TW200630705A - Light guide plate for liquid crystal display back light units and liquid crystal display back light unit using the same - Google Patents

Light guide plate for liquid crystal display back light units and liquid crystal display back light unit using the same

Info

Publication number
TW200630705A
TW200630705A TW094135280A TW94135280A TW200630705A TW 200630705 A TW200630705 A TW 200630705A TW 094135280 A TW094135280 A TW 094135280A TW 94135280 A TW94135280 A TW 94135280A TW 200630705 A TW200630705 A TW 200630705A
Authority
TW
Taiwan
Prior art keywords
liquid crystal
crystal display
display back
back light
light
Prior art date
Application number
TW094135280A
Other languages
Chinese (zh)
Other versions
TWI327249B (en
Inventor
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 TW200630705A publication Critical patent/TW200630705A/en
Application granted granted Critical
Publication of TWI327249B publication Critical patent/TWI327249B/en

Links

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
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/04—Prisms
    • G02B5/045—Prism arrays
    • 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
    • G02B6/0035—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
    • 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
    • G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides

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)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

Disclosed herein is a light guide plate for liquid crystal display (LCD) back light units having excellent brightness, uniformity, and visibility. The light guide plate comprises a main body including opposite side surfaces, upon which light is incident, and front and rear surfaces connected to the opposite side surfaces for allowing the light to exit therethrough, a plurality of front prisms, having a predetermined sectional shape, disposed at the front surface of the main body, and a plurality of dot prisms disposed lengthwise and crosswise at the rear surface of the main body such that the dot prisms are spaced a predetermined distance from each other, each of the dot prisms being provided at the surface thereof with prism parts having a predetermined sectional shape, the dot prisms being arranged in a pattern in which the sizes of the dot prisms gradually increase as the dot prisms become more distant from at least one of the opposite side surfaces, upon which the light is incident.
TW094135280A 2004-10-09 2005-10-07 Light guide plate for liquid crystal display back light units and liquid crystal display back light unit using the same TWI327249B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20040080677 2004-10-09
KR1020050084462A KR100661147B1 (en) 2004-10-09 2005-09-12 Light guide panel for LCD back light unit and LCD back light unit thereby

Publications (2)

Publication Number Publication Date
TW200630705A true TW200630705A (en) 2006-09-01
TWI327249B TWI327249B (en) 2010-07-11

Family

ID=37150068

Family Applications (1)

Application Number Title Priority Date Filing Date
TW094135280A TWI327249B (en) 2004-10-09 2005-10-07 Light guide plate for liquid crystal display back light units and liquid crystal display back light unit using the same

Country Status (2)

Country Link
KR (1) KR100661147B1 (en)
TW (1) TWI327249B (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070117077A (en) * 2006-06-07 2007-12-12 대영정공(주) Back light unit of flat panel display
KR100759690B1 (en) * 2006-07-04 2007-09-17 삼성에스디아이 주식회사 Backlight unit of a liquid crystal display device and method for fabricating a light guided panel of the same
KR101237473B1 (en) * 2006-09-29 2013-02-26 비전하이테크 주식회사 Light guide plate for controlling light path
KR100790422B1 (en) * 2006-10-20 2008-01-02 제일모직주식회사 Light guide panel for display panel comprising stripe-prism and back light unit for LCD
KR20080046313A (en) * 2006-11-22 2008-05-27 희성전자 주식회사 Lgp structure of edge-type backlight unit
KR100866898B1 (en) * 2006-11-22 2008-11-04 희성전자 주식회사 LGP structure of edge-type Backlight unit
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
KR20080085242A (en) 2007-03-19 2008-09-24 삼성전자주식회사 Light guide plate and blacklight assembly using the same
KR101318253B1 (en) 2007-03-30 2013-10-18 삼성디스플레이 주식회사 Light guide plate and display apparatus having the same
KR100947243B1 (en) * 2008-06-27 2010-03-11 주식회사 코아옵틱스 Light Guide Plate for Overlap Dot Type Mobile's Key-Pad
KR101692888B1 (en) * 2009-12-22 2017-01-05 엘지디스플레이 주식회사 Light guiding panel and back light unit using the same
KR101708479B1 (en) * 2009-12-31 2017-03-09 삼성디스플레이 주식회사 Light guide panel, display device having the same, and fabrication method of the light guide panel
KR101253987B1 (en) * 2011-11-14 2013-04-11 도레이첨단소재 주식회사 Light guiding plate for surface light source device and back light unit using the same
KR102001666B1 (en) * 2012-08-20 2019-07-19 삼성디스플레이 주식회사 Display apparatus
KR102133420B1 (en) * 2014-08-28 2020-07-14 엘지디스플레이 주식회사 Curved liquid crystal display apparatus

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06160642A (en) * 1992-11-20 1994-06-07 Taiho Ind Co Ltd Surface light source plate
JP3316441B2 (en) 1997-12-11 2002-08-19 三洋電機株式会社 Light guide plate, surface light source using the light guide plate, liquid crystal display device, and method of manufacturing light guide plate
JP2002133907A (en) 2000-10-25 2002-05-10 Seiko Epson Corp Illumination apparatus and liquid crystal device using it
KR20010074133A (en) * 2001-03-30 2001-08-04 고경진 The light guide panel for backlight
KR20030078305A (en) * 2002-03-29 2003-10-08 주식회사 엔투에이 Light Guide Plate and Backlight Unit using thereof
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
KR100580890B1 (en) * 2003-04-30 2006-05-17 비전하이테크 주식회사 Light Guide Plate capable for controlling view angle and Method for making stamper used to make the same

Also Published As

Publication number Publication date
KR100661147B1 (en) 2006-12-26
KR20060051190A (en) 2006-05-19
TWI327249B (en) 2010-07-11

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Legal Events

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