WO2003004931A3 - Backlight using planar hologram for flat display device - Google Patents

Backlight using planar hologram for flat display device Download PDF

Info

Publication number
WO2003004931A3
WO2003004931A3 PCT/KR2002/001232 KR0201232W WO03004931A3 WO 2003004931 A3 WO2003004931 A3 WO 2003004931A3 KR 0201232 W KR0201232 W KR 0201232W WO 03004931 A3 WO03004931 A3 WO 03004931A3
Authority
WO
WIPO (PCT)
Prior art keywords
guide plate
backlight
display device
light guide
light
Prior art date
Application number
PCT/KR2002/001232
Other languages
French (fr)
Other versions
WO2003004931A2 (en
Inventor
Moon-Gyu Lee
Hwan-Young Choi
Jin-Seung Choi
Jee-Hong Min
Original Assignee
Samsung Electro Mech
Moon-Gyu Lee
Hwan-Young Choi
Jin-Seung Choi
Jee-Hong Min
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
Priority claimed from KR20020023114A external-priority patent/KR100459901B1/en
Application filed by Samsung Electro Mech, Moon-Gyu Lee, Hwan-Young Choi, Jin-Seung Choi, Jee-Hong Min filed Critical Samsung Electro Mech
Priority to US10/482,300 priority Critical patent/US7253799B2/en
Publication of WO2003004931A2 publication Critical patent/WO2003004931A2/en
Publication of WO2003004931A3 publication Critical patent/WO2003004931A3/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
    • G02B6/005—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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Diffracting Gratings Or Hologram Optical Elements (AREA)

Abstract

The backlight for a flat display device including a light source, a light guide plate and a surface hologram is provided. The light guide plate is installed at one side of the light source, and light from the light source travels in the light guide plate while being totally reflected. The surface hologram is formed on at least one surface of the light guide plate. The surface hologram has a pattern of a predetermined grating interval and a predetermined grating depth in order to diffract light at a predetermined angle toward the light guide plate.
PCT/KR2002/001232 2001-06-30 2002-06-27 Backlight using planar hologram for flat display device WO2003004931A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/482,300 US7253799B2 (en) 2001-06-30 2002-06-27 Backlight using planar hologram for flat display device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR2001/38807 2001-06-30
KR20010038807 2001-06-30
KR20020023114A KR100459901B1 (en) 2001-06-30 2002-04-26 Backlight using planar hologram for flat display device
KR2002/23114 2002-04-26

Publications (2)

Publication Number Publication Date
WO2003004931A2 WO2003004931A2 (en) 2003-01-16
WO2003004931A3 true WO2003004931A3 (en) 2003-05-15

Family

ID=26639188

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2002/001232 WO2003004931A2 (en) 2001-06-30 2002-06-27 Backlight using planar hologram for flat display device

Country Status (2)

Country Link
US (1) US7253799B2 (en)
WO (1) WO2003004931A2 (en)

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Also Published As

Publication number Publication date
WO2003004931A2 (en) 2003-01-16
US7253799B2 (en) 2007-08-07
US20040246743A1 (en) 2004-12-09

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