Lcd Backlight Patents (Class 362/97.2)
  • Patent number: 8210730
    Abstract: A light guide plate includes a light introducing portion which is positioned facing a point light source and which confines light, and a light guide plate body which is thinner than a maximum thickness of the light introducing portion and which causes a light exit means to emit the confined light outward. The light introducing portion has an inclined face which is inclined from a portion having the maximum thickness to a surface of the light guide plate body. The inclined face includes a directivity converting pattern for converting a directional characteristic of the light that has entered the light introducing portion. The directivity converting pattern's structure includes a plurality of V-shaped grooves. An inscribed circle of the directivity converting pattern passes through both ends of a light exit window of the point light source.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: July 3, 2012
    Assignee: OMRON Corporation
    Inventors: Gouo Kurata, Kazuhide Hirota
  • Patent number: 8210733
    Abstract: A lighting device for a display device includes a light source and a chassis arranged to cover the light source. The chassis includes a base member made of resin material, and further includes a metallic skeleton frame provided on the base member. Thus, the lighting device for a display device having a simple construction capable of preventing or suppressing beat tones generated on a lamp housing member is provided without increasing the thickness of the device.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: July 3, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Shiyoshi Cho
  • Patent number: 8212967
    Abstract: A backlight unit includes a cover bottom having a plurality of light source groups each with a plurality of light sources thereon, wherein the light sources with the higher brightness are arranged in the light source group closer to a center portion of the cover bottom, and the light sources with the lower brightness are arranged in the light source group closer to a periphery of the cover bottom.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: July 3, 2012
    Assignee: LG Display Co., Ltd
    Inventors: Hee Jeong Park, Sang Hyun Ahn
  • Patent number: 8212961
    Abstract: A first printed circuit board is disposed on a first side of the cover. A second printed circuit board is disposed on a second side of the cover. A first connector and a second connector are disposed on the first and second printed circuit boards, respectively. A through hole is formed in a region of the cover that corresponds to the first connector. The first and second connectors are electrically connected to each other through the through hole.
    Type: Grant
    Filed: December 31, 2007
    Date of Patent: July 3, 2012
    Assignee: LG Display Co., Ltd.
    Inventor: Byoung Chul Kim
  • Publication number: 20120154691
    Abstract: A backlight unit includes hot cathode tubes; a chassis 14 housing the hot cathode tube therein and from which light from the hot cathode tube exits; a diffuser plate; and a reflection sheet 20 facing the diffuser plate in the chassis 14. The hot cathode tubes include at least a first hot cathode tube relatively close to the diffuser plate and a second hot cathode tube relatively far from the diffuser plate. A distance between the first hot cathode tube and the diffuser plate is different from a distance between the second hot cathode tube and the diffuser plate. The backlight unit further includes a directional reflection surface provided on a portion of the reflection member that does not overlap at least the second hot cathode tube, and the directional reflection surface faces toward a portion of the diffuser plate overlapping with the second hot cathode tube.
    Type: Application
    Filed: June 25, 2010
    Publication date: June 21, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Shiyoshi Cho
  • Patent number: 8201958
    Abstract: To provide a backlight assembly for a liquid crystal panel, which aims to establish electrical connection between a fluorescent tube (CCFL tube) and an inverter substrate and which is low in cost and improved in assembling operability. A connector 10a includes a contact 2 and a housing 1 holding the contact 2. The contact 2 includes a holding portion held by the housing 1, a first connecting portion 18 connected to a connecting portion 51 of the fluorescent tube, and a second connecting portion 19 connected to the substrate. The first connecting portion 18 is formed from one end of the holding portion through a floating portion. The second connecting portion 19 is formed from the other end of the holding portion.
    Type: Grant
    Filed: June 19, 2008
    Date of Patent: June 19, 2012
    Assignee: Japan Aviation Electronics Industry, Limited
    Inventor: Takeharu Naito
  • Patent number: 8203665
    Abstract: A backlight unit as embodied includes a plurality of unit groups, each unit group having a plurality of light emitting diodes (LEDs); and a light mixing layer formed over the unit groups, for mixing lights emitted from the LEDs to provide substantially white light.
    Type: Grant
    Filed: June 28, 2006
    Date of Patent: June 19, 2012
    Assignee: LG Display Co., Ltd.
    Inventor: Jong-Hyun Choi
  • Patent number: 8201982
    Abstract: A planar illumination device is provided with a plurality of light guide paths, on which scanned light in different scanning sections of a scanning range by a scanning unit is respectively incident, and an illumination unit having a plurality of emission regions for emitting the light guided by the respective light guide paths. The number of the emission regions is 2 or more and 1000 or less, and the respective emission regions successively become luminous as the scanned light is incident on the respective light guide paths.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: June 19, 2012
    Assignee: Panasonic Corporation
    Inventors: Takayuki Nagata, Kazuhisa Yamamoto, Tatsuo Itoh
  • Patent number: 8199281
    Abstract: In a backlight of a liquid crystal display device, the screen of a liquid crystal panel is divided into a plurality of rectangular regions, an edge-light type light guide plate is provided corresponding to each of the rectangular regions, and a plurality of LEDs are provided on the end face of each edge-light type light guide plate. The brightness of the image displayed on each of the rectangular regions is obtained based on an image signal, and, based on the brightness, the brightness of the plurality of LEDs corresponding to each of the rectangular regions is controlled. Accordingly, the power consumption can be reduced as compared with the case where the entire liquid crystal panel is illuminated with uniform brightness. Furthermore, the edge-light type light guide plate is used to allow a decrease in number of the LEDs and the wiring arrangements.
    Type: Grant
    Filed: August 21, 2009
    Date of Patent: June 12, 2012
    Assignee: Funai Electric Co., Ltd.
    Inventor: Takayuki Tsujii
  • Patent number: 8197114
    Abstract: A chassis for an illuminating unit, and an illuminating unit, a display device and a television receiver incorporating the chassis are provided, in which optical sheets are supported in a state where their own weight and an external force are not concentrated at a certain portion thereof, preventing occurrence of wrinkles or deformed portions and falling-off of the optical sheets. A backlight chassis includes stand walls on the sides thereof on which optical sheets are to be placed, and locking pieces protruding from the stand wall on at least one of the sides, the side being a lower side in a normal state in use, and the locking pieces being arranged to lock a lower side of the optical sheets.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: June 12, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yoshiki Takata
  • Publication number: 20120140447
    Abstract: A backlight unit includes light emitting diodes (LED's) and light guide plate which guides light from the light emitting diodes to liquid crystal panel and is constructed so that light is emitted from light emission plane of light guide plate opposite to liquid crystal panel toward liquid crystal panel. Area of light emission plane of light guide plate is smaller than effective display area of liquid crystal panel and predetermined shape for diffusing or dispersing light is formed on a lateral side perpendicular to light emission plane of light guide plate and/or at an edge portion near the lateral side of the light emission plane.
    Type: Application
    Filed: November 22, 2011
    Publication date: June 7, 2012
    Inventors: Shoji Yamamoto, Satoshi Ouchi
  • Publication number: 20120140448
    Abstract: A backlight device includes light emitting diodes (LED's) and a plate-like light guide plate which guides light from the light emitting diodes to a liquid crystal panel. Grooves are disposed on the back of the light guide plate and the light emitting diodes are disposed in the grooves. The light emitting diodes disposed in the grooves are arranged so that light emission direction thereof is parallel with light emission plane of the light guide plate. First optical pattern is disposed on first side opposite to light emission plane of light emitting diodes and second optical pattern is disposed on second side opposite to the back of light emitting diodes. The optical patterns are formed into minute prism array or lens array, for example.
    Type: Application
    Filed: November 16, 2011
    Publication date: June 7, 2012
    Inventors: Mayumi NAGAYOSHI, Satoshi Ohuchi, Hajime Inoue, Hidenao Kubota
  • Patent number: 8194027
    Abstract: A liquid crystal device is provided. The liquid crystal device includes: a liquid crystal panel including a pair of substrates which interpose a liquid crystal layer; a plurality of light receiving elements which detect ambient light; and a control unit which controls a display state of an image displayed on the liquid crystal panel based on an intensity of the ambient light detected by a plurality of the light receiving elements, wherein the control unit includes a determination unit determining that the intensity of the ambient light is changed when changed amounts of the intensities of the ambient light detected by equal to or more than half of the light receiving elements exceed a predetermined value.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: June 5, 2012
    Assignee: Sony Corporation
    Inventors: Shin Fujita, Yutaka Kobashi, Shin Koide, Tomoyuki Ito
  • Publication number: 20120134139
    Abstract: A backlight unit and a display apparatus using the same are disclosed. The backlight unit includes a first reflector, a second reflector partially having an inclined surface, a plurality of light sources disposed between the first reflector and the second reflector, and a third reflector disposed between adjacent light sources.
    Type: Application
    Filed: June 10, 2011
    Publication date: May 31, 2012
    Inventors: Ji Won Jang, Sung Yong Park, Se Jin Ko, Sung Ho Kim
  • Patent number: 8186841
    Abstract: A fluorescent tube is prevented from being wrongly attached and broken when being attached, and luminance nonuniformity of backlight due to luminance difference generated in a tube axis direction of the fluorescent tube is reduced. A backlight device 2 is provided with a plurality of fluorescent tubes 21 having electrodes 211 at both ends; a bundling member 213 for bundling wirings 212 pulled out from the electrode 211 on one side of two or more of the fluorescent tubes 21; and a conducting means 31 for achieving conduction between the electrodes of the two fluorescent tubes among the fluorescent tubes 21 by being connected with the bundling member 213. The conducting means 31 permits a current to be carried between the electrodes of the two fluorescent tubes 21, which are bundled by the one bundling member 213, and the conducting means are arranged on inverter circuit substrate 28, respectively, not to be adjacent to each other.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: May 29, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masahiro Arai, Kohei Nanbu, Masaki Shimizu
  • Patent number: 8186889
    Abstract: Disclosed is an information processing device with lighting function that realizes reduced power consumption and cost reductions. The optical connecting member 17 flexibly connects between a light guide plate 14 of a displaying part side and a light guide plate 21 of a key operating part side, thereby guiding light emitted from a white light LED 13 of a displaying part side to key operating part side.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: May 29, 2012
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Hiroshi Masuda, Atsushi Takahashi, Yasushi Sugimoto, Tomoaki Shibata
  • Publication number: 20120127698
    Abstract: Disclosed is a condensing type optical sheet for use in a liquid crystal display, which prevents the generation of a yellow band or a rainbow phenomenon without using a protective sheet.
    Type: Application
    Filed: July 28, 2010
    Publication date: May 24, 2012
    Applicant: KOLON INDUSTRIES, INC.
    Inventors: Hyun Soo Lee, Chang Pyo Hong, Chung Seock Kang
  • Publication number: 20120127398
    Abstract: A backlight system includes: a light-emitting section (1) having a plurality of light sources that emit beams of light at different dominant wavelengths from one another; and an imaging optical system (3) including a plurality of microlenses (3a) that focus beams of light emitted from the light-emitting section (1), the backlight system irradiating a liquid crystal panel with beams of light having passed through the imaging optical system (3), the liquid crystal panel including a plurality of pixels arrayed at a predetermined pitch from each other, on the assumption that the pitch at which the pixels are arrayed is denoted as P and the imaging optical system (3) has an imaging magnification of (1/n), the light sources (1) being arrayed at a pitch (P1) given as P1=n×P, the microlenses (3a) being arrayed at a pitch (P2) given as P2=(n/(n+1))×P.
    Type: Application
    Filed: June 2, 2010
    Publication date: May 24, 2012
    Applicants: TOHOKU UNIVERSITY, SHARP KABUSHIKI KAISHA
    Inventors: Tatsuo Uchida, Yoshito Suzuki, Tohru Kawakami, Kazuo Sekiya, Masahiro Nishizawa, Takahiro Ishinabe, Baku Katagiri, Yoshihiro Hashimoto, Shoichi Ishihara, Shuichi Kozaki, Yutaka Ishii
  • Publication number: 20120127697
    Abstract: An optical sheet includes a light-passing base sheet, a plurality of light-passing first patterns formed on a front major surface of the base sheet, and a plurality of light-passing second patterns formed on a rear major surface of the base sheet. The first patterns protrude from the front surface of the base sheet, a top portion of each of the second patterns makes contact with the rear surface of the second patterns while a larger lower surface of each of the second patterns is exposed to serve as a light receiving surface. Voids having relatively low refractive indices are formed between the light-passing second patterns. The optical sheet employs just one base sheet in one embodiment, thereby reducing a manufacturing cost of the optical sheet.
    Type: Application
    Filed: July 11, 2011
    Publication date: May 24, 2012
    Inventors: Seung-Mo KIM, Jinsung Choi, Donghoon Kim, Seunghwan Chung
  • Patent number: 8182106
    Abstract: There is provided a surface light source using white light emitting diodes including: a plurality of white light emitting diodes arranged at a predetermined distance from one another, wherein the white light emitting diodes are arranged such that a light emitting diode unit defined by each of the white light emitting diodes and corresponding ones of the white light emitting diodes disposed at a closest distance from the each white light emitting diode has a central light amount ranging from 80% to 120% with respect to an average light amount of the white light emitting diodes.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: May 22, 2012
    Assignee: Samsung LED Co., Ltd
    Inventors: Jae Hong Shin, Hun Joo Hahm, Hyung Suk Kim, Chang Ho Shin, Dae Yeon Kim, Chul Hee Yoo, Dong Hyun Cho
  • Patent number: 8182129
    Abstract: A light guide unit including a light guide plate and a plurality of rod lenses is provided. The light guide plate has a first surface, a second surface opposite to the first surface, and a light incident surface connecting the first surface and the second surface. The light guide plate further has a plurality of diffusion net points located at the second surface. The rod lenses are disposed on the first surface. Each of the rod lenses extends along a first direction and has a curved surface curving in a second direction. The rod lenses are arranged along the second direction. Pitches of the adjacent diffusion net points in the first direction are smaller than pitches of the adjacent diffusion net points in the second direction. A backlight module using the light guide unit is also provided.
    Type: Grant
    Filed: June 8, 2009
    Date of Patent: May 22, 2012
    Assignee: Coretronic Corporation
    Inventors: Tun-Chien Teng, Jyh-Ming Chen
  • Patent number: 8184240
    Abstract: Light source lamps can be held at different intervals by a single kind of lamp clip. A straight tube light source lamp (3) arranged on the surface of a backlight chassis (1) is held by a lamp clip (20) fixed to the backlight chassis (1). The lamp clip (20) comprises a base (21) placed on the surface of the backlight chassis (1), lamp grippers (22) formed on the opposite sides of the base (21), and a fixing piece (23). A plurality of lamp grippers (22) are formed on both sides of the base (21) at respective intervals different from each other. A fixing hole (10) engaging with the fixing piece (23) on the surface of the lamp clip (20) not pertaining to lamp holding, and an escape hole (11) for passing the lamp gripper (22) on that surface are formed in the backlight chassis (1).
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: May 22, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Mitsuhiro Takeba
  • Patent number: 8182105
    Abstract: An optical member, a light source device, and a display device, which can prevent or reduce luminance irregularity on the screen of a display panel, include a sheet or plate shaped optical member located between the display panel which displays an image and a plurality of light sources including a region provided in an area corresponding to an area in which the arrangement intervals between the light sources are wider (an end portion of the screen of the display panel) and has light reflectance higher than light reflectance in a region provided in an area in which the arrangement intervals between the light sources are narrower (a center portion of the screen of the display panel).
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: May 22, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yasumori Kuromizu
  • Patent number: 8183786
    Abstract: A liquid crystal display (“LCD”) includes; a liquid crystal panel which displays an image, and a plurality of light-emitting blocks which provide light to the liquid crystal panel, wherein each of the light-emitting blocks includes a first string having a plurality of first light-emitting elements connected in series and a second string having a plurality of second light-emitting elements connected in series, and an amount of light emitted by each of the first light-emitting elements is different from an amount of light emitted by each of the second light-emitting elements.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: May 22, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Se-Ki Park, Byoung-Dae Ye, Gi-Cheri Kim, Dong-Min Yeo
  • Publication number: 20120120325
    Abstract: In a support pin (11) for supporting optical members (43 to 45) through which light from a LED (24) passes, the portion of a top (14), which is in contact with a diffusion plate (43), is formed of a light reflective material, and the portion of a column (12), which supports the top (14), is formed of a light transmissive material.
    Type: Application
    Filed: March 24, 2010
    Publication date: May 17, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Takaharu Shimizu
  • Patent number: 8177379
    Abstract: A backlight module, a liquid crystal display using the backlight module, and a manufacturing method thereof are provided. The backlight module includes a bottom plate, a plurality of light source sets and at least one partition wall. A plurality of lighting areas is formed on the bottom plate and light source sets are disposed on the lighting areas, respectively. The partition wall is disposed on the bottom plate and between each two adjacent lighting areas to fully or partially block/reflect the light emitted from the lighting areas. The partition wall includes a first light-penetrable wall and a light reflective layer formed on a wall surface of first light-penetrable wall. The light reflective layer is erected on the bottom plate through the support provided by the first light-penetrable wall and its wall surface.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: May 15, 2012
    Assignee: Au Optronics Corporation
    Inventors: Ci-Guang Peng, Shin-Chin Tseng, Chih-Kuang Chen, Chung Peng
  • Patent number: 8177378
    Abstract: A light emitting apparatus is provided which includes a plurality of light sources for emitting a light, and a light guide plate having a substantially plate shape orthogonal to the optical axis direction of the light source, which includes a light incident face into which a light exited from the light source is incident and a light exit face from which the light incident from the light incident face is exited. Irregularities each made of a first slope forming an angle ?a with the plane of the light incident face and a second slope forming an angle ?b with the plane of the light incident face are continuously formed on the light incident face.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: May 15, 2012
    Assignee: Sony Corporation
    Inventor: Shingo Ohkawa
  • Patent number: 8172445
    Abstract: A backlight module can be used in a dual display module and capable of blurring the shadow image produced by the sub display window in the main display window, while the main display window is displaying images, is disclosed. The disclosed backlight module comprises: a light emitting unit, a first frame located on one side of the light emitting unit and a first display window is enclosed by the first frame, a second frame located on the other side of the light emitting unit opposing to the first frame and a second display window is enclosed by the second frame, and a light diffusing plate, wherein the display area of the second display window is larger than the display area of the first display window. Besides, the light diffusing plate has a smooth surface and a rough surface respectively, while the rough surface is facing the light emitting unit.
    Type: Grant
    Filed: July 10, 2009
    Date of Patent: May 8, 2012
    Assignee: Chimei Innolux Corporation
    Inventors: Ming-Cheng Tai, Yi-Hui Chang, Li-Chiao Huang
  • Patent number: 8174640
    Abstract: An illumination apparatus is disclosed. The illumination apparatus includes a polarization plate, a light source, and a light transmission film disposed between the polarization plate and the light source and including a plurality of prisms formed on a surface thereof. The plurality of prisms each have a ridge line in a first direction and are continuously arranged in a second direction perpendicular to the first direction. The light transmission film is disposed such that a ridge line direction of the plurality of prisms is one of a perpendicular direction and an approximately perpendicular direction to a transmission axis of the polarization plate. The plurality of prisms each have refractive indexes in the ridge line direction, an arrangement direction, and a thickness direction, the refractive index in the ridge line direction being larger than the refractive indexes in the arrangement direction and thickness direction.
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: May 8, 2012
    Assignee: Sony Corporation
    Inventor: Mitsunari Hoshi
  • Publication number: 20120105770
    Abstract: A backlight module is provided and the backlight module comprises a back plate, a frame, a light source, and a diffusion plate, wherein the diffusion plate is connected with and fixed to the frame or the back plate by hold structures that impose a tension effect on the diffusion plate. Also, a liquid crystal display device comprising the backlight module is provided.
    Type: Application
    Filed: November 1, 2011
    Publication date: May 3, 2012
    Applicant: BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Ping Sun, Laiyou Cui, Fang Kang
  • Publication number: 20120105737
    Abstract: The present invention aims at providing a lighting device configured to suppress uneven brightness, and a display device or a television receiver which includes the lighting device. The lighting device of the present invention includes a plurality of LEDs 16, an LED board 17S, a chassis 14, a connecting component 60, and a reflection sheet 21. The LEDs 16 are mounted on the LED board 175. Both of the LED boards 17S and 17C are attached to the chassis 14. The connecting component 60 electrically connect the LED boards 17S and 17C to each other. The reflection sheet 21 is overlaid on light source mounted surfaces 17A. In the lighting device, the connecting component 60 is arranged on a connecting component attached surface 17B of the LED board 17S. The connecting component attached surface 17B is opposite to the surface on which the reflection sheet 21 is overlaid.
    Type: Application
    Filed: June 15, 2010
    Publication date: May 3, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Yasumori Kuromizu
  • Patent number: 8169563
    Abstract: A backlight assembly includes a light source, a light-guide plate, a mold frame and a bottom chassis. The mold frame includes a first bottom portion, a protrusion on a first surface of the first bottom portion and a first sidewall portion on a second surface of the first bottom portion opposite to the first surface of the first bottom portion and facing the light guide plate. The bottom chassis includes a second bottom portion having a hole to receive the protrusion of the first bottom portion, and a second sidewall portion facing the light guide plate. A cross sectional area of a first opening of the hole corresponding to an inner surface of the bottom chassis and contacting the first surface of mold frame is different than a cross sectional area of a second opening of the hole corresponding to an outer surface of the bottom chassis.
    Type: Grant
    Filed: May 19, 2008
    Date of Patent: May 1, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Joon-ik Lee, Sang-hee Lee, Jeong-seok Oh, Sang-min Yi, Jae-lok Cha, Ji-Hwan Jang
  • Publication number: 20120099295
    Abstract: It is an object of the present invention to provide a lighting device realizing cost reduction. A lighting device of the present invention includes a plurality of LEDs 16, an LED board 40 on which the LEDs 16 are mounted, and a chassis 14 to which the LED board 40 is attached. The LED board 40 has a rectangular frame-shape. The LED board 40 includes a first board 40A1 and a second board 40A2 attached to the chassis 14. The second board 40A2 having an outer shape smaller than that of the first board 40A1 may be provided inside the first board 40A1 in a plan view.
    Type: Application
    Filed: June 15, 2010
    Publication date: April 26, 2012
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Masashi Yokota
  • Patent number: 8164564
    Abstract: A liquid crystal display and control method thereof, having a liquid crystal display panel, a light emitting diode device which is disposed on the rear of the liquid crystal display panel and which is divided into a plurality of partitioned areas that are capable of being driven independently, a light guide part disposed for each of the partitioned areas, an image calculating part for dividing the liquid crystal display panel into a plurality of regions and calculating the brightness of each region by using image data, and an inverter and an inverter controller to provide differentiated power to the partitioned areas based on the calculated brightness.
    Type: Grant
    Filed: September 1, 2006
    Date of Patent: April 24, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Su-gun Kim, Tae-hee Cho, Ki-bum Seong, Il-yong Jung, Kye-hoon Lee, Jun-young Lee, Jung-hyeon Kim
  • Publication number: 20120092592
    Abstract: 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: Application
    Filed: October 18, 2011
    Publication date: April 19, 2012
    Applicant: PANASONIC LIQUID CRYSTAL DISPLAY CO., LTD.
    Inventors: Ikuko IMAJO, Sachiko YAMAZAKI, Kikuo ONO
  • Patent number: 8159450
    Abstract: In the case where a screen divided display is performed on a liquid crystal panel, a change in brightness or chromaticity between sub regions divided may be reduced. A display includes: a display panel; a backlight arranged corresponding to each of sub regions, and selectively illuminating the corresponding sub region, the sub regions being defined by dividing a display region of the display panel into a plurality of parts; a monitoring means for monitoring the light emission state of the backlight corresponding to each of the sub regions; and a display control means for determining a sub region on which an image is to be displayed, on the basis of the monitoring result of the monitoring means, to fit the image into the determined sub region, and controlling a backlight corresponding to the determined sub region to emit light.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: April 17, 2012
    Assignee: Sony Corporation
    Inventor: Hiroshi Doi
  • Patent number: 8159453
    Abstract: A display device having backlight and the backlight control method thereof is provided. Through the provided method, it is capable of fast determining which intensity range the intensity signal from the means for measuring the intensity of external light falls in, so that the turn-off period of backlight is reduced to avoid the decrement of brightness.
    Type: Grant
    Filed: May 11, 2009
    Date of Patent: April 17, 2012
    Assignee: Chimei Innolux Corporation
    Inventor: Yoshikazu Matsui
  • Patent number: 8157399
    Abstract: A control unit including a keypad having a plurality control indicators, a light producing device configured to illuminate the control indicators, and a light blocking device disposed between the control indicators and the light producing device and configured to selectively restrict or transmit light from the light producing device to the control indicators.
    Type: Grant
    Filed: October 3, 2008
    Date of Patent: April 17, 2012
    Assignee: General Electric Company
    Inventor: Tony Leung
  • Publication number: 20120086883
    Abstract: A backlight unit includes alight guide plate, an inner frame that surrounds an outer periphery of the light guide plate, and an outer frame that surrounds an outer periphery of the inner frame. An inner periphery of the inner frame is formed with an inner protrusion that projects toward the outer periphery of the light guide plate. The outer periphery of the inner frame is formed with an outer protrusion that projects toward an inner periphery of the outer frame. The inner protrusion and the outer protrusion are located on opposite sides of a wall part that is one side part of the inner frame, and arranged at a distance from each other in a longitudinal direction of the wall part of the inner frame. According to the backlight unit, relative positional displacement of members can be suppressed while ensuring the ease of assembling.
    Type: Application
    Filed: October 6, 2011
    Publication date: April 12, 2012
    Inventors: Shoichi WAKITA, Nobuyuki SUZUKI
  • Patent number: 8154685
    Abstract: A laser light source (1) emits a beam. A collimator lens (2) converts the beam emitted from the laser light source (1) into first substantially parallel light. A lenticular lens (3) expands a beam of the first substantially parallel light converted by the collimator lens (2) into a linear shape in a first direction. A Fresnel lens (4) converts the beam expanded in the first direction by the lenticular lens (3) into second substantially parallel light. A free curved surface mirror (5) has a reflecting surface formed into a free curved surface, and expands a beam of the second substantially parallel light converted by the Fresnel lens (4) into a planar shape in a second direction orthogonal to the first direction. This arrangement enables to provide a planar illumination device with a small thickness and high light use efficiency.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: April 10, 2012
    Assignee: Panasonic Corporation
    Inventors: Kenji Nakayama, Shinichi Shikii, Kazuhisa Yamamoto, Takayuki Nagata
  • Patent number: 8154686
    Abstract: A directional backlight, a multiple view display and a multi-direction display A multiple view display (18) comprises a directional display device (19) for displaying a first image or sequence of images so as to be mainly visible from a first range of directions relative to the device and for simultaneously displaying a second image or sequence of images so as to be mainly visible from a second range of directions relative to the device different from the first range. The display (18) further comprises a directional backlight (20) for directing light through the display device (19) at least mainly in the first and second ranges. Since the directional backlight (20) directs light through the display device (19) at least mainly in the first and second ranges, the display provides users located in the first and second ranges with images of greater intensity than a conventional display.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: April 10, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Jonathan Mather, Neil Barratt, Diana U. Kean, Emma J. Walton, Grant Bourhill, Thomas Wynne Powell
  • Patent number: 8152319
    Abstract: A backlight module and a liquid crystal display are disclosed. In the backlight module having a reflector base, a phosphor layer is disposed on the reflector base, and a plurality of blue light emitting diode (LEDs) are disposed above the reflector base and the phosphor layer for emitting a first light beam. An optical film is disposed above the reflector base, the phosphor layer and the blue LEDs for allowing P-polarized light of the first light beam to pass therethrough and reflecting S-polarized light of the first light beam to the phosphor layer so as to excite the phosphor layer to generate a second light beam of which the wavelengths are different from those of the first light beam. After being reflected to the optical film by the reflector base, the second light beam transmits through the optical film, and mixes with the first light beam to generate white light.
    Type: Grant
    Filed: May 29, 2009
    Date of Patent: April 10, 2012
    Assignee: Au Optronics Corporation
    Inventors: Chun-Liang Lin, Ya-Ling Hsu, Ying-Li Wang, Chun-Chieh Wang, Chen-Hsien Liao
  • Publication number: 20120081406
    Abstract: This disclosure provides systems, methods and apparatus, including reflective display elements that are illuminated using a light source that is situated behind the pixel elements. In one aspect, a back light guide is disposed behind the pixel elements and is configured to inject light through light-injection apertures between reflective pixel elements. The light travels through the light-injection apertures and into a front light guide. The front light guide comprises light turning features configured to turn the light propagating through the light-injection apertures so that the light is redirected onto the reflective pixel elements, thereby illuminating the reflective pixel elements.
    Type: Application
    Filed: September 30, 2010
    Publication date: April 5, 2012
    Applicant: QUALCOMM MEMS Technologies, Inc.
    Inventors: Kebin Li, Ming-Hau Tung, Evgeni P. Gousev
  • Patent number: 8147115
    Abstract: An electro-optical device includes an electro-optical panel, a lighting unit that is disposed to overlap with the electro-optical panel in a plan view and that irradiates the electro-optical panel, and a frame-shaped holding member that has an adhesive layer for holding the electro-optical panel and the lighting unit. The holding member is provided at an outer peripheral end surface of the electro-optical panel and an outer peripheral end surface of the lighting unit, and fixes the electro-optical panel and the lighting unit.
    Type: Grant
    Filed: July 9, 2009
    Date of Patent: April 3, 2012
    Assignee: Sony Corporation
    Inventor: Kanechika Kiyose
  • Patent number: 8149352
    Abstract: A backlight unit which prevents an initial driving malfunction is disclosed. The backlight unit includes: a bottom cover opened upwardly; a reflective sheet disposed in the inner surface of the bottom cover; a plurality of lamps arranged in a fixed interval on the reflective sheet; a driver disposed on the rear surface of the bottom cover; an auxiliary light source loaded on the driver; a first hole formed in a region of the bottom cover opposite to the auxiliary light source; and a hole region, on the reflective sheet, including one of plural micro-penetration holes and plural slit holes and opposite the first hole on the reflective sheet.
    Type: Grant
    Filed: October 27, 2009
    Date of Patent: April 3, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Ki Duck Park, Hyun Woo Kim
  • Patent number: 8144113
    Abstract: Disclosed herein is a liquid crystal display capable of reducing a side effect during local LED dimming to reduce power consumption and improve display quality.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: March 27, 2012
    Assignee: LG Display Co., Ltd.
    Inventors: Joon Kyu Park, Jong Hoon Kim
  • Patent number: 8142041
    Abstract: A backlight module can comprise: a backlight source, a diffuser plate adjacent the backlight source, and a lenticular film having a convex lenticular feature on a viewing side, wherein the diffuser plate is located between the lenticular film and the backlight source.
    Type: Grant
    Filed: August 27, 2009
    Date of Patent: March 27, 2012
    Assignee: Sabic Innovative Plastics IP B.V.
    Inventors: Weijun Liao, Philip M. Peters
  • Patent number: 8142040
    Abstract: A fixing mechanism of backlight component includes a metal bezel, a socket, a lamp sheathing structure, and an external frame. A fixing hole is formed on the metal bezel. A fixing structure is formed on an end of the socket for inserting into the fixing hole of the metal bezel to electrically connect to a power control circuit board. A groove is formed on the other end of the socket for containing a lamp. The lamp sheathing structure is disposed on the metal bezel for sheathing the lamp so as to fix the lamp with the socket together. The external frame is disposed on the metal bezel and abuts against the lamp sheathing structure to fix the lamp sheathing structure on the metal bezel.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: March 27, 2012
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Sheng-Chieh Chao, Cheng-Sheng Chiang
  • Publication number: 20120069263
    Abstract: A liquid crystal display is provided. The liquid crystal display includes a liquid crystal panel, a light guide plate disposed below the liquid crystal panel, and a light source unit which emits light to at least one side surface of the light guide plate. The light source unit includes light source elements which are disposed adjacent to the at least one side surface of the light guide plate, and which emit light that is incident on the at least one side surface of the light guide plate. A printed circuit board is disposed adjacent to a lower surface of the light guide plate and supports the light source elements.
    Type: Application
    Filed: September 2, 2011
    Publication date: March 22, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Gil Tae HUR, Kun Ho CHO, Yong Hun KWON, Kye Hoon LEE, Suk Ju CHOI
  • Publication number: 20120069533
    Abstract: A casing for an electronic device includes a casing body that is transparent at least in part and that defines at least one chamber, a receptacle to communicate fluidly with the chamber and containing at least one liquid body having a predetermined color, and a control module connected to the receptacle and being operable to permit flow of the liquid body from the receptacle to the chamber.
    Type: Application
    Filed: February 9, 2011
    Publication date: March 22, 2012
    Applicant: HANNSPREE, INC.
    Inventors: Guan-De LIOU, Stephen TSAI, Li-Li LAI, Shao-Yu HWANG