JP2009211858A - Method of introducing light into light-emitting light guide - Google Patents

Method of introducing light into light-emitting light guide Download PDF

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JP2009211858A
JP2009211858A JP2008051675A JP2008051675A JP2009211858A JP 2009211858 A JP2009211858 A JP 2009211858A JP 2008051675 A JP2008051675 A JP 2008051675A JP 2008051675 A JP2008051675 A JP 2008051675A JP 2009211858 A JP2009211858 A JP 2009211858A
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light
emitting
light guide
guide
incident
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興治 ▲さき▼山
Koji Sakiyama
Mitsuru Uekatano
充 上片野
Takashi Ichikawa
貴司 市川
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Fujikura Ltd
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Fujikura Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To make light of one light source incident on a plurality of light-emitting light guides by suppressing light attenuation. <P>SOLUTION: One side surface of a square column-shaped transparent member is used as a light-emitting surface, and on a side surface facing this light-emitting surface, at least ends of first and second luminous light transmission bodies are arranged abutting on each other, on which groove strips orthogonal to the length direction are formed in a plurality of rows along the length direction, then the light from a light source is made incident from the end of the first light-emitting light guide, which is not abutted on that of the second light-emitting light guide, while the light is made incident on the second light-emitting light guide from the end of the first light-emitting light guide, which is abutted on that of the second light-emitting light guide. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、複数の部材に設けられたそれぞれの発光導光体への光導入方法に関する。   The present invention relates to a method for introducing light into each light-emitting light guide provided on a plurality of members.

従来の光導入方法の一例としては、図８に示すように、スカッフプレート１０が、発光部材１１と、導光板１２と、光源部１３と、ケース１４と、カバー１５と、裏面反射板１６とを有し、発光部材１１は、断面が正方形の角柱状の透明なアクリルよりなる。角柱の１つの側面が発光面１７となる。そして、発光面１７に背向した側面１８には発光部材１１の長さ方向に垂直な方向に延びる溝条１９が、発光部材１１の長さ方向に沿って形成されている。軸方向の一方から他方に進むにつれて溝条１９の深さが深くなるように形成されている。つまり、一方の端部側から溝条１９の深さ（側面１８の表面から底面までの深さ）は、他方の端部側の溝条１９の深さ（側面１８の表面から底面までの深さ）より浅く形成されている。導光板１２は、軸方向の長さが発光部材１１の長さと略一致する長さの帯状の透明なアクリル板よりなる。導光板１２は、裏面側からくぼんだ凹部を有している。凹部は、所定の形状となるように形成されている。そして、凹部を区画する側壁面は、導光板１２の表面に対して傾斜した状態で形成されている。また、凹部を区画する底面は、表面と平行に形成されている。導光板１２は、軸方向に延びる１つの側面が発光部材１１の発光面１７に対向した状態で配置される。   As an example of a conventional light introduction method, as shown in FIG. 8, the scuff plate 10 includes a light emitting member 11, a light guide plate 12, a light source unit 13, a case 14, a cover 15, and a back reflector 16. The light emitting member 11 is made of transparent acrylic prismatic prism having a square cross section. One side surface of the prism is the light emitting surface 17. A groove 19 extending in the direction perpendicular to the length direction of the light emitting member 11 is formed on the side surface 18 facing away from the light emitting surface 17 along the length direction of the light emitting member 11. The groove 19 is formed so that the depth of the groove 19 becomes deeper from one axial direction to the other. That is, the depth of the groove 19 from one end side (the depth from the surface of the side surface 18 to the bottom surface) is the depth of the groove 19 on the other end side (the depth from the surface of the side surface 18 to the bottom surface). A) It is formed shallower. The light guide plate 12 is made of a strip-shaped transparent acrylic plate whose length in the axial direction is substantially the same as the length of the light emitting member 11. The light guide plate 12 has a recess recessed from the back side. The recess is formed to have a predetermined shape. And the side wall surface which divides a recessed part is formed in the state inclined with respect to the surface of the light-guide plate 12. As shown in FIG. In addition, the bottom surface that defines the recess is formed in parallel with the surface. The light guide plate 12 is arranged with one side surface extending in the axial direction facing the light emitting surface 17 of the light emitting member 11.

光源部１３は、発光ダイオード１３Ａよりなる。発光ダイオード１３Ａは、発光部材１１の軸方向の一方の端面に対向した状態で配置される。発光ダイオード１３Ａは、スカッフプレート１０の外部にもうけられた電源（図示せず）と電気的に接続され、電源からの電力により発光する。発光ダイオード１３Ａが発光した光は、発光部材１１の軸方向の一方の端面に照射される。裏面反射板１６は、導光板１２の裏面に対向した状態で配置されている。裏面反射板１６は、アルミニウム板よりなる。また、導光板１２の側面以外の側面に対向した位置にも、光を反射する側面反射層（図示せず）がもうけられている。ケース１４は、発光部材１１、導光板１２および光源部１３を保持し、固定する。カバー１５は、ケース１４に固定されたときに、導光板１２の凹部が形成された部分を露出し、それ以外の部分を被覆する。
特開２００７−１４５０８２号公報（第６頁、図１） The light source unit 13 includes a light emitting diode 13A. The light emitting diode 13 </ b> A is disposed in a state of facing the one end surface in the axial direction of the light emitting member 11. The light emitting diode 13A is electrically connected to a power source (not shown) provided outside the scuff plate 10, and emits light by power from the power source. The light emitted from the light emitting diode 13 </ b> A is applied to one end surface of the light emitting member 11 in the axial direction. The back reflector 16 is arranged in a state of facing the back of the light guide plate 12. The back reflector 16 is made of an aluminum plate. A side reflection layer (not shown) that reflects light is also provided at a position facing the side surface other than the side surface of the light guide plate 12. The case 14 holds and fixes the light emitting member 11, the light guide plate 12, and the light source unit 13. When the cover 15 is fixed to the case 14, the portion where the concave portion of the light guide plate 12 is formed is exposed and the other portions are covered.
JP 2007-145082 A (Page 6, FIG. 1)

特許文献１に開示された発光部材１１が発光導光体を構成しているが、この１つの発光導光体を発光させるには、１つの光源を必要とし、複数の発光導光体を１つの光源で発光させることはできなかった。そのため、光源が複数になると、光源に電源を供給する配線材等の部品も必要になっていた。   The light-emitting member 11 disclosed in Patent Document 1 constitutes a light-emitting light guide, but one light source is required to emit light from this one light-emitting light guide, and a plurality of light-emitting light guides 1 It was not possible to emit light with two light sources. For this reason, when there are a plurality of light sources, parts such as wiring members for supplying power to the light sources are also required.

そこで、本発明は、複数の発光導光体に１つの光源から光を導入させることのできる方法を提供することを目的とする。   Therefore, an object of the present invention is to provide a method capable of introducing light from a single light source into a plurality of light emitting light guides.

上述の目的を達成するため、角柱状の透明部材の一側面を発光面とし、この発光面に背向した側面に長さ方向に直交する溝条を長さ方向に沿って複数列形成した少なくとも第１と第２の発光導光体の端部同士を突き合わせて配置し、第１の発光導光体の突き合わされていない端部から光源からの光を入射させ、第１の発光導光体の付き合わされた端部から第２の発光導光体に光を入射させるものである。   In order to achieve the above object, at least one side surface of a prismatic transparent member is used as a light emitting surface, and a plurality of rows of grooves extending in the length direction are formed on the side surface facing the light emitting surface along the length direction. First and second light-emitting light guides are arranged so as to face each other, light from the light source is incident from the end of the first light-emitting light guide that is not faced, and the first light-emitting light guide The light is incident on the second light-emitting light guide from the end portion where the two are attached.

本発明は、角柱状の透明部材の一側面を発光面とし、この発光面に背向した側面に長さ方向に直交する溝条を長さ方向に沿って複数列形成した少なくとも第１と第２の発光導光体の端部同士を突き合わせて配置し、第１の発光導光体の突き合わされていない端部から光源からの光を入射させるものであるから、複数の発光導光体に１つの光源からの光を入射させることができ、複数の光源を用いることによる配線材等の部品増加も不要となり、安価に提供できる。また、前記第１と第２の発光導光体の溝条は光源から遠くなるほど溝条の深さを深くして第１の発光導光体に入射した光を第２の発光導光体に光の減衰を抑えて入射させるものでは、光の減衰が少ない。   According to the present invention, at least the first and the first ones in which one side surface of a prismatic transparent member is used as a light emitting surface, and a plurality of grooves extending in the length direction are formed on the side surface facing the light emitting surface along the length direction. Since the ends of the two light-emitting light guides are arranged to face each other and light from the light source is incident from the non-butted end of the first light-emitting light guide, Light from one light source can be made incident, and it is not necessary to increase the number of parts such as wiring materials by using a plurality of light sources, which can be provided at low cost. Further, the grooves of the first and second light-emitting light guides become deeper as the distance from the light source increases and the light incident on the first light-emitting light guide is made into the second light-emitting light guide. In the case of the light incident with the light attenuation suppressed, the light attenuation is small.

以下に、本発明の好適な実施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において、第１の発光導光体１と第２の発光導光体２とをそれぞれの端部同士を突き合わせて配置し（図面上Ａ部）、第１の発光導光体１の突き合わされていない端部から光源３からの光を入射する。第１及び第２の発光導光体１、２は、断面が正方形の角柱状の透明なアクリルから形成され、角柱の１つの側面が発光面１Ａ、２Ａとなり、発光面１Ａ、２Ａに背向した側面には溝条１Ｂ、２Ｂが形成されている。これらの溝条１Ｂ、２Ｂは、長さ方向に直交する方向に刻まれ、光源３から遠ざかる方向に進むにつれて溝条１Ｂ、２Ｂの深さａが深くなっている。２つの発光導光体１、２をつないだ総延長距離Ｌに対し、溝条１Ｂ、２Ｂの深さａは、図２のグラフに示す関係になっている。この実施形態では、溝条１Ｂ、２Ｂの間における深さａの変化は、光の入射側から出射側に向かって滑らかに除々に深くなっている。   In FIG. 1, a first light-emitting light guide 1 and a second light-emitting light guide 2 are arranged with their end portions abutted against each other (A portion on the drawing), and the first light-emitting light guide 1 is protruded. Light from the light source 3 is incident from an end portion that is not aligned. The first and second light-emitting light guides 1 and 2 are formed of a prismatic transparent acrylic having a square cross section, and one side surface of the prism is the light emitting surfaces 1A and 2A, and faces away from the light emitting surfaces 1A and 2A. Grooves 1B and 2B are formed on the side surfaces. These grooves 1B and 2B are engraved in a direction orthogonal to the length direction, and the depth a of the grooves 1B and 2B becomes deeper as the distance from the light source 3 increases. The depth a of the grooves 1B and 2B is in the relationship shown in the graph of FIG. 2 with respect to the total extended distance L connecting the two light-emitting light guides 1 and 2. In this embodiment, the change in the depth a between the grooves 1B and 2B is gradually and gradually deepened from the light incident side toward the light emission side.

図３、４に示す他の実施形態では、第１の発光導光体１の光源３から一番遠い溝条１Ｂの深さａと第２の発光導光体２の図面上左端の溝条２Ｂの深さａとの差が大きくなるように設定してある。この実施形態では、一度第１の発光導光体１から光が出射され、この出射された光が第２の発光導光体２に入射するため、このときの減衰が大きくなるが、図１、２の実施形態に比べて、溝条２Ｂの深さが深いために、減衰を少なくすることができる。図２及び図４のＡ部での光減衰を考慮し、溝条２ＢをＡ部以降深くすることで、第１と第２の発光導光体１、２を均一に発光させることができる。この例では、光の通る最後の溝条１Ｂ（図面上右端）と最初の溝条２Ｂ（図面上左端）との深さａの差は、１．７〜２．４倍とした。   In other embodiments shown in FIGS. 3 and 4, the depth a of the groove 1B furthest from the light source 3 of the first light-emitting light guide 1 and the groove at the left end of the second light-emitting light guide 2 in the drawing. The difference from the depth a of 2B is set to be large. In this embodiment, since light is once emitted from the first light-emitting light guide 1 and this emitted light is incident on the second light-emitting light guide 2, the attenuation at this time increases, but FIG. Compared with the second embodiment, since the groove 2B is deep, attenuation can be reduced. In consideration of light attenuation at the A part in FIGS. 2 and 4, the first and second light-emitting light guides 1 and 2 can emit light uniformly by making the groove 2 </ b> B deeper after the A part. In this example, the difference in depth a between the last groove 1B through which light passes (the right end on the drawing) and the first groove 2B (the left end on the drawing) is 1.7 to 2.4 times.

図５に示すものは、第１の発光導光体１の光が出射する端部１Ｃを凸形状に形成し、出射する光を集光させるようにしたものである。これにより、光漏れが少なくなり、第２の発光導光体２への光の入射効率を向上させる。   In FIG. 5, the end portion 1C from which the light from the first light-emitting light guide 1 is emitted is formed in a convex shape so that the emitted light is condensed. As a result, light leakage is reduced and the efficiency of light incidence on the second light-emitting light guide 2 is improved.

図６に示すのものは、第１の発光導光体１の光出射端部に集光機能をもったレンズ４を設け、第２の発光導光体２の光を受ける端部にも受光機能をもったレンズ５を設けたものであり、光漏れを極力減らしている。   The lens shown in FIG. 6 is provided with a lens 4 having a condensing function at the light emitting end of the first light-emitting light guide 1, and also received at the end receiving the light of the second light-emitting light guide 2. A lens 5 having a function is provided to reduce light leakage as much as possible.

図７に示すものは、第２の発光導光体２を大きくしたもので、光の入射面積が拡大し、より一層光漏れが少なくなるものである。第１の発光導光体１の出射端部１Ｃを凸形状としたが、図１と同じ形状であってもよく、レンズ４を設けてもよい。この例では、第１の発光導光体１の断面積よりも、第２の発光導光体２の入射端の断面積を１．５倍程度大きくした。   In FIG. 7, the second light-emitting light guide 2 is enlarged, the light incident area is enlarged, and light leakage is further reduced. Although the emission end portion 1C of the first light-emitting light guide 1 has a convex shape, it may have the same shape as in FIG. In this example, the cross-sectional area of the incident end of the second light-emitting light guide 2 is made about 1.5 times larger than the cross-sectional area of the first light-emitting light guide 1.

上述した図２と図４の実施形態では、第１の発光導光体１の溝条１Ｂも、第２の発光導光体２の溝条２Ｂも、その深さは光源から遠くなるほど深く形成したが、第２の発光導光体２の入射端寄りの溝条２Ｂの深さが、第１の発光導光体１の出射端寄りの溝条１Ｂの深さよりも深くなっていれば、第１の発光導光体１から第２の発光導光体２への光の受け渡しが必要十分なものとなる。この条件下、溝条１Ｂの深さが一定の場合もあり、溝条２Ｂの深さが一定の場合もあり、さらには両方の溝条１Ｂ、２Ｂの深さが一定の場合もある。   2 and 4 described above, the groove 1B of the first light-emitting light guide 1 and the groove 2B of the second light-emitting light guide 2 are formed deeper as the distance from the light source increases. However, if the depth of the groove 2B near the incident end of the second light-emitting light guide 2 is deeper than the depth of the groove 1B near the output end of the first light-emitting light guide 1, Delivery of light from the first light-emitting light guide 1 to the second light-emitting light guide 2 is necessary and sufficient. Under these conditions, the depth of the groove 1B may be constant, the depth of the groove 2B may be constant, or the depth of both grooves 1B, 2B may be constant.

本発明に係る方法は、車両のドアミラーの支持部と可動部、グローブボックスの本体と蓋、インストゥルメント・パネル本体とオーディオパネルのように、２つの部材間にわたって１つの光源から光を導光するような場合に適用して好適である。   The method according to the present invention guides light from one light source between two members, such as a support part and a movable part of a vehicle door mirror, a glove box body and lid, an instrument panel body and an audio panel. It is suitable to be applied to such cases.

本発明の実施形態を示す正面図。The front view which shows embodiment of this invention. 図１の溝条の深さを示すグラフ。The graph which shows the depth of the groove of FIG. 他の実施形態を示す正面図。The front view which shows other embodiment. 図３の溝条の深さを示すグラフ。The graph which shows the depth of the groove of FIG. 出射部先端を凸形状にした例を示す正面図。The front view which shows the example which made the radiation | emission part front-end | tip convex. レンズを用いた例を示す正面図。The front view which shows the example using a lens. 第２の発光導光体の入射端部を第１の出射端部よりも大きくした例を示す正面図。The front view which shows the example which made the incident end part of the 2nd light emission light guide larger than the 1st output end part. 従来例を示す分解斜視図。The exploded perspective view which shows a prior art example.

符号の説明Explanation of symbols

１ 第１の発光導光体
２ 第２の発光導光体
３ 光源
１Ａ、２Ａ 発光面
１Ｂ、２Ｂ 溝条
４、５ レンズ DESCRIPTION OF SYMBOLS 1 1st light emission light guide 2 2nd light emission light guide 3 Light source 1A, 2A Light emission surface 1B, 2B Groove | channel 4, 5 Lens

Claims (6)

角柱状の透明部材の一側面を発光面とし、この発光面に背向した側面に長さ方向に直交する溝条を長さ方向に沿って複数列形成した少なくとも第１と第２の発光導光体の端部同士を突き合わせて配置し、
第１の発光導光体の突き合わされていない端部から光源からの光を入射させ、
第１の発光導光体の突き合わされた端部から第２の発光導光体に光を入射させる発光導光体への光導入方法。 At least first and second light-emitting guides in which one side surface of a prismatic transparent member is a light-emitting surface, and a plurality of grooves are formed along the length direction on the side surface facing the light-emitting surface. Place the ends of the light bodies together,
Incident light from the light source from the unmatched end of the first light-emitting light guide,
A method for introducing light into a light-emitting light guide, in which light is incident on the second light-emitting light guide from an abutted end of the first light-emitting light guide. 前記第１の発光導光体の光が出射する側の端部を凸形状に形成したことを特徴とする請求項１に記載の発光導光体への光導入方法。   2. The method for introducing light into the light-emitting light guide according to claim 1, wherein an end of the first light-emitting light guide from which light is emitted is formed in a convex shape. 前記第１の発光導光体の光が出射する側の端部にレンズを設けるとともに、第２の発光導光体の光が入射する端部にもレンズを設けたことを特徴とする請求項１又は２に記載の発光導光体への光導入方法。   A lens is provided at an end of the first light-emitting light guide on the side from which light is emitted, and a lens is also provided at an end of the second light-emitting light guide from which light enters. A method for introducing light into the light-emitting light guide according to 1 or 2. 前記第２の発光導光体の光が入射する側の断面積を第１の発光導光体の光が出射する側の断面積よりも大きく形成したことを特徴とする請求項１ないし３のいずれか１項に記載の発光導光体への光導入方法。   4. The cross-sectional area on the light incident side of the second light-emitting light guide is formed larger than the cross-sectional area on the light-emitting side of the first light emitting light guide. The method for introducing light into the light-emitting light guide according to any one of the above items. 前記第２の発光導光体の入射端寄りの溝条の深さは、第１の発光導光体の出射端寄りの溝条の深さよりも深く形成したことを特徴とする請求項１ないし４のいずれか１項に記載の発光導光体への光導入方法。   The depth of the groove near the incident end of the second light-emitting light guide is formed deeper than the depth of the groove near the output end of the first light-emitting light guide. 5. The method for introducing light into the light-emitting light guide according to any one of 4 above. 前記第１又は／及び第２の発光導光体の溝条の深さは、光源から遠くなるほど深く形成したことを特徴とする請求項１ないし５のいずれか１項に記載の発光導光体への光導入方法。   6. The light emitting light guide according to claim 1, wherein a depth of the groove of the first or / and the second light emitting light guide is formed so as to be farther from the light source. 6. To introduce light into
JP2008051675A 2008-03-03 2008-03-03 Method of introducing light into light-emitting light guide Pending JP2009211858A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011044396A (en) * 2009-08-24 2011-03-03 Sakae Riken Kogyo Co Ltd Lighting fixture for vehicle

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JPH07114024A (en) * 1993-10-19 1995-05-02 Tosoh Corp Back light
JP2001509307A (en) * 1997-01-28 2001-07-10 ミネソタ マイニング アンド マニュファクチャリング カンパニー Fiber optic lighting equipment
JP2004022223A (en) * 2002-06-13 2004-01-22 Denso Corp Lighting system
JP2004095390A (en) * 2002-08-30 2004-03-25 Fujitsu Display Technologies Corp Lighting device and display device
JP2004158460A (en) * 1997-09-04 2004-06-03 Univ Of British Columbia Light extraction mechanism and module installed in light guide
JP2007052930A (en) * 2005-08-15 2007-03-01 Fujikura Ltd Light guide body for belt-like light source and its manufacturing method, belt-like light source equipped with light guide body for belt-like light source, and belt-like illumination device provided with light guide body for belt-like light source

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Publication number Priority date Publication date Assignee Title
JPH07114024A (en) * 1993-10-19 1995-05-02 Tosoh Corp Back light
JP2001509307A (en) * 1997-01-28 2001-07-10 ミネソタ マイニング アンド マニュファクチャリング カンパニー Fiber optic lighting equipment
JP2004158460A (en) * 1997-09-04 2004-06-03 Univ Of British Columbia Light extraction mechanism and module installed in light guide
JP2004022223A (en) * 2002-06-13 2004-01-22 Denso Corp Lighting system
JP2004095390A (en) * 2002-08-30 2004-03-25 Fujitsu Display Technologies Corp Lighting device and display device
JP2007052930A (en) * 2005-08-15 2007-03-01 Fujikura Ltd Light guide body for belt-like light source and its manufacturing method, belt-like light source equipped with light guide body for belt-like light source, and belt-like illumination device provided with light guide body for belt-like light source

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011044396A (en) * 2009-08-24 2011-03-03 Sakae Riken Kogyo Co Ltd Lighting fixture for vehicle

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