JPH042098A - Discharging lamp lighting device - Google Patents

Discharging lamp lighting device

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Publication number
JPH042098A
JPH042098A JP10218590A JP10218590A JPH042098A JP H042098 A JPH042098 A JP H042098A JP 10218590 A JP10218590 A JP 10218590A JP 10218590 A JP10218590 A JP 10218590A JP H042098 A JPH042098 A JP H042098A
Authority
JP
Japan
Prior art keywords
discharge lamp
circuit
frequency voltage
discharge lamps
voltage
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.)
Granted
Application number
JP10218590A
Other languages
Japanese (ja)
Other versions
JP2600433B2 (en
Inventor
Yoshiki Igarashi
芳貴 五十嵐
Hiroyoshi Yamazaki
山崎 広義
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2102185A priority Critical patent/JP2600433B2/en
Publication of JPH042098A publication Critical patent/JPH042098A/en
Application granted granted Critical
Publication of JP2600433B2 publication Critical patent/JP2600433B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は高周波電圧発生回路を使用して複数個の放電
灯を点灯させる放電灯点灯装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a discharge lamp lighting device for lighting a plurality of discharge lamps using a high frequency voltage generating circuit.

[従来の技術] 蛍光灯など放電灯を複数点灯し、調光することができる
点灯装置として2例えば特開昭62−200685号公
報に示されたものがある。
[Prior Art] Two lighting devices capable of lighting and controlling a plurality of discharge lamps such as fluorescent lamps are disclosed in, for example, Japanese Patent Laid-Open No. 62-200685.

第4図はここに示された従来の放電灯点灯装置の回路で
あり、同図において、(1)は直流電源。
FIG. 4 shows a circuit of the conventional discharge lamp lighting device shown here, and in the figure, (1) is a DC power supply.

(2)は抵抗、(3)はコンデンサi4)  (5)(
6)はそれぞれダイオード、(7)はトリガ素子。
(2) is a resistor, (3) is a capacitor i4) (5) (
6) are diodes, and (7) is a trigger element.

(8) 、  (9)はトランジスタからなるインバー
タのスイッチング素子、 (4o)、 (u)は抵抗、
 (12)は駆動トランス、 (13)は結合コンデン
サ、 (14)は限流コイル、 (15)は共振コイル
、 (16)は負荷である放電灯、 (17)は高周波
電圧発生回路、 (18)は予熱トランス、 (19)
は予熱用スイッチである。
(8) and (9) are inverter switching elements consisting of transistors, (4o) and (u) are resistors,
(12) is a drive transformer, (13) is a coupling capacitor, (14) is a current limiting coil, (15) is a resonant coil, (16) is a discharge lamp which is a load, (17) is a high frequency voltage generation circuit, (18) ) is a preheating transformer, (19)
is a preheating switch.

次に動作について説明する。Next, the operation will be explained.

トリガ素子(7)が導通しスイッチング素子(9)がO
Nすると、スイッチング素子(8)をOFFし、トリガ
素子(7)に追従してスイッチング素子(8) 、 (
9)はそれぞれ交互に0N−OFFI、、高周波電圧を
発生する。
The trigger element (7) is conductive and the switching element (9) is O.
When N, the switching element (8) is turned off, and the switching element (8) follows the trigger element (7).
9) generate 0N-OFFI, high frequency voltage alternately.

そして限流コイル(14)と共振コンデンサ(I5)に
よって共振的な電圧を発生するので、放電灯[16a)
 、 (16b)は放電を開始し1点灯する。
Since a resonant voltage is generated by the current limiting coil (14) and the resonant capacitor (I5), the discharge lamp [16a]
, (16b) starts discharging and lights up once.

この種の装置では放電灯(16a) 、  (16b)
は直列に接続されているので1例えば高周波電圧発生回
路(17)のスイッチング素子(8) 、 (9>の動
作を変えて放電灯(16a) 、  (16b)の調光
を行なうときは、双方の放電灯(16a) 、 (16
b)は同一の調光度となる。また片方の放電灯例えば(
16a)が不点灯となれば必然的に他方の放電灯(16
b)も消灯することとなる。
In this type of device, discharge lamps (16a), (16b)
For example, when changing the operation of the switching elements (8) and (9) of the high-frequency voltage generation circuit (17) to dim the discharge lamps (16a) and (16b), both are connected in series. discharge lamp (16a), (16
b) results in the same dimming degree. Also, one discharge lamp, for example (
If the discharge lamp 16a) goes out, the other discharge lamp (16a) will inevitably turn off.
b) will also be turned off.

[発明が解決しようとする課題] 従来の放電灯点灯装置は以上のように構成されていたの
で、負荷を全灯について調光するか、または消灯するこ
ととなり、−灯でも寿命などの異常で不点灯になると、
全灯が不点灯になってしまつという問題点があった。
[Problems to be Solved by the Invention] Since the conventional discharge lamp lighting device was configured as described above, the load was to be adjusted or turned off for all the lamps, and even the lamps had to be turned off due to abnormalities such as the end of their lifespan. When the light goes out,
There was a problem that all the lights would turn off.

この発明は上記のような問題点を解決するためになされ
たもので、複数の放電灯を共通の高周波電圧発生回路で
点灯しながら、−灯でも放電灯が異常になれば、これに
対する電力の供給を個別に制限することができる放電灯
点灯装置を得ることを目的とする。
This invention was made in order to solve the above-mentioned problems, and when a plurality of discharge lamps are lit by a common high-frequency voltage generation circuit, if one of the discharge lamps becomes abnormal, the electric power for the negative lamp becomes abnormal. An object of the present invention is to obtain a discharge lamp lighting device that can individually limit supply.

[課題を解決するための手段] この発明に係る放電灯点灯装置は、負荷である複数の放
電灯を並列に接続し高周波電圧を供給する高周波電圧発
生回路と、上記各放電灯と直列に接続されたそれぞれ複
数の結合コンデンサ、限流コイルおよびスイッチ回路と
、上記各放電灯と並列に接続された複数の共振コンデン
サと。
[Means for Solving the Problems] A discharge lamp lighting device according to the present invention includes a high-frequency voltage generation circuit that connects a plurality of discharge lamps as loads in parallel and supplies a high-frequency voltage, and is connected in series with each of the discharge lamps. a plurality of coupling capacitors, current limiting coils and switch circuits, respectively, and a plurality of resonant capacitors connected in parallel with each of the discharge lamps.

上記各放電灯の印加電圧を監視し、この電圧が所定値を
超えるときは異常指令を出す複数の保護回路と、この保
護回路の異常指令を受け、上記高周波電圧発生回路内の
制御信号と同期し、所定の時間遅延して上記各スイッチ
回路を開く複数の開閉制御回路とを備えたものである。
Multiple protection circuits that monitor the voltage applied to each of the discharge lamps and issue an abnormality command when this voltage exceeds a predetermined value, and synchronize with the control signal in the high-frequency voltage generation circuit that receives the abnormality command from this protection circuit. The present invention also includes a plurality of opening/closing control circuits that open each of the switch circuits after a predetermined time delay.

[作用] この発明においては、各放電灯の点灯状態が異常になる
と放電灯の印加電圧が上昇するので、これを保護回路で
検出し、各放電灯と直列に接続されたスイッチ回路を高
周波電圧発生回路内の制御信号と同期し、所定の時間遅
延して開き電力の供給を個別に制限する。
[Function] In this invention, when the lighting state of each discharge lamp becomes abnormal, the voltage applied to the discharge lamp increases. This is detected by the protection circuit, and the switch circuit connected in series with each discharge lamp is connected to the high-frequency voltage. It opens in synchronization with the control signal in the generating circuit and after a predetermined time delay to individually limit the supply of power.

[発明の実施例] 以下、この発明の実施例を図について説明する。[Embodiments of the invention] Embodiments of the present invention will be described below with reference to the drawings.

従来技術と同一または相当部分は同一符号を付し、説明
を重複しない。
The same or equivalent parts as in the prior art are given the same reference numerals, and the description will not be repeated.

第一図はこの発明の放電灯点灯装置の一実施例を示す回
路図であり9図において、 (13)は放電灯(16)
と直列に接続された結合コンデンサ、 (14)は結合
コンデンサ(13)と共に放電灯(16)と直列に接続
されたインダクタである限流コイル、 (15)は放電
灯(16)の非電源側端子に接続され余熱電流を流す共
振コンデンサ、  (20)は放電灯(16)と直列に
接続され電源の供給を開閉するスイッチ回路で、ここで
はパワーMO3FETと、この素子に内蔵したダイオー
ド(21)により交流を流すことができるものである。
Figure 1 is a circuit diagram showing an embodiment of the discharge lamp lighting device of the present invention, and in Figure 9, (13) is a discharge lamp (16).
(14) is a current limiting coil which is an inductor connected in series with the coupling capacitor (13) and the discharge lamp (16); (15) is the non-power side of the discharge lamp (16); The resonant capacitor (20) is connected to the terminal and flows the residual heat current, and (20) is the switch circuit that is connected in series with the discharge lamp (16) to open and close the power supply. Here, the power MO3FET and the diode (21) built into this element are This allows for exchange to flow.

(22)は高周波電圧発生回路(17)のスイッチング
素子(8) 、 (9)を高周波で交互にON10 F
 Fさせる制御回路であり、無安定マルチバイブレータ
などの発信回路およびこの発信停止回路、スイッチング
素子(s) 、 (9)をON10 F F駆動する駆
動回路などからなる。
(22) turns on switching elements (8) and (9) of the high frequency voltage generation circuit (17) alternately at high frequency.
This is a control circuit for activating F, and includes an oscillating circuit such as an astable multivibrator, a oscillating stop circuit, and a drive circuit that drives switching elements (s) and (9) ON10 FF.

(23)は抵抗(24)、 (25)からなる分圧器(
26)によえるときは異常として指令信号を発生する保
護回路、  (27)は保護回路(23)の指令信号に
よりスイッチ回路(20)の開閉を制御する開閉制御回
路で、制御回路(22)の信号と同期し、所定時間遅延
してスイッチ回路(20)を開く遅延回路を備えている
(23) is a voltage divider (
26) is a protection circuit that generates a command signal as an abnormality; (27) is an opening/closing control circuit that controls opening and closing of the switch circuit (20) by the command signal of the protection circuit (23); The switch circuit (20) is provided with a delay circuit that opens the switch circuit (20) in synchronization with the signal and after a predetermined time delay.

以上のように、この実施例では、高周波電圧発生回路(
17)は複数の放電灯に共通であるのに対し、結合コン
デンサ(13) 、限流コイル(14) 、共振コンデ
ンサ(15)、スイッチ回路(20)、保護回路(23
) 、分圧器(26)および開閉制御回路(27)はそ
れぞれ各放電灯毎に備えられている。
As described above, in this embodiment, the high frequency voltage generation circuit (
17) is common to multiple discharge lamps, whereas coupling capacitor (13), current limiting coil (14), resonance capacitor (15), switch circuit (20), and protection circuit (23)
), a voltage divider (26), and an opening/closing control circuit (27) are provided for each discharge lamp.

次に動作について第2図および第3図のタイムチャート
を付加して説明する。
Next, the operation will be explained with reference to the time charts of FIGS. 2 and 3.

高周波電圧発生回路(17)の制御回路(22)がスイ
ッチング素子(8) 、  [9)を高周波で交互に0
N10FFさせ高周波電圧が発生しているとき、スイッ
チ回路〔20)が閉じている状態であれば、各放電灯(
16)は点灯する。
The control circuit (22) of the high frequency voltage generation circuit (17) alternately switches the switching elements (8) and [9) to 0 at high frequency.
When N10FF is turned on and a high frequency voltage is generated, if the switch circuit [20] is closed, each discharge lamp (
16) lights up.

第2図はこの状態を示し、 (A) 、 (B)はそれ
ぞれスイッチング素“子(8) 、  (9)がON1
0 F Fする信号を示し、(C)はスイッチ回路(2
0)の動作を示し、(D)は限流コイル(14)により
スイッチ回路(20)には遅れ位相の電流が流れている
ことを示している。
Figure 2 shows this state, and (A) and (B) indicate that the switching elements (8) and (9) are ON1, respectively.
0 F F signal, (C) shows the switch circuit (2
0), and (D) shows that a current with a delayed phase flows through the switch circuit (20) due to the current limiting coil (14).

従って、スイッチ回路(20)を開くときは、同図(C
)  (D)のように遅延時間tを考慮している。
Therefore, when opening the switch circuit (20),
) The delay time t is taken into consideration as shown in (D).

第3図は複数の各放電灯(16)のうち少なくともいず
れかの1灯が異常状態となったときを示す図で9図中V
。1.:はスイッチング素子(9)のコレクターエミッ
タ間の電圧、工。は同コレクター電流。
Figure 3 is a diagram showing when at least one of the plurality of discharge lamps (16) is in an abnormal state.
. 1. : is the voltage between the collector and emitter of the switching element (9). is the same collector current.

■、は放電灯(16)の両端に印加されている電圧であ
る。
(2) is the voltage applied to both ends of the discharge lamp (16).

例えば、放電灯(16a)のフィラメントが消耗し、た
ち消えを起こした状態を仮定すると、正常時は第3図(
a) 、  (b) 、  (c)のようなそれぞれス
イッチング素子(9)のコレクターエミッタ間電圧Vc
や、同コレクター電流■。、印加電圧■、となっている
ものが、同図(d) 、 (e) 、 (f)のように
なる。
For example, if we assume that the filament of the discharge lamp (16a) is consumed and the lamp goes out immediately, the normal state is as shown in Figure 3 (
collector-emitter voltage Vc of each switching element (9) such as a), (b), and (c);
And the same collector current■. , and the applied voltage is as shown in (d), (e), and (f) in the same figure.

これは異常時には高周波電圧発生回路(17)からは放
電灯(16a)を点灯させるため同図(e)のような共
振状の大電流■。が流れ、放電灯[16a)には同図(
f)のような高電圧VLRが印加される。
This is because the high frequency voltage generating circuit (17) lights up the discharge lamp (16a) in the event of an abnormality, so a large resonance current (2) as shown in FIG. flows, and the discharge lamp [16a] has the same figure (
A high voltage VLR such as f) is applied.

この高電圧は抵抗(24a) 、 (25a)により分
圧され印加電圧■、として保護回路(23a)に入力さ
れ、基準電圧V。と比較される。
This high voltage is divided by resistors (24a) and (25a) and inputted to the protection circuit (23a) as applied voltage (2), which then becomes the reference voltage (V). compared to

この印加電圧VRが基準電圧■。を超えるときは保護回
路(23a)は指令信号Sを出力する。この指令信号S
は開閉制御回路(27a)に送られ、開閉制御回路(2
7a)ではこの信号を受は高周波電圧発生回路(17)
の制御回路(22)と同期し、所定時間遅延して位相を
調整し、スイッチ回路(20a)のパワーMO3FET
を開き、放電灯(16a)への高周波電力の供給を制限
する。
This applied voltage VR is the reference voltage ■. When it exceeds, the protection circuit (23a) outputs the command signal S. This command signal S
is sent to the opening/closing control circuit (27a), and
In 7a), this signal is received by the high frequency voltage generation circuit (17).
The power MO3FET of the switch circuit (20a) is synchronized with the control circuit (22) of
is opened to limit the supply of high-frequency power to the discharge lamp (16a).

なお、上記印加電圧VRが基準電圧■。を大幅に超える
ときは、上記順序に従いスイッチ回路(20a)のパワ
ーMO3FETを開放状態として、放電灯(16a)へ
の高周波電力の供給を停止し、消灯させることもできる
Note that the applied voltage VR is the reference voltage ■. When the discharge lamp (16a) is significantly exceeded, the power MO3FET of the switch circuit (20a) is opened in accordance with the above order, and the supply of high-frequency power to the discharge lamp (16a) can be stopped to turn it off.

以上のように、この実施例では高周波電圧発生回路とし
てインバータを用いたが、これに限定されず同期信号が
取り出せるものであればよい。
As described above, in this embodiment, an inverter is used as the high frequency voltage generating circuit, but the present invention is not limited to this, and any device that can extract a synchronizing signal may be used.

また、スイッチ回路としてパワーMO3FETが適して
いるが、他の手段9例えばバイポーラトランジスタと逆
並列ダイアートなとでもよい。
Further, although a power MO3FET is suitable as the switch circuit, other means 9 such as a bipolar transistor and an anti-parallel diart may be used.

[発明の効果] 以上のようにこの発明によれば、負荷である複数の放電
灯を並列に接続し高周波電圧を供給する高周波電圧発生
回路と、上記各放電灯と直列に接続されたそれぞれ複数
の結合コンデンサ、限流コイルおよびスイッチ回路と、
上記各放電灯と並列に接続された複数の共振コンデンサ
と。
[Effects of the Invention] As described above, according to the present invention, there is provided a high-frequency voltage generation circuit that connects a plurality of discharge lamps as loads in parallel and supplies a high-frequency voltage, and a plurality of high-frequency voltage generation circuits that connect a plurality of discharge lamps as loads in parallel and supply a high-frequency voltage to each discharge lamp. coupling capacitor, current limiting coil and switch circuit,
and a plurality of resonant capacitors connected in parallel with each of the above discharge lamps.

上記各放電灯の印加電圧を監視し、この電圧が所定値を
超えるときは異常指令を出す複数の保護回路と、この保
護回路の異常指令を受け、上記高周波電圧発生回路内の
制御信号と同期し、所定の時間遅延して上記各スイッチ
回路を開く複数の開閉制御回路とを備えたので、複数の
放電灯を共通の高周波電圧発生回路で点灯しながら、−
灯でも放電灯が異常になれば、これに対する電力の供給
を個別に制限することができる放電灯点灯装置が得られ
る効果がある。
Multiple protection circuits that monitor the voltage applied to each of the discharge lamps and issue an abnormality command when this voltage exceeds a predetermined value, and synchronize with the control signal in the high-frequency voltage generation circuit that receives the abnormality command from this protection circuit. The present invention includes a plurality of opening/closing control circuits that open each of the switch circuits after a predetermined time delay, so that -
This has the effect of providing a discharge lamp lighting device that can individually restrict the supply of power to a discharge lamp when the discharge lamp becomes abnormal.

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

第1図はこの発明の放電灯点灯装置の一実施例図におい
て、(1)は直流電源、(2)は抵抗。 (3)はコンデンサ、  (4) 、 (5) 、 (
6)はダイオード、(7)はトリガ素子、  (8) 
、 (9)はスイッチング素子、 (10)、 (11
)は抵抗、 (12)は駆動トランス、 (13)は結
合コンデンサ、 (14)は限流コイル。 (15)は共振コイル、  (16)は放電灯、 (1
7)は高周波電圧発生回路、 (18)は予熱トランス
、 (19)は予熱用スイッチ、  (20)はスイッ
チ回路、 (21)はダイ第−ド、、(22)は制御回
路、1例)は開閉制御回路。 (24)、 (25)は抵抗、 (26)は分圧器、(
N)は保護回路である。 なお1図中、同一符号は同一または相当部分を示す。
FIG. 1 is a diagram showing an embodiment of the discharge lamp lighting device of the present invention, in which (1) is a DC power supply and (2) is a resistor. (3) is a capacitor, (4), (5), (
6) is a diode, (7) is a trigger element, (8)
, (9) are switching elements, (10), (11
) is a resistor, (12) is a drive transformer, (13) is a coupling capacitor, and (14) is a current limiting coil. (15) is a resonant coil, (16) is a discharge lamp, (1
7) is a high frequency voltage generation circuit, (18) is a preheating transformer, (19) is a preheating switch, (20) is a switch circuit, (21) is a die code, and (22) is a control circuit. (1 example) is the opening/closing control circuit. (24), (25) are resistors, (26) are voltage dividers, (
N) is a protection circuit. In addition, in FIG. 1, the same reference numerals indicate the same or corresponding parts.

Claims (1)

【特許請求の範囲】 負荷である複数の放電灯を並列に接続し高周波電圧を供
給する高周波電圧発生回路と、 上記各放電灯と直列に接続されたそれぞれ複数の結合コ
ンデンサ、限流コイルおよびスイッチ回路と、 上記各放電灯と並列に接続された複数の共振コンデンサ
と、 上記各放電灯の印加電圧を監視し、この電圧が所定値を
超えるときは異常指令を出す複数の保護回路と、 この保護回路の異常指令を受け、上記高周波電圧発生回
路内の制御信号と同期し、所定の時間遅延して上記各ス
イッチ回路を開く複数の開閉制御回路とを備えたことを
特徴とする放電灯点灯装置。
[Scope of Claims] A high-frequency voltage generation circuit that connects a plurality of discharge lamps as loads in parallel and supplies a high-frequency voltage, and a plurality of coupling capacitors, current-limiting coils, and switches connected in series with each of the discharge lamps. a plurality of resonant capacitors connected in parallel with each of the discharge lamps, a plurality of protection circuits that monitor the voltage applied to each of the discharge lamps and issue an abnormality command when this voltage exceeds a predetermined value; A discharge lamp lighting device comprising: a plurality of opening/closing control circuits that receive an abnormality command from a protection circuit, synchronize with a control signal in the high-frequency voltage generation circuit, and open each of the switch circuits after a predetermined time delay. Device.
JP2102185A 1990-04-18 1990-04-18 Discharge lamp lighting device Expired - Lifetime JP2600433B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2102185A JP2600433B2 (en) 1990-04-18 1990-04-18 Discharge lamp lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2102185A JP2600433B2 (en) 1990-04-18 1990-04-18 Discharge lamp lighting device

Publications (2)

Publication Number Publication Date
JPH042098A true JPH042098A (en) 1992-01-07
JP2600433B2 JP2600433B2 (en) 1997-04-16

Family

ID=14320611

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2102185A Expired - Lifetime JP2600433B2 (en) 1990-04-18 1990-04-18 Discharge lamp lighting device

Country Status (1)

Country Link
JP (1) JP2600433B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008241876A (en) * 2007-03-26 2008-10-09 Phoenix Denki Kk Light source device and exposure apparatus using the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147740A (en) * 1984-12-20 1986-07-05 三洋電機株式会社 Power source circuit
JPS62199151A (en) * 1986-02-27 1987-09-02 Nec Corp Line assignment system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147740A (en) * 1984-12-20 1986-07-05 三洋電機株式会社 Power source circuit
JPS62199151A (en) * 1986-02-27 1987-09-02 Nec Corp Line assignment system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008241876A (en) * 2007-03-26 2008-10-09 Phoenix Denki Kk Light source device and exposure apparatus using the same

Also Published As

Publication number Publication date
JP2600433B2 (en) 1997-04-16

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