JPH07240285A - Lighting system - Google Patents
Lighting systemInfo
- Publication number
- JPH07240285A JPH07240285A JP2935894A JP2935894A JPH07240285A JP H07240285 A JPH07240285 A JP H07240285A JP 2935894 A JP2935894 A JP 2935894A JP 2935894 A JP2935894 A JP 2935894A JP H07240285 A JPH07240285 A JP H07240285A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- lighting
- capacitor
- switching element
- printed
- 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.)
- Withdrawn
Links
Landscapes
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、照明負荷を点灯する為
の照明装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting device for lighting a lighting load.
【０００２】[0002]
【従来の技術】この種の第１従来例として実開昭５７−
１０９５９８号公報に記載されたものがある。本従来例
は、放電灯を点灯させる為のプリント基板上に設置され
た高周波点灯回路と、前記高周波点灯回路からの高周波
ノイズが電源へ流出するのを防止する為のノイズ防止回
路を有する放電灯点灯装置であって、前記高周波点灯回
路を前記プリント基板上の一面側に、前記ノイズ防止回
路を前記プリント基板上の他面側に配置し、且つ電源線
を短絡することにより、電源線を高周波点灯回路の各部
品と離すことができる為、輻射や浮遊容量により電源線
へ直接重畳される高周波ノイズを低減できるものであ
る。2. Description of the Related Art As a first conventional example of this kind, the actual construction of Japanese Utility Model Publication No.
There is one described in Japanese Patent No. 109598. This conventional example is a discharge lamp having a high-frequency lighting circuit installed on a printed circuit board for lighting a discharge lamp, and a noise prevention circuit for preventing high-frequency noise from the high-frequency lighting circuit from flowing out to a power supply. In the lighting device, the high-frequency lighting circuit is arranged on one surface side of the printed circuit board, the noise prevention circuit is arranged on the other surface side of the printed circuit board, and the power supply line is short-circuited so that the power supply line becomes high-frequency. Since it can be separated from each component of the lighting circuit, it is possible to reduce high frequency noise directly superposed on the power supply line due to radiation and stray capacitance.
【０００３】また、図５乃至図８は第２の従来例を示す
ものであり、図５は照明負荷を高周波で点灯させる為の
回路図を示し、図６は図５に示す回路を構成する各部品
のプリント基板Ｐ上への配置及び配線のパタ−ンを示す
模式回路図、図７は図５に示す回路の各部品のプリント
基板Ｐ上への配置及び配線のパタ−ン図、図８は図６に
示す模式回路を流れる電流経路の一態様を示すものであ
る。5 to 8 show a second conventional example, FIG. 5 shows a circuit diagram for lighting an illumination load at a high frequency, and FIG. 6 constitutes the circuit shown in FIG. FIG. 7 is a schematic circuit diagram showing the layout and wiring pattern of each component on the printed circuit board P. FIG. 7 is a pattern diagram of the layout and wiring of each component of the circuit shown in FIG. 5 on the printed circuit board P. 8 shows one mode of a current path flowing through the schematic circuit shown in FIG.
【０００４】図５に示す回路は、インバ−タ回路の如き
高周波点灯回路Ａの入力端子間に整流器ＤＢを介して交
流電源Ｖacが接続され、高周波点灯回路Ａの出力端子間
に照明負荷Ｌａが接続されている。交流電源Ｖacは整流
器ＤＢにより整流され、平滑コンデンサＣ1 により平滑
されて直流電圧に変換される。この直流電圧はスイッチ
ング素子Ｑ1 を介してコンデンサＣ3 とインダクタＬ1
とから成る共振回路に印加される。スイッチング素子Ｑ
1 及びスイッチング素子Ｑ2 は高周波でスイッチングさ
れる。コンデンサＣ3 とインダクタＬ1 とから成る共振
回路には高周波の共振電圧が発生する。この共振電圧は
コンデンサＣ2 を介して照明負荷Ｌａに印加され、照明
負荷Ｌａは安定に点灯維持する。ここで照明負荷Ｌａは
放電灯Ｌａとする。In the circuit shown in FIG. 5, an AC power supply Vac is connected between the input terminals of a high frequency lighting circuit A such as an inverter circuit via a rectifier DB, and a lighting load La is placed between the output terminals of the high frequency lighting circuit A. It is connected. The AC power supply Vac is rectified by the rectifier DB, smoothed by the smoothing capacitor C 1 and converted into a DC voltage. This DC voltage is passed through the switching element Q 1 to the capacitor C 3 and the inductor L 1
Is applied to the resonance circuit consisting of. Switching element Q
1 and switching element Q 2 are switched at high frequency. A high frequency resonance voltage is generated in the resonance circuit including the capacitor C 3 and the inductor L 1 . This resonance voltage is applied to the lighting load La via the capacitor C 2 , and the lighting load La maintains stable lighting. Here, the lighting load La is a discharge lamp La.
【０００５】ここで、上述の如き照明装置は、図６、図
７に示す様に、コンデンサＣ1 、コンデンサＣ2 、コン
デンサＣ3 、スイッチング素子Ｑ1 、スイッチング素子
Ｑ2、インダクタＬ1 とから成る高周波点灯回路Ａ、整
流器ＤＢ、スイッチング素子Ｑ1 とスイッチング素子Ｑ
2 とを駆動する制御回路Ｘを、プリント基板Ｐ上に配置
することにより構成されている。従って、スイッチング
素子Ｑ1 がオンの時に形成される、高周波点灯回路Ａの
電流経路Ｉ2 は、図６に示す様に、平滑コンデンサＣ1
→スイッチング素子Ｑ1 →コンデンサＣ2 →インダクタ
ンスＬ1 →放電灯Ｌａ→平滑コンデンサＣ1 という電流
経路Ｉ2 となる。Here, the illumination device as described above includes a capacitor C 1 , a capacitor C 2 , a capacitor C 3 , a switching element Q 1 , a switching element Q 2 and an inductor L 1 as shown in FIGS. 6 and 7. High frequency lighting circuit A, rectifier DB, switching element Q 1 and switching element Q
The control circuit X for driving the drive circuit 2 and the drive circuit 2 is arranged on the printed circuit board P. Therefore, the current path I 2 of the high frequency lighting circuit A, which is formed when the switching element Q 1 is turned on, has a smoothing capacitor C 1 as shown in FIG.
→ Switching element Q 1 → Capacitor C 2 → Inductance L 1 → Discharge lamp La → Smoothing capacitor C 1 The current path I 2 is obtained.
【０００６】[0006]
【発明が解決しようとする課題】しかし、上記第１の従
来例では、高周波点灯回路からの高周波ノイズが電源線
へ直接重畳されることは低減できても、他の周辺機器に
対して誤動作などの悪影響を与える恐れがあり、また、
ノイズ防止回路が必要な為、装置が大型化するという問
題がある。However, in the first conventional example described above, although the high frequency noise from the high frequency lighting circuit can be reduced from being directly superposed on the power supply line, it may malfunction with respect to other peripheral devices. May adversely affect the
Since a noise prevention circuit is required, there is a problem that the device becomes large.
【０００７】また、第２の従来例では、図７に示す様な
回路部品のプリント基板Ｐ上への配置及び配線のパタ−
ンにすると、スイッチング素子Ｑ1 がオンの時は、図８
に示す様な電流経路Ｉ2 に高周波電流が流れると、電流
経路Ｉ2 が流れる方向に対して垂直方向に前記スイッチ
ング素子Ｑ1 のスイッチング周波数と同じ周波数の磁界
Ｊ2 が発生し、これが電流経路Ｉ2 によって発生する輻
射ノイズとして放射され、周辺機器及び自身の電子回路
に悪影響を及ぼす恐れがある、という問題がある。In the second conventional example, the pattern of the arrangement and wiring of the circuit components on the printed board P as shown in FIG.
If the switching element Q 1 is turned on,
When a high-frequency current flows through the current path I 2 as shown in Fig. 2 , a magnetic field J 2 having the same frequency as the switching frequency of the switching element Q 1 is generated in the direction perpendicular to the direction in which the current path I 2 flows. There is a problem that it is radiated as radiation noise generated by I 2 and may adversely affect peripheral equipment and its own electronic circuit.
【０００８】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、特別な装置を用いずに、
また、装置を大型化することなく、他の周辺機器に対し
て誤動作などの悪影響を与えない様な照明装置を提供す
ることにある。The present invention has been made in view of the above problems, and its object is to use a special device without using a special device.
Another object of the present invention is to provide an illuminating device that does not adversely affect other peripheral devices such as malfunction without increasing the size of the device.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決する為
に、本発明は、照明負荷を点灯する点灯回路をプリント
基板に配設してある照明装置に於いて、前記点灯回路を
構成する各部品の配置を、前記点灯回路に流れる電流の
経路が少なくとも２つの閉ル−プを形成する様に配置す
ると共に、前記閉ル─プに電流が流れることにより発生
する、少なくとも２つの磁界が互いに打ち消しあう様
に、配置したことものである。In order to solve the above-mentioned problems, the present invention provides a lighting device in which a lighting circuit for lighting an illumination load is arranged on a printed circuit board. The components are arranged such that the paths of the currents flowing through the lighting circuit form at least two closed loops, and at least two magnetic fields generated by the currents flowing through the closed loops are mutually adjacent. It is arranged so as to cancel each other out.
【００１０】[0010]
【作用】本発明によれば、図３に示す様に、点灯回路に
流れる電流の経路が形成され、その経路は、平滑コンデ
ンサＣ1 →スイッチング素子Ｑ1 →コンデンサＣ2 →イ
ンダクタンスＬ1 →放電灯Ｌａ→平滑コンデンサＣ1 と
なる。そして、２つの閉ル─プＨ11及び閉ル−プＨ12に
電流が流れることにより、２つの磁界Ｊ11及び磁界Ｊ12
が互いに打ち消しあう様な向きに発生することで、点灯
回路より発生する輻射ノイズが低減される。According to the present invention, as shown in FIG. 3, a path for the current flowing through the lighting circuit is formed, and the path is a smoothing capacitor C 1 → switching element Q 1 → capacitor C 2 → inductance L 1 → emission. The electric lamp La becomes the smoothing capacitor C 1 . Then, a current flows through the two closed loops H 11 and the closed loops H 12 , so that two magnetic fields J 11 and J 12 are generated.
Are generated so that they cancel each other out, the radiation noise generated from the lighting circuit is reduced.
【００１１】[0011]
【実施例】図１乃至図３は本発明に係る一実施例を示す
ものであり、図１は図５に示す回路を構成する各部品の
プリント基板Ｐ上への配置及び配線のパタ−ンを示す模
式回路図、図２は図５に示す回路の各部品のプリント基
板Ｐ上への配置及び配線のパタ−ン図、図３は図１に示
す模式回路を流れる電流経路の一態様を示すものであ
る。1 to 3 show an embodiment according to the present invention. FIG. 1 is a pattern of arrangement and wiring on a printed board P of each component constituting the circuit shown in FIG. 2 is a pattern diagram showing the layout and wiring of each component of the circuit shown in FIG. 5 on the printed circuit board P, and FIG. 3 shows one mode of current paths flowing in the schematic circuit shown in FIG. It is shown.
【００１２】本実施例が前記第２の従来例の回路の各部
品の配置及び配線のパタ−ンと異なる点は、平滑コンデ
ンサＣ1 →スイッチング素子Ｑ1 →コンデンサＣ2 →イ
ンダクタンスＬ1 →放電灯Ｌａ→平滑コンデンサＣ1 と
いう電流経路Ｉ1 が、プリント基板Ｐ上に於いてコンデ
ンサＣ2 とインダクタＬ1 との接続線の一部と、平滑コ
ンデンサＣ1 の負側と放電灯Ｌａとの接続線の一部とが
交差する様にしたことである。The present embodiment differs from the second conventional example in the arrangement and wiring pattern of each component of the circuit, in that the smoothing capacitor C 1 → switching element Q 1 → capacitor C 2 → inductance L 1 → emission lamp La → current path I 1 of the smoothing capacitor C 1 is a part of the connecting line between the capacitor C 2 and the inductor L 1 in the printed circuit board P, the negative side of the smoothing capacitor C 1 and the discharge lamp La This means that some of the connecting lines intersect.
【００１３】この電流経路Ｉ1 は図３に示す様に２つの
閉ル−プＨ11及び閉ル−プＨ12から成り、この２つの閉
ル−プＨ11及び閉ル−プＨ12がそれぞれ電流の流れる方
向に対して垂直方向に磁界Ｊ11及び磁界Ｊ12を発生す
る。図３の矢印が示す方向に電流が流れると、閉ル−プ
Ｈ11では図３の上から見て右回りに電流が流れ、閉ル−
プＨ12は図３の上から見て左回りに電流が流れるので、
磁界Ｊ11は図３の上から見て下方向に、及び磁界Ｊ12は
図３の上から見て上方向にと、互いに逆向きの磁界が発
生する。[0013] The current path I 1 2 Tsuno閉Ru As shown in FIG. 3 - consists flop H 12, the 2 Tsuno閉Ru - - flops H 11 and閉Ru flops H 11 and閉Ru - flop H 12 is A magnetic field J 11 and a magnetic field J 12 are generated in a direction perpendicular to the direction of current flow. When a current flows in the direction indicated by the arrow in FIG. 3, in the closed loop H 11 , a current flows clockwise when viewed from above in FIG.
Since flop H 12 current flows counterclockwise as viewed from the top of FIG. 3,
The magnetic field J 11 is generated in the downward direction when viewed from above in FIG. 3, and the magnetic field J 12 is generated in the upward direction when viewed from above in FIG.
【００１４】この様にすると電流経路Ｉ1 に電流が流れ
ることにより発生する磁界Ｊ11及び磁界Ｊ12が互いに打
ち消しあうので、高周波点灯回路Ａにより発生する輻射
ノイズが低減され、ノイズ防止回路などを必要とせず、
特別な装置を用いずに大型化することなく、周辺機器及
び自身の電子回路に悪影響を及ぼすことを防ぐことがで
きる。In this way, the magnetic field J 11 and the magnetic field J 12 generated by the current flowing in the current path I 1 cancel each other out, so that the radiation noise generated by the high frequency lighting circuit A is reduced, and a noise prevention circuit or the like is provided. Without needing
It is possible to prevent the peripheral devices and their own electronic circuits from being adversely affected without increasing the size without using a special device.
【００１５】なお、本実施例の２つの閉ル−プＨ11及び
閉ル−プＨ12で囲まれた面積を等しくすると、磁界Ｊ11
及び磁界Ｊ12は等しくなって互いに打ち消しあい、高周
波点灯回路Ａにより発生する輻射ノイズはほとんど零に
なり、また各々の面積を小さくすると、磁界Ｊ11及び磁
界Ｊ12は小さくなるので最も効果があるが、本発明はこ
れに限定されない。また、本実施例では電流経路Ｉ1 を
閉ル−プが２つになる様にしたが、閉ル−プはｎ＋１個
（ｎは自然数）であっても、磁界が互いに打ち消しあう
様に高周波点灯回路Ａの各部品を配置及び配線すればよ
く、更にその電流経路Ｉ1 も図３に示す形状に限定され
ず、加えて、プリント基板Ｐは多層構造であってもよ
い。When the areas enclosed by the two closed loops H 11 and closed loop H 12 of this embodiment are made equal, a magnetic field J 11 is obtained.
And the magnetic fields J 12 are equal and cancel each other out, the radiant noise generated by the high frequency lighting circuit A becomes almost zero, and the magnetic fields J 11 and J 12 are the most effective when the area of each is reduced. However, the present invention is not limited to this. In this embodiment, the current path I 1 has two closed loops. However, even if the number of closed loops is n + 1 (n is a natural number), the high frequency is such that the magnetic fields cancel each other out. The components of the lighting circuit A may be arranged and wired, and the current path I 1 thereof is not limited to the shape shown in FIG. 3, and the printed circuit board P may have a multilayer structure.
【００１６】また、本実施例ではランプ電流が図４
（ａ）に示す様な高周波電流より発生する磁界による輻
射ノイズの低減の場合に用いたが、本発明は、図４
（ｂ）に示す様な低周波の矩形波電流の場合の高周波リ
ップル分によるノイズの低減に用いても、図４（ｃ）に
示す様な高周波リップル分が重畳された直流点灯方式の
場合の高周波リップル分によるノイズの低減に用いても
よく、また、本実施例では照明負荷を放電灯にしたが白
熱灯でもよく、点灯周波数は高周波としたが、可聴周波
数または音響的共鳴現象の生じる周波数でもよい。In this embodiment, the lamp current is as shown in FIG.
Although it was used in the case of reducing the radiation noise due to the magnetic field generated from the high frequency current as shown in FIG.
Even when it is used to reduce the noise due to the high frequency ripple in the case of a low frequency rectangular wave current as shown in (b), in the case of the DC lighting method in which the high frequency ripple as shown in FIG. It may be used to reduce noise due to high-frequency ripple, and in the present embodiment, the lighting load is a discharge lamp, but an incandescent lamp may be used, and the lighting frequency is a high frequency, but an audible frequency or a frequency at which an acoustic resonance phenomenon occurs. But it's okay.
【００１７】[0017]
【発明の効果】本発明は上記の様に、照明負荷を点灯す
る点灯回路をプリント基板に配設してある照明装置に於
いて、点灯回路を構成する各部品の配置を、点灯回路に
流れる電流の経路が少なくとも２つの閉ル−プを形成す
る様に配置すると共に、閉ル─プに電流が流れることに
より発生する、少なくとも２つの磁界が互いに打ち消し
あう様に配置したことにより、点灯回路より発生する輻
射ノイズが低減され、ノイズ防止回路などを必要とせ
ず、特別な装置を用いずに大型化することなく、周辺機
器及び自身の電子回路に悪影響を及ぼすことを防ぐこと
ができる。As described above, according to the present invention, in the lighting device in which the lighting circuit for lighting the lighting load is arranged on the printed circuit board, the arrangement of each component constituting the lighting circuit flows to the lighting circuit. The lighting circuit is arranged such that the current paths form at least two closed loops, and at least two magnetic fields generated by the current flowing through the closed loops cancel each other. Radiation noise generated more is reduced, a noise prevention circuit or the like is not required, and it is possible to prevent adverse effects on peripheral devices and own electronic circuits without increasing the size without using a special device.
【図１】本発明の実施例に係る、照明負荷を点灯させる
為の回路を構成する各部品のプリント基板上への配置及
び配線のパタ−ンを示す模式回路図である。FIG. 1 is a schematic circuit diagram showing a layout and wiring pattern of each component constituting a circuit for lighting an illumination load on a printed board according to an embodiment of the present invention.
【図２】上記実施例に係る、照明負荷を点灯させる為の
回路を構成する各部品のプリント基板上への配置及び配
線のパタ−ン図である。FIG. 2 is a pattern diagram of arrangement and wiring of each component constituting a circuit for lighting an illumination load on a printed circuit board according to the above embodiment.
【図３】上記実施例に係る、図１に示す模式回路を流れ
る電流経路の一態様を示す図である。FIG. 3 is a diagram showing one mode of a current path flowing through the schematic circuit shown in FIG. 1 according to the embodiment.
【図４】上記実施例に係る照明負荷のランプ電流波形を
示す図である。FIG. 4 is a diagram showing a lamp current waveform of a lighting load according to the embodiment.
【図５】本発明に係る照明負荷点灯回路図である。FIG. 5 is a lighting load lighting circuit diagram according to the present invention.
【図６】本発明の第２従来例に係る、照明負荷を点灯さ
せる為の回路を構成する各部品のプリント基板上への配
置及び配線のパタ−ンを示す模式回路図である。FIG. 6 is a schematic circuit diagram showing an arrangement and wiring pattern of each component constituting a circuit for lighting an illumination load on a printed board according to a second conventional example of the present invention.
【図７】上記従来例に係る、照明負荷を点灯させる為の
回路を構成する各部品のプリント基板上への配置及び配
線のパタ−ン図である。FIG. 7 is a pattern diagram of arrangement and wiring on a printed circuit board of each component constituting a circuit for lighting an illumination load according to the conventional example.
【図８】上記従来例に係る、図６に示す模式回路を流れ
る電流経路の一態様を示す図である。FIG. 8 is a diagram showing one mode of a current path through the schematic circuit shown in FIG. 6 according to the conventional example.
Ｌａ 照明負荷 Ａ 高周波点灯回路 Ｐ プリント基板 Ｈ 閉ル−プ Ｉ 電流経路 Ｊ 磁界 La Lighting load A High frequency lighting circuit P Printed circuit board H Closed loop I Current path J Magnetic field
Claims (1)
基板に配設して成る照明装置に於いて、前記点灯回路を
構成する各部品の配置を、前記点灯回路に流れる電流の
経路が少なくとも２つの閉ル−プを形成する様に配置す
ると共に、前記閉ル─プに電流が流れることにより発生
する、少なくとも２つの磁界が互いに打ち消しあう様
に、配置したことを特徴とする照明装置。1. A lighting apparatus comprising a printed circuit board and a lighting circuit for lighting a lighting load, wherein the components of the lighting circuit are arranged such that at least two current paths flow through the lighting circuit. An illuminating device which is arranged so as to form two closed loops, and is arranged so that at least two magnetic fields generated by a current flowing through the closed loops cancel each other out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2935894A JPH07240285A (en) | 1994-02-28 | 1994-02-28 | Lighting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2935894A JPH07240285A (en) | 1994-02-28 | 1994-02-28 | Lighting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07240285A true JPH07240285A (en) | 1995-09-12 |
Family
ID=12273977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2935894A Withdrawn JPH07240285A (en) | 1994-02-28 | 1994-02-28 | Lighting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07240285A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10199688A (en) * | 1997-01-14 | 1998-07-31 | Matsushita Electric Works Ltd | Discharge lamp lighting device |
| JP2003086389A (en) * | 2001-09-07 | 2003-03-20 | Denso Corp | Discharge lamp device |
-
1994
- 1994-02-28 JP JP2935894A patent/JPH07240285A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10199688A (en) * | 1997-01-14 | 1998-07-31 | Matsushita Electric Works Ltd | Discharge lamp lighting device |
| JP2003086389A (en) * | 2001-09-07 | 2003-03-20 | Denso Corp | Discharge lamp device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20010508 |