Incident Face Patents (Class 362/621)
  • Patent number: 10775543
    Abstract: A backlight unit includes LEDs a light guide plate, and a wavelength converter. The light guide plate includes a light entering end surface and a light exiting plate surface. The light entering end surface is at least a section of an outer peripheral end surface of the light guide plate. The light exiting plate surface is a plate surface of the light guide plate. The wavelength converter is interposed among the LEDs and the light entering end surface to extend along the length direction of the light entering end surface. The wavelength converter includes phosphors configured to wavelength-convert light. The wavelength converter is configured such that at least any one of end portions in the length direction is formed as a great light emission portion configured to emit a greater amount of wavelength-converted light per unit length in the length direction than that of a center portion.
    Type: Grant
    Filed: September 23, 2016
    Date of Patent: September 15, 2020
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masanobu Harada, Akira Gotou
  • Patent number: 10775546
    Abstract: A light guide plate includes a plate body with a first surface, a second surface opposite to the first surface, and a side surface connecting the first surface and the second surface and defining a plate thickness; a light source arranged to project light into the side surface of the light guide plate; and a plurality of microstructures arranged periodically on the first surface and indented from the first surface towards the second surface to define an indentation depth of less than half the plate thickness. Each of the light-uniformity microstructures substantially has a shape of an inverted truncated cone.
    Type: Grant
    Filed: July 12, 2018
    Date of Patent: September 15, 2020
    Assignees: LITE-ON ELECTRONICS (GUANGZHOU) LIMITED, Lite-On Technology Corporation
    Inventor: Kuan-Yu Chen
  • Patent number: 10739508
    Abstract: A light guide plate with a toothed light incident surface includes a light guide plate body. A first plate surface and a second plate surface are formed at two opposite surfaces of the light guide plate body, respectively. Micro-structure points are provided and distributed randomly and densely on the first plate surface. Among multiple side surfaces of the light guide plate body, at least one side surface is provided with a plurality of first teeth arranged sequentially in parallel. The first teeth extend along a height direction of the light guide plate body. A first groove is arranged between every two neighboring first teeth. The light incident surface is formed by the plurality of first teeth and the plurality of first grooves.
    Type: Grant
    Filed: December 22, 2017
    Date of Patent: August 11, 2020
    Assignees: NICROTEK CO., LTD., SOOCHOW UNIVERSITY
    Inventors: Heng Zhang, Zongbao Fang, Zhijian Zhu, Linsen Chen
  • Patent number: 10718891
    Abstract: An input coupler includes: a plurality of semi-reflectors located along an optical path along which a light incident from a light source travels, each of the plurality of semi-reflectors comprising a reflective surface that is inclined with respect to the optical path and configured to reflect a first portion of the light and transmit a second portion of the light; and a plurality of optical path changing members configured to change an optical path of the light transmitted through the plurality of semi-reflectors, wherein the plurality of semi-reflectors and the plurality of optical path changing members are arranged such that the light passing through at least one of the plurality of semi-reflectors and emitted in one direction has a linear beam distribution.
    Type: Grant
    Filed: January 12, 2018
    Date of Patent: July 21, 2020
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Sunghoon Lee, Joonyong Park, Dongouk Kim, Jihyun Bae, Bongsu Shin, Dongsik Shim, Jaeseung Chung
  • Patent number: 10338418
    Abstract: A light emission module includes: a light guide including emission sides disposed facing each other, a first and second side connecting the emission sides, a third side connecting the first and second side; a light source unit including a first and second light source corresponding to the first and third side respectively, and a light source substrate supporting the first and second light source and including a first and second portion supporting the first and second light source respectively, the second portion inclined at a first angle with respect to the first portion, the second light source emits a light incident on the third side comprising a first and second orientation angle edge light, the former inclined at a second angle and refracted to propagate in a path adjacent to the second side, and then refracted adjacent to the second side, the first angle smaller than the third angle.
    Type: Grant
    Filed: July 14, 2017
    Date of Patent: July 2, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Kyu-Hun Shim, Jae Sul An, Ju Hwa Ha
  • Patent number: 10067368
    Abstract: Discussed is a frame for display capable of reducing a bezel width, and a display apparatus including the same, wherein the frame for display includes first to fourth frame members connected with each other so as to make a rectangular band shape, wherein each of the first to fourth frame members includes a diagonal connection surface at its end, and a restraint member prepared in the diagonal connection surface, wherein the restraint member prevents deformation in the frame members connected by the diagonal connection surfaces.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: September 4, 2018
    Assignee: LG DISPLAY CO., LTD.
    Inventor: TaeJin Kim
  • Patent number: 10061075
    Abstract: A light guide device that improves the efficiency of backlighting and creates a more uniformly illuminated image is provided. The light guide device includes a first light guide that guides light emitted from a light source and a second light guide component disposed in contact with a surface of the first light guide component to guide incident light incident through the first light guide component. A first optical reflection component is disposed on the surface of the first light guide component to reflect incident light to an adjacent surface of the first light guide component. A second optical reflection component is disposed on a surface of the second light guide component that is adjacent to the first light guide component to reflect incident light through the first optical reflection component to the first light guide component.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: August 28, 2018
    Assignee: Hyundai Motor Company
    Inventor: Hyeong Seon Kim
  • Patent number: 10042109
    Abstract: The invention provides a lighting unit comprising a waveguide for providing first light (111) having a first spectral distribution and second light (121) having a second spectral distribution emanating from a waveguide (100) in different directions, wherein the first spectral distribution and second spectral distribution differ. For instance, the first light (111) and the second light (121) have different color temperatures.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: August 7, 2018
    Assignee: PHILIPS LIGHTING HOLDING B.V.
    Inventors: Rifat Ata Mustafa Hikmet, Ties Van Bommel
  • Patent number: 9890930
    Abstract: A light source module includes a substrate, a first illumination element, a second illumination element and a third illumination element. The first illumination element includes a blue LED chip disposed on the substrate and a first wavelength converting layer that covers the blue LED chip, in which blue light emitted from the blue LED chip can be converted to light in the range of a first wavelength. The second illumination element includes a blue LED chip disposed on the substrate and a second wavelength converting layer that covers the blue LED chip, in which blue light emitted from the blue LED chip can be converted to light in the range of a second wavelength. The third illumination element includes a blue LED chip.
    Type: Grant
    Filed: December 10, 2012
    Date of Patent: February 13, 2018
    Assignee: LEXTAR ELECTRONICS CORPORATION
    Inventors: Yun-Yi Tien, Pei-Song Cai, Jian-Chin Liang
  • Patent number: 9791615
    Abstract: The present invention relates to the field of display techniques, and discloses a light guide plate and a manufacturing method thereof, as well as a backlight module; the light guide plate comprises a light guide plate body and lattice points, wherein the light guide plate body is provided with a light output surface, and a receiving groove for receiving a light source is formed in a surface of the light guide plate body facing away from the light output surface thereof, and a side surface and a bottom surface of the receiving groove form a light input surface. The lattice points are distributed inside the light guide plate body along a plane parallel with the light output surface; the further the lattice points are distanced from the light input surface, the more densely they are distributed.
    Type: Grant
    Filed: May 7, 2015
    Date of Patent: October 17, 2017
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Rui Li, Hongjun Yu, Hong Zhu, Yong Song, Hongkun Zhang, Jun Long, Gang Yang
  • Patent number: 9607489
    Abstract: A household appliance includes an information light device that projects light onto a surface to enable a user to determine whether or not the household device is in operation. The information light device may include a light guide. The light guide may be disposed along a side portion of the household appliance.
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: March 28, 2017
    Assignee: BSH Home Appliances Corporation
    Inventors: Lindsay Roberson, Michael Georg Rosenbauer, Metin Tastan, Ralf Winkler
  • Patent number: 9563002
    Abstract: The disclosure is related to an ultrathin planar light source apparatus, comprising a LED light source and a light guide plate; the LED light source comprises a light emitting chip which is disposed opposite to a light incident side of the light guide plate; a polarizer parallel to the light guide plate and disposed between the light emitting chip and the light guide plate; the polarizer projects the light emitted from the light emitting chip toward the light guide plate. The disclosure controls the light emitted from the LED light source well to deflect within a certain range of angles such that the light completely enter into the light guide plate without increasing the thickness of the light guide plate.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: February 7, 2017
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd
    Inventor: Lingyan Chen
  • Patent number: 9547116
    Abstract: A light guide plate includes a light incident surface, a side surface opposite to the light incident surface, and a light emitting surface connecting to the light incident surface and the side surface. The light emitting surface has a first portion adjacent to the light incident surface and a second portion adjacent to the side surface. The first portion defines a number of first micro recesses. The second portion defines a number of second micro recesses. In a plane perpendicular to the light emitting surface and the side surface, a cross section of each second micro recess is a portion of an ellipse. A major axis of the ellipse is inclined towards the light incident surface. A maximum depth of each second micro recess is greater than a maximum depth of each first micro recess.
    Type: Grant
    Filed: April 14, 2013
    Date of Patent: January 17, 2017
    Assignee: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Yung-Lun Huang
  • Patent number: 9541780
    Abstract: A curved surface backlight unit is disclosed which includes: a light source; a curved surface light guide plate disposed parallel to the light source; first patterns on one surface of the light guide plate; a reflection plate disposed under the light guide plate; optical sheets disposed on the light guide plate; and second patterns formed on one surface of at least one of the optical sheets.
    Type: Grant
    Filed: May 15, 2015
    Date of Patent: January 10, 2017
    Assignee: LG Display Co., Ltd.
    Inventors: Chang Yul Moon, Young Hun Jeong
  • Patent number: 9500795
    Abstract: The present invention relates to an area light source device and a display device using the area light source device. The present invention includes a point light source, and a light guide plate. The light guide plate includes a protruding structure on a light entrance surface side. The protruding structure protrudes from a light exit surface side or a counter light exit surface side opposite from the light exit surface. The point light source includes an arrangement of point light sources. The protruding structure is configured such that oblique cylinders each having a semicircular upper surface protrude and arranged in a direction of the arrangement of the point light sources. The point light sources are arranged so that the lines of intersection of adjacent ones of the oblique cylinders coincide with the middles of the point light sources, respectively.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: November 22, 2016
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kenji Itoga, Akimasa Yuuki, Kazutada Takaira, Seiji Sakai
  • Patent number: 9250376
    Abstract: Disclosed is a transparent display device including a light guide plate formed with a plurality of concave patterns at the lower surface thereof to totally reflect polarized light entered in a lateral direction while transmitting natural light entered from a lower direction therethrough; a light source disposed in a lateral direction of the light guide plate to emit visible light including first and second polarized lights; a first polarizing plate disposed at a lateral portion of the light guide plate to transmit either one of the first and second polarized lights through the light guide plate; a liquid crystal panel for driving liquid crystals to change the phase of the polarized light; and a second polarizing plate for controlling an amount of the polarized light according to the changed phase of the polarized light.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: February 2, 2016
    Assignee: LG DISPLAY CO., LTD.
    Inventors: Se-Hong Park, Jong-Sin Park
  • Patent number: 9234994
    Abstract: The invention described herein is a very thin flat panel LED luminaire, including a flat baseboard, a flat reflection panel, a flat acrylic panel, a flat diffusion panel, LED bar, and aluminum encasement frame which combines with the baseboard to form the chassis for the luminaire. The LED bar is placed along either or both sides of the stack. The acrylic panel is printed with a mesh-like mask pattern of dots in a pattern in which the density of the pattern is decreases the farther away from the LED bar the pattern is, differentially coupling the light from the point source LED bar from the reflection panel into the flat acrylic panel so that illumination across the luminaire is substantially uniform.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: January 12, 2016
    Assignee: CT Advanced LED Lighting, LLC
    Inventor: Yu Lin Sheng
  • Patent number: 9207383
    Abstract: Discussed are a backlight unit and an LCD device using the same. The backlight unit according to an embodiment includes a light source; a light guide plate facing the light source; a plurality of protrusion patterns provided on the bottom of the light guide plate; an optical sheet disposed on the light guide plate; and a reflector disposed under the light guide plate, wherein each of the plurality of protrusion patterns has a cross-sectional structure comprising a first side that is a portion of the bottom of the light guide plate, a second side that extends from one end of the first side, and a third side that extends from the other end of the first side.
    Type: Grant
    Filed: August 15, 2013
    Date of Patent: December 8, 2015
    Assignee: LG Display Co., Ltd.
    Inventors: Young Sam Kim, Byeong-Ryeol Seo, Seungwoo Lim
  • Patent number: 9207388
    Abstract: A light source module including a light guide plate, a first light-emitting device and a second light-emitting device is provided. The light guide plate has a first surface, a second surface and a light incident surface. The light incident surface includes a first and second light incident sub-surfaces and a first end, wherein the second light incident sub-surface is oblique relative to the first light incident sub-surface. The first light-emitting device is disposed beside the first light incident sub-surface, and the second light-emitting device is disposed beside the second light incident sub-surface. The light guide plate has a visual area, and the visual area has a first corner located beside the first end, a light-emitting range of the second light-emitting device covers the first corner, and the second light incident sub-surface is located between the first end and the first light incident sub-surface.
    Type: Grant
    Filed: April 22, 2013
    Date of Patent: December 8, 2015
    Assignee: Coretronic Corporation
    Inventors: Chia-Liang Kang, Yan-Ching Lin, Ping-Feng Hwang, Chen-Hung Lin
  • Patent number: 9207394
    Abstract: A liquid crystal module is disclosed. The liquid crystal module includes a light source, a light guiding device, and a coupling device. The light guiding device is arranged at a light emitting side of the light source and is spaced apart from the light guiding device by a distance. The coupling device is installed between the light source and the light guiding device for controlling a coupling distance therebetween. The coupling device keeps the coupling distance between a light guiding plate and a light source to remain a predetermined value. In this way, the coupling efficiency of the liquid crystal module is not affected by the difference of LEDs or heat inflation so as to enhance the coupling efficiency.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: December 8, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Yanxue Zhang
  • Patent number: 9188711
    Abstract: A light guide plate includes a light incident surface, a light emitting surface and a light guide surface. The light incident surface receives light from an external light source. The light emitting surface emits outward the light received through the light incident surface. The light guide surface faces the light emitting surface and includes a diffusion pattern formed thereon. The diffusion pattern includes a plurality of porous particles and a plurality of spheroidal particles, and the porous particles have pores formed therein and on surfaces thereof.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: November 17, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Seong-Yong Hwang, Jin-Sung Choi, Dae-Young Joung, Tae-Ho Lee
  • Patent number: 9164215
    Abstract: A light guide plate has a light introduction part having an end face configured to have light incident thereon, and a light guide plate body provided continuously to the light introduction part and comprising a thickness smaller than maximum thickness of the light introduction part. The light guide plate body has a light emitting surface configured to emit light incident from the end face. A directivity conversion pattern is provided on at least one of a face on a light exit side and a face opposite to the face. The directivity conversion pattern converts directivity spread in a thickness direction of the light introduction part to a directivity characteristic which is inclined in a direction parallel to a face direction of the light introduction part. A light reflection wall is provided on the end face.
    Type: Grant
    Filed: December 23, 2013
    Date of Patent: October 20, 2015
    Assignee: OMRON Corporation
    Inventors: Masayuki Shinohara, Kazuhide Hirota, Norikazu Kitamura, Takako Ishikawa
  • Patent number: 9151885
    Abstract: A spread illumination apparatus includes: a light source; and a light guide plate having a light entrance surface on which the light source is disposed, and a light exit surface through which light introduced from the light entrance surface is emitted, wherein the light guide plate includes a light entrance wedge portion which has an inclined surface and of which thickness is thinner from the light entrance surface side toward the light exit surface side, the inclined surface includes a first, a second, and a third inclined surface portions, and an average inclination angle of the second inclined surface portion at an arbitrary cross section perpendicular to the light entrance surface and the light exit surface along the light entrance surface in a longitudinal direction is configured to be larger than average inclination angles of the first inclined surface portion and the third inclined surface portion.
    Type: Grant
    Filed: June 19, 2013
    Date of Patent: October 6, 2015
    Assignee: MINEBEA CO., LTD.
    Inventor: Toru Kunimochi
  • Patent number: 9086516
    Abstract: A light-guide apparatus comprising a light-guide plate for guiding light rays and a plurality of light extraction features is described. The light extraction features comprise a transparent material applied to the light-guide plate so as to form an uneven surface. The transparent material may comprise a textured ink applied to the surface of the light-guide plate via a printing process. The incorporation of an uneven surface provides micro-lens like elements on the surface of the extraction feature which have a higher aspect ratio and so lend themselves to the refraction of the light out of the light-guide plate. In this way a device is produced wherein the size, height, location and surface profile of the extraction features can be carefully controlled. As a result the described light-guide apparatus provides for a highly efficient and relatively uniform light output.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: July 21, 2015
    Assignee: DESIGN LED PRODUCTS LIMITED
    Inventor: James Gourlay
  • Patent number: 9039269
    Abstract: A backlight assembly includes a first light source unit including n light emitting members; and a light guide plate including a first side adjacent to the first light source unit, and a first groove adjacent to a first end of the first side.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: May 26, 2015
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Byung-Seo Yoon, Ju-Young Yoon, Han-Moe Cha, Sang-Il Park, Hee-Kwang Song, Jung-Kyun Kim, Su-Chang Ryu
  • Patent number: 9008486
    Abstract: A backlight is disclosed and includes a visible light transmissive body primarily propagating light by TIR with a light input surface and a light output surface and a light guide portion and a light input portion. The light guide portion has a light reflection surface and a light emission surface. The light input portion has opposing side surfaces that are not parallel. One of the opposing surfaces is co-planar with either the light emission surface or the light reflection surface. A light source is disposed adjacent to the light input surface. The light source emits light into the light input portion. A reflective layer is disposed adjacent to or on the opposing side surfaces.
    Type: Grant
    Filed: September 28, 2011
    Date of Patent: April 14, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: William J. Bryan, John C. Schultz, Michael A. Meis, Patrick R. Destain
  • Patent number: 9004735
    Abstract: A backlight module includes a light guide plate and only one light source. The light guide plate has a main body and protrusions. The main body has a light emitting surface, a light incident surface, a first side surface, and a second side surface. The protrusions are positioned on the light incident surface, and face the light source. The protrusions diffuse the light rays from the only one light source and guides the light rays into the main body. The light emitting surface has a light emitting area and a marginal area surrounding the light emitting area. The marginal area has a light diffusion area adjacent to the light incident surface and the first side surface. An included angle between the light incident surface and the first side surface is an obtuse angle. An included angle between the light incident surface and the second side surface is an obtuse angle.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: April 14, 2015
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Po-Chou Chen
  • Publication number: 20150085525
    Abstract: A light guide plate and a backlight module are provided. The backlight module includes a light source and the light guide plate. The light source includes a light emitting surface. The light guide plate includes a light incident surface, a first surface, and a second surface, wherein the first surface is opposite to the second surface. The light guide plate is disposed at a side of the light source. The light incident surface of the light guide plate is opposite to the light emitting surface of the light source. The light incident surface is connected to the first surface and the second surface and includes a first curved surface and a second curved surface. The first curved surface is adjacent to the first surface, and the second curved surface is adjacent to the second surface. The first curved surface is a concave surface.
    Type: Application
    Filed: February 6, 2014
    Publication date: March 26, 2015
    Applicant: Wistron Corporation
    Inventors: Ya-Ping Niu, Chin-Yung Liu
  • Patent number: 8979349
    Abstract: Illumination devices and methods of making same are disclosed. In one embodiment, an illumination apparatus includes a light source, a light guide having a planar first surface, a first end and a second end, and a length therebetween, the light guide positioned to receive light from the light source into the light guide first end, and the light guide configured such that light from the light source provided into the first end of the light guide propagates towards the second end, and a plurality of light turning features that are configured to reflect light propagating towards the second end of the light guide out of the planar first surface of the light guide, each light turning feature having a turning surface and an interferometric stack formed on the turning surface.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: March 17, 2015
    Assignee: QUALCOMM MEMS Technologies, Inc.
    Inventors: Ion Bita, Sapna Patel, Clayton Ka Tsun Chan, SuryaPrakash Ganti, Brian W. Arbuckle
  • Patent number: 8970807
    Abstract: Disclosed is a backlight module having light sources and a light guide plate, and the light guide plate has an incident side, and the lights emitted by the light sources pass through the incident side and enter into the light guide plate, and the a light direction changing layer is positioned at the incident side, and the light direction changing layer is employed for changing progress directions of the lights entering the incident side to shorten a distance perpendicular to the incident side from an intersection point of the lights emitted by adjacent light sources to the light sources. The present invention also discloses a liquid crystal display.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: March 3, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventor: Chihtsung Kang
  • Patent number: 8950926
    Abstract: A planar light source apparatus includes a light source substrate including: a point light source; a mount part, on which the point light source is mounted; and a wiring part, which has a wiring pattern to supply power to the point light source; a frame including: one face, along which the mount part of the light source substrate is arranged: and an attachment part, which is formed on the one face, wherein the light source substrate has either of a cutout or hole at a position corresponding to the attachment part of the frame, and wherein an area of the wiring part is continuously provided from the mount part and is bent with respect to the one face.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: February 10, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventor: Takafumi Kokusho
  • Publication number: 20150022760
    Abstract: A light guide assembly, a backlight module and a liquid crystal display (LCD) are provided. The backlight module includes a back plate light guide plate, an adhesive member and a light source. The light guide plate is disposed on the back plate and includes a first optical surface, a second optical surface and a light-incident surface. The first optical surface is opposite to the second optical surface. The light-incident surface connects the first optical surface and the second optical surface The first optical surface or the second optical surface of the light guide plate is set with recess. The adhesive member is disposed in the recess to adhere the light guide plate to the back plate. The light source is disposed on the back plate and emits light toward the light guide plate.
    Type: Application
    Filed: October 18, 2013
    Publication date: January 22, 2015
    Applicant: Radiant Opto-Electronics Corporation
    Inventors: Yu-Hung HSU, Jui-Lin CHEN
  • Patent number: 8931943
    Abstract: A spread illuminating apparatus includes a point light source with a light-emitting surface, a circuit board with a mounting surface on which the point light source is mounted, and a light guide plate with an incident light surface and an emitting surface. The circuit board is arranged as that at least a partial portion of the circuit board extends beyond an area where the point light source is mounted so as to be superposed on the light guide plate, a light-reflecting member is arranged on the mounting surface, and a region of the mounting surface in which the light-reflecting member is arranged includes a first region that extends forward from a position corresponding to the center of the light-emitting surface of the point light source.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: January 13, 2015
    Assignee: Minebea Co., Ltd.
    Inventor: Toru Kunimochi
  • Patent number: 8920014
    Abstract: A backlight unit includes a light guide plate and a light source unit. The light guide plate includes an exit surface which has a polygonal shape, a lower surface which faces the exit surface, and side surfaces which connect the exit surface and the lower surface. The light guide plate guides a light such that that light exits from the exit surface. The light source unit includes a plurality of light sources which provide the light to the light guide plate. The light guide plate includes a protrusion which protrudes from an end of the lower surface in a direction opposite to the exit surface. The protrusion includes a first inclination surface which is connected to one of the side surfaces, and a second inclination surface which connects the first inclination surface and the lower surface to each other.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: December 30, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventors: Seungin Baek, Taek-Sun Shin, Rae-Young Kim, Jinsung Choi
  • Patent number: 8920015
    Abstract: A backlight includes a visible light transmissive body having a light guide portion and a light input portion. The visible light transmissive body primarily propagates light by TIR and includes a light input surface and a light output surface. The light guide portion has a light reflection surface and a light emission surface. The light input portion has opposing side surfaces that are not parallel. A light source is disposed adjacent to the light input surface and emits light into the light input portion. A specularly reflective layer is disposed adjacent to but not in intimate contact with the opposing side surfaces and reflects more than 80% of visible light incident on the specularly reflective layer.
    Type: Grant
    Filed: September 23, 2008
    Date of Patent: December 30, 2014
    Assignee: 3M Innovative Properties Company
    Inventor: Patrick R. Destain
  • Patent number: 8915635
    Abstract: A backlight to emit light from a surface thereof includes a light guide to guide light, first and second collimating reflectors and a light source to produce light. The first collimating reflector is at a first edge of the light guide to collimate the light from the light source in a vertical direction and to direct the collimated light into the light guide. The second collimating reflector is at a second edge of the light guide to further collimate the collimated light in a horizontal direction and to redirect the further collimated light back into the light guide.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: December 23, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Marco Fiorentino, David A Fattal
  • Publication number: 20140369068
    Abstract: Even though no light source is provided in the vicinity of each curved apex of a main face, the brightness difference depending on the location on the main face is reduced, and a light guide plate that contributes to electric power saving can be provided. A display and a traffic sign including the display that can keep a small brightness difference depending on the location on the main face, and reduce the power consumption. The ratio of the area of the first diffusion dots and second diffusion dots within the second diffusion region is greater than the ratio of the area of the first diffusion dots within the first diffusion region. Even though no light source unit is provided at a curved section, the brightness difference (the unevenness of brightness) depending on the location on the entire main face is reduced, and electric power saving can be achieved.
    Type: Application
    Filed: July 24, 2012
    Publication date: December 18, 2014
    Applicant: S.K.G. CO., LTD.
    Inventors: Mitsuhide Sakamoto, Junichi Ando
  • Patent number: 8911135
    Abstract: A light guide plate includes a light incident surface, a bottom plate, a light emitting surface opposite to the bottom plate, and a side surface opposite to the light incident surface. The light incident surface is perpendicular to the light emitting surface. The bottom surface is imaginarily divided into rectangular sub-portions which are equal in area and shape. A portion of the sub-portions close to the side surface constitutes a main portion. Each sub-portion uniformly distributes micro protrusions. Along a direction from the light incident surface to the side surface, the micro protrusion densities of the sub-portions of the main portion gradually ascend, and the difference values of the micro protrusion densities of any two adjacent sub-portions of the main portion gradually ascend.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: December 16, 2014
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Li-Ying Wang He
  • Patent number: 8905563
    Abstract: A display device with narrowed frame border and a manufacturing method thereof are provided. The display device includes a backlight module, an optical film, and a display panel. The backlight module includes an outer frame and a light source module. The outer frame has a bottom plate and a sidewall connected to the bottom plate, and the light source module is disposed in the outer frame near the sidewall. The optical film is disposed on the backlight module and covers the light source module. One side of the optical film protrudes outside from the sidewall and is bent to attach a portion of the sidewall. The display panel is disposed on the optical film opposite to the backlight module.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: December 9, 2014
    Assignee: AU Optronics Corporation
    Inventors: Chia-Hao Wu, Darman Ng
  • Patent number: 8900025
    Abstract: A liquid crystal display device including a a panel having a liquid crystal layer, and a backlight unit coupled to the panel, for irradiating light to the panel, wherein the backlight unit includes a light source, a light guide plate configured to guide light emitted from the light source to the panel, and a fill spacer in a gap between the light source and a light-incident surface of the light guide plate, the fill spacer including a UV curable material or a thermoplastic elastic material.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: December 2, 2014
    Assignee: Samsung Display Co., Ltd.
    Inventor: Hyun-Shik Lee
  • Patent number: 8899816
    Abstract: A backlight module includes a light guide plate and a light emitting unit. The light guide plate has a first side surface, a second side surface, and a third side surface. The first side surface is located opposite to the second side surface. A height of the first side surface is greater than a height of the second side surface. The third side surface is located between the first side surface and the second side surface and has a light entrance surface and a light exit surface. The light entrance surface is connected to the first side surface and the light exit surface. The light exit surface is connected to the second side surface. An included angle is formed between the light entrance surface and the light exit surface. The light emitting unit is disposed on the light entrance surface.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: December 2, 2014
    Assignee: AU Optronics Corp.
    Inventors: Ya-Lan Lin, Ching-Feng Chen, Cheng-Min Tsai, Ming-Sheng Lai, Ren-Wei Huang
  • Patent number: 8888353
    Abstract: A backlight module includes a light guide plate with at least one light incident surface, and a light source structure arranged at a side of the light guide plate. The light source structure includes a reflection cover and at least one light emitting module. At least one positioning pin is arranged on the reflection cover. The at least one light emitting module is installed on the reflection cover and corresponding to the at least one light incident surface. The at least one light emitting module is fixed on the positioning pin in a rotatable manner, such that the at least one light emitting module can rotate around the positioning pin as an axis when the reflection cover is combined with the light guide plate, so as to allow the at least one light emitting module facing the at least one light incident surface.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: November 18, 2014
    Assignee: AU Optronics Corp.
    Inventors: Cheng-Yu Wang, Cheng-Min Tsai
  • Patent number: 8882323
    Abstract: Flexible unitary lightguide and a method of making the same are disclosed. The lightguide includes a structured input side that includes a first pattern having smaller features superimposed on a second pattern having larger features. The lightguide further includes a structured top surface that includes a first region and a different second region. The first region includes a plurality of discrete light extractors for extracting light that propagates within the flexible unitary lightguide by total internal reflection. The second region includes a taper portion for directing light from the structured input side to the first region. The light extractors form a periodic array that has a first period along the length of the flexible unitary lightguide. The first period is such that substantially no visible moir fringes occur when the flexible unitary lightguide is used as a backlight in a pixelated display.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: November 11, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Jeffrey L. Solomon, Brian A. Kinder, Gary T. Boyd
  • Patent number: 8885118
    Abstract: It is an object of the invention to provide a technique capable of suppressing variations in luminance in the vicinity of a light entrance surface of a light guide plate. An illumination device includes a point light source, and a light guide plate having a side surface serving as a light entrance surface opposed to the point light source, and a main surface serving as a light exit surface. The light entrance surface of the light guide plate is provided with unevenness formed by arraying at predetermined pitches a plurality of protrusions each projecting from the light entrance surface and extending in a direction perpendicular to the light exit surface. Each of the top surface and the bottom surface of the unevenness is provided with a plurality of micro protrusions each extending in the direction perpendicular to the light exit surface and having a height smaller than the above protrusion.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: November 11, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Akimasa Yuuki, Kenji Itoga, Naoko Iwasaki, Takafumi Kokusho, Yuji Tsuchiyama, Seiji Sakai
  • Publication number: 20140321155
    Abstract: The objective of the present invention is to orient an LED emitting surface not toward an upper surface, but rather toward a portion of a light guide plate on which the light is incident by using the scattering pattern of the light guide plate, and then maintain the uniformity of the distribution of the light emitted from the light guide plate by means of a scattering pattern of the light guide plate, in order to increase light-emitting efficiency.
    Type: Application
    Filed: May 11, 2012
    Publication date: October 30, 2014
    Applicant: TECHSIGN LIGHT PANEL CO., LTD.
    Inventor: Mee Suk Rho
  • Patent number: 8870435
    Abstract: A light guide comprising: a main light-guide housing that is elongated shaped, having a first end face, a second end face, and a first lateral face connecting the first end face and the second end face, and the main light-guide housing being elongated in a predetermined direction from the first end face to the second end face; and a protrusion that is connected to the main light-guide housing, having a third end face in an opposite direction from the predetermined direction and a second lateral face connecting the third end face to the first end face, and the protrusion projecting from the first end face in the opposite direction from the predetermined direction, wherein, light emitted toward the third end face by a light source in part exits the protrusion from the second lateral face, then enters the main light-guide housing from the first end face, and thereafter exits the light guide from the first lateral face.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: October 28, 2014
    Assignee: Konica Minolta, Inc.
    Inventor: Yuichi Akahori
  • Patent number: 8870434
    Abstract: A planar light guide film for a backlight unit having at least one point light source is disclosed. The light guide film includes a light input surface for receiving light from the point light source, a light redirecting surface for redirecting light received from the light input surface and a light output surface for outputting at least the light redirected from the light redirecting surface. The light input surface further includes a composite lens structure having a first and second circular tip segment each circular tip segment with a first contact angle, and a first and second circular base segment each circular base segment with a top and bottom contact angle, the contact angles of the circular base segments being less than the contact angle of the circular tip segments.
    Type: Grant
    Filed: September 12, 2011
    Date of Patent: October 28, 2014
    Assignee: SKC Haas Display Films Co., Ltd.
    Inventors: Qi Hong, Karen A. Malburne
  • Publication number: 20140313777
    Abstract: A light guiding plate includes a bottom surface, a light emitting surface opposite to the bottom surface, and a light incident surface perpendicularly connected between the bottom surface and the light emitting surface. The light guiding plate defines a plurality of recesses in the light incident surface. Each recess includes a concave surface, and the concave surface is connected between the light emitting surface and the bottom surface. Each concave surface forms a smooth curve on the light emitting surface. A distance between two points of the smooth curve the same distance away from the light incident surface gradually decreases along a direction away from the light incident surface.
    Type: Application
    Filed: March 20, 2014
    Publication date: October 23, 2014
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: LI-YING WANG HE
  • Patent number: 8864356
    Abstract: A backlight module includes a light guide plate, a first light source device, and a second light source device. The first light source device is disposed adjacent to a first side surface of the light guide plate and has at least one first polarized light source for emitting a first polarized light beam. The second light source device is disposed adjacent to a second side surface of the light guide plate and has at least one second polarized light source for emitting a second polarized light beam. The light guide plate includes a first polarized light transmitting region adjacent to the second light source device and a second polarized light transmitting region adjacent to the first light source device.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: October 21, 2014
    Assignee: Young Lighting Technology Inc.
    Inventor: Hsin-Wu Lin
  • Publication number: 20140307477
    Abstract: A light guide plate includes a main body and a number of transparent particles. The main body includes a light incident surface, and defines a micro structure in the light incident surface. The transparent particles are made of material with a refraction index greater than the refraction index of the material of the main body and are attached on the light incident surface in the micro structure.
    Type: Application
    Filed: August 21, 2013
    Publication date: October 16, 2014
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: LI-YING WANG HE