US20080319715A1 - Light guide plate, method of manufacturing the same, and liquid crystal display device including the same - Google Patents

Light guide plate, method of manufacturing the same, and liquid crystal display device including the same Download PDF

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Publication number
US20080319715A1
US20080319715A1 US12/113,448 US11344808A US2008319715A1 US 20080319715 A1 US20080319715 A1 US 20080319715A1 US 11344808 A US11344808 A US 11344808A US 2008319715 A1 US2008319715 A1 US 2008319715A1
Authority
US
United States
Prior art keywords
light
guide plate
light guide
reflection pattern
prism
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/113,448
Other languages
English (en)
Inventor
Hyoung-Joo Kim
Heu-Gon Kim
In-Sun Hwang
Taek-Sun SHIN
Byung-Seo Yoon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Assigned to SAMSUNG ELECTRONICS CO., LTD reassignment SAMSUNG ELECTRONICS CO., LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HWANG, IN-SUN, KIM, HEU-GON, KIM, HYOUNG-JOO, SHIN, TAEK-SUN, YOON, BYUNG-SEO
Publication of US20080319715A1 publication Critical patent/US20080319715A1/en
Priority to US12/838,560 priority Critical patent/US8540412B2/en
Priority to US14/022,697 priority patent/US8684586B2/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0058—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide
    • G02B6/0061—Means for improving the coupling-out of light from the light guide varying in density, size, shape or depth along the light guide to provide homogeneous light output intensity
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources

Definitions

  • the diffuse reflection pattern of the light guide plate may be formed in a range of about 80% to about 95% of a length from the light incident surface to the opposite surface.
  • the data driver 35 drives a data line formed on the TFT substrate 32 .
  • the data driver 35 may be mounted on a data circuit film 36 .
  • One side of the data circuit film 36 may be connected to the TFT substrate 32 and the other side thereof is connected to a printed circuit board (“PCB”) 37 .
  • the gate circuit film 34 and the data circuit film 36 shown in FIG. 3 are a chip-on-film (“COF”) or a tape carrier package (“TCP”).
  • the gate driver 33 and the data driver 35 may be mounted on the TFT substrate 32 by a chip-on-glass (“COG”) method or directly mounted on the TFT substrate 32 during the formation of the TFT.
  • COG chip-on-glass
  • the second diffuse reflection pattern 210 is formed on the light emitting surface 130 of the light guide plate 100 .
  • the second diffuse reflection pattern 210 is formed along the regions where the light emitting surface 130 meets both the lateral surfaces 140 or adjacent to the lateral surfaces 140 .
  • the second diffuse reflection pattern 210 may be formed in a triangular or quadrangular shape in the first region.
  • the second diffuse pattern 210 may be formed to have an area reduced gradually as it proceeds from the light incident surface 110 toward the opposite surface 120 .
  • the second diffuse reflection pattern 210 may be formed to have an average roughness decreased as it proceeds from the light incident surface 110 toward the opposite surface 120 .
  • the size of the prism pattern 151 is increased as a distance increases from the light incident surface 110 toward the opposite surface 120 .
  • the size/height of the intaglio prism line of the prism pattern 151 adjacent to the light incident surface 110 is relatively small and the size/height gradually increases as a distance increases from the light incident surface 110 toward the opposite surface 120 . Accordingly, the light guide plate 100 reduces the amount of light reflected toward the light emitting surface 130 by the intaglio prism lines adjacent to the light incident surface 110 and increases the amount of light closer to the opposite surface 120 by supplying the remaining light toward the opposite surface 120 .

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Planar Illumination Modules (AREA)
US12/113,448 2007-06-22 2008-05-01 Light guide plate, method of manufacturing the same, and liquid crystal display device including the same Abandoned US20080319715A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US12/838,560 US8540412B2 (en) 2007-06-22 2010-07-19 Light guide plate, method of manufacturing the same, and liquid crystal display device including the same
US14/022,697 US8684586B2 (en) 2007-06-22 2013-09-10 Light guide plate, method of manufacturing the same, and liquid crystal display device including the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2007-0061513 2007-06-22
KR1020070061513A KR101391891B1 (ko) 2007-06-22 2007-06-22 도광판, 이의 제조방법 및 이를 포함하는 액정 표시 장치

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/838,560 Division US8540412B2 (en) 2007-06-22 2010-07-19 Light guide plate, method of manufacturing the same, and liquid crystal display device including the same

Publications (1)

Publication Number Publication Date
US20080319715A1 true US20080319715A1 (en) 2008-12-25

Family

ID=40137404

Family Applications (3)

Application Number Title Priority Date Filing Date
US12/113,448 Abandoned US20080319715A1 (en) 2007-06-22 2008-05-01 Light guide plate, method of manufacturing the same, and liquid crystal display device including the same
US12/838,560 Expired - Fee Related US8540412B2 (en) 2007-06-22 2010-07-19 Light guide plate, method of manufacturing the same, and liquid crystal display device including the same
US14/022,697 Active US8684586B2 (en) 2007-06-22 2013-09-10 Light guide plate, method of manufacturing the same, and liquid crystal display device including the same

Family Applications After (2)

Application Number Title Priority Date Filing Date
US12/838,560 Expired - Fee Related US8540412B2 (en) 2007-06-22 2010-07-19 Light guide plate, method of manufacturing the same, and liquid crystal display device including the same
US14/022,697 Active US8684586B2 (en) 2007-06-22 2013-09-10 Light guide plate, method of manufacturing the same, and liquid crystal display device including the same

Country Status (3)

Country Link
US (3) US20080319715A1 (zh)
KR (1) KR101391891B1 (zh)
CN (1) CN101334500A (zh)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2237260A2 (en) * 2009-04-01 2010-10-06 LG Display Co., Ltd. Liquid crystal display and driving method thereof
US20100302802A1 (en) * 2009-05-29 2010-12-02 QUALCOMM MEMS Tecnologies, Inc. Illumination devices
US20110043724A1 (en) * 2009-08-21 2011-02-24 Tae Ho Kim Backlight unit and display device using the same
US20110051397A1 (en) * 2009-08-27 2011-03-03 Seung Choon Bae Optical assembly, backlight unit and display apparatus thereof
US20120201045A1 (en) * 2011-02-08 2012-08-09 Dai Nippon Printing Co., Ltd. Light guide plate, surface light source device and transmissive display apparatus
US8654061B2 (en) 2008-02-12 2014-02-18 Qualcomm Mems Technologies, Inc. Integrated front light solution
US20150219827A1 (en) * 2014-02-05 2015-08-06 Lg Innotek Co., Ltd. Optical member and lighting device using the same
US20170059764A1 (en) * 2015-04-20 2017-03-02 Boe Technology Group Co., Ltd. Light guide plate, backlight unit and display device
USRE47656E1 (en) 2009-08-27 2019-10-22 Lg Electronics Inc. Optical assembly, backlight unit and display apparatus thereof
CN110737135A (zh) * 2019-10-29 2020-01-31 维沃移动通信有限公司 背光源及电子设备
CN112596146A (zh) * 2020-07-01 2021-04-02 福建合信创展科技有限公司 一种基于钙钛矿量子点的导光板及其使用方法
US20230236352A1 (en) * 2022-01-27 2023-07-27 Tpk Touch Solutions (Xiamen) Inc. Light guide module and touch display device

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DE102011013206A1 (de) * 2011-03-05 2012-09-06 Diehl Aerospace Gmbh Flächenleuchte, insbesondere für Flugzugkabinen
CN102289025B (zh) * 2011-07-20 2013-07-24 深圳市华星光电技术有限公司 导光板及背光模块
US8821002B2 (en) 2011-07-20 2014-09-02 Shenzhen China Star Optoelectronics Technology Co., Ltd. Light guide plate and backlight module
US8879017B2 (en) * 2011-11-18 2014-11-04 Shenzhen China Star Optoelectronics Technology Co., Ltd. Flat panel display device and stereoscopic display device
TWI485453B (zh) * 2014-01-02 2015-05-21 Radiant Opto Electronics Corp 導光板
US9442240B2 (en) 2012-03-16 2016-09-13 Radiant Opto-Electronics Corporation Light guide plate and light source module
CN103123076B (zh) * 2013-03-01 2015-06-17 京东方科技集团股份有限公司 背光模组、液晶面板和显示装置
KR101543580B1 (ko) 2013-11-06 2015-08-11 (주)코텍 디스플레이장치
CN104035156B (zh) * 2014-03-27 2016-08-03 深圳市华星光电技术有限公司 一种导光板及侧入式背光模组
WO2022104663A1 (zh) * 2020-11-19 2022-05-27 瑞仪光电(苏州)有限公司 导光板、背光模组及显示装置

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US4729068A (en) * 1986-10-01 1988-03-01 Mitsubishi Rayon Company Ltd. Light diffusing device
US5477422A (en) * 1992-05-22 1995-12-19 Nokia Mobile Phones Limited Illuminated LCD apparatus
US5779337A (en) * 1996-05-13 1998-07-14 Konica Corporation Plane light source unit and light guide used therein
US6286971B1 (en) * 1998-12-08 2001-09-11 Nec Corporation Back-light unit for liquid crystal display
US6164791A (en) * 1999-01-07 2000-12-26 Industrial Technology Research Institute Backlight source device
US6386721B1 (en) * 1999-07-08 2002-05-14 Physical Optics Corporation Light pipe having one or more integral diffusers
US20050276073A1 (en) * 2004-05-28 2005-12-15 Eastman Kodak Company Diffusive reflector films for enhanced liquid crystal display efficiency

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8654061B2 (en) 2008-02-12 2014-02-18 Qualcomm Mems Technologies, Inc. Integrated front light solution
EP2237260A2 (en) * 2009-04-01 2010-10-06 LG Display Co., Ltd. Liquid crystal display and driving method thereof
EP2237260A3 (en) * 2009-04-01 2010-11-24 LG Display Co., Ltd. Liquid crystal display and driving method thereof
US20100302802A1 (en) * 2009-05-29 2010-12-02 QUALCOMM MEMS Tecnologies, Inc. Illumination devices
US20110043724A1 (en) * 2009-08-21 2011-02-24 Tae Ho Kim Backlight unit and display device using the same
US20110050556A1 (en) * 2009-08-27 2011-03-03 Seung Choon Bae Optical assembly, backlight unit and display apparatus thereof
USRE47656E1 (en) 2009-08-27 2019-10-22 Lg Electronics Inc. Optical assembly, backlight unit and display apparatus thereof
US8403511B2 (en) 2009-08-27 2013-03-26 Lg Electronics Inc. Optical assembly, backlight unit and display apparatus thereof
US20110051397A1 (en) * 2009-08-27 2011-03-03 Seung Choon Bae Optical assembly, backlight unit and display apparatus thereof
US8672498B2 (en) 2009-08-27 2014-03-18 Lg Electronics Inc. Optical assembly, backlight unit and display apparatus thereof
US20110050735A1 (en) * 2009-08-27 2011-03-03 Seung Choon Bae Optical assembly, backlight unit and display apparatus thereof
US9140929B2 (en) * 2009-08-27 2015-09-22 Lg Electronics Inc. Optical assembly, backlight unit and display apparatus thereof
US20120201045A1 (en) * 2011-02-08 2012-08-09 Dai Nippon Printing Co., Ltd. Light guide plate, surface light source device and transmissive display apparatus
US8550687B2 (en) * 2011-02-08 2013-10-08 Dai Nippon Printing Co., Ltd. Light guide plate, surface light source device and transmissive display apparatus
US20150219827A1 (en) * 2014-02-05 2015-08-06 Lg Innotek Co., Ltd. Optical member and lighting device using the same
US10151869B2 (en) * 2014-02-05 2018-12-11 Lg Innotek Co., Ltd. Optical member and lighting device using the same
US20170059764A1 (en) * 2015-04-20 2017-03-02 Boe Technology Group Co., Ltd. Light guide plate, backlight unit and display device
CN110737135A (zh) * 2019-10-29 2020-01-31 维沃移动通信有限公司 背光源及电子设备
CN112596146A (zh) * 2020-07-01 2021-04-02 福建合信创展科技有限公司 一种基于钙钛矿量子点的导光板及其使用方法
US20230236352A1 (en) * 2022-01-27 2023-07-27 Tpk Touch Solutions (Xiamen) Inc. Light guide module and touch display device
US11754770B2 (en) * 2022-01-27 2023-09-12 Tpk Touch Solutions (Xiamen) Inc. Light guide module and touch display device

Also Published As

Publication number Publication date
US8684586B2 (en) 2014-04-01
US20140009725A1 (en) 2014-01-09
US20100277951A1 (en) 2010-11-04
KR20080112737A (ko) 2008-12-26
CN101334500A (zh) 2008-12-31
US8540412B2 (en) 2013-09-24
KR101391891B1 (ko) 2014-05-07

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