JP4717494B2 - 照明装置およびこれを用いた表示装置 - Google Patents

照明装置およびこれを用いた表示装置 Download PDF

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Publication number
JP4717494B2
JP4717494B2 JP2005118224A JP2005118224A JP4717494B2 JP 4717494 B2 JP4717494 B2 JP 4717494B2 JP 2005118224 A JP2005118224 A JP 2005118224A JP 2005118224 A JP2005118224 A JP 2005118224A JP 4717494 B2 JP4717494 B2 JP 4717494B2
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JP
Japan
Prior art keywords
light
guide plate
fine scattering
scattering structure
light guide
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.)
Expired - Fee Related
Application number
JP2005118224A
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English (en)
Japanese (ja)
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JP2006004915A (ja
JP2006004915A5 (https=
Inventor
克則 本間
範宏 出島
慎 栗原
貴康 佐土
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments 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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Priority to JP2005118224A priority Critical patent/JP4717494B2/ja
Priority to US11/126,634 priority patent/US7366392B2/en
Publication of JP2006004915A publication Critical patent/JP2006004915A/ja
Publication of JP2006004915A5 publication Critical patent/JP2006004915A5/ja
Application granted granted Critical
Publication of JP4717494B2 publication Critical patent/JP4717494B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • G02B6/0045—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 by shaping at least a portion of the light guide
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
    • G02B6/0048—Tapered light guide, e.g. wedge-shaped light guide with stepwise taper
    • 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
    • G02B6/0058—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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
JP2005118224A 2004-05-20 2005-04-15 照明装置およびこれを用いた表示装置 Expired - Fee Related JP4717494B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2005118224A JP4717494B2 (ja) 2004-05-20 2005-04-15 照明装置およびこれを用いた表示装置
US11/126,634 US7366392B2 (en) 2004-05-20 2005-05-11 Lighting device and display device using the same

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2004150796 2004-05-20
JP2004150796 2004-05-20
JP2005118224A JP4717494B2 (ja) 2004-05-20 2005-04-15 照明装置およびこれを用いた表示装置

Related Child Applications (2)

Application Number Title Priority Date Filing Date
JP2010021561A Division JP4739454B2 (ja) 2004-05-20 2010-02-02 照明装置およびこれを用いた表示装置
JP2010021562A Division JP4865875B2 (ja) 2004-05-20 2010-02-02 照明装置およびこれを用いた表示装置

Publications (3)

Publication Number Publication Date
JP2006004915A JP2006004915A (ja) 2006-01-05
JP2006004915A5 JP2006004915A5 (https=) 2008-05-15
JP4717494B2 true JP4717494B2 (ja) 2011-07-06

Family

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Family Applications (1)

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JP2005118224A Expired - Fee Related JP4717494B2 (ja) 2004-05-20 2005-04-15 照明装置およびこれを用いた表示装置

Country Status (2)

Country Link
US (1) US7366392B2 (https=)
JP (1) JP4717494B2 (https=)

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WO2008051362A1 (en) * 2006-10-20 2008-05-02 Pixtronix, Inc. Light guides and backlight systems incorporating light redirectors at varying densities
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KR101565409B1 (ko) * 2009-06-02 2015-11-03 엘지전자 주식회사 Ｌｅｄ 백라이트 유닛
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JP5516319B2 (ja) * 2010-10-20 2014-06-11 ソニー株式会社 照明装置および表示装置
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US11327358B2 (en) 2017-05-08 2022-05-10 Reald Spark, Llc Optical stack for directional display
TWI878209B (zh) 2017-09-15 2025-04-01 美商瑞爾Ｄ斯帕克有限責任公司 顯示裝置及應用於顯示裝置的視角控制光學元件
US11115647B2 (en) 2017-11-06 2021-09-07 Reald Spark, Llc Privacy display apparatus
KR101926528B1 (ko) * 2017-11-13 2018-12-10 엘지디스플레이 주식회사 백라이트 유닛 및 이를 포함하는 액정표시장치모듈
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TWI827580B (zh) 2018-01-25 2024-01-01 美商瑞爾Ｄ斯帕克有限責任公司 用於防窺顯示裝置之反射式光學堆疊物
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US10955715B2 (en) 2018-06-29 2021-03-23 Reald Spark, Llc Optical stack for privacy display
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CN116520610A (zh) * 2022-01-24 2023-08-01 京东方科技集团股份有限公司 背光模组和显示装置
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JP2006004915A (ja) 2006-01-05
US20050286854A1 (en) 2005-12-29
US7366392B2 (en) 2008-04-29

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