Diffuser Between Light Source And Liquid Crystal Patents (Class 349/64)
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Patent number: 8896802Abstract: A surface light source unit includes, in the following order: a light source; a light collecting sheet having light collection portions on at least one side of the light collecting sheet; and a light transmissive substrate having a flat portion and recesses on at least one side of the light transmissive substrate.Type: GrantFiled: September 24, 2010Date of Patent: November 25, 2014Assignee: Fujifilm CorporationInventors: Hiroyuki Yoneyama, Yasuyuki Sasada, Yujiro Yanai
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Patent number: 8891051Abstract: A backlight of which power consumption can be reduced is provided. Further, by effective use of light emitted from the backlight, a display device with low power consumption is provided. The display device includes a light source device in which a plurality of light-emitting elements are arranged, a diffusion plate which is bonded to the light source device, a first polarizing plate which is bonded to the diffusion plate, a liquid crystal panel which is bonded to the first polarizing plate, and a second polarizing plate which is bonded to the liquid crystal panel. The light source device includes an organic resin having a projected spherical surface and a light-transmitting property covering each of the plurality of light-emitting elements and an organic resin having a planarized surface and a light-transmitting property covering the plurality of light-emitting elements and the organic resin having a projected spherical surface and a light-transmitting property.Type: GrantFiled: October 24, 2011Date of Patent: November 18, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Yoshiharu Hirakata
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Patent number: 8891038Abstract: Lightguide is disclosed. The lightguide includes a light guiding layer for propagating light by total internal reflection, and an optical film that is disposed on the light guiding layer. The optical film includes a plurality of voids, an optical haze that is not less than about 30%, and a porosity that is not less than about 20%. Substantial portions of each two neighboring major surfaces in the lightguide are in physical contact with each other.Type: GrantFiled: April 14, 2010Date of Patent: November 18, 2014Assignee: 3M Innovative Properties CompanyInventors: William D. Coggio, John A. Wheatley, Tao Liu, Brian W. Ostlie, Encai Hao, William Blake Kolb, Qingbing Wang, Michael Benton Free, Michael L. Steiner, Scott M. Tapio
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Publication number: 20140333873Abstract: A display device including a display panel configured to display, a backlight unit configured to emit light toward the display panel, a pattern layer having a pattern formed to compensate for short-wavelength light among light emitted the backlight unit, and a diffusion plate configured to diffuse the compensated short-wavelength light and the light emitted from the backlight unit, so that the non-uniform color generated due to the color breakup is improved by use of blue ink having a bead shape that is disposed on the diffusion plate.Type: ApplicationFiled: May 9, 2014Publication date: November 13, 2014Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sin Wook HYUNG, Young Man AHN, Kil Hong LEE, Dae Hee LEE, Hyeong Sik CHOI
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Publication number: 20140333874Abstract: A liquid crystal display device has at least: a first and a second polarizing layers arranged so that respective absorption axes thereof are orthogonal to each other; a first and a second substrates arranged opposite to each other between the first and second polarizing layers, at least either one of which has a transparent electrode; a twisted alignment mode liquid crystal cell arranged between the first and the second substrates; a first optical compensation film arranged between the first polarizing layer and the liquid crystal cell, including a first transparent support and a layer formed by curing a composition containing a first liquid crystal compound; and a second optical compensation film arranged between the second polarizing layer and the liquid crystal cell, including a second transparent support and a layer formed by curing a composition containing a second liquid crystal compound, as defined herein.Type: ApplicationFiled: July 29, 2014Publication date: November 13, 2014Applicant: FUJIFILM CorporationInventors: Hiroshi SATO, Yujiro YANAI, Megumi SEKIGUCHI, Akira YAMAMOTO
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Publication number: 20140327858Abstract: The present invention relates a prism sheet, and a back light unit and a liquid crystal display device therewith, in which total thickness of a back light unit is reduced while taking place of the lamp mura is prevented, for improving a picture quality. The prism sheet includes a plurality of first prism mountains formed on a supporting film at regular intervals, a resin layer filled between the first prism mountains, and a plurality of second prism mountains formed on the resin layer and the first prism mountains with at intervals greater than the intervals of the first prism mountains.Type: ApplicationFiled: July 17, 2014Publication date: November 6, 2014Applicant: LG Display Co., Ltd.Inventor: Young-Hun JEONG
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Patent number: 8879022Abstract: Disclosed is a liquid crystal display (LCD) device capable of stable support of components. The LCD device comprises an LCD panel; a main support for supporting edges of the LCD panel; a light guide plate disposed at a rear side of the LCD panel; and at least one first pad for preventing the movement of the light guide plate through contact with the light guide plate between the main support and the light guide plate, wherein at least one first pad supporting portion is formed at one surface of the main support being faced with the light guide plate. Accordingly, defects of the LCD device resulting from an external force such as impact or heat are minimized, and the LCD device has a firm and stable structure.Type: GrantFiled: December 31, 2007Date of Patent: November 4, 2014Assignee: LG Display Co., Ltd.Inventor: Guen-Taek Oh
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Patent number: 8876320Abstract: A direct type backlight is provided in the disclosure and comprises: light emitting bodies; a reflecting sheet disposed below the light emitting bodies; a back plate disposed below the reflecting sheet; and a diffusing plate disposed above the light emitting bodies, wherein the backlight further comprises a reflection-enhancing layer disposed between the diffusing plate and the light emitting bodies, and the transflective layer has, on a side thereof facing the light emitting bodies, a reflectivity that is greater than a reflectivity of the diffusing plate and smaller than 1.Type: GrantFiled: March 20, 2012Date of Patent: November 4, 2014Assignees: Boe Technology Group Co., Ltd., Suzhou Boe Chatani Electronics Co., Ltd.Inventor: Wentao Ying
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Publication number: 20140320783Abstract: A condensing sheet, a backlight unit and a liquid crystal display device using the same are disclosed. The condensing sheet includes a base film, and a plurality of ,condensation patterns formed on the base film, wherein a first area and a second area are alternately defined on an upper surface of the base film, at least two condensation patterns are arranged in the first area, and a flat surface is formed in the second area, and wherein a width of each of the condensation patterns may be greater than a width of the flat surface.Type: ApplicationFiled: December 19, 2013Publication date: October 30, 2014Applicant: LG Display Co., Ltd.Inventor: Young-Bae HAN
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Patent number: 8871315Abstract: Optical films are described having a polymerized microstructured surface that comprises the reaction product of a polymerizable resin composition comprising at least one polymerizable ethylenically unsaturated triphenyl monomer. Also described are certain triphenyl(meth)acrylate monomers and polymerizable resin compositions.Type: GrantFiled: September 10, 2013Date of Patent: October 28, 2014Assignee: 3M Innovative Properties CompanyInventors: Bryan V. Hunt, Kyle J. Lindstrom, Judith M. Invie, David B. Olson, Anthony M. Renstrom
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Patent number: 8872973Abstract: A light guiding system, an edge type backlight module and a liquid crystal display are disclosed. The light guiding system includes an ambient light collection system facing toward ambient light to absorb the ambient light and to generate absorbed light, a plurality of light guiding devices, and at least a first and a second light guiding bar. Each of the light guiding devices includes a light emitting end and a light incident end. The light incident ends of the optical fibers are arranged close to the ambient light collection system, and the lights entered from the light incident ends are propagated toward the light emitting ends. Each of the light guiding bars includes a light emitting surface, a light incident surface connected to the light emitting surface, and a first lateral side opposite to the light incident surface.Type: GrantFiled: January 28, 2013Date of Patent: October 28, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., LtdInventors: Che-chang Hu, Kuang-yao Chang, Chao Ning, Yong Fan
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Patent number: 8864361Abstract: A backlight unit includes: a wiring board having a light source mounted thereon; a light guide plate; a light-shielding pressure-sensitive adhesive sheet; and a light diffusion sheet. The front surface of the light guide plate includes an effective region serving as the planar light source and a light entering region ranging from the end surface into which the light enters to the effective region. The wiring board and the light-shielding pressure-sensitive adhesive sheet each have a part positioned in the light entering region. The light diffusion sheet is arranged from the effective region to the light entering region, and overlaps with the light-shielding pressure-sensitive adhesive sheet in the light entering region. On a side closer to the effective region with respect to the light-shielding pressure-sensitive adhesive sheet, the light entering region is covered with the light diffusion sheet without a gap.Type: GrantFiled: August 13, 2012Date of Patent: October 21, 2014Assignee: Japan Display Inc.Inventors: Munenori Motooka, Nobuyuki Suzuki
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Publication number: 20140307202Abstract: A polarization plate is provided for use between a light source and a display panel, where the light source is configured to emit light having a plurality of planes of polarization and the display panel is configured to have a predetermined polarization axis. The plate includes a repolarization region and a prepolarization region. The repolarization region is configured to diffuse and to depolarize or rotate at least one plane of polarization of the light passing therethrough. The prepolarization region is disposed adjacent to and in contact with the repolarization region. The prepolarization region is configured to be substantially nonabsorbent, to allow passage of light having a plane of polarization that is substantially aligned with the predetermined polarization axis, and to prevent passage of light having a plane of polarization that is not substantially aligned with the predetermined polarization axis. In another embodiment, an interface is provided between the regions.Type: ApplicationFiled: June 25, 2014Publication date: October 16, 2014Applicant: HONEYWELL INTERNATIONAL INC.Inventors: L. S. Lamberth, Jr., Ravindra R. Laddu, Brent D. Larson
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Patent number: 8860907Abstract: There are provided light-emitting layer provided on transparent substrate and emitting light of a specific wavelength, first reflecting layer formed on a light exit side relative to light-emitting layer and including a function of reflecting light emitted from light-emitting layer, second reflecting layer provided on a side of substrate in a manner to interpose light-emitting layer between first reflecting layer and second reflecting layer; light diffusion layer that diffuses light emitted from light-emitting layer is disposed between first reflecting layer and second reflecting layer; and second reflecting layer is formed of a high reflective metallic layer formed of a metallic film having a high reflectivity, a low refractive index layer formed of a material film having a low refractive index, and a multilayer-film reflective layer formed by laminating films made of materials having different reflectivity.Type: GrantFiled: February 21, 2012Date of Patent: October 14, 2014Assignee: Panasonic CorporationInventors: Masahiro Kasano, Kouki Ichihashi
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Publication number: 20140300844Abstract: A display device includes a light source placement surface, a display panel provided opposite the light source placement surface and that comprises a pair of first sides, a first light source cluster that passes through a predetermined central area of the light source placement surface and that comprises a plurality of light sources disposed on the light source placement surface along a direction of the first sides, and a second light source cluster that includes at least one light source mounted to a corner portion of the light source placement surface and that comprises a plurality of light sources disposed on the light source placement surface in a direction heading from the corner portion to the central area.Type: ApplicationFiled: April 1, 2014Publication date: October 9, 2014Applicant: FUNAI ELECTRIC CO., LTD.Inventor: Naoki Nitanai
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Patent number: 8854574Abstract: A film-shaped lightguide plate unit enables reductions in thickness and weight. The film-shaped lightguide plate unit (7) has a film-shaped lightguide plate (6) and a support frame (8) made of a film material to support at least the outer peripheral edge of the film-shaped lightguide plate (6). Optical sheets including the film-shaped lightguide plate, a diffusing sheet, a prism sheet, etc. are disposed inside the support frame.Type: GrantFiled: August 22, 2008Date of Patent: October 7, 2014Assignee: Citizens Electronics Co., Ltd.Inventors: Yoshitake Horiuchi, Tatsuro Yamada
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Patent number: 8850714Abstract: A chromaticity correction device corrects chromaticity of a video signal displayed on a display panel of a display device to correspond to a change in a luminance value of the display panel. The chromaticity correction device includes a luminance detection unit which detects the luminance value, a backlight driving level detection unit which detects a backlight driving level, a temperature detection unit which detects an internal device temperature or an ambient temperature, a reference luminance value calculation unit which estimates a reference luminance value in a characteristic of an initial state, a chromaticity calculation unit which obtains a chromaticity change amount of white point chromaticity and estimated white point chromaticity that is an estimated value of current white point chromaticity, a chromaticity correction value calculation unit which obtains a chromaticity correction value and a chromaticity correction circuit which corrects the chromaticity of the video signal.Type: GrantFiled: September 30, 2011Date of Patent: October 7, 2014Assignee: NEC Display Solutions, Ltd.Inventor: Katsuyuki Matsui
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Patent number: 8848136Abstract: The present invention provides a display device which can ensure a large viewing angle while maintaining high light source energy use efficiency. The display device 10, which outputs light emitted from a light source 25 to an observer side in a form of an image, comprises: a light guide plate 21 which has a light output face, a back face, and a side face positioned between the light output face and the back face; a light source 25 which emits light to the side face of the light guide plate; an optical sheet 30 disposed on the observer side of the light guide plate; a liquid crystal panel 15 disposed on the observer side of the optical sheet; and a device 40 for enlarging a view disposed on the observer side of the liquid crystal panel.Type: GrantFiled: May 13, 2011Date of Patent: September 30, 2014Assignee: Dai Nippon Printing Co., Ltd.Inventors: Masahiro Gotou, Hiroshi Sekiguchi, Hiroshi Yamamoto
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Patent number: 8848132Abstract: A backlight (120) that includes a front reflector (130) and a back reflector (160) that form a hollow light recycling cavity (162) having an output surface (164) is disclosed. The front reflector includes at least four directional recycling films (132). The backlight also includes a semi-specular diffuser disposed between the front reflector and the back reflector, and one or more light sources (166) disposed to emit light into the light recycling cavity.Type: GrantFiled: February 6, 2009Date of Patent: September 30, 2014Assignee: 3M Innovative Properties CompanyInventors: Mark B. O'Neill, Shandon D. Hart, Kenneth A. Epstein, David G. Freier, David J. Lamb
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Publication number: 20140285749Abstract: The present disclosure describes an optical stack that includes an asymmetric diffuser. As described herein, use of an asymmetric diffuser in an optical stack reduces undesirable defects in a display while maintaining optical gain and/or contrast of the display.Type: ApplicationFiled: November 21, 2012Publication date: September 25, 2014Inventors: Adam D. Haag, Tri D. Pham, Steven H.C. Kong, Stephen J. Etzkorn, Robert L. Endres, Matthew B. Johnson
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Patent number: 8842239Abstract: A light-guide apparatus for accompanying an edge light source to form a backlight module for an LCD display includes an upper light-distributing layer, a middle light-guiding layer and a lower reflective layer. The light-guiding layer further defines a light-introducing surface for allowing lights emitted from the edge light source to enter the light-guiding layer. The reflective layer reflects the lights back to the light-guiding layer. A light-exiting surface for allowing at least a portion of the lights to leave the light-guiding layer is defined on the top surface of the light-distributing layer and is perpendicular to the light-introducing surface. The light-distributing layer, the light-guiding layer and the reflective layer are manufactured integrally into a unique piece by a co-extrusion process so as to avoid possible existence of air spacing in between. Three-dimensional micro-structures are constructed on a reflective surface interfacing the reflective layer and the light-guiding layer.Type: GrantFiled: July 20, 2011Date of Patent: September 23, 2014Assignee: Entire Technology Co., Ltd.Inventors: Jia-Jen Chen, Yu-Chun Tao, Yan Zuo Chen, Hao-Xiang Lin, Cheng-Yu Hsieh
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Patent number: 8836889Abstract: Disclosed is a transparent display device including a light guide plate formed with a plurality of concave patterns at the lower surface thereof to totally reflect polarized light entered in a lateral direction while transmitting natural light entered from a lower direction therethrough; a light source disposed in a lateral direction of the light guide plate to emit visible light including first and second polarized lights; a first polarizing plate disposed at a lateral portion of the light guide plate to transmit either one of the first and second polarized lights through the light guide plate; a liquid crystal panel for driving liquid crystals to change the phase of the polarized light; and a second polarizing plate for controlling an amount of the polarized light according to the changed phase of the polarized light.Type: GrantFiled: July 14, 2010Date of Patent: September 16, 2014Assignee: LG Display Co., Ltd.Inventors: Se-Hong Park, Jong-Sin Park
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Patent number: 8836896Abstract: The present disclosure relates to an optical sheet for controlling the direction of light rays which is used for manufacturing backlight units of TFT-LCDs for computer monitors and televisions, and more specifically to an optical sheet which can uniformly diffuse light, improve brightness, and adjust viewing angle. There is provided an optical sheet for controlling the direction of light rays comprising a substrate film; a microlens group arranged on a first face of the substrate film; and a plurality of protuberances formed on a second face of the substrate film, wherein each protuberance comprises a reflective layer at the bottom thereof, and the plurality of protuberances comprise an aperture formed therebetween, and wherein a unit microlens of the microlens group has a first side and a second side with different radii of curvature from each other with respect to a light emission control part thereof.Type: GrantFiled: September 10, 2009Date of Patent: September 16, 2014Assignee: Toray Advanced Materials Korea Inc.Inventors: Jun-Sang Park, Jeong-Tae Seo, Hee-Cheong Lee, Sang-Hoon Lee, Tae-Yong Ryu
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Publication number: 20140253844Abstract: A liquid crystal display device includes a liquid crystal panel, a pair of polarizing layers, a lighting device, and an output angle control member. The liquid crystal panel includes a pair of substrates, and a liquid crystal layer. The liquid crystal layer is interposed between the pair of substrates. The pair of polarizing layers is arranged on a light input side and a light output side of the liquid crystal layer. The lighting device is arranged on the light input side of the liquid crystal panel and radiates light toward the liquid crystal panel. The output angle control member is arranged on the light output side of the liquid crystal panel and controls an output angle of light which is output from the liquid crystal panel.Type: ApplicationFiled: October 19, 2012Publication date: September 11, 2014Applicant: Sharp Kabushiki KaishaInventors: Emi Yamamoto, Tsuyoshi Maeda, Toru Kanno, Tsuyoshi Kamada, Shohei Katsuta
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Patent number: 8830421Abstract: A display device including a sub-backlight unit which can prevent the obscure sights caused by light from the light source of the sub-backlight unit arriving on an article or reel of the main display screen and then reflecting in the frontal direction is provided. The sub-backlight unit includes a second light guide panel having an opening part formed therein corresponding to a transparent window, a second light source disposed around the second light guide panel, and a polymer dispersed liquid crystal (PDLC) sheet disposed close to the front side of the opening of the second light guide panel.Type: GrantFiled: June 1, 2011Date of Patent: September 9, 2014Assignee: Kortek CorporationInventors: Kyoung Chan Lee, Gun Ho Lee
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Patent number: 8827478Abstract: A backlight unit which is a lighting device is provided with: a diffusion plate; a chassis having rising sections which are provided at the outer periphery of the main flat surface thereof and supporting the diffusion plate; light-emitting modules disposed at the main flat surface and the rising sections of the chassis and applying light to the diffusion plate; and reflecting sheets disposed at the main flat surface and the rising sections of the chassis and reflecting the light, which is emitted from the light-emitting modules, toward the diffusion plate. The reflecting sheets have formed thereon sloped sections for reflecting, toward the diffusion plate, the light emitted from the light-emitting modules disposed at the rising sections.Type: GrantFiled: June 16, 2010Date of Patent: September 9, 2014Assignee: Sharp Kabushiki KaishaInventor: Yasumori Kuromizu
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Patent number: 8820996Abstract: An illumination optical device includes a light source, a light pipe guiding illumination light from the light source, a diffuser arranged on an emitting surface side of the light pipe. A width of the emitting surface of the light pipe in the horizontal direction is set greater than a width of an illuminated object, and a width of the emitting surface of the light pipe in the vertical direction is set smaller than a width of the illuminated object.Type: GrantFiled: July 27, 2009Date of Patent: September 2, 2014Assignee: Sony CorporationInventors: Kazuma Aiki, Satoshi Nakano
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Patent number: 8823901Abstract: The present invention relates a prism sheet, and a back light unit and a liquid crystal display device therewith, in which total thickness of a back light unit is reduced while taking place of the lamp mura is prevented, for improving a picture quality. The prism sheet includes a plurality of first prism mountains formed on a supporting film at regular intervals, a resin layer filled between the first prism mountains, and a plurality of second prism mountains formed on the resin layer and the first prism mountains with at intervals greater than the intervals of the first prism mountains.Type: GrantFiled: June 3, 2009Date of Patent: September 2, 2014Assignee: LG Display Co., Ltd.Inventor: Young-Hun Jeong
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Patent number: 8821966Abstract: A method for manufacturing an image display device includes the step of forming a cured resin layer by interposing a photo-curable resin composition between a protection member and a display-side panel including an image display unit and a frame member and then photo-curing the photo-curable resin composition, with the photo-curable resin composition being disposed across between the image display unit and the frame member. In the manufacturing method, a high-viscosity resin composition having a viscosity of 3000 mPa·s or more and 12000 mPa·s or less is used as the photo-curable resin composition. Alternatively, after a gap between the image display unit and the frame member is sealed with a sealing film, a photo-curable resin composition is interposed between the display-side panel and the protection member.Type: GrantFiled: April 9, 2008Date of Patent: September 2, 2014Assignee: Dexerials CorporationInventors: Tomoyuki Toyoda, Yoshihisa Shinya, Yusuke Kamata
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Patent number: 8817206Abstract: A backlight module is for providing light to a liquid crystal panel having a visible region. The backlight module includes a light guide plate, light emitting units, a mesh dot layer, and a diffusing tape. The light emitting units are disposed at a position corresponding to a light entrance surface of the light guide plate for emitting light to the light entrance surface. The mesh dot layer is disposed on a bottom surface of the light guide plate. A side of the mesh dot layer corresponding to the light entrance surface is shifted inward by a first distance relative to a side of the visible region corresponding to the light entrance surface. The diffusing tape is attached onto the bottom surface corresponding to the light entrance surface for diffusing light in the light guide plate to a light exit surface of the light guide plate.Type: GrantFiled: November 15, 2012Date of Patent: August 26, 2014Assignee: Wistron CorporationInventors: Jyun-Sheng Syu, Chun-Yu Kuan, Tzu-Ting Hsia, Jing-Sian Chen
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Publication number: 20140235323Abstract: A display device includes: a first liquid crystal display device; a second liquid crystal display device which is disposed behind the first liquid crystal display device to be overlapped in a forward/rearward direction; and a light diffusion plate which is disposed between the first and second liquid crystal display devices. The first liquid crystal display device includes: a liquid crystal panel; a color filter plate which is disposed in front of the liquid crystal panel, a predetermined region of the color filter plate being removed; a polarizer plate which is disposed at a front and/or a rear of the liquid crystal panel; and a light source which is disposed behind the liquid crystal panel. The light diffusion plate is disposed between the first liquid crystal display device and the second liquid crystal display device to be overlapped with an area including the predetermined region in a forward/rearward direction.Type: ApplicationFiled: October 11, 2012Publication date: August 21, 2014Applicants: TOVIS CO., LTD., TOVIS CO., LTD.Inventors: Yong-Beom Kim, Yang-Rae Kim
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Patent number: 8810752Abstract: A thin backlight system includes: a light emitting section emitting lights that have different dominant wavelengths; and a plurality of light transmitting portions, the thin backlight system deflecting the lights and then converging the lights on the plurality of light transmitting portions. The thin backlight system further includes: an imaging optical system provided to face surfaces, of the plurality of light transmitting portions, on which the lights are converged. The imaging optical system including a plurality of identical lenses arranged in a vertical and/or a horizontal direction at a pitch determined by multiplying a pitch at which the plurality of light transmitting portions are arranged in a vertical and/or a horizontal direction by the number of types of the different dominant wavelengths and being configured to converge the lights from the light emitting section on light transmitting portions to which the different dominant wavelengths of the lights correspond.Type: GrantFiled: October 21, 2009Date of Patent: August 19, 2014Assignees: Sharp Kabushiki Kaisha, Tohoku UniversityInventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Takahiro Ishinabe, Baku Katagiri, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
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Patent number: 8810749Abstract: A backlight source and a thinning method for the same are provided. The backlight source includes: a solid state light source array having a plurality of solid state light sources distributed on the base, a light transmitting unit arranged above the solid state light source array, and a plurality of light adjusting units arranged between the solid state light source array and the light transmitting unit. The plurality of the light adjusting units is arranged above the plurality of solid state light sources to reflect the shallow angle incident light from the solid state light source, thus changes the light intensity distribution of the output light through the light transmitting unit from the solid state light sources from Lambertian distribution to main sides emission.Type: GrantFiled: July 1, 2010Date of Patent: August 19, 2014Assignee: Appotronics Ltd.Inventor: Yi Li
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Patent number: 8807818Abstract: A backlight device wherein LEDs which are arranged side by side at a first arrangement interval (P1) are provided to each LED unit. The LED units are mounted to a flexible board at a second arrangement interval. A light guide plate is disposed in such a manner that an end surface thereof is spaced from the LEDs by a distance (H). The light guide plate is disposed so as to satisfy the following relationship: first arrangement interval (P1)<distance (H)<second arrangement interval (P2). Specifically, the LEDs are arranged side by side in such a manner that the first arrangement interval (P1) is not less than 0.1 mm but not greater than 3 mm and the second arrangement interval (P2) is not less than 5 mm but not greater than 15 mm. The light guide plate is disposed in such a manner that the distance (H) is not less than 1 mm but not greater than 7 mm.Type: GrantFiled: October 22, 2013Date of Patent: August 19, 2014Assignee: JVC KENWOOD CorporationInventors: Naoto Hirohata, Yasuhiro Ueki, Nobuyoshi Yamagishi, Takuya Kakinuma, Mikio Okumura
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Publication number: 20140226107Abstract: A display apparatus includes a liquid crystal display panel configured to display an image, and a backlight unit configured to emit light to the liquid crystal display panel, wherein the backlight unit includes a bottom chassis comprising an accommodation space configured to accommodate a plurality of light sources, a middle mold provided on the bottom chassis, a diffusing plate provided on the middle mold, and a fixing member provided on an outer surface of the bottom chassis and configured to contact one side of the diffusing plate and prevent movement of the diffusing plate.Type: ApplicationFiled: February 7, 2014Publication date: August 14, 2014Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sin Wook HYUNG, Chang Hwa BAEK, Dae Hee LEE, Kyoung Choul JANG, Hyeong Sik CHOI
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Patent number: 8804072Abstract: The present invention discloses a backlight module and a liquid crystal display. The reflection surface and the light emitting surface of a light guide plate have two bottom surfaces and two lateral surfaces located therebetween. The two bottom surface comprises a supporting surface. The backlight module further comprises a support post. The supporting surface has an inclined contact surface disposed thereon. The support post is attached to the inclined contact surface. A gravitational force is in a direction parallel to a length of a light source. The force acting between the light guide plate and the support post is formed when a change of the light guide plate occurs along the gravitational force. The support post can push the light guide plate toward the light source under the acting force.Type: GrantFiled: April 11, 2012Date of Patent: August 12, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventor: Kuangyao Chang
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Patent number: 8804070Abstract: A liquid crystal display device includes a liquid crystal display panel and a backlight including a diffusion medium located between lamps and a diffusion plate to diffuse light. The diffusion medium includes an external band of square type diffusion medium and a plurality of ribs formed of the diffusion medium connected to both sides of the external band of square type diffusion medium. The ribs include a plurality of first ribs which are directly located over the lamps, a plurality of second ribs which are located between the first ribs, and a third rib which connects each of the ribs to each other.Type: GrantFiled: September 8, 2011Date of Patent: August 12, 2014Assignee: LG Display Co., Ltd.Inventors: Jeong Min Moon, Eun Ju Kim
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Patent number: 8804066Abstract: A backlight unit has a light source area. The width of the light source area in a first direction is shorter than the width of a liquid crystal panel in the first direction. A plurality of LED modules (31) are arranged along the second direction perpendicular to the first direction. End lenses (41A, 41B) and a middle lens (42) for enlarging a light divergence angle are disposed on the plurality of LED modules (31). The direction in which the end lens (41A, 41B) enlarges the light divergence angle differs from that in which the middle lens (42) enlarges the divergence angle. This structure can reduce difference in brightness of the liquid crystal panel, while reducing the number of light sources.Type: GrantFiled: October 18, 2011Date of Patent: August 12, 2014Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Ikuko Imajo, Sachiko Yamazaki, Kikuo Ono
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Patent number: 8801210Abstract: Provided is a backlight device having: a light source element having light emitting diodes and a lens expanding light from the light emitting diodes; a housing containing the light source element; a diffuser plate covering an opening portion of the housing; and a reflection sheet reflecting light emitted from the light source element, toward the diffuser plate. In the light source element, a plurality of the lenses are arranged at a central zone, the plurality of lenses being arranged in a plurality of rows.Type: GrantFiled: September 14, 2012Date of Patent: August 12, 2014Assignee: Panasonic CorporationInventors: Daizaburo Matsuki, Katsuhiko Hayashi, Kenji Hasegawa, Hiroshi Yamaguchi
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Patent number: 8804068Abstract: In order to fix lenses of light emitting diodes stably without impairing heat dissipation performance in a liquid crystal display device, the liquid crystal display device includes: a liquid crystal panel; and a light emitting diode substrate (7), which is disposed on a rear surface side of the liquid crystal panel and includes: a plurality of light emitting diode elements (22) disposed along a longitudinal direction; lenses (20) each including a plurality of legs (21), the lenses being disposed on the liquid crystal panel side of the light emitting diode elements (22); and electrodes (23) which are formed on a surface of the light emitting diode substrate (7) and are electrically connected to the light emitting diode elements (22), and all the legs (21) for fixing the lenses (20) to the light emitting diode substrate (7) are disposed directly above the electrodes (23).Type: GrantFiled: January 23, 2012Date of Patent: August 12, 2014Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Masashi Baba, Ikuko Imajo
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Patent number: 8794799Abstract: An optical sheet having both of an excellent light condensing function and an excellent scratch resistance is provided. An optical sheet includes: a sheet-like main body; at least three or more first unit shaped elements arranged on one surface of the main body; and second unit shaped elements arranged on the one surface of the main body. Each of the second unit shaped elements extend in parallel with in one direction on a sheet surface of the main body. A height H1 of each of the first unit shaped elements from the one surface is higher than a height H2 of each of the second unit shaped elements. A rate of an area occupied by the first unit shaped elements on the one surface is not more than 10.0%, when observed along a normal direction nd relative to the one surface.Type: GrantFiled: October 29, 2010Date of Patent: August 5, 2014Assignee: Dai Nippon Printing Co., Ltd.Inventors: Akinobu Ushiyama, Akiko Tomita, Satoshi Goishihara, Hiroshi Kojima, Takayuki Shimada, Mitsuhiro Hamashima, Kazuo Matsufuji, Kazuki Tanaka
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Publication number: 20140211123Abstract: A display module includes a display panel, a diffusion plate, a bottom chassis, and a transparent spacer made having a diffusion pattern formed thereon disposed on the bottom chassis to support the diffusion plate.Type: ApplicationFiled: January 31, 2014Publication date: July 31, 2014Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Dae Hee LEE, Young Man AHN, Nae Won JANG, Byoung Jin CHO, Hyeong Sik CHOI
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Patent number: 8789960Abstract: A backlight unit (49) of a display device (69) having a liquid crystal display panel (59) is provided with a chassis (41), a diffusion plate (43) supported by the chassis, and a light source which irradiates the diffusion plate with light. The light source is constructed by combining a plurality of mounting substrates (21) provided with an LED (22) which serves as the light-emitting element and a diffusion lens (24) for covering the LED. Connectors (25A) are mounted on matching edges of the plurality of mounting substrates to electrically connect the substrates. The connectors are placed so as not to interfere with the illumination light region in which the LED imparts brightness to the diffusion plate. In order to achieve this state of non-interference, a beveled part (26) is formed on the side of the connectors facing the LED.Type: GrantFiled: February 17, 2010Date of Patent: July 29, 2014Assignee: Sharp Kabushiki KaishaInventor: Masashi Yokota
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Patent number: 8792070Abstract: A polarization plate is provided for use between a light source and a display panel, where the light source is configured to emit light having a plurality of planes of polarization and the display panel is configured to have a predetermined polarization axis. The plate includes a repolarization region and a prepolarization region. The repolarization region is configured to diffuse and to depolarize or rotate at least one plane of polarization of the light passing therethrough. The prepolarization region is disposed adjacent to and in contact with the repolarization region. The prepolarization region is configured to be substantially nonabsorbent, to allow passage of light having a plane of polarization that is substantially aligned with the predetermined polarization axis, and to prevent passage of light having a plane of polarization that is not substantially aligned with the predetermined polarization axis. In another embodiment, an interface is provided between the regions.Type: GrantFiled: March 21, 2007Date of Patent: July 29, 2014Assignee: Honeywell International Inc.Inventors: L. S. Lamberth, Jr., Ravindra R. Laddu, Brent D. Larson
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Publication number: 20140204312Abstract: After the LEDs 2 (red LEDs (R), green LEDs (G) and blue LEDs (B), or white LEDs (W)) are mounted on the frame 3, without dicing the frame 3 for dividing the LEDs 2 into pieces, the tie bar is punched off to form an electric circuit. Thus, the RGB three primary color LED light source 1A or the white LED light source 1B that emits light in the state of the frame 3 can be manufactured.Type: ApplicationFiled: March 26, 2014Publication date: July 24, 2014Applicant: Renesas Electronics CorporationInventor: Hiroyuki Isobe
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Patent number: 8786802Abstract: A backlight assembly includes a light source generating light and a first optical member diffusing the light. The first optical member includes a first diffusion member provided on an exit surface of the first optical member, from which the light exits, to diffuse the light. The first diffusion member includes a plurality of edges each having a curved shape and extending between the exit surface and a vertex of the first diffusion member. Accordingly, the light exiting through the exit surface is effectively diffused by the edges of the first diffusion member.Type: GrantFiled: September 12, 2013Date of Patent: July 22, 2014Assignee: Samsung Display Co., Ltd.Inventors: Juhwa Ha, Young-Ran Son, Joonghyun Kim, Min-Young Song, Sang Hoon Lee
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Patent number: 8780295Abstract: A radiation device is disclosed. The device includes a light cavity including a top surface, a bottom surface, and side walls. A light source array including at least one light source is formed on a first side wall. The device also includes a reflective coating formed on at least the bottom surface. The top surface allows light transmission and includes a light conversion layer.Type: GrantFiled: March 28, 2011Date of Patent: July 15, 2014Assignee: TSMC Solid State Lighting Ltd.Inventor: Hao-Yu Yang
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Patent number: 8773616Abstract: An illuminating lens (1) includes a light entrance surface (11), a light exit surface (12), and a bottom surface (13). The light entrance surface (11) has a first light entrance surface (111) and a second light entrance surface (112). The first light entrance surface (111) is a curved surface convex toward the light exit surface (12) and perpendicularly intersecting an optical axis A, and the second light entrance surface (112) extends outwardly from an edge of the first light entrance surface (111) and is connected obliquely to an inner edge of the bottom surface (13).Type: GrantFiled: August 6, 2010Date of Patent: July 8, 2014Assignee: Panasonic CorporationInventors: Tomoko Iiyama, Syunsuke Kimura, Daizaburo Matsuki
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Patent number: 8773612Abstract: A light emitting module (1) comprises a module substrate (2), a light emitting diode string (31), and a sealing member (48). The light emitting diode string (31) includes light emitting diode elements (32) and bonding wires (37) which connect the light emitting diode elements (32). The light emitting diode element (32) has a pair of element electrodes (33, 34) and has a rectangular shape extending in a direction along which the element electrodes (33, 34) are aligned. The sealing member (48) is laminated on the module substrate (2) to seal the light emitting diode string (31). The light emitting diode elements (32) are arranged at intervals in a direction crossing the direction along which the element electrodes (33, 34) are aligned, and the element electrodes (33, 34) with the same polarity are aligned to be adjacent to each other in an arrangement direction of the light emitting diode elements (32) between the light emitting diode elements (32) adjacent to each other.Type: GrantFiled: February 26, 2010Date of Patent: July 8, 2014Assignee: Toshiba Lighting & Technology CorporationInventors: Tomohiro Sanpei, Kiyoshi Otani, Masahiro Izumi, Junya Murata, Akiko Saito, Yumiko Hayashida
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Patent number: 8773615Abstract: In a liquid crystal device, a liquid crystal layer is interposed between first and second substrates. The liquid crystal device includes a light-shielding layer formed in a lattice shape and a condensing lens condensing light incident on the side of the first substrate into the inside of an opening portion of a light-shielding section. In the second substrate, a prism element condensing the light which has been incident from the side of the first substrate and has passed and spread through the condensing lens, the liquid crystal layer, and the opening portion is disposed at a position overlapping the light-shielding layer in a plan view. The prism element includes a groove formed in the second substrate.Type: GrantFiled: March 16, 2012Date of Patent: July 8, 2014Assignee: Seiko Epson CorporationInventor: Norihiko Ozawa