JP4823636B2 - Lighting device - Google Patents

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JP4823636B2
JP4823636B2 JP2005299309A JP2005299309A JP4823636B2 JP 4823636 B2 JP4823636 B2 JP 4823636B2 JP 2005299309 A JP2005299309 A JP 2005299309A JP 2005299309 A JP2005299309 A JP 2005299309A JP 4823636 B2 JP4823636 B2 JP 4823636B2
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light
guide plate
light guide
lighting device
pattern
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JP2007108438A (en
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茂 千崎
敏之 新井
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Toshiba Lighting and Technology Corp
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Harison Toshiba Lighting Corp
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Description

本発明は、光源からの出射光を導光板に入射させて発光面を面状発光させる照明装置に関する。   The present invention relates to an illuminating device that causes light emitted from a light source to enter a light guide plate to emit light on a light emitting surface.

従来より、導光板を用いて面状の照明光を形成する照明装置においては、例えば、車体のスカッフプレートを面発光させる所謂スカッフ照明等への適用が数多く提案されている。また、この種の照明装置においては、出射される照明光に文字や図柄等の装飾を施すための技術が数多く提案されており、例えば、特許文献１には、導光体（導光板）の発光観測面（発光面）や反対側の面（反射面）に所望形状の凹部または凸部を設けて文字部を形成する技術が開示されている。さらに、特許文献１には、文字部の外周に沿って溝部を設け、導光板内を進行する光を溝部で乱反射させることにより文字を強調する技術が開示されている。
特開２００２−１０８２５７公報 2. Description of the Related Art Conventionally, in an illuminating device that forms planar illumination light using a light guide plate, for example, many applications have been proposed for so-called scuff illumination in which a scuff plate of a vehicle body emits light. In this type of lighting device, many techniques for decorating the emitted illumination light such as letters and designs have been proposed. For example, Patent Document 1 discloses a light guide (light guide plate). A technique for forming a character part by providing a concave portion or a convex portion having a desired shape on a light emission observation surface (light emission surface) or a surface on the opposite side (reflection surface) is disclosed. Further, Patent Document 1 discloses a technique for emphasizing a character by providing a groove portion along the outer periphery of the character portion and irregularly reflecting light traveling in the light guide plate at the groove portion.
JP 2002-108257 A

ところで、この種の照明装置において、照明光に文字や図柄等の模様を施す際には、照明光にメリハリをつけて、更なる装飾性の向上を図ることが望ましい。   By the way, in this type of lighting device, when a pattern such as a character or a pattern is applied to the illumination light, it is desirable to add a sharpness to the illumination light to further improve the decorativeness.

本発明は、装飾性に富んだ照明を実現することができる照明装置を提供することを目的とする。   An object of this invention is to provide the illuminating device which can implement | achieve the illumination rich in the decorating property.

本発明の一態様による照明装置は、発光面と反射面とが互いに対向し、これらの少なくとも一側端面に入射面を有する導光板と、前記導光板の入射面に対向する光源とを備えた照明装置において、前記導光板の発光面或いは反射面の少なくとも何れか一方の面上に、粗面による所定模様を形成すると共に、前記導光板の発光面上に、前記粗面による所定模様と同様の模様をなす遮光マスクを前記粗面に重ねて配設したものである。
An illumination device according to an aspect of the present invention includes a light guide plate having a light emitting surface and a reflective surface facing each other and having an incident surface on at least one side end surface thereof, and a light source facing the incident surface of the light guide plate. a lighting device, on at least one surface of the light emitting surface or the reflection surface of the light guide plate, thereby forming a predetermined pattern by rough, on the light emitting surface of the light guide plate, similarly to the predetermined pattern by the rough surface A light shielding mask having a pattern of is overlaid on the rough surface .

本発明の照明装置によれば、装飾性に富んだ照明を実現することができる。   According to the illuminating device of the present invention, it is possible to realize illumination that is rich in decorativeness.

以下、図面を参照して本発明の実施形態を説明する。図面は本発明の第１の実施形態に係わり、図１は車両の運転席側のドア開口部を示す斜視図、図２はスカッフ照明装置の要部を示す分解斜視図、図３はスカッフプレートを除いてスカッフ照明装置の要部を示す平面図、図４は図３のＩ−Ｉ断面図、図５は図４の変形例を示す断面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. The drawings relate to a first embodiment of the present invention, FIG. 1 is a perspective view showing a door opening on a driver's seat side of a vehicle, FIG. 2 is an exploded perspective view showing a main part of a scuff lighting device, and FIG. FIG. 4 is a cross-sectional view taken along the line II of FIG. 3, and FIG. 5 is a cross-sectional view showing a modification of FIG.

図１において符号１は自動車等の車体を示し、符号２は、例えば車体１の運転席側の側部に開口するドア開口部を示す。このドア開口部２の底縁には車体骨格を構成するサイドシル５（図４参照）が配設され、このサイドシル５には、スカッフプレート７が冠設されている。   In FIG. 1, reference numeral 1 denotes a vehicle body such as an automobile, and reference numeral 2 denotes a door opening that opens, for example, on a side of the vehicle body 1 on the driver's seat side. A side sill 5 (see FIG. 4) constituting a vehicle body skeleton is disposed at the bottom edge of the door opening 2, and a scuff plate 7 is crowned on the side sill 5.

本実施形態において、スカッフプレート７は、主としてサイドシル５の上面を覆う細長の板金プレートで構成され、図４に示すように、サイドシル５との間に、後述する照明装置本体２０を収容可能な間隙１５を形成する。   In the present embodiment, the scuff plate 7 is mainly composed of an elongated sheet metal plate that covers the upper surface of the side sill 5, and as shown in FIG. 4, a gap 15 that can accommodate an illuminating device body 20 described later between the side sill 5. Form.

図１に示すように、スカッフプレート７は、ドア開成時に図示しないドアパネルの下端が対向するアウタ面部７ａと、このアウタ面部７ａよりも車幅方向内側で上方に位置するインナ面部７ｂとが段部７ｃを介して一体形成された上面を有する。そして、このスカッフプレート７のアウタ面部７ａには、例えば、車室内に配設されたシート３の前部に略対応する位置に、矩形形状をなす出射口１０が開口している。   As shown in FIG. 1, the scuff plate 7 has a stepped portion 7c having an outer surface portion 7a facing the lower end of a door panel (not shown) when the door is opened, and an inner surface portion 7b positioned on the inner side in the vehicle width direction from the outer surface portion 7a. And has an upper surface formed integrally with each other. The outer surface portion 7a of the scuff plate 7 has, for example, a rectangular emission port 10 at a position substantially corresponding to the front portion of the seat 3 disposed in the passenger compartment.

図３に示すように、照明装置本体２０は、サイドシル５とスカッフプレート７との間に介在するケース２１を有する。このケース２１は、例えば、上面が開口した扁平な樹脂成型品で構成され、内部に、ＬＥＤ収容室２２と導光室２３とを一体的に有する。   As shown in FIG. 3, the lighting device main body 20 includes a case 21 interposed between the side sill 5 and the scuff plate 7. The case 21 is made of, for example, a flat resin molded product having an open upper surface, and integrally has an LED storage chamber 22 and a light guide chamber 23 therein.

具体的に説明すると、本実施形態において、ＬＥＤ収容室２２は、例えば、車体１前後方向に長尺な平面視略矩形形状をなし、ケース２１内の車幅方向内側寄りの領域に設定されている。また、導光室２３は、ケース２１内の車幅方向外側寄りの領域に、ＬＥＤ収容室２２に隣接して設定されている。   Specifically, in the present embodiment, the LED storage chamber 22 has, for example, a substantially rectangular shape in plan view that is long in the front-rear direction of the vehicle body 1 and is set in a region in the case 21 that is closer to the inside in the vehicle width direction. Yes. Further, the light guide chamber 23 is set adjacent to the LED storage chamber 22 in an area closer to the vehicle width direction outside in the case 21.

ＬＥＤ収容室２２の長手方向両端部には、ケース２１の前後側壁からそれぞれ突出する平板状の突起２２ｂによって、互いに対向する一対の基板保持溝２２ａが形成されている。そして、基板保持溝２２ａは、例えば、青色発光する複数（例えば、４個）の表面実装型の発光ダイオード（以下、ＬＥＤと称す）３１を光源としてＬＥＤ基板３２上に実装した光源ユニット３０を、ＬＥＤ収容室２２内に保持する。さらに、ＬＥＤ収容室２２には、導光室２３との境界に沿って車体１の前後方向に延びる遮光壁としての突条２２ｃがケース２１の底面から突設されている（図２，３参照）。そして、この突条２２ｃは、各ＬＥＤ３１の出射面の下部に対向することにより、ＬＥＤ３１からの出射光のうち、ケース２１の底面に反射して間接的に導光室２３に入射する光を制限するようになっている。   A pair of substrate holding grooves 22 a facing each other are formed at both ends in the longitudinal direction of the LED housing chamber 22 by flat plate-like protrusions 22 b protruding from the front and rear side walls of the case 21. The substrate holding groove 22a includes, for example, a light source unit 30 mounted on an LED substrate 32 using a plurality of (for example, four) surface-mounted light emitting diodes (hereinafter referred to as LEDs) 31 that emit blue light as light sources. It is held in the LED storage chamber 22. Further, a protrusion 22c as a light shielding wall extending in the front-rear direction of the vehicle body 1 along the boundary with the light guide chamber 23 is provided in the LED accommodating chamber 22 so as to protrude from the bottom surface of the case 21 (see FIGS. 2 and 3). ). And this protrusion 22c opposes the lower part of the output surface of each LED31, and restrict | limits the light which injects into the light guide chamber 23 reflected in the bottom face of the case 21 among the emitted light from LED31 indirectly. It is supposed to be.

一方、導光室２３には、反射板３５と導光板３６とが重ねて収容されている。
反射板３５は、例えば、平面視形状が導光室２３と略同形の略矩形形状をなす金属板で構成され、少なくとも上面３５ａ側が鏡面加工されている。 On the other hand, a reflecting plate 35 and a light guide plate 36 are accommodated in the light guide chamber 23 in an overlapping manner.
For example, the reflection plate 35 is formed of a metal plate having a substantially rectangular shape in plan view that is substantially the same shape as the light guide chamber 23, and at least the upper surface 35 a side is mirror-finished.

導光板３６は、例えば、平面視形状が導光室２３と略同形の略矩形形状をなす扁平な透明アクリル板で構成されている。導光板３６の互いに対向する上面及び底面は、それぞれ、発光面３６ａ及び反射面３６ｂとして設定されており、さらに、これら発光面３６ａ及び反射面３６ｂに接する４つの側端面のうち、車幅方向内側でＬＥＤ３１に対向する側端面が入射面３６ｃとして設定されている。   The light guide plate 36 is made of, for example, a flat transparent acrylic plate having a substantially rectangular shape in plan view that is substantially the same shape as the light guide chamber 23. The top and bottom surfaces of the light guide plate 36 facing each other are set as a light emitting surface 36a and a reflecting surface 36b, respectively, and among the four side end surfaces in contact with the light emitting surface 36a and the reflecting surface 36b, the inner side in the vehicle width direction. The side end surface facing the LED 31 is set as the incident surface 36c.

また、図２〜図４に示すように、本実施形態において、導光板３６の発光面３６ａ上には、スカッフプレート７の出射口１０に対応する位置に、粗面３７により所定模様が形成されていると共に、粗面３７の模様に関連付けた所定模様の遮光マスク３８が配設されている。具体的に説明すると、導光板３６の発光面３６ａ上には、例えば、文字「Ａ」をかたどった３個の凹部３９が設けられ、各凹部３９の面上に、微細な凹凸からなる粗面３７が形成されている（図２〜４参照）。さらに、各凹部３９には、例えば、文字「Ａ」をかたどった遮光マスク３８が、粗面３７に重ねて配設されている。   As shown in FIGS. 2 to 4, in the present embodiment, a predetermined pattern is formed on the light emitting surface 36 a of the light guide plate 36 by the rough surface 37 at a position corresponding to the exit 10 of the scuff plate 7. In addition, a light shielding mask 38 having a predetermined pattern associated with the pattern of the rough surface 37 is provided. Specifically, on the light emitting surface 36 a of the light guide plate 36, for example, three concave portions 39 shaped like the letter “A” are provided, and on each concave portion 39, a rough surface composed of fine irregularities. 37 is formed (see FIGS. 2 to 4). Further, in each of the recesses 39, for example, a light shielding mask 38 in the shape of the letter “A” is disposed so as to overlap the rough surface 37.

このような構成において、各ＬＥＤ３１は、車体１の図示しないドアパネルの開閉に連動して点灯制御される。すなわち、例えば、各ＬＥＤ３１の点灯回路（図示せず）には、ドアパネルの開閉に連動してＯＮ／ＯＦＦするドアスイッチ等が接続されており、ドアパネルの開成によってドアスイッチがＯＮされた際に、点灯回路はバッテリ等からの電力を各ＬＥＤ３１に供給するようになっている。   In such a configuration, each LED 31 is controlled to be lighted in conjunction with opening and closing of a door panel (not shown) of the vehicle body 1. That is, for example, a lighting circuit (not shown) of each LED 31 is connected to a door switch that is turned on / off in conjunction with opening and closing of the door panel, and when the door switch is turned on by opening the door panel, The lighting circuit supplies power from a battery or the like to each LED 31.

そして、図４に示すように、ＬＥＤ３１が点灯されると、その出射光は、入射面３６ｃから導光板３６内に入射され、反射面３６ｂによる反射等を経て発光面３６ａから出射する。これにより、導光板３６の発光面３６ａは面状発光する。   As shown in FIG. 4, when the LED 31 is turned on, the emitted light enters the light guide plate 36 from the incident surface 36c, and is emitted from the light emitting surface 36a through reflection by the reflecting surface 36b. Thereby, the light emission surface 36a of the light guide plate 36 emits planar light.

その際、遮光マスク３８によって、発光面３６ａから出射する光の一部が遮光される。これにより、照明光に装飾模様（装飾文字）が形成される。   At that time, a part of the light emitted from the light emitting surface 36 a is shielded by the light shielding mask 38. Thereby, a decoration pattern (decoration character) is formed in illumination light.

また、導光板３６内を進行する光の一部が粗面３７で乱反射されると、乱反射された光の多くが、反射面３６ｂでの反射を経て、遮光マスク３８の近傍で発光面３６ａから出射する。これにより、遮光マスク３８の周囲が強調され、装飾性が向上する。すなわち、粗面３７の乱反射によって、照明光の一部が、遮光マスク３８で形成された模様に関連付けて強調される。   Further, when a part of the light traveling in the light guide plate 36 is irregularly reflected by the rough surface 37, most of the irregularly reflected light is reflected by the reflective surface 36 b and is emitted from the light emitting surface 36 a near the light shielding mask 38. Exit. Thereby, the periphery of the light shielding mask 38 is emphasized, and the decorativeness is improved. That is, part of the illumination light is emphasized in association with the pattern formed by the light shielding mask 38 by the irregular reflection of the rough surface 37.

さらに、導光板３６の反射面３６ｂに沿って配設された反射板３５の鏡面加工された上面３５ａ（対向面）に遮光マスク３８が映り込む。これにより、ユーザに装飾模様を立体的に認識させることが可能となる。   Further, the light shielding mask 38 is reflected on the mirror-finished upper surface 35 a (opposing surface) of the reflection plate 35 disposed along the reflection surface 36 b of the light guide plate 36. Thereby, it becomes possible to make a user recognize a decoration pattern in three dimensions.

また、各ＬＥＤ３１の出射面の下部に突条２２ｃを対向させることにより、ＬＥＤ３１からの出射光のうち、ケース２１の底面に反射して間接的に導光室２３（導光板３６）に入射する光が遮光される。これにより、発光面３６ａで照明光を面状発光させる際に、配光を乱す余剰な光が導光板３６内に入射することが防止され、不要な輝度ムラの発生等が抑制される。   Moreover, by making the protrusion 22c oppose the lower part of the emission surface of each LED 31, it reflects in the bottom face of the case 21 among the emitted light from LED31, and injects into the light guide chamber 23 (light guide plate 36) indirectly. Light is blocked. Thereby, when the illumination light is planarly emitted from the light emitting surface 36a, excessive light that disturbs the light distribution is prevented from entering the light guide plate 36, and the occurrence of unnecessary luminance unevenness is suppressed.

ここで、図５に示すように、本実施形態においては、粗面３７及び遮光マスク３８で形成される模様の周部に、例えば、凹部３９の側壁によってテーパ面３９ａを形成することも可能である。このような構成とすれば、導光板３６内を進行する光の一部をテーパ面３９ａで乱反射させて出射することができる。従って、発光面３６ａ上のテーパ面３９ａにおける光の出射量を他の領域よりも増加させることができ、模様の周部が強調されて、装飾性が向上する。   Here, as shown in FIG. 5, in the present embodiment, it is possible to form a tapered surface 39 a on the periphery of the pattern formed by the rough surface 37 and the light shielding mask 38, for example, by the side wall of the recess 39. is there. With such a configuration, a part of the light traveling in the light guide plate 36 can be diffusely reflected by the tapered surface 39a and emitted. Therefore, the amount of light emitted from the tapered surface 39a on the light emitting surface 36a can be increased as compared with other regions, and the peripheral portion of the pattern is emphasized to improve the decorativeness.

次に、図６乃至図８は本発明の第２の実施形態係わり、図６はスカッフ照明装置の要部を示す分解斜視図、図７はスカッフプレートを除いてスカッフ照明装置の要部を示す平面図、図８は図７のII−II断面図である。なお、本実施形態においては、発光面３６ａに代えて反射面３６ｂに粗面を形成した点が上述の第１の実施形態に対して主として異なる。その他、同様の構成については、同符号を付して説明を省略する。   Next, FIGS. 6 to 8 relate to the second embodiment of the present invention, FIG. 6 is an exploded perspective view showing the main part of the scuff lighting device, and FIG. 7 is a plan view showing the main part of the scuff lighting device except for the scuff plate. 8 and 8 are sectional views taken along line II-II in FIG. Note that the present embodiment is mainly different from the first embodiment in that a rough surface is formed on the reflection surface 36b instead of the light emitting surface 36a. In addition, about the same structure, a same sign is attached | subjected and description is abbreviate | omitted.

図６〜８に示すように、本実施形態において、導光板３６の反射面３６ｂ上には、各遮光マスク３８に対向する位置に、例えば、文字「Ａ」の鏡像をかたどった凹部５０が設けられ、各凹部５０の面上に、微細な凹凸からなる粗面５１が形成されている。   As shown in FIGS. 6 to 8, in the present embodiment, on the reflective surface 36 b of the light guide plate 36, for example, a concave portion 50 shaped like a mirror image of the letter “A” is provided at a position facing each light shielding mask 38. On the surface of each recess 50, a rough surface 51 made of fine irregularities is formed.

このような構成では、導光板３６内を進行する光が粗面５１で乱反射することにより、反射面３６ｂ上の粗面５１の形成領域があたかも発光しているように視認される。従って、模様に立体感が増し、装飾性が向上する。   In such a configuration, the light traveling in the light guide plate 36 is irregularly reflected by the rough surface 51, so that the formation region of the rough surface 51 on the reflective surface 36b is visually recognized as if it is emitting light. Accordingly, the three-dimensional effect of the pattern is increased and the decorativeness is improved.

また、本実施形態において、反射板３５には、例えば、微小な段差が周期的に形成されている。すなわち、反射板３５の上面３５ａには微小な段差によって所定デザインが形成されている。そして、反射板３５の段差によって導光板３６内を進行する光の挙動が規則的に変化することにより、発光面３６ａから出射する照明光に規則的な輝度ムラが発生させることができ照明光の装飾性がさらに向上する。   In the present embodiment, for example, minute steps are periodically formed on the reflecting plate 35. That is, a predetermined design is formed on the upper surface 35a of the reflecting plate 35 by a minute step. The behavior of the light traveling in the light guide plate 36 is regularly changed by the step of the reflecting plate 35, so that regular luminance unevenness can be generated in the illumination light emitted from the light emitting surface 36a. The decorativeness is further improved.

ここで、図６，７に示すように、本実施形態において、導光板３６の入射面３６ｃには、各ＬＥＤ３１との対向を回避する位置に、ＬＥＤ収容室２２側に突出する複数の凸片３６ｄが設けられている。なお、これら各凸片３６ｄとの干渉を回避するため、ＬＥＤ収容室２２内に設けられた突条２２ｃは、不連続に形成されている。各凸片３６ｄの先端部は、ＬＥＤ収容室２２内でＬＥＤ基板３２に当接するよう設定されており、この凸片３６ｄの当接により、ＬＥＤ基板３２は、各ＬＥＤ３１からの熱が伝達された場合にも、熱変形することが抑制されるようになっている。   Here, as shown in FIGS. 6 and 7, in the present embodiment, the incident surface 36 c of the light guide plate 36 has a plurality of protruding pieces that protrude toward the LED housing chamber 22 at positions that avoid facing the LEDs 31. 36d is provided. In order to avoid interference with the convex pieces 36d, the protrusions 22c provided in the LED housing chamber 22 are formed discontinuously. The tip of each convex piece 36d is set to abut on the LED substrate 32 in the LED accommodating chamber 22, and the LED substrate 32 receives heat from each LED 31 by the abutment of the convex piece 36d. Even in this case, thermal deformation is suppressed.

なお、上述の各実施形態で示した各構成を適宜組み合わせて照明装置を構成してもよいことは勿論である。   Needless to say, the lighting device may be configured by appropriately combining the configurations shown in the above-described embodiments.

また、遮光マスクや粗面で形成する模様は文字に限定されるものではなく、各種図柄等であってもよいことは勿論である。さらに、遮光マスク及び粗面の模様は、必ずしも、相互で一致させる必要はなく、所定の関連付られた模様であれば高い装飾性を実現することができる。   Further, the pattern formed on the light-shielding mask or the rough surface is not limited to characters, and may of course be various designs. Furthermore, the light-shielding mask and the rough surface pattern do not necessarily have to coincide with each other, and high decorativeness can be realized if the pattern is associated with a predetermined pattern.

また、上述の各実施形態においては、本発明の照明装置を車両のスカッフ照明装置として適用する一例について説明したが、本発明はこれに限定されるものではなく、例えば、家屋の表札の照明装置等にも適用が可能であることは勿論である。   In each of the above-described embodiments, an example in which the lighting device of the present invention is applied as a scuff lighting device for a vehicle has been described. However, the present invention is not limited to this, and for example, a lighting device for a house nameplate Of course, the present invention can also be applied.

また、照明装置の光源は表面実装型のＬＥＤに限定されるものではなく、その発光色も任意に選定可能である。この場合、単一の発光色の光源を導光板の入射面に対向して複数個配列する構成に代えて、発光色の異なる複数の光源を導光板の入射面に対向して配列し、発光面の位置に応じて照明光の色を変化させてもよいことは勿論である。   Further, the light source of the lighting device is not limited to the surface mount type LED, and the emission color can be arbitrarily selected. In this case, instead of a configuration in which a plurality of light sources having a single emission color are arranged opposite to the incident surface of the light guide plate, a plurality of light sources having different emission colors are arranged opposite to the incident surface of the light guide plate to emit light. Of course, the color of the illumination light may be changed according to the position of the surface.

本発明の第１の実施形態に係わり、車両の運転席側のドア開口部を示す斜視図The perspective view which concerns on the 1st Embodiment of this invention and shows the door opening part by the side of the driver's seat of a vehicle 同上、スカッフ照明装置の要部を示す分解斜視図Same as above, exploded perspective view showing the main part of the scuff lighting device 同上、スカッフプレートを除いてスカッフ照明装置の要部を示す平面図The top view which shows the principal part of a scuff illumination device except a scuff plate same as the above 同上、図３のＩ−Ｉ断面図Same as above, II sectional view of FIG. 同上、図４の変形例を示す断面図4 is a cross-sectional view showing a modification of FIG. 本発明の第２の実施形態係わり、スカッフ照明装置の要部を示す分解斜視図The exploded perspective view which shows the principal part of the scuff illuminating device in connection with the second embodiment of the present invention. 同上、スカッフプレートを除いてスカッフ照明装置の要部を示す平面図The top view which shows the principal part of a scuff illumination device except a scuff plate same as the above 同上、図７のII−II断面図Same as above, II-II sectional view of FIG.

符号の説明Explanation of symbols

２０…照明装置本体、２１…ケース、２２…ＬＥＤ収容室、２３…導光室、３０…光源ユニット、３１…発光ダイオード（光源）、３２…ＬＥＤ基板、３５…反射板、３５ａ…上面、３６…導光板、３６ａ…発光面、３６ｂ…反射面、３６ｃ…入射面、３７…粗面、３８…遮光マスク、３９…凹部、３９ａ…テーパ面、５０…凹部、５１…粗面、   DESCRIPTION OF SYMBOLS 20 ... Illuminating device main body, 21 ... Case, 22 ... LED accommodation chamber, 23 ... Light guide chamber, 30 ... Light source unit, 31 ... Light emitting diode (light source), 32 ... LED board, 35 ... Reflecting plate, 35a ... Upper surface, 36 Light guide plate 36a ... Light emitting surface 36b ... Reflective surface 36c ... Incident surface 37 ... Rough surface 38 ... Shading mask 39 ... Recessed surface 39a ... Tapered surface 50 ... Recessed surface 51 ... Rough surface

Claims (4)

発光面と反射面とが互いに対向し、これらの少なくとも一側端面に入射面を有する導光板と、前記導光板の入射面に対向する光源とを備えた照明装置において、
前記導光板の発光面或いは反射面の少なくとも何れか一方の面上に、粗面による所定模様を形成すると共に、
前記導光板の発光面上に、前記粗面による所定模様と同様の模様をなす遮光マスクを前記粗面に重ねて配設したことを特徴とする照明装置。 In a lighting device comprising a light guide plate having a light emitting surface and a reflective surface facing each other, a light guide plate having an incident surface on at least one side end surface thereof, and a light source facing the light incident surface of the light guide plate,
Forming a predetermined pattern with a rough surface on at least one of the light emitting surface and the reflecting surface of the light guide plate;
An illumination device, wherein a light shielding mask having a pattern similar to the predetermined pattern by the rough surface is disposed on the light emitting surface of the light guide plate so as to overlap the rough surface . 前記導光板は、前記粗面或いは前記遮光マスクで形成される模様の周部にテーパ面を有することを特徴とする請求項１記載の照明装置。  The lighting device according to claim 1, wherein the light guide plate has a tapered surface on a peripheral portion of the pattern formed by the rough surface or the light shielding mask. 前記光源と前記導光板との間に、前記光源から前記導光板に間接的に入射する光を遮光する遮光壁を設けたことを特徴とする請求項１または請求項２に記載の照明装置。  The lighting device according to claim 1, wherein a light-shielding wall that shields light that is indirectly incident on the light-guide plate from the light source is provided between the light source and the light-guide plate. 前記導光板の反射面に沿って配設され、前記反射面との対向面に鏡面或いは所定の凹凸デザインが形成された反射板を具備したことを特徴とする請求項１乃至請求項３の何れか１項に記載の照明装置。  4. The reflector according to claim 1, further comprising a reflector disposed along a reflection surface of the light guide plate and having a mirror surface or a predetermined uneven design formed on a surface facing the reflection surface. 5. The lighting device according to claim 1.
JP2005299309A 2005-10-13 2005-10-13 Lighting device Expired - Fee Related JP4823636B2 (en)

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