TW200736756A - Light guide panel for LCD and back light unit using the same - Google Patents

Light guide panel for LCD and back light unit using the same

Info

Publication number
TW200736756A
TW200736756A TW095129266A TW95129266A TW200736756A TW 200736756 A TW200736756 A TW 200736756A TW 095129266 A TW095129266 A TW 095129266A TW 95129266 A TW95129266 A TW 95129266A TW 200736756 A TW200736756 A TW 200736756A
Authority
TW
Taiwan
Prior art keywords
light
light guide
lcd
same
guide panel
Prior art date
Application number
TW095129266A
Other languages
Chinese (zh)
Other versions
TWI324277B (en
Inventor
Jae-Han Kim
Chul-Goo Chi
Man-Suk Kim
O-Yong Jeong
Original Assignee
Cheil Ind Inc
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 Cheil Ind Inc filed Critical Cheil Ind Inc
Publication of TW200736756A publication Critical patent/TW200736756A/en
Application granted granted Critical
Publication of TWI324277B publication Critical patent/TWI324277B/en

Links

Classifications

    • 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
    • G02B6/0013—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
    • G02B6/0031—Reflecting element, sheet or layer
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Nonlinear Science (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)

Abstract

Disclosed herein is a light guide plate for a backlight unit of a liquid crystal display device, which has excellent brightness, uniformity and visibility of light. The light guide plate comprises side surfaces on which light is incident, a front surface from which the light is emitted, and a rear surface on which the light is reflected, wherein the front surface is formed with front-prisms, each having a predetermined cross-section, and the rear surface is formed with stripe-prisms, each increasing in width along with an increase in distance between the stripe-prism and the side surfaces on which the light is incident.
TW95129266A 2006-03-17 2006-08-09 Light guide panel for lcd and back light unit using the same TWI324277B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020060025038A KR100662540B1 (en) 2006-03-17 2006-03-17 Light guide panel for display panel comprising stripe-prism and back light unit for lcd

Publications (2)

Publication Number Publication Date
TW200736756A true TW200736756A (en) 2007-10-01
TWI324277B TWI324277B (en) 2010-05-01

Family

ID=37815830

Family Applications (1)

Application Number Title Priority Date Filing Date
TW95129266A TWI324277B (en) 2006-03-17 2006-08-09 Light guide panel for lcd and back light unit using the same

Country Status (4)

Country Link
KR (1) KR100662540B1 (en)
CN (1) CN100561309C (en)
TW (1) TWI324277B (en)
WO (1) WO2007108579A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8333497B2 (en) 2008-10-17 2012-12-18 Coretronic Corporation Light guide plate having micro structures arranged in geometric and stripe patterns

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100903028B1 (en) 2007-01-15 2009-06-18 제일모직주식회사 Light guide panel comprising wedge type rear prism for back light unit of tft-lcd
KR100864320B1 (en) * 2007-01-17 2008-10-20 제일모직주식회사 Light guide panel comprising step structure for back light unit of tft-lcd
US9182530B2 (en) 2010-05-31 2015-11-10 Dai Nippon Printing Co., Ltd. Light guide plate with tapering unit optical elements
CN102313195B (en) 2010-07-06 2014-06-18 乐金显示有限公司 Apparatus for fabricating light guide panel and backlight unit having the light guide panel
CN102081186A (en) * 2010-11-30 2011-06-01 深圳市华星光电技术有限公司 Backlight module and light guide plate thereof
JP5799233B2 (en) * 2011-08-23 2015-10-21 パナソニックＩｐマネジメント株式会社 Light guide plate, mold, and mold processing method
KR20140039357A (en) * 2012-09-19 2014-04-02 삼성디스플레이 주식회사 Backlight unit and display device having the same
KR102324866B1 (en) * 2015-05-26 2021-11-12 엘지디스플레이 주식회사 Back Light Unit, Liquid Crystal Display Device and Driving Method thereof
KR102664468B1 (en) * 2017-01-13 2024-05-08 삼성디스플레이 주식회사 Liquid crystal display device
CN109917636A (en) * 2017-12-13 2019-06-21 南京机器人研究院有限公司 A kind of smartwatch adjusting light transmittance
CN109920327A (en) * 2017-12-13 2019-06-21 南京机器人研究院有限公司 A kind of wearable intelligent equipment

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1152377A (en) * 1997-07-31 1999-02-26 Nitto Denko Corp Optical path control platte, surface light source device, polarizing light source device and liquid crystal display device
JP2003109417A (en) * 2000-12-12 2003-04-11 International Manufacturing & Engineering Services Co Ltd Surface light source device
KR100692203B1 (en) * 2003-01-23 2007-03-09 제일모직주식회사 Light guide panel and method for fabricating thereof and back-light assembly using the same and liquid crystal display device using the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8333497B2 (en) 2008-10-17 2012-12-18 Coretronic Corporation Light guide plate having micro structures arranged in geometric and stripe patterns

Also Published As

Publication number Publication date
WO2007108579A1 (en) 2007-09-27
CN101038392A (en) 2007-09-19
KR100662540B1 (en) 2006-12-28
CN100561309C (en) 2009-11-18
TWI324277B (en) 2010-05-01

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees