Having Solid-state Light Source Patents (Class 362/97.3)
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Patent number: 8807772Abstract: Embodiments relate to a backlight unit, a display device therewith, and a lighting system therewith, the backlight unit including a first reflector and a second reflector, at least one light source disposed between the first reflector and the second reflector, an upper cover plate and a lower cover plate separate from each other, and a heat dissipation unit for holding the light source and being disposed between the upper cover plate and the lower cover plate to dissipate heat from the light source.Type: GrantFiled: February 8, 2012Date of Patent: August 19, 2014Assignee: LG Innotek Co., Ltd.Inventor: Tae Hoon Kim
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Publication number: 20140226312Abstract: Provided is a light unit including a plurality of LED light sources formed on a PCB, a resin layer stacked on the PCB to diffuse and guide emitted light forwards, and a diffusion plate having an optical pattern printed thereon to shield light emitted from the LED light sources. The optical pattern is composed of a diffusion pattern implemented as at least one layer, or a combination of the diffusion pattern layer and a light shielding pattern. The light unit forms an optical pattern for shielding or diffusing light on a surface of a light diffusion plate of the back-light unit, and combines a diffusion pattern and a metal pattern to attain uniformity of light and realize a yellow-light shielding effect, thus leading to a reliable light quality.Type: ApplicationFiled: September 9, 2011Publication date: August 14, 2014Applicant: LG INNOTEK CO., LTD.Inventors: Kwang Ho Park, Woo Young Chang, Chul Hong Kim, Byoung Eon Lee
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Publication number: 20140226102Abstract: The present invention provides a direct backlight module and a liquid crystal display module using the backlight module. The backlight module includes a backplane, a diffusion platen arranged inside the backplane, and backlight sources mounted to the backplane and located under the diffusion plate. The backplane includes a bottom board and side boards connected to the bottom board. The bottom board forms receiving openings. The backlight sources are mounted to a side of the bottom board that is distant from the diffusion plate to correspond to the receiving openings. With the backplane having a bottom board that includes a circumferential frame and braces collectively defining receiving openings and backlight sources being mounted to a side of the bottom board that is distant from a diffusion plate to correspond to the receiving openings, it only need to remove the backlight sources in maintaining or replacing the backlight sources.Type: ApplicationFiled: November 20, 2012Publication date: August 14, 2014Applicant: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventor: Yanxue Zhang
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Patent number: 8801209Abstract: A backlight assembly and a display device having the same are provided. The backlight assembly includes a first substrate, point light sources disposed upon the first substrate and an optical member covering the point light sources to guide light emitted from the point light sources, wherein the first substrate has recessed portions, and the point light sources are positioned within the recessed portions.Type: GrantFiled: September 14, 2011Date of Patent: August 12, 2014Assignee: Samsung Display Co., Ltd.Inventors: Hyun-Deok Im, Byoung-Ho Cheong, Young-Chan Kim, Seung-Won Park
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Patent number: 8801210Abstract: Provided is a backlight device having: a light source element having light emitting diodes and a lens expanding light from the light emitting diodes; a housing containing the light source element; a diffuser plate covering an opening portion of the housing; and a reflection sheet reflecting light emitted from the light source element, toward the diffuser plate. In the light source element, a plurality of the lenses are arranged at a central zone, the plurality of lenses being arranged in a plurality of rows.Type: GrantFiled: September 14, 2012Date of Patent: August 12, 2014Assignee: Panasonic CorporationInventors: Daizaburo Matsuki, Katsuhiko Hayashi, Kenji Hasegawa, Hiroshi Yamaguchi
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Patent number: 8801261Abstract: Disclosed is a backlight unit in order to suppress an increase of time needed for manufacture and generation of operation variance, and furthermore, to suppress deterioration and unevenness of luminance of output light. A plurality of transparent light guide plates (5), which are disposed in a chassis (4) in the lateral direction, and which output light emitted from a light source (7), are provided with a fixing protruding section (51) which is to be pressed by a fixing member (6), and an outputting section (52), which outputs planar light. The outputting section (52) is provided with, when viewed from the front, an extending section (53) which extends to cover at least a part of the fixing protruding section (51).Type: GrantFiled: May 10, 2011Date of Patent: August 12, 2014Assignee: Sharp Kabushiki KaishaInventor: Akira Gotou
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Patent number: 8801207Abstract: A light directing substrate includes a back major surface and a front major surface opposing the back surface. The back major surface includes light reflection regions and light transmission regions. The front surface includes a plurality of lenticular lens elements. A graphic image disposed on or in the light directing substrate.Type: GrantFiled: December 16, 2010Date of Patent: August 12, 2014Assignee: 3M Innovative Properties CompanyInventors: Michael A. Meis, David G. Freier, Patrick R. Fleming, Ronald S. Steelman
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Patent number: 8803169Abstract: A liquid crystal display device includes a liquid crystal display panel, and a backlight unit. The backlight unit includes a plurality of light emitting diodes each having an anode and a cathode, and first adjacently and disposed substrates. The plurality of light emitting diodes are mounted on the first substrate and the second substrate and arranged in a plurality of rows. A first light emitting diode mounted on the first substrate and a second light emitting diode mounted on the second substrate which are adjacent across a boundary between the first substrate and the second substrate are disposed so that respective anodes of the first and second light emitting diodes are opposed to each other and have a pitch equal to or smaller than a pitch of other light emitting diodes mounted on the first and second substrates.Type: GrantFiled: November 27, 2013Date of Patent: August 12, 2014Assignees: Japan Display Inc., Panasonic Liquid Crystal Co., Ltd.Inventors: Masashi Baba, Ikuko Imajo, Isao Matsuda
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Patent number: 8797475Abstract: An object of the present invention is to reduce its tendency to generate local deformation in an extending member of a backlight unit. A backlight unit 12 according to the present invention includes LEDs 17 as light sources, a chassis 14 storing the LEDs 17, a reflection sheet 21 and an LED substrate 18 that are extending members along an inner surface of the chassis 14, a holding member 20 fixed to the chassis 14 and holding the reflection sheet 21 and the LED substrate 18 with the chassis 14 such that the reflection sheet 21 and the LED substrate 18 are sandwiched between the holding member 20 and the chassis 14, and a restricting part 26 restricting positional relationship of the holding member 20 with respect to the reflection sheet 21 and the LED substrate 18 such that a gap C is provided between the holding member 20 and the reflection sheet 21.Type: GrantFiled: April 6, 2010Date of Patent: August 5, 2014Assignee: Sharp Kabushiki KaishaInventor: Yasumori Kuromizu
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Patent number: 8797253Abstract: In an LCD device, picture quality luminance is controlled through the combination of pulse-width modulation (PWM) system and current value control system, reducing the electrical power consumption associated with turning on an LED. In the LED backlight, the light emitting luminance of the LED is controlled by both PWM and also by current value control, which selects the value of the current supplied to the LED from a plurality of set values. At least one of the plurality of set values is a predetermined current value at which duty reaches a maximum value at the maximum luminance value used in a specified picture quality mode of the picture quality modes established in the liquid crystal display device. In the aforementioned specified picture quality mode, the greatest luminance value to be used is smaller than at least the greatest luminance value used in other specified picture quality modes.Type: GrantFiled: July 6, 2010Date of Patent: August 5, 2014Assignee: Sharp Kabushiki KaishaInventors: Kohji Iwasaki, Motoyuki Oniki
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Patent number: 8797481Abstract: Provided is a liquid crystal display device, including: a light guide plate; first light-emitting diodes and a first connector, which are opposed to a first side surface of the light guide plate; a first substrate on which the first light-emitting diodes and the first connector are mounted; second light-emitting diodes and a second connector, which are opposed to a second side surface of the light guide plate, the second side surface being on a side opposite to the first side surface; and a second substrate on which the second light-emitting diodes and the second connector are mounted, in which: the first connector is opposed to any one of the second light-emitting diodes; the second connector is opposed to any one of the first light-emitting diodes; and the first connector and the second connector are disposed without being opposed to each other.Type: GrantFiled: April 4, 2011Date of Patent: August 5, 2014Assignees: Japan Display Inc., Panasonic Liquid Crystal Display Co., Ltd.Inventors: Shimon Itakura, Masaki Tsubokura
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Publication number: 20140211454Abstract: Exemplary embodiments provide a lighting system for a transparent LCD having opposing vertical edges, the system having a mullion lighting assembly positioned adjacent to each vertical edge of the transparent LCD, each mullion lighting assembly having sidewalls defining a center channel. A plurality of LEDs are positioned along the sidewall of each mullion assembly and on a side of the sidewall that opposes the center channel. The LEDs are preferably placed in conductive thermal communication with the sidewall and preferably have a quantum dot film positioned over each LED. A fan is preferably positioned to draw cooling air through the center channel.Type: ApplicationFiled: March 31, 2014Publication date: July 31, 2014Applicant: Manufacturing Resources International, Inc.Inventors: William Dunn, Harry Presley, Mike Brown, Chris Tran
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Patent number: 8789961Abstract: A direct-type LED backlight module includes a supporting base having a supporting face, an LED mounted on the supporting face of the supporting base, and a dome-like light guiding cover positioned on the supporting face of the supporting base and covering the LED. The light guiding cover defines a plurality of through holes for permitting light emitted from the LED to pass through light guiding cover. The through holes are spaced from each other and arranged in a number of imaginary concentric circles relative to a center of the light guiding cover. An inner face of the light guiding cover facing the LED is coated with a reflective film. A semispherical light reflecting portion protrudes downwardly from an inner face of a top portion of the light guiding cover towards the LED.Type: GrantFiled: March 5, 2013Date of Patent: July 29, 2014Assignee: Hon Hai Precision Industry Co., Ltd.Inventor: Li-Ying Wang He
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Patent number: 8789960Abstract: A backlight unit (49) of a display device (69) having a liquid crystal display panel (59) is provided with a chassis (41), a diffusion plate (43) supported by the chassis, and a light source which irradiates the diffusion plate with light. The light source is constructed by combining a plurality of mounting substrates (21) provided with an LED (22) which serves as the light-emitting element and a diffusion lens (24) for covering the LED. Connectors (25A) are mounted on matching edges of the plurality of mounting substrates to electrically connect the substrates. The connectors are placed so as not to interfere with the illumination light region in which the LED imparts brightness to the diffusion plate. In order to achieve this state of non-interference, a beveled part (26) is formed on the side of the connectors facing the LED.Type: GrantFiled: February 17, 2010Date of Patent: July 29, 2014Assignee: Sharp Kabushiki KaishaInventor: Masashi Yokota
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Patent number: 8785960Abstract: In accordance with certain embodiments, semiconductor dies are embedded within polymeric binder to form, e.g., light-emitting dies and/or composite wafers containing multiple light-emitting dies embedded in a single volume of binder.Type: GrantFiled: March 24, 2014Date of Patent: July 22, 2014Assignee: Cooledge Lighting Inc.Inventor: Michael A. Tischler
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Patent number: 8786643Abstract: An edge-lit display having a front modulator in the top layer of an optical package and an extractor in at least one of the top and bottom layers. A control system is connected to control the extraction mechanism to project light which approximates a desired image onto the front modulator, estimate a pattern of light incident on the front modulator, and control the front modulator based on the estimated pattern.Type: GrantFiled: July 6, 2010Date of Patent: July 22, 2014Assignee: Dolby Laboratories Licensing CorporationInventor: Helge Seetzen
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Patent number: 8777437Abstract: A light-emitting module includes a substrate having a first surface and a second surface, at least one light-emitting device disposed on the first surface of the substrate, and an optical reflection layer disposed on the first surface of the substrate and surrounding the light-emitting device for receiving a portion of light emitted from the light-emitting device and reflecting the portion of light. The substrate can be rigid or flexible.Type: GrantFiled: March 11, 2008Date of Patent: July 15, 2014Assignee: Industrial Technology Research InstituteInventors: Zhi-Cheng Hsiao, Chao-Kai Hsu, Yu-Hua Chen
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Patent number: 8777438Abstract: A direct type backlight unit includes an optical film, a diffusion plate for supporting the optical film, a bottom plate disposed under the diffusion plate, a plurality of light emitted diodes disposed between the diffusion plate and the bottom plate, and a plurality of support structures disposed between the diffusion plate and the bottom plate and fixed on the bottom plate, wherein each support structure is disposed between two adjacent light emitting diodes, a height of each support structure is smaller than a distance between the bottom plate and the diffusion plate. The direct type backlight unit can improve the problem that a dark area occurs on the diffusion plate.Type: GrantFiled: August 2, 2012Date of Patent: July 15, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventors: Kuang-Yao Chang, Zan-Jia Su
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Patent number: 8780296Abstract: A display device including a display panel which displays images, an intermediate frame on which the display panel is seated, a lower receptacle which includes a first receiving portion including a bottom plate and sidewalls, and a second receiving portion separate from the first receiving portion, and a light source unit which includes an alignment plate and a point light source mounted on the alignment plate. The light source unit contacts the sidewalls of the lower receptacle, and the first receiving portion is coupled with the intermediate frame.Type: GrantFiled: August 12, 2010Date of Patent: July 15, 2014Assignee: Samsung Display Co., Ltd.Inventors: Chang-Hoi Kim, Jung-Soo Ok, Choong-Yull Kwak, Yong-Woo Kim, Kyu-Hun Lim, Hyo-Chul Lee
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Patent number: 8773611Abstract: Disclosed is a backlight device comprising: a light emitting section including a plurality of surface light emitters which are arranged and disposed so as to have a predetermined gap; and a diffuser plate which is disposed in front of the light emitting section to diffuse a light irradiated from the light emitting section, wherein an angle between two light irradiation surfaces in the adjacent surface light emitters is smaller than 180 degrees.Type: GrantFiled: May 6, 2009Date of Patent: July 8, 2014Assignee: Funai Electric Co., Ltd.Inventor: Hiroshi Yamashita
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Patent number: 8770788Abstract: A novel structure of a backlight unit where color-scan backlight drive is performed and a color mixture problem can be reduced is proposed. In the backlight unit where color-scan backlight drive is performed, in order not to form a color mixture region by light from a light source, an optical system is provided between the light source and a diffuser sheet so that the light is isotropically spread. Specifically, the distribution of intensity of light in the minor-axis direction is narrowed by the optical system provided between the light source and the diffuser sheet. The distribution of intensity of light in the major-axis direction is made uniform by the optical system. Further, the spread of light from the light source in the minor-axis direction in which a color mixture region is formed is suppressed and luminance on a light-emitting surface in the major-axis direction is made uniform.Type: GrantFiled: October 19, 2011Date of Patent: July 8, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Hidekazu Miyairi
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Patent number: 8770773Abstract: A light source device capable of suppressing generation of color unevenness, and a display device using the same are provided. The light source device 1 is provided with a plurality of excitation light sources 11 which are arranged at prescribed intervals D on a substrate 10 and emit blue light, and a phosphor layer 12 which converts part of the blue light emitted from the excitation light sources into red light and green light and arranged at a distance from the excitation light sources 11 to oppose the substrate 10. Fluctuation of intensity of each color light due to nonuniform application of the phosphor layer is difficult to occur as compared with a configuration in the past where the phosphor layer is formed adjacent to each excitation light source.Type: GrantFiled: November 27, 2008Date of Patent: July 8, 2014Assignee: Dexerials CorporationInventors: Tetsuyuki Yoshida, Shozo Masuda, Naoji Nada, Yasushi Ito, Tsubasa Tsukahara
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Publication number: 20140185274Abstract: An encapsulating composition for a light emitting element, a light emitting diode (LED) and a liquid crystal display device (LCD) are provided. A silicone-cured product included as a main ingredient and a conductivity-providing agent having excellent compatibility and capable of providing superior conductivity can be used to significantly reduce the surface resistivity of the silicone-cured product. Therefore, the encapsulating composition for a light emitting element, the LED and the LCD can be useful in solving the problems regarding attachment of a foreign substance such as dust due to static electricity, and degradation of transparency since the composition has low surface resistivity when used as a semiconductor encapsulation material for an LED, and also in providing a cured product having excellent properties such as light resistance, heat resistance, durability and optical transparency.Type: ApplicationFiled: March 7, 2014Publication date: July 3, 2014Applicant: LG CHEM, LTD.Inventors: Sang Ki CHUN, In Seok HWANG, Dong-Wook LEE, Ji Young HWANG
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Patent number: 8764212Abstract: Provided is a backlight unit including a plurality of light emitting diodes (LEDs) that emit light; a plurality of LED modules having a printed circuit board (PCB) which supports and drives the plurality of LEDs; a plurality of optical sheets that are attached to the top surfaces of the respective LED modules; and a plurality of heat radiating pads that are attached to the rear surfaces of the respective LED modules.Type: GrantFiled: March 9, 2009Date of Patent: July 1, 2014Assignee: Samsung Electronics Co., Ltd.Inventors: Dae Yeon Kim, Young June Jeong, Hun Joo Hahm, Jae Hong Shin, Chang Ho Shin
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Publication number: 20140177208Abstract: A lens includes an incident surface and a light output surface. A plurality of light diverging portions is arranged on the light output surface and around a center of the light output surface. The light diverging portions each are a ring and are spaced from each other. An inner light diverging portion has a refraction angle larger than that of an outer light diverging portion. Light emitted into the lens from the incident surface is diffused by the light output surface and the light diverging portions to radiate out of the lens. A cross section of each light diverging portion has a shape of a triangle. The present disclosure also relates a backlight module using the lens.Type: ApplicationFiled: September 5, 2013Publication date: June 26, 2014Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: I-THUN LIN
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Patent number: 8759125Abstract: In accordance with certain embodiments, semiconductor dies are embedded within polymeric binder to form, e.g., freestanding white light-emitting dies and/or composite wafers containing multiple light-emitting dies embedded in a single volume of binder.Type: GrantFiled: January 24, 2013Date of Patent: June 24, 2014Assignee: Cooledge Lighting Inc.Inventor: Michael A. Tischler
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Patent number: 8760613Abstract: A system for powering an LED backlight where power assemblies have electrical communications ran through pass through apertures in a mounting plate and LED backlight panel. A channel may be defined between the mounting plate and the LED backlight panel (or optional thermal plate attached to the rear portion of the LED backlight panel). Sub-channels can be created within the channel which are defined by ribs which connect between the mounting plate and the LED backlight panel (or optional thermal plate attached to the rear portion of the LED backlight panel). Cooling air can be prevented from entering one or more specific sub-channels so that electrical connections can pass through the mounting plate, LED backlight panel, and sub-channel without the risk of cooling air contaminates entering one of the pass through apertures.Type: GrantFiled: October 29, 2010Date of Patent: June 24, 2014Assignee: Manufacturing Resources International, Inc.Inventor: William Dunn
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Patent number: 8757829Abstract: An embodiment of the disclosed technology discloses a backlight source and a display device. The backlight source including a back plate, an optical film, a light source bracket located between the back plate and the optical film, and a light source mounted onto the light source bracket; the light emitted from the light source is radiated toward the optical film after being reflected by the back plate.Type: GrantFiled: May 17, 2012Date of Patent: June 24, 2014Assignee: BOE Technology Group Co., Ltd.Inventors: Yan Wei, Heecheol Kim, Chunfang Zhang
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Publication number: 20140168949Abstract: The present invention provides a direct type backlight and a display device provided with the direct type backlight. The direct type backlight includes: a backplate; a printed circuit board fixed on the backplate; a number of LED lamp units fixed on the printed circuit board; side frames fixed on inner side walls of the backplate; reflection sheets covering inner wall of cavity formed by the printed circuit board and the side frames, said reflection sheets have lamp holes matching the LED lamp units; outer frames fixed on upper sides of the backplate and the side frames; said direct type backlight further including: a silica gel light guide plate which this the cavity formed by the printed circuit board and the side frames to cover the reflection sheets and the LED lamp units; and optical film disposed on upper surface of the silica gel light guide plate and located between the upper surface of the silica gel light guide plate and the outer frames.Type: ApplicationFiled: October 24, 2013Publication date: June 19, 2014Applicants: Beijing BOE Chatani Electronics Co., Ltd., BOE Technology Group Co., Ltd.Inventors: Yang Zhao, Zhendong Zhou
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Publication number: 20140160734Abstract: An LCD module includes a screen, a light diffusion plate, a first lens, a second lens and an LED. The second lens covers the first lens which in turn covers the LED. The first lens has a first fly-eye lens array formed on a light-incident face thereof and a second fly-eye lens array formed on a light-emergent face thereof. Each of the first fly-eye lens array and the second fly-eye lens array includes multiple convex micro-lenses. The second lens is a light diffusion lens. Light emitted from the LED is diffused by the first lens and the second lens to uniformly illuminate the screen through the light diffusion plate.Type: ApplicationFiled: January 24, 2013Publication date: June 12, 2014Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventors: TAI-CHERNG YU, I-THUN LIN
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Patent number: 8748929Abstract: In accordance with certain embodiments, semiconductor dies are embedded within polymeric binder to form, e.g., light-emitting dies and/or composite wafers containing multiple light-emitting dies embedded in a single volume of binder.Type: GrantFiled: November 20, 2013Date of Patent: June 10, 2014Assignee: Cooledge Lighting Inc.Inventor: Michael A. Tischler
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Patent number: 8746945Abstract: A backlight unit is disclosed. The backlight unit includes a light emitting device module, a reflective plate including at least two slopes configured to reflect light emitted from the light emitting device module to an optical member, and the optical member to transmit the light directed from the light emitting device module and the reflective plate. The slope located farther from the light emitting device module has a greater gradient with respect to a horizontal plane than the slope located closer to the light emitting device module.Type: GrantFiled: April 1, 2011Date of Patent: June 10, 2014Assignee: LG Innotek Co., Ltd.Inventor: Jong Wook Kim
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Patent number: 8746947Abstract: The invention provides a backlight module, an LCD device and a light source of the backlight module. The backlight module includes an LED chip, and a heat sink; the LED chip and a circuit thereof are directly arranged on the heat sink. In the invention, because the LED chip of the backlight module and the circuit thereof are directly arranged on the heat sink, heat emitted by the LED chip can be conducted out through the heat sink with good heat dissipation effect; thus, the inside temperature of the backlight module is reduced, and the heat dissipation efficiency of the backlight module is increased.Type: GrantFiled: April 5, 2012Date of Patent: June 10, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventors: Yajun Yu, Quan Li
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Patent number: 8746952Abstract: In an illumination apparatus, a plurality of light-emitting elements are mounted to one surface (a first surface) of a light source substrate. The light source substrate is anchored to a substrate support portion using a screw that is tightened down into the substrate support portion from the opposite side as the light source substrate. Meanwhile, the light source substrate includes a metallic plate that configures another surface (a second surface) and a flexible wiring board that is affixed to the metallic plate on the side of the one surface (the first surface), and a through-hole that passes through the metallic plate is formed, as the hole for tightening down the screw, in the location of the light source substrate in which the screw is tightened.Type: GrantFiled: July 19, 2012Date of Patent: June 10, 2014Assignee: Seiko Epson CorporationInventors: Nobutaka Urano, Yoichi Momose
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Patent number: 8746931Abstract: Light incoupling structures for lighting applications, such as lightguides, are described herein. The incoupling structures include an optically substantially transparent medium for transporting light emitted by a light source and an optical element including at least one hole in the medium for coupling light together with optional further optical elements. A lighting element includes a light source with related integrated optics.Type: GrantFiled: October 20, 2011Date of Patent: June 10, 2014Assignee: Modilis Holdings LLCInventor: Kari J. Rinko
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Publication number: 20140153223Abstract: An LCD module includes a screen, a light diffusion plate, a lens and an LED. The lens covers the LED. The lens includes a main body having a bottom face and a top face opposite to the bottom face. The bottom face of the main body defines a cavity to receive the LED. The top face of the main body forms a plurality of concentric annuluses thereon. Each annulus has a first face perpendicular to the top face of the main body, and a second face inclined relative to the top face of the main body, to thereby diverge a part of light from the LED and into the lens. A central area of the top face of the main body is surrounded by an innermost annulus, and forms a rough face for diffusion another part of the light from the LED into the lens.Type: ApplicationFiled: January 24, 2013Publication date: June 5, 2014Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventor: I-THUN LIN
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Patent number: 8733960Abstract: A backlight for a display comprises a plurality of independently controllable light sources and inclined surfaces inclining in a radially outward direction from each light source for shaping the distribution of emitted light. The light sources may each comprise a group of differently-colored light emitters. The backlight may include light integrators configured to mix light of the differently-colored light emitters. Inclined surfaces for shaping the distribution of emitted light may be arranged around exits of the light integrators.Type: GrantFiled: April 9, 2013Date of Patent: May 27, 2014Assignee: Dolby Laboratories Licensing CorporationInventors: Helge Seetzen, Lorne A. Whitehead, Gregory John Ward
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Patent number: 8733970Abstract: A lighting apparatus may include a case, a circuit board, a light source including a light emitting diode (LED), and a light controlling layer to reflect light from the light source toward an inside of the case to prevent the light from being directly radiated to an outside of the case.Type: GrantFiled: September 15, 2011Date of Patent: May 27, 2014Assignee: LG Electronics Inc.Inventors: Kyunghyun Kim, Siyoung Kim, Sangcheon Kim, Hankyu Cho
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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: 8727553Abstract: In a lighting device 12 according to the present invention, a first board 20a and a second board 20b on which a plurality of light sources 17 are mounted are arranged in a first board arrangement area 30a and a second board arrangement area 30b of a chassis 14, respectively, in respective predetermined orientations. The first board 20a includes a first board-side interlock portion 31a interlocked with a first chassis-side interlock portion 32a provided in the first board arrangement area 30a, and the second board 20b includes a second board-side interlock portion 31b interlocked with a second chassis-side interlock portion 32b provided in the second board arrangement area 30b. In arranging the first board 20a in the second board arrangement area 30b, the first board-side interlock portion 31a is not interlocked with the second chassis-side interlock portion 32b.Type: GrantFiled: June 24, 2010Date of Patent: May 20, 2014Assignee: Sharp Kabushiki KaishaInventor: Nobuhiro Kasai
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Patent number: 8721150Abstract: A backlight assembly and an LCD device containing the same include a plurality of light source modules containing sequentially arranged red, green, green, blue and red LEDs. The backlight assembly can improve color realization ratio and light efficiency in an LCD device by uniform illumination of an LCD panel with color-mixed white-color light.Type: GrantFiled: November 22, 2005Date of Patent: May 13, 2014Assignee: LG Display Co., Ltd.Inventors: Jae Bum Kim, Young Mi Kim
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Patent number: 8721151Abstract: A multi-domain dynamic-driving backlight module is provided, which includes a bezel, a reflective plate, a plurality of light emitting units, and a plurality of light guide plates. The reflective plate is disposed on the bezel. The light guide plates respectively have a short side and a long side extending in a predetermined direction, wherein each of the light emitting surfaces of the light guide plates includes a plurality of patterned structures extending in a direction parallel to the light projection direction of the light emitting units. Each of the light emitting surfaces includes a patterned surface includes a plurality of patterned structures extending in a direction parallel to the light projection direction of the light emitting units.Type: GrantFiled: June 28, 2012Date of Patent: May 13, 2014Assignees: Innocom Technology (Shenzhen) Co. Ltd., Chimei Innolux CorporationInventors: Tzu-Chang Wang, Li-Wei Mao, Hui-Hung Liang
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Patent number: 8721101Abstract: The present invention relates to light emitting devices and more specifically to light emitting devices comprising light guides making use of total internal reflection (TIR). The light emitting device (100, 600) comprises a substrate (3), a plurality of light sources (2) mounted on the substrate (3) and a light guide plate (4). Reflective shielding (5) is arranged to shield the light guide plate (4) at positions were the flux of the direct light of the light sources (2) towards the light guide plate (4) have their maximum density in a powered state of the light sources (2). The reflective shielding (5) enhances the mixing of light and avoids glare problems. In-coupled is transmitted within the light guide plate (4) by total internal reflection so that light from different light sources (2) is mixed within the light guide plate (4). Further, at least a part of the lower surface is provided with an optical structure (6) for out-coupling of light.Type: GrantFiled: September 9, 2010Date of Patent: May 13, 2014Assignee: Koninklijke Philips N.V.Inventors: Petrus Adrianus Josephus Holten, Giorgia Tordini, Denis Fournier
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Patent number: 8721099Abstract: The present invention provides a back frame and a backlight system of a flat panel display device. The back frame includes at least two assembling pieces. The at least two assembling pieces are joined to form the back frame. The back frame further includes a bracing piece fixed to the assembling pieces and the bracing piece functions to fix a circuit board. The bracing piece includes a bracing body, a first suspension section, a first bearing section, and a first resilient bent section. The bracing body is fixed to the assembling pieces. The first suspension section extends from the bracing body toward one side of the bracing body. The first bearing section is spaced from the bracing body and extends from the first suspension section toward one side of the first suspension section. The first resilient bent section is located between the first bearing section and the bracing body and is bent from the first suspension section toward one side of the first suspension section.Type: GrantFiled: November 23, 2011Date of Patent: May 13, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventors: Yu-Chun Hsiao, Cheng-Wen Que, Yi-Cheng Kuo
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Patent number: 8723781Abstract: A liquid crystal display device is provided, which includes a liquid crystal element including a pixel electrode, a counter electrode, and a liquid crystal disposed between the pixel electrode and the counter electrode, a light source, a comparing circuit configured to compare a potential of the pixel electrode and a reference potential, and supply an output potential in accordance with the result of the comparison, and a control circuit configured to switch turning-on and turning-off of the light source in accordance with the output potential supplied from the comparing circuit.Type: GrantFiled: November 12, 2008Date of Patent: May 13, 2014Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Takahiro Fukutome, Takeshi Nishi
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Publication number: 20140126185Abstract: A backlight module is provided, including a first light-emitting device and a second light-emitting device. The first light-emitting device includes a first blue light LED chip and a first phosphor layer having a first color spectrum, wherein the first color spectrum has a first color spectrum area with at least 70% thereof distributed within the range from 500 nm to 580 nm. The second light-emitting device includes a second blue light LED chip and a second phosphor layer having a second color spectrum, wherein the second color spectrum has a second color spectrum area with at least 60% thereof distributed within the range from 600 nm to 680 nm. The first color spectrum has a portion within the range from 590 nm to 780 nm, and the portion has a first area smaller than or equal to 10% of the second color spectrum area.Type: ApplicationFiled: October 29, 2013Publication date: May 8, 2014Applicant: InnoLux CorporationInventors: Ming-Feng HSIEH, Shih-Chang HUANG
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Patent number: 8717277Abstract: An apparatus of approximating backlight spread is used in a display to estimate a backlight spread image corresponding to an image after backlight spreading of a plurality of backlight sources arranged in a matrix form. An equalizer receives backlight pulse width modulation signals of the backlight sources for performing an equalization operation and generating corresponding equalization signals. A backlight seed image constructor receives the equalization signals to establish a backlight seed image. A first calculation unit calculates positions corresponding to the backlight seed image based on a backlight spread image. A second calculation unit calculates coordinates of the backlight seed image corresponding to the positions. A distance calculator calculates distance differences between the positions and coordinates of the backlight seed image.Type: GrantFiled: April 11, 2012Date of Patent: May 6, 2014Assignee: Orise Technology Co., Ltd.Inventors: Chih-Kai Chang, Yu-Li Wu
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Patent number: 8714764Abstract: A light emitting module board which is compatible with a plurality of screen sizes and is used for a backlight apparatus of a liquid crystal display panel is provided. A light emitting module includes a first connector 15 and a second connector 16, each including a plurality of cathode terminals and at least one anode terminal, at each end of the board, and can be connected to another one to each other through the connectors in multi-level. A cathode wiring 14 for supplying a cathode control signal includes first cathode wirings which connect the cathode terminals of the first connector and light emitting bodies to supply a control signal to the light emitting bodies in the light emitting module, and second cathode wirings which connect the cathode terminals of the first and second connectors to supply a control signal to the light emitting bodies on a downstream light emitting module.Type: GrantFiled: February 25, 2010Date of Patent: May 6, 2014Assignee: Sharp Kabushiki KaishaInventors: Atsushi Yamashita, Hiroyuki Nabesawa, Ken Sumitani, Manabu Yumoto, Manabu Onozaki
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Patent number: 8708512Abstract: The present invention provides a backlight system, which includes an LED light source, a back frame, and a PCB. The LED light source comprises an LED lamp and an LED substrate. The LED substrate includes, sequentially stacked, a first conductor wiring layer, a first insulation layer, an aluminum substrate, a second insulation layer, and a second conductor wiring layer and the LED lamp is mounted on the first conductor wiring layer. The back frame carries the LED light source and includes at least two primary assembling pieces. The at least two primary assembling pieces are joined to form a main frame structure of the back frame. The PCB is disposed on the second conductor wiring layer of the LED substrate. The backlight system of the present invention can reduce the cost of back frame mold and save the material and space of the back frame, so as to lower down the cost of the backlight system.Type: GrantFiled: November 23, 2011Date of Patent: April 29, 2014Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.Inventors: Quan Li, Yi-Cheng Kuo, Yu-Chun Hsiao
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Patent number: 8708520Abstract: An illumination device includes a light emitting element chip and a plurality of lens array units. The light emitting element chip has a plurality of light emitting elements. Each light emitting element is a first light emitting portion provided in the light emitting element chip, or is a second light emitting portion provided at a position closer to the end portion of the light emitting element chip than the first light emitting portion. The lens array unit has a plurality of micro lenses each of which is opposed to each of the plurality of light emitting elements. Each micro lens is a first lens opposed to the first light emitting portion, or a second lens opposed to the second light emitting portion. The optical center of the first lens coincides with the geometric center thereof, and the optical center of the second lens is different from the geometric center thereof.Type: GrantFiled: April 26, 2011Date of Patent: April 29, 2014Assignee: Seiko Epson CorporationInventor: Takehiko Kubota