Specifically For Guiding Light In A Front-lit Device Patents (Class 349/63)
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Patent number: 8536568Abstract: The invention is directed to a higher contrast in a display device having a lighting device as a front light. A lighting portion is attached to a reflective liquid crystal display portion. A first transparent substrate and a second transparent substrate made of a glass substrate etc. are attached to each other with a sealing layer coated on those peripheral portions therebetween. The back surface of the first transparent substrate is attached to the reflective liquid crystal display portion, and an organic EL element is formed on the front surface of the first transparent substrate. The organic EL element is sealed in a space surrounded by the first transparent substrate, the second transparent substrate, and the sealing layer. The organic EL element is formed in a region corresponding to a pixel region of the reflective liquid crystal display portion. A desiccant layer is formed on the front surface of the second transparent substrate.Type: GrantFiled: August 26, 2008Date of Patent: September 17, 2013Assignees: SANYO Electric Co., Ltd., Epson Imaging Devices CorporationInventors: Kenji Tanase, Kazunobu Mameno, Norio Koma, Manabu Takemoto
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Patent number: 8525950Abstract: A light guide panel, a backlight unit and a display apparatus are provided. A display apparatus includes a light guide panel including a first surface having a first pattern that increases luminance of backlight emitted from a light emitting unit, and a second surface having a second pattern that increases uniformity of luminance of the backlight emitted from the light emitting unit.Type: GrantFiled: June 22, 2010Date of Patent: September 3, 2013Assignee: Samsung Electronics Co., Ltd.Inventor: Il-yong Jung
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Patent number: 8525946Abstract: A backlight unit, light guide panel, and liquid crystal display (LCD) apparatus having the same are provided. The backlight unit includes a light guide panel which comprises a plurality of patterns to scatter light forward on a bottom surface, and one or more fixing grooves on an edge area; a light source unit which is disposed on a side surface of the light guide panel, and emits light towards the light guide panel; and a supporting member which supports the light guide panel, and comprises one ore more fixing protrusions being inserted into the fixing groove, wherein the amount of patterns formed on a darkness occurring area adjacent to the fixing groove is increased compared to that on an adjacent area, and the amount of patterns formed on a bright line occurring area adjacent to the fixing groove is decreased compared to that on an adjacent area.Type: GrantFiled: December 4, 2009Date of Patent: September 3, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Il-yong Jung, Myung-ryul Jung, Dae-hee Lee, Kyung-ock Jeong
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Patent number: 8520162Abstract: This invention relates to a back light module and a liquid crystal display thereof. The back light module includes a rear panel, an LGP, a PCB, a plurality of LEDs and at least an elastic clamping fastener. The rear panel includes a base plate and at least a sidewall. The LGP is positioned on the base plate. The PCB opposite to the LGP is positioned on the sidewall of the rear panel. The LEDs are positioned on the PCB. At least an elastic clamping fastener successively passes through the rear panel and the PCB to fasten the rear panel and the PCB. In addition, the top of the elastic clamping fastener is higher than the surface of the LEDs. The back light module and the liquid crystal display thereof in this invention are simple in structure, convenient in assembly, and low in cost.Type: GrantFiled: March 14, 2011Date of Patent: August 27, 2013Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventor: Guofu Tang
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Publication number: 20130215347Abstract: A display system comprises a reflection-type display device comprising a display panel and a reflecting part. The display panel does not comprise a coloring layer. The display panel selectively forms a light-transmitting region and a light-scattering region. The reflecting part is provided at a back surface side of the display panel. The display system also comprises a light source device projecting a monochrome light or a multicolor light to the display panel from a front surface side of the display panel.Type: ApplicationFiled: October 28, 2011Publication date: August 22, 2013Applicant: SHARP KABUSHIKI KAISHAInventors: Daisuke Tsukio, Eiji Satoh
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Patent number: 8514352Abstract: A phosphor-based multi-colored display is provided which includes a spatial light modulator comprising an addressable array of apertures each corresponding to a respective sub-pixel in the display; an array of phosphor regions each indexed to a corresponding aperture of the spatial light modulator; and a backlight which provides quasi-monochromatic light to phosphor within each of the phosphor regions. The phosphor within each of the phosphor regions, upon being excited by the quasi-monochromatic light of the backlight, emits light having a color different from a color of the quasi-monochromatic light, through the corresponding aperture of the spatial light modulator.Type: GrantFiled: December 10, 2010Date of Patent: August 20, 2013Assignee: Sharp Kabushiki KaishaInventors: David James Montgomery, Peter John Roberts, Lesley Ann Parry-Jones, Emma Jayne Walton
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Patent number: 8477266Abstract: Disclosed are a display backlight module and its manufacturing method. A multilayer reflector is particularly introduced into the display backlight module for a LCD display. The multilayer reflector is composed of a plurality of inter-stacked polymer films with various indexes of refraction. With introduction of interference principle, the multilayer reflector is designed to reflect or transmit the light with a specific wavelength range for acquiring a more uniform backlight. According to one of the embodiments, the display backlight module includes a backlight module, such as a direct-type or an edge-type light source. The module further includes the multilayer reflector and an optical-film module. This optical-film module optionally includes a brightness-enhancement film and a diffuser.Type: GrantFiled: February 18, 2011Date of Patent: July 2, 2013Assignee: Extend Optronics Corp.Inventors: Chao-Ying Lin, Jen-Huai Chang
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Patent number: 8477265Abstract: A display apparatus and a backlight unit are provided. The display apparatus includes: an image receiving unit which receives an image signal; an image processing unit which processes the received image signal; a display panel which displays the processed image signal; a cover unit which accommodates the display panel; a light source unit which is accommodated in an edge region of the cover unit; a reflective member which is accommodated in the cover unit in such a manner that the reflective member is disposed in the rear side of the display panel and which reflects the light emitted from the light source unit toward the display panel; and an integrally formed support member including a support member body which is disposed in the edge region, a light source unit support unit which is formed in the support member body and supports the light source unit, and a panel support unit which is formed in the support member body and supports the display panel.Type: GrantFiled: April 29, 2010Date of Patent: July 2, 2013Assignee: Samsung Electronics Co., Ltd.Inventor: Jun-mo Yoo
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Patent number: 8474992Abstract: A lighting device comprising: a light emitting module including a plurality of electrically connected light emitting bars each having a plurality of semiconductor light emitting devices; a chassis for containing the light emitting module and having a discharge opening; a reflection sheet arranged in the chassis; and a brightness nonuniformity reduction unit, wherein the light emitting bar includes: a band plate-shaped substrate; a wiring formed on one surface of the substrate; the plurality of semiconductor light emitting devices; and first and second connectors formed in proximity to opposing shorter sides on the one surface of the substrate, wherein the reflection sheet has at least a plurality of corresponding holes through which the plurality of semiconductor light emitting devices are inserted, and wherein the brightness nonuniformity reduction unit is arranged in proximity to a position of the first and second connectors of each light emitting bar.Type: GrantFiled: November 4, 2010Date of Patent: July 2, 2013Assignee: Sharp Kabushiki KaishaInventor: Hideo Takemura
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Patent number: 8466459Abstract: An organic light emitting display device having a uniform thin film in a sub-pixel region, and a method of manufacturing the organic light emitting display device. The organic light emitting display device includes a substrate, a pixel electrode disposed on the substrate, and a pixel define layer disposed on the substrate and exposing the pixel electrode. The surface of the pixel electrode is saw toothed or rough in shape.Type: GrantFiled: January 19, 2011Date of Patent: June 18, 2013Assignee: Samsung Display Co., Ltd.Inventor: Seung-Wook Chang
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Patent number: 8466907Abstract: An automatic brightness adjustment for devices with displays includes the capability to assess ambient light. The assessment may be made using circuitry, such as a light meter circuit, by exploiting exposure control circuitry, or using other approaches. The ambient light value is sent to a brightness adjustment driver, which may employ a look-up table to keep track of brightness adjustments for particular ambient conditions. The look-up table may include distinct adjustment values based upon the type of display.Type: GrantFiled: October 15, 2009Date of Patent: June 18, 2013Assignee: Intel CorporationInventor: Cynthia S. Bell
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Patent number: 8462293Abstract: A tandem type backlight comprises plural 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.Type: GrantFiled: September 9, 2011Date of Patent: June 11, 2013Assignee: Sharp Kabushiki KaishaInventors: Yuhsaku Ajichi, Takeshi Masuda
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Patent number: 8456588Abstract: An LCD backlight has a light source that emits a laser light, a lens, a mirror, a rotary polygon mirror, a scanning lens and a return mirror constituting a transforming optical system that transforms the laser light from the light source to a linear light. A light guiding plate allows the linear light to enter and emits two-dimensional light in the horizontal direction. An emission end face of the light source is disposed in a rear face side of the light guiding plate so that a surface normal line thereof is in the horizontal direction or is inclined downward from the horizontal direction. The lens, mirror and scanning lens are disposed in the rear face side of the light guiding plate, so that surface normal lines of the light transmission surface and light reflection surface thereof are all in the horizontal direction or are inclined downward from the horizontal direction.Type: GrantFiled: May 29, 2009Date of Patent: June 4, 2013Assignee: Panasonic CorporationInventors: Shinichi Shikii, Shinichi Kadowaki, Tatsuo Itoh, Takayuki Nagata, Kazuhisa Yamamoto
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Patent number: 8456592Abstract: A backlight unit and a liquid crystal display including the same are provided. The backlight includes a light guiding plate, a reflector, and at least one LED assembly including an LED light source, a substrate, and a support plate. A plurality of protrusions formed on a cover of the liquid crystal display are configured to mate to a plurality of concave portions formed on the light guiding plate, the reflector, and the LED assembly to mount the various components of the liquid crystal display onto the cover.Type: GrantFiled: August 25, 2010Date of Patent: June 4, 2013Assignee: LG Electronics Inc.Inventors: Wangseop Go, Sangho Seo
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Patent number: 8456589Abstract: The present invention is directed to a display device which comprises a display device, a mechanical light and optionally a luminance enhancement structure. This type of display device assembly is particularly useful for e-books comprising a luminance enhancement structure designed to direct a significant amount of light towards the reader of the e-books.Type: GrantFiled: July 26, 2010Date of Patent: June 4, 2013Assignee: SiPix Imaging, Inc.Inventors: Robert A. Sprague, Bryan Hans Chan, Craig Lin, Tin Pham, Manasa Peri
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Patent number: 8451400Abstract: A light guide panel (LGP) for use in a liquid crystal display (LCD) apparatus includes a light-emitting pattern surface on which light-emitting patterns are formed, an opposite surface opposite to the light-emitting pattern surface, and four edge surfaces. Lenticular patterns are formed on one of the light-emitting pattern surface and the opposite surface. The light-emitting pattern surface includes a light-emitting part in which the light-emitting patterns are formed; and an edge part which extends along the four edge surfaces to enclose the light-emitting part and in which at least one fixing groove is formed to fix the LGP. The light-emitting part includes a pattern reducing region which faces the fixing groove and has a lower light-emitting pattern density than an other region of the light-emitting part.Type: GrantFiled: December 4, 2012Date of Patent: May 28, 2013Assignee: Samsung Electronics Co., Ltd.Inventors: Sin-wook Hyung, Dae-hee Lee, Myung-ryul Jung, Do-hyeon Baek, Kil-hong Lee, Hyeong-sik Choi
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Patent number: 8436876Abstract: Provided are a backlight unit and a display device having the same. The backlight unit includes a case having an opening, at least one lamp assembly disposed on a side surface of the case and including a light source, an optical transreflective unit on the case, the optical transreflective unit transmitting a portion of first light passing through the opening and reflecting a portion of second light generated from the light source, and an optical sheet including a first diffusion unit on the optical transreflective unit.Type: GrantFiled: October 18, 2012Date of Patent: May 7, 2013Assignee: LG Display Co., Ltd.Inventors: Ho Young Jeong, Deuk Su Lee, Jun Hyeok Yu, Jae Jung Han, Mi Young Do, Tae Han Kim
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Patent number: 8421954Abstract: An auxiliary light source device for a reflective liquid crystal display device includes a light source; a light directing member for directing incident light from the light source toward the reflective liquid crystal display device, the directing member having upper and lower surfaces, the lower surface having a plurality of convex portions protruding from the lower surface of the display device, each of the convex portions having a substantially planar surface at its end, the planar surface of the convex portion being substantially parallel to the lower surface; and a light reflecting member which guides light from the light source into the light directing member.Type: GrantFiled: June 9, 2000Date of Patent: April 16, 2013Assignee: LG Display Co., Ltd.Inventor: Jeongmin Moon
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Patent number: 8405798Abstract: Disclosed are a backlight unit capable of reducing heat and noise and a liquid crystal display using the same. The backlight unit comprises a light source unit comprising light sources for irradiating light; a cover bottom disposed under the light source unit; a vibration-absorbing member attached on the other surface of the cover bottom; and an inverter coupled to the cover bottom via the vibration absorbing member interposed therebetween.Type: GrantFiled: June 25, 2010Date of Patent: March 26, 2013Assignee: LG Display Co., Ltd.Inventors: Minso Jo, Hakmo Hwang
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Patent number: 8400585Abstract: A surface light source device includes a point source of light and a light guide plate causing light from the point source of light introduced from a light incident end face and emitted from a light emission surface to outside. The light guide plate is formed of a light introducing portion provided at an end of a light guide plate body. The point source of light is placed facing the light incident end face positioned at an end face of the light introducing portion. Along a region of the light introducing portion adjacent to the light guide plate body, a directivity converting portion is provided. The directivity converting portion is configured by arranging V-grooved directivity conversion patterns in an arc shape. A region of the light introducing portion has a thickness equal to that of the light guide plate body and has a surface positioned in the same plane.Type: GrantFiled: July 8, 2009Date of Patent: March 19, 2013Assignee: OMRON CorporationInventors: Masayuki Shinohara, Yasuhiro Tanoue, Takako Ishikawa, Yoshihiro Ueno
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Patent number: 8395723Abstract: A display device includes: a panel; a light source provided on a surface disposed with facing at an interval of a predetermined distance from the back of the panel of said panel; and at least one optical sheet placed in front of said light source; wherein said optical sheet is placed with predetermined inclination angle to the above back of the panel so that it becomes closer from the top end to the bottom end of the back of the panel of said panel.Type: GrantFiled: April 22, 2008Date of Patent: March 12, 2013Assignee: Sony CorporationInventor: Norimasa Furukawa
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Patent number: 8390762Abstract: A game machine including: a liquid crystal display including a liquid crystal panel and a back light unit; and at least one reel which is disposed behind the back light unit. The back light unit for a liquid crystal display includes: a pair of light guide plates which are disposed to face each other, transparent electrodes being formed on corresponding predetermined areas of surfaces facing each other of the light guide plates; a polymer dispersed liquid crystal layer which is formed in a space between the light guide plates and is formed by polymer dispersed liquid crystal; and a plurality of light sources respectively disposed at edges of the light guide plates.Type: GrantFiled: June 8, 2009Date of Patent: March 5, 2013Assignee: Tovis Co., Ltd.Inventor: Yong-beom Kim
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Patent number: 8368839Abstract: An optical adjusting member according to the invention includes a base member having optical transparency and a plurality of linear members provided on the base member and having optical transparency. A section of the linear member orthogonal to the lengthwise direction of the linear member includes a triangular first sectional part defined by first to third sides and an approximately triangular second sectional part. The second sectional part has a smaller area than that of the first sectional part and defined by fourth to sixth sides. The first side of the first sectional part is in contact with the surface of the base member. The second sectional part is formed on the second side of the first sectional part, and the fourth side of the second sectional part is in contact with the second side of the first sectional part.Type: GrantFiled: May 29, 2008Date of Patent: February 5, 2013Assignee: Hitachi Maxell, Ltd.Inventors: Katsusuke Shimazaki, Yoichi Ogawa, Masataka Sato, Eiji Koyama
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Patent number: 8363180Abstract: A liquid crystal display device performs suitable overshoot drive, even if a panel temperature is changed due to a change of the backlight emission luminance. The liquid crystal display device includes: a temperature sensor which detects the temperature in the device; an emphasis conversion section, which obtains, after the elapse of one vertical display period, an emphasis conversion parameter for making the transmissivity of the liquid crystal panel reach the transmissivity specified by input image signals, and which outputs applying voltage signals for the liquid crystal panel on the basis of the emphasis conversion parameter; and a main microcomputer which corrects the panel temperature of the liquid crystal panel on the basis of the changed light emission luminance when the light emission luminance of the backlight is changed. The emphasis conversion section variably controls the emphasis conversion parameter on the basis of the panel temperature corrected via the main microcomputer.Type: GrantFiled: October 4, 2010Date of Patent: January 29, 2013Assignee: Sharp Kabushiki KaishaInventors: Yoshitaka Matsui, Yoshiyuki Kawagoe
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Patent number: 8339539Abstract: A backlight (illumination device) 2 is disclosed including: light sources (5); light guide plates (7) for causing surface emission of light from the light sources (5); and a diffusing plate (8) for diffusing light from the light guide plates (7), the diffusing plate (8) facing a light-emitting surface (7a) of each of the light guide plates (7) at a predetermined distance. The illumination device further includes at least one maintaining section between the light-emitting surface (7a) of the light guide plate (7) and the diffusing plate (8), the maintaining section (10) maintaining the predetermined distance. The maintaining section (10) is provided on either of first and second end sections of the light-emitting surface (7a) of a light guide plate (7), the first end section being closer to a corresponding light source (5), the second end section being farther from the corresponding light source (5).Type: GrantFiled: July 16, 2008Date of Patent: December 25, 2012Assignee: Sharp Kabushiki KaishaInventors: Yuhsaku Ajichi, Takeshi Masuda
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Patent number: 8334943Abstract: A backlight unit 12 includes LEDs 16, a first light guide plate 18A, a second light guide plate 18B and a fitting structure. Each of the first light guide plate 18A and the second light guide plate 18B has a light entrance surface 34 and a light exit surface 36. The light entrance surface 34 faces the corresponding LED 16 and light from the LED 16 enters through the light entrance surface 34. The light exit surface 36 through which light exits is arranged along an arrangement direction in which the LED 16 and the light entrance surface 34 are arranged. The light guide plates 18 are arranged in a parallel layout in the arrangement direction and partially overlap in a direction perpendicular to the light exit surface 36. A light exit portion 31 is an overlapping area OA that is provided on the first light guide plate 18A on a relatively light output side.Type: GrantFiled: June 19, 2009Date of Patent: December 18, 2012Assignee: Sharp Kabushiki KaishaInventor: Shiyoshi Cho
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Patent number: 8305516Abstract: Disclosed is a liquid crystal display (LCD) device capable of improving a use efficiency of light emitting diode (LED) printed circuit boards (PCBs) by configuring the existing plate type LED PCBs in a bar type so as to reduce an area used, the LCD device including, an LCD panel configured to display images, a backlight unit disposed at a lower portion of the LCD panel for providing light to the LCD panel, and provided with a plurality of light emitting diode (LED) printed circuit boards (PCBs) formed in a bar type, and a plurality of LEDs disposed on each of the LED PCBs to be spaced apart from each other, and casing components including a mold frame for receiving and fixing the LCD panel and the backlight unit, an upper cover and a bottom cover.Type: GrantFiled: August 6, 2009Date of Patent: November 6, 2012Assignee: LG Display Co., Ltd.Inventors: Min-Su Cho, Jae-Ho Lee, Sang-Dae Lee
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Patent number: 8305515Abstract: Provided are a backlight unit and a display device having the same. The backlight unit includes a case having an opening, at least one lamp assembly disposed on a side surface of the case and including a light source, an optical transreflective unit on the case, the optical transreflective unit transmitting a portion of first light passing through the opening and reflecting a portion of second light generated from the light source, and an optical sheet including a first diffusion unit on the optical transreflective unit.Type: GrantFiled: December 26, 2007Date of Patent: November 6, 2012Assignee: LG Display Co., Ltd.Inventors: Ho Young Jeong, Deuk Su Lee, Jun Hyeok Yu, Jae Jung Han, Mi Young Do, Tae Han Kim
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Patent number: 8300173Abstract: A system for displaying images is provided. The system includes a reflective liquid crystal display device including a first substrate having a pixel unit array thereon. A second substrate is disposed above the first substrate and a liquid crystal layer is disposed therebetween. A plurality of first electrodes is disposed between the second substrate and the liquid crystal layer and corresponds to each pixel unit including a reflective electrode. A second electrode is disposed between the plurality of first electrodes and the liquid crystal layer to serve as a common electrode that controls the liquid crystal layer. An organic light-emissive layer is disposed between the plurality of first electrodes and the second electrode. A light-emitting device is constituted by the plurality of first electrodes, the second electrode, and the organic light-emissive layer to provide light onto the reflective electrode.Type: GrantFiled: May 20, 2010Date of Patent: October 30, 2012Assignee: Chimei Innolux CorporationInventors: Du-Zen Peng, Ryuji Nishikawa
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Patent number: 8290318Abstract: A light trapping optical cover employing an optically transparent layer with a plurality of light deflecting elements. The transparent layer is configured for an unimpeded light passage through its body and has a broad light input surface and an opposing broad light output surface. The light deflecting elements deflect light incident into the transparent layer at a sufficiently high bend angle with respect to a surface normal and direct the deflected light toward a light harvesting device adjacent to the light output surface. The deflected light is retained by means of at least TIR in the system formed by the optical cover and the light harvesting device which allows for longer light propagation paths through the photoabsorptive layer of the device and for an improved light absorption. The optical cover may further employ a focusing array of light collectors being pairwise associated with the respective light deflecting elements.Type: GrantFiled: January 8, 2012Date of Patent: October 16, 2012Assignee: SVV Technology Innovations, Inc.Inventor: Sergiy Victorovich Vasylyev
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Patent number: 8284351Abstract: A backlight unit and a video display apparatus having a plural number of sets of one or more of light sources. A light guidance plate for guiding lights from the light sources to a side of a liquid crystal panel, to be emitted. The light sources are disposed on one end side of the light guidance plate. Assuming that width of the gap or groove is “d”, distance between a light incident surface of the liquid crystal panel and a light emission surface of the light guidance plate, or distance between a light incident surface of an optical member disposed between the liquid crystal panel and the light guidance plate and a light emission surface of the light guidance plate is “h”, and further 2.0 mm>d?0.1 mm and 10.0 mm>h?0.4 mm, then the following condition is satisfied: 4?h/d?100.Type: GrantFiled: January 19, 2012Date of Patent: October 9, 2012Assignee: Hitachi Consumer Electronics Co., Ltd.Inventors: Satoshi Ouchi, Koichi Sakita, Hajime Inoue, Yoshiharu Yamashita
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Patent number: 8277068Abstract: 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: March 12, 2012Date of Patent: October 2, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Koji Moriya, Takeshi Nishi
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Patent number: 8274626Abstract: A diffuser prism sheet, an LCD back light unit including the same, and an LCD device including the same, the diffuser prism sheet including a base film made of a transparent material, and a light refracting part on a surface of the base film, the light refracting part including a plurality of unit prisms arranged in one direction, having a predetermined cross-sectional shape and valley regions between adjacent unit prisms, and light diffusing elements in the valley regions between the adjacent unit prisms.Type: GrantFiled: September 14, 2009Date of Patent: September 25, 2012Assignee: Cheil Industries, Inc.Inventors: Jun Hyeak Choi, Man Suk Kim, Ju Yeol Choi, Seok Hoon Jang
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Patent number: 8248555Abstract: The present application provides a display apparatus including: a display panel having a plurality of pixels disposed in a matrix; a first polarizer; a second polarizer; a surface emitting light source; a third polarizer; and a polarization control element whose orientation of a transmission axis changes according to a control signal. A control section outputs a control signal that controls orientation of the transmission axis of the polarization control element so that a polarization axis of transmission light of the polarization control element is oriented in a direction crossing the transmission axis of the first polarizer in a part corresponding to a pixel position of black display and is oriented in a direction parallel to the transmission axis of the first polarizer in a part corresponding to a pixel position of white display.Type: GrantFiled: July 21, 2009Date of Patent: August 21, 2012Assignee: Sony CorporationInventors: Masaharu Senoue, Kentaro Okuyama
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Patent number: 8243044Abstract: Systems and methods for detecting a position of an object in a sensing region are disclosed. One system includes a position sensor having an opaque capacitive proximity sensor, a light source, and a light conductor coupled to the light source and at least partially disposed over the opaque sensor, the light conductor configured to transmit at least a portion of the light from the light source to generate driven light effects in the sensing region. The system further includes a processor configured to control production of the light, and a display configured to illustrate a digital representation based on the position. A method includes the steps of sensing a position of an object in the sensing region based on a conductive property of the object, controlling light produced by a light source, and generating driven light effects in the sensing region using at least a portion of the light.Type: GrantFiled: April 10, 2008Date of Patent: August 14, 2012Assignee: Synaptics IncorporatedInventors: Bob Lee Mackey, Shawn P. Day, Alfred Woo, Mark Jennings
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Patent number: 8243230Abstract: An image display apparatus including a display device for displaying an image by emission of display light in a first direction; a scattering layer disposed in front of the display device, for scattering at least a portion of ambient light; a transparent plate-shaped light source, arranged parallel to the scattering layer and being optically coupled to the scattering layer. The plate-shaped light source may be a passive light source, in which case at least one light source is arranged along an edge of the plate-shaped light source. When the display device is ON, the scattering layer and the plate-shaped light source are transparent. When the display device is OFF, the scattering layer is scattering and the plate-shaped light source is ON.Type: GrantFiled: February 21, 2008Date of Patent: August 14, 2012Assignee: TP Vision Holding B.V.Inventors: Gerrit Oversluizen, Hendrik De Koning, Ronald Van Rijswijk, Eefje Janet Hornix, Cornelis Teunissen
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Patent number: 8233113Abstract: A surface illumination apparatus has: a plurality of light sources (12a, 12b) which emit lights; a light guiding plate (15) which allows the lights emitted from the light sources to enter through one of the side faces and emits the lights through one principal plane; a polarizing filter (19) which transmits lights in a predetermined polarizing direction and reflects lights in a polarizing direction perpendicular to the predetermined polarizing direction; a polarizing modulation plate (18) which performs predetermined modulation on the polarizing characteristics of the incident lights; and a reflection sheet (17) which regularly reflects the incident light.Type: GrantFiled: April 2, 2010Date of Patent: July 31, 2012Assignee: Panasonic CorporationInventors: Shinichi Shikii, Tatsuo Itoh, Hiroyuki Furuya, Shinichi Kadowaki
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Patent number: 8228448Abstract: A backlight module including a beam splitting film, a light guide plate, and two light emitting elements is provided. The beam splitting film includes a light transmissive plate and multiple strip-shaped protrusion structures. Each of the strip-shaped protrusion structures has a first inclined surface group and a second inclined surface group. The first inclined surface group includes a first inclined surface and a second inclined surface with different slopes. The second inclined surface group includes a third inclined surface and a fourth inclined surface with different slopes. The light guide plate is disposed beside the beam splitting film. The two light emitting elements are respectively disposed at two opposite sides of the light guide plate and capable of flickering alternately. A stereo display apparatus is also provided.Type: GrantFiled: September 20, 2010Date of Patent: July 24, 2012Assignee: Coretronic CorporationInventors: Tzeng-Ke Shiau, Ching-Shiang Li, Wei-Chung Chao, Chao-Hung Weng
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Patent number: 8228465Abstract: A white phosphor including: 40 to 50 parts by weight of a blue phosphor selected from the group consisting of ZnS:(Ag,Cl), ZnS:(Ag,Al), ZnS:(Ag,Al,Cl), and a combination thereof; 20 to 30 parts by weight of a green phosphor (Sr1-xCax)Ga2S4:Eu (0?x<0.2); and 20 to 30 parts by weight of a red phosphor selected from the group consisting of Y2O3:Eu, Y2O3:(Eu,Tb), Y2O2S:Eu, Y2O2S:(Eu,Tb), and combinations thereof. The white phosphor can be included in a light emission device. The light emission device can be included in a liquid crystal display.Type: GrantFiled: August 27, 2008Date of Patent: July 24, 2012Assignee: Samsung SDI Co., Ltd.Inventors: Yong-Chan You, Jae-Woo Bae, Gyeong-Jae Heo, Kyu-Chan Park, Sang-Hyuk Lee, Sun-Hwa Kwon, Ji-Hyun Kim, Ui-Song Do, Young-Suk Cho, Byung-Kyun Kim, Hui-Young Ku, Yoo-Jung Lee
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Patent number: 8226256Abstract: A display unit which the view angle is limited and the front luminance is improved is provided. The display unit includes a display device, and a light guiding part which is provided to face the display device, has an incident face on the side opposing to the display device, an emitting face on the opposite side of the display device, and a reflective face on the side face, and has a cross section expanding from the incident face to the emitting face.Type: GrantFiled: March 1, 2007Date of Patent: July 24, 2012Assignee: Sony CorporationInventors: Tetsuo Urabe, Yuichi Iwase, Koichi Tsukihara, Yoichi Tomo, Toshihiro Fukuda
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Patent number: 8218105Abstract: 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: April 28, 2011Date of Patent: July 10, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Toru Takayama, Junya Maruyama, Yuugo Goto, Yumiko Ohno, Akio Endo, Yasuyuki Arai
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Patent number: 8194206Abstract: A planar light-emitting device allowing for high luminance uniformity has a plurality of light-emitting units (4), each including a lightguide plate (3) having a light-exiting surface, an opposite surface opposite to the light-exiting surface, a peripheral side surface extending between the respective peripheral edges of the light-exiting surface and the opposite surface, and a light-entrance surface (3a) defined by a part of the peripheral side surface. Each light-emitting unit further includes a light source (2) adjacently disposed to face the light-entrance surface to emit light into the lightguide plate through the light-entrance surface. The light-emitting units are arranged in a plurality of mutually adjacent rows with the light-exiting surfaces (3a) of their respective lightguide plates being substantially flush with each other. Adjacent rows of the light-emitting units are displaced relative to each other in the direction of the rows.Type: GrantFiled: May 26, 2009Date of Patent: June 5, 2012Assignee: Citizen Electronics Co., Ltd.Inventors: Takashi Shimura, Taku Kumasaka
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Patent number: 8164564Abstract: 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: GrantFiled: September 1, 2006Date of Patent: April 24, 2012Assignee: 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
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Patent number: 8159632Abstract: An object of the present invention is to provide a surface light source element configured to enhance projection light from an opening boundary of a supporting frame (12), wherein the projection light is required as a surface light source element, so that the surface light source element makes it possible to clearly illuminate an observation direction even in the case where the surface light source element is made large in size or thin in thickness.Type: GrantFiled: January 29, 2009Date of Patent: April 17, 2012Assignee: Kuraray Co., Ltd.Inventor: Seiji Kinoshita
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Patent number: 8154688Abstract: A planar light-emitting device has a plurality of light-emitting units each including a light source and a lightguide plate. The light-emitting units are arranged with the light-exiting surfaces of their respective lightguide plates being substantially flush with each other. Each lightguide plate has an upper surface as a light-exiting surface, a lower surface opposite to the light-exiting surface, and a peripheral side surface extending between the respective peripheral edges of the upper and lower surfaces. The lightguide plate emits light received from the light source from the light-exiting surface. At least a part of the peripheral side surface is an inclined surface inclined relative to the light-exiting surface.Type: GrantFiled: May 26, 2009Date of Patent: April 10, 2012Assignee: Citizen Electronics Co., Ltd.Inventors: Takashi Shimura, Taku Kumasaka
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Patent number: 8139179Abstract: A display apparatus includes a display panel that displays an image, and a viewing angle restricting element that selectively irradiates light with directivity in a restricting direction at a predetermined angle with respect to a direction of normal to the display panel, toward an observation side of the display panel.Type: GrantFiled: February 22, 2007Date of Patent: March 20, 2012Assignee: Casio Computer Co., Ltd.Inventor: Yasuhiro Daiku
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Patent number: 8134661Abstract: To suppress a decrease in the contrast caused by the reflection on the interface to the air layer without decreasing the quality of display. A reflection-type liquid crystal display device includes a light guide plate having a polarizing element stuck or adhered thereto on the side facing a reflection-type liquid crystal display panel and arranged maintaining a predetermined gap relative to the reflection-type liquid crystal display panel. The display device further includes a source of light arranged on an end surface side of the light guide plate, and a member having a light-diffusing function and interposed between the polarizing element and the light guide plate.Type: GrantFiled: April 7, 2011Date of Patent: March 13, 2012Assignee: Sharp Kabushiki KaishaInventors: Tetsuya Hamada, Kunihiro Tashiro, Mari Sugawara, Toshihiro Suzuki, Hidefumi Yoshida
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Patent number: 8132931Abstract: 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: May 26, 2011Date of Patent: March 13, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Koji Moriya, Takeshi Nishi
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Patent number: 8115890Abstract: A backlight unit, being thin-sized, but having high definition and high uniformity of luminance, and a video display apparatus applying the same therein, has a plural number of sets of at least one or more of light source(s) (1) and a light guidance plate (2) for guiding lights from the light source(s) to a side of a liquid crystal panel, to be emitted therefrom, wherein the light source(s) is/are disposed on one end side of the light guidance plate, and other set of light source is disposed on a rear surface side of the other end of the light guidance plate opposite to the one end.Type: GrantFiled: January 8, 2010Date of Patent: February 14, 2012Assignee: Hitachi Consumer Electronics Co., Ltd.Inventors: Satoshi Ouchi, Koichi Sakita, Hajime Inoue, Yoshiharu Yamashita
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Patent number: 8111346Abstract: A liquid crystal display has a frame including a base and a reinforced portion extending from the base, the reinforced portion defining a partial edge of the frame. The liquid crystal display further includes an optical sheet on the base, the optical sheet including a backlight unit, a flexible printed circuit on the optical sheet, and a liquid crystal display panel comprising a large scale integrated circuit, the liquid crystal display panel substantially covering the optical sheet. A window is attached to and substantially covers the frame at least one support extends from the base for supporting the window and/or the backlight unit.Type: GrantFiled: May 15, 2008Date of Patent: February 7, 2012Assignee: Samsung Mobile Display Co., Ltd.Inventors: Jinseok Jang, Younbum Lee, Yeonshil Jung