Optical Waveguide Patents (Class 362/610)
  • Patent number: 10302838
    Abstract: A liquid crystal display according to an exemplary embodiment of the present invention includes a display panel and a light assembly configured to provide light to the display panel, wherein the light assembly includes: a light-emitting device configured to emit first light; a light guide positioned to receive the first light; and a quantum dot sheet positioned on the light guide and positioned to receive the first light from the light guide, the quantum dot sheet configured to emit second light responsive to the received first light. The quantum dot sheet includes a nanophosphor and an antioxidant, and the antioxidant includes at least one compound selected from a group including a phenol-based compound, a phosphorus-based compound, and a sulfur-based compound.
    Type: Grant
    Filed: November 11, 2016
    Date of Patent: May 28, 2019
    Assignee: Samsung Display Co., Ltd.
    Inventors: Baek Hee Lee, Young Min Kim, Min Ki Nam, Kyoung Won Park, Hae Il Park
  • Patent number: 10260695
    Abstract: The invention describes a light conversion module (100) comprising a transparent substrate (120), a conversion layer (110) attached to a light exit side of the substrate (120), wherein the conversion layer (110) is arranged to convert a part of laser light (10) of a first wavelength range entering the substrate (120) via a light entrance side to converted laser light (20) of a second wavelength range different from the first wavelength range, and to transmit another part of the laser light (10), such that a mixture of the transmitted laser light (15) and of a part of the converted laser light (20) leaves the conversion layer (110) in forward direction opposite to the side where the conversion layer (110) is attached to the light exit side of the substrate (120), and wherein the substrate (120) is arranged such that converted laser light (20) entering the substrate via the light exit side is inhibited to re-enter the conversion layer (110) via the light exit side by arranging a thickness of the substrate (120)
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: April 16, 2019
    Assignee: LUMILEDS HOLDING B.V.
    Inventors: Ulrich Hechtfischer, Steffen Zozgornik
  • Patent number: 10209432
    Abstract: A backlight device (12) includes a light guide plate (14), and LEDs (17), and wiring portions (18c). The light guide plate (14) has a substantially circular outer shape and has fan-shaped areas (SA) defined by segment lines (SL) extending through a center (C) thereof. All the segment lines (SL) meet at the center (C). The LEDs (17) are arranged such that middle positions between LEDs (17) each located at an end in the circumferential direction in the respective sets of the LEDs (17) provided for the fan-shaped areas (SA) adjacent to each other in the circumferential direction coincides with the segment lines (SL). The wiring portions (18c) are equal or larger in number than the LEDs (17) included in each of the sets of LEDs (17) provided for the fan-shaped areas (SA) and are configured to supply electric power to the respective LEDs (17).
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: February 19, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Mitsuhiro Murata, Ryuzo Yuki, Hisashi Watanabe, Shinya Kadowaki, Takeshi Ishida, Takeshi Masuda
  • Patent number: 9964683
    Abstract: The present disclosure discloses a light guide plate, a backlight module and a liquid crystal module. The light guide plate includes a plurality of light guide blocks; the light guide blocks are doped with scattering particles. Since the light guide plate includes a plurality of light guide blocks, this can simplify the cutting of the light guide plate and the making of grid points. The light guide blocks are doped with scattering particles, so that most of rays incident upon the light guide blocks are scattered in a preset direction and guided to a middle part and the light-far end of the backlight module to compensate the brightness of the middle part and the light-far end, thus making the brightness of the side light type backlight display uniform.
    Type: Grant
    Filed: July 24, 2014
    Date of Patent: May 8, 2018
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., BEIJING BOE DISPLAY TECHNOLOGY CO., LTD.
    Inventors: Yu Zhang, Wenwen Ma, Lili Jia, Qing Ma, Daekeun Yoon
  • Patent number: 9964682
    Abstract: A light source module including a light guide plate, a light source set and a light modulating device is provided. The light guide plate includes a light entering surface. The light source set is disposed beside the light entering surface. The light source set is adapted to emit a first light beam. The light modulating device is disposed between the lightsource set and the light guide plate. The light modulating device includes a light filtering portion. The first light enters the light entering surface through the light modulating device, and the light modulating device makes a divergence angle of the first light converge.
    Type: Grant
    Filed: December 1, 2016
    Date of Patent: May 8, 2018
    Assignee: Young Lighting Technology Inc.
    Inventors: Chin-Ku Liu, Jhong-Hao Wu
  • Patent number: 9952373
    Abstract: A light source module including a light guide plate, a light source set and a light modulating device is provided. The light guide plate includes a light entering surface. The light source set is disposed beside the light entering surface. The light-source is adapted to emit a first light beam. The light modulating device is disposed between the light source set and the light guide plate. The light modulating device includes a light reflection portion. The first light enters the light entering surface through the light modulating device, and the light modulating device makes the divergence angle of the first light converge.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: April 24, 2018
    Assignee: Young Lighting Technology Inc.
    Inventors: Chin-Ku Liu, Jhong-Hao Wu
  • Patent number: 9851488
    Abstract: Disclosed are a light guide plate and a backlight unit including the same. The light guide plate includes: a light guide plate including: a light output surface for outputting light to the outside; a reflective surface which is located in the opposite side of the light guide plate; and a light incident surface which is provided in at least one side surface among side surfaces connecting the light output surface and the reflective surface, and to which the light emitted from a light source is incident. A flat portion having a constant thickness is provided in a space which is spaced apart from the light incident surface, and a light input portion is formed in a space between the light incident surface and the flat portion, and a thickness of the light input portion is changed in a greater range than that of the flat portion.
    Type: Grant
    Filed: August 18, 2015
    Date of Patent: December 26, 2017
    Assignee: New Optics, Ltd
    Inventors: Dong-Yong Kim, Jong-Moon Yoon, Min-Kyoung Park
  • Patent number: 9454010
    Abstract: A display system for a head mounted device that provides a wide field-of-view image to the user. The system may use a pair of displays angled relative to one another, and a lens or lenses between the displays and the user's eyes to generate a wide field-of-view image. Lenses may be for example gradient index lenses, Fresnel lenses, or holographic optical elements in order to provide significant and complex bending of light across the field of view with relatively thin lenses. The system may provide lower resolution images at the periphery of the user's field of view, using for example light emitting elements at the periphery that are directed by the lens or lenses towards the outside edges of the field of view.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: September 27, 2016
    Assignee: Ariadne's Thread (USA), Inc.
    Inventors: Charles Gregory Passmore, Adam Li
  • Patent number: 9383508
    Abstract: A multi-wing edge-lit structure includes a first edge-lit light guide panel, a second edge-lit light guide panel, and a joiner unit. The first edge-lit light guide panel is adjustably attached to the joiner unit on a first side of the joiner unit. The second edge-lit light guide panel is adjustably attached to the joiner unit on a second side of the joiner unit. The first side and the second side are opposite sides of the joiner unit.
    Type: Grant
    Filed: April 21, 2014
    Date of Patent: July 5, 2016
    Assignee: Cooper Technologies Company
    Inventors: William Edward Getzinger, Marc Raymond O'Leary, Bradley Stephen Garrett, Travis William Francis Boyle
  • Patent number: 9244215
    Abstract: An electronic device may be provided with a display. Backlight structures may be used to provide backlight for the display. The backlight structures may include a light guide plate. A rectangular ring-shaped chassis may have a rectangular opening that receives the light guide plate. One or more edges of the chassis may be provided with an array of notches that receive light-emitting diodes or other light sources. The light sources may launch light into edge portions of the light guide plate. The chassis may include a first plastic structure such as a light reflecting structure formed from a material such as white plastic. The first plastic structure may surround two or more peripheral edges of the light guide plate. The chassis may also include a second plastic structure such as a light blocking structure formed from a material such as black plastic that helps prevent light leakage.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: January 26, 2016
    Assignee: Apple Inc.
    Inventors: Shawn R. Gettemy, Joshua G. Wurzel, David A. Doyle, Alexander D. Schlaupitz
  • Patent number: 9201190
    Abstract: A display device includes a display panel, a light guide plate (LGP), a light source, and a positioning component. The LGP is disposed on a display surface of the display panel and has an upper surface and a lower surface opposite to each other, a light-incident surface, a first light-guiding block, and a second light-guiding block. A display area of the display panel corresponds to the first light-guiding block. The second light-guiding block extends outside the display area and has at least one recess portion. The recess portion is located on at least one of the upper surface and the lower surface and extends to the light-incident surface. The light source is disposed beside the light-incident surface. The positioning component is disposed on the second light-guiding block and located in the recess portion. Besides, the positioning component extends outside the recess portion and fixes the location of the light source.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: December 1, 2015
    Assignee: E Ink Holdings Inc.
    Inventors: Sheng-Chieh Tai, I-Jeng Chen
  • Patent number: 9128224
    Abstract: A surface light source device has a light source, and a light guide plate introducing light of the light source from a light incidence surface and emitting the light from a light exit surface to outside. The light source being is provided at a position facing the light incidence surface of the light guide plate. The light guide plate includes a light introducing part for enclosing the light from the light source entering from the light incidence surface and a light guide plate main body having a thickness smaller than a maximum thickness of the light introducing part, provided so as to be continued to the light introducing part, and emitting the enclosed light from the light exit surface by light emitting portion to outside.
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: September 8, 2015
    Assignee: OMRON Corporation
    Inventors: Gouo Kurata, Masayuki Shinohara
  • Patent number: 9039266
    Abstract: A reflective color pixel has a top surface for receiving ambient light for front lighting, a plurality of sub-pixels including a first sub-pixel, and a waveguide disposed underneath the sub-pixels for transmitting light for backlighting to the sub-pixels. The first sub-pixel includes a first luminescent material configured to absorb either the ambient light or the light for backlighting and generate light of a first color.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: May 26, 2015
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Gary Gibson
  • Publication number: 20150131317
    Abstract: The present invention aims at providing an illumination device and a display device that can suppress uneven brightness while improving light use efficiency and brightness. The illumination device includes a plurality of light sources arranged next to each other, a light guide member that guides light from the light sources, and protrusions that protrude towards the respective light sources from an end face of the light guide member. The protrusions each have side faces formed such that light emitted so as to spread in the arrangement direction of the light sources exits the light guide member and then re-enters from the end face thereof.
    Type: Application
    Filed: May 24, 2013
    Publication date: May 14, 2015
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Ryuzo Yuki, Takeshi Ishida
  • Publication number: 20150124480
    Abstract: Methods and apparatus for providing one or more components for a display system, particularly for producing diffused light.
    Type: Application
    Filed: April 5, 2013
    Publication date: May 7, 2015
    Inventors: David Eugene Baker, Michael Etienne, Stephan Lvovich Logunov, Daniel Aloysius Nolan, Wageesha Senaratne, Luis Alberto Zenteno
  • Patent number: 9022635
    Abstract: Disclosed are a light guide plate and a backlight unit. The backlight unit according to the present invention includes: a light guide plate; a light source disposed on one side of the light guide plate; and a reflective plate disposed under the light guide plate, wherein, in the cross section of one side of the light guide plate, the light guide plate includes a plurality of unit slits including a first slit and a second slit, wherein the first slit and the second slit are inclined from a top surface toward the inside of the light guide plate with respect to a vertical direction of the top surface, and wherein the first slit and the second slit are symmetrical to each other with respect to the middle portion of the unit slit.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: May 5, 2015
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Jun-Bo Yoon, Joo-Hyung Lee, Jeong-Ho Yeon
  • Patent number: 9022590
    Abstract: A luminous keyboard device includes plural keys, a light-emitting element, and a light guide plate. By the light guide plate, a light beam emitted by the light-emitting element is guided to the plural keys. The light guide plate includes plural elongated slots and a light-absorbing part. The plural elongated slots are located near a lateral edge of the light guide plate. After the light beam transferred within the light guide plate is transmitted through the elongated slots and departed from the light guide plate, the fraction of the light beam introduced into the lateral edge of the light guide plate is reduced. The light-absorbing part is located at the lateral edge of the light guide plate for absorbing the portion of the light beam which is introduced into the lateral edge of the light guide plate. Consequently, the lateral light leakage of the light guide plate can be avoided.
    Type: Grant
    Filed: August 1, 2013
    Date of Patent: May 5, 2015
    Assignee: Primax Electronics Ltd.
    Inventors: Chung-Yuan Chen, Hsuan-Wei Ho
  • Patent number: 9019199
    Abstract: Disclosed herein is an electrophoretic display apparatus switchable between a black-white mode and a color mode. The electrophoretic display apparatus includes an electrophoretic display panel, a light guide, a light source, a light-splitting element and a lens element. The light guide is disposed in front of a display area of the electrophoretic display panel. The light source is operable to emit a light, which is directed to the display area by the light guide. The light-splitting element is disposed between the light guide and the electrophoretic display panel, and is operable to split the light into a first, a second and a third beam each having a principal wavelength different from the others. The lens element is disposed between the light-splitting element and the display area, and is operable to direct the first, second and third beams to corresponding sub-pixels.
    Type: Grant
    Filed: November 6, 2012
    Date of Patent: April 28, 2015
    Assignee: E Ink Holdings Inc.
    Inventor: Shih-Yu Wang
  • 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: 9007693
    Abstract: An exemplary video wall includes two display panels and a polygonal mullion elimination lens. Each of the display panels includes a main body and a bezel surrounding the main body. The polygonal mullion elimination lens includes a central first concave surface configured to reflect internal light incident thereon, two flat surfaces respectively attached to the main bodies of the display panels, a central second concave surface opposite to the first concave surface, and two lateral surfaces each connecting between a corresponding one of the flat surfaces and the second concave surface. Portions of light emitted by the main bodies of the display panels can enter the mullion elimination lens via the flat surfaces.
    Type: Grant
    Filed: November 29, 2013
    Date of Patent: April 14, 2015
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventors: Han-Lung Lee, Shan-Fu Huang, Ho-Chiang Liu
  • Patent number: 8998474
    Abstract: A surface light source device includes a surface light-emitting light-guiding unit; an LED light source disposed at an outside position on a side of a direction of the light incident surface; a plurality of laser light sources disposed at an outside position on a side of a direction of a rear surface of the surface light-emitting light-guiding unit; and a laser-light-ray guiding unit arranged on a side of a rear surface of the surface light-emitting light-guiding unit. The laser-light-ray guiding unit guides the laser light rays emitted from the laser light sources so that the laser light rays enter through a light incident end surface, travel in a direction opposite to a direction in which the LED light source emits the LED light ray, and thereafter are reflected by a light bending part to enter through the light incident surface of the surface light-emitting light-guiding unit.
    Type: Grant
    Filed: January 17, 2012
    Date of Patent: April 7, 2015
    Assignee: Mitsubishi Electric Corporation
    Inventors: Rena Nishitani, Nami Nakano, Shuichi Kagawa, Muneharu Kuwata, Kuniko Kojima
  • Patent number: 8998436
    Abstract: A light source apparatus includes a light guide plate, a number of optical fibers, at least two first light emitting diodes, and at least two second LEDs. Each fiber has a light exiting surface facing the light guide and at least two light entrances at both ends of the fiber. The second LEDs are located on both sides of the light guide plate. Light generated by the first LEDs has a wavelength longer than that generated by the second LEDs. The light generated from the first LEDs enters the light guide plate after travelling through the optical fiber to mix with the light generated from the second LEDs to provide a good color rendering property of the light generated by the light source.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: April 7, 2015
    Assignee: Zhongshan Innocloud Intellectual Property Services Co., Ltd.
    Inventors: Chih-Hsun Ke, Ming-Ta Tsai, Pu-Xian Hsu
  • Patent number: 8979346
    Abstract: The present invention provides a backlight module and a display apparatus. The display apparatus comprises the backlight module and a display panel. The backlight module comprises a light collector, at least one optical fiber, a fiber arrangement substrate and a light guide plate. The optical fiber is connected between the light collector and the fiber arrangement substrate. The light guide plate is disposed at one side of the fiber arrangement substrate. The present invention can use ambient light rays to form a backlight source.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: March 17, 2015
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventors: Chechang Hu, Li-Yi Chen, Kuangyao Chang, Yong Fan, Chao Ning
  • Patent number: 8979345
    Abstract: The present disclosure relates to a surface light emitting apparatus including: a light source bar including a light source for generating an optical signal; at least one optical distributor for dividing the optical signal generated in the light source into a plurality of optical signals; a light guide plate for confining the plurality of optical signals divided by the optical distributor in an inside thereof and transfer the optical signals; and a scattering pattern formed on a surface of the light guide plate and for emitting a light by the optical signal transferred through the light guide plate.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: March 17, 2015
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Suntak Park, Seung Koo Park, Min-Su Kim, Ki Uk Kyung
  • Patent number: 8979339
    Abstract: A light source module includes a light source and a light guiding pole. The light guiding pole is made of transparent material and has a light incident surface and at least one side surface connected to the light incident surface. The light source emits light rays, and faces the light incident surface. The light incident surface guides the light rays into the light guide pole, and the at least one side surface totally reflects the light rays. At least one slot is defined at the at least one side surface, and extends along a lengthwise direction of the light guiding pole. The at least one slot destroys the totally reflective path of a portion of the light rays arriving the at least one side surface, and thus the portion of the light rays emits from the at least one side surface.
    Type: Grant
    Filed: March 26, 2013
    Date of Patent: March 17, 2015
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Li-Ying Wang He
  • Patent number: 8979292
    Abstract: This display includes point light sources, a light guide plate including a light-receiving surface on which light emitted from the point light sources is directly incident, opposed to the point light sources, and a display cell provided on a surface of the light guide plate, while a plurality of projecting portions each having a width smaller than a width of each of the point light sources in an extensional direction of a side of the light guide plate provided with the light-receiving surface are provided on a region of the light-receiving surface of the light guide plate opposed to the point light sources, and the plurality of projecting portions of the light guide plate are formed to have irregularly different shapes.
    Type: Grant
    Filed: May 2, 2012
    Date of Patent: March 17, 2015
    Assignee: Funai Electric Co., Ltd.
    Inventor: Tomohisa Tajiri
  • Publication number: 20150070932
    Abstract: A light source unit includes: a light guiding plate having a front surface and a rear surface facing each other, and a side surface between the front surface and the rear surface; a light guiding bar disposed on the side surface of the light guiding plate; a quantum dot package disposed on a surface of the light guiding bar; and a dot light source which provides light to the quantum dot package.
    Type: Application
    Filed: July 29, 2014
    Publication date: March 12, 2015
    Inventors: Dong Earn KIM, Jeong Hee LEE, Eun Joo JANG, Min Jong BAE, Sang Eui LEE
  • Patent number: 8974104
    Abstract: A backlight module includes a light guide plate, at least one light source, and a light-reflecting plate. The light guide plate includes a light-emitting surface, a bottom surface, a light-incident surface, and a guiding tilt surface. One end of guiding tilt surface and light-emitting surface are intersected at a first boundary, and the other end connects to a top edge of light-incident surface. The guiding tilt surface extends toward a direction of protruding the light-emitting surface. The horizontal distance between the first boundary and light-incident surface is L. The light-reflecting plate is disposed under the bottom surface. When the horizontal distance d between light-incident surface and an end of light-reflecting plate near light-incident surface is less than L, the horizontal distance between a vertical projection of the end on light-emitting surface and first boundary is not more than 0.5 mm. When d is more than L, x is at least 0.5 mm.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: March 10, 2015
    Assignee: AU Optronics Corporation
    Inventors: Yi-Wen Chang, Fu-Cheng Fan
  • Publication number: 20150062967
    Abstract: A light source unit includes a light guide plate which includes a front surface and a rear surface which are opposite to each other and a side between and connecting the front surface and the rear surface, a light conversion device on the side of the light guide plate; and a light source which generates and supplies light to the light conversion device.
    Type: Application
    Filed: April 14, 2014
    Publication date: March 5, 2015
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Min Jong BAE, Jeong Hee LEE, Dong Earn KIM, Sang Eui LEE, Na Youn Won, Hyun A KANG, Shin Ae JUN
  • Publication number: 20150029752
    Abstract: A display device includes a light guide plate, at least one illuminating element, a side frame, and a display panel. The light guide plate includes a main body and at least one light-incident protrusion part. The main body has a light-emitting surface. The light-incident protrusion part is connected to the main body and has a light-incident surface. The illuminating element is arranged along the light-incident surface and is capable of emitting a light beam. The light beam enters the light guide plate from the light-incident surface and leaves the light guide plate from the light-emitting surface. The side frame is located on the light guide plate. The display panel is located between the light guide plate and the side frame. The side frame and the display panel expose the light-incident protrusion part. The side frame of the display device described herein has the small width.
    Type: Application
    Filed: July 24, 2013
    Publication date: January 29, 2015
    Applicant: YOUNG LIGHTING TECHNOLOGY INC.
    Inventors: Wu-Hsieh Lee, Hung-Sen Lin, Chao-Chung Tsen, Wei-Kai Liao, Chi-Lun Chen
  • Patent number: 8939596
    Abstract: Disclosed is a condensing type optical sheet for use in a liquid crystal display, which prevents the generation of a yellow band or a rainbow phenomenon without using a protective sheet.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: January 27, 2015
    Assignee: Kolon Industries, Inc.
    Inventors: Hyun Soo Lee, Chang Pyo Hong, Chung Seock Kang
  • 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
  • Patent number: 8905615
    Abstract: A light source module includes a first frame, a second frame, a light guide plate, a light source, at least one positioning element and at least one buffer element. The second frame is disposed corresponding to the first frame and has at least one through hole. The light guide plate is disposed between the first frame and the second frame and has a light incident surface and a side surface, and the side surface faces to the through hole of the second frame. The light source is disposed on the light incident surface of the light guide plate. The positioning element is disposed in the through hole of the second frame. The buffer element is located between the positioning element and the side surface of the light guide plate.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: December 9, 2014
    Assignee: Au Optronics Corporation
    Inventors: Shih-Chieh Chen, Yao-Chi Liu
  • Patent number: 8905566
    Abstract: A flat-panel display (such as a liquid crystal display) includes one or more features that reduce temperature changes in an array of light valves disposed on a substrate. In particular, heat generated in a light source and/or electronics is conducted away from the light values. For example, a light-source holder, which contains the light source, may include holes that increase the thermal resistance between the light source and the substrate. Alternatively, the light-source holder may include a material having a thermal conductivity that is higher than that of stainless steel. In addition, the flat-panel display may include materials and/or a geometry that increases the thermal resistance along a direction in a plane of the substrate. By reducing temperature changes in the flat-panel display, these features can reduce or eliminate color changes and other visual artifacts that can degrade the quality of displayed images.
    Type: Grant
    Filed: June 27, 2012
    Date of Patent: December 9, 2014
    Assignee: Apple Inc.
    Inventors: Ihtesham H. Chowdhury, Frank F. Liang, Amaury J. Heresztyn, Jeremy C. Franklin, Benjamin M. Rappoport, Derek W. Wright
  • 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: 8894210
    Abstract: An optical element is provided with: first polarization-separation layer (13) that is laminated on first surface (12b) of light guide body (12) and that, of the light incident from light guide body (12), transmits X-polarized light and reflects Y-polarized light that is orthogonal to the X-polarized light; polarization hologram layer (14) that is laminated on first polarization-separation layer (13) and that diffracts to a prescribed diffraction angle the X-polarized light that is incident within a prescribed range of angles of incidence and converts the X-polarized light to Y-polarized light; second polarization-separation layer (15) that is laminated on polarization hologram layer (14) and that, of the light incident from polarization hologram layer (14) transmits Y-polarized light and reflects X-polarized light; reflection layer (18) provided on second surface (12c) side of light guide body (12); and phase difference layer (17) that is provided between first surface (12b) of light guide body (12) and refle
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: November 25, 2014
    Assignee: NEC Corporation
    Inventor: Shin Tominaga
  • Publication number: 20140340933
    Abstract: A light guide element includes a wedge-shaped light coupling member and a rectangular light guide plate. The light coupling member includes a first bottom surface, a top surface opposite to the first bottom surface, a light incident surface interconnected between the first bottom surface and the top surface, a first connecting surface parallel with and opposite to the light incident surface, a slanted surface connecting the first connecting surface to the top surface, and a reflection film formed on the top surface and the slanted surface. The light guide plate includes a second bottom surface, a light output surface opposite to the second bottom surface, and a second connecting surface perpendicularly interconnected between the second bottom surface and the light output surface. The second connecting surface connects and overlaps the first connecting surface. The height of the light incident surface is larger than that of the second connecting surface.
    Type: Application
    Filed: September 27, 2013
    Publication date: November 20, 2014
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: Chen-Han LIN
  • Patent number: 8870431
    Abstract: A mixing light module includes a matrix, a fluorescent film, and a plurality of micro-structures. The matrix includes an incidence surface, an emission surface and a reflective surface. The fluorescent film disposed on or above the emission surface has an upper surface and a lower surface and includes a plurality of fluorescent particles. The matrix receives a first light having a first wavelength, and the reflective surface reflects the first light to make the first light to be emitted from the emission surface. Since the plurality of fluorescent particles receives a part of the first light from the emission surface, the plurality of fluorescent particles is excited to emit a second light having a second wavelength. The second light and the first light are mixed into a predetermined light. The plurality of micro-structures is used to make the first light or the second light uniform.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: October 28, 2014
    Assignee: Industrial Technology Research Institute
    Inventors: Hui-Hsiung Lin, Chiun-Lern Fu, Hsiao-Wen Hung, Wen-Hsun Yang, Chi-Hung Liao, Wen-Jung Chen
  • Patent number: 8864359
    Abstract: An ultra thin lighting element including at least one light source (1b). A lightguide element (2c) includes one lightguide layer comprising a plurality of discrete fine optic surface relief structures (3e) on at least one portion of at least one surface. Each surface relief structure (3e) includes basic structural features on the order of about 10 microns or less in height, and on the order of about 10 microns or less in each lateral dimension. The number, arrangement and size of each surface relief structure (3e) and height and lateral dimensions of the structural features of the surface relief structures (3e) being varied to provide a desired degree of outcoupling modulation of light incoupled into the light guide element.
    Type: Grant
    Filed: November 30, 2012
    Date of Patent: October 21, 2014
    Assignee: Modilis Holdings LLC
    Inventor: Kari J. Rinko
  • Patent number: 8864360
    Abstract: A lighting assembly includes a light guide having opposed major surfaces between which light propagates by total internal reflection and a light input edge. The light assembly also includes a light engine. The light engine has a heat conductive armature having a receptacle for a portion of the light guide that includes the light input edge and a light source retained by and thermally coupled to the armature. The armature functions as a heat sink for dissipating heat generated by the light source. The light guide is mechanically retained in the receptacle, and the light guide and the armature cooperate to align the light input edge with the light source for inputting light from the light source into the light guide through the light input edge.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: October 21, 2014
    Assignee: Rambus Delaware LLC
    Inventors: Jeffery R. Parker, Timothy A. McCollum, Martin E. Ligas, Joseph Crookston, Fumitomo Hide, Alexey Titov, Ian Hardcastle
  • Patent number: 8860910
    Abstract: The present invention provides a backlight module and a display apparatus. The display apparatus comprises the backlight module and a display panel. The backlight module comprises a light collector, at least one optical fiber bundle, a fiber light-outputting substrate, a light guide plate and a fiber holding plate. The optical fiber bundle is connected between the light collector and the fiber light-outputting substrate. The light guide plate is disposed at one side of the fiber light-outputting substrate, and the fiber holding plate is configured to hold optical fibers of the optical fiber bundle. The present invention can use ambient light rays to form a backlight source.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: October 14, 2014
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventors: Shih Hsiang Chen, Li-Yi Chen, Dehua Li, Guofu Tang
  • Publication number: 20140293647
    Abstract: A luminous body is described, in particular in the form of a planar lighting device for general lighting or for backlighting of displays, which luminous body comprises a plurality of light sources, for example LED elements, arranged in a housing, in particular an optical waveguide plate. The optical waveguide plate forms a first optical medium with a first optical scattering power, into which the light of the light sources is coupled. Furthermore, at least one second optical medium with a second optical scattering power is provided, such that the light propagating in the second optical medium is at least substantially coupled in from the first optical medium, and the scattering power of at least one of the media is chosen for the purpose of influencing the flow of light in the housing such that a given brightness distribution of the light on the light emission surface is achieved.
    Type: Application
    Filed: June 16, 2014
    Publication date: October 2, 2014
    Inventor: Horst GREINER
  • Patent number: 8848137
    Abstract: The present invention provides a backlight module and a display apparatus. The display apparatus comprises the backlight module and a display panel. The backlight module comprises a light collector, optical fibers, a fiber light-outputting substrate and a light guide plate. The optical fibers are connected between the light collector and the fiber light-outputting substrate. The light guide plate is disposed at one side of the fiber light-outputting substrate. The light guide plate includes light diffusion recessions, and the light diffusion recessions face the light-outputting openings of the fiber light-outputting substrate. The present invention can use ambient light rays to form a backlight source.
    Type: Grant
    Filed: November 23, 2012
    Date of Patent: September 30, 2014
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventors: Chechang Hu, Hu He
  • Patent number: 8848135
    Abstract: The liquid crystal display device has a liquid crystal display panel, a backlight for illuminating the liquid crystal display panel where the outer shape of the backlight in a plane has at least one corner of which the angle is greater than 90°, and a light guide plate LG having approximately the same form as the outer shape of the backlight, wherein a number of light emitting diodes are aligned along two sides (s1, s3) of the light guide plate LG that form a corner A of which the angle is greater than 90°, and the main light for illumination (L2 to L4, L6 and L7) from the light emitting diodes aligned along the two sides propagates through the light guide plate LG in the same direction.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: September 30, 2014
    Assignee: Japan Display Inc.
    Inventor: Nobuyuki Koganezawa
  • Patent number: 8842238
    Abstract: A backlight unit being scan-driven is discussed. The backlight unit according to an embodiment includes light sources configured to emit light, and a light guide plate disposed parallel to the light sources and configured to convert spotted lights entered from the light sources into two-dimensional light. The light guide plate includes a plurality of air barriers arranged at a fixed interval and configured to guide lights from the light sources in blocks with a width of the fixed interval.
    Type: Grant
    Filed: November 19, 2010
    Date of Patent: September 23, 2014
    Assignee: LG Display Co., Ltd.
    Inventors: Hee Kyung Lee, Byoung Ku Kim, Jun Ho Bae, Yong Ik Hwang
  • Patent number: 8842366
    Abstract: An apparatus and method for transmitting, collimating and redirecting light from a point-like source to produce a collimated optical signal in a substantially planar form are provided. In one embodiment, the apparatus is manufactured as a unitary transmissive body comprising a collimation element and a redirection element, and optionally a transmissive element. In another embodiment, the apparatus is assembled from one or more components. The apparatus and method are useful for providing sensing light for an optical touch input device or for providing illumination for a display.
    Type: Grant
    Filed: May 12, 2008
    Date of Patent: September 23, 2014
    Assignee: Zetta Research and Development LLC—RPO Series
    Inventors: Kenneth Edmund Arnett, Robert Bruce Charters, Chan Hong Wang, Graham Roy Atkins, Ian Andrew Maxwell, Duncan Ian Ross
  • Patent number: 8840292
    Abstract: The present invention provides a backlight module and a display apparatus. The display apparatus comprises the backlight module and a display panel. The backlight module comprises a light collector, optical fibers, a fiber light-outputting substrate, a light guide plate and a light coupling device. The optical fibers are connected between the light collector and the fiber light-outputting substrate. The light guide plate is disposed at one side of the fiber light-outputting substrate. The light coupling device is disposed between the fiber light-outputting substrate and the light guide plate, wherein light diffusion recessions of the light coupling device face the light-outputting openings of the fiber light-outputting substrate. The present invention can use ambient light rays to form a backlight source.
    Type: Grant
    Filed: November 22, 2012
    Date of Patent: September 23, 2014
    Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd.
    Inventors: Chechang Hu, Hu He
  • Patent number: 8833999
    Abstract: An electronic device includes a base having two opposite sidewalls, two carriers connected pivotally and respectively to the sidewalls, and two light guide plates respectively disposed on the carriers. The carriers are rotatable relative to the base between a first position, where the carriers cooperatively define a carrier surface, and a second position, where the carriers are parallel to each other. A flexible screen is superposed on the light guide plates, is expanded to a planar state when move along with the carriers to the first position, and is folded when move along with the carriers to the second position.
    Type: Grant
    Filed: September 14, 2012
    Date of Patent: September 16, 2014
    Assignee: Wistron Corporation
    Inventors: Yi-Kai Wang, Tarng-Shiang Hu, Yu-Jung Peng, Chih-Hao Chang
  • Patent number: 8807817
    Abstract: Extended area lighting devices include a light guide and diffractive surface features on a major surface thereof. The diffractive surface features include diffractive features of different pitches in non-overlapping regions of the major surface tailored to extract guided-mode light of different colors from the light guide in different directions. The diffractive features extract light such that an ordinary user observes substantially different colors in different regions of the light guide, providing a colorful appearance. Notwithstanding this, the diffractive features also extract light such that the lighting device illuminates a reference surface, disposed at an intermediate distance from the light guide, with illumination light that is substantially uniform in color and substantially white. Optical films having diffractive features that can be used to construct such devices and light guides are also disclosed.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: August 19, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Zhaohui Yang, David S. Thompson, Vivian W. Jones