JP2007053054A - Light guide of lighting device - Google Patents

Light guide of lighting device Download PDF

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Publication number
JP2007053054A
JP2007053054A JP2005238935A JP2005238935A JP2007053054A JP 2007053054 A JP2007053054 A JP 2007053054A JP 2005238935 A JP2005238935 A JP 2005238935A JP 2005238935 A JP2005238935 A JP 2005238935A JP 2007053054 A JP2007053054 A JP 2007053054A
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Prior art keywords
light
light guide
resin material
guide paths
point
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JP2005238935A
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Japanese (ja)
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Yukitake Ishikawa
幸毅 石川
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Fujikura Ltd
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Fujikura Ltd
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  • Light Guides In General And Applications Therefor (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To emit light from a light emission portion uniformly without unevenness with a simple structure at low cost. <P>SOLUTION: One side face of a transparent sheet-like resin material 10 is regarded as a wide light emission portion 1, and the resin material 10 is cut and folded to form a plurality of light guide paths 2-5 diverging from the light emission portion 1. The ends of the light guide paths 2-5 are bundled to form a bundled portion acting as a light receiving portion 6 for receiving the light from a point light source. The light guide paths 2-5 have an equal length. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、点光源から巾の広い照明に変換する照明装置の導光体に関する。   The present invention relates to a light guide for an illuminating device that converts a point light source into wide illumination.

従来、点光源（ＬＥＤ）から発する光を側面に受けて面状発光させ、この発光によって液晶パネルを照明する導光体（板）が知られている。これは、導光体を薄い可撓性部材で形成し、ＬＥＤに向き合う導光体の側面部分を漸次厚みを持たせて形成された受光部とし、導光体の表面にＬＥＤから発せられる光の進行方向に沿って設けられた複数の光散乱部を備えたものである（特許文献１参照）。
特開２００４−２０００９３号公報（第４頁、図４） 2. Description of the Related Art Conventionally, a light guide (plate) that receives light emitted from a point light source (LED) on a side surface and emits light in a planar shape and illuminates a liquid crystal panel by this light emission is known. This is because the light guide is formed by a thin flexible member, and the side surface portion of the light guide facing the LED is formed as a light receiving portion formed with a gradual thickness, and light emitted from the LED on the surface of the light guide Are provided with a plurality of light scattering portions provided along the traveling direction (see Patent Document 1).
Japanese Patent Laying-Open No. 2004-200093 (page 4, FIG. 4)

従来の導光体では、ＬＥＤの光を入射する受光部から遠い部分は、受光部から近い部分よりも光の照射が弱くなる。したがって、導光体の面全体が均一に照射することは難しかった。   In the conventional light guide, the light irradiation is weaker in the portion far from the light receiving portion where the light from the LED is incident than in the portion near the light receiving portion. Therefore, it was difficult to uniformly irradiate the entire surface of the light guide.

そこで、本発明では、簡単な構造かつ低コストで、点光源から入射された光を巾広の照射面から均一に照射できる照明装置の導光体を提供することを目的とする。   Therefore, an object of the present invention is to provide a light guide for an illuminating device that can uniformly irradiate light incident from a point light source from a wide irradiation surface with a simple structure and low cost.

上述の目的を達成するため、本発明は、透明なシート状の樹脂素材の一側面を巾広の発光部とし、この発光部から複数の分岐する導光路を形成するように樹脂素材を切断しかつ折り曲げ、これら導光路の端部を集束させ、この集束個所を点光源からの光の受光部とし、前記導光路の長さを均一としたものである。   In order to achieve the above-mentioned object, the present invention cuts the resin material so that one side surface of the transparent sheet-shaped resin material is a wide light emitting portion and a plurality of branched light guides are formed from the light emitting portion. Further, the ends of these light guide paths are converged and bent, and the converging portion is used as a light receiving section for light from a point light source, and the length of the light guide path is made uniform.

本発明によれば、透明なシート状の樹脂素材の一側面を巾広の発光部とし、この発光部から複数の分岐する導光路を形成するように樹脂素材を切断しかつ折り曲げ、これら導光路の端部を集束させ、この集束個所を点光源からの光の受光部とし、前記導光路の長さを均一としたので、発光部から均一な照射が可能となり、構造としてもシートを切断し、折り曲げ加工するだけのものできわめて簡単となり、コストダウンを図ることもできる。   According to the present invention, one side surface of a transparent sheet-shaped resin material is a wide light-emitting portion, and the resin material is cut and bent so as to form a plurality of branched light guide paths from the light-emitting section. The end of the light is focused, and the light-receiving path of the light from the point light source is set as the light-receiving part, and the light guide path is made uniform in length. In addition, it is very easy to bend, and costs can be reduced.

以下に、本発明の好適な実施の形態について、図面を参照にして説明する。   Preferred embodiments of the present invention will be described below with reference to the drawings.

図１に示す本発明の実施形態は、透明なシート状の樹脂素材１０の一側面を巾広（この例では直線的な帯状）の発光部１とし、この発光部１から複数の分岐する導光路２〜５を形成してある。これらの導光路２〜５の形成は、１枚のシート状の樹脂素材１０を切断加工して４つの導光路２〜５を形成し、これら導光路２〜５を同一方向へ折り曲げ、途中から折り返し、各導光路２〜５の端部を集束させ、この集束個所をＬＥＤなどの点光源からの光の受光部６とした。前記各導光路２〜５の長さは均一とした。前記樹脂素材１０としては、厚さ０．３ｍｍ〜１．０ｍｍ程度のアクリル樹脂が好適に用いられる。   In the embodiment of the present invention shown in FIG. 1, one side surface of a transparent sheet-like resin material 10 is a wide (in this example, a straight belt-like) light emitting section 1, and a plurality of branched leads are formed from the light emitting section 1. Optical paths 2 to 5 are formed. These light guide paths 2 to 5 are formed by cutting one sheet-like resin material 10 to form four light guide paths 2 to 5, bending these light guide paths 2 to 5 in the same direction, The end portions of the respective light guide paths 2 to 5 were converged, and this converging portion was used as a light receiving portion 6 for light from a point light source such as an LED. The lengths of the light guide paths 2 to 5 were uniform. As the resin material 10, an acrylic resin having a thickness of about 0.3 mm to 1.0 mm is preferably used.

図２の実施形態は、樹脂素材１０を切断加工して形成された導光路２〜５を、左右に折り曲げた後に中央にそれら端部を集束されたものである。この実施形態でも各導光路２〜５の長さは均一にする。   In the embodiment of FIG. 2, the light guide paths 2 to 5 formed by cutting the resin material 10 are bent right and left, and the ends thereof are converged at the center. Also in this embodiment, the length of each light guide path 2-5 is made uniform.

図３に示す実施形態では、各導光路２〜５の端部を全て集束させず、左右の２ヶの端部同士を集束させ、２ヶ一対の端部の間にプリズム７を設け、このプリズム７にＬＥＤなどの光を入射させるものである。   In the embodiment shown in FIG. 3, the ends of the light guide paths 2 to 5 are not converged at all, the two left and right ends are converged, and a prism 7 is provided between the pair of two ends. Light such as LED is incident on the prism 7.

図４に示す実施形態では、発光部１を直線的な帯状とせず、中央部分で折り曲げ、２方向の照射方向を得るようにしたものである。この発光部１を複数個所折り曲げてジグザグ状の照射とすることもでき、円弧状の折り曲げによりＳ字状の照明も可能となる。   In the embodiment shown in FIG. 4, the light emitting unit 1 is not formed into a linear belt shape, but is bent at the center portion so as to obtain two irradiation directions. The light emitting unit 1 can be bent at a plurality of places to form zigzag irradiation, and S-shaped illumination can be performed by bending the arc.

上述した実施形態のいずれも、入射光を発光部１から照射するときにムラなく均一に照射させるため、各導光路２〜５の長さを均一にしたが、より一層の均一性を求めるならば、各導光路２〜５の幅や厚みも均一とした方がよい。なお、図示した実施形態では、導光路２〜５を４つとしたが、２つ以上であればよく、５つ以上とすることも勿論できる。このような導光体は、広告用のイルミネーション、歩道用案内標識、電子機器用、自動車用など種々の用途がある。   In any of the above-described embodiments, the lengths of the respective light guide paths 2 to 5 are made uniform in order to uniformly irradiate incident light from the light emitting unit 1, but if further uniformity is required. For example, the width and thickness of each light guide path 2-5 should be uniform. In the illustrated embodiment, the number of the light guide paths 2 to 5 is four, but it is sufficient that the number is two or more. Such light guides have various uses such as advertisement illumination, sidewalk guide signs, electronic devices, and automobiles.

第１の実施形態を示す斜視図。The perspective view which shows 1st Embodiment. 第２の実施形態を示す斜視図。The perspective view which shows 2nd Embodiment. 第３の実施形態を示す斜視図。The perspective view which shows 3rd Embodiment. 第４の実施形態を示す斜視図。The perspective view which shows 4th Embodiment.

符号の説明Explanation of symbols

１ 発光部
２〜５ 導光路
６ 受光部
１０ 樹脂素材 DESCRIPTION OF SYMBOLS 1 Light-emitting part 2-5 Light guide 6 Light-receiving part 10 Resin material

Claims (3)

透明なシート状の樹脂素材の一側面を巾広の発光部とし、
この発光部から複数の分岐する導光路を形成するように樹脂素材を切断しかつ折り曲げ、
これら導光路の端部を集束させ、
この集束個所を点光源からの光の受光部とし、
前記導光路の長さを均一としたことを特徴とする照明装置の導光体。 One side of a transparent sheet-like resin material is a wide light emitting part,
Cutting and bending the resin material to form a plurality of branched light guides from this light emitting part,
Focus the ends of these light guides,
This focusing point is used as a light receiving unit for light from a point light source.
A light guide for an illumination device, characterized in that the length of the light guide is uniform. 前記導光路の端部を全て集束させずにプリズムを介して光を各端部に入射することを特徴とする請求項１に記載の照明装置の導光体。   The light guide body of the illumination device according to claim 1, wherein light is incident on each end portion through a prism without converging all end portions of the light guide path. 前記発光部の１又は２個所以上を折り曲げて非直線的な照射としたことを特徴とする請求項１又は２に記載の照明装置の導光体。   The light guide of the illuminating device according to claim 1 or 2, wherein one or two or more portions of the light-emitting portion are bent to perform non-linear irradiation.
JP2005238935A 2005-08-19 2005-08-19 Light guide of lighting device Pending JP2007053054A (en)

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110124221A (en) * 2009-01-26 2011-11-16 플렉스 라이팅 투 엘엘씨 Illumination via flexible thin films
US8128271B2 (en) 2007-10-09 2012-03-06 Flex Lighting Ii, Llc Light coupling into films
JP2012253030A (en) * 2012-08-08 2012-12-20 Skg:Kk Lighting system
US8434909B2 (en) 2007-10-09 2013-05-07 Flex Lighting Ii, Llc Light emitting display with light mixing within a film
US8905610B2 (en) 2009-01-26 2014-12-09 Flex Lighting Ii, Llc Light emitting device comprising a lightguide film
US8917962B1 (en) 2009-06-24 2014-12-23 Flex Lighting Ii, Llc Method of manufacturing a light input coupler and lightguide
US9028123B2 (en) 2010-04-16 2015-05-12 Flex Lighting Ii, Llc Display illumination device with a film-based lightguide having stacked incident surfaces
US9103956B2 (en) 2010-07-28 2015-08-11 Flex Lighting Ii, Llc Light emitting device with optical redundancy
US9110200B2 (en) 2010-04-16 2015-08-18 Flex Lighting Ii, Llc Illumination device comprising a film-based lightguide
JPWO2014087526A1 (en) * 2012-12-06 2017-01-05 三菱電機株式会社 Light guide device
US9566751B1 (en) 2013-03-12 2017-02-14 Flex Lighting Ii, Llc Methods of forming film-based lightguides
US9645304B2 (en) 2011-03-09 2017-05-09 Flex Lighting Ii Llc Directional front illuminating device comprising a film based lightguide with high optical clarity in the light emitting region
US9690032B1 (en) 2013-03-12 2017-06-27 Flex Lighting Ii Llc Lightguide including a film with one or more bends
EP2951624B1 (en) * 2013-01-30 2019-11-20 Cree, Inc. Optical waveguides
WO2020244963A1 (en) * 2019-06-04 2020-12-10 Signify Holding B.V. An optical coupler
US11442213B2 (en) 2013-03-12 2022-09-13 Azumo, Inc. Film-based lightguide with extended coupling lightguide region
US11513274B2 (en) 2019-08-01 2022-11-29 Azumo, Inc. Lightguide with a light input edge between lateral edges of a folded strip
US11966116B2 (en) 2019-01-03 2024-04-23 Azumo, Inc. Reflective display comprising a lightguide and light turning film creating multiple illumination peaks
US11994698B2 (en) 2018-08-30 2024-05-28 Azumo, Inc. Film-based frontlight with angularly varying diffusion film
WO2024115783A1 (en) * 2022-12-02 2024-06-06 Valeo Vision Flexible surface light guide for a vehicle
US12135450B2 (en) 2018-12-11 2024-11-05 Azumo, Inc. Method of manufacturing a display using a film-based lightguide and diffusely reflective release liner

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JPH05346509A (en) * 1992-06-15 1993-12-27 Fuji Photo Film Co Ltd Light condensing guide and its production
JPH08293206A (en) * 1995-04-21 1996-11-05 Rafuooles Eng Kk Lighting system and light block for it
JP2000147218A (en) * 1998-11-06 2000-05-26 Hitachi Chem Co Ltd Planar light emitter and planar light emitter unit
JP2003207649A (en) * 2001-10-25 2003-07-25 Lumileds Lighting The Netherlands Bv Device comprising at least one light source for emitting light beam to light guide situated above light source

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05346509A (en) * 1992-06-15 1993-12-27 Fuji Photo Film Co Ltd Light condensing guide and its production
JPH08293206A (en) * 1995-04-21 1996-11-05 Rafuooles Eng Kk Lighting system and light block for it
JP2000147218A (en) * 1998-11-06 2000-05-26 Hitachi Chem Co Ltd Planar light emitter and planar light emitter unit
JP2003207649A (en) * 2001-10-25 2003-07-25 Lumileds Lighting The Netherlands Bv Device comprising at least one light source for emitting light beam to light guide situated above light source

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8128271B2 (en) 2007-10-09 2012-03-06 Flex Lighting Ii, Llc Light coupling into films
US8167461B2 (en) 2007-10-09 2012-05-01 Flex Lighting Ii, Llc Method of manufacturing a light emitting device
US8434909B2 (en) 2007-10-09 2013-05-07 Flex Lighting Ii, Llc Light emitting display with light mixing within a film
US8714781B2 (en) 2007-10-09 2014-05-06 Flex Lighting Ii, Llc Light coupling into illuminated films
US8950902B2 (en) 2007-10-09 2015-02-10 Flex Lighting Ii, Llc Light emitting device with light mixing within a film
KR20110124221A (en) * 2009-01-26 2011-11-16 플렉스 라이팅 투 엘엘씨 Illumination via flexible thin films
KR101863766B1 (en) * 2009-01-26 2018-06-01 플렉스 라이팅 투 엘엘씨 Illumination via flexible thin films
US8764262B2 (en) 2009-01-26 2014-07-01 Flex Lighting Ii, Llc Illumination via flexible thin films
US8905610B2 (en) 2009-01-26 2014-12-09 Flex Lighting Ii, Llc Light emitting device comprising a lightguide film
US8917962B1 (en) 2009-06-24 2014-12-23 Flex Lighting Ii, Llc Method of manufacturing a light input coupler and lightguide
US9110200B2 (en) 2010-04-16 2015-08-18 Flex Lighting Ii, Llc Illumination device comprising a film-based lightguide
US9028123B2 (en) 2010-04-16 2015-05-12 Flex Lighting Ii, Llc Display illumination device with a film-based lightguide having stacked incident surfaces
US9103956B2 (en) 2010-07-28 2015-08-11 Flex Lighting Ii, Llc Light emitting device with optical redundancy
US9645304B2 (en) 2011-03-09 2017-05-09 Flex Lighting Ii Llc Directional front illuminating device comprising a film based lightguide with high optical clarity in the light emitting region
JP2012253030A (en) * 2012-08-08 2012-12-20 Skg:Kk Lighting system
JPWO2014087526A1 (en) * 2012-12-06 2017-01-05 三菱電機株式会社 Light guide device
EP2951624B1 (en) * 2013-01-30 2019-11-20 Cree, Inc. Optical waveguides
US11442213B2 (en) 2013-03-12 2022-09-13 Azumo, Inc. Film-based lightguide with extended coupling lightguide region
US9566751B1 (en) 2013-03-12 2017-02-14 Flex Lighting Ii, Llc Methods of forming film-based lightguides
US9690032B1 (en) 2013-03-12 2017-06-27 Flex Lighting Ii Llc Lightguide including a film with one or more bends
US11994698B2 (en) 2018-08-30 2024-05-28 Azumo, Inc. Film-based frontlight with angularly varying diffusion film
US12135450B2 (en) 2018-12-11 2024-11-05 Azumo, Inc. Method of manufacturing a display using a film-based lightguide and diffusely reflective release liner
US11966116B2 (en) 2019-01-03 2024-04-23 Azumo, Inc. Reflective display comprising a lightguide and light turning film creating multiple illumination peaks
WO2020244963A1 (en) * 2019-06-04 2020-12-10 Signify Holding B.V. An optical coupler
US11513274B2 (en) 2019-08-01 2022-11-29 Azumo, Inc. Lightguide with a light input edge between lateral edges of a folded strip
WO2024115783A1 (en) * 2022-12-02 2024-06-06 Valeo Vision Flexible surface light guide for a vehicle
FR3142791A1 (en) * 2022-12-02 2024-06-07 Valeo Vision Flexible surface light guide for vehicle

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