JPH0424801B2 - - Google Patents
Info
- Publication number
- JPH0424801B2 JPH0424801B2 JP59236689A JP23668984A JPH0424801B2 JP H0424801 B2 JPH0424801 B2 JP H0424801B2 JP 59236689 A JP59236689 A JP 59236689A JP 23668984 A JP23668984 A JP 23668984A JP H0424801 B2 JPH0424801 B2 JP H0424801B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- light emitting
- back cover
- emitting diode
- heat dissipation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Led Device Packages (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は発光ダイオードを光源として利用した
車輛用灯具に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vehicle lamp using a light emitting diode as a light source.
［従来の技術］
近年、半導体技術の発達により輝度の高い発光
ダイオードが開発され、しかも安価に入手できる
ようになつたことから車輛用灯具、特に方向指示
灯、後退灯、尾灯等の光源として白熱電球の代わ
りに使用されるに至つており、その一例として実
開昭57−112405号公報、実開昭58−34301号公報
等が開示されている。[Prior art] In recent years, with the development of semiconductor technology, high-brightness light-emitting diodes have been developed, and they have become available at low prices.Incandescent light-emitting diodes have been used as light sources for vehicle lighting, especially turn signals, reverse lights, taillights, etc. They have come to be used in place of light bulbs, and examples thereof are disclosed in Japanese Utility Model Application Publications No. 112405/1982 and No. 34301/1988.
［発明が解決しようとする課題］
しかし、このような従来の灯具にあつては各発
光ダイオードが点光源を構成し、その上発光出力
の指向性を有するため、前面レンズの発光ダイオ
ードに対応する部分が対応しない部分に比べてよ
り明るく照明され、均一照明という点で問題があ
つた。また、発光ダイオードは白熱電球に比べて
発熱が著しく少ないという大きな特徴を有するも
のの、数百個にも及ぶ発光ダイオードを組み込ん
だ大型灯具においては発熱が問題となり、それな
りの熱対策を講じる必要があつた。[Problems to be Solved by the Invention] However, in such conventional lamps, each light emitting diode constitutes a point light source, and furthermore, since it has directivity of light emitting output, the light emitting diode of the front lens Areas were illuminated more brightly than non-corresponding areas, creating problems with uniform illumination. Furthermore, although light emitting diodes have the great feature of generating significantly less heat than incandescent light bulbs, heat generation becomes a problem in large lamps that incorporate hundreds of light emitting diodes, and it is necessary to take appropriate heat countermeasures. Ta.
［課題を解決するための手段］
本発明は上記したような従来の問題点に鑑みて
なされたもので、バツクカバーと前面レンズとで
形成された灯室内に多数の発光ダイオードを配設
した車輛用用灯具において、前記発光ダイオード
へ通電する給電路を透明な絶縁体上に配設し、こ
の絶縁体の背面に放熱板を配設し、放熱板の表面
を反斜面に形成すると共に、表面で前記発光ダイ
オードに対応する部分を、裏面側が凸となる凹部
に形成し、且つ前記放熱板とバツクカバーとの間
に隙間を設けたものである。[Means for Solving the Problems] The present invention has been made in view of the above-mentioned conventional problems, and is intended for vehicles in which a large number of light emitting diodes are arranged in a light chamber formed by a back cover and a front lens. In the light-emitting diode, a power supply path for supplying electricity to the light-emitting diode is disposed on a transparent insulator, a heat sink is disposed on the back side of the insulator, and the surface of the heat sink is formed into a reverse slope, and the surface A portion corresponding to the light emitting diode is formed as a concave portion with a convex rear side, and a gap is provided between the heat sink and the back cover.
［作用］
本発明において、放熱板の凹部内壁面は発光ダ
イオードから出た光を前方に効率的に反射する。
放熱板は、表面側に凹部が形成され、これに対応
して裏面側が凸部を形成しているので、表面積が
大きく、点灯時の発熱を効率的に放熱する。放熱
板とバツクカバーとの間に形成された隙間は、空
気の流通を良好にし、放熱効果を高める。[Function] In the present invention, the inner wall surface of the concave portion of the heat sink efficiently reflects the light emitted from the light emitting diode forward.
The heat dissipation plate has a concave portion formed on the front side and a corresponding convex portion on the back side, so it has a large surface area and efficiently radiates heat generated during lighting. The gap formed between the heat sink and the back cover improves air circulation and enhances the heat radiation effect.
［実施例］
以下、本発明を図面に示す実施例に基づいて詳
細に説明する。[Example] Hereinafter, the present invention will be described in detail based on an example shown in the drawings.
第１図は本発明を自動車の尾灯に適用した場合
の一実施例を示す一部破断斜視図、第２図は要部
拡大断面図である。これらの図において、１は自
動車の後部コーナー部に取付けられた尾灯で、バ
ツクカバー２、バンクカバー２の前面を覆う如く
該カバー２に取付けられた前面レンズ３、バツク
カバー３と前面レンズ３によつて形成された灯室
４内に配設された絶縁体５、多数の発光ダイオー
ド６および放熱板７等によつて構成されている。 FIG. 1 is a partially cutaway perspective view showing an embodiment in which the present invention is applied to a tail light of an automobile, and FIG. 2 is an enlarged sectional view of the main part. In these figures, reference numeral 1 denotes a tail light attached to the rear corner of a car, a back cover 2, a front lens 3 attached to the cover 2 so as to cover the front of the bank cover 2, and a back cover 3 and a front lens 3. It is composed of an insulator 5, a large number of light emitting diodes 6, a heat sink 7, etc. arranged in the formed lamp chamber 4.
前記バツクカバー２はプラスチツク材料によつ
て左右方向に長い板状体に形成されて車体本体に
取付けられ、車体側方側端には車体本体に沿つて
折り曲げられた折曲部２Ａが一体に設けられてい
る。 The back cover 2 is formed of a plastic material into a plate-like body that is long in the left-right direction and is attached to the vehicle body, and is integrally provided with a bent portion 2A that is bent along the vehicle body at the side end of the vehicle body. ing.
前記前面レンズ３は、アクリル樹脂等の透光性
を有するプラスチツク材料によつて背面側に開放
する浅箱状に形成され、その周縁部が図示しない
止めねじ、ガスケツト等によつて前記バツクカバ
ー２に固定され、その一部周縁にはバツクカバー
２との間に通気孔８が形成されている。また、前
面レンズ３の車体側方側端にはバツクカバー２の
折曲部２Ａと同様、車体側面に沿つて折曲された
折曲部３Ａが一体に設けられ、これによつて回り
込みレンズを形成している。そして、前面レンズ
３はその表面を車体色と同一色の遮光膜９によつ
てマスキング塗装されることにより、縦、横方向
に所定の間隔をおいて設けられた多数の左右方向
に長い光透過部１０を有しており、それ以外の部
分は不透過部とされる一方、内面には多数の凸レ
ンズ１１が密集して形成されている。 The front lens 3 is made of a translucent plastic material such as acrylic resin and is formed into a shallow box shape that opens to the back side, and its peripheral edge is attached to the back cover 2 by a set screw, gasket, etc. (not shown). It is fixed, and a ventilation hole 8 is formed in a part of its periphery between it and the back cover 2. Furthermore, a bent portion 3A that is bent along the side of the vehicle body is integrally provided at the side end of the front lens 3 on the side of the vehicle body, similar to the bent portion 2A of the back cover 2, thereby forming a wraparound lens. are doing. The front lens 3 has its surface coated with a masking film 9 of the same color as the vehicle body, so that a large number of horizontally long light transmitting layers are provided at predetermined intervals in the vertical and horizontal directions. The other portions are non-transparent, and a large number of convex lenses 11 are densely formed on the inner surface.
前記放熱板７は、発光ダイオード６の発熱を放
熱するための機能と発光ダイオード６から出た後
方に向かう光を前方に反射させるための機能を有
するもので、例えばアルミニウム等の軽くて放熱
特性に優れた金属板により全体形状がバツクカバ
ー２の内面形状と略一致するようＬ字形に屈曲形
成され、表面が鏡面仕上げされるか塗装もしくは
蒸着によつて反射膜が形成されるか、あるいはま
たホツトスタンプ方法によつてアルミ箔が固着さ
れることにより反射面を形成している。また、放
熱板７の表面には、前記発光ダイオード６を収納
する多数の例えば逆台形状の凹部３０が、裏面側
が台形状の凸部３０Ａとなるよう、前記各光透過
部１０に対して１個ないし数個づつ対応する如く
形成されている。そして、放熱板７は、その端部
が前面レンズ３の端部内側面に固定されることに
より、バツクカバー２の内側面と凸部３０Ａとの
間に通気孔８と連通する適宜な隙間Ｇが形成され
ている。 The heat sink 7 has the function of dissipating the heat generated by the light emitting diode 6 and the function of reflecting the backward light emitted from the light emitting diode 6 forward, and is made of a material such as aluminum, which is lightweight and has good heat dissipation properties. A superior metal plate is bent into an L-shape so that its overall shape roughly matches the inner shape of the back cover 2, and the surface is mirror-finished, a reflective film is formed by painting or vapor deposition, or it is hot-stamped. A reflective surface is formed by fixing aluminum foil using a method. Further, on the surface of the heat dissipation plate 7, a large number of, for example, inverted trapezoidal concave portions 30 for accommodating the light emitting diodes 6 are arranged one for each of the light transmitting portions 10 so that the back surface side is a trapezoidal convex portion 30A. They are formed so that one or several pieces correspond to each other. The end of the heat dissipation plate 7 is fixed to the inner surface of the end of the front lens 3, thereby forming an appropriate gap G communicating with the ventilation hole 8 between the inner surface of the back cover 2 and the convex portion 30A. has been done.
前記絶縁体５は透明なプラスチツクシートから
なり、前記放熱板７の表面に密着固定（但し、図
おいては便宜上離間させている）されるもので、
そのため表面には前記発光ダイオード６を収納す
る多数の凹部３１が前記凹部３０に対応して形成
され、また各発光ダイオード６へ通電する給電路
としての導電箔１４が多数形成されている。導電
箔１４は発光ダイオード６群の各列間にそれぞれ
位置して尾灯１の上下方向に長く延在している。
そして、発光ダイオード６は前記各凹部３１の底
面中央に配列され、各列毎にその一側、例えば第
２図左方に位置する導電箔１４に対して金線１５
によつて直列に接続されている。 The insulator 5 is made of a transparent plastic sheet, and is closely fixed to the surface of the heat sink 7 (however, it is spaced apart in the figure for convenience).
Therefore, a large number of recesses 31 for accommodating the light emitting diodes 6 are formed on the surface corresponding to the recesses 30, and a large number of conductive foils 14 are formed as power supply paths for supplying electricity to each light emitting diode 6. The conductive foil 14 is located between each row of the 6 groups of light emitting diodes and extends long in the vertical direction of the taillight 1.
The light emitting diodes 6 are arranged at the center of the bottom surface of each recess 31, and the gold wire 15 is placed in each row against the conductive foil 14 located on one side of the recess 31, for example, on the left side in FIG.
are connected in series by.
このような構成からなる尾灯において、発光ダ
イオード６を一斉に発光させると、赤色の光を発
して前面レンズ３の光透過部１０より外部に出射
し、該レンズを赤く照明する。また、ブレーキ時
にはライトスツチの切替により回路抵抗が変化
し、そのため発光ダイオード６は全て同一の明る
さでしかも通常発光時より明るく発光し、後続車
輛への注意を喚起する。 In the taillight having such a configuration, when the light emitting diodes 6 are made to emit light all at once, red light is emitted and is emitted to the outside through the light transmitting portion 10 of the front lens 3, illuminating the lens in red. Further, during braking, the circuit resistance changes due to switching of the light switch, so that the light emitting diodes 6 all emit light of the same brightness and brighter than normal light emission, thereby calling attention to following vehicles.
ここで、ある一つの発光ダイオード６に着目す
ると、前方に向かう直射光a1，a2は、前面レンズ
３を透過して光透過部１０より外部へ出光する。
この場合、前記直射光a1，a2は前面レンズ３に入
射する際、凸レンズ１１によつて屈折し、拡散す
る。一方、後方に向かう光の一部a3は、絶縁体５
または透明電極１３と絶縁体５を透過し、放熱板
７の表面で反射した後、その一部が上記直射光
a1，a2と同様、前面レンズ３を透過して光透過部
１０から外部に出光する。この反射光a3も凸レン
ズ１１によつて、屈折、拡散される。したがつ
て、発光ダイオード６から出る直射光および放射
板７によつて反射した反射光a1，a2，a3は、照明
に有効に利用されて、光の損失が少なく、しかも
凸レンズ１１によつて拡散されるので、光透過部
１０が大きくても、ダイオード自体の本来有して
いる発光出力の指向性に拘らず光透過部１０の全
面を略均一な明るさで照明することができる。 Here, when focusing on one light emitting diode 6, the direct light a 1 and a 2 directed forward passes through the front lens 3 and exits from the light transmitting section 10 to the outside.
In this case, when the direct light beams a 1 and a 2 enter the front lens 3, they are refracted by the convex lens 11 and diffused. On the other hand, part of the light a 3 going backwards is transmitted to the insulator 5
Or, after passing through the transparent electrode 13 and the insulator 5 and reflecting on the surface of the heat sink 7, a part of the above direct light
Similar to a 1 and a 2 , the light passes through the front lens 3 and exits from the light transmission section 10 to the outside. This reflected light a3 is also refracted and diffused by the convex lens 11. Therefore, the direct light emitted from the light emitting diode 6 and the reflected lights a 1 , a 2 , and a 3 reflected by the radiation plate 7 are effectively used for illumination, with little loss of light, and moreover, are transmitted to the convex lens 11 . Therefore, even if the light transmitting section 10 is large, the entire surface of the light transmitting section 10 can be illuminated with substantially uniform brightness regardless of the directivity of the light emitting output inherent to the diode itself. .
また、本発明においては、絶縁体５を介して伝
達される発光ダイオード６の熱を放熱板７によつ
て放熱するので、単にプリント基板に発光ダイオ
ードを実装したものに比べて放熱効果に優れ、さ
らに放熱板７の表裏面に凹凸部３０，３０Ａを設
け、放熱板７の表面積を大きくしているので一層
放熱効果を高め、しかも放熱板７とバツクカバー
２との間に適宜な隙間Ｇを設定しているので、こ
れら両者間の空気の流通を可能にし、放熱効果を
さらに高めることができる利点を有している。 Further, in the present invention, the heat of the light emitting diode 6 transmitted through the insulator 5 is radiated by the heat sink 7, so the heat radiation effect is superior to that of simply mounting the light emitting diode on a printed circuit board. Furthermore, uneven parts 30 and 30A are provided on the front and back surfaces of the heat sink 7 to increase the surface area of the heat sink 7, further enhancing the heat dissipation effect, and setting an appropriate gap G between the heat sink 7 and the back cover 2. Therefore, it has the advantage of allowing air to flow between the two and further enhancing the heat dissipation effect.
［発明の効果］
以上説明したように本発明に係る車輛用灯具
は、発光ダイオードが配設される透明な絶縁体上
に通電のための給電部を設け、この絶縁体の背面
に、表面全体が反斜面を形成し、また発光ダイオ
ードに対応する表面部分が凹部で裏面側が凸部を
形成する放熱板を設け、さらに放熱板とバツクカ
バーとの間に適宜な隙間を設けたので、光の有効
利用を図ることができ、照明効果を向上させるば
かりか、放熱効果も絶大で、温度上昇に伴う輝度
低下を防止し、安定した明るさを確保することが
でき、その効果は大である。[Effects of the Invention] As explained above, in the vehicle lamp according to the present invention, a power feeding part for supplying electricity is provided on a transparent insulator on which a light emitting diode is disposed, and the entire surface of the insulator is A heat dissipation plate is provided with a concave surface and a convex portion on the back surface corresponding to the light emitting diode, and an appropriate gap is provided between the heat dissipation plate and the back cover, so that the light can be effectively emitted. Not only does it improve the lighting effect, but it also has a great heat dissipation effect, prevents brightness from decreasing due to temperature rise, and ensures stable brightness, which is very effective.
第１図は本発明を自動車の尾灯に適用した場合
の一実施例を示す一部破断斜視図、第２図は要部
拡大断面図である。
１……尾灯、２……バツクカバー、３……前面
レンズ、４……灯室、５……絶縁体、６……発光
ダイオード、７……放熱板、１３……透明電極、
１４……導電箔、３０……凹部、３０Ａ……凸
部。
FIG. 1 is a partially cutaway perspective view showing an embodiment in which the present invention is applied to a tail light of an automobile, and FIG. 2 is an enlarged sectional view of the main part. 1... tail light, 2... back cover, 3... front lens, 4... light chamber, 5... insulator, 6... light emitting diode, 7... heat sink, 13... transparent electrode,
14... Conductive foil, 30... Concave portion, 30A... Convex portion.
Claims (1)
室内に多数の発光ダイオードを配設した車輛用灯
具において、前記発光ダイオードへ通電する給電
路を透明な絶縁体上に配設し、この絶縁体の背面
に放熱板を配置し、放熱板の表面を反射面に形成
すると共に、表面で前記発光ダイオードに対応す
る部分を、裏面側が凸となる凹部に形成し、且つ
前記放熱板とバツクカバーとの間に隙間を設けた
ことを特徴とする車輛用灯具。1. In a vehicle lamp in which a large number of light emitting diodes are arranged in a light chamber formed by a back cover and a front lens, a power supply path for supplying electricity to the light emitting diodes is arranged on a transparent insulator, and A heat dissipation plate is disposed on the back cover, the surface of the heat dissipation plate is formed into a reflective surface, and the portion of the front surface corresponding to the light emitting diode is formed into a concave portion with a convex side on the back side, and between the heat dissipation plate and the back cover. A vehicle lamp characterized by having a gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59236689A JPS61116701A (en) | 1984-11-12 | 1984-11-12 | Lamp apparatus for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59236689A JPS61116701A (en) | 1984-11-12 | 1984-11-12 | Lamp apparatus for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61116701A JPS61116701A (en) | 1986-06-04 |
| JPH0424801B2 true JPH0424801B2 (en) | 1992-04-28 |
Family
ID=17004310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59236689A Granted JPS61116701A (en) | 1984-11-12 | 1984-11-12 | Lamp apparatus for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61116701A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS634501A (en) * | 1986-06-25 | 1988-01-09 | 株式会社小糸製作所 | Lighting apparatus |
| JP2654650B2 (en) * | 1987-12-14 | 1997-09-17 | 三菱電線工業株式会社 | Aviation obstruction lights for power transmission towers |
| JP2602063B2 (en) * | 1988-06-10 | 1997-04-23 | 三菱電線工業株式会社 | Light-emitting diode lighting |
| JP7479192B2 (en) * | 2020-05-14 | 2024-05-08 | スタンレー電気株式会社 | Vehicle lighting fixtures |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55132083A (en) * | 1979-03-30 | 1980-10-14 | Sanyo Electric Co Ltd | Light emitting diode substrate |
| JPS5834301U (en) * | 1981-08-31 | 1983-03-05 | スタンレー電気株式会社 | Vehicle indicator light |
-
1984
- 1984-11-12 JP JP59236689A patent/JPS61116701A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61116701A (en) | 1986-06-04 |
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