Specifically For Guiding Light In A Front-lit Device Patents (Class 349/63)
-
Patent number: 8111354Abstract: A backlight unit having a LED light source includes a light guide plate partitioned in areas each having a tapered shape formed of a thick portion and a thin portion. The light guide plate is formed such that a thick portion and a thin portion are repeated at certain intervals, and the repeated thick portions and the repeated thin portions gradually decrease in thickness. The LED light source is attached to a lateral side of each thick portion. Grooves are formed in the light irradiation direction of the LED light source and in a direction perpendicularly intersecting the light irradiation direction. Each of the grooves is formed in an concave shape (V-shape or trapezoid-shape). There is a relation 0.2/30<=W/D<0.1 where D denotes the distance between the light guide plate and a light diffusion plate, and W denotes the width of each of the grooves. An inclination angle ? relative to the center of each of the grooves is between 9 and 15 degrees inclusive.Type: GrantFiled: January 8, 2010Date of Patent: February 7, 2012Assignee: Hitachi Consumer Electronics Co., Ltd.Inventors: Satoshi Ouchi, Koichi Sakita, Hajime Inoue, Seiji Murata
-
Patent number: 8102484Abstract: A light emitting device includes a transparent conductive layer formed adjacent one of two semiconductor layers having an active layer therebetween. The transparent conductive layer includes first and second transparent conductive regions with different electrical conductivities. The difference in electrical conductivities controls an amount or flow rate of current into the semiconductor layer adjacent the transparent conductive layer, and an electrode is at least partial aligned with the second transparent conductive region.Type: GrantFiled: December 21, 2010Date of Patent: January 24, 2012Assignee: LG Innotek Co., Ltd.Inventors: Sang Youl Lee, So Jung Kim, June O Song, Kwang Ki Choi
-
Patent number: 8094260Abstract: A liquid crystal display (LCD) including an LCD panel and a back light module is provided. The back light module is disposed below the LCD panel. The back light module includes a planar light source, a reflective polarized light enhancement film, a first prism film and a ?/4 phase retardation film. The planar light source is disposed below the LCD panel, while the reflective polarized light enhancement film is disposed between the LCD panel and the planar light source. The first prism film is disposed between the reflective polarized light enhancement film and the planar light source. Besides, the ?/4 phase retardation film is disposed between the reflective polarized light enhancement film and the first prism film. The back light module has a relatively high light utilization rate, and the LCD has favorable display luminance.Type: GrantFiled: December 17, 2008Date of Patent: January 10, 2012Assignee: Wintek CorporationInventors: Yi-Chun Wu, Chien-Chung Lee, Chun-Chi Chi, Chung-Hui Hu, Yu-Chen Liu, Tzung-Fu Lai, Ya-Ling Hsu, Zi-Chi Ye, Chong-Yang Fang, Ping-Yeng Chen, Kuo-Chang Su, Yu-Chen Ting
-
Patent number: 8085361Abstract: A liquid crystal module includes a rear frame, a light reflecting sheet, a plurality of U-shaped cold cathode tubes, an optical sheet and a liquid crystal panel. The light reflecting sheet is disposed on the rear frame. The U-shaped cold cathode tubes are disposed above the light reflecting sheet and arranged parallel to each other. Each of the U-shaped cold cathode tubes includes a U-shaped bent part and a pair of end portions extending from the U-shaped bent part. Widths of the U-shaped bent parts of the U-shaped cold cathode tubes are different from each other. Overall lengths of the U-shaped cold cathode tubes from one end portions to the other end portions along the U-shaped cold cathode tubes are equal to each other. The optical sheet is disposed above the U-shaped cold cathode tube. The liquid crystal panel is disposed above the optical sheet.Type: GrantFiled: December 29, 2008Date of Patent: December 27, 2011Assignee: Funai Electric Co., Ltd.Inventor: Tatsuji Sudo
-
Publication number: 20110292320Abstract: Disclosed herein are a backlight unit and a display device. The backlight unit includes a bottom cover, a light emitting device module disposed at the lower portion of the inside of the bottom cover, a light guide plate disposed adjacent to the light emitting device module and disposed in front of the bottom cover, at least one optical sheet and a reflective sheet disposed adjacent to the light guide plate, recesses, each of which is disposed with one opened side, disposed at the edges of at least one of the light guide plate, the reflective sheet and the at least one optical sheet, and protrusions disposed at one side of the bottom cover disposed with the light emitting device module so as to be inserted into the recesses of the at least one of the light guide plate, the reflective sheet and the at least one optical sheet.Type: ApplicationFiled: May 24, 2011Publication date: December 1, 2011Inventors: Dong Kug YU, Sung Yong Park, Young Bae Jang
-
Patent number: 8054414Abstract: A liquid crystal display (LCD) device including upper and lower substrates facing each other with a liquid crystal layer interposed therebetween, upper and lower polarization plates positioned on outer surfaces of the upper and lower substrates, respectively, and a beam steering film positioned on the upper polarization plate and including a plurality of curved-lenses formed on a surface of the beam steering film facing the upper polarization plate.Type: GrantFiled: December 21, 2006Date of Patent: November 8, 2011Assignee: LG Display Co., Ltd.Inventors: Chi Hyuck Park, Seung Hee Lee
-
Patent number: 8049838Abstract: A direct light type backlight unit and a color filterless liquid crystal display (LCD) apparatus employing the same are provided. The direct light type backlight unit includes: a substrate; a plurality of light-emitting devices inclined with respect to the substrate; a diffraction grating which diffracts light emitted by the plurality of light-emitting devices at different angles according to wavelength and thereby separates the light into a plurality of color beams; and a plurality of reflectors, each reflector disposed at a side of one of the plurality of light-emitting devices, which reduces the range of angles of light incident on the diffraction grating.Type: GrantFiled: September 26, 2006Date of Patent: November 1, 2011Assignee: Samsung Electronics Co., Ltd.Inventor: Il-yong Jung
-
Patent number: 8045092Abstract: A multifunctional optical sheet for a liquid crystal display device includes a substrate diffusing incident light; a light-concentrating layer on the substrate and including a plurality of patterns that arranged to form alternating peaks and valleys; and reflection patterns between the substrate and the light-concentrating layer corresponding to the valleys of the light concentrating layer.Type: GrantFiled: May 6, 2008Date of Patent: October 25, 2011Assignee: LG Display Co., Ltd.Inventors: Young-Hun Jeong, Hyeuk-Chan Kwon, Man-Hoan Lee
-
Patent number: 8040459Abstract: A backlight (illuminating device) of the present invention is a tandem type backlight including a plurality of light-emitting units (11) including at least one point light source (5) and a light guide plate (7) for causing light from the at least one point light source to be diffused and surface-emitted. In each of the light-emitting units (11), a length X of a light guide area (9) is set so that an area, on a boundary surface between a light-emitting area (10) and the light guide area (9), of a cross-section of a light beam that is emitted from the at least one point light source (5) and is diffused in the light guide plate (7) is equal to or larger than an area of the boundary surface (interface). Moreover, a length X, in a length direction D1, of the light guide area is smaller than a length Y, in the length direction D1, of the light-emitting area, the length direction being a direction pointing from the at least one point light source (5) toward the light-emitting area (10).Type: GrantFiled: July 25, 2008Date of Patent: October 18, 2011Assignee: Sharp Kabushiki KaishaInventors: Yuhsaku Ajichi, Takeshi Masuda
-
Patent number: 8040456Abstract: To sophisticate a portable electronic appliance without hindering reduction of the weight and the size, more specifically, to sophisticate a liquid crystal display apparatus installed in a portable electronic appliance without hindering the mechanical strength, a liquid crystal display apparatus includes a first plastic substrate, a light-emitting device which is disposed over the first plastic substrate, resin which covers the light-emitting device, an insulating film which is in contact with the resin, a semiconductor device which is in contact with the insulating film, a liquid crystal cell which is electrically connected to the semiconductor device, and a second plastic substrate, wherein the semiconductor device and the liquid crystal cell are disposed between the first plastic substrate and the second plastic substrate.Type: GrantFiled: January 14, 2004Date of Patent: October 18, 2011Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Toru Takayama, Junya Maruyama, Yuugo Goto, Yumiko Ohno, Akio Endo, Yasuyuki Arai
-
Patent number: 8040461Abstract: A liquid crystal display, comprising: a liquid crystal display panel and a backlight module. The backlight module comprising: a reflection unit, a light emitting unit, and a compound diffusion plate structure. The light emitting unit has a plurality of light emitting components installed within the installation space of the reflection unit. The compound diffusion plate structure is placed on one side of the light emitting unit, comprising: a body unit and a printing micro diffusion unit. The body unit has a main layer, and a plurality of micro diffusion particles formed inside the body unit, allowing light to diffuse within the body unit. The printing micro diffusion unit has a plurality of convex lens units formed on a light entrance plane or a light exit plane of the body unit by means of printing.Type: GrantFiled: October 13, 2009Date of Patent: October 18, 2011Assignee: Entire Technology Co., Ltd.Inventors: Chao-Ying Lin, Ying Yuan Wu, Chun-Yu Lin, Jen-Huai Chang, Chung Yu Chen
-
Publication number: 20110249219Abstract: 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: ApplicationFiled: April 13, 2010Publication date: October 13, 2011Inventors: Allan EVANS, Stephen Day, Sunay Shah, Patrick Zebedee, Lesley Parry-Jones, Gareth Nicholas
-
Publication number: 20110242457Abstract: 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: ApplicationFiled: October 27, 2010Publication date: October 6, 2011Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chi-Hung Lee, Hui-Hsiung Lin, Po-Chou Chen, Cheng-Huan Chen
-
Publication number: 20110242456Abstract: 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: ApplicationFiled: September 9, 2010Publication date: October 6, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tsuyoshi Hioki, Rieko Fukushima, Takeshi Morino
-
Patent number: 8022615Abstract: 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: GrantFiled: August 14, 2007Date of Patent: September 20, 2011Assignee: Motorola Mobility, Inc.Inventors: XiaoPing Bai, Sen Yang, Wenyong Zhu
-
Patent number: 7986388Abstract: 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: GrantFiled: May 7, 2007Date of Patent: July 26, 2011Assignee: Keiwa Inc.Inventor: Kenichi Harada
-
Publication number: 20110176087Abstract: 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: ApplicationFiled: January 7, 2011Publication date: July 21, 2011Inventor: Dong Wook PARK
-
Patent number: 7982821Abstract: 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: GrantFiled: July 19, 2006Date of Patent: July 19, 2011Assignee: Sharp Kabushiki KaishaInventor: Hisashi Watanabe
-
Patent number: 7978285Abstract: 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: GrantFiled: March 19, 2008Date of Patent: July 12, 2011Assignee: Casio Computer Co., Ltd.Inventor: Yasuhiro Daiku
-
Patent number: 7969405Abstract: 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: GrantFiled: July 20, 2007Date of Patent: June 28, 2011Assignee: International Business Machines CorporationInventor: Derek Kwan
-
Patent number: 7950816Abstract: 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: GrantFiled: June 7, 2010Date of Patent: May 31, 2011Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Koji Moriya, Takeshi Nishi
-
Patent number: 7944524Abstract: 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: GrantFiled: June 1, 2007Date of Patent: May 17, 2011Assignee: Citizen Holdings Co., Ltd.Inventors: Takashi Akiyama, Sachiko Kawada
-
Patent number: 7924368Abstract: 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: GrantFiled: December 8, 2005Date of Patent: April 12, 2011Assignee: 3M Innovative Properties CompanyInventors: Ryan T. Fabick, Stephen J. Etzkorn, Mark D. Gehlsen
-
Publication number: 20110069255Abstract: 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: ApplicationFiled: September 21, 2010Publication date: March 24, 2011Inventors: Sang Joon CHOI, Young Min Kweon, Sang Ryeon Park, Jae Yong Ryu, Sung Sik Son
-
Patent number: 7894012Abstract: 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: GrantFiled: August 25, 2006Date of Patent: February 22, 2011Assignee: Sharp Kabushiki KaishaInventor: Yuhji Takahashi
-
Publication number: 20110037924Abstract: 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: ApplicationFiled: April 29, 2010Publication date: February 17, 2011Applicant: SONY ERICSSON MOBILE COMMUNICATIONS ABInventor: Nobuhiko KIDO
-
Patent number: 7887208Abstract: 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 theType: GrantFiled: September 15, 2006Date of Patent: February 15, 2011Assignee: Zeon CorporationInventor: Keisuke Tsukada
-
Patent number: 7880826Abstract: 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: GrantFiled: May 23, 2008Date of Patent: February 1, 2011Assignee: Beijing Boe Optoelectronics Technology Co., Ltd.Inventors: Jian Guo, Kiyong Kim, Weifeng Zhou, Xing Ming
-
Patent number: 7876397Abstract: 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: GrantFiled: September 23, 2004Date of Patent: January 25, 2011Assignee: Koninklijke Philips Electronics N.V.Inventors: Marcellinus P. C. M. Krijn, Willem L. Ijzerman, Siebe T. De Zwart, Hugo J. Cornelissen
-
Patent number: 7872705Abstract: 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: GrantFiled: July 29, 2007Date of Patent: January 18, 2011Assignee: Cree, Inc.Inventors: Nicholas W. Medendorp, Jr., Norbert Hiller, Russell G. Villard
-
Publication number: 20110007241Abstract: 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: ApplicationFiled: September 10, 2010Publication date: January 13, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Seong-mo HWANG, Dong-ho WEE, Seung-ho NAM
-
Patent number: 7864258Abstract: 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: GrantFiled: January 11, 2007Date of Patent: January 4, 2011Assignee: Samsung Electronics Co., Ltd.Inventors: Jin-hyun Cho, Joon Kang
-
Patent number: 7862179Abstract: 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: GrantFiled: November 7, 2007Date of Patent: January 4, 2011Assignee: OmniVision Technologies, Inc.Inventors: Jizhang Shan, Jin Li
-
Patent number: 7855765Abstract: 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: GrantFiled: September 8, 2008Date of Patent: December 21, 2010Assignees: Hitachi Displays, Ltd., Hitachi Display Devices, Ltd.Inventors: Yoshiaki Takahashi, Masayuki Mifune, Ken Kagabu, Hidehiro Hanada, Nobuyuki Suzuki
-
Patent number: 7855763Abstract: 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: GrantFiled: February 19, 2008Date of Patent: December 21, 2010Assignee: Mitsubishi Electric CorporationInventors: Akimasa Yuuki, Kyoichiro Oda, Naoko Iwasaki, Shin Tahata, Toru Kokogawa
-
Patent number: 7852429Abstract: 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: GrantFiled: November 13, 2008Date of Patent: December 14, 2010Assignee: Hitachi Displays, Ltd.Inventors: Yasuaki Kondo, Tsutomu Sato, Kosuke Matsubara, Toshimitsu Matsudo
-
Patent number: 7852423Abstract: 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: GrantFiled: December 28, 2004Date of Patent: December 14, 2010Assignee: LG Display Co., Ltd.Inventor: Won Yong Park
-
Patent number: 7847880Abstract: 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: GrantFiled: June 14, 2006Date of Patent: December 7, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Joong-Hyun Kim, In-Sun Hwang
-
Patent number: 7847883Abstract: 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: GrantFiled: May 19, 2006Date of Patent: December 7, 2010Assignee: Epson Imaging Devices CorporationInventor: Norio Koma
-
Patent number: 7843527Abstract: 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: GrantFiled: June 30, 2008Date of Patent: November 30, 2010Assignee: TPO Displays Corp.Inventors: Nigel David Young, Steve Battersby
-
Optical member, backlight assembly having the same and liquid crystal display device having the same
Patent number: 7841749Abstract: 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: GrantFiled: April 21, 2006Date of Patent: November 30, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Jin-Soo Kim, Jung-Wook Paek, Byung-Yun Joo, Ju-Hwa Ha, Jin-Sung Choi -
Publication number: 20100283941Abstract: 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: ApplicationFiled: December 12, 2008Publication date: November 11, 2010Inventors: Tadashi Nemoto, Seishi Kosegawa, Naru Usukura, Takehiro Murao, Satoshi Shibata, Takuma Tomotoshi
-
Patent number: 7808475Abstract: 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: GrantFiled: April 12, 2007Date of Patent: October 5, 2010Assignee: Microsoft CorporationInventor: Shawn M. Brown
-
Patent number: 7804555Abstract: 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: GrantFiled: January 18, 2006Date of Patent: September 28, 2010Assignee: LG Display Co., Ltd.Inventors: Sung Ho Kim, Hyun Ha Hwang
-
Patent number: 7804561Abstract: 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: GrantFiled: January 10, 2007Date of Patent: September 28, 2010Assignee: Toppan Printing Co., Ltd.Inventors: Hiroshi Sasaki, Kazunori Yamada, Yusuke Iida, Noriko Asashi
-
Patent number: 7800715Abstract: 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: GrantFiled: July 24, 2008Date of Patent: September 21, 2010Assignee: Casio Computer Co., Ltd.Inventors: Toshiharu Nishino, Norihiro Arai, Kunpei Kobayashi
-
Publication number: 20100231825Abstract: 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: ApplicationFiled: March 8, 2010Publication date: September 16, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Norio KOMA, Kenji TANASE, Yasushi KARASAWA, Tadayoshi IKEHARA
-
Patent number: 7796234Abstract: 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: GrantFiled: April 23, 2007Date of Patent: September 14, 2010Assignee: Sony Ericsson Mobile Communications ABInventors: Mats Kleverman, Gunnar Klinghult, Mats Wernersson
-
Patent number: 7796211Abstract: 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: GrantFiled: September 4, 2007Date of Patent: September 14, 2010Assignee: Chimei Innolux CorporationInventor: Chih-Chia Yu
-
Patent number: 7777833Abstract: 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: GrantFiled: August 24, 2007Date of Patent: August 17, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Seong-mo Hwang, Dong-ho Wee, Seung-ho Nam