Specifically For Guiding Light In A Front-lit Device Patents (Class 349/63)
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Patent number: 8979342Abstract: A system for illuminating a reflective display or other material from a planar front device and a method of manufacture thereof. The system includes a light guide plate that conducts light from an edge light source across the face of a reflective display. Micro scattering features are formed on an outer surface of the light guide, farthest from the reflective display or material. A stepped index layer is formed on the surface of light guide plate containing the micro scattering features. The stepped index layer has an index of refraction lower than an index of refraction of the light guide plate to assist in the total internal reflection of light injected into the light guide plate. The micro scattering features, light reflecting areas, redirect luminous flux toward the display. In one embodiment, the micro scattering features are formed as white dots on the light guide plate.Type: GrantFiled: August 17, 2012Date of Patent: March 17, 2015Assignee: barnesandnoble.com llcInventors: Charles Neugebauer, William Saperstein
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Patent number: 8976311Abstract: A backlight unit adapted to implement enhanced light efficiency and uniform brightness is disclosed. The backlight unit includes a plurality of light sources arranged at fixed intervals, a diffusion plate disposed on the plurality of light sources, prism patterns formed on one surface of the diffusion plate, and micro-lens patterns formed on the other surface of the diffusion plate. The vertex angle of each prism pattern is in a range of about 64°˜76°.Type: GrantFiled: December 16, 2009Date of Patent: March 10, 2015Assignee: LG Display Co. Ltd.Inventors: Min Joo Kim, Dong Hyeok Kim, Jin Ryun Kim
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Patent number: 8976319Abstract: Provided is a display device that includes: a display panel (7) that has a display surface that displays an image; a fan (500); an ion-generating device (520) that can generate ions; and a guiding mechanism (620) that can selectively guiding air from the fan (500) to the display surface and to the rear side of the display surface. The air that is guided to the display surface is guided together with ions that are generated by the ion-generating device (520).Type: GrantFiled: November 9, 2011Date of Patent: March 10, 2015Assignee: Sharp Kabushiki KaishaInventor: Yukihide Kohtoku
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Patent number: 8964146Abstract: Optical constructions are disclosed. A disclosed optical construction includes first and second optical layers having first and second major surfaces that face each other and are separated by an air gap. The first and second surfaces are susceptible to physically contacting each other at a location in the air gap. The optical construction further includes an optical film that is disposed at the location to prevent the first and second major surfaces from contacting each other at the location. The optical film has an effective index of refraction that is not greater than about 1.3.Type: GrantFiled: April 14, 2010Date of Patent: February 24, 2015Assignee: 3M Innovative Properties CompanyInventors: Encai Hao, William Blake Kolb, John A. Wheatley, Fei Lu, Adam D. Haag
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Patent number: 8952935Abstract: A touch display, including: a light source; a light guide plate, having a first refractive index and having a side face close to the light source; a cover layer, having a second refractive index and being placed over the light guide plate, and the second refractive index is smaller than the first refractive index; a plurality of pillar structures, having a third refractive index and being placed under the light guide plate, and the third refractive index is larger than or equal to the first refractive index; a touch structure, placed over the cover layer; and an electronic paper device, placed under the pillar structures.Type: GrantFiled: January 17, 2012Date of Patent: February 10, 2015Assignee: E Ink Holdings Inc.Inventors: Hsin-Tao Huang, Chuang-Chuang Tsai
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Patent number: 8953118Abstract: A liquid crystal display apparatus according to an embodiment of the invention includes: a liquid crystal cell; polarizing plates placed on both sides of the liquid crystal cell; a light diffusing element provided outside of the polarizing plate on a viewer side; and a backlight unit provided outside of the polarizing plate on an opposite side of the viewer side. The backlight unit includes a collimated light source device that emits collimated light having a brightness half-value angle of 3° to 35° toward the liquid crystal cell, and a ratio Fw(BL)/Fw(FD) between a diffused light half-value angle Fw(FD) of the light diffusing element and the brightness half-value angle Fw(BL) of the collimated light is 0.5 or less.Type: GrantFiled: November 26, 2010Date of Patent: February 10, 2015Assignee: Nitto Denko CorporationInventors: Akinori Nishimura, Hiroyuki Takemoto, Takehito Fuchida, Minoru Miyatake, Shunsuke Shutou
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Patent number: 8919997Abstract: 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±2?E*ab) locus from the constant hue locus of each of sRGB color coordinates, or within a chrominance error range (±4?E*ab±2?E*ab) locus from the constant hue locus of each of AdobeRGB color coordinates.Type: GrantFiled: April 17, 2014Date of Patent: December 30, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Seoung-Jae Im, Seo-Young Choi, Eun-Joo Jang
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Patent number: 8919998Abstract: 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±2?E*ab) locus from the constant hue locus of each of sRGB color coordinates, or within a chrominance error range (±4?E*ab±2?E*ab) locus from the constant hue locus of each of AdobeRGB color coordinates.Type: GrantFiled: April 17, 2014Date of Patent: December 30, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Seoung-Jae Im, Seo-Young Choi, Eun-Joo Jang
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Patent number: 8908124Abstract: A light guide plate for a backlight unit of a liquid crystal display device includes one side surface where light from a first light source is incident; the other side surface opposite to the one side surface; a front surface combining the one and the other one side surfaces; and a rear surface including a plurality of light guide patterns, each of the plurality of light guide patterns including a protruding portion and a groove portion, wherein one of the protruding portion and the groove portion is positioned at a center of the other one of the protruding portion and the groove portion.Type: GrantFiled: July 28, 2010Date of Patent: December 9, 2014Assignee: LG Display Co., Ltd.Inventors: Sang-Hyun Lee, Byoung-Ku Kim, Won Taek Moon, Young-Ik Hwang
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Patent number: 8902379Abstract: Disclosed are a display device and a method for manufacturing an optical member. The display device includes a light source; a plurality of wavelength conversion particles to convert a wavelength of a light generated from the light source; and a tube to receive the wavelength conversion particles, wherein a scattering pattern is formed on at least one surface of the tube.Type: GrantFiled: October 14, 2011Date of Patent: December 2, 2014Assignee: LG Innotek Co., Ltd.Inventor: Seung Ryong Park
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Patent number: 8885120Abstract: A color Liquid Crystal display (LCD) device for displaying a color image using at least four different primary colors, the device including an array of Liquid Crystal (LC) elements, driving circuitry adapted to receive an input corresponding to the color image and to selectively activate the LC elements of the LC array to produce an attenuation pattern corresponding to a gray-level representation of the color image, and an array of color sub-pixel filter elements juxtaposed and in registry with the array of LC elements such that each color sub-pixel filter element is in registry with one of the LC elements, wherein the array of color sub-pixel filter elements comprises at least four types of color sub-pixel filter elements, which transmit light of the at least four primary colors, respectively.Type: GrantFiled: April 15, 2008Date of Patent: November 11, 2014Assignee: Genoa Color Technologies Ltd.Inventors: Ilan Ben-David, Shmuel Roth, Moshe Ben-Chorin
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Patent number: 8879019Abstract: 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: GrantFiled: August 2, 2012Date of Patent: November 4, 2014Assignee: Seiko Epson CorporationInventors: Nobutaka Urano, Yoichi Momose
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Patent number: 8860653Abstract: 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: GrantFiled: September 1, 2010Date of Patent: October 14, 2014Assignee: Apple Inc.Inventors: Peter H. Mahowald, Ulrich T. Barnhoefer
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Publication number: 20140300843Abstract: 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: ApplicationFiled: January 21, 2013Publication date: October 9, 2014Inventors: Che-chang Hu, Hu He
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Patent number: 8850714Abstract: A chromaticity correction device corrects chromaticity of a video signal displayed on a display panel of a display device to correspond to a change in a luminance value of the display panel. The chromaticity correction device includes a luminance detection unit which detects the luminance value, a backlight driving level detection unit which detects a backlight driving level, a temperature detection unit which detects an internal device temperature or an ambient temperature, a reference luminance value calculation unit which estimates a reference luminance value in a characteristic of an initial state, a chromaticity calculation unit which obtains a chromaticity change amount of white point chromaticity and estimated white point chromaticity that is an estimated value of current white point chromaticity, a chromaticity correction value calculation unit which obtains a chromaticity correction value and a chromaticity correction circuit which corrects the chromaticity of the video signal.Type: GrantFiled: September 30, 2011Date of Patent: October 7, 2014Assignee: NEC Display Solutions, Ltd.Inventor: Katsuyuki Matsui
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Patent number: 8842234Abstract: 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: GrantFiled: March 16, 2012Date of Patent: September 23, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventor: Yajun Yu
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Patent number: 8842238Abstract: 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: GrantFiled: November 19, 2010Date of Patent: September 23, 2014Assignee: LG Display Co., Ltd.Inventors: Hee Kyung Lee, Byoung Ku Kim, Jun Ho Bae, Yong Ik Hwang
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Patent number: 8836890Abstract: 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: GrantFiled: October 8, 2010Date of Patent: September 16, 2014Assignee: Samsung Display Co., Ltd.Inventors: Sangwook Lee, Doowon Lee
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Patent number: 8823900Abstract: 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: GrantFiled: June 17, 2011Date of Patent: September 2, 2014Assignee: Seiko Epson CorporationInventor: Takehiko Kubota
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Patent number: 8823632Abstract: 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: GrantFiled: November 26, 2007Date of Patent: September 2, 2014Assignee: Cheil Industries, Inc.Inventors: Chul Goo Chi, Sung Hyun Joo, O Yong Jeong, Jae Han Kim, Man Suk Kim
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Patent number: 8810528Abstract: 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: GrantFiled: December 27, 2010Date of Patent: August 19, 2014Assignee: QUALCOMM MEMS Technologies, Inc.Inventors: Ion Bita, Stephen P. Dhanens, Evgeni P. Gousev, Kollengode S. Narayanan
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Patent number: 8804067Abstract: 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: GrantFiled: September 24, 2011Date of Patent: August 12, 2014Assignees: 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
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Patent number: 8804066Abstract: A backlight unit has a light source area. The width of the light source area in a first direction is shorter than the width of a liquid crystal panel in the first direction. A plurality of LED modules (31) are arranged along the second direction perpendicular to the first direction. End lenses (41A, 41B) and a middle lens (42) for enlarging a light divergence angle are disposed on the plurality of LED modules (31). The direction in which the end lens (41A, 41B) enlarges the light divergence angle differs from that in which the middle lens (42) enlarges the divergence angle. This structure can reduce difference in brightness of the liquid crystal panel, while reducing the number of light sources.Type: GrantFiled: October 18, 2011Date of Patent: August 12, 2014Assignee: Panasonic Liquid Crystal Display Co., Ltd.Inventors: Ikuko Imajo, Sachiko Yamazaki, Kikuo Ono
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Patent number: 8798425Abstract: 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: GrantFiled: November 22, 2011Date of Patent: August 5, 2014Assignee: Qualcomm MEMS Technologies, Inc.Inventors: Ion Bita, Gang Xu, Lai Wang, Marek Mienko, Russell Wayne Gruhlke
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Patent number: 8780085Abstract: 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: GrantFiled: August 3, 2010Date of Patent: July 15, 2014Assignee: Microsoft CorporationInventors: Adrian Travis, Timothy Large
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Patent number: 8773612Abstract: A light emitting module (1) comprises a module substrate (2), a light emitting diode string (31), and a sealing member (48). The light emitting diode string (31) includes light emitting diode elements (32) and bonding wires (37) which connect the light emitting diode elements (32). The light emitting diode element (32) has a pair of element electrodes (33, 34) and has a rectangular shape extending in a direction along which the element electrodes (33, 34) are aligned. The sealing member (48) is laminated on the module substrate (2) to seal the light emitting diode string (31). The light emitting diode elements (32) are arranged at intervals in a direction crossing the direction along which the element electrodes (33, 34) are aligned, and the element electrodes (33, 34) with the same polarity are aligned to be adjacent to each other in an arrangement direction of the light emitting diode elements (32) between the light emitting diode elements (32) adjacent to each other.Type: GrantFiled: February 26, 2010Date of Patent: July 8, 2014Assignee: Toshiba Lighting & Technology CorporationInventors: Tomohiro Sanpei, Kiyoshi Otani, Masahiro Izumi, Junya Murata, Akiko Saito, Yumiko Hayashida
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Patent number: 8743316Abstract: 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: May 7, 2013Date of Patent: June 3, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Myung-ryul Jung, Do-hyeon Baek, Kil-hong Lee, Hyeong-sik Choi
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Patent number: 8733959Abstract: 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: September 12, 2012Date of Patent: May 27, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Koji Moriya, Takeshi Nishi
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Patent number: 8702277Abstract: 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: GrantFiled: July 11, 2011Date of Patent: April 22, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Seoung-Jae Im, Seo-Young Choi, Eun-Joo Jang
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Patent number: 8698977Abstract: 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: GrantFiled: December 8, 2009Date of Patent: April 15, 2014Assignee: Sharp Kabushiki KaishaInventors: Hiroaki Shigeta, Naru Usukura
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Patent number: 8690407Abstract: 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: GrantFiled: August 6, 2012Date of Patent: April 8, 2014Assignee: Hitachi Consumer Electronics Co., Ltd.Inventors: Mikio Shiraishi, Masayuki Tanabe, Mika Tanimura, Shoji Yamamoto, Kenji Takano, Yoshifumi Shimane, Yasuaki Ohara, Reiji Nakamura
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Patent number: 8687139Abstract: 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: GrantFiled: December 8, 2009Date of Patent: April 1, 2014Assignee: LG Display Co., Ltd.Inventors: Min Gyu Lee, Jin Man Bae
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Patent number: 8668373Abstract: 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: GrantFiled: March 3, 2013Date of Patent: March 11, 2014Assignee: AU Optronics CorporationInventors: Yung Chih Liu, Chih-Shun Fan, Yu-Sen Jang
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Patent number: 8646932Abstract: 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: GrantFiled: June 14, 2011Date of Patent: February 11, 2014Assignee: LG Innotek Co., Ltd.Inventors: Kum Tae Lee, Moon Jeong Kim, Duk Hyun Yun
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Patent number: 8643804Abstract: 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: GrantFiled: December 18, 2012Date of Patent: February 4, 2014Assignee: LG Electronics Inc.Inventors: Hyunkwon Shin, Sangcheon Kim, Moongoo Choi, Seongman Jeon, Hyunho Lee, Joodo Park, Ilhwan Kim
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Patent number: 8643807Abstract: 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: GrantFiled: September 21, 2011Date of Patent: February 4, 2014Assignee: Samsung Display Co., Ltd.Inventors: Joo-Young Lee, Won-Il Lee
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Patent number: 8636373Abstract: 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: GrantFiled: July 26, 2012Date of Patent: January 28, 2014Assignee: Minebea Co., Ltd.Inventor: Toru Kunimochi
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Patent number: 8629968Abstract: 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: GrantFiled: January 12, 2012Date of Patent: January 14, 2014Assignee: Kyungpook National University Industry-Academic CooperationInventors: Hak Rin Kim, Yong Hun Kim
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Patent number: 8616755Abstract: 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: GrantFiled: September 15, 2011Date of Patent: December 31, 2013Assignee: Toray Advanced Materials Korea Inc.Inventors: Sang Pil Kim, Chang Ik Hwang, Hee Cheong Lee, Sang Hoon Lee, Jun Sang Park, Kwang Soo Kim
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Publication number: 20130335673Abstract: 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: ApplicationFiled: February 29, 2012Publication date: December 19, 2013Applicant: SHARP KABUSHIKI KAISHAInventor: Hiroyuki Moriwaki
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Patent number: 8596846Abstract: 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: GrantFiled: March 16, 2012Date of Patent: December 3, 2013Assignee: Nano-Optic Devices, LLCInventors: Vladimir Yankov, Alexander Goltsov, Igor Ivonin, Leonid Velikov
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Patent number: 8582045Abstract: 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: GrantFiled: November 24, 2008Date of Patent: November 12, 2013Assignee: LG Display Co., Ltd.Inventors: Won-Seok Kang, Jong-Beom Lee
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Patent number: 8576352Abstract: 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: GrantFiled: August 2, 2010Date of Patent: November 5, 2013Assignees: Tsinghua University, Hon Hai Precision Industry Co., Ltd.Inventors: Jun Zhu, Yan Zhao, He Zhang, Guo-Fan Jin
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Patent number: 8567977Abstract: 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: GrantFiled: February 20, 2008Date of Patent: October 29, 2013Assignee: Koninklijke Philips N.V.Inventors: Fetze Pijlman, Giovanni Cennini
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Patent number: 8564738Abstract: 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: GrantFiled: December 21, 2011Date of Patent: October 22, 2013Assignee: LG Innotek Co., Ltd.Inventors: Sang-Youl Lee, So Jung Kim, June O Song, Kwang Ki Choi
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Patent number: 8564739Abstract: A LCD system including multiple light sources optically coupled through different light entry regions to at least one waveguide element positioned to backlight a LCD panel. A LCD system including multiple light sources coupled to light entry regions of two or more waveguides comprising a waveguide system positioned to backlight a LCD panel. Waveguides of various configurations and promoting even lighting of associated LCD panels are provided. Resulting LCD systems enable uniformly lit panels having diagonal measurements in excess of 12 to 14 inches, but the invention is not limited to panels of any particular size.Type: GrantFiled: January 3, 2011Date of Patent: October 22, 2013Assignee: Cree, Inc.Inventors: Nicholas W. Medendorp, Jr., Norbert Hiller, Russell G. Villard
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Patent number: 8564742Abstract: A LCD system including multiple light sources optically coupled through different light entry regions to at least one waveguide element positioned to backlight a LCD panel. A LCD system including multiple light sources coupled to light entry regions of two or more waveguides comprising a waveguide system positioned to backlight a LCD panel. Waveguides of various configurations and promoting even lighting of associated LCD panels are provided. Resulting LCD systems enable uniformly lit panels having diagonal measurements in excess of 12 to 14 inches, but the invention is not limited to panels of any particular size.Type: GrantFiled: July 15, 2011Date of Patent: October 22, 2013Assignee: Cree, Inc.Inventors: Nicholas W. Medendorp, Jr., Norbert Hiller, Russell G. Villard
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Patent number: 8564737Abstract: A LCD system including multiple light sources optically coupled through different light entry regions to at least one waveguide element positioned to backlight a LCD panel. A LCD system including multiple light sources coupled to light entry regions of two or more waveguides comprising a waveguide system positioned to backlight a LCD panel. Waveguides of various configurations and promoting even lighting of associated LCD panels are provided. Resulting LCD systems enable uniformly lit panels having diagonal measurements in excess of 12 to 14 inches, but the invention is not limited to panels of any particular size.Type: GrantFiled: September 9, 2011Date of Patent: October 22, 2013Assignee: Cree, Inc.Inventors: Nicholas W. Medendorp, Jr., Norbert Hiller, Russell G. Villard
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Patent number: 8558969Abstract: 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: GrantFiled: August 4, 2008Date of Patent: October 15, 2013Assignees: Innocom Technology (Shenzhen) Co., Ltd., Chimei Innolux CorporationInventors: Yi Xu, Ching-Huang Lin
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Patent number: 8553176Abstract: 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: December 19, 2012Date of Patent: October 8, 2013Assignee: Sharp Kabushiki KaishaInventors: Yoshitaka Matsui, Yoshiyuki Kawagoe