical film assembly (9) arranged between the first and second mold frame (6, 8). The first mold frame (6) carries the optical film assembly (9) thereon and the second mold frame (8) is positioned on and presses down the optical film assembly (9) so as to achieve secure mounting of the optical film assembly (9). The first mold frame (6) includes an inclined first upper surface (61). The second mold frame (8) includes a first bottom surface (81) and a second bottom surface (83) connected to the first bottom surface and having an inclination angle identical to that of the first upper surface (61). The optical film assembly (9) is positioned on the first upper surface (61) and the first and second bottom surfaces (81, 83) are positioned on and press down the optical film assembly (9).
    Type: Grant
    Filed: May 8, 2014
    Date of Patent: September 26, 2017
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventors: Gege Zhou, GuoFu Tang, Yuchun Hsiao
  • Patent number: 9739925
    Abstract: The present disclosure provides a light-emitting module. The light-emitting module includes a light guide, a plurality of light source and a light-adjusting film. The light-adjusting film has a first light absorption portion, a plurality of second light absorption portions and a plurality of light reflection portions. The second light absorption portions are individually extended from the projection position of the light sources on the first light absorption portion, and may absorb part of the light in front of the light sources; and each of the light reflection portions is between two of the adjacent second light adsorption portions, and may reflect the light shinning thereon.
    Type: Grant
    Filed: November 13, 2014
    Date of Patent: August 22, 2017
    Assignee: E Ink Holdings Inc.
    Inventors: Yao-Tsung Shih, Mei-Chen Chang
  • Patent number: 9733421
    Abstract: A backlight module having a light guide plate, an optical assembly disposed on an upper surface of the light guide plate, and a light shielding tape, the light guide plate includes a light guide plate body and a reinforcement member disposed at a non-incidence side end surface of the light guide plate body, and the light shielding tape is adhered to a portion of an upper surface of the optical assembly and extends to cover the reinforcement member. Further provided is a display device having the same.
    Type: Grant
    Filed: April 13, 2015
    Date of Patent: August 15, 2017
    Assignee: WUHAN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventor: Gege Zhou
  • Patent number: 9719012
    Abstract: A tube lamp has a tubular portion that serves both as a light guide for energy from a solid state source and as a container for a material bearing a nanophosphor that is pumped by the energy from the source as the energy traverses the light guide. However, the tubular portion of the light guide also allows emission of light produced by the phosphor when excited. The material with the nanophosphor dispersed therein may appear either clear or translucent when the lamp is off and the nanophosphor is not excited by energy from the source.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: August 1, 2017
    Assignee: ABL IP HOLDING LLC
    Inventors: Jack C. Rains, Jr., David P. Ramer
  • Patent number: 9709847
    Abstract: A backlight layer to be operatively coupled with an LCD panel, the backlight layer comprising: an illumination source configured to illuminate the LCD panel; a dual-mode infrared filter configured to filter an infrared spectrum of light emanating from the illumination source, wherein: when the dual-mode infrared filter is in an enabled mode, the dual-mode infrared filter is positioned in the path of the light emanating from the illumination source and before the light reaches the LCD panel, thereby filtering an infrared spectrum of the light, and when the dual-mode infrared filter is in a disabled mode, the dual-mode infrared filter is positioned out of the path of light emanating from the illumination source, thereby allowing a complete spectrum of the light to reach the LCD panel.
    Type: Grant
    Filed: December 2, 2014
    Date of Patent: July 18, 2017
    Assignee: ROBO-TEAM DEFENSE LTD.
    Inventors: Yosi Wolf, Mor Rotbart, Mark Vaynberg, Elad Levy, Gregory Heifets
  • Patent number: 9678266
    Abstract: A display module is provided. A light source is configured to provide an illumination beam. A light guide plate has a first surface, a second surface opposite to the first surface, and an incident surface connecting the first surface and the second surface. The illumination beam enters the light guide plate through the incident surface. An optical structure is connected to the light guide plate and configured to change a propagation direction of the illumination beam. A reflective display unit is capable of modulating a polarization state of the illumination beam to form a modulated beam. The second surface is disposed between the reflective display unit and the first surface. The first surface is disposed between the second surface and a reflective polarizer, and the reflective polarizer filters the modulated beam into an image beam.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: June 13, 2017
    Assignee: Himax Display, Inc.
    Inventors: Yuet-Wing Li, Kuan-Hsu Fan-Chiang
  • Patent number: 9645307
    Abstract: The invention discloses a backlight module.
    Type: Grant
    Filed: August 27, 2014
    Date of Patent: May 9, 2017
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventors: Shihhsiang Chen, Dehua Li, Yuchun Hsiao
  • Patent number: 9547112
    Abstract: A system for selectively controlling visibility of information in an environment is provided. The system includes one or more polarized emissive screens and polarized non-emissive surfaces located within the work environment. The screens have a first direction of polarization and the surfaces have a direction of polarization substantially aligned with the first direction of polarization. Information displayed on the screens and surfaces are visible to a person inside the work environment. The work environment includes at least one window which permits viewing of the polarized emissive screens and non-emissive surfaces from outside of the work environment. A polarizing filter having a second direction of polarization arranged at an angle to the first direction of polarization is positioned proximate to the window. A person outside the work environment can see inside the environment through the window, but has an altered view of the information on the displays and surfaces.
    Type: Grant
    Filed: April 27, 2015
    Date of Patent: January 17, 2017
    Assignee: Steelcase Inc.
    Inventors: Matthew Mead, Paul Noll, Lisa Mead, Rémi Marcel Louis Casal, Joel Stanfield
  • Patent number: 9515128
    Abstract: A display device includes: a supporting member including a body, and a supporter rotatably coupled to a side surface of the body; a display substrate on the supporting member, the display substrate including a first region, and a second region at an outer periphery of the first region; an emission layer on the first region and the second region of the display substrate; a polarizer on the emission layer and on the first region of the display substrate; a touch panel on the polarizer; and a window on the touch panel. The supporter is configured to support the second region of the display substrate such that the second region of the substrate is in a bent-state in a non-display region of the device.
    Type: Grant
    Filed: September 16, 2015
    Date of Patent: December 6, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Sung Ku Kang, Sang Wol Lee, Tae Hyeong Jung, Gyeong Ho Jeong
  • Patent number: 9412644
    Abstract: A first wafer is provided that includes an insulating layer, a first active layer, and a handle layer. The insulating layer has a first surface and a second surface. The first active layer contacts the first surface of the insulating layer. The handle layer contacts the second surface of the insulating layer. A second wafer is provided that includes a substrate and a second active layer. The substrate has a first surface and a second surface. The second active layer contacts the first surface of the substrate. The second wafer is bonded to the first wafer by physically connecting the first active layer to the second surface of the substrate. The handle layer is removed. A metal bond pad is formed on the second surface of the insulating layer. The metal bond pad is electrically connected to the first active layer.
    Type: Grant
    Filed: December 16, 2014
    Date of Patent: August 9, 2016
    Assignee: Qualcomm Incorporated
    Inventors: Michael A. Stuber, Stuart B. Molin, Mark Drucker, Peter Fowler
  • Patent number: 9395574
    Abstract: A liquid crystal display includes a first substrate, which includes a first surface and a second surface opposite to the first surface, the first surface of the first substrate including a TFT array and a color filter layer formed thereon, the color filter layer including a plurality of color filter units arranged in an array and gaps formed between adjacent color filter units; and a second substrate, which includes a third surface and a fourth surface opposite to the third surface, the third surface and the first surface facing each other, the third surface including a black matrix layer formed thereon and including a plurality of black matrixes respectively corresponding to the gaps between the plurality of color filter units, the black matrix layer including a layer of a transparent conductive film coated thereon. The material of the black matrix layer is molybdenum.
    Type: Grant
    Filed: August 7, 2014
    Date of Patent: July 19, 2016
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Liang Xu
  • Patent number: 9383485
    Abstract: A backlight module employing a diffusion plate is provided. The diffusion plate includes a main body and antireflection films formed on surfaces of the main body. The main body includes a light incident surface, and a light emitting surface opposite to the light incident surface. Each antireflection film has a number of antireflection film layers. A thickness of each antireflection film layer is less than a wavelength of visible light.
    Type: Grant
    Filed: June 17, 2014
    Date of Patent: July 5, 2016
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Chen-Han Lin
  • Patent number: 9360696
    Abstract: An electronic device includes a stack assembly and a cover glass. The stack assembly includes an electronic paper display sub-assembly for rendering content, a front light sub-assembly for illuminating the electronic display sub-assembly, and a capacitive touch sensing sub-assembly for detecting touch inputs. The cover glass includes two apertures for the placement of control buttons for the electronic device. Prior to assembly of the electronic device, the cover glass is strengthened after the two apertures are formed so as to strengthen the interior edges of the apertures.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: June 7, 2016
    Assignee: Amazon Technologies, Inc.
    Inventors: Hany Mounir Ghali, Gregory Turner Witmer, Chin Siong Khor, Anoop Menon, Premal Vinodchandra Parekh, Robert L. D. Zenner, Lakshman Rathnam, Siddharth Gupta, Angeles Marcia Almanza-Workman
  • Patent number: 9329327
    Abstract: A display includes a reflective display module, a light guide plate, at least one light source and a cover lens. The light guide plate includes a first light guide surface opposite to the reflective display module. The first light guide surface includes a light outgoing region and a peripheral region surrounding the light outgoing region. The light source is used for emitting a light to the light guide plate. The peripheral region of the first light guide surface is connected to the cover lens. The light outgoing region and the cover lens are spatially separated, and define an air gap therebetween.
    Type: Grant
    Filed: December 10, 2013
    Date of Patent: May 3, 2016
    Assignee: E Ink Holdings Inc.
    Inventors: Yu-Nan Pao, I-Jeng Chen, Hsin-Tao Huang, Chin-Ju Hsu, Yu-Nan Tsao, Sheng-Chieh Tai
  • Patent number: 9310634
    Abstract: A display apparatus includes a display layer for generating images to be viewable from a viewing region and an aesthetic layer disposed over the display layer. Activation circuitry is coupled to activate the aesthetic layer in response to an input. When the aesthetic layer is activated, it emits or reflects aesthetic light.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: April 12, 2016
    Assignee: Google Inc.
    Inventor: Mary Lou Jepsen
  • Patent number: 9279920
    Abstract: Provided is a reel unit for a gaming machine which suppresses decrease in visibility of a reel belt due to the formation of image of light source on a reel even if light emission intensity for illuminating the reel is high. It is provided a first light diffusion sheet with translucency having a light refraction surface including a surface formed thereon for refracting light passing therethrough in various directions, the first light diffusion sheet stacked on a base sheet; and a second light diffusion sheet having the light refraction surface, the second light diffusion sheet stacked on the first light diffusion sheet.
    Type: Grant
    Filed: April 22, 2014
    Date of Patent: March 8, 2016
    Assignees: UNIVERSAL ENTERTAINMENT CORPORATION, ARUZE GAMING AMERICA, INC.
    Inventors: Motomichi Sato, Tatsuya Teranishi, Kenta Kitamura, Jun Hirato, Takuto Nakayama
  • Patent number: 9151984
    Abstract: In embodiments of active reflective surfaces, an imaging structure includes a circuit control layer that controls pixel activation to emit light. A reflective layer of the imaging structure reflects input light from an illumination source. An active color conversion material that is formed on the reflective layer converts the input light to the emitted light. The active color conversion material can be implemented as a phosphorus material or quantum dot material that converts the input light to the emitted light, and in embodiments, the active color conversion material is laminated directly on the reflective layer.
    Type: Grant
    Filed: June 18, 2012
    Date of Patent: October 6, 2015
    Assignee: Microsoft Technology Licensing, LLC
    Inventors: Rod G. Fleck, Andreas G. Nowatzyk, David D. Bohn
  • Patent number: 9091846
    Abstract: A display device includes a display panel having a display surface, a light guiding unit disposed at a display surface side of the display panel, the light guiding unit having an incident part and an irradiation part, the incident part being parallel to the display surface and facing the display surface, the irradiation part being parallel to the display surface and configured to emit a light entered from the incident part, the irradiation part having a plurality of irradiation surfaces whose positions in a direction orthogonal to the incident part differ depending on a position on the display surface, and a mirror configured to reflect an image projected from the display panel through the light guiding unit.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: July 28, 2015
    Assignee: JAPAN DISPLAY INC.
    Inventor: Toshinori Uehara
  • Patent number: 9088126
    Abstract: In one aspect, semiconductor lasers are provided. A semiconductor laser described herein comprises substrate and a cavity formed on the substrate, the cavity comprising an asymmetric Mach-Zehnder (AMZ) interferometer structure positioned between two straight waveguide segments, the straight waveguide segments and first and second arms of the AMZ interferometer structure comprising epitaxial semiconductor layers, wherein the second arm of the AMZ interferometer structure has a temperature control architecture independent of the first arm.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: July 21, 2015
    Assignee: THE TRUSTEES OF PRINCETON UNIVERSITY
    Inventors: Mei Chai Zheng, Qiang Liu, Claire F. Gmachl
  • Patent number: 9086595
    Abstract: An area light source device has a light guide plate having an end face and a light exit surface, a light source that is disposed in a position facing the end face of the light guide plate, a plurality of optical sheets that are disposed on the light guide plate, a light shielding plate that is disposed so as to cover an upper portion of the light source, and a light blocking member that is provided between the end face of the light guide plate and the light exit surface. The end face of the light guide plate is configured to have light introduced therethrough. The light exit surface of the light guide plate is configured to output the light from the light guide plate. The light blocking member is different from the light shielding plate.
    Type: Grant
    Filed: February 8, 2013
    Date of Patent: July 21, 2015
    Assignee: OMRON Corporation
    Inventors: Koichi Takemura, Takashi Sato, Masanori Mori, Akira Nagao, Tetsuo Hayashi, Kazuhide Hirota, Gouo Kurata
  • Patent number: 9077345
    Abstract: A capacitive sensing apparatus is described that incorporates a light guide having a light scattering means for illumination of the apparatus. The apparatus has a capacitive sensor mounted on a substrate that provides a capacitive sensing area for generating an electric field that emanates from the apparatus. A light source is arranged in optical communication with the light scattering means via the light guide. This arrangement acts to mitigate the effects of interference between the capacitive sensor and the light source. When an opaque substrate is employed an air gap is located between the substrate and the light guide so as to provide a substantially uniform illumination across the light guide. Appropriate selection of the refractive indices of the light guide, ng, and a transparent substrate, ns, provides the same desired uniform illumination in alternative embodiments. The capacitive sensing apparatus finds particular application within a touch sensitive display.
    Type: Grant
    Filed: May 8, 2009
    Date of Patent: July 7, 2015
    Assignee: DESIGN LED PRODUCTS LIMITED
    Inventor: James Gourlay
  • Patent number: 9030627
    Abstract: Devices such as electronic book readers, tablet computers, laptops, and so forth may use reflective liquid crystal display (“LCD”) technologies. Described herein are devices and methods for illuminating the reflective LCD with a light guide panel. The light guide panel is configured with diffractive or other optical features configured to distribute light to the reflective LCD. A directive reflector may be arranged behind the reflective LCD to improve overall reflectivity by directing impinging light such that optical obstructions such as transistors and electrical traces within the reflective LCD are avoided.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: May 12, 2015
    Assignee: Amazon Technologies, Inc.
    Inventor: Leo B. Baldwin
  • Patent number: 9028123
    Abstract: A reflective display includes a reflective spatial light modulator and a frontlight. The frontlight includes a lightguide formed from a film. The lightguide includes an array of coupling lightguides continuous with a lightguide region of the lightguide. One or more light sources emit light into the array of coupling lightguides. Light from each coupling lightguide combines and totally internally reflects within the lightguide region. Light extraction features frustrate totally internally reflect light within the lightguide region such that the light exits the lightguide toward the reflective spatial light modulator in a light emitting region of the film. A cladding region is optically coupled to the lightguide so light from the light source propagates into the cladding region. A light extracting region is operatively coupled to the cladding region opposite the lightguide, and light in the cladding region is extracted. A method of producing a display is also disclosed.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: May 12, 2015
    Assignee: FLEx Lighting II, LLC
    Inventors: Anthony John Nichol, Zane Arthur Coleman
  • Patent number: 9024917
    Abstract: A light guide for illuminating a display screen, including a vertical cone-shaped entrance surface including an aperture for admitting light beams emitted by an LED, a folding mirror for reflecting the admitted light beams at an angle of approximately 90°, and for horizontally collimating the admitted light beams, a horizontal guide for guiding the reflected light beams to an exit surface, and an exit surface positioned above a perimeter of a display screen for directing the guided light towards a portion of the display screen, the exit surface being tilted vertically from the horizontal at a slight angle to direct the guided light beams towards the display, and being shaped horizontally as a concave lens to spread the guided light beams horizontally over an angular expanse of the display screen.
    Type: Grant
    Filed: March 9, 2013
    Date of Patent: May 5, 2015
    Assignee: Neonode Inc.
    Inventors: Thomas Eriksson, Lars Sparf, Björn Magnus Jacobsson Le Normand
  • Patent number: 8979342
    Abstract: A system for illuminating a reflective display or other material from a planar front device and a method of manufacture thereof. The system includes a light guide plate that conducts light from an edge light source across the face of a reflective display. Micro scattering features are formed on an outer surface of the light guide, farthest from the reflective display or material. A stepped index layer is formed on the surface of light guide plate containing the micro scattering features. The stepped index layer has an index of refraction lower than an index of refraction of the light guide plate to assist in the total internal reflection of light injected into the light guide plate. The micro scattering features, light reflecting areas, redirect luminous flux toward the display. In one embodiment, the micro scattering features are formed as white dots on the light guide plate.
    Type: Grant
    Filed: August 17, 2012
    Date of Patent: March 17, 2015
    Assignee: barnesandnoble.com llc
    Inventors: Charles Neugebauer, William Saperstein
  • Patent number: 8976311
    Abstract: A backlight unit adapted to implement enhanced light efficiency and uniform brightness is disclosed. The backlight unit includes a plurality of light sources arranged at fixed intervals, a diffusion plate disposed on the plurality of light sources, prism patterns formed on one surface of the diffusion plate, and micro-lens patterns formed on the other surface of the diffusion plate. The vertex angle of each prism pattern is in a range of about 64°˜76°.
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: March 10, 2015
    Assignee: LG Display Co. Ltd.
    Inventors: Min Joo Kim, Dong Hyeok Kim, Jin Ryun Kim
  • Patent number: 8976319
    Abstract: Provided is a display device that includes: a display panel (7) that has a display surface that displays an image; a fan (500); an ion-generating device (520) that can generate ions; and a guiding mechanism (620) that can selectively guiding air from the fan (500) to the display surface and to the rear side of the display surface. The air that is guided to the display surface is guided together with ions that are generated by the ion-generating device (520).
    Type: Grant
    Filed: November 9, 2011
    Date of Patent: March 10, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yukihide Kohtoku
  • Patent number: 8964146
    Abstract: Optical constructions are disclosed. A disclosed optical construction includes first and second optical layers having first and second major surfaces that face each other and are separated by an air gap. The first and second surfaces are susceptible to physically contacting each other at a location in the air gap. The optical construction further includes an optical film that is disposed at the location to prevent the first and second major surfaces from contacting each other at the location. The optical film has an effective index of refraction that is not greater than about 1.3.
    Type: Grant
    Filed: April 14, 2010
    Date of Patent: February 24, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Encai Hao, William Blake Kolb, John A. Wheatley, Fei Lu, Adam D. Haag
  • Patent number: 8952935
    Abstract: A touch display, including: a light source; a light guide plate, having a first refractive index and having a side face close to the light source; a cover layer, having a second refractive index and being placed over the light guide plate, and the second refractive index is smaller than the first refractive index; a plurality of pillar structures, having a third refractive index and being placed under the light guide plate, and the third refractive index is larger than or equal to the first refractive index; a touch structure, placed over the cover layer; and an electronic paper device, placed under the pillar structures.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: February 10, 2015
    Assignee: E Ink Holdings Inc.
    Inventors: Hsin-Tao Huang, Chuang-Chuang Tsai
  • Patent number: 8953118
    Abstract: A liquid crystal display apparatus according to an embodiment of the invention includes: a liquid crystal cell; polarizing plates placed on both sides of the liquid crystal cell; a light diffusing element provided outside of the polarizing plate on a viewer side; and a backlight unit provided outside of the polarizing plate on an opposite side of the viewer side. The backlight unit includes a collimated light source device that emits collimated light having a brightness half-value angle of 3° to 35° toward the liquid crystal cell, and a ratio Fw(BL)/Fw(FD) between a diffused light half-value angle Fw(FD) of the light diffusing element and the brightness half-value angle Fw(BL) of the collimated light is 0.5 or less.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: February 10, 2015
    Assignee: Nitto Denko Corporation
    Inventors: Akinori Nishimura, Hiroyuki Takemoto, Takehito Fuchida, Minoru Miyatake, Shunsuke Shutou
  • Patent number: 8919997
    Abstract: A white light emitting diode includes a blue light emitting diode (“LED”) light source, and a light conversion layer which converts incident light from the blue LED light source into white light. The light conversion layer includes a green light emitting semiconductor nanocrystal and a red light emitting semiconductor nanocrystal. The white light emitting diode has a red, green and blue color (“RGB”) color locus which is within a chrominance error range (±4?E*ab±2?E*ab) locus from the constant hue locus of each of sRGB color coordinates, or within a chrominance error range (±4?E*ab±2?E*ab) locus from the constant hue locus of each of AdobeRGB color coordinates.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: December 30, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seoung-Jae Im, Seo-Young Choi, Eun-Joo Jang
  • Patent number: 8919998
    Abstract: A white light emitting diode includes a blue light emitting diode (“LED”) light source, and a light conversion layer which converts incident light from the blue LED light source into white light. The light conversion layer includes a green light emitting semiconductor nanocrystal and a red light emitting semiconductor nanocrystal. The white light emitting diode has a red, green and blue color (“RGB”) color locus which is within a chrominance error range (±4?E*ab±2?E*ab) locus from the constant hue locus of each of sRGB color coordinates, or within a chrominance error range (±4?E*ab±2?E*ab) locus from the constant hue locus of each of AdobeRGB color coordinates.
    Type: Grant
    Filed: April 17, 2014
    Date of Patent: December 30, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seoung-Jae Im, Seo-Young Choi, Eun-Joo Jang
  • Patent number: 8908124
    Abstract: A light guide plate for a backlight unit of a liquid crystal display device includes one side surface where light from a first light source is incident; the other side surface opposite to the one side surface; a front surface combining the one and the other one side surfaces; and a rear surface including a plurality of light guide patterns, each of the plurality of light guide patterns including a protruding portion and a groove portion, wherein one of the protruding portion and the groove portion is positioned at a center of the other one of the protruding portion and the groove portion.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: December 9, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Sang-Hyun Lee, Byoung-Ku Kim, Won Taek Moon, Young-Ik Hwang
  • Patent number: 8902379
    Abstract: Disclosed are a display device and a method for manufacturing an optical member. The display device includes a light source; a plurality of wavelength conversion particles to convert a wavelength of a light generated from the light source; and a tube to receive the wavelength conversion particles, wherein a scattering pattern is formed on at least one surface of the tube.
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: December 2, 2014
    Assignee: LG Innotek Co., Ltd.
    Inventor: Seung Ryong Park
  • Patent number: 8885120
    Abstract: A color Liquid Crystal display (LCD) device for displaying a color image using at least four different primary colors, the device including an array of Liquid Crystal (LC) elements, driving circuitry adapted to receive an input corresponding to the color image and to selectively activate the LC elements of the LC array to produce an attenuation pattern corresponding to a gray-level representation of the color image, and an array of color sub-pixel filter elements juxtaposed and in registry with the array of LC elements such that each color sub-pixel filter element is in registry with one of the LC elements, wherein the array of color sub-pixel filter elements comprises at least four types of color sub-pixel filter elements, which transmit light of the at least four primary colors, respectively.
    Type: Grant
    Filed: April 15, 2008
    Date of Patent: November 11, 2014
    Assignee: Genoa Color Technologies Ltd.
    Inventors: Ilan Ben-David, Shmuel Roth, Moshe Ben-Chorin