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 PDFInfo
- 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
- Authority
- 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
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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
Description
2 導光板
3,4 光反射層
5 光拡散シート
6 プリズムシート
7 FPC基板
8 筐体
9,10,11 分割領域
12,13 境界面
14,15 斜面
16 稜線
17a,17b 側面
18,19,20 微細散乱構造体
Claims (5)
- 光入射面から入射した光を光出射面に導く導光板と、前記光入射面に対向して配置された複数の点光源と、前記光出射面とは反対側の面上に内部に窪んだ凹形状で形成された複数の微細散乱構造体を備える照明装置において、
前記微細散乱構造体は光源側の斜面と、前記斜面に繋がる側面を有するとともに、前記側面が斜面で構成され、
前記点光源と前記微細散乱構造体とを結ぶ直線は、前記微細散乱構造体の長手方向と略平行で、前記光源側の斜面の基底線と直交することを特徴とする照明装置。 - 前記側面が拡散機能を備えることを特徴とする請求項1に記載の照明装置。
- 前記導光板の光出射面、または、光出射面と反対側の面が、複数の領域に分割されており、
前記複数の領域での導光板の厚みが、前記光源から遠ざかるにつれて薄くなっているとともに、前記複数の領域の境界面を境に前記微細構造体の密度が不連続に変化していることを特徴とする請求項1または2に記載の照明装置。 - 前記導光板の光出射面上に互いに離間した第二の微細散乱構造体が形成され、前記第二の微細散乱構造体と前記点光源とを結ぶ直線に対して、前記第二の微細散乱構造体の長手方向が略平行または略垂直であることを特徴とする請求項1〜3のいずれか一項に記載の照明装置。
- 請求項1〜4のいずれか一項に記載の照明装置と、前記照明装置の光照射面側に設けられた非自発光型の表示素子とを備えることを特徴とする表示装置。
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 |
---|---|---|---|
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 |
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 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2006004915A JP2006004915A (ja) | 2006-01-05 |
JP2006004915A5 JP2006004915A5 (ja) | 2008-05-15 |
JP4717494B2 true JP4717494B2 (ja) | 2011-07-06 |
Family
ID=35505849
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
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 |
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US (1) | US7366392B2 (ja) |
JP (1) | JP4717494B2 (ja) |
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KR101056980B1 (ko) * | 2005-03-16 | 2011-08-16 | 미츠비시 가스 가가쿠 가부시키가이샤 | 투명 수지제의 도광판 및 면 형상 광원 장치, 그리고도광판의 제조 방법 |
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US20080094853A1 (en) * | 2006-10-20 | 2008-04-24 | Pixtronix, Inc. | Light guides and backlight systems incorporating light redirectors at varying densities |
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- 2005-05-11 US US11/126,634 patent/US7366392B2/en active Active
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Publication number | Publication date |
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JP2006004915A (ja) | 2006-01-05 |
US7366392B2 (en) | 2008-04-29 |
US20050286854A1 (en) | 2005-12-29 |
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