JP2011063169A - Luminescent display device - Google Patents

Luminescent display device Download PDF

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JP2011063169A
JP2011063169A JP2009217199A JP2009217199A JP2011063169A JP 2011063169 A JP2011063169 A JP 2011063169A JP 2009217199 A JP2009217199 A JP 2009217199A JP 2009217199 A JP2009217199 A JP 2009217199A JP 2011063169 A JP2011063169 A JP 2011063169A
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light
emblem
display device
reflective layer
light guide
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JP4981862B2 (en
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Takahiro Yamaoka
貴弘 山岡
Akinori Hosomi
亜季法 細見
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Fuji Electric Devices Industries Co Ltd
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Fuji Electric Devices Industries Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a luminescent display device capable of illuminating so as to make the profile of an emblem clear. <P>SOLUTION: The luminescent display device includes a first reflective layer 4, a second reflective layer 5 provided on the front side relative to the first reflective layer 4, a light guide body 3 provided between the first reflective layer 4 and the second reflective layer 5, and an emblem 2 provided on the front side from the light guide body 3. The light guide body 3 is exposed along the edge parts 2a, 2b of the emblem 2, and has projection parts 3a, 3a projected to the front side. The groove parts 3b, 3b are formed on the back side of the light guide body 3 at the position along the edge parts 3a, 3a of the emblem 2 when seen from the thickness direction of the light guide body 3. An uneven strip 3aa is formed at the most top part of the projection parts 3a, 3a, and an uneven strip 3ba is formed on the deepest part of the groove part 3b. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、自動車等の車両に設けられるエンブレムの発光表示装置に関する。   The present invention relates to a light-emitting display device for an emblem provided in a vehicle such as an automobile.

自動車等の車両に設けられたエンブレムを夜間でも視認できるようにするため、例えば特許文献１に開示されているような発光表示装置がある。   In order to make it possible to visually recognize an emblem provided on a vehicle such as an automobile even at night, there is a light emitting display device as disclosed in Patent Document 1, for example.

特許文献１に開示されている発光表示装置は、車両の取付面から順に第１反射層、導光体（同文献では「導光本体部」と称している。）、第２反射層（同文献では「遮光層」と称している。）を形成し、さらに、導光体に光を供給するための光源を備えている。光源から出た光は、第１反射層と第２反射層との間で反射を繰り返しながら導光体内を通過し、エンブレムの縁部近傍に露出した導光体の一部から漏出する。この結果、エンブレムはその縁部近傍から漏出した光によって縁取られ、夜間には、エンブレムが空中に浮かんだように見える。   The light-emitting display device disclosed in Patent Document 1 includes a first reflective layer, a light guide (referred to as “light guide main body” in the same document), and a second reflective layer (same as those in order from the mounting surface of the vehicle). In the literature, it is referred to as a “light-shielding layer”), and further includes a light source for supplying light to the light guide. Light emitted from the light source passes through the light guide while being repeatedly reflected between the first reflective layer and the second reflective layer, and leaks from a part of the light guide exposed in the vicinity of the edge of the emblem. As a result, the emblem is bordered by light leaking from the vicinity of the edge, and at night, the emblem appears to float in the air.

特許第４２６１３７８号公報Japanese Patent No. 4261378

ところで、特許文献１に開示されている発光表示装置を含めた従来の発光表示装置を、夜間、さほど遠く離れていない場所から観察すると、エンブレムの輪郭がぼやけて見え、エンブレムを構成する文字、図形、記号等を視認しにくくなることがある。エンブレムは、周囲の者に見せることを目的として車両に設置されていることから、エンブレムの輪郭がぼやけてその構成が視認されにくくなることは好ましいことではない。   By the way, when the conventional light emitting display device including the light emitting display device disclosed in Patent Document 1 is observed from a place not far away at night, the outline of the emblem appears blurred, and the characters and figures constituting the emblem , It may be difficult to visually recognize symbols and the like. Since the emblem is installed in the vehicle for the purpose of showing it to the people around it, it is not preferable that the outline of the emblem is blurred and its configuration is not easily recognized.

本発明は、かかる事情に鑑みて創案されたものであり、エンブレムの輪郭が明瞭となるように照らすことのできる発光表示装置を提供することを目的とする。   The present invention has been made in view of such circumstances, and an object thereof is to provide a light-emitting display device that can be illuminated so that the outline of an emblem becomes clear.

上述の課題を解決するための手段として、本発明の発光表示装置は、以下のように構成されている。すなわち、本発明の発光表示装置は、第１反射層と、前記第１反射層より表側に設けられた第２反射層と、前記第１反射層と前記第２反射層との間に設けられた導光体と、前記導光体より表側に設けられたエンブレムと、を備えるものであって、前記導光体は、前記エンブレムの縁部に沿って露出した露出部を有しており、前記導光体の裏側には、その厚さ方向から視て前記エンブレムの縁部に沿う位置に、溝部が形成されていることを特徴としている。   As means for solving the above-described problems, the light-emitting display device of the present invention is configured as follows. That is, the light-emitting display device of the present invention is provided between the first reflective layer, the second reflective layer provided on the front side of the first reflective layer, and the first reflective layer and the second reflective layer. A light guide, and an emblem provided on the front side of the light guide, wherein the light guide has an exposed portion exposed along an edge of the emblem, On the back side of the light guide, a groove is formed at a position along the edge of the emblem as viewed from the thickness direction.

かかる構成を備える発光表示装置によれば、導光体の裏側には、その厚さ方向から視てエンブレムの縁部に沿う位置に、溝部が形成されているので、エンブレムの縁部近傍から漏出する光の光量が高められ、エンブレムの輪郭が明瞭となるように照らされる。   According to the light emitting display device having such a configuration, a groove is formed on the back side of the light guide body at a position along the edge of the emblem when viewed from the thickness direction, so that leakage occurs from the vicinity of the edge of the emblem. The amount of light is increased, and the emblem is illuminated so that the outline of the emblem is clear.

また、本発明の発光表示装置は、前記溝部にその長手方向に沿って延在する凹凸条が形成されていることが望ましい。   In the light emitting display device of the present invention, it is preferable that the groove is provided with an uneven strip extending in the longitudinal direction.

かかる構成を備える発光表示装置によれば、エンブレムの縁部近傍から漏出する光が散乱光となり、これにより更にエンブレムの輪郭が明瞭となるように照らされる。   According to the light-emitting display device having such a configuration, the light leaking from the vicinity of the edge of the emblem becomes scattered light, which is further illuminated so that the outline of the emblem becomes clearer.

また、本発明の発光表示装置は、前記露出部が前記エンブレムの縁部に沿って表側に突出した凸部を有することが望ましい。   In the light-emitting display device of the present invention, it is desirable that the exposed portion has a convex portion protruding to the front side along an edge portion of the emblem.

かかる構成を備える発光表示装置によれば、前記凸部から漏出する光が、導光体の非凸部から漏出する光に比べて光量や光質において相違するため、エンブレムの輪郭がさらに明瞭に照らされる。   According to the light-emitting display device having such a configuration, the light leaking from the convex portion is different in light quantity and light quality compared to the light leaking from the non-convex portion of the light guide, so that the outline of the emblem becomes clearer Illuminated.

また、本発明の発光表示装置は、前記凸部に、その長手方向に沿って延在する凹凸条が形成されていることが望ましい。   In the light-emitting display device of the present invention, it is preferable that the convex portion is provided with an uneven strip extending along the longitudinal direction.

かかる構成を備える発光表示装置によれば、凸部から漏出する光がばらばらの方向に散乱するため、様々な角度の視点に対してエンブレムの輪郭を明瞭に照らすことができる。   According to the light emitting display device having such a configuration, the light leaking from the convex portion is scattered in the scattered direction, so that the outline of the emblem can be clearly illuminated with respect to viewpoints of various angles.

また、本発明の発光表示装置は、第１反射層と、前記第１反射層より表側に設けられた第２反射層と、前記第１反射層と前記第２反射層との間に設けられた導光体と、前記導光体より表側に設けられたエンブレムと、を備えるものであって、前記導光体は、前記エンブレムの縁部に沿って露出し且つ表側に突出した凸部を有していることを特徴とするものであってもよい。   The light emitting display device of the present invention is provided between the first reflective layer, the second reflective layer provided on the front side of the first reflective layer, and the first reflective layer and the second reflective layer. A light guide and an emblem provided on the front side of the light guide, wherein the light guide has a convex portion exposed along the edge of the emblem and protruding to the front side. It may be characterized by having.

かかる構成を備える発光表示装置によれば、前記凸部から漏出する光が、導光体の非凸部から漏出する光に比べて光量や光質において相違するため、エンブレムの輪郭が明瞭に照らされる。   According to the light emitting display device having such a configuration, the light leaking from the convex portion is different in light quantity and light quality compared to the light leaking from the non-convex portion of the light guide, so that the outline of the emblem is clearly illuminated. It is.

また、本発明の発光表示装置は、前記凸部にその長手方向に沿って延在する凹凸条が形成されていることが望ましい。   In the light-emitting display device of the present invention, it is desirable that the convex and concave portions extending along the longitudinal direction are formed on the convex portion.

かかる構成を備える発光表示装置によれば、凸部から漏出する光がばらばらの方向に散乱するため、様々な角度の視点に対してエンブレムの輪郭を明瞭に照らすことができる。   According to the light emitting display device having such a configuration, the light leaking from the convex portion is scattered in the scattered direction, so that the outline of the emblem can be clearly illuminated with respect to viewpoints of various angles.

本発明の発光表示装置によれば、エンブレムの輪郭が明瞭となるように照らすことができる。   According to the light emitting display device of the present invention, the emblem can be illuminated so that the outline of the emblem becomes clear.

本発明の実施の形態に係る発光表示装置の一例を示す平面図である。It is a top view which shows an example of the light emission display apparatus which concerns on embodiment of this invention. 図１のＡ−Ａ断面図である。なお、導光体の断面を示すハッチングは省略している。It is AA sectional drawing of FIG. In addition, the hatching which shows the cross section of a light guide is abbreviate | omitted. （ａ）は図２の部分拡大図である。（ｂ）および（ｃ）は凸部に形成された凹凸条の変形例を示す部分断面図である。（ｄ）および（ｅ）は溝部に形成された凹凸条の変形例を示す部分断面図である。なお、（ａ）〜（ｅ）の全てにおいて導光体の断面を示すハッチングは省略している。(A) is the elements on larger scale of FIG. (B) And (c) is a fragmentary sectional view which shows the modification of the uneven | corrugated strip formed in the convex part. (D) And (e) is a fragmentary sectional view which shows the modification of the uneven | corrugated strip formed in the groove part. In all of (a) to (e), hatching indicating the cross section of the light guide is omitted. 本発明の他の実施形態１に係る発光表示装置の一例を示す断面図である。図１のＡ−Ａ断面図に相当する。なお、導光体の断面を示すハッチングは省略している。It is sectional drawing which shows an example of the light emission display apparatus which concerns on other Embodiment 1 of this invention. This corresponds to a cross-sectional view taken along line AA in FIG. In addition, the hatching which shows the cross section of a light guide is abbreviate | omitted. 本発明の他の実施形態２に係る発光表示装置の一例を示す断面図である。図１のＡ−Ａ断面図に相当する。なお、導光体の断面を示すハッチングは省略している。It is sectional drawing which shows an example of the light emission display apparatus which concerns on other Embodiment 2 of this invention. This corresponds to a cross-sectional view taken along line AA in FIG. In addition, the hatching which shows the cross section of a light guide is abbreviate | omitted.

以下、本発明の実施の形態について図面を参照して説明する。図１は、本発明の実施の形態に係る発光表示装置の一例を示す平面図である。図２は図１のＡ−Ａ断面図である。図３（ａ）は図２の部分拡大図である。なお、本明細書では、発光表示装置１の車両（車両本体に限らず車両に付設された部材等を含む）への取付面側を「裏側」とし、その反対側を「表側」とする。つまり、エンブレム２を見る人に近くなる方を「表側」とする。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing an example of a light emitting display device according to an embodiment of the present invention. 2 is a cross-sectional view taken along the line AA in FIG. FIG. 3A is a partially enlarged view of FIG. In the present specification, the mounting surface side of the light emitting display device 1 to the vehicle (including not only the vehicle body but also members attached to the vehicle) is referred to as “back side” and the opposite side is referred to as “front side”. In other words, the side closer to the person viewing the emblem 2 is defined as “front side”.

発光表示装置１は、図１および図２に示すように、エンブレム２、導光体３、第１反射層４、第２反射層５、遮光層６、光源７等を備えている。   As shown in FIGS. 1 and 2, the light emitting display device 1 includes an emblem 2, a light guide 3, a first reflective layer 4, a second reflective layer 5, a light shielding layer 6, a light source 7, and the like.

エンブレム２は、図１に示すように、外側に設けられた外設部２Ａと、この外設部２Ａ内に設けられた内設部２Ｂとを有している。このエンブレム２には、例えば、表面にアルミめっき等のめっき処理が施された合成樹脂などが採用される。本実施形態では、エンブレム２として、図１に示すような簡易な図形を例に挙げて説明するが、エンブレム２には、図１に示すもの以外に様々な文字、図形、記号等の形態が採用可能である。なお、図１に示すエンブレム２では、外設部２Ａは楕円状になっており、内設部２Ｂは、その外設部２Ａの中央に直線状に架設されている。   As shown in FIG. 1, the emblem 2 has an external part 2A provided on the outside and an internal part 2B provided in the external part 2A. For the emblem 2, for example, a synthetic resin having a surface plated with aluminum or the like is employed. In the present embodiment, a simple figure as shown in FIG. 1 will be described as an example of the emblem 2. However, the emblem 2 has various forms such as characters, figures, symbols, etc. other than those shown in FIG. It can be adopted. In the emblem 2 shown in FIG. 1, the outer portion 2A has an elliptical shape, and the inner portion 2B is installed in a straight line at the center of the outer portion 2A.

導光体３は、透光性を有する材料、例えば透光性を有するアクリル樹脂、ポリカーボネート樹脂などの合成樹脂で形成され、後述する第１反射層４の表側に図示しない接着剤等にて貼り付けられている。この導光体３は、その厚さ方向表側から視て（以下、同方向から視ることを「平面視」という。）、エンブレム２の外設部２Ａより若干大きい楕円形状となっている。   The light guide 3 is formed of a light-transmitting material, for example, a synthetic resin such as a light-transmitting acrylic resin or polycarbonate resin, and is attached to the front side of the first reflective layer 4 described later with an adhesive (not shown). It is attached. The light guide 3 has an elliptical shape that is slightly larger than the external portion 2A of the emblem 2 when viewed from the front side in the thickness direction (hereinafter referred to as “plan view”).

また、導光体３は、エンブレム２の内側縁部２ｂに沿って、導光体３の厚さ方向に直交する方向（以下「面方向」という。）へ所定寸法Ｓ１（図１参照）だけ露出した露出部Ｚ１と、エンブレム２の外側縁部２ａより面方向へ所定寸法Ｓ２（図１参照）だけ露出した露出部Ｚ２とを有している。   In addition, the light guide 3 has only a predetermined dimension S1 (see FIG. 1) in a direction orthogonal to the thickness direction of the light guide 3 (hereinafter referred to as “surface direction”) along the inner edge 2b of the emblem 2. It has an exposed exposed portion Z1 and an exposed portion Z2 exposed by a predetermined dimension S2 (see FIG. 1) in the surface direction from the outer edge 2a of the emblem 2.

また、導光体３は、その裏側の略中央位置に窪みを有し、その窪みが第１反射層４とともに光源７を配置するための空洞部９を形成している。さらに、導光体３の外周部３Ａは、光源７から遠ざかる方向に膨らんだ湾曲形状をなしている。   In addition, the light guide 3 has a recess at a substantially central position on the back side thereof, and the recess forms a cavity 9 for arranging the light source 7 together with the first reflective layer 4. Furthermore, the outer peripheral portion 3 </ b> A of the light guide 3 has a curved shape that swells in a direction away from the light source 7.

なお、エンブレム２に沿って形成された凸部３ａと、導光体３の裏側に形成された溝部３ｂとについては後に詳しく説明する。   In addition, the convex part 3a formed along the emblem 2 and the groove part 3b formed in the back side of the light guide 3 are demonstrated in detail later.

第１反射層４は、光に対する反射性を有するものである。この第１反射層４としては、例えば反射性を有するシートを採用することができる。この第１反射層４は、自動車等の車両（例えば車両のボンネット、ラジエータグリル、テールエンドパネルなど）の取付面１０に、図示しない両面テープ、接着剤等の取付手段（貼付手段）にて取付け（貼り付け）られている。なお、第１反射層４は、シート材以外のもの、例えば塗膜などで形成されていてもよい。   The first reflective layer 4 is reflective to light. As this 1st reflective layer 4, the sheet | seat which has reflectivity is employable, for example. The first reflective layer 4 is attached to an attachment surface 10 of a vehicle such as an automobile (for example, a vehicle bonnet, radiator grill, tail end panel, etc.) by means of attachment means (attachment means) such as double-sided tape or adhesive not shown. (Paste). In addition, the 1st reflection layer 4 may be formed with things other than a sheet material, for example, a coating film.

第２反射層５も光に対する反射性を有するものである。この第２反射層５としても、例えば反射性を有するシートを採用することができる。この第２反射層５は、その裏側が、図示しない両面テープ、接着剤等の取付手段（貼付手段）により導光体３の所定領域に取付け（貼り付け）られている。ここで、所定領域は、外設部２Ａと内設部２Ｂとで囲まれた領域１１，１１（図１参照）である。上記第２反射層５も塗膜などで形成されていてもよい。なお、非透光性の両面テープ、接着剤等が取付手段として採用される場合は、光の反射をできるだけ阻害しないように、当該取付手段は、第２反射層５の裏側のごく一部に貼付ないし塗布されることが望ましい。   The second reflective layer 5 is also reflective to light. As the second reflective layer 5, for example, a reflective sheet can be used. The back side of the second reflective layer 5 is attached (attached) to a predetermined region of the light guide 3 by attachment means (attachment means) such as a double-sided tape and an adhesive (not shown). Here, the predetermined regions are regions 11 and 11 (see FIG. 1) surrounded by the outer portion 2A and the inner portion 2B. The second reflective layer 5 may also be formed of a coating film or the like. In addition, when a non-light-transmitting double-sided tape, an adhesive agent, etc. are employ | adopted as an attachment means, the said attachment means is a very small part of the back side of the 2nd reflective layer 5 so that reflection of light may be prevented as much as possible. It is desirable to apply or apply.

遮光層６は、既述の所定領域１１，１１において第２反射層５の表側に接着剤等の取付け手段（貼付手段）により取付け（貼付け）られている。この遮光層６は、導光体３から受ける光を遮る性質を有するものである。第２反射層５および遮光層６の代わりに光に対する反射性と遮光性の双方を兼ね備えた材質からなるシート材等を採用してもよい。   The light shielding layer 6 is attached (attached) to the front side of the second reflective layer 5 by the attaching means (attaching means) such as an adhesive in the predetermined regions 11 and 11 described above. The light blocking layer 6 has a property of blocking light received from the light guide 3. Instead of the second reflective layer 5 and the light shielding layer 6, a sheet material made of a material having both light reflectivity and light shielding properties may be employed.

なお、エンブレム２が遮光性を有しない場合は、エンブレム２と第２反射層との間にも遮光層６が設けられることがある。また、エンブレム２が遮光性および反射性を兼ね備えている場合は、エンブレム２と導光体３との間の第２反射層５が省かれることがある。   When the emblem 2 does not have a light shielding property, the light shielding layer 6 may be provided between the emblem 2 and the second reflective layer. In addition, when the emblem 2 has both light shielding properties and reflectivity, the second reflective layer 5 between the emblem 2 and the light guide 3 may be omitted.

光源７としては、例えばＬＥＤ等の発光体が使用される。光源７は、空洞部９内に配置されており、当該空洞部９内には、光源７を発光させるための基盤１２も収容されている。   As the light source 7, for example, a light emitter such as an LED is used. The light source 7 is disposed in the cavity 9, and a base 12 for causing the light source 7 to emit light is also accommodated in the cavity 9.

導光体３は、既述したようにエンブレム２の縁部２ａ，２ｂに沿った露出部Ｚ１，Ｚ２を有している。露出部Ｚ１は、エンブレム２の内側縁部２ｂに沿って表側に突出した凸部３ａとされている。また、露出部Ｚ２は、その一部がエンブレム２の外側縁部２ａに沿って表側に突出した凸部３ａとされ、その余部が既述した外周部３Ａとされている。言うまでも無く凸部３ａ，３ａも透光性を有している。   The light guide 3 has exposed portions Z1 and Z2 along the edges 2a and 2b of the emblem 2 as described above. The exposed portion Z <b> 1 is a convex portion 3 a that protrudes to the front side along the inner edge 2 b of the emblem 2. Further, the exposed portion Z2 is a convex portion 3a partly projecting to the front side along the outer edge 2a of the emblem 2, and the remaining portion is the outer peripheral portion 3A described above. Needless to say, the convex portions 3a and 3a also have translucency.

凸部３ａの突出高さは、特に限定されるものではないが、図２に示すように、第２反射層５、遮光層６等より表側に突出する程度以上あることが望ましい。また、図３（ａ）に示すように、凸部３ａにはその長手方向に沿って延在する凹凸条３ａａが形成されている。この凹凸条３ａａは、同図（ａ）に示すように、凸部３ａの最頂部に設けられていることが望ましいが最頂部以外の部分に設けられていてもよい。   Although the protrusion height of the convex part 3a is not specifically limited, as shown in FIG. 2, it is desirable that the protrusion part 3a has a protrusion height higher than the second reflection layer 5, the light shielding layer 6 and the like. Moreover, as shown to Fig.3 (a), the uneven | corrugated strip 3aa extended along the longitudinal direction is formed in the convex part 3a. As shown in FIG. 3A, the uneven strip 3aa is preferably provided at the topmost portion of the convex portion 3a, but may be provided at a portion other than the topmost portion.

凸部３ａに設けられる凹凸条３ａａの断面形状は、図３（ａ）に示すように、のこ歯状となっているが、その断面形状はこれに限定されない。凹凸条３ａａの断面形状は、例えば、図３（ｂ）に示すように、複数の半円Ｒが連続して並んだ断面形状や、図３（ｃ）に示すように、斜面Ｌと円弧ｒとが交互に連続して並んだ断面形状などであってもよい。なお、図３（ｂ）、（ｃ）に示す凹凸条３ａａも凸部３ａの最頂部に設けられていることが望ましいが最頂部以外の部分に設けられていてもよい。   Although the cross-sectional shape of the uneven | corrugated strip 3aa provided in the convex part 3a is a sawtooth shape as shown to Fig.3 (a), the cross-sectional shape is not limited to this. For example, as shown in FIG. 3B, the cross-sectional shape of the uneven strip 3aa is a cross-sectional shape in which a plurality of semicircles R are continuously arranged, or a slope L and an arc r as shown in FIG. And a cross-sectional shape in which and are arranged alternately and continuously. 3 (b) and 3 (c) are also preferably provided at the top of the convex portion 3a, but may be provided at a portion other than the top.

また、導光体３の裏側には、平面視して、エンブレム２の縁部２ａ，２ｂに沿う位置に溝部３ｂが形成されている。したがって、溝部３ｂは、平面視すると、凸部３ａと重なって見える位置に形成されている。   On the back side of the light guide 3, a groove 3 b is formed at a position along the edges 2 a and 2 b of the emblem 2 in plan view. Therefore, the groove 3b is formed at a position where it can be seen to overlap the convex 3a when viewed in plan.

上記溝部３ｂは、例えば図３（ａ）に示すように、導光体３の裏側から略厚さ方向表側に立ち上がった両側面３ｂＸ，３ｂＸを有している。溝部３ｂの溝深さは、特に限定されるものではないが、図２に例示するものでは、導光体３の厚さの半分程度とされている。溝部３ｂの最深部には、その長手方向に沿って延在する凹凸条３ｂａが形成されている。この凹凸条３ｂａは、溝部３ｂの最深部に設けられていることが望ましいが最深部以外の部分に設けられていてもよい。   For example, as shown in FIG. 3A, the groove 3 b has both side surfaces 3 b </ i> X and 3 b </ i> X rising from the back side of the light guide 3 to the front side in the thickness direction. Although the groove depth of the groove part 3b is not specifically limited, In the example illustrated in FIG. 2, it is about half the thickness of the light guide 3. On the deepest part of the groove 3b, an uneven strip 3ba extending along the longitudinal direction is formed. Although this uneven | corrugated strip 3ba is desirable to be provided in the deepest part of the groove part 3b, it may be provided in parts other than the deepest part.

溝部３ｂに設けられる凹凸条３ｂａの断面形状は、図３（ａ）に示すように、のこ歯状となっているが、その断面形状はこれに限定されない。凹凸条３ｂａの断面形状は、例えば図３（ｄ）に示すように、複数の半円Ｒが連続して並んだ断面形状や、図３（ｅ）に示すように、斜面Ｌと円弧ｒとが交互に連続して並んだ断面形状などであってもよい。図３（ｄ）、（ｅ）に示す凹凸条３ｂａも溝部３ｂの最深部に設けられていることが望ましいが最深部以外の部分に設けられていてもよい。   As shown in FIG. 3A, the cross-sectional shape of the uneven strip 3ba provided in the groove 3b is a sawtooth shape, but the cross-sectional shape is not limited to this. For example, as shown in FIG. 3D, the cross-sectional shape of the concavo-convex stripe 3ba is a cross-sectional shape in which a plurality of semicircles R are continuously arranged, or a slope L and an arc r as shown in FIG. The cross-sectional shape etc. which were continuously arranged alternately may be sufficient. 3D and 3E are preferably provided at the deepest portion of the groove 3b, but may be provided at a portion other than the deepest portion.

なお、エンブレム２が図３（ａ）に示すように第２反射層５に対して両面テープ１４で取付けられた場合、凸部３ａによって、両面テープ１４を隠蔽することができる。   In addition, when the emblem 2 is attached to the 2nd reflective layer 5 with the double-sided tape 14 as shown to Fig.3 (a), the double-sided tape 14 can be concealed by the convex part 3a.

以上のように構成された発光表示装置１において、光源７を発光させると、その光は、空洞部９から導光体３に入り、その大部分は第１反射層４と第２反射層５の間を反射しながら、導光体３内を第１および第２反射層４，５が延在する方向に沿って進む。そして、遮光層６やエンブレム２が設けられていない導光体３の凸部３ａや外周部３Ａ（露出部Ｚ１，Ｚ２）より外部へ漏出する。なお、発光体７から出た光の一部は反射層４，５に当たることなく、内設部２Ｂの縁部２ｂ，２ｂに沿って形成された凸部３ａ，３ａから外部へ漏出する。   In the light emitting display device 1 configured as described above, when the light source 7 emits light, the light enters the light guide 3 from the cavity 9, and most of the light is reflected in the first reflective layer 4 and the second reflective layer 5. The light guide 3 travels along the direction in which the first and second reflective layers 4 and 5 extend, while reflecting between them. And it leaks outside from the convex part 3a and outer peripheral part 3A (exposed part Z1, Z2) of the light guide 3 in which the light shielding layer 6 and the emblem 2 are not provided. A part of the light emitted from the light emitter 7 does not hit the reflective layers 4 and 5 and leaks to the outside from the convex portions 3a and 3a formed along the edges 2b and 2b of the internal portion 2B.

光源７から出た光の一部は、外部へ漏出する途中で溝部３ｂを通過する。溝部３ｂを通過する光の一部は、図３（ａ）の矢印Ｐ１，Ｐ３に示す経路を通過する光のように、溝部３ｂの側面３ｂＸ（光源７に近い方の側面）から溝部３ｂ内の空間に入り込む。このとき、導光体３と空気（気体）との屈折率の相違により（ここでは、導光体３の屈折率の方が空気の屈折率より大きいものとする。）、矢印Ｐ１，Ｐ３に示す経路を通過する光は、溝部３ｂの側面３ｂＸに近づくように屈折する。その後、矢印Ｐ１で示す経路を通過する光は、第１反射層４で反射して、溝部３ｂに形成された凹凸条３ｂａから再び導光体３内に入り込む。一方、矢印Ｐ３で示す経路を通過する光も凹凸条３ｂａから再び導光体３内に入り込む。   A part of the light emitted from the light source 7 passes through the groove 3b while leaking to the outside. A part of the light passing through the groove 3b is in the groove 3b from the side surface 3bX (the side closer to the light source 7) of the groove 3b like the light passing through the paths indicated by arrows P1 and P3 in FIG. Get into the space. At this time, due to the difference in refractive index between the light guide 3 and air (gas) (here, the refractive index of the light guide 3 is greater than the refractive index of air), arrows P1 and P3 The light passing through the path shown is refracted so as to approach the side surface 3bX of the groove 3b. Thereafter, the light passing through the path indicated by the arrow P1 is reflected by the first reflective layer 4 and enters the light guide 3 again from the uneven strip 3ba formed in the groove 3b. On the other hand, the light passing through the path indicated by the arrow P3 also enters the light guide 3 again from the ridges 3ba.

このように、溝部３ｂの側面３ｂＸ（光源７に近い方の側面）を通過する光は、溝部３ｂの側面３ｂＸに近づくように屈折するため、導光体３の厚さ方向、すなわち、図において溝部３ｂの真上にある凸部３ａの方向へ進み易くなる。この結果、溝部３ｂが無い場合と比較して凸部３ａから漏出する光の量が多くなり、エンブレム２の輪郭が明瞭に照らされるようになる。   Thus, the light passing through the side surface 3bX of the groove portion 3b (the side surface closer to the light source 7) is refracted so as to approach the side surface 3bX of the groove portion 3b, and therefore in the thickness direction of the light guide 3, that is, in the drawing. It becomes easy to proceed in the direction of the convex portion 3a directly above the groove portion 3b. As a result, the amount of light leaking from the convex portion 3a is increased as compared with the case where there is no groove portion 3b, and the outline of the emblem 2 is clearly illuminated.

また、光源７から出た光の一部は、外部へ漏出する途中で溝部３ｂに形成された凹凸条３ｂａを通過し、ばらばらの方向へ散乱したり、凹凸条３ｂａで乱反射を起こしたりする。例えば、既述した矢印Ｐ１，Ｐ３で示す経路を通過する光は、何れも凹凸条３ｂａを通過して再び導光体３内に戻る際、ばらばらの方向へ散乱する。また、図３（ａ）の矢印Ｐ２に示す経路を通過する光は、凹凸条３ｂａに達すると、一部は凹凸条３ｂａを通り抜けるが余部が凹凸条３ｂａによってばらばらの方向へ乱反射する。この結果、凸部３ａから漏出する光が散乱光となり、エンブレム２の輪郭が明瞭に照らされるようになる。   In addition, part of the light emitted from the light source 7 passes through the uneven stripe 3ba formed in the groove 3b while leaking to the outside, and is scattered in a scattered direction, or irregular reflection is caused by the uneven stripe 3ba. For example, the light passing through the paths indicated by the arrows P1 and P3 described above scatters in a discrete direction when returning to the light guide 3 again after passing through the projections and recesses 3ba. Further, when the light passing through the path indicated by the arrow P2 in FIG. 3A reaches the concavo-convex ridge 3ba, a part of the light passes through the concavo-convex ridge 3ba, but the remaining part is irregularly reflected by the concavo-convex ridge 3ba. As a result, the light leaking from the convex portion 3a becomes scattered light, and the outline of the emblem 2 is clearly illuminated.

また、凸部３ａの最頂部にも凹凸条３ａａが設けられているため、この凹凸条３ａａから外部に漏出する際に、光は更にばらばらの方向に散乱する。このため、様々な角度の視点に対してエンブレム２の輪郭を明瞭に照らすことができる。   Moreover, since the uneven | corrugated strip 3aa is provided also in the top part of the convex part 3a, when leaking outside from this uneven strip 3aa, light is scattered further in the direction of disperse | distributed. For this reason, the outline of the emblem 2 can be clearly illuminated with respect to viewpoints of various angles.

また、凸部３ａは、導光体３が光を漏出するその他の部分（外周部３Ａ）より表側に突出しているため、外周部３Ａと比較して光量や光質（例えば散乱光の割合等）が相違する。この結果、エンブレム２の輪郭が明瞭となるように照らされる。   Moreover, since the convex part 3a protrudes to the front side from the other part (outer peripheral part 3A) from which the light guide 3 leaks light, compared with the outer peripheral part 3A, light quantity and light quality (for example, the ratio of scattered light, etc.) ) Is different. As a result, the outline of the emblem 2 is illuminated so as to be clear.

＜他の実施形態１＞
以上に本発明の最良の実施形態を説明したが、他の実施形態１として、図４に示すような発光表示装置１Ａでも一定の効果が得られる。 <Other embodiment 1>
Although the best embodiment of the present invention has been described above, as another embodiment 1, a light emitting display device 1A as shown in FIG.

すなわち、図４に示す発光表示装置１Ａは、既述の実施形態に係る発光表示装置１において、溝部３ｂを省いたものである。この発光表示装置１Ａにおいても導光体３は、エンブレム２の縁部２ａ，２ｂに沿って表側に突出した凸部３ａを有するので、エンブレム２の輪郭が明瞭となるように照らされる。   That is, the light emitting display device 1A shown in FIG. 4 is obtained by omitting the groove 3b in the light emitting display device 1 according to the above-described embodiment. Also in the light emitting display device 1A, the light guide 3 includes the convex portions 3a protruding to the front side along the edges 2a and 2b of the emblem 2, so that the outline of the emblem 2 is illuminated.

また、導光体３の凸部３ａの最頂部に凹凸条３ａａが設けられていることにより、凸部３ａから漏出する光がばらばらの方向に散乱するため、様々な角度の視点に対してエンブレム２の輪郭が明瞭となるように照らすことができる。   In addition, since the projection 3a is provided at the top of the convex portion 3a of the light guide 3, the light leaking from the convex portion 3a is scattered in the direction of disjoint. It can be illuminated so that the outline of the two becomes clear.

＜他の実施形態２＞
さらに、他の実施形態２として、図５に示すような発光表示装置１Ｂであっても一定の効果が得られる。 <Other embodiment 2>
Furthermore, as another embodiment 2, a certain effect can be obtained even in the light emitting display device 1B as shown in FIG.

すなわち、図５に示す発光表示装置１Ｂは、既述の実施形態に係る発光表示装置１において、凸部３ａを省略し、エンブレムの縁部２ｂに沿って所定幅だけ導光体３から光が漏出するよう、第２反射層５、遮光層６を排除し、導光体３の一部に露出部Ｚ１を設けたものである。このような発光表示装置１Ｂにおいても平面視でエンブレム２の縁部２ａ，２ｂに沿った位置に溝部３ｂが設けられているので、エンブレム２の縁部２ａ，２ｂ近傍から漏出する光の光量が高められ、エンブレム２の輪郭が明瞭となるように照らされる。   That is, the light-emitting display device 1B shown in FIG. 5 omits the convex portion 3a in the light-emitting display device 1 according to the above-described embodiment, and light is emitted from the light guide 3 by a predetermined width along the edge 2b of the emblem. The second reflection layer 5 and the light shielding layer 6 are excluded so as to leak out, and an exposed portion Z1 is provided in a part of the light guide 3. Also in such a light emitting display device 1B, since the groove 3b is provided at a position along the edges 2a and 2b of the emblem 2 in plan view, the amount of light leaking from the vicinity of the edges 2a and 2b of the emblem 2 is reduced. It is raised and illuminated so that the outline of the emblem 2 is clear.

また、溝部３ｂには凹凸条３ｂａが形成されているため、エンブレム２の縁部２ａ，２ｂ近傍から漏出する光を散乱光とすることができ、これにより更にエンブレム２の輪郭が明瞭となるように照らされる。   Further, since the groove 3b is formed with the ridges 3ba, the light leaking from the vicinity of the edges 2a, 2b of the emblem 2 can be used as scattered light, thereby further clarifying the outline of the emblem 2. Illuminated by.

＜他の実施形態３＞
既述の実施形態では、図２、図５に示すように、導光体３の裏側に形成された溝部３ｂは、平面視して、エンブレム２の内設部２Ｂの縁部２ａ，２ｂに沿う位置には設けられていないが、当該位置にも溝部３ｂを設けるようにしてもよい。この場合、空洞部９を形成する導光体３の裏側の窪みと溝部３ｂを形成すべき位置が干渉するときは、当該窪みに溝部３ｂが形成される（上記窪みに溝部３ｂが形成された状態については図示せず。）。 <Other embodiment 3>
In the embodiment described above, as shown in FIGS. 2 and 5, the groove 3 b formed on the back side of the light guide 3 is formed on the edges 2 a and 2 b of the internal portion 2 </ b> B of the emblem 2 in plan view. Although not provided at the position along, the groove 3b may be provided also at the position. In this case, when the recess on the back side of the light guide 3 forming the cavity 9 interferes with the position where the groove 3b is to be formed, the groove 3b is formed in the recess (the groove 3b is formed in the recess). The state is not shown.)

本発明は、例えば、自動車に取付けられるエンブレムの発光表示装置に適用することができる。   The present invention can be applied to, for example, a light-emitting display device of an emblem attached to an automobile.

１ 発光表示装置
２ エンブレム
２ａ，２ｂ 縁部
３ 導光体
３ａ 凸部
３ａａ 凹凸条
３ｂ 溝部
３ｂａ 凹凸条
４ 第１反射層
５ 第２反射層
Ｚ１，Ｚ２ 露出部 DESCRIPTION OF SYMBOLS 1 Light emitting display apparatus 2 Emblem 2a, 2b Edge part 3 Light guide 3a Convex part 3aa Concavity and convexity 3b Groove part 3ba Concavity and convexity 4 1st reflection layer 5 2nd reflection layer Z1, Z2 Exposed part

Claims (6)

第１反射層と、
前記第１反射層より表側に設けられた第２反射層と、
前記第１反射層と前記第２反射層との間に設けられた導光体と、
前記導光体より表側に設けられたエンブレムと、
を備える発光表示装置であって、
前記導光体は、前記エンブレムの縁部に沿って露出した露出部を有しており、前記導光体の裏側には、その厚さ方向から視て前記エンブレムの縁部に沿う位置に、溝部が形成されていることを特徴とする発光表示装置。 A first reflective layer;
A second reflective layer provided on the front side of the first reflective layer;
A light guide provided between the first reflective layer and the second reflective layer;
An emblem provided on the front side from the light guide;
A light emitting display device comprising:
The light guide has an exposed portion exposed along an edge of the emblem, and on the back side of the light guide, at a position along the edge of the emblem as viewed from the thickness direction thereof, A light emitting display device having a groove formed therein. 請求項１に記載の発光表示装置において、
前記溝部には、その長手方向に沿って延在する凹凸条が形成されていることを特徴とする発光表示装置。 The light emitting display device according to claim 1.
The light emitting display device according to claim 1, wherein the groove is provided with an uneven strip extending along a longitudinal direction thereof. 請求項１に記載の発光表示装置において、
前記露出部は、前記エンブレムの縁部に沿って表側に突出した凸部を有することを特徴とする発光表示装置。 The light emitting display device according to claim 1.
The light-emitting display device, wherein the exposed portion has a convex portion protruding to the front side along an edge portion of the emblem. 請求項３に記載の発光表示装置において、
前記凸部には、その長手方向に沿って延在する凹凸条が形成されていることを特徴とする発光表示装置。 The light-emitting display device according to claim 3.
The light-emitting display device is characterized in that the convex portions are provided with concave and convex stripes extending along the longitudinal direction thereof. 第１反射層と、
前記第１反射層より表側に設けられた第２反射層と、
前記第１反射層と前記第２反射層との間に設けられた導光体と、
前記導光体より表側に設けられたエンブレムと、
を備える発光表示装置であって、
前記導光体は、前記エンブレムの縁部に沿って露出し且つ表側に突出した凸部を有していることを特徴とする発光表示装置。 A first reflective layer;
A second reflective layer provided on the front side of the first reflective layer;
A light guide provided between the first reflective layer and the second reflective layer;
An emblem provided on the front side from the light guide;
A light emitting display device comprising:
The light-emitting display device according to claim 1, wherein the light guide has a convex portion that is exposed along an edge of the emblem and protrudes to the front side. 請求項５に記載の発光表示装置において、
前記凸部には、その長手方向に沿って延在する凹凸条が形成されていることを特徴とする発光表示装置。 The light emitting display device according to claim 5.
The light-emitting display device is characterized in that the convex portions are provided with concave and convex stripes extending along the longitudinal direction thereof.
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