JPH11238410A - Discharge lamp lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge lamp lighting device selectively usable as a low-cost or small-sized lighting device by constituting a second case so as to have a thick cross section and a small length, compared with a first case, with respect to a case for housing a printed board for mounting electronic parts commonly used in a specified ratio of two types of lighting circuits used for a common discharge lamp and having substantially the same lighting system. SOLUTION: Narrow-section and thick-section printed board housing cases corresponding to two-lamp parallel tools for T5 type and T8 type discharge lamps are set so as to have widths of 43.2 mm and 49.2 mm, heights of 25.4 mm and 40 mm, lengths of 400 mm and 350 mm, respectively. A switching element or auxiliary circuit for separating two resistors of the switching operation control circuit of the lighting circuit housed by the thick section case requiring no consideration to heating can be omitted. A leakage transformer is used commonly for the output transformer and resonance inductance of an inverter circuit to reduce the number of part items. By the use of discharge lamps of the same circuit method and the same rated, 50% or more of used parts can be commonly used.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は放電灯点灯装置に関
する。The present invention relates to a discharge lamp lighting device.

【０００２】[0002]

【従来の技術】通常、放電灯点灯装置の寸法はそれを収
める器具形状と、入力電源、負荷、回路方式などの仕様
及び部品温度の規定値から制約を受ける。従来の放電灯
点灯装置は一つの入力電源、負荷、回路方式が決められ
ると、装置の寸法としては一種類の形状のみ製品として
開発されてきた。2. Description of the Related Art In general, the dimensions of a discharge lamp lighting device are restricted by the shape of a fixture for accommodating the device, the specifications of an input power source, a load, a circuit system, and the like, and the specified values of component temperatures. In a conventional discharge lamp lighting device, when one input power source, load, and circuit system are determined, only one type of shape of the device has been developed as a product.

【０００３】図４，図５は本発明に係わる従来例の放電
灯点灯装置の点灯回路を実装したプリン基板を収納する
プリント基板収納ケース１の外観と、点灯回路の回路図
を示す。図４で示されるプリント基板収納ケース１（以
下ケース１と言う）は所謂細断面タイプの形状であり、
例えば全長が４００ｍｍ、全幅が４３．２ｍｍ、高さが
２５．４ｍｍというような寸法に設定されている。FIGS. 4 and 5 show the appearance of a printed circuit board storage case 1 for housing a pudding substrate on which a lighting circuit of a conventional discharge lamp lighting device according to the present invention is mounted, and a circuit diagram of the lighting circuit. The printed circuit board storage case 1 (hereinafter referred to as case 1) shown in FIG.
For example, the dimensions are set such that the overall length is 400 mm, the overall width is 43.2 mm, and the height is 25.4 mm.

【０００４】このケース１を収めるための照明器具を小
さくすることが可能となるが、細断面タイプのケース１
を用いる場合は収納されたプリント基板に実装している
電子部品の温度の規定値を満足させために次のような配
慮が為されている。つまり図５の点灯回路は、波形歪の
改善等に降圧チョッパを用いるともに、該降圧チョッパ
のスイッチング素子を共有する形で構成されるハーフブ
リッジ型のインバータ回路１００を用いたものである。
この回路ではインバータ回路１００を制御する制御回路
１０１の起動時の直流電源Ｖｃｃを得るために設けた分
圧抵抗Ｒ1,Ｒ２が定常点灯時に発熱して、その熱の影響
を回路部品が受けるのを防ぐためにスイッチング素子Ｑ
４とその補助回路を用いて抵抗Ｒ１，Ｒ２を点灯時に切
り離すようにしている。つまりケース１が細断面である
ためケース１内の雰囲気温度が上記抵抗Ｒ１，Ｒ２の発
熱により上昇することに対する配慮を施している。同様
な理由で、またチョーク類の発熱を抑えるために共振イ
ンダクタンス（トランスＴ２の１次巻線）と、出力用の
絶縁トランスＴ３を使用するためコストアップとなって
いる。さらに細断面タイプではインバータ回路１００の
スイッチング素子Ｑｌ、Ｑ２及び大きな電流が流れるダ
イオードＤ５，Ｄ６の放熱対策が必要であり、放熱板や
ネジなどの機構部品によりコストアップとなる。Although it is possible to reduce the size of the luminaire for accommodating the case 1, the case 1 having a small cross section is used.
The following considerations are made to satisfy the specified value of the temperature of the electronic component mounted on the housed printed circuit board. That is, the lighting circuit of FIG. 5 uses a step-down chopper for improving waveform distortion and the like, and uses a half-bridge type inverter circuit 100 configured to share a switching element of the step-down chopper.
In this circuit, the voltage dividing resistors R1 and R2 provided for obtaining the DC power supply Vcc at the time of starting the control circuit 101 for controlling the inverter circuit 100 generate heat during steady lighting, and the circuit components are affected by the heat. Switching element Q to prevent
4 and its auxiliary circuit, the resistors R1 and R2 are disconnected at the time of lighting. That is, since the case 1 has a narrow cross section, consideration is given to the fact that the ambient temperature in the case 1 rises due to the heat generated by the resistors R1 and R2. For the same reason, the use of a resonant inductance (primary winding of the transformer T2) and an insulating transformer T3 for output in order to suppress heat generation of the chokes increase the cost. Further, in the thin section type, it is necessary to take measures against heat radiation of the switching elements Q1, Q2 of the inverter circuit 100 and the diodes D5, D6 through which a large current flows, and the cost is increased by mechanical parts such as a heat radiation plate and screws.

【０００５】その一方でケース１の高さを低くすること
で放電灯点灯装置を収納する照明器具の高さを低減し、
また幅を細くすることで照明器具の設置面積も縮小可能
となるため、デザイン重視の器具に収納することが可能
となる。とくにＴ５型（管径が５／８インチ）の放電灯
を用いる場合には放電灯に見合った細幅の器具を用いら
が、しかしながら図５のように例えばＴ５型の約４５Ｗ
の２灯の放電灯ＬＡを点灯させる点灯回路を用いる器具
では放電灯ＬＡを並行装着した場合の幅寸法に対応し
て、当該点灯回路の電子部品を実装したプリント基板を
収納するケース１の寸法は図４に示すような寸法に設定
される。On the other hand, by reducing the height of the case 1, the height of the lighting equipment accommodating the discharge lamp lighting device is reduced,
In addition, since the installation area of the lighting fixture can be reduced by reducing the width, the lighting fixture can be stored in a design-oriented fixture. In particular, when a T5 type (5/8 inch tube diameter) discharge lamp is used, a narrow apparatus suitable for the discharge lamp is used. However, as shown in FIG.
In a device using a lighting circuit for lighting the two discharge lamps LA, the size of the case 1 for accommodating the printed circuit board on which the electronic components of the lighting circuit are mounted, corresponding to the width when the discharge lamps LA are mounted in parallel. Are set to dimensions as shown in FIG.

【０００６】[0006]

【発明が解決しようとする課題】しかし現実問題とし
て、近年益々、長寿命化、デザイン、省スペースなどの
寸法の小型化と、低コスト化の３つの要望があり、長寿
命を満足させるためには小型化、低コスト化の両者はト
レードオフの関係となる。本発明は、上記問題点に鑑み
てなされたもので、その目的とするところは略同じ方式
の点灯回路で共通の放電灯に対応する低コストの放電灯
点灯装置と、小型の放電灯点灯装置の何れかに適したプ
リント基板収納ケースを選択してどちらの放電灯点灯装
置をも現することができる放電灯点灯装置を提供するこ
とである。However, as a practical problem, there are three demands in recent years: longer life, smaller size such as design and space saving, and lower cost. There is a trade-off between miniaturization and cost reduction. The present invention has been made in view of the above-described problems, and has as its object to provide a low-cost discharge lamp lighting device corresponding to a common discharge lamp with a lighting circuit of substantially the same system, and a small discharge lamp lighting device. It is an object of the present invention to provide a discharge lamp lighting device capable of realizing both discharge lamp lighting devices by selecting a printed circuit board storage case suitable for any of the above.

【０００７】[0007]

【課題を解決するための手段】上記問題点を解決するた
めに、請求項ｌ記載の発明では、放電灯に電力を供給す
るための点灯回路の電子部品が実装されるプリント基板
を収納する第１のプリント基板収納ケースに対して、太
い断面を有し、放電灯に電力を供給するための点灯回路
の電子部品が実装されるプリント基板を収納する第２の
プリント基板収納ケースとの２タイプのプリント基板収
納ケースが準備され、該第２のプリント基板収納ケース
に収納される第２のプリント基板に実装される点灯回路
の入力電源電圧及び電力が供給される放電灯の種類を第
１のプリント基板収納ケースに収納される第１のプリン
ト基板に実装される点灯回路の入力電源電圧及び電力が
供給される放電灯の種類を共通とし、夫々の点灯回路の
点灯方式が略同一で、両プリント基板に実装される電子
部品の約５０％以上を互いに共通とし、第２のプリント
基板収納ケースの断面の幅、高さの寸法を、第１のプリ
ント基板収納ケースの幅、高さの寸法に比べて小さく
し、第２のプリント基板収納ケースの断面の長さ寸法を
第１のプリント基板収納ケースの断面の長さ寸法よりも
小さくし、使用器具に応じてこれらプリント基板収納ケ
ースを選択使用する特徴とする。In order to solve the above-mentioned problems, according to the present invention, a printed circuit board on which electronic components of a lighting circuit for supplying electric power to a discharge lamp are mounted is housed. One printed circuit board storage case has a thicker cross section and a second printed circuit board storage case for storing a printed circuit board on which electronic components of a lighting circuit for supplying power to a discharge lamp are mounted. The printed circuit board storage case is prepared, and the input power supply voltage of the lighting circuit mounted on the second printed circuit board stored in the second printed circuit board storage case and the type of the discharge lamp to which the power is supplied are set to the first. The input power supply voltage of the lighting circuit mounted on the first printed circuit board accommodated in the printed circuit board storage case and the type of discharge lamp supplied with power are common, and the lighting method of each lighting circuit is substantially the same. Approximately 50% or more of the electronic components mounted on both printed circuit boards are common to each other, and the width and height dimensions of the cross section of the second printed circuit board storage case are adjusted to the width and height of the first printed circuit board storage case. And the length of the cross section of the second printed circuit board storage case is smaller than the length of the cross section of the first printed circuit board storage case. Is a feature to be selectively used.

【０００８】請求項２の発明では、請求項１の発明にお
いて、点灯回路を、交流電源を整流して直流を得る整流
回路を含む電源入力部と、該電源入力部から直流を高周
波に変換するインバータ回路と、該インバータ回路の高
周波電力を放電灯へ供給するトランスやインダクタンス
等の磁性部品から構成される出力部とで構成し、第２の
プリント基板収納ケースに収納される第２のプリント基
板の一端部表面を上記整流回路の電子部品を実装する第
１の領域とし、他端部表面を出力部の磁性部品を実装す
る第２の領域とし、これら両端部の間の中間部のプリン
ト基板表面をインバータ回路のスイッチング素子等の発
熱部品を実装する第３の領域として成ることを特徴とす
る。According to a second aspect of the present invention, in the first aspect of the invention, the lighting circuit includes a power supply input section including a rectifier circuit for rectifying an AC power supply to obtain a direct current, and converts the direct current to a high frequency from the power supply input section. A second printed circuit board, which is composed of an inverter circuit and an output unit formed of a magnetic component such as a transformer or an inductance for supplying high-frequency power of the inverter circuit to the discharge lamp and housed in a second printed circuit board storage case The surface of one end of the printed circuit board is a first area for mounting the electronic component of the rectifier circuit, the other end surface is a second area for mounting the magnetic component of the output section, and a printed circuit board in an intermediate portion between the both ends. The surface is formed as a third region for mounting a heat-generating component such as a switching element of an inverter circuit.

【０００９】請求項３の発明では、請求項２の発明にお
いて、上記第１の領域と第３の領域との間間及び第３の
領域と第２の領域との間のプリント基板の表面に夫々、
電源入力部やインバータ回路に用いられるコンデンサ等
の低発熱部品を実装するとともに第２のプリント基板の
短手の幅寸法の５０％以上の空間を確保した第１、第２
の低発熱領域を夫々設け、上記発熱部品にパッケージタ
イプの部品を用い、該発熱部品を第２のプリント基板収
納ケース内に第２のプリント基板を収納した時に第２の
プリント基板収納ケースの内面に接触するように第３の
領域の片側に直立配置して成ることを特徴とする。According to a third aspect of the present invention, in the second aspect of the present invention, the surface of the printed circuit board between the first region and the third region and between the third region and the second region is provided. Respectively,
A first and a second mounting a low heat-generating component such as a capacitor used for a power input unit and an inverter circuit and securing a space of 50% or more of the width of the short side of the second printed circuit board.
The low heat generation area is provided respectively, and a package type component is used as the heat generation component. When the heat generation component is stored in the second printed circuit board storage case, the inner surface of the second printed circuit board storage case is formed. The third region is arranged upright on one side of the third region so as to come into contact with the third region.

【００１０】請求項４の発明では、請求項３の発明にお
いて、第３の領域の裏面及び第１、第２の低域発熱領域
の少なくとも一方の裏面で且つ上記発熱部品の配置位置
とは反対側に点灯回路に使用する表面実装型の電子部品
を実装して成ることを特徴とする。請求項５の発明で
は、請求項２乃至４の何れかに記載の発明において、交
流電源を接続する入力端子を電源入力部側に設け、放電
灯を接続する出力端子を出力部側に設けて成ることを特
徴とする。According to a fourth aspect of the present invention, in the third aspect of the present invention, the back surface of the third region and the back surface of at least one of the first and second low-frequency heat generating regions are opposite to the positions of the heat generating components. A surface-mounted electronic component used for the lighting circuit is mounted on the side. According to a fifth aspect of the present invention, in the invention according to any one of the second to fourth aspects, an input terminal for connecting an AC power source is provided on a power input portion side, and an output terminal for connecting a discharge lamp is provided on an output portion side. It is characterized by comprising.

【００１１】請求項６の発明では、請求項３の発明にお
いて、第１の低発熱領域に実装される電子部品にはイン
バータ回路の電源となるアルミ電解コンデンサからなる
平滑用コンデンサを含み、第２の低発熱領域に実装され
る部品にはインバータ回路の制御回路に用いるコンデン
サを含み、第２の低発熱領域の平均温度が第１の低発熱
領域の平均温度より低くなるように、第３の領域に実装
される発熱部品を配置して成ることを特徴とする。According to a sixth aspect of the present invention, in the third aspect of the invention, the electronic components mounted in the first low heat generation region include a smoothing capacitor made of an aluminum electrolytic capacitor serving as a power supply of an inverter circuit, and The components mounted in the low heat generation area include a capacitor used for a control circuit of the inverter circuit, and the third heat generation area is configured so that the average temperature of the second low heat generation area is lower than the average temperature of the first low heat generation area. A heat-generating component to be mounted in the area is arranged.

【００１２】[0012]

【発明の実施の形態】以下本発明を実施形態により説明
する。本発明は上記の細断面のケース１を第１のケース
とし、この第１のケースと次に説明する太断面のプリン
ト基板収納ケース２（以下ケース２と言う）を、使用器
具に対応させるように選択使用とする点に特徴を有し、
前者ではＴ５型の放電灯を２灯並行装着する器具、後者
ではＴ８型（管径が２４．５ｍｍ）の放電灯を２灯並行
装着する器具に対応する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments. In the present invention, the above-described case 1 having a small cross section is used as a first case, and the first case and a printed circuit board storage case 2 having a large section described below (hereinafter, referred to as case 2) are made to correspond to a tool to be used. It has a feature in that it is used selectively.
The former corresponds to a device in which two T5 type discharge lamps are mounted in parallel, and the latter corresponds to a device in which two T8 type (tube diameter: 24.5 mm) discharge lamps are mounted in parallel.

【００１３】さて図１に示す実施形態のケース２は幅が
４９．２ｍｍ、高さが４０ｍｍ、長さが３５０ｍに設定
され、２灯並行装着するＴ８型（管径が２４．５ｍｍ）
の放電灯用器具に対応している。このケース２に収納さ
れるプリント基板２０に実装される点灯回路は図２に示
すような構成となっている。 尚点灯回路の動作自体は
本発明の要旨でないため、詳細な説明は省略するが、以
下大略的な説明を行なう。The case 2 of the embodiment shown in FIG. 1 has a width of 49.2 mm, a height of 40 mm, and a length of 350 m, and is a T8 type (tube diameter of 24.5 mm) which is mounted in parallel with two lamps.
Corresponding to the discharge lamp fixtures. The lighting circuit mounted on the printed circuit board 20 housed in the case 2 has a configuration as shown in FIG. Since the operation of the lighting circuit itself is not the gist of the present invention, a detailed description is omitted, but a brief description will be given below.

【００１４】まず図２に示す回路は基本的には図５の点
灯回路と同様に降圧チョッパを用いて波形改善を図った
もので、ハーフブリッジ型のインバータ回路１００のＦ
ＥＴからなるスイッチング素子Ｑ１，Ｑ２の一方Ｑ２は
降圧チョッパのスイッチング素子として共用される。そ
して電源入力部１０２は入力端子１０３，１０３間に接
続される交流電源をフィルタ回路１０４とチョークＬ１
と整流回路１０５と、アルミ電解コンデンサからなる平
滑コンデンサＣ１４や、上記降圧チョッパ等から構成さ
れ、インバータ回路１００は平滑コンデンサＣ１４や降
圧チョッパを含む電源入力部１０２から与えられる直流
電力をスイッチング素子Ｑ１，Ｑ２のスイッチング動作
と共振回路等の働きにより高周波電力に変換し、この高
周波電力をリーケージトランスからなる出力トランスＴ
２を介して放電灯ＬＡ，ＬＡに供給して並列点灯させる
ようになっている。そしてインバータ回路１００のスイ
ッチング動作を制御するのが制御回路１０１であり、起
動時には抵抗Ｒ１，Ｒ２、定電圧ダイオードＺＤ１，Ｚ
Ｄ２やコンデンサＣ１７等の電源回路より電源供給を受
け、動作開始後はトランスＴ２の２次出力により動作電
源を得て制御用集積回路ＩＣ１，ＩＣ２を含む回路が動
作してスイッチング素子Ｑ１，Ｑ２のスイッチングを制
御するようになっている。First, the circuit shown in FIG. 2 basically improves the waveform by using a step-down chopper as in the lighting circuit of FIG.
One of the switching elements Q1 and Q2 made of ET is shared as a switching element of a step-down chopper. The power supply input unit 102 connects the AC power supply connected between the input terminals 103 and 103 to the filter circuit 104 and the choke L1.
And a rectifier circuit 105, a smoothing capacitor C14 made of an aluminum electrolytic capacitor, the above-described step-down chopper, and the like. The inverter circuit 100 converts the DC power supplied from the power input unit 102 including the smoothing capacitor C14 and the step-down chopper into the switching elements Q1, The switching operation of Q2 and the operation of the resonance circuit convert the high-frequency power into high-frequency power, and the high-frequency power is converted into an output transformer T including a leakage transformer.
The discharge lamps LA, LA are supplied to the discharge lamps 2 through 2 for parallel lighting. The control circuit 101 controls the switching operation of the inverter circuit 100. At startup, the resistors R1 and R2 and the constant voltage diodes ZD1 and ZD
Power is supplied from a power supply circuit such as D2 and a capacitor C17. After the operation is started, the operation power is obtained by the secondary output of the transformer T2, and the circuit including the control integrated circuits IC1 and IC2 operates to operate the switching elements Q1 and Q2. Switching is controlled.

【００１５】そして図５の回路と相違するのは、太断面
のケース２に実装したプリント基板２０を収納するもの
であるから、抵抗Ｒ１，Ｒ２の点灯時の発熱を配慮する
必要がないため、抵抗Ｒ１，Ｒ２を切り離すためのスイ
ッチング素子や補助回路を無くし、また共振回路では、
出力トランスＴ２にリーケージトランスを用いて共振用
インダクタとして兼用することにより、部品点数を減ら
している。The difference from the circuit of FIG. 5 resides in that the printed circuit board 20 mounted in the case 2 having a large cross section is housed, and there is no need to consider heat generation during lighting of the resistors R1 and R2. A switching element and an auxiliary circuit for disconnecting the resistors R1 and R2 are eliminated.
By using a leakage transformer as the output transformer T2 and also serving as a resonance inductor, the number of components is reduced.

【００１６】上記のように部品点数を削減していること
によりコストの低減を図り、またインバータ回路１００
を含む回路方式を図５の回路方式と同じ方式とし、また
負荷である放電灯ＬＡを同一定格のものを使用すること
により、その他の使用部品を少なくとも５０％以上共通
としている。つまり交流電源電圧が１００Ｖであり、負
荷は２本の高周波点灯用蛍光灯からなる放電灯ＬＡ，Ｌ
Ａの一本あたりの消費電力を約４５Ｗとしている。By reducing the number of parts as described above, cost can be reduced.
5 is the same as the circuit system of FIG. 5, and the discharge lamp LA as the load is of the same rating, so that the other components are at least 50% or more in common. That is, the AC power supply voltage is 100 V, and the load is the discharge lamps LA and L composed of two high-frequency lighting fluorescent lamps.
The power consumption per A is about 45 W.

【００１７】而して図１のケース２は幅寸法が大きく取
れる分、収納するプリント基板２０の幅を大きくするこ
とが可能で、実装面積をケース１に収納されるプリント
基板と略同じとすることにより、長さ方向の寸法をケー
ス１に比べて短くしている。而して本実施形態における
ケース２０は容積の拡大によって内部の雰囲気温度が低
くなり、その分プリント基板２０に実装した部品の温度
を低下させることができる。従って上述のように制御回
路１０１の起動時の直流電源Ｖｃｃを得るために設けた
分圧抵抗Ｒ1,Ｒ２を点灯時に切り離す必要がなく、その
ため切り離すためのスイッチング素子や補助回路が不要
となる。また断面積が大きくなった分、出力トランスＴ
２のコア、ボビン形状を大きくすることができ、そのた
めリーケージトランスで出力トランスと共振インダクタ
ンスとを兼用する構成をとることができる。In the case 2 shown in FIG. 1, the width of the printed circuit board 20 to be stored can be increased by the large width, and the mounting area is substantially the same as the printed circuit board stored in the case 1. Thereby, the dimension in the length direction is shorter than that of the case 1. Thus, the internal temperature of the case 20 according to the present embodiment is reduced due to the increase in the volume, and the temperature of the components mounted on the printed circuit board 20 can be reduced accordingly. Therefore, as described above, it is not necessary to disconnect the voltage dividing resistors R1 and R2 provided for obtaining the DC power supply Vcc when the control circuit 101 is started up at the time of lighting, so that a switching element and an auxiliary circuit for disconnecting the voltage dividing resistors are unnecessary. In addition, the output transformer T
2 and the bobbin shape can be enlarged, so that the leakage transformer can be configured to also serve as the output transformer and the resonance inductance.

【００１８】従って本実施形態は、寿命部品の定格低
減、回路、放熱機構部品の簡略化による低コスト化が可
能となり、低コスト化の商品の提供を行なう場合に最適
となる。ところで、プリント基板２０上で部品実装の配
置位置を配慮することにより、発熱による熱的影響を少
なくするようにして、プリント基板２０を収納するケー
ス２の断面をできる限り小さくすることが可能となる。Therefore, the present embodiment can reduce the cost by reducing the rating of the life component and simplifying the circuit and the radiating mechanism component, and is most suitable for providing a low cost product. By taking into account the arrangement position of component mounting on the printed circuit board 20, it is possible to reduce the thermal effect of heat generation, and to make the cross section of the case 2 accommodating the printed circuit board 20 as small as possible. .

【００１９】つまり、図３（ａ）に示すように本実施形
態のケース２に収納されるプリント基板２０の表面の一
端部を交流電源を接続するコネクタからなる入力端子１
０３を含む電源入力部１０２の主なる電子部品を実装す
る第１の領域Ｉとし、他端部を放電灯ＬＡ．ＬＡを接続
するコネクタからなる出力端子１０５や予熱回路用コン
デンサＣ７，Ｃ８，Ｃ９，Ｃ１１や出力トランスＴ２等
からなる出力部１０６の電子部品を実装する領域IIと
し、中央部をインバータ回路１００の発熱部品であるス
イッチング素子Ｑ１，Ｑ２やダイオードＤ５，Ｄ６を実
装する領域III としてある。That is, as shown in FIG. 3A, one end of the surface of the printed circuit board 20 housed in the case 2 of this embodiment is connected to an input terminal 1 comprising a connector for connecting an AC power supply.
03, which is a first area I for mounting main electronic components of the power input section 102 including the discharge lamp LA. The output terminal 105 comprising a connector for connecting the LA, the preheating circuit capacitors C7, C8, C9, C11, and the output part 106 comprising the output transformer T2 are provided as a region II for mounting electronic components. This is a region III where the switching elements Q1 and Q2 and the diodes D5 and D6, which are components, are mounted.

【００２０】また領域Ｉと領域IIの間には発熱の低い平
滑用コンデンサＣ１４を実装し且つプリント基板２０の
幅寸法の５０％以上の空間を確保した第１の低発熱領域
Ａ１を設け、領域IIと領域III の間には発熱の低い制御
回路１０１のアルミ電解コンデンサ或いはフィルムコン
デンサからなるコンデンサＣ２０を実装し且つプリント
基板２０の幅寸法の５０％以上の空間を確保した第２の
低発熱領域Ａ２を設けている。A first low heat generation area A1 is provided between the area I and the area II, on which a smoothing capacitor C14 having low heat generation is mounted and a space of 50% or more of the width of the printed circuit board 20 is secured. A second low heat generating area in which a capacitor C20 made of an aluminum electrolytic capacitor or a film capacitor of the control circuit 101 having low heat generation is mounted between the area II and the area III and a space of 50% or more of the width of the printed circuit board 20 is secured. A2 is provided.

【００２１】そしてスイッチング素子のＱｌ、Ｑ２と、
ダイオードＤ５，Ｄ６にＴ０−２２０のパッケージタイ
プのものを使用し、ケース２内にプリント基板２０を収
納した時にケース２の内面に接触させてケース２への放
熱が図れるように領域III のプリント基板２０の片側に
直立実装してある。またこの場合スイッチング素子Ｑ
１，Ｑ２を第１の低発熱領域Ａ１側に、ダイオードＤ
５，Ｄ６を第２の低発熱領域Ａ２側に配置して、両領域
Ａ１，Ａ２の実装部品の平均温度を第１の低発熱領域Ａ
１が第２の低発熱領域Ａ２側に比べて高くなるようにし
てある。ここでスイッチング素子Ｑ１の温度ＴＱ１はス
イッチング素子Ｑ２の温度ＴＱ２よりも低く、ダイオー
ドＤ５の温度ＴＤ５はダイオードＤ６の温度ＴＤ６より
も高くなるため、図示するようにスイッチング素子Ｑ１
と、ダイオードＤ５を内側に配置することにより、両発
熱領域Ａ１，Ａ２に実装されるコンデンサＣ１４，Ｃ２
０の使用温度に適するように温度勾配を設定している。And Q1 and Q2 of the switching element;
A diode type D5, D6 package type T0-220 is used, and when the printed circuit board 20 is housed in the case 2, it is brought into contact with the inner surface of the case 2 so that heat can be radiated to the case 2. 20 is mounted upright on one side. In this case, the switching element Q
1 and Q2 to the first low heat generation area A1 side,
5, D6 are arranged on the second low heat generation area A2 side, and the average temperature of the mounted components in both areas A1 and A2 is reduced to the first low heat generation area A2.
1 is higher than the second low heat generation area A2 side. Here, the temperature TQ1 of the switching element Q1 is lower than the temperature TQ2 of the switching element Q2, and the temperature TD5 of the diode D5 is higher than the temperature TD6 of the diode D6.
And the diodes C5 and C4 mounted on both heat generating areas A1 and A2 by disposing the diode D5 inside.
The temperature gradient is set so as to be suitable for the use temperature of 0.

【００２２】以上のように構成することにより低発熱領
域Ａ１，Ａ２に実装されるアルミ電解コンデンサや制御
用フィルムコンデンサの使用温度が満足される。また、
前記スイッチング素子Ｑ１，Ｑ２及びダイオードＤ５，
Ｄ６を直立させて並べ、ケース２０側面に放熱すること
によりスイッチング素子Ｑ１，Ｑ２及びダイオードＤ
５，Ｄ６の熱を効果的に放熱し、ケース２０内の雰囲気
温度を低下させることができる。また発熱部品の集中配
置と、ケース２０への接触による放熱のためケース２０
の放熱部分の曲げ金型や放熱用機構部品が不要となり、
コスト低減が図れる。With the above configuration, the working temperature of the aluminum electrolytic capacitor and the control film capacitor mounted in the low heat generation areas A1 and A2 is satisfied. Also,
The switching elements Q1, Q2 and the diode D5
D6 are arranged upright, and heat is radiated to the side surface of the case 20, so that the switching elements Q1, Q2 and the diode D
5, the heat of D6 can be effectively radiated, and the ambient temperature in the case 20 can be reduced. In addition, the case 20 is used for the centralized arrangement of the heat-generating components and the heat radiation due to the contact with the case 20.
No need for a bending mold or heat dissipation mechanism parts for the heat dissipation part.
Cost reduction can be achieved.

【００２３】またプリント基板２０の裏面では、図３
（ｂ）に示すように上記領域III 及び低発熱領域Ａ１に
裏面には表面実装の集積回路ＩＣ１，ＩＣ２やチップ抵
抗、チップセラミックコンデンサ等の電子部品をを配置
することで部品温度特性の影響を最小に抑えている。更
に電源入力部１０２と、出力部１０６を上記のようにプ
リント基板２０の両端部に実装しているため細長なプリ
ント基板２０上で均等な温度分布を実現する。On the back surface of the printed circuit board 20, FIG.
As shown in (b), the influence of the component temperature characteristics can be reduced by disposing electronic components such as surface-mounted integrated circuits IC1, IC2, chip resistors, and chip ceramic capacitors on the back surface in the region III and the low heat generation region A1. Minimized. Further, since the power input unit 102 and the output unit 106 are mounted on both ends of the printed circuit board 20 as described above, a uniform temperature distribution is realized on the elongated printed circuit board 20.

【００２４】ところで図２の回路図における電子部品
と、同じ図３における実装せる電子部品には同じ記号、
番号を付して対応関係を示し、また図５の回路における
電子部品と同じもの、同じ役割のものにも同じ記号、番
号を付して両者の対応関係を示している。尚ケース１の
幅を４５ｍｍ未満とし、高さを２６ｍｍ未満とし、長さ
を３６０ｍｍより長くし、ケース２の幅を４５ｍｍより
大きくし、高さを２６ｍｍ未満とし、長さを３６０ｍｍ
未満とすれば、Ｔ５型のような細い管径の放電灯に対応
する器具や、Ｔ８型のような太い管径の放電灯に対応す
る器具に用いることができるケースが得られる。図１や
図４の寸法に特に限定されるものではない。The electronic component in the circuit diagram of FIG. 2 and the electronic component to be mounted in FIG.
The numbers indicate the corresponding relationship, and the same components and the same role as the electronic components in the circuit of FIG. 5 are denoted by the same symbols and numbers to indicate the corresponding relationship. The width of case 1 is less than 45 mm, the height is less than 26 mm, the length is greater than 360 mm, the width of case 2 is greater than 45 mm, the height is less than 26 mm, and the length is 360 mm
If it is less than this, a case can be obtained which can be used for an appliance corresponding to a discharge lamp having a small tube diameter such as a T5 type or an appliance corresponding to a discharge lamp having a large tube diameter such as a T8 type. The dimensions are not particularly limited to those shown in FIGS.

【００２５】[0025]

【発明の効果】請求項ｌ記載の発明は、放電灯に電力を
供給するための点灯回路の電子部品が実装されるプリン
ト基板を収納する第１のプリント基板収納ケースに対し
て、太い断面を有し、放電灯に電力を供給するための点
灯回路の電子部品が実装されるプリント基板を収納する
第２のプリント基板収納ケースとの２タイプのプリント
基板収納ケースが準備され、該第２のプリント基板収納
ケースに収納される第２のプリント基板に実装される点
灯回路の入力電源電圧及び電力が供給される放電灯の種
類を第１のプリント基板収納ケースに収納される第１の
プリント基板に実装される点灯回路の入力電源電圧及び
電力が供給される放電灯の種類を共通とし、夫々の点灯
回路の点灯方式が略同一で、両プリント基板に実装され
る電子部品の約５０％以上を互いに共通とし、第２のプ
リント基板収納ケースの断面の幅、高さの寸法を、第１
のプリント基板収納ケースの幅、高さの寸法に比べて小
さくし、第２のプリント基板収納ケースの断面の長さ寸
法を第１のプリント基板収納ケースの断面の長さ寸法よ
りも小さくし、使用器具に応じてこれらプリント基板収
納ケースを選択使用するので、細断面の第１のプリント
基板収納ケースを用いることにより高さが低く且つ幅が
狭く、設置面積を縮小したデザイン重視の器具に対応さ
せることができ、その結果Ｔ５型等の細い管径の放電灯
に対応でき、またＴ８型のような管径の太い放電灯等に
対応した器具に対して、太断面の第２のプリント基板収
納ケースを用いれば、容積拡大による実装電子部品の温
度上昇の低減が図れて、電子部品の定格低減、回路構成
の簡略化、放熱機構部品の排除等が図れて低コスト化が
図れるという効果があり、使用目的に応じてケースの選
択を可能とした放電灯点灯装置を提供できる。According to the present invention, the first printed circuit board storage case for storing a printed circuit board on which electronic components of a lighting circuit for supplying electric power to a discharge lamp are mounted has a thick cross section. And a second type of printed circuit board storage case for storing a printed circuit board on which electronic components of a lighting circuit for supplying electric power to the discharge lamp are mounted. The first printed circuit board stored in the first printed circuit board storage case determines the input power supply voltage of the lighting circuit mounted on the second printed circuit board stored in the printed circuit board storage case and the type of discharge lamp supplied with power. The lighting circuits to be mounted on each other have a common input power supply voltage and a common type of discharge lamp to which power is supplied, and the lighting methods of the respective lighting circuits are substantially the same. Common and to% or more from each other, the width of the cross section of the second printed circuit board storage case, the height dimension, the first
The width and height of the printed circuit board storage case are smaller than the dimensions of the cross section of the second printed circuit board storage case, and These printed circuit board storage cases are selected and used according to the equipment used. By using the first printed circuit board storage case with a narrow cross section, it is low in height and narrow in width, and can be used for design-oriented equipment with a reduced installation area. As a result, the second printed circuit board having a large cross section can be used for an appliance corresponding to a discharge lamp having a small tube diameter such as a T5 type, and for an appliance corresponding to a discharge lamp having a large tube diameter such as a T8 type. The use of a storage case can reduce the rise in temperature of mounted electronic components due to an increase in volume, reduce the rating of electronic components, simplify the circuit configuration, eliminate heat-dissipating components, and reduce costs. There, it is possible to provide a discharge lamp lighting device capable of selecting cases according to the intended use.

【００２６】請求項２の発明は、請求項１の発明におい
て、点灯回路を、交流電源を整流して直流を得る整流回
路を含む電源入力部と、該電源入力部から直流を高周波
に変換するインバータ回路と、該インバータ回路の高周
波電力を放電灯へ供給するトランスやインダクタンス等
の磁性部品から構成される出力部とで構成し、第２のプ
リント基板収納ケースに収納される第２のプリント基板
の一端部表面を上記整流回路の電子部品を実装する第１
の領域とし、他端部表面を出力部の磁性部品を実装する
第２の領域とし、これら両端部の間の中間部のプリント
基板表面をインバータ回路のスイッチング素子等の発熱
部品を実装する第３の領域としたので、第２のプリント
基板収納ケース内の温度を平均化して、使用部品の温度
規定値を満足することができるという効果がある。According to a second aspect of the present invention, in the first aspect of the present invention, the lighting circuit includes a power supply input section including a rectifier circuit for rectifying an AC power supply to obtain a direct current, and converts the direct current to a high frequency from the power supply input section. A second printed circuit board, which is composed of an inverter circuit and an output unit formed of a magnetic component such as a transformer or an inductance for supplying high-frequency power of the inverter circuit to the discharge lamp and housed in a second printed circuit board storage case The surface of one end of the first part on which the electronic component of the rectifier circuit is mounted is
The surface of the other end portion is a second region for mounting the magnetic component of the output portion, and the surface of the printed circuit board in the middle portion between the two end portions is the third region for mounting the heat-generating component such as the switching element of the inverter circuit. Therefore, there is an effect that the temperature in the second printed circuit board storage case can be averaged, and the specified temperature value of the used component can be satisfied.

【００２７】請求項３の発明は、請求項２の発明におい
て、上記第１の領域と第３の領域との間間及び第３の領
域と第２の領域との間のプリント基板の表面に夫々、電
源入力部やインバータ回路に用いられるコンデンサ等の
低発熱部品を実装するとともに第２のプリント基板の短
手の幅寸法の５０％以上の空間を確保した第１、第２の
低発熱領域を夫々設け、上記発熱部品にパッケージタイ
プの部品を用い、該発熱部品を第２のプリント基板収納
ケース内に第２のプリント基板を収納した時に第２のプ
リント基板収納ケースの内面に接触するように第３の領
域の片側に直立配置したので、熱の弱いコンデンサの使
用温度を満足する温度下に於けるという効果があり、更
に発熱部品の熱をケースを利用して放熱することがで
き、その結果ケース内の温度を低下させることができ
る。また発熱部品をパッケージタイプの素子で構成し、
且つ集中配置することで、ケースの放熱部分の加工等を
最小限に止めて、放熱用機構部品のコストダウンも図る
ことが可能となり、更に組み立て工程における作業効率
も良くなる。According to a third aspect of the present invention, in the second aspect, the surface of the printed circuit board between the first region and the third region and between the third region and the second region is provided. First and second low heat generating areas in which low heat generating components such as a power input unit and a capacitor used for an inverter circuit are mounted and a space of 50% or more of the width of the short side of the second printed circuit board is secured. And a package type component is used as the heat-generating component, and the heat-generating component contacts the inner surface of the second printed circuit board storage case when the second printed circuit board is stored in the second printed circuit board storage case. In addition, since it is arranged upright on one side of the third region, it has the effect of being at a temperature that satisfies the operating temperature of the capacitor having weak heat, and furthermore, the heat of the heat-generating components can be radiated using the case. The resulting case Temperature can be lowered to the. In addition, the heat-generating components are composed of package type elements,
In addition, the centralized arrangement minimizes processing of the heat radiating portion of the case, reduces the cost of the heat radiating mechanism parts, and improves work efficiency in the assembly process.

【００２８】請求項４の発明は、請求項３の発明におい
て、第３の領域の裏面及び第１、第２の低域発熱領域の
少なくとも一方の裏面で且つ上記発熱部品の配置位置と
は反対側に点灯回路に使用する表面実装型の電子部品を
実装したので、表面実装型の電子部品に与える熱影響を
最小に抑えることができる。請求項５の発明は、請求項
２乃至４の何れかに記載の発明において、交流電源を接
続する入力端子を電源入力部側に設け、放電灯を接続す
る出力端子を出力部側に設けてあるので、入出力端子を
分離し且つ実装構成を合理的なものとする。According to a fourth aspect of the present invention, in the third aspect of the present invention, the back surface of the third region and the back surface of at least one of the first and second low-frequency heat generating regions are opposite to the arrangement position of the heat generating components. Since the surface-mounted electronic components used in the lighting circuit are mounted on the side, it is possible to minimize the thermal effect on the surface-mounted electronic components. According to a fifth aspect of the present invention, in the invention according to any one of the second to fourth aspects, an input terminal for connecting an AC power source is provided on a power input portion side, and an output terminal for connecting a discharge lamp is provided on an output portion side. Therefore, the input / output terminals are separated and the mounting configuration is rational.

【００２９】請求項６の発明は、請求項３の発明におい
て、第１の低発熱領域に実装される電子部品にはインバ
ータ回路の電源となるアルミ電解コンデンサからなる平
滑用コンデンサを含み、第２の低発熱領域に実装される
部品にはインバータ回路の制御回路に用いるコンデンサ
を含み、第２の低発熱領域の平均温度が第１の低発熱領
域の平均温度より低くなるように、第３の領域に実装さ
れる発熱部品を配置したので、それぞれのコンデンサに
適した使用温度に対応するような温度分布を得ることが
できる。According to a sixth aspect of the present invention, in the third aspect of the present invention, the electronic components mounted in the first low heat generation area include a smoothing capacitor made of an aluminum electrolytic capacitor serving as a power supply of an inverter circuit, and The components mounted in the low heat generation area include a capacitor used for a control circuit of the inverter circuit, and the third heat generation area is configured so that the average temperature of the second low heat generation area is lower than the average temperature of the first low heat generation area. Since the heat-generating components mounted in the area are arranged, it is possible to obtain a temperature distribution corresponding to a use temperature suitable for each capacitor.

【００３０】請求項７の発明は、請求項１の発明におい
て、１本あたりの放電灯の消費電力を約４５Ｗとする２
本の高周波点灯専用放電灯を負荷であり、第１のプリン
ト基板収納ケースの幅を４５ｍｍ未満とし、高さを２６
ｍｍ未満とし、長さを３６０ｍｍより長くし、第２のプ
リント基板収納ケースの幅を４５ｍｍより大きくし、高
さを２６ｍｍ未満とし、長さを３６０ｍｍ未満としたの
で、Ｔ５型のような細い管径の放電灯に対応する器具
や、Ｔ８型のような太い管径の放電灯に対応するの放電
灯を２灯並行装着する器具に対応するケースを実現でき
る。According to a seventh aspect of the present invention, in the first aspect of the present invention, the power consumption of each discharge lamp is set to about 45 W2.
The high-frequency lighting exclusive discharge lamp is a load, the width of the first printed circuit board storage case is less than 45 mm, and the height is 26
mm, the length is greater than 360 mm, the width of the second printed circuit board storage case is greater than 45 mm, the height is less than 26 mm, and the length is less than 360 mm. It is possible to realize a case corresponding to an appliance corresponding to a discharge lamp having a diameter and an appliance corresponding to a discharge lamp having a large tube diameter such as a T8 type and having two discharge lamps mounted in parallel.

【図面の簡単な説明】[Brief description of the drawings]

【図１】（ａ）は本発明に係わる実施形態の太断面のプ
リント基板収納ケースの上面図である。（ｂ）は同上の
側面図である。（ｃ）は同上の正面図である。FIG. 1A is a top view of a thick printed circuit board storage case according to an embodiment of the present invention. (B) is a side view of the same. (C) is a front view of the same.

【図２】同上に用いる点灯回路の回路図である。FIG. 2 is a circuit diagram of a lighting circuit used in the lighting device.

【図３】（ａ）は同上に用いるプリント基板の電子部品
の実装状態を示す上面図である。（ｂ）は同上に用いる
プリント基板の電子部品の実装状態を示す下面図であ
る。FIG. 3A is a top view showing a mounted state of an electronic component on a printed circuit board used in the embodiment. FIG. 2B is a bottom view showing a mounted state of the electronic component on the printed circuit board used in the embodiment.

【図４】（ａ）は本発明に係わる細断面のプリント基板
収納ケースの上面図である。（ｂ）は同上の側面図であ
る。（ｃ）は同上の正面図である。FIG. 4A is a top view of a printed circuit board storage case having a small cross section according to the present invention. (B) is a side view of the same. (C) is a front view of the same.

【図５】同上に用いる点灯回路の回路図である。FIG. 5 is a circuit diagram of a lighting circuit used in the lighting device.

【符号の説明】[Explanation of symbols]

２ プリント基板収納ケース 2 Printed circuit board storage case

───────────────────────────────────────────────────── フロントページの続き (72)発明者 工藤 康宏 大阪府門真市大字門真1048番地松下電工株 式会社内 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuhiro Kudo 1048 Odakadoma, Kadoma City, Osaka Prefecture Matsushita Electric Works, Ltd.

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】放電灯に電力を供給するための点灯回路の
電子部品が実装されるプリント基板を収納する第１のプ
リント基板収納ケースと、第１のプリント基板に対して
太い断面を有し、放電灯に電力を供給するための点灯回
路の電子部品が実装されるプリント基板を収納する第２
のプリント基板収納ケースとの２タイプのプリント基板
収納ケースが準備され、該第２のプリント基板収納ケー
スに収納される第２のプリント基板に実装される点灯回
路の入力電源電圧及び電力が供給される放電灯の種類を
第１のプリント基板収納ケースに収納される第１のプリ
ント基板に実装される点灯回路の入力電源電圧及び電力
が供給される放電灯を共通のものとし、夫々の点灯回路
の点灯方式が略同一で、両プリント基板に実装される電
子部品の約５０％以上を互いに共通とし、第２のプリン
ト基板収納ケースの断面の幅、高さの寸法を、第１のプ
リント基板収納ケースの幅、高さの寸法に比べて小さく
し、第２のプリント基板収納ケースの断面の長さ寸法を
第１のプリント基板収納ケースの断面の長さ寸法よりも
小さくし、使用器具に応じてこれらプリント基板収納ケ
ースを選択使用することを特徴とする放電灯点灯装置。1. A first printed circuit board storage case for housing a printed circuit board on which electronic components of a lighting circuit for supplying power to a discharge lamp are mounted, and a thick section with respect to the first printed circuit board. And a second housing for a printed circuit board on which electronic components of a lighting circuit for supplying power to the discharge lamp are mounted.
And two types of printed circuit board storage cases are prepared, and the input power supply voltage and the power of the lighting circuit mounted on the second printed circuit board stored in the second printed circuit board storage case are supplied. The types of discharge lamps are common to the discharge lamps to which the input power supply voltage and the power are supplied to the lighting circuit mounted on the first printed circuit board housed in the first printed circuit board storage case, and the respective lighting circuits Are approximately the same, and about 50% or more of the electronic components mounted on both printed circuit boards are common to each other, and the width and height dimensions of the cross section of the second printed circuit board storage case are set to the first printed circuit board. The width of the storage case is made smaller than the dimensions of the width and height thereof, and the length of the cross section of the second printed circuit board storage case is made smaller than the length of the cross section of the first printed circuit board storage case. The discharge lamp lighting apparatus, characterized by using selecting these PCB storage case according to. 【請求項２】点灯回路を、交流電源を整流して直流を得
る整流回路を含む電源入力部と、該電源入力部から直流
を高周波に変換するインバータ回路と、該インバータ回
路の高周波電力を放電灯へ供給するトランスやインダク
タンス等の磁性部品から構成される出力部とで構成し、
第２のプリント基板収納ケースに収納される第２のプリ
ント基板の一端部表面を上記整流回路の電子部品を実装
する第１の領域とし、他端部表面を出力部の磁性部品を
実装する第２の領域とし、これら両端部の間の中間部の
プリント基板表面をインバータ回路のスイッチング素子
等の発熱部品を実装する第３の領域として成ることを特
徴とする請求項１記載の放電灯点灯装置。2. A lighting circuit comprising: a power supply input section including a rectifier circuit for rectifying an AC power supply to obtain a direct current; an inverter circuit for converting the direct current into a high frequency from the power input section; It is composed of an output unit composed of magnetic components such as a transformer and an inductance to be supplied to the electric lamp,
The surface of one end of the second printed circuit board accommodated in the second printed circuit board storage case is used as a first area for mounting the electronic components of the rectifier circuit, and the other surface of the second printed circuit board is mounted with the magnetic component of the output unit. 2. The discharge lamp lighting device according to claim 1, wherein the printed circuit board surface at an intermediate portion between the two end portions is formed as a third region for mounting a heat-generating component such as a switching element of an inverter circuit. . 【請求項３】上記第１の領域と第３の領域との間間及び
第３の領域と第２の領域との間のプリント基板の表面に
夫々、電源入力部やインバータ回路に用いられるコンデ
ンサ等の低発熱部品を実装するとともに第２のプリント
基板の短手の幅寸法の５０％以上の空間を確保した第
１、第２の低発熱領域を夫々設け、上記発熱部品にパッ
ケージタイプの部品を用い、該発熱部品を第２のプリン
ト基板収納ケース内に第２のプリント基板を収納した時
に第２のプリント基板収納ケースの内面に接触するよう
に第３の領域の片側に直立配置して成ることを特徴とす
る請求項２記載の放電灯点灯装置。3. A capacitor for use in a power input unit and an inverter circuit, respectively, between the first and third regions and on the surface of the printed circuit board between the third and second regions. The first and second low heat-generating regions each having a low heat-generating component mounted thereon and having a space of 50% or more of the width of the short side of the second printed circuit board are provided. The heat-generating component is placed upright on one side of the third area so as to come into contact with the inner surface of the second printed circuit board storage case when the second printed circuit board is stored in the second printed circuit board storage case. The discharge lamp lighting device according to claim 2, wherein the discharge lamp lighting device is formed. 【請求項４】第３の領域の裏面及び第１、第２の低域発
熱領域の少なくとも一方の裏面で且つ上記発熱部品の配
置位置とは反対側に点灯回路に使用する表面実装型の電
子部品を実装して成ることを特徴とする請求項３記載の
放電灯点灯装置。4. A surface mount type electronic device used for a lighting circuit on the back surface of the third region and on the back surface of at least one of the first and second low-frequency heat generating regions and on the side opposite to the position where the heat generating components are arranged. 4. The discharge lamp lighting device according to claim 3, wherein components are mounted. 【請求項５】交流電源を接続する入力端子を電源入力部
側に設け、放電灯を接続する出力端子を出力部側に設け
て成ることを特徴とする請求項２乃至４の何れかに記載
の放電灯点灯装置。5. An apparatus according to claim 2, wherein an input terminal for connecting an AC power supply is provided on the power input section side, and an output terminal for connecting a discharge lamp is provided on the output section side. Discharge lamp lighting device. 【請求項６】第１の低発熱領域に実装される電子部品に
はインバータ回路の電源となるアルミ電解コンデンサか
らなる平滑用コンデンサを含み、第２の低発熱領域に実
装される部品にはインバータ回路の制御回路に用いるコ
ンデンサを含み、第２の低発熱領域の平均温度が第１の
低発熱領域の平均温度より低くなるように、第３の領域
に実装される発熱部品を配置して成ることを特徴とする
請求項３記載の放電灯点灯装置。6. An electronic component mounted in the first low heat generation area includes a smoothing capacitor made of an aluminum electrolytic capacitor serving as a power supply of an inverter circuit, and a component mounted in the second low heat generation area includes an inverter. A heat-generating component mounted on a third area is arranged so that an average temperature of the second low-heat area is lower than an average temperature of the first low-heat area, including a capacitor used for a control circuit of the circuit. The discharge lamp lighting device according to claim 3, wherein: