WO1986002985A1 - Signal light unit having heat dissipating function - Google Patents
Signal light unit having heat dissipating function Download PDFInfo
- Publication number
- WO1986002985A1 WO1986002985A1 PCT/JP1984/000548 JP8400548W WO8602985A1 WO 1986002985 A1 WO1986002985 A1 WO 1986002985A1 JP 8400548 W JP8400548 W JP 8400548W WO 8602985 A1 WO8602985 A1 WO 8602985A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat
- light
- signal light
- radiator
- heat radiator
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/12—Visible signals
- B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
- B61L5/1809—Daylight signals
- B61L5/1854—Mounting and focussing of the light source in a lamp, fixing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/51—Cooling arrangements using condensation or evaporation of a fluid, e.g. heat pipes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/60—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air
- F21V29/67—Cooling arrangements characterised by the use of a forced flow of gas, e.g. air characterised by the arrangement of fans
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
- F21V29/74—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades
- F21V29/76—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section
- F21V29/763—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks with fins or blades with essentially identical parallel planar fins or blades, e.g. with comb-like cross-section the planes containing the fins or blades having the direction of the light emitting axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V31/00—Gas-tight or water-tight arrangements
- F21V31/04—Provision of filling media
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic lights
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0201—Thermal arrangements, e.g. for cooling, heating or preventing overheating
- H05K1/0203—Cooling of mounted components
- H05K1/0209—External configuration of printed circuit board adapted for heat dissipation, e.g. lay-out of conductors, coatings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L2207/00—Features of light signals
- B61L2207/02—Features of light signals using light-emitting diodes (LEDs)
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
- F21W2111/02—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00 for roads, paths or the like
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10106—Light emitting diode [LED]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S362/00—Illumination
- Y10S362/80—Light emitting diode
Definitions
- the heat quantity of a large power lead generated in the lamp body can be effectively radiated.
- the signal light unit in which a large number of light emitting diodes are arranged in a plane and used as a light source, the heat quantity of a large power lead generated in the lamp body can be effectively radiated.
- a signal lamp has been proposed in which a large number of light-emitting diodes are arranged in a plane on a substrate for the purpose of power saving, and this is used as a light source.
- light-emitting diodes are individually excellent in luminous efficiency and power saving, but the conversion efficiency from electricity to light is small, and most of the input power is heated, and many In this case, the calorific value becomes extremely large.
- the light emitting diode has a negative temperature characteristic in terms of the amount of light emitted, the light becomes darker as the ambient temperature increases, for example, the light emitting diode is turned on at an ambient temperature of 25.
- the luminosity of the diode is 1.0, if the ambient temperature is raised up to 80 ⁇ , the luminosity will be reduced to 12. Therefore, in order for the light emitting diode to emit light efficiently, it is necessary to suppress the temperature rise of the light emitting diode itself.
- a large number of light emitting diodes are arranged so as to have a light emission amount of a predetermined standard required as a light source of the signal light. If they are turned on at the same time, heat will be generated from the very large opening, which not only reduces the luminous efficiency but also reduces the light emitting diode. -There were drawbacks such as shortening the life of the door itself and causing a failure as a signal light unit.
- the present invention has solved such a problem.
- a heat radiator on the back side of a substrate on which a large number of light emitting diodes are arranged in a plane
- the signal light is generated in the lamp body. Effectively dissipates and dissipates the heat generated by the light emitting diode to the outside, thereby preventing the light emitting diode from being degraded by heat and causing adverse effects on the signal lights.
- the purpose is to provide a signal lamp unit having a heat dissipation function.
- a heat radiator is arranged on the back side of a substrate on which a large number of light emitting diodes serving as light sources of a signal lamp are arranged.
- This radiator guides and dissipates the heat generated by the light emitting diode generated inside the lamp body of the signal lamp to the outside of the lamp body.
- the heat radiator is formed as an aggregate of a large number of fins.
- good c have a structure of interposing the heat absorbers between the back of the
- FIG. 1 is a plan view and FIG.
- FIG. 3 is a schematic configuration diagram showing i.
- reference numeral 1 denotes a light emitting diode as a light source of a signal lamp
- reference numeral 2 denotes a plurality of light emitting diodes which are arranged and fixed in a plane and electrically connected to a wiring.
- the board 3 has a fin-shaped radiator 4 integrally formed on the back side. Attached to the front side of this board 3 is a printed board 2 having a large number of light emitting diodes 1 arranged and fixed with an insulating sheet 5 interposed therebetween, and fixed with a filling resin 6. After that, mount the lens 7 on the front side of the board 3.
- the heat of the light emitting diode 1 generated on the front side of the substrate 3 is conducted to the heat radiator 4 formed on the entire back side of the light emitting diode 1, and is effectively radiated from the entire surface thereof.
- the heat radiator 4 does not necessarily need to be integrally formed on the back surface of the substrate 3.
- the heat radiator 4, which is formed separately, may be a heat absorber such as a heat pipe described later. Connected to the back side of the substrate 3 using a blower such as a fan to enhance the heat radiation effect of the heat radiator 4.
- At least four parts of the heat sink be made of aluminum or other metal with good thermal conductivity.
- FIG. 5 shows an embodiment in a case where the signal light unit according to the present invention is used for a traffic signal light.
- the fixed signal light unit is fixed to the front of the light box 8 of the traffic light, and a hood 9 is attached to the upper outer surface of the light box.
- the heat radiator 4 allows the natural cooling to be performed in the interior of the housing 8.
- 3 ⁇ 4 By providing ventilation holes 10 on the outer surface of the light box 8 as shown in FIG. 1B, 1) the ventilation effect inside the light box 8 can be enhanced.
- C) and CD) are those in which a fan 11 or the like is used to blow the heat to the radiator 4 to enhance the heat dissipation effect.)),
- the heat radiator 4 is formed separately from the rear surface of the substrate 3, and the heat radiator 4 is exposed to the outside of the light box 8 or the outer surface of the light box 8.
- a heat absorbing body 12 such as a heat pipe
- the heat radiation effect can be enhanced.
- a traffic light having a plurality of signal light units, such as ( 3 ) it is also possible to collect heat using a common heat absorber 12], and CF).
- the signal light unit having a heat radiation function is a power-saving and small traffic signal light which can replace a conventional traffic signal light generally using an incandescent light bulb installed as a light source as a light source. Suitable for use as a container.
Description
T/JP84/00548 明 細 書
放熱機能を有する信号灯ュニ ッ ト ' 技術分野
この発明は、 多数の発光ダイ オー ドを平面的に配列 し、 これを光源と して用いた信号灯において、 灯体内に発生 する大力 口 リ ーの熱量を効果的に放熱させ得る よ う に し た信号灯ユニ ッ ト に関する。
背景技術
従来か ら、 省電力を 目'的 と して基板上に多数の発光ダ ィ オー ドを平面的に配列し、 これを光源 と して用い 信 号灯が提案されている。 しか し発光ダイ オー ドは、 個々 には発光効率に優れかつ省電力ではあるが、 電気か ら光 への変換効率が小さ く 、 入力電力の大部分が熱化して し ま い、 これが多数集合した場合の発熱量は極めて大き く な る。 しか も発光ダイ オー ドは、 発光量において負の温 度特性を有するため、 周囲温度が高 く る る とそれに応 じ て暗 く な 、 例えば周囲温度 25 の温度条件下で点灯さ せた発光ダイ ォ— ドの光度を 1. 0 と した場合、 周囲温度 を 80 Ό ま で上昇させる とその光度は 1 2 ま で低下して し ま う。 したがって発光ダイ オー ドを効率 よ く 発光させる ためには、 それ自体の温度上昇を低 く おさえる こ とが必 要である。 上記の よ う な多数の発光ダイ ォ— ドを用いた 信号灯においては、 信号灯の光源と して要求される所定 規格の発光量を有する程度に発光ダイ 才ー ドを多数配列 し.、 これを同時に点灯させる と極めて大力 口 リ ー の熱を 生じ、 発光効率を低下させるばか でな く 、 発光ダイ ォ
- ド自体の寿命を縮め、 信号灯ュニ ッ ト と しての故障の 原因と も な る と い う よ う な欠点があつた。
この発明は、 この よ う 問題を解決 した も のであ ]? 、 多数の発光ダイ 才ー ドを平面的に配列した基板の裏側に 放熱体を配置する こ と に よ 、 信号灯の灯体内に発生す る発光ダイ 才ー ドの発熱を効果的に外部へ導引放散させ、 熱に よ る発光ダイ 才 — ドの発光効率の低下や信号灯に対 する悪影響の発生を防止する こ とができ る放熱機能を有 する信号灯ュニ ッ ト を提供する こ と を 目 的と している。
発明の開示
即ち この発明は、 信号灯の光源 と る多数の発光ダイ ォー ドを配列する基板の裏側に放熱体を配置して成る。 この放熱体に よ 信号灯の灯体内に発生する発光ダイ ォ 一 ドの発熱を灯体外へ導引放散させる。 一般的に こ の放 熱体は、 多数のフ ィ ン の集合体と して形成されるが、 必 ず し も これを上記基板の裏側に直接一体的に付設する必 要はな く 、 基板の裏面との間に吸熱体を介在させる構造 であって も よい c
図面の簡単な説明
図面は、 この発明に係る放熱機能を有する信号灯ュ ニ ッ ト の実施態様を示すも のであ 、 第 1 図は平面図、 第
2 図は側面図、 第 3 図は第 1 図 n — m線断面図、 第 4 図 は同 じ く 第 1 図の部分拡大縦断面図 と部分拡大横断面図 第 5 図は この発明に係る放熱機能を有する信号灯ュ ニ ッ ト を交通信号灯器に用いた場合における各種の実施態様
i を示す概略構成図である。
発明を実施するための最良の形態
この発明を よ !) 詳細に説明するために、 以下添付図面 に従って これを説明する。
5 第 1 図乃至第 4 図に いて、 1 は信号灯の光源 と る 発光ダイ オー ド、 2 は多数の発光ダイ オー ド 1 を平面的 に配列固定する と共に、 電気的に配線接続する プ リ ン ト 板、 3 は裏側にフ ィ ン状の放熱体 4 を一体的に形成 して 成る基板である。 この基板 3 の表側に絶縁シ ー ト 5 を介 0 在させて多数の発光ダイ 才ー ド 1 を配列固定 して成る前 記プ リ ン ト 板 2 を取 D 付け、 充塡樹脂 6 で固定した後、 基板 3 の表側に レ ン ズ 7 を装着する。 基板 3 の表側で発 生する発光ダイ オー ド 1 の熱は、 この裏側全面に形成さ れた放熱体 4 に導引され、 その全表面か ら効果的に放散 i s される よ う になつている。 放熱体 4 は、 必ず し も基板 3 の裏面部に一体的に形成される必要はな く 、 別体に形成 された放熱体 4 を、 例えば後述する ヒ ー ト パイ プ等の吸 熱体を用いて基板 3 の裏面部に接続 し、 ま たフ ァ ン等の 送風機を併用 して放熱体 4 の放熱効果を高め る よ う に構
2 0 成する こ と も可能である。 またす く く と も放熱体 4 部 分については、 ア ル ミ その他の熱伝導性の よい金属で形 成される こ とが望ま しい。
第 5 図は、 こ の発明に係る信号灯ユニ ッ ト を交通信号 灯器に用いる場合における実施態様を示すも のであ j 、
2 5 (A)及び(B)は、 放熱体 4 が基板 3 の裏面部と一体的に形成
された信号灯ュニ ッ ト を交通信号灯器の灯箱 8 の前面に 固定 し、 その上部外側面部にフ ー ド 9 を取 U 付け、 灯箱
8 内において放熱体 4 に よ る 自然冷却を行わせる よ う に 構成 した も のである。 ¾ お (B)の よ う に灯箱 8 の外側面部 に通風孔 10を設ける こ と に よ 1) 灯箱 8 内の換気効果を高 める こ と も でき る。 (C)及び CD)は、 放熱体 4 に フ ァ ン等の 送風機 11を用いて送風 し、 その熱放散の効果を高めた も のであ ]) 、 (C)は、 送風機 11の風を直接放熱体 4 に当てる 方法に よ ]? 、 ま た(D)は、 灯箱 8 に通風孔 10を設け、 送風 機 11を用いて灯箱 8 内の対流を良 く する方法に よ 強制 冷却を行える よ う に構成した も である c これ等の方法 は、 発光ダイ オー ド 1 で構成される発光部の発熱量が大 きい場合や、 放熱体 4 が発光部に比較してい く 分小さ も のである場合に有効である。 ®及び(I)は、 放熱体 4 を 基板 3 の裏面部とは別体に形成 し、 これを灯箱 8 の外部 又は灯箱 8 の外側面部に露出させて配置 し、 基板 3 の裏 面部に対しては ヒ ー ト パィ プ等の吸熱体 12で接続した も のであ ]? 、 吸熱部と放熱部を距離的に分離する こ と に よ ) 断熱又は温度差を設定 し易 く し、 熱の放熱効果を高め る こ とができ る よ う になつている。 ま た ®の(3)の よ う に 複数の信号灯ユニ ッ ト を有する交通信号灯器においては 共通の吸熱体 12を用いて集熱させる こ と も 可能であ ]? 、 更に CF)の よ う に放熱体 4 を完全に灯箱 8 の外部に配置す る こ と に よ 灯箱 8 の小型化を図る こ と も 可能である。
産業上の利用可能性
以上の よ う に、 こ の発明に係る放熱機能を有する信号 灯ュニ ッ ト は、 従来一般に路側設置されている 白熱電球 を光源 と して用いる交通信号灯器に代わる省電力で小型 の交通信号灯器と して使用するのに適 している。
O PI IP
Claims
1. 表側に多数の発光ダィ ォー ドを配列して成る基板の 裏側に放熱体を配置 したこ と を特徴とする放熱機能を 有する信号灯ュニ ッ ト
2. 放熱体を フ ィ ン状に形成 したこ と を特徴 とする請求
の範囲第 1 項記青載の放熱機能を有する信号灯ユニ ッ ト
3. 放熱体を基板の裏面部と一体的に形成 したこ と を特 徵とする請求の範囲第 1 項又は第 2項記載の放熱機能 を有する信号灯ュニ ッ 卜
4. 灯箱の外部又は灯箱の外側面部に露出させて配置 し
た放熱体と基板の裏面部と を吸熱体で接続したこ と を 特徴とする 5 の範囲第 1 項又は第 2 項記載の放熱機 能を有する信号灯ュニ ッ ト
5. 灯箱内に 'フ ァン等の送風機を配置 した こ と を特徴と する請求の範囲第 '1 項又は第 2 項記載の放熱機能を有 する信号灯ュニ ッ ト
ΟΜΡΙ
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT84904170T ATE47624T1 (de) | 1984-11-15 | 1984-11-15 | Signallichteinheit mit waermeabfuhr. |
US06/908,702 US4729076A (en) | 1984-11-15 | 1984-11-15 | Signal light unit having heat dissipating function |
PCT/JP1984/000548 WO1986002985A1 (en) | 1984-11-15 | 1984-11-15 | Signal light unit having heat dissipating function |
DE8484904170T DE3480294D1 (en) | 1984-11-15 | 1984-11-15 | Signal light unit having heat dissipating function |
EP84904170A EP0202335B1 (en) | 1984-11-15 | 1984-11-15 | Signal light unit having heat dissipating function |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP1984/000548 WO1986002985A1 (en) | 1984-11-15 | 1984-11-15 | Signal light unit having heat dissipating function |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1986002985A1 true WO1986002985A1 (en) | 1986-05-22 |
Family
ID=13818463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1984/000548 WO1986002985A1 (en) | 1984-11-15 | 1984-11-15 | Signal light unit having heat dissipating function |
Country Status (5)
Country | Link |
---|---|
US (1) | US4729076A (ja) |
EP (1) | EP0202335B1 (ja) |
AT (1) | ATE47624T1 (ja) |
DE (1) | DE3480294D1 (ja) |
WO (1) | WO1986002985A1 (ja) |
Families Citing this family (300)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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Also Published As
Publication number | Publication date |
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EP0202335A1 (en) | 1986-11-26 |
ATE47624T1 (de) | 1989-11-15 |
EP0202335A4 (en) | 1987-03-03 |
US4729076A (en) | 1988-03-01 |
DE3480294D1 (en) | 1989-11-30 |
EP0202335B1 (en) | 1989-10-25 |
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