Specifically For Guiding Light In A Front-lit Device Patents (Class 349/63)
  • Publication number: 20110249219
    Abstract: A display device includes a first layer having an optically active display portion, a second layer including a photovoltaic element, and a third layer including electronics operatively coupled to the first layer, wherein the electronics are configured to drive the optically active display portion. Further, the second layer is arranged between the first and third layers.
    Type: Application
    Filed: April 13, 2010
    Publication date: October 13, 2011
    Inventors: Allan EVANS, Stephen Day, Sunay Shah, Patrick Zebedee, Lesley Parry-Jones, Gareth Nicholas
  • Publication number: 20110242456
    Abstract: According to one embodiment, a display device includes a display unit and a drive circuit. The display unit includes a first display region to display a first image and a second display region to display a second image. The display unit includes a first support substrate, a second support substrate, and a liquid crystal layer. The second support substrate is disposed to oppose the first support substrate. The liquid crystal layer is interposed between the first support substrate and the second support substrate and is held by the first support substrate and the second support substrate. The drive circuit drives the display unit.
    Type: Application
    Filed: September 9, 2010
    Publication date: October 6, 2011
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tsuyoshi Hioki, Rieko Fukushima, Takeshi Morino
  • Publication number: 20110242457
    Abstract: A composite color separation system, comprises: a light control module, a light guide module and a light splitting module. The light control module has a lighting unit and a lens unit, in which the lighting unit includes an array of lighting elements whereas there are at least two types of lighting elements in the array for emitting at least two beams of different wavelengths. The light from the lighting unit is directed to enter the lens unit before being discharged out of the light control module. The light guide module comprises: a first light incident surface, for receiving the beams from the light control module; a first light emergence surface; and a light guide structure, for guiding the beams to the first light emergence surface where they are discharged out of the light guide module to the light splitting module. The light splitting module is used for splitting the beams.
    Type: Application
    Filed: October 27, 2010
    Publication date: October 6, 2011
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Chi-Hung Lee, Hui-Hsiung Lin, Po-Chou Chen, Cheng-Huan Chen
  • Patent number: 8022615
    Abstract: A self emission device (644) that emits light (526). The self emission device can include at least one light emission layer (104) encompassing an area, and generating light over such area in a distributed fashion. The self emission device also can include a first electrode (113) interfacing with a first side (116) of the light emission layer and a second electrode (114) interfacing with a second side (117) of the light emission layer. The first electrode and the second electrode can provide energy used by the light emission layer to illuminate. The self emission device can be a component of a display (100) comprising a reflective display panel (102).
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: September 20, 2011
    Assignee: Motorola Mobility, Inc.
    Inventors: XiaoPing Bai, Sen Yang, Wenyong Zhu
  • Patent number: 7986388
    Abstract: An object of the present invention is to provide a substrate film for optical sheets, an optical sheet and a backlight unit which can markedly enhance utilization efficiency of rays of light and dramatically increase luminance and which are suited for immediate beneath type liquid crystal display modules and the like. The present invention is characterized by a substrate film for optical sheets formed into a rectangular shape and made of a resin, in which the substrate film for optical sheets has an optical anisotropy, and the absolute value of an angle of the crystal orientation with respect to the short side orientation is ?/8 or greater and 3?/8 or less. The retardation value of the substrate film is preferably 70 nm or greater and 320 nm or less. Matrix resin constituting the substrate film is preferably polyethylene terephthalate or polycarbonate.
    Type: Grant
    Filed: May 7, 2007
    Date of Patent: July 26, 2011
    Assignee: Keiwa Inc.
    Inventor: Kenichi Harada
  • Publication number: 20110176087
    Abstract: Disclosed are a backlight unit and a display device using the same. The backlight unit includes a light guide plate, a light emitting module provided on at least one lateral surface of the light guide plate to supply light to the light guide plate, and a bottom cover to contain the light guide plate and the light emitting module. The light emitting module includes a substrate including a plurality of through holes and a plurality of light emitting devices which are inserted into the through holes and spaced apart from the light guide plate at a first distance.
    Type: Application
    Filed: January 7, 2011
    Publication date: July 21, 2011
    Inventor: Dong Wook PARK
  • Patent number: 7982821
    Abstract: A display device of the present invention includes: an illumination device that emits light; first and second substrates provided opposite each other; and the first substrate being disposed closer to the backlight device than the second substrate is; and a plurality of microlenses (2) provided on the surface, opposite the backlight device, of the first substrate, the plurality of microlenses converging light (7) emitted from the illumination device, the first substrate having a plurality of pixels (Px) disposed in a matrix, each of the pixels including: a transparent region (Tr) through which light passes; and a reflective region (Rf) from which light is reflected, wherein the light (7) emitted from the illumination device is converged onto the transparent region (Tr) through the microlens (2), wherein an uneven section (19) with convexities and concavities is provided between the neighboring microlenses (2) on the surface of the first substrate which surface is opposite the illumination device (3).
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: July 19, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hisashi Watanabe
  • Patent number: 7978285
    Abstract: A surface light source includes a light source which selectively irradiates two polarized light beams in polarized states different from each other, a light guide plate which includes a transparent plate having two plate surfaces facing each other and end faces surrounding the plate surfaces, and irradiates the two polarized light beams form an irradiation surface, and an optical element which irradiates irradiated light from the irradiation surface of the light guide plate toward a direction substantially normal to the light guide plate upon changing the propagation direction of the irradiated light. A liquid crystal display apparatus includes this surface light source, a polarization control element which is placed on the observation side of the surface light source and rotates the polarization plane of linearly polarized light transmitted through one of partitioned first and second areas through a predetermined angle, and a liquid crystal display device placed on the observation side.
    Type: Grant
    Filed: March 19, 2008
    Date of Patent: July 12, 2011
    Assignee: Casio Computer Co., Ltd.
    Inventor: Yasuhiro Daiku
  • Patent number: 7969405
    Abstract: There is disclosed a double-sided liquid crystal display (LCD) panel which includes a first polymer dispersed liquid crystal (PDLC) layer configured to be responsive to an applied DC voltage for making the first PDLC layer substantially transparent; a center liquid crystal cell layer; a second PDLC layer configured to be responsive to an applied DC voltage for making the second PDLC layer substantially transparent; and an LCD control module configured to control the first and second PDLC layers such that the center liquid crystal cell layer is viewable from a selected viewing side. Depending on the selected viewing side, the LCD control module is configured to select one of the first and second PDLC layers to make substantially transparent, and the other of the first and second PDLC layers to make substantially translucent. A light source may be applied to a side of a translucent one of the PDLC layers to provide a backlight for the center liquid crystal layer.
    Type: Grant
    Filed: July 20, 2007
    Date of Patent: June 28, 2011
    Assignee: International Business Machines Corporation
    Inventor: Derek Kwan
  • Patent number: 7950816
    Abstract: It is an object to manufacture a highly reliable backlight device with less color unevenness and less luminance unevenness, and a high-performance and highly reliable display device including the backlight device, which can display a high quality image. A light emitting diode (LED) is used as a light source of a backlight device and thermoelectric elements are provided in a chassis for holding the light emitting diode so as to surround the light emitting diode (the thermoelectric elements are provided under the light emitting diode and on the four sides thereof). A temperature in the backlight device is adjusted by cooling and heating by the thermoelectric elements.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: May 31, 2011
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Koji Moriya, Takeshi Nishi
  • Patent number: 7944524
    Abstract: The present invention is directed to the provision of a high-contrast display apparatus. The display apparatus of the present invention includes a light source, a display section having an electro-optical conversion device for transmitting or scattering light introduced from the light source, light control means for reflecting the light introduced from the light source at a prescribed reflection angle, and a light reflecting member for causing the light reflected by the light control means and transmitted through the electro-optical conversion device to be reflected outside the field of view of a viewer who is viewing the display section straight on.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: May 17, 2011
    Assignee: Citizen Holdings Co., Ltd.
    Inventors: Takashi Akiyama, Sachiko Kawada
  • Patent number: 7924368
    Abstract: An optical assembly includes a light diffusing layer attached to a reflective polarizing layer. An intermediate region between the light diffusing layer and the reflective polarizing layer includes an intermediate structure that defines voids between the light diffusing layer and the reflective polarizing layer.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: April 12, 2011
    Assignee: 3M Innovative Properties Company
    Inventors: Ryan T. Fabick, Stephen J. Etzkorn, Mark D. Gehlsen
  • Publication number: 20110069255
    Abstract: A backlight unit that is easy to slim and simplify the configuration is disclosed. The backlight unit includes: a lower case with an opened upper surface; at least one light source unit disposed at an inner side surface of the lower case; and a modularized optical unit disposed parallel to the light source unit and configured to include a light guide plate and optical sheets which are accommodated into a reflection sheet.
    Type: Application
    Filed: September 21, 2010
    Publication date: March 24, 2011
    Inventors: Sang Joon CHOI, Young Min Kweon, Sang Ryeon Park, Jae Yong Ryu, Sung Sik Son
  • Patent number: 7894012
    Abstract: A backlight device includes projections disposed on the back side of a light guide plate, and engagement holes engaging with the projections formed in a housing. The projections of the light guide plate are engaged with the engagement holes in the housing to prevent displacement of the light guide plate caused by vibration and impact. One surface of each projection is flush with a light incident surface, the area of that cross-section of each projection which is parallel or substantially parallel to the light incident surface is set such that it continuously decreases as the section is farther away from the light incident surface, and as a result, occurrence of a bright line and a dark line is prevented.
    Type: Grant
    Filed: August 25, 2006
    Date of Patent: February 22, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yuhji Takahashi
  • Publication number: 20110037924
    Abstract: A display apparatus includes at least three layers respectively including members that transmit light when voltages are applied to the members and disperse the light when the voltages are not applied to the members; light-emitting units that respectively emit light beams of different colors from side surfaces of the at least three layers; transparent layers sealed in spaces among the at least three layers, the transparent layers having a refractive index such that the light beams respectively emitted on the at least three layers from the light-emitting units are totally internally reflected by the at least three layers; and a display control unit that individually switches on and off the voltages to be applied to the at least three layers.
    Type: Application
    Filed: April 29, 2010
    Publication date: February 17, 2011
    Applicant: SONY ERICSSON MOBILE COMMUNICATIONS AB
    Inventor: Nobuhiko KIDO
  • Patent number: 7887208
    Abstract: A direct type back-light device comprising: a reflection plate; a plurality of linear light sources disposed in parallel; and a light diffusion plate disposed, in this order, in which the light diffusion plate includes on at least one main surface a plurality of concave or convex structural units each having three or more sloped sides, has a maximum height Rz of the main surface having the structural units being not more than 1000 ?m, and in a vertical cross section of the light diffusion plate, which lies immediately above a region between central axes of adjacent linear light sources and in which a direction perpendicular to a central axis direction of the linear light source is defined as a cutting-plane line, includes a portion: in which the number of lines representing the sloped sides n of which gradients Xn (unit:degree, where n is a natural number and is a subindex for representing each sloped side) differ is 2 or more, and in which all gradients Xn have, between an average distance aL(mm) between the
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: February 15, 2011
    Assignee: Zeon Corporation
    Inventor: Keisuke Tsukada
  • Patent number: 7880826
    Abstract: Disclosed is a light guide plate, comprising a light guide plate body and a plurality of micro mirrors formed on an upper surface of the light guide plate body for controlling a reflection direction of light incident on the light guide plate. The amount of light output from a backlight module using the light guide plate can be controlled by adjusting an angle of each of the micro mirrors with respect to an incident light from a light source.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: February 1, 2011
    Assignee: Beijing Boe Optoelectronics Technology Co., Ltd.
    Inventors: Jian Guo, Kiyong Kim, Weifeng Zhou, Xing Ming
  • Patent number: 7876397
    Abstract: A backlight (5) for a 3D display device, the backlight (5) comprising a planar light guide (7) through which light is guided transversely by internal reflection. The light guide (7) is provided with a plurality of grooves (8), which are configured to direct light propagating within the light guide (7), out of a face (7f) of the light guide (7) so as to form a plurality of line light sources.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: January 25, 2011
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Marcellinus P. C. M. Krijn, Willem L. Ijzerman, Siebe T. De Zwart, Hugo J. Cornelissen
  • Patent number: 7872705
    Abstract: A LCD system including multiple light sources optically coupled through different light entry regions to at least one waveguide element positioned to backlight a LCD panel. A LCD system including multiple light sources coupled to light entry regions of two or more waveguides comprising a waveguide system positioned to backlight a LCD panel. Waveguides of various configurations and promoting even lighting of associated LCD panels are provided. Resulting LCD systems enable uniformly lit panels having diagonal measurements in excess of 12 to 14 inches, but the invention is not limited to panels of any particular size.
    Type: Grant
    Filed: July 29, 2007
    Date of Patent: January 18, 2011
    Assignee: Cree, Inc.
    Inventors: Nicholas W. Medendorp, Jr., Norbert Hiller, Russell G. Villard
  • Publication number: 20110007241
    Abstract: A polarized light emitting light guide plate includes: a transparent substrate of optically isotropic material, in which the light incident through a lateral side thereof travels; an anisotropic liquid crystal polymer layer formed on an upper surface of the substrate and having first and second refractive indices with respect to first and second perpendicular polarization components; and a polarization separation microstructure formed at an interface between the transparent substrate and the liquid crystal polymer layer, which refracts or reflects the first polarization component and transmits the second polarization component. The refractive index of the polarization separation microstructure is substantially equal to the refractive index of the substrate; the first refractive index of the liquid crystal polymer layer is greater than the refractive index of the substrate, and the second refractive index of the liquid crystal polymer layer light is substantially equal to the refractive index of the substrate.
    Type: Application
    Filed: September 10, 2010
    Publication date: January 13, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Seong-mo HWANG, Dong-ho WEE, Seung-ho NAM
  • Patent number: 7862179
    Abstract: A dual-mode projection apparatus has a projection module for projecting an image onto a projection surface. An image sensor module captures images of the projection surface and determines spatial and temporal characteristics of a visible light spot superimposed on the projection surface. A communications module transmits the spatial and temporal characteristics of the visible light spot to a remote device for remote control of the device based on the spatial and temporal characteristics of the visible light spot.
    Type: Grant
    Filed: November 7, 2007
    Date of Patent: January 4, 2011
    Assignee: OmniVision Technologies, Inc.
    Inventors: Jizhang Shan, Jin Li
  • Patent number: 7864258
    Abstract: A liquid crystal panel assembly includes a liquid crystal panel, a backlight module having at least one light emitting diode (LED) light source to irradiate light to the liquid crystal panel, and a housing which surrounds the liquid crystal panel and the backlight module. At least a portion of the housing adjacent to the at least one LED light source is formed of a thermal-conductive material.
    Type: Grant
    Filed: January 11, 2007
    Date of Patent: January 4, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-hyun Cho, Joon Kang
  • Patent number: 7855765
    Abstract: In a backlight which arranges light emitting diodes on a side surface of a light guide plate, even when the light emitting diodes having a thickness larger than a thickness of the light guide plate are used, it is possible to manufacture the light guide plate with high accuracy by injection molding. In a liquid crystal display device having a backlight which radiates light to a liquid crystal panel, LEDs are mounted on the light guide plate formed on the backlight as a light emitting element, and an S-shaped inclined portion whose thickness is not changed is formed on the light guide plate from a light incident surface to a light emitting surface of the light guide plate. Since the thickness of the inclined portion is not changed, it is possible to make the pressure of resin flow at the time of performing injection molding uniform thus manufacturing the light guide plate with high accuracy.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: December 21, 2010
    Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.
    Inventors: Yoshiaki Takahashi, Masayuki Mifune, Ken Kagabu, Hidehiro Hanada, Nobuyuki Suzuki
  • Patent number: 7855763
    Abstract: A backlight device includes: a first prism sheet which has a triangular prism row on a major surface thereof; a first light source which emits light having directivity in a slanted direction with respect to a normal line direction of a light outgoing surface of the first prism sheet in opposite side to the triangular prism row side so as to enter into the triangular prism row of the first prism sheet; and a second light source which emits light having directivity in the normal line direction of the light outgoing surface of the first prism sheet so as to enter into the triangular prism row of the first prism sheet.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: December 21, 2010
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akimasa Yuuki, Kyoichiro Oda, Naoko Iwasaki, Shin Tahata, Toru Kokogawa
  • Patent number: 7852429
    Abstract: A display device includes a display panel, a flexible printed circuit, and a holder that holds the display panel and the flexible printed circuit. The flexible printed circuit connects to a top surface of the display panel and is bent in the vicinity of a side surface of the display panel, and a part of the flexible printed circuit is disposed between a back of the display panel and the holder, the holder having an opening or a depression in a vicinity of the side surface of the display panel. The flexible printed circuit deflects so that a portion of the part of the flexible printed circuit board projects into a space in the opening or the depression of the holder, as viewed in section.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: December 14, 2010
    Assignee: Hitachi Displays, Ltd.
    Inventors: Yasuaki Kondo, Tsutomu Sato, Kosuke Matsubara, Toshimitsu Matsudo
  • Patent number: 7852423
    Abstract: A liquid crystal display device includes a main support supporting a liquid crystal panel and a back light unit, a printed circuit board attached to the liquid crystal panel to provide driving signals to the liquid crystal panel, a separation part between the printed circuit board and the main support creating a gap therebetween, and a holder holding the printed circuit board and the main support together.
    Type: Grant
    Filed: December 28, 2004
    Date of Patent: December 14, 2010
    Assignee: LG Display Co., Ltd.
    Inventor: Won Yong Park
  • Patent number: 7847880
    Abstract: A light guiding plate, a backlight assembly having the light guiding plate and a display device having the backlight assembly include a light guiding plate body, a polarization transformation layer on a surface of the light guiding plate body to transform a polarization component of light emitted through the light guiding plate, and a polarization extraction layer on the polarization transformation layer.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: December 7, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joong-Hyun Kim, In-Sun Hwang
  • Patent number: 7847883
    Abstract: The invention is directed to the higher contrast in a liquid crystal display device (LCD) having a lighting portion as a front light. A lighting portion is formed by interposing an organic EL layer between a transparent substrate and a transparent substrate. A light shield layer is formed covering a cathode layer of the organic EL element layer. The lighting portion is disposed above the reflective LCD. The reflective LCD has a polarizing plate, a light scattering layer, an opposing substrate, a common electrode, a liquid crystal layer, and a TFT substrate. When the refractive indexes of seven layers of an anode layer, the transparent substrate, a resin layer, the polarizing plate, the light scattering layer, the opposing substrate, and the common electrode are defined as n(1), n(2), n(3), n(4), n(5), n(6), and n(7) respectively, the relation of 1.33>n(k)/n(k+1)>0.75(k=1?6) holds.
    Type: Grant
    Filed: May 19, 2006
    Date of Patent: December 7, 2010
    Assignee: Epson Imaging Devices Corporation
    Inventor: Norio Koma
  • Patent number: 7841749
    Abstract: A backlight assembly includes a light source and an optical member disposed over the light source and including a surface that has a plurality of lens-shaped portions and at least one prism-shaped portion.
    Type: Grant
    Filed: April 21, 2006
    Date of Patent: November 30, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jin-Soo Kim, Jung-Wook Paek, Byung-Yun Joo, Ju-Hwa Ha, Jin-Sung Choi
  • Patent number: 7843527
    Abstract: A display device includes a lower substrate, comprising reflective display pixel electrodes, an upper substrate and a liquid crystal layer provided between the substrates. A light source is provided on the upper substrate for illuminating the display electrodes through the liquid crystal layer. This arrangement provides a top light as an integrated structure within the liquid crystal display structure. The illumination can be efficiently provided to the pixel electrodes. This means that a light source pattern used can provide small light source areas.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: November 30, 2010
    Assignee: TPO Displays Corp.
    Inventors: Nigel David Young, Steve Battersby
  • Publication number: 20100283941
    Abstract: A vertically aligned type liquid crystal display panel with wide viewing angles and high display quality can be provided with high production efficiency. A liquid crystal display panel of the present invention includes: a liquid crystal layer of a vertically aligned type; a light-incident side substrate and a light-outgoing side substrate which oppose each other via the liquid crystal layer; a microlens array provided on a light-outgoing side of the light-outgoing side substrate, which includes a plurality of microlenses; an optical film which includes a first polarizing plate provided on a light-outgoing side of the microlens array; and an optical film which includes a second polarizing plate provided on a light-incident side of the light-incident side substrate.
    Type: Application
    Filed: December 12, 2008
    Publication date: November 11, 2010
    Inventors: Tadashi Nemoto, Seishi Kosegawa, Naru Usukura, Takehiro Murao, Satoshi Shibata, Takuma Tomotoshi
  • Patent number: 7808475
    Abstract: Backlight support is provided for flat panel displays through use of phospho-luminescent materials. Photo-luminescent materials are integrated into a flat panel display such as an LCD display as a back panel substrate or by embedding in display pixels. When ambient light levels exceed a predetermined threshold the material is activated allowing a reduction in active backlight power. The active backlight may be provided by an electrically supported system such as an ELP, a light pipe, an LED, etc. By reducing the power of the active backlight in an analog manner or through decreasing the duty cycle, an overall power savings is accomplished for the display. By embedding different photo-luminescent materials that operate at different wavelengths, color display may be enhanced while reducing power consumption. Display properties, such as transparency, contrast, etc., may be adjusted to affect phospho-luminescent backlight support.
    Type: Grant
    Filed: April 12, 2007
    Date of Patent: October 5, 2010
    Assignee: Microsoft Corporation
    Inventor: Shawn M. Brown
  • Patent number: 7804561
    Abstract: A cyan-colored composition for a color filter contains a phthalocyanine blue pigment comprising either of C.I. Pigment Blue 15:3 and C.I. Pigment Blue 15:4, or both, a phthalocyanine green pigment comprising C.I. Pigment Green 7, and a pigment carrier consisting of a transparent resin, a precursor of the resin or a mixture thereof. A color filter includes a red-colored filter segment, a green-colored filter segment, a blue-colored filter segment, and a cyan-colored filter segment or a yellow-colored filter segment.
    Type: Grant
    Filed: January 10, 2007
    Date of Patent: September 28, 2010
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Hiroshi Sasaki, Kazunori Yamada, Yusuke Iida, Noriko Asashi
  • Patent number: 7804555
    Abstract: An LCD includes a transmissive liquid crystal panel, a front light unit placed in front of the transmissive liquid crystal panel and providing light for image display, and a light control unit placed at the rear of the transmissive liquid crystal panel and reflecting or transmitting incident light. A mobile station includes: an LCD having a transmissive liquid crystal panel, a front light unit placed in front of the transmissive liquid crystal panel and providing light for image display and a light control unit placed at the rear of the transmissive liquid crystal panel and reflecting or transmitting incident light, a communication unit for communicating with an exterior, and a control unit controlling the communication unit and the image display of the LCD.
    Type: Grant
    Filed: January 18, 2006
    Date of Patent: September 28, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Sung Ho Kim, Hyun Ha Hwang
  • Patent number: 7800715
    Abstract: In front of a liquid crystal display element, a surface light source is arranged which emits a light toward the liquid crystal display element and lets lights coming from its front and its back permeate therethrough. The liquid crystal display element has reflection/permeation means which is provided behind a liquid crystal cell and a liquid crystal layer, and which reflects a part of a light that comes to each of a plurality of pixels from the front of the liquid crystal cell, and lets the other part of the light permeate the reflection/permeation means.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: September 21, 2010
    Assignee: Casio Computer Co., Ltd.
    Inventors: Toshiharu Nishino, Norihiro Arai, Kunpei Kobayashi
  • Publication number: 20100231825
    Abstract: An illumination apparatus includes: a substrate; reflective layers formed upon the substrate; and light-emitting layers formed upon respective reflective layers and disposed so as to overlap the respective reflective layers when viewed from above. The reflective layers are formed in a convex shape protruding toward the respective light-emitting layers, and when reflecting light irradiated from the light-emitting layers, diffuse and reflect the light.
    Type: Application
    Filed: March 8, 2010
    Publication date: September 16, 2010
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Norio KOMA, Kenji TANASE, Yasushi KARASAWA, Tadayoshi IKEHARA
  • Patent number: 7796211
    Abstract: An exemplary backlight module (20) includes a light guide plate (250) including a light incident surface (251), a frame (280) accommodating the light guide plate and including a side wall (281), light emitting units (270) adjacent to the light incident surface of the light guide plate, and elastic members (240). The elastic members are detachably engaged with the side wall of the frame. Each elastic member is configured to elastically urge a corresponding light emitting unit such that the light emitting unit abuts the light incident surface of the light guide plate. In other examples, each elastic member elastically urges the side wall of the frame, or elastically urges the light guide plate. A liquid crystal display device using the backlight module is also provided.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: September 14, 2010
    Assignee: Chimei Innolux Corporation
    Inventor: Chih-Chia Yu
  • Patent number: 7796234
    Abstract: A device display includes a light guide with an optical fiber embedded in an optically transparent material, a pixel array that has a pixel aligned with a first end of the optical fiber, and a reflective mechanism provided at a second end of the optical fiber. The reflective mechanism is capable of reflecting light, received by the pixel, back to the pixel via the optical fiber.
    Type: Grant
    Filed: April 23, 2007
    Date of Patent: September 14, 2010
    Assignee: Sony Ericsson Mobile Communications AB
    Inventors: Mats Kleverman, Gunnar Klinghult, Mats Wernersson
  • Patent number: 7777833
    Abstract: A double-side illumination apparatus includes a light source, an isotropic light guide plate including an incident plane on which light emitted from the light source is incident, an opposite plane facing the incident plane, and upper and lower surfaces through which the light is out-coupled. Isotropic micro-structures are formed on the upper and lower surfaces of the isotropic light guide plate, respectively, and first and second anisotropic layers are respectively formed on the upper and lower surfaces of the isotropic light guide plate so as to completely cover the isotropic micro-structures. Herein, the first and second anisotropic layers have different refractive indices with respect to light having first and second polarization components that are perpendicular to each other.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: August 17, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seong-mo Hwang, Dong-ho Wee, Seung-ho Nam
  • Patent number: 7768605
    Abstract: A display stack-up (300) is provided for a mobile electronic device (100) having an internal and external display, for example, a clamshell style mobile phone. The display stack-up comprises a backlight unit (114) and an external display device (110) having bi-stable optical states. The external display device (110) is placed in contact with, and is optically coupled to, the backlight unit (114). The display stack-up further comprises an internal display device (106) which is placed in contact with, and is optically coupled to, the external display device (110).
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: August 3, 2010
    Assignee: Motorola, Inc.
    Inventor: Robert D. Polak
  • Patent number: 7760296
    Abstract: The present invention provides for improved contrast in the transmissive mode of a transflective liquid crystal display having a rear stack polarizing means (302) which is transmissive for light having a desired polarization and reflective for light having an opposite, undesired polarization. The contrast is improved due to enhancements of the black state provided by the inclusion of a reflection preventing means (306). The reflection preventing means is arranged between the transflector (301) and the rear stack polarizer (302), and serves to stop light transmitted through the rear stack polarizer (302) towards the transflector (301) from being reflected by the transflector (301) back to the rear polarizer (302). Thereby undesired reflections having wrong polarization are stopped from being transmitted through the transflector (301) and thus from affecting the transmissive mode black state of the display.
    Type: Grant
    Filed: September 3, 2004
    Date of Patent: July 20, 2010
    Assignee: TPO Hong Kong Holding Limited
    Inventors: Nicole Alide Christianne Maria Gotink-Meinders, Rudolf Jozef Marie Beeren
  • Patent number: 7760284
    Abstract: A liquid crystal device includes a liquid crystal panel; light sources; a light guide plate, opposed to the light sources, for guiding light emitted from the light sources to the liquid crystal panel; a flexible printed circuit board electrically connected to the liquid crystal panel; and a housing accommodating the liquid crystal panel and the light guide plate. The flexible printed circuit board is fixed to the rear face of the light guide plate in such a state that the flexible printed circuit board is curved. The liquid crystal panel is fixed to the housing with a light-shielding double-faced tape placed outside a display region including a sub-region containing the light sources. The light sources are spaced from the light-shielding double-faced tape with an adhesion-preventing member disposed therebetween or adhesion-preventing treatment is performed.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: July 20, 2010
    Assignee: Epson Imaging Devices Corporation
    Inventor: Tetsuji Murase
  • Publication number: 20100149456
    Abstract: A liquid crystal display device (100) according to the present invention includes: a scattering liquid crystal panel (110) including a scattering-type liquid crystal layer (140) which is capable of taking a transparent state; and a scattering state and a retroreflection plate (150). The scattering liquid crystal panel (110) before being combined with the retroreflection plate (150) satisfies the relationship of 0.45?log(I0-10/I20-30)?1.48, where, regarding light which enters through a rear face (110b) of the scattering liquid crystal panel (110) and goes out through a front face (110a), I0-10 represents a mean value of scattering intensity of light which goes out at an angle in a range from 0 degrees to 10 degrees with respect to a normal direction of the front face (110a), and I20-30 represents a mean value of scattering intensity of light which goes out in a range from 20 degrees to 30 degrees.
    Type: Application
    Filed: May 2, 2008
    Publication date: June 17, 2010
    Inventors: Sayuri Fujiwara, Kiyoshi Minoura, Eiji Satoh, Yasushi Asaoka
  • Patent number: 7733437
    Abstract: Provided are a display device and a mobile terminal having the same. The display device comprises a transmissive liquid crystal panel, a first backlight unit on a rear side of the transmissive liquid crystal panel, a second backlight unit on a front side of the transmissive liquid crystal panel, and an optical shutter outside at least one of the first and second backlight units.
    Type: Grant
    Filed: August 1, 2007
    Date of Patent: June 8, 2010
    Assignee: LG Innotek Co., Ltd.
    Inventors: Hyun Ha Hwang, Seung Gon Kang
  • Patent number: 7714956
    Abstract: A front-illuminating device of the present invention, which is placed over the entire surface of an object to be illuminated such as a reflection-type liquid crystal display device when it is used, is provided with a light source and a light-directing body. The light-directing body has an incident surface on which light from the light source (light-source light) is made incident, a first light-releasing surface for releasing the light toward the object to be illuminated, and a second light-releasing surface which faces the first light-releasing surface and releases reflected light from the object to be illuminated. The second light-releasing surface is formed into a step shape in which slanting portions and flat portions are alternately placed.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: May 11, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yutaka Sawayama, Yukihiro Sumida, Takeshi Masuda, Tsuyoshi Ebi
  • Patent number: 7708451
    Abstract: A bottom frame for a liquid crystal display device includes a bottom surface, four side surfaces attached to the bottom surface, the four side surfaces along with the bottom surface define a space, first and second holes in two side surfaces, the first and second holes opposite to each other in two opposite side surfaces, and affixing structures at the bottom surface and spaced apart from each other.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: May 4, 2010
    Assignee: LG Display Co., Ltd.
    Inventors: Myong-Gi Jang, Hak-Mo Hwang
  • Publication number: 20100053501
    Abstract: A liquid crystal display device includes at least a liquid crystal display panel, which uses a pair of transparent substrates which are arranged to face each other with liquid crystal disposed therebetween as an envelope, and a light guide plate, which guides light from a light source, being sequentially arranged from a viewer side. The liquid crystal display panel forms light reflection layers on a liquid-crystal-side surface of the light-guide-plate side transparent substrate using portions of respective pixels and forms color filters which face the light reflection layers on the liquid-crystal-side surface of one transparent substrate or a liquid-crystal-side surface of the other transparent substrate which faces the one transparent substrate. Light from the light source is irradiated such that respective colors thereof, which constitute three primary colors, are sequentially changed over.
    Type: Application
    Filed: November 13, 2009
    Publication date: March 4, 2010
    Inventors: Yoshiaki Nakayoshi, Kazuhiko Yanagawa
  • Patent number: 7661835
    Abstract: A direct type backlight has a plate and a plurality of light emitting diode (LED) rows. The LED rows are disposed on the plate, and every two adjacent LED rows have a row gap positioned therebetween. The one of these gaps, which is nearest to the center of the direct type backlight, is a minimum gap.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: February 16, 2010
    Assignee: AU Optronics Corp.
    Inventors: Shen-Hong Chou, Hui-Kai Chou
  • Patent number: 7643105
    Abstract: The present invention is to provide a system that displays interactive messages by light emission of preset response depending on the direction of the light from indefinite light source; a light collecting device is used to collect the incidental light from an indefinite light source into clustered beam with higher luminance to be projected into one end of a light guide device before being projected in one direction or multi directions from another end of the light guide device, or light emitted display of selected text or graphics.
    Type: Grant
    Filed: March 25, 2005
    Date of Patent: January 5, 2010
    Inventor: Tai-Her Yang
  • Patent number: 7639317
    Abstract: A backlight unit of a liquid crystal display device includes a mold frame having a receiving space for receiving a reflection sheet, a prism sheet a diffusion sheet, a plurality of light-emitting diodes, and a shielding tape for affixing the reflection sheet, the prism sheet, the plurality of light-emitting diodes and the diffusion sheet within the receiving space, wherein a first color is colored at a plurality of first colored areas at a lower surface of the shielding tape corresponding to the plurality of light-emitting diodes and a second color is colored at a remaining area of the lower surface of the shielding tape other than the plurality of first colored areas.
    Type: Grant
    Filed: December 18, 2006
    Date of Patent: December 29, 2009
    Assignee: LG Display Co., Ltd.
    Inventor: Ki Hyun Cho