Specifically For Guiding Light In A Front-lit Device Patents (Class 349/63)
  • Patent number: 8879019
    Abstract: A liquid crystal display apparatus including: a liquid crystal panel which includes a device substrate, a counter substrate arranged to face the device substrate, and a protruded section in which the device substrate protrudes from an end portion of the counter substrate; a lighting system which includes an optical sheet arranged on a side which is opposite a light emission side of the liquid crystal panel; and a first frame portion which supports an edge of the protruded section of the device substrate and includes a protruded plate section that protrudes between the device substrate and the optical sheet, wherein the first frame portion includes a first stage section which faces a side end surface of the device substrate and a second stage section which is arranged between an edge of the protruded plate section and the first stage and which faces an outline side of the optical sheet.
    Type: Grant
    Filed: August 2, 2012
    Date of Patent: November 4, 2014
    Assignee: Seiko Epson Corporation
    Inventors: Nobutaka Urano, Yoichi Momose
  • Patent number: 8860653
    Abstract: A method for controlling characteristics of an electronic device based on ambient light levels is provided. In one embodiment, the method includes receiving light at an ambient light sensor of a device and measuring components, such as color components, of the visible light. The component levels may be weighted differently by factors that vary based on the intensity of the light received by the ambient light sensor. Also, the brightness level of a light source in the device or color output of the device may be controlled based on the weighted component levels. Additional methods, systems, and devices relating to control of an electronic device based on sensed ambient light are also disclosed.
    Type: Grant
    Filed: September 1, 2010
    Date of Patent: October 14, 2014
    Assignee: Apple Inc.
    Inventors: Peter H. Mahowald, Ulrich T. Barnhoefer
  • Publication number: 20140300843
    Abstract: A light guiding system includes an ambient light gathering system for absorbing the ambient light to generate absorbed light; multiple light guiding devices each of which includes a light input end near the ambient light gathering system and a light output end near an incident side of a light guiding plate, and multiple light diffusion devices between the light output end and the incident side of the light guiding plate, for broadening a light-emitting angle of the light output end. The absorbed light enters the light input end and is guided to the light output end to form a backlight source. The light guiding system utilizes a light diffusion device to broaden the light-emitting angle of the light output end such that the light uniformity of the light output end is improved and the optical quality of the edge-lighting backlight module is raised.
    Type: Application
    Filed: January 21, 2013
    Publication date: October 9, 2014
    Inventors: Che-chang Hu, Hu He
  • Patent number: 8850714
    Abstract: A chromaticity correction device corrects chromaticity of a video signal displayed on a display panel of a display device to correspond to a change in a luminance value of the display panel. The chromaticity correction device includes a luminance detection unit which detects the luminance value, a backlight driving level detection unit which detects a backlight driving level, a temperature detection unit which detects an internal device temperature or an ambient temperature, a reference luminance value calculation unit which estimates a reference luminance value in a characteristic of an initial state, a chromaticity calculation unit which obtains a chromaticity change amount of white point chromaticity and estimated white point chromaticity that is an estimated value of current white point chromaticity, a chromaticity correction value calculation unit which obtains a chromaticity correction value and a chromaticity correction circuit which corrects the chromaticity of the video signal.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: October 7, 2014
    Assignee: NEC Display Solutions, Ltd.
    Inventor: Katsuyuki Matsui
  • Patent number: 8842234
    Abstract: The invention provides a backlight module and a LCD device. The backlight module includes a side frame, and a rear panel; the rear panel is provided with a side wall fixedly matched with the side frame, the side wall of the rear panel is provided with a light source, and a gap is reserved between the top of the side wall and the side frame. The invention can effectively block the path that the heat at the side of the light source is transferred to the LCD panel, and can effectively prevent the risk of the liquid crystal liquefaction of the LCD panel, thereby improving the optical display taste of the LCD panel.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: September 23, 2014
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Yajun Yu
  • Patent number: 8842238
    Abstract: A backlight unit being scan-driven is discussed. The backlight unit according to an embodiment includes light sources configured to emit light, and a light guide plate disposed parallel to the light sources and configured to convert spotted lights entered from the light sources into two-dimensional light. The light guide plate includes a plurality of air barriers arranged at a fixed interval and configured to guide lights from the light sources in blocks with a width of the fixed interval.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: September 23, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Hee Kyung Lee, Byoung Ku Kim, Jun Ho Bae, Yong Ik Hwang
  • Patent number: 8836890
    Abstract: Disclosed is a display apparatus capable of preventing external light from being excessively reflected and increasing the reflection efficiency of internal light, thereby improving visibility of the display apparatus. The display apparatus includes a display panel, which displays an image, and a front-light unit including an internal light source, a light guide plate to guide the internal light emitted from the internal light source to the display panel, and an optical member provided at an upper portion of the light guide plate. The display apparatus also includes a display panel, an internal light source emitting internal light, an optical member preventing external light from being reflected, and a substrate with the optical member.
    Type: Grant
    Filed: October 8, 2010
    Date of Patent: September 16, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Sangwook Lee, Doowon Lee
  • Patent number: 8823632
    Abstract: Disclosed herein is a light guide panel for a backlight unit of a liquid crystal display (LCD). The light guide panel enables adjustment in viewing angle and brightness at a specific position and angle by controlling a cross-sectional shape of front prisms of the light guide panel.
    Type: Grant
    Filed: November 26, 2007
    Date of Patent: September 2, 2014
    Assignee: Cheil Industries, Inc.
    Inventors: Chul Goo Chi, Sung Hyun Joo, O Yong Jeong, Jae Han Kim, Man Suk Kim
  • Patent number: 8823900
    Abstract: An illumination device is a device which irradiates light to a reflection-type display panel in which a liquid crystal is sandwiched between a pair of substrates. The illumination device includes a light emitting portion formed such that an organic EL layer is sandwiched between the pair of substrates. A first electrode which is in contact with the organic EL layer includes a metal portion and a transparent portion through which light can transmit. Light does not transmit through the metal portion provided at the viewing side. Further, the illumination device includes a microlens array arranged so as to cover the light emitting portion at the viewing side of the light emitting portion.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: September 2, 2014
    Assignee: Seiko Epson Corporation
    Inventor: Takehiko Kubota
  • Patent number: 8810528
    Abstract: This disclosure provides systems, methods and apparatus for a front illumination device with metalized light-turning features. In one aspect, an illumination device with integrated touch sensor capability includes a light guide having a metalized light-turning feature and an electrode system for sensing changes to the capacitance between electrodes in the electrode system induced by the proximity of an electrically conductive body, such as a human finger. The metalized light-turning features may be electrically connected to and/or part of the electrode system.
    Type: Grant
    Filed: December 27, 2010
    Date of Patent: August 19, 2014
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Ion Bita, Stephen P. Dhanens, Evgeni P. Gousev, Kollengode S. Narayanan
  • Patent number: 8804067
    Abstract: A display device includes a display module, a light source module and a guiding optical film. The display module includes a first substrate, a second substrate and a display medium. The light source module generates directional light. The display module has a vertical electric field. The display medium is optically isotropic, and the display medium is optically anisotropic when driven by the vertical electric field. The directional light is not perpendicular to the first substrate when the directional light enters the display nodule. The directional light is not perpendicular to the second substrate when the directional light exits the display module. The guiding optical film is disposed on the second substrate and has a light incident surface and a light emitting surface. After the directional light exits the guiding optical film, emitting light is formed, and the emitting light and the light emitting surface has an included angle there between.
    Type: Grant
    Filed: September 24, 2011
    Date of Patent: August 12, 2014
    Assignees: Au Optronics Corporation, University of Central Florida Research Foundation, Inc.
    Inventors: Hui-Chuan Cheng, Shin-Tson Wu, Jin Yan, Young-Ran Chuang, Ching-Huan Lin
  • Patent number: 8804066
    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: Grant
    Filed: October 18, 2011
    Date of Patent: August 12, 2014
    Assignee: Panasonic Liquid Crystal Display Co., Ltd.
    Inventors: Ikuko Imajo, Sachiko Yamazaki, Kikuo Ono
  • Patent number: 8798425
    Abstract: In various embodiments described herein, a display device includes a front illumination device that comprises a light guide disposed forward of an array of display elements, such as an array of interferometric modulators, to distribute light across the array of display elements. The light guide may include a turning film to deliver uniform illumination from a light source to the array of display elements. For many portable display applications, the light guide comprises the substrate used in fabricating the display elements. The display device may include additional films as well. The light guide, for example, may include a diffuser and/or an optical isolation layer to further enhance the optical characteristics of the display.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: August 5, 2014
    Assignee: Qualcomm MEMS Technologies, Inc.
    Inventors: Ion Bita, Gang Xu, Lai Wang, Marek Mienko, Russell Wayne Gruhlke
  • Patent number: 8780085
    Abstract: A method of enhancing input imaging resolution includes sequentially blocking light from different portions of an object with a series of resolution-enhancing patterns displayed between the object and an image detector. The method further includes detecting light filtered by the series of resolution-enhancing patterns and integrating light detected while different resolution-enhancing patterns of the series of resolution-enhancing patterns are displayed between the object and the detector.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: July 15, 2014
    Assignee: Microsoft Corporation
    Inventors: Adrian Travis, Timothy Large
  • Patent number: 8773612
    Abstract: A light emitting module (1) comprises a module substrate (2), a light emitting diode string (31), and a sealing member (48). The light emitting diode string (31) includes light emitting diode elements (32) and bonding wires (37) which connect the light emitting diode elements (32). The light emitting diode element (32) has a pair of element electrodes (33, 34) and has a rectangular shape extending in a direction along which the element electrodes (33, 34) are aligned. The sealing member (48) is laminated on the module substrate (2) to seal the light emitting diode string (31). The light emitting diode elements (32) are arranged at intervals in a direction crossing the direction along which the element electrodes (33, 34) are aligned, and the element electrodes (33, 34) with the same polarity are aligned to be adjacent to each other in an arrangement direction of the light emitting diode elements (32) between the light emitting diode elements (32) adjacent to each other.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: July 8, 2014
    Assignee: Toshiba Lighting & Technology Corporation
    Inventors: Tomohiro Sanpei, Kiyoshi Otani, Masahiro Izumi, Junya Murata, Akiko Saito, Yumiko Hayashida
  • Patent number: 8743316
    Abstract: 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: Grant
    Filed: May 7, 2013
    Date of Patent: June 3, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Myung-ryul Jung, Do-hyeon Baek, Kil-hong Lee, Hyeong-sik Choi
  • Patent number: 8733959
    Abstract: It is an object to manufacture a highly reliable backlight device with less color unevenness and less luminance unevenness, and a high-performance and highly reliable display device including the backlight device, which can display a high quality image. A light emitting diode (LED) is used as a light source of a backlight device and thermoelectric elements are provided in a chassis for holding the light emitting diode so as to surround the light emitting diode (the thermoelectric elements are provided under the light emitting diode and on the four sides thereof). A temperature in the backlight device is adjusted by cooling and heating by the thermoelectric elements.
    Type: Grant
    Filed: September 12, 2012
    Date of Patent: May 27, 2014
    Assignee: Semiconductor Energy Laboratory Co., Ltd.
    Inventors: Koji Moriya, Takeshi Nishi
  • Patent number: 8702277
    Abstract: A white light emitting diode includes a blue light emitting diode (“LED”) light source, and a light conversion layer which converts incident light from the blue LED light source into white light. The light conversion layer includes a green light emitting semiconductor nanocrystal and a red light emitting semiconductor nanocrystal. The white light emitting diode has a red, green and blue color (“RGB”) color locus which is within a chrominance error range (±4?E*ab) locus from the constant hue locus of each of sRGB color coordinates, or within a chrominance error range (±4?E*ab) locus from the constant hue locus of each of AdobeRGB color coordinates.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: April 22, 2014
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Seoung-Jae Im, Seo-Young Choi, Eun-Joo Jang
  • Patent number: 8698977
    Abstract: Provided is a lighting device (3) that includes a light guide plate (10) having a light entry surface (10a) through which the light originating from a light-emitting diode unit (9) enters, and a light-emitting surface (10c) from which the light that has entered through the light entry surface (10a) exits. The light-emitting diode unit (9) has light-emitting elements (26a and 27a) arranged linearly on a base member (28) with a prescribed interval therebetween, and sealing resin elements (26b and 27b) that seal respective light-emitting elements (26a and 27a). The light entry surface (10a) of the light guide plate (10) is shaped so as to engage with the sealing resin elements (26b and 27b).
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: April 15, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroaki Shigeta, Naru Usukura
  • Patent number: 8690407
    Abstract: An illumination unit includes an LED and a tabular light guide plate having a light emitting surface for emitting light from the LED as planar light, wherein a recessed portion is formed in the opposite surface of the tight emitting surface of the light guide plate, and wherein the LED is provided in the recessed portion so that the optical axis of the LED becomes parallel to the light emitting surface of the light guide plate. Further, a plurality of LEDs are arranged along the longer direction of the recessed portion, a dimming pattern is provided at a location corresponding to each of a plurality of LED of the light emitting surface of the light guide plate, and the shape or the size of the dimming pattern is varied with a location on the light emitting surface of the light guide plate.
    Type: Grant
    Filed: August 6, 2012
    Date of Patent: April 8, 2014
    Assignee: Hitachi Consumer Electronics Co., Ltd.
    Inventors: Mikio Shiraishi, Masayuki Tanabe, Mika Tanimura, Shoji Yamamoto, Kenji Takano, Yoshifumi Shimane, Yasuaki Ohara, Reiji Nakamura
  • Patent number: 8687139
    Abstract: An LCD device adapted to prevent a malfunction due to static electricity is disclosed. The LCD device includes: a liquid crystal display panel; a panel guider configured to support edges of the liquid crystal display panel; a bottom cover combined with the panel guider; and at least one conductive tape attached to the liquid crystal display panel and the bottom cover, and configured to include: a plurality of slit trains formed in a pattern, that positions of slits in one of the slit trains are shifted from those in adjacent slit trains along a first direction.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: April 1, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Min Gyu Lee, Jin Man Bae
  • Patent number: 8668373
    Abstract: A thin backlight module includes a light guide plate, a light source module, and an adhesive layer. The light guide plate has a light-entering end and a bottom, wherein a plurality of troughs spaced at intervals are formed on a portion of the bottom connected to the light-entering end. The light source module is disposed corresponding to the light-entering end and includes a substrate and a plurality of light sources. The light sources are disposed on the substrate and distributed along the light-entering end, wherein each of the light sources corresponds to an interval between the adjacent troughs. The adhesive layer is attached to the substrate, faces the bottom of the light guide plate, and extends into the troughs to be attached to the light guide plate.
    Type: Grant
    Filed: March 3, 2013
    Date of Patent: March 11, 2014
    Assignee: AU Optronics Corporation
    Inventors: Yung Chih Liu, Chih-Shun Fan, Yu-Sen Jang
  • Patent number: 8646932
    Abstract: Provided are a backlight unit and a display device having the same. The backlight unit configured to emit light onto a display panel in which one screen is defined into a plurality of display areas includes a bottom frame having a bottom surface and a sidewall, a plurality of light emitting diodes (LEDs) defining a plurality of light emitting areas corresponding to the display areas of the display panel, and an integrated light guide plate covering the plurality of LEDs, the integrated light guide plate being disposed on the plurality of light emitting areas corresponding to one screen. The light guide plate has a plurality of grooves for receiving at least one LED in an under surface thereof.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: February 11, 2014
    Assignee: LG Innotek Co., Ltd.
    Inventors: Kum Tae Lee, Moon Jeong Kim, Duk Hyun Yun
  • Patent number: 8643804
    Abstract: A light generating device which may be used as a backlight unit and a display device including the light generating device are discussed. According to an embodiment, the light generating device can include a base layer; light source devices disposed on the base layer and configured to emit light, the light source devices being spaced apart from each other, at least one of the light source devices including a light emitting diode for generating the light; and a light shielding layer covering the light source devices and configured to control an amount of the light being transmitted through the light shielding layer, wherein the light shielding layer includes slits disposed spaced apart from each other.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: February 4, 2014
    Assignee: LG Electronics Inc.
    Inventors: Hyunkwon Shin, Sangcheon Kim, Moongoo Choi, Seongman Jeon, Hyunho Lee, Joodo Park, Ilhwan Kim
  • Patent number: 8643807
    Abstract: A backlight unit having improved luminance and reduced profile, and a liquid crystal display including the same are disclosed. In one embodiment, the backlight unit includes: i) a light source, ii) a light guiding plate including an incoming surface on which light generated from the light source is incident, an upper surface substantially perpendicularly extended with respect to the incoming surface, and a bottom surface arranged facing the upper surface and iii) an optical sheet formed on the light guiding plate. The upper surface of the light guiding plate includes a guiding surface, an incoming surface, and an emission surface sequentially arranged close to the incoming surface of the light guiding plate, and the optical sheet may be formed to cover the inclined surface and the guiding surface.
    Type: Grant
    Filed: September 21, 2011
    Date of Patent: February 4, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Joo-Young Lee, Won-Il Lee
  • Patent number: 8636373
    Abstract: A spread illuminating apparatus includes a light source, a flexible printed circuit board, and a light guiding plate. The light guiding plate has a light incident face, and a light output portion planarly outputting light. The light guiding plate has an inclined portion between the light incident face and the light output portion, the inclined portion having an inclined face gradually reducing in thickness from the light incident face toward the light output portion; the flexible printed circuit board is placed on the light guiding plate from the side of the inclined face, and has a mounting portion mounting the light source, and a bent portion bent to the mounting portion and fixed to the inclined face of the inclined portion, and the bent portion includes a thickness reduced portion having a thickness less than the mounting portion.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: January 28, 2014
    Assignee: Minebea Co., Ltd.
    Inventor: Toru Kunimochi
  • Patent number: 8629968
    Abstract: The liquid crystal display device may include a first electrode; a second electrode facing the first electrode and forming a vertical electrical field together with the first electrode; a blue phase liquid crystal layer provided between the first electrode and the second electrode; and a first prism sheet provided to face the second electrode with the first electrode between the second electrode and the first prism sheet. The first prism sheet changes a path of incident light so that the incident light from the outside obliquely enters the blue phase liquid crystal layer with respect to the vertical electrical field.
    Type: Grant
    Filed: January 12, 2012
    Date of Patent: January 14, 2014
    Assignee: Kyungpook National University Industry-Academic Cooperation
    Inventors: Hak Rin Kim, Yong Hun Kim
  • Patent number: 8616755
    Abstract: A light guide plate for a surface light source device is provided, which includes an incident surface configured to have light from lamps disposed along a predetermined axis, be incident thereon, an emitting surface configured to have the incident light emitted therefrom, a back surface configured to face the emitting surface, and a plurality of unit cells configured to have microprism patterns engraved thereon and distributed and arranged on the back surface. A crossing angle of a microprism arrangement axis, formed by a ridge direction of the microprism patterns, and of an arrangement axis of the lamps is disposed in an alternate angle. The light guide plate has a high front brightness and an excellent uniformity in brightness and does not have a moire phenomenon. In a backlight unit, the use of optical sheets stacked on the light guide plate can be reduced.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: December 31, 2013
    Assignee: Toray Advanced Materials Korea Inc.
    Inventors: Sang Pil Kim, Chang Ik Hwang, Hee Cheong Lee, Sang Hoon Lee, Jun Sang Park, Kwang Soo Kim
  • Publication number: 20130335673
    Abstract: A display device (100) is provided with: a display panel (110); a light guide member (150) provided in a frame shape at a periphery of the display panel (110) on the viewing side, the light guide member (150) guiding the light that performs image display on the display panel (110) to outside of the display panel (110); and a transparent sheet-shaped covering member (140) laminated on the surface of the display panel (110) on the viewing side, with a portion of the covering member (140) provided in-between the light guide member (150) and the display panel (110). The light guide member (150) is bonded to the surface of the covering member (140) by an adhesive agent (151).
    Type: Application
    Filed: February 29, 2012
    Publication date: December 19, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Hiroyuki Moriwaki
  • Patent number: 8596846
    Abstract: The frontlight illumination system is intended for enhancing illumination of a reflective display having pixels arranged in a matrix pattern and using monochromatic laser lights as light sources. The unit contains a network of light-distributing planar ridge waveguides with holograms arranged in a matrix pattern that corresponds to the matrix pattern of the reflective display. The light-distributing holograms of the system are formed on opposite sides of each core of respective light-distributing planar ridge waveguides. Neighboring holograms located on opposite sides of the core are combined into pairs and are arranged on each core in positions at which they interact with a predetermined phase shift that doubles the intensity of light directed to the reflective display and extinguishes light directed to the external surface.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: December 3, 2013
    Assignee: Nano-Optic Devices, LLC
    Inventors: Vladimir Yankov, Alexander Goltsov, Igor Ivonin, Leonid Velikov
  • Patent number: 8582045
    Abstract: Disclosed is a liquid crystal display (LCD) device having a protection member capable of enhancing reliability against an external impact, and an outdoor visibility against an external light. The LCD device comprises: an LC panel for displaying images; a backlight unit disposed below the LC panel, and providing light; a protection member provided on the LC panel, and consisting of a tempered substrate for protecting the LC panel from an external impact, and an anti-reflect layer formed on the tempered substrate and reducing a reflectivity of external light; and an adhesive layer formed of a material having a similar refractivity to the LC panel and the tempered substrate of the protection member, for adhering the protection member onto the LC panel by being interposed therebetween.
    Type: Grant
    Filed: November 24, 2008
    Date of Patent: November 12, 2013
    Assignee: LG Display Co., Ltd.
    Inventors: Won-Seok Kang, Jong-Beom Lee
  • Patent number: 8576352
    Abstract: A backlight module includes a light guide plate and at least two groups of light sources. The light guide plate includes at least two independent light guide modules optically isolated from each other. Each group of light sources is located corresponding to an independent light guide module and controlled independently. A liquid crystal display using the backlight module is also related.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: November 5, 2013
    Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.
    Inventors: Jun Zhu, Yan Zhao, He Zhang, Guo-Fan Jin
  • Patent number: 8567977
    Abstract: The invention relates to an illumination system (30) for illuminating a display (20) of a display device (10), and to a display device. The illumination system comprises a light source (S1, S2, S3) and an optical control layer (40). The light source emits light via the optical control layer to the display for illuminating a predefined area (A1, A2, A3) on the display. The light is emitted from the light source in a diverging beam in a particular direction (O1, O2, O3) towards the predefined area. The optical control layer comprises an arrangement of portions (46) having a refractive index which is different from the optical control layer. The portions are arranged to reflect a part of the diverging light towards the predefined area. The measures according to the invention have the effect that the arrangement of portions in the optical control layer confines both the light emitted by the light source and the backscattered light reflected back to the light source to substantially within the predefined area.
    Type: Grant
    Filed: February 20, 2008
    Date of Patent: October 29, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Fetze Pijlman, Giovanni Cennini
  • Patent number: 8564738
    Abstract: A light emitting device includes a conductive support layer, a light emitting structure layer on the conductive support layer, a first transparent conductive layer and a second transparent conductive layer disposed between the conductive support layer and the light emitting structure layer, and an electrode on the light emitting structure layer.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: October 22, 2013
    Assignee: LG Innotek Co., Ltd.
    Inventors: Sang-Youl Lee, So Jung Kim, June O Song, Kwang Ki Choi
  • Patent number: 8564737
    Abstract: A LCD system including multiple light sources optically coupled through different light entry regions to at least one waveguide element positioned to backlight a LCD panel. A LCD system including multiple light sources coupled to light entry regions of two or more waveguides comprising a waveguide system positioned to backlight a LCD panel. Waveguides of various configurations and promoting even lighting of associated LCD panels are provided. Resulting LCD systems enable uniformly lit panels having diagonal measurements in excess of 12 to 14 inches, but the invention is not limited to panels of any particular size.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: October 22, 2013
    Assignee: Cree, Inc.
    Inventors: Nicholas W. Medendorp, Jr., Norbert Hiller, Russell G. Villard
  • Patent number: 8564739
    Abstract: A LCD system including multiple light sources optically coupled through different light entry regions to at least one waveguide element positioned to backlight a LCD panel. A LCD system including multiple light sources coupled to light entry regions of two or more waveguides comprising a waveguide system positioned to backlight a LCD panel. Waveguides of various configurations and promoting even lighting of associated LCD panels are provided. Resulting LCD systems enable uniformly lit panels having diagonal measurements in excess of 12 to 14 inches, but the invention is not limited to panels of any particular size.
    Type: Grant
    Filed: January 3, 2011
    Date of Patent: October 22, 2013
    Assignee: Cree, Inc.
    Inventors: Nicholas W. Medendorp, Jr., Norbert Hiller, Russell G. Villard
  • Patent number: 8564742
    Abstract: A LCD system including multiple light sources optically coupled through different light entry regions to at least one waveguide element positioned to backlight a LCD panel. A LCD system including multiple light sources coupled to light entry regions of two or more waveguides comprising a waveguide system positioned to backlight a LCD panel. Waveguides of various configurations and promoting even lighting of associated LCD panels are provided. Resulting LCD systems enable uniformly lit panels having diagonal measurements in excess of 12 to 14 inches, but the invention is not limited to panels of any particular size.
    Type: Grant
    Filed: July 15, 2011
    Date of Patent: October 22, 2013
    Assignee: Cree, Inc.
    Inventors: Nicholas W. Medendorp, Jr., Norbert Hiller, Russell G. Villard
  • Patent number: 8558969
    Abstract: An exemplary prism sheet includes a base including an upper surface and a plurality of lenses disposed on the upper surface. The upper surface is a wavy surface. A liquid crystal display device using the prism sheet is also provided.
    Type: Grant
    Filed: August 4, 2008
    Date of Patent: October 15, 2013
    Assignees: Innocom Technology (Shenzhen) Co., Ltd., Chimei Innolux Corporation
    Inventors: Yi Xu, Ching-Huang Lin
  • Patent number: 8553176
    Abstract: 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: Grant
    Filed: December 19, 2012
    Date of Patent: October 8, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshitaka Matsui, Yoshiyuki Kawagoe
  • Patent number: 8536568
    Abstract: 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: Grant
    Filed: August 26, 2008
    Date of Patent: September 17, 2013
    Assignees: SANYO Electric Co., Ltd., Epson Imaging Devices Corporation
    Inventors: Kenji Tanase, Kazunobu Mameno, Norio Koma, Manabu Takemoto
  • Patent number: 8525950
    Abstract: 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: Grant
    Filed: June 22, 2010
    Date of Patent: September 3, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Il-yong Jung
  • Patent number: 8525946
    Abstract: 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: Grant
    Filed: December 4, 2009
    Date of Patent: September 3, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Il-yong Jung, Myung-ryul Jung, Dae-hee Lee, Kyung-ock Jeong
  • Patent number: 8520162
    Abstract: 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: Grant
    Filed: March 14, 2011
    Date of Patent: August 27, 2013
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Guofu Tang
  • Publication number: 20130215347
    Abstract: 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: Application
    Filed: October 28, 2011
    Publication date: August 22, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Daisuke Tsukio, Eiji Satoh
  • Patent number: 8514352
    Abstract: 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: Grant
    Filed: December 10, 2010
    Date of Patent: August 20, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: David James Montgomery, Peter John Roberts, Lesley Ann Parry-Jones, Emma Jayne Walton
  • Patent number: 8474992
    Abstract: 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: Grant
    Filed: November 4, 2010
    Date of Patent: July 2, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Hideo Takemura
  • Patent number: 8477266
    Abstract: 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: Grant
    Filed: February 18, 2011
    Date of Patent: July 2, 2013
    Assignee: Extend Optronics Corp.
    Inventors: Chao-Ying Lin, Jen-Huai Chang
  • Patent number: 8477265
    Abstract: 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: Grant
    Filed: April 29, 2010
    Date of Patent: July 2, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Jun-mo Yoo
  • Patent number: 8466459
    Abstract: 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: Grant
    Filed: January 19, 2011
    Date of Patent: June 18, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventor: Seung-Wook Chang
  • Patent number: 8466907
    Abstract: 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: Grant
    Filed: October 15, 2009
    Date of Patent: June 18, 2013
    Assignee: Intel Corporation
    Inventor: Cynthia S. Bell