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TW200717135A - Back light unit - Google Patents

Back light unit

Info

Publication number
TW200717135A
TW200717135A TW095135830A TW95135830A TW200717135A TW 200717135 A TW200717135 A TW 200717135A TW 095135830 A TW095135830 A TW 095135830A TW 95135830 A TW95135830 A TW 95135830A TW 200717135 A TW200717135 A TW 200717135A
Authority
TW
Taiwan
Prior art keywords
guide plate
light guide
unit
back light
light
Prior art date
Application number
TW095135830A
Other languages
Chinese (zh)
Inventor
Hugo Johan Cornelissen
Jacob Bruinink
Original Assignee
Koninkl Philips Electronics Nv
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 Koninkl Philips Electronics Nv filed Critical Koninkl Philips Electronics Nv
Publication of TW200717135A publication Critical patent/TW200717135A/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
    • G02B6/0038—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
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, 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
    • G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

A back light unit (110) for a liquid crystal display is provided. The unit comprises a light guide plate (102), a reflecting surface (101) arranged parallel and adjacent to the back surface of the light guide plate. Further, the light guide plate (102) comprises an interfacing surface (104) between a first material and a second material, which interfacing surface comprises microstructures (105) which are arranged such that light is outcoupled from said light guide plate (102) towards said reflecting surface (101). By using a backlight unit of the invention, the need for diffusers between the backlight unit and the liquid crystal cell of an LCD is reduced.
TW095135830A 2005-09-30 2006-09-27 Back light unit TW200717135A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05109067 2005-09-30

Publications (1)

Publication Number Publication Date
TW200717135A true TW200717135A (en) 2007-05-01

Family

ID=37900155

Family Applications (1)

Application Number Title Priority Date Filing Date
TW095135830A TW200717135A (en) 2005-09-30 2006-09-27 Back light unit

Country Status (2)

Country Link
TW (1) TW200717135A (en)
WO (1) WO2007036877A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8735791B2 (en) 2010-07-13 2014-05-27 Svv Technology Innovations, Inc. Light harvesting system employing microstructures for efficient light trapping
US10386559B2 (en) 2013-03-29 2019-08-20 Signify Holding B.V. Light emitting device comprising wavelength converter
WO2014155227A1 (en) 2013-03-29 2014-10-02 Koninklijke Philips N.V. Light emitting device comprising wavelength converter
WO2014202726A1 (en) 2013-06-20 2014-12-24 Koninklijke Philips N.V. Light emitting device
WO2015007755A2 (en) 2013-07-19 2015-01-22 Koninklijke Philips N.V. A light emitting device and a method for dimming a light emitting device
JP6629191B2 (en) 2013-10-25 2020-01-15 シグニファイ ホールディング ビー ヴィＳｉｇｎｉｆｙ Ｈｏｌｄｉｎｇ Ｂ．Ｖ． Light emitting device
EP3100086A2 (en) 2014-05-14 2016-12-07 Philips Lighting Holding B.V. A light emitting device

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09218407A (en) * 1995-12-05 1997-08-19 Canon Inc Illumination device and liquid crystal device including the illumination device
JP4113633B2 (en) * 1999-04-20 2008-07-09 日東電工株式会社 Liquid crystal display
DE19963915A1 (en) * 1999-12-31 2001-08-09 Bosch Gmbh Robert Back lighting apparatus for backlighting a liquid crystal cell
KR20020041431A (en) * 2000-07-11 2002-06-01 미우라 아키라 Surface light source device
KR100905100B1 (en) * 2001-09-26 2009-06-30 코닌클리케 필립스 일렉트로닉스 엔.브이. An illumination device arranged to receive unpolarized light and emit polarized light, and a display system
US20030095401A1 (en) * 2001-11-20 2003-05-22 Palm, Inc. Non-visible light display illumination system and method
US20040212757A1 (en) * 2001-12-27 2004-10-28 Lee Jeong-Hwan Liquid crystal display apparatus
JP4386749B2 (en) * 2004-02-16 2009-12-16 シチズン電子株式会社 Planar light source

Also Published As

Publication number Publication date
WO2007036877A3 (en) 2007-08-02
WO2007036877A2 (en) 2007-04-05

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