JPH05182774A - Start lighting circuit for discharge lamp - Google Patents

Start lighting circuit for discharge lamp

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Publication number
JPH05182774A
JPH05182774A JP33077891A JP33077891A JPH05182774A JP H05182774 A JPH05182774 A JP H05182774A JP 33077891 A JP33077891 A JP 33077891A JP 33077891 A JP33077891 A JP 33077891A JP H05182774 A JPH05182774 A JP H05182774A
Authority
JP
Japan
Prior art keywords
discharge
pulse
starting
temperature
lamp
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.)
Pending
Application number
JP33077891A
Other languages
Japanese (ja)
Inventor
Koichi Ishida
耕一 石田
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.)
SANTOKU GIKEN KK
Original Assignee
SANTOKU GIKEN KK
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 SANTOKU GIKEN KK filed Critical SANTOKU GIKEN KK
Priority to JP33077891A priority Critical patent/JPH05182774A/en
Publication of JPH05182774A publication Critical patent/JPH05182774A/en
Pending legal-status Critical Current

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  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

PURPOSE:To prevent a lamp from being damaged by automatically exciting starting high voltage pulses with the temperature of the discharge lamp detected. CONSTITUTION:When a lamp is lighted again immediately after the light is turned out after the lamp has been lighted for a long time, since the temperature of the lamp or a heat sink and the like is increased, the difference in temperature between each temperature sensor 8 and 10 and an environmental temperature sensor 7 is great, a suspension signal 4 is outputted in consequence from a temperature difference detection circuit 6 operated by an operational amplifier and the like, consequently, a starting high voltage pulse exciting circuit 3 is not excited, so that the lamp is not initially lighted either. After that, when there exists small temperature difference between each temperature sensor and the environmental sensor as temperature is lowered, an exciting signal 4 is outputted from the circuit 6. High voltage pulses are then applied to a discharge lamp 9 by the circuit 3 via a pulse transformer 2, consequently, initial discharge is started, and is transformed into normal discharge by a stabilizer 1. And simultaneously, discharge current is detected by a current detection circuit 5, so that the excitation of the circuit 3 is suspended. By this constitution, it is possible to prevent the discharge lamp from being damaged, fractured and 1owered in durability owing to the application of high voltage pulses at improper times.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、水銀灯・高圧ナトリュ
ム灯・メタルハライド灯などの放電灯を初期放電させる
放電灯の起動点灯回路に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp start-up lighting circuit for initially discharging a discharge lamp such as a mercury lamp, a high pressure sodium lamp, and a metal halide lamp.

【0002】[0002]

【従来の技術】従来、この種の起動点灯回路として通常
は銅鉄型リーケージトランス等により交流高圧で放電開
始させ、通電後は、放電電流によるリーケージトランス
のリアクテンスによる放電維持電圧まで電圧降下させて
いた。また、より高い放電開始電圧を必要とするナトリ
ュム灯などの場合には、直列に挿入したリアクタンス分
を管内バイメタル等の温度上昇により開閉させ、その際
発生するキックパルス(電源電圧より数倍〜数十倍高
い)により初期放電を開始させていた。
2. Description of the Related Art Conventionally, as a start-up lighting circuit of this type, a discharge is usually started at a high voltage of an alternating current by a copper-iron type leakage transformer or the like, and after energization, the voltage is lowered to a discharge maintaining voltage due to a leakage transformer's reactance due to a discharge current. It was Also, in the case of a sodium lamp that requires a higher discharge start voltage, the reactance component inserted in series is opened and closed by the temperature rise of the bimetal in the tube, and the kick pulse generated at that time (several times to several times the power supply voltage). The initial discharge was started by 10 times higher).

【0003】従来から用いられているこのような銅鉄型
電磁起動点灯回路は、大型で重量も重く、効率も低いも
のである。そこで、最近これらに代わって電子回路によ
り構成されている電子安定器が提唱されている。
Such a copper-iron type electromagnetic starting lighting circuit conventionally used is large in size, heavy in weight and low in efficiency. Therefore, recently, an electronic ballast including an electronic circuit has been proposed in place of these.

【0004】[0004]

【発明が解決しようとする課題】しかしながら、半導体
により構成されている電子安定器の場合についていえ
ば、発生が機械的でその電圧、タイミング等のまったく
制御のきかない高電圧による半導体への悪影響が問題に
なり、またバイメタル等の開閉のないさらに高い高電圧
を要求される放電管(HQIオスラム管、メタルハライ
ド管等)の場合、必要かつ充分な高電圧パルスをタイミ
ングよく加えなくてはならないという問題がある。
However, in the case of an electronic ballast composed of a semiconductor, the adverse effect on the semiconductor due to a high voltage whose generation is mechanical and whose voltage, timing, etc. are completely uncontrollable. In the case of a discharge tube (HQI Osram tube, metal halide tube, etc.) that requires a higher voltage without opening and closing of bimetal, etc., it is necessary to apply necessary and sufficient high voltage pulse in a timely manner. There is.

【0005】つまり、放電開始後直ちに高圧パルスを
停止したり、起動不能の時いたずらに高圧パルスを加
えたり、長時間点灯した後に消灯し、管内ガスが未だ
高温活性状態のとき誤って間をおかずにすぐ再起動をし
て、高圧パルスをかけたりすると、管寿命に著しく悪影
響を及ぼすことが知られているが、このようなときは、
高圧パルスを発生させないよう制御する必要がある。
In other words, the high-voltage pulse is stopped immediately after the start of discharge, the high-voltage pulse is added for mischief when it cannot be started, or the lamp is turned off after being lit for a long time. It is known that restarting immediately and applying a high-pressure pulse will have a bad effect on the life of the tube, but in such a case,
It is necessary to control so as not to generate a high voltage pulse.

【0006】よって本発明の目的は、上述の点に鑑み、
放電開始用高圧パルスの発生を放電管の状況を充分考
慮、掌握したうえ、まったく放電管または電子回路に悪
影響を与えないで正常点灯に移行することができる放電
灯の起動点灯回路を提供することにある。
Therefore, in view of the above points, an object of the present invention is to
To provide a starting and lighting circuit of a discharge lamp capable of shifting to normal lighting without giving any adverse effect to the discharge tube or electronic circuit, taking into account the situation of the discharge tube in consideration of generation of a high-voltage pulse for starting discharge. It is in.

【0007】[0007]

【課題を解決するための手段】かかる目的を達成するた
め、本発明は放電灯起動時の初期放電開始電圧を点灯後
の放電維持電圧より高く設定する起動点灯回路におい
て、前記放電灯に関連する発熱部分もしくは駆動回路の
発熱状態に応じて起動用高圧パルスを発生するパルス発
生手段と、前記起動用高圧パルスの発生後に前記放電灯
が継続的正常放電状態に達したこと、または、前記起動
用高圧パルスが所定パルス数発生したにも拘らず正常放
電に移行しないことを検知する放電検知手段と、前記放
電検知手段の出力に応答して、前記パルス発生手段の作
動を停止させる制御手段とを具備したものである。
In order to achieve the above object, the present invention relates to the discharge lamp in a starting lighting circuit for setting an initial discharge starting voltage at the time of starting the discharge lamp higher than a discharge sustaining voltage after lighting. Pulse generating means for generating a high voltage pulse for starting in accordance with a heat generation state of a heat generating portion or a drive circuit, and that the discharge lamp has reached a continuous normal discharge state after generation of the high voltage pulse for starting, or Discharge detecting means for detecting that the high-voltage pulse does not shift to normal discharge despite having generated a predetermined number of pulses, and control means for stopping the operation of the pulse generating means in response to the output of the discharge detecting means. It is equipped.

【0008】また、放電灯起動時の初期放電開始電圧を
点灯後の放電維持電圧より高く設定する起動点灯回路に
おいて、前記放電灯の起動点灯時に、それまで消灯して
いた継続時間の長さを記憶する消灯時間記憶手段と、前
記放電灯の起動点灯時の前に点灯していた継続時間を記
憶する点灯時間記憶手段と、前記消灯時間および前記点
灯時間に基づいて決定される特定時間後に、起動用高圧
パルスを発生するパルス発生手段と、前記起動用高圧パ
ルスの発生後に前記放電灯が継続的正常放電状態に達し
たこと、または、前記起動用高圧パルスが所定パルス放
電発生したにも拘らず正常放電に移行しないことを検知
する放電検知手段と、前記放電検知手段の出力に応答し
て、前記パルス発生手段の作動を停止させる制御手段と
を具備したものである。
Further, in the start-up lighting circuit for setting the initial discharge start-up voltage at the start of the discharge lamp higher than the discharge sustaining voltage after the start-up, the length of the duration of the discharge lamp that has been extinguished until the start-up is set. Extinguishing time storage means to store, lighting time storage means to store the duration that was lit before the startup lighting of the discharge lamp, after a specific time determined based on the extinction time and the lighting time, A pulse generating means for generating a high voltage pulse for starting, and that the discharge lamp has reached a continuous normal discharge state after the high voltage pulse for starting is generated, or the high voltage pulse for starting has generated a predetermined pulse discharge. The discharge detection means for detecting that the discharge does not shift to normal discharge, and the control means for stopping the operation of the pulse generation means in response to the output of the discharge detection means. That.

【0009】本発明の好適な実施例では、放電管に直列
に挿入された高圧パルス供給用トランスと、発停制御可
能な高圧パルス発振回路と、以下述べる(イ),(ロ)
のいずれかと(ハ)との組合わせによる高圧パルス発生
制御手段とを備えて構成されている。
In a preferred embodiment of the present invention, a transformer for high-voltage pulse supply inserted in series in a discharge tube, a high-voltage pulse oscillation circuit capable of controlling start / stop, and (a) and (b) will be described below.
And a high-voltage pulse generation control means that is a combination of (c) and (c).

【0010】(イ)放電管の電磁型安定器または電子安
定器または管自体等のいずれかの、ある程度以上熱容
量,熱抵抗のある部分に接触させた感熱素子(サーミス
ター,バリスター等)による温度計測手段と、雰囲気温
度の温度計測手段と、これら2つの計測温度を比較計算
する比較手段と、その差がある一定以下になった場合高
圧パルス発停信号出す手段とを有する。
(B) By a heat-sensitive element (thermistor, varistor, etc.) in contact with a portion having a heat capacity or thermal resistance of a certain degree, such as an electromagnetic ballast or an electronic ballast of the discharge tube or the tube itself. It has a temperature measuring means, a temperature measuring means for the ambient temperature, a comparing means for comparing and calculating these two measured temperatures, and a means for issuing a high-voltage pulse start / stop signal when the difference between them is below a certain level.

【0011】(ロ)直前の正常点灯時間および消灯時間
の記憶手段と、これらの時間差により今回の高圧パルス
発生開始時間を決定する手段と、その時間が到来したと
き高圧パルス発停信号出す手段とを有する。
(B) Means for storing the normal lighting time and extinguishing time immediately before, means for determining the high-voltage pulse generation start time of this time based on the time difference between these, and means for outputting a high-voltage pulse start / stop signal when the time comes Have.

【0012】(ハ)定常放電開始の検知と同時に高圧パ
ルスを停止する手段と、さらに高圧パルスが数パルス〜
数十パルス発生しても定常放電検知手段が定常放電移行
を検知しない場合、直ちに高圧パルス発振を停止する手
段を有する。
(C) A means for stopping the high-voltage pulse at the same time as the detection of the start of the steady discharge, and several high-voltage pulses
If the steady discharge detection means does not detect the shift to the steady discharge even if several tens of pulses are generated, it has means for immediately stopping the high voltage pulse oscillation.

【0013】[0013]

【作用】本発明にかかる起動点灯回路では、前回の長時
間点灯によって安定器または放電管が周囲の雰囲気温度
よりある一定以上高温の場合、つまり放電管が充分冷え
ていないことを管自体または間接的に回路の発熱部品で
温度検知し、放電管がまだ高圧パルスの受入状態でない
ことを温度により検知した場合には、有害な起動用高圧
発生パルスの出力を禁止することができる。そして、時
間が経過して発熱部品または放電管の温度が低下し周囲
の雰囲気温度とあまり差がなくなった場合、改めて高圧
パルスを発生させることができる。
In the start-up lighting circuit according to the present invention, when the ballast or the discharge tube is higher than the ambient atmospheric temperature by a certain level or more due to the previous long-time lighting, that is, the fact that the discharge tube is not sufficiently cooled, the tube itself or the indirect When the temperature of the heat-generating component of the circuit is detected and it is detected that the discharge tube is not yet in the high-voltage pulse receiving state, it is possible to prohibit the output of the harmful high-voltage pulse for start-up. Then, when the temperature of the heat-generating component or the discharge tube is lowered with the passage of time and there is not much difference from the ambient atmosphere temperature, a high voltage pulse can be generated again.

【0014】これとは別に、放電管の直前の点灯時間を
記憶し、消灯後の経過時間との比較において、即時に高
圧パルスを発生させるか、数分後に発生させるかを判別
し、設定時間後に起動を開始させることができる。
Separately from this, the lighting time immediately before the discharge tube is stored, and in comparison with the elapsed time after extinguishing, it is determined whether the high-voltage pulse is generated immediately or after a few minutes, and the set time is set. The activation can be started later.

【0015】さらに、起動用高圧パルスの印加により正
常放電開始を電流検知等で検知した場合、あるいは管の
不良により高圧パルスを数パルス〜数十パルス発生して
も正常放電に移行しない場合、高圧パルスの発生を停止
させて管に対する悪影響,高圧パルスによるノイズを防
ぐことができる。
Further, when normal discharge start is detected by current detection by applying a high voltage pulse for start-up, or when a high voltage pulse does not occur even if several to several tens of high voltage pulses are generated due to a defective tube, a high voltage is generated. The generation of pulses can be stopped to prevent adverse effects on the pipe and noise due to high-voltage pulses.

【0016】[0016]

【実施例】以下、本発明の実施例を図1〜図4を参照し
て説明する。
Embodiments of the present invention will be described below with reference to FIGS.

【0017】図1は、本発明にかかる起動点灯回路の一
実施例を示す回路図である。本図において、商用交流電
源に接続された電磁型安定器(または電子安定器)1お
よびパルストランス2を介して放電管9に電圧が印加さ
れる。この場合、起動用高圧パルス発振回路3は放電電
流検知回路5から出力された信号と温度差検知回路6か
らの信号4とにより高圧パルスの発振/停止を行う。
FIG. 1 is a circuit diagram showing an embodiment of a start-up lighting circuit according to the present invention. In the figure, a voltage is applied to the discharge tube 9 via an electromagnetic ballast (or electronic ballast) 1 and a pulse transformer 2 which are connected to a commercial AC power supply. In this case, the starting high-voltage pulse oscillation circuit 3 oscillates / stops the high-voltage pulse based on the signal output from the discharge current detection circuit 5 and the signal 4 from the temperature difference detection circuit 6.

【0018】温度差検知回路6はサーミスター等による
温度センサーとして雰囲気温度センサー7と、放電管温
度センサー8または安定器1のトランス(電磁型の場
合)もしくは半導体のヒートシンク(電子安定器の場
合)に装着した温度センサー10との温度差が一定以下
の時のみ発振信号4を出す。
The temperature difference detection circuit 6 is an ambient temperature sensor 7 as a temperature sensor such as a thermistor, a discharge tube temperature sensor 8 or a transformer of the ballast 1 (in the case of an electromagnetic type) or a semiconductor heat sink (in the case of an electronic ballast). The oscillation signal 4 is output only when the temperature difference from the temperature sensor 10 attached to the device is less than a certain value.

【0019】起動用高圧パルス発振回路3は、数十パル
ス(設定)のパルスを発生しても初期放電を開始しない
場合は自動的にパルス発振を停止する手段(例えばプロ
グラマブルカウンター)を有する。
The high-voltage pulse oscillation circuit 3 for start-up has means (for example, a programmable counter) that automatically stops pulse oscillation when initial discharge is not started even when several tens of pulses (setting) are generated.

【0020】いま仮に、長時間点灯後消灯し、直ちに再
点灯したとする。この長時間の点灯のため、管またはヒ
ートシンク等の温度がかなり上昇していることから、温
度センサー8もしくは10と、雰囲気温度センサー7と
の温度差が大きいので、オペアンプ等による差動増幅
器,コンパレーターよりなる温度差検知回路6が停止信
号4を出すため、起動用高圧パルス発振回路3は発振せ
ず初期点灯は行われない。その後時間が経過し(5分か
ら6分)、安定器および管の温度が低下して雰囲気温度
(気温)との差が少なくなると、温度差検知回路6が発
振信号4を出す。
It is assumed that the lamp is turned on for a long time, turned off, and then turned on again immediately. Due to this long-time lighting, the temperature of the tube, the heat sink, or the like has risen considerably. Therefore, the temperature difference between the temperature sensor 8 or 10 and the ambient temperature sensor 7 is large. Since the temperature difference detection circuit 6 composed of the oscillator outputs the stop signal 4, the starting high-voltage pulse oscillation circuit 3 does not oscillate and the initial lighting is not performed. After that, when the time elapses (5 to 6 minutes) and the temperature of the ballast and the tube decreases and the difference from the ambient temperature (air temperature) decreases, the temperature difference detection circuit 6 outputs the oscillation signal 4.

【0021】すると起動用高圧パルス発振回路3はパル
ストランス2を介して放電管9に起動に充分な高圧パル
スを印加し、初期放電が開始する。そして安定器1によ
る通常放電維持電圧による通常放電に移行する。これと
同時に通常放電電流を電流検知回路5より検知し、高圧
パルス発振回路3の発振を直ちに停止させる。
Then, the starting high-voltage pulse oscillation circuit 3 applies a high-voltage pulse sufficient for starting to the discharge tube 9 through the pulse transformer 2 to start the initial discharge. Then, the ballast 1 shifts to normal discharge by the normal discharge sustaining voltage. At the same time, the normal discharge current is detected by the current detection circuit 5, and the oscillation of the high voltage pulse oscillation circuit 3 is immediately stopped.

【0022】他方、長時間消灯後の場合は全ての部分が
冷えているので、各温度センサー間7と8(または7と
10)の温度差はほとんど生じない。そのため、この場
合には点灯開始のためのメインスイッチ投入と同時に温
度差検知回路6から発振信号4が起動用高圧パルス発振
回路3に送られ、高圧パルスの印加による初期放電が開
始し、上記同様平常点灯に移行する。このように、放電
管の状況に見合ったタイミングで初期高圧パルスを発生
することができる。
On the other hand, after the lamp has been turned off for a long time, all the parts are cold, so that the temperature difference between the temperature sensors 7 and 8 (or 7 and 10) hardly occurs. Therefore, in this case, the oscillation signal 4 is sent from the temperature difference detection circuit 6 to the startup high-voltage pulse oscillation circuit 3 at the same time when the main switch for starting lighting is turned on, and the initial discharge due to the application of the high-voltage pulse is started. Transition to normal lighting. In this way, the initial high voltage pulse can be generated at a timing suitable for the condition of the discharge tube.

【0023】図2は、本発明の第2の実施例を示す。本
実施例の場合も、高圧パルスの発振,放電管へのパルス
印加については上記実施例と同じであるが、高圧パルス
タイミング回路11により図1と同様の動作および効果
を生じさせている。
FIG. 2 shows a second embodiment of the present invention. In the case of the present embodiment as well, the oscillation of the high-voltage pulse and the pulse application to the discharge tube are the same as those in the above-mentioned embodiment, but the high-voltage pulse timing circuit 11 produces the same operation and effect as in FIG.

【0024】図3は、図2に示した高圧パルスタイミン
グ回路11の一例である。本図に示すとおり、安定器1
より直流電圧(+)(−)を導入する電源ライン13,
14と、直流リレー15と、そのリレー接点17,21
と、ダイオード16,25,26と、チャージ用高抵抗
18と、大容量コンデンサー19と、ディスチャージ用
高抵抗20と、コンパレーター22と、基準電圧(V
REF )源23とにより、高圧パルスタイミング回路11
は構成されている。
FIG. 3 shows an example of the high voltage pulse timing circuit 11 shown in FIG. As shown in this figure, ballast 1
A power supply line 13 for introducing a direct current voltage (+) (-),
14, DC relay 15, and its relay contacts 17 and 21
, Diodes 16, 25, 26, high resistance 18 for charging, large-capacity capacitor 19, high resistance 20 for discharging, comparator 22, reference voltage (V
By the REF) source 23, high-voltage pulse timing circuit 11
Is configured.

【0025】次に、図3の動作を説明する。図2に示し
た安定器1に商用交流電源が投入され、電源ライン1
3,14を介して直流が回路に供給される。この時コン
デンサー19は未だチャージされておらず、基準電圧V
REF より低いのでコンパレーター22よりハイレベルの
出力が出て、高圧パルス発振信号12が出力される。こ
れにより初期放電が開始し、通常放電に移行するのは図
1と同じであるが、これと同時にコンパレーター出力に
よりリレー15がONし、リレー接点17は閉じ、リレ
ー接点21は開く。そこで、ダイオード16およびチャ
ージ用高抵抗18を介してゆっくりコンデンサー19に
チャージがはじまる。
Next, the operation of FIG. 3 will be described. The commercial AC power supply is turned on to the ballast 1 shown in FIG.
Direct current is supplied to the circuit via 3, 14. At this time, the capacitor 19 is not yet charged, and the reference voltage V
Since it is lower than REF , a high level output is output from the comparator 22, and the high voltage pulse oscillation signal 12 is output. As a result, the initial discharge starts and the normal discharge shifts to the same as in FIG. 1, but at the same time, the relay output turns on the relay 15, the relay contact 17 closes, and the relay contact 21 opens. Then, the charge starts slowly in the capacitor 19 via the diode 16 and the high resistance 18 for charging.

【0026】コンデンサー19の電圧が上昇していき、
基準電圧VREF を越えると、コンパレーター22は反転
しハイレベル出力は0になるが、リレー15は接点17
により自己保持されているのでチャージはさらに進行
し、電源電圧までゆっくり上昇し続ける。
The voltage of the condenser 19 rises,
When the voltage exceeds the reference voltage V REF , the comparator 22 inverts and the high level output becomes 0, but the relay 15 contacts the contact 17
Since it is self-held by, the charge proceeds further and continues to rise slowly to the power supply voltage.

【0027】次に商用電源をOFFにすると、リレー1
5がOFFすることにより、接点17は開き、接点21
は閉じてディスチャージ抵抗20がつながり、コンデン
サー19を放電し始め、充電電圧がゆっくり低下する。
この時のコンデンサー19の電圧を示したのが図4であ
る。
Next, when the commercial power supply is turned off, the relay 1
When the switch 5 is turned off, the contact 17 opens and the contact 21
Is closed, the discharge resistor 20 is connected, the capacitor 19 starts discharging, and the charging voltage slowly drops.
FIG. 4 shows the voltage of the capacitor 19 at this time.

【0028】次に、長時間点灯後消灯し、直ちに再点灯
した場合について説明する。この場合、コンデンサー1
9の電圧はまだまだコンパレーター22の基準電圧V
REF より高く、コンパレーター12からはハイレベル出
力(すなわち、高圧パルス発振信号,リレー動作電圧)
は得られない。ところが時間の経過と共に、ディスチャ
ージ抵抗20の放電により充電電圧が基準電圧VREF
り下がると、コンパレーター22の出力は反転し、ハイ
レベルの信号が出力されて起動放電が開始する。従っ
て、リレー15がONし、再びコンデンサー20の充電
が始まる。この場合、前回の点灯時間および消灯してか
らの時間が電源OFFの時でもコンデンサー19の充電
電圧の形態で記憶されているため、充放電時間の正確な
比例関係により、パルス発生タイミング回路11として
正確に作用する。
Next, a case where the lamp is turned off for a long time, turned off, and then immediately turned on again will be described. In this case, condenser 1
The voltage of 9 is still the reference voltage V of the comparator 22.
Higher than REF and high level output from the comparator 12 (ie high voltage pulse oscillation signal, relay operating voltage)
Can't get However, when the charge voltage drops below the reference voltage V REF due to discharge of the discharge resistor 20 with the passage of time, the output of the comparator 22 is inverted, a high level signal is output, and start discharge is started. Therefore, the relay 15 is turned on, and the charging of the capacitor 20 starts again. In this case, since the previous lighting time and the time after the light is turned off are stored in the form of the charging voltage of the capacitor 19 even when the power is off, the pulse generation timing circuit 11 has the accurate proportional relation of the charging / discharging time. Works exactly.

【0029】[0029]

【発明の効果】以上説明をしたとおり本発明によれば、
管が放電開始可能な適正な時期に自動的に起動用高圧パ
ルスを発振させる構成としてあるので、不適性な時期に
高圧パルスを加えることによる管の損傷,破損,寿命低
下を防ぐことができる。また放電管不良などにより初期
点灯しない場合、起動用高圧パルス発振は数十パルス等
で停止する手段を具えているので、ノイズの防止になる
ほか、短時間定格(数十マイクロ秒等)の発振回路を備
えればよいので、小型かつ簡易化が図れる。
As described above, according to the present invention,
Since the high-voltage pulse for starting is automatically oscillated at an appropriate time when the tube can start discharging, it is possible to prevent the tube from being damaged, broken, and shortened in life due to the high-voltage pulse being applied at an inappropriate time. When the initial lighting does not start due to a defective discharge tube, the starting high-voltage pulse oscillation has a means to stop at several tens of pulses, so it prevents noise and oscillates for a short time rating (several tens of microseconds). Since it suffices to include a circuit, it can be made small and simple.

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

【図1】本発明の第1の実施例を示す回路図である。FIG. 1 is a circuit diagram showing a first embodiment of the present invention.

【図2】本発明の第2の実施例を示す回路図である。FIG. 2 is a circuit diagram showing a second embodiment of the present invention.

【図3】図2に示した高圧パルスタイミング回路11の
詳細な構成を示す図である。
3 is a diagram showing a detailed configuration of a high voltage pulse timing circuit 11 shown in FIG.

【図4】図3の動作を説明するための波形図である。FIG. 4 is a waveform diagram for explaining the operation of FIG.

【符号の説明】[Explanation of symbols]

1 安定器(電磁型,または電子型) 2 パルストランス 3 起動用高圧パルス発振回路 4 発振/停止信号 5 放電電流検知回路 6 温度差検知回路 7 雰囲気温度センサー 8 放電管温度センサー 9 放電管 10 安定器用温度センサー 11 高圧パルスタイミング回路 12 高圧パルス発振/停止信号 13,14 電源ライン 15 直流リレー 16 ダイオード 17 リレー接点(ノーマルオープン) 18 チャージ用高抵抗 19 大容量コンデンサー 20 ディスチャージ用高抵抗 21 リレー接点(ノーマルクローズ) 22 コンパレーター 23 基準電圧源 1 ballast (electromagnetic type or electronic type) 2 pulse transformer 3 high-voltage pulse oscillation circuit for startup 4 oscillation / stop signal 5 discharge current detection circuit 6 temperature difference detection circuit 7 atmosphere temperature sensor 8 discharge tube temperature sensor 9 discharge tube 10 stable Temperature sensor for appliances 11 High-voltage pulse timing circuit 12 High-voltage pulse oscillation / stop signal 13,14 Power line 15 DC relay 16 Diode 17 Relay contact (normally open) 18 High resistance for charging 19 Large capacity capacitor 20 High resistance for discharging 21 Relay contact ( Normally closed) 22 Comparator 23 Reference voltage source

Claims (5)

【特許請求の範囲】[Claims] 【請求項1】 放電灯起動時の初期放電開始電圧を点灯
後の放電維持電圧より高く設定する起動点灯回路におい
て、 前記放電灯に関連する発熱部分もしくは駆動回路の発熱
状態に応じて起動用高圧パルスを発生するパルス発生手
段と、 前記起動用高圧パルスの発生後に前記放電灯が継続的正
常放電状態に達したこと、または、前記起動用高圧パル
スが所定パルス数発生したにも拘らず正常放電に移行し
ないことを検知する放電検知手段と、 前記放電検知手段の出力に応答して、前記パルス発生手
段の作動を停止させる制御手段とを具備したことを特徴
とする放電灯の起動点灯回路。
1. A starting lighting circuit for setting an initial discharge starting voltage at the time of starting a discharge lamp to be higher than a discharge sustaining voltage after lighting, in which a high voltage for starting is set according to a heat generating portion related to the discharge lamp or a heat generating state of a driving circuit. A pulse generating means for generating a pulse, that the discharge lamp has reached a continuous normal discharge state after the generation of the starting high voltage pulse, or a normal discharge despite the occurrence of a predetermined number of the starting high voltage pulse 1. A discharge lamp start-up lighting circuit comprising: a discharge detection unit that detects that the discharge detection unit does not shift to the above; and a control unit that stops the operation of the pulse generation unit in response to the output of the discharge detection unit.
【請求項2】 請求項1において、前記パルス発生手段
は、前記放電管の駆動回路もしくは発熱部の温度を検知
して、雰囲気温度もしくは始動時温度に近いときのみ、
高圧パルスを発生することを特徴とする放電灯の起動点
灯回路。
2. The pulse generating means according to claim 1, detecting the temperature of the drive circuit of the discharge tube or the heat generating portion, and only when the temperature is close to the ambient temperature or the starting temperature.
A start-up lighting circuit for a discharge lamp, which generates a high-voltage pulse.
【請求項3】 請求項2において、前記パルス発生手段
は、前記放電管の駆動回路もしくは発熱部の温度が適温
近くまで下ったことを検知して、高圧パルスを自動的に
再発生することを特徴とする放電灯の起動点灯回路。
3. The pulse generating means according to claim 2, wherein the high-voltage pulse is automatically regenerated by detecting that the temperature of the drive circuit of the discharge tube or the heat generating portion has dropped to a temperature close to an appropriate temperature. Characteristic discharge lamp start-up lighting circuit.
【請求項4】 放電灯起動時の初期放電開始電圧を点灯
後の放電維持電圧より高く設定する起動点灯回路におい
て、 前記放電灯の起動点灯時に、それまで消灯していた継続
時間の長さを記憶する消灯時間記憶手段と、 前記放電灯の起動点灯時の前に点灯していた継続時間を
記憶する点灯時間記憶手段と、 前記消灯時間および前記点灯時間に基づいて決定される
特定時間後に、起動用高圧パルスを発生するパルス発生
手段と、 前記起動用高圧パルスの発生後に前記放電灯が継続的正
常放電状態に達したこと、または、前記起動用高圧パル
スが所定パルス放電発生したにも拘らず正常放電に移行
しないことを検知する放電検知手段と、 前記放電検知手段の出力に応答して、前記パルス発生手
段の作動を停止させる制御手段とを具備したことを特徴
とする放電灯の起動点灯回路。
4. A start-up lighting circuit for setting an initial discharge start-up voltage at the start of a discharge lamp higher than a discharge sustaining voltage after the start-up, in which the duration of the discharge lamp being turned off until the start-up is set. Extinguishing time storage means to store, lighting time storage means to store the duration that was lighted before the start-up lighting of the discharge lamp, after a specific time determined based on the off time and the lighting time, A pulse generating means for generating a high voltage for starting, and that the discharge lamp has reached a continuous normal discharge state after generation of the high voltage for starting, or the high voltage for starting has generated a predetermined pulse discharge. And discharge control means for detecting that the discharge does not shift to normal discharge, and control means for stopping the operation of the pulse generation means in response to the output of the discharge detection means. Starting lighting circuit of a discharge lamp to be.
【請求項5】 請求項4において、前記パルス発生手段
は、前記特定時間として0秒ないし約6分のいずれかを
選択することを特徴とする放電灯の起動点灯回路。
5. The start-up lighting circuit of a discharge lamp according to claim 4, wherein the pulse generating means selects any one of 0 seconds to about 6 minutes as the specific time.
JP33077891A 1991-12-13 1991-12-13 Start lighting circuit for discharge lamp Pending JPH05182774A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33077891A JPH05182774A (en) 1991-12-13 1991-12-13 Start lighting circuit for discharge lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33077891A JPH05182774A (en) 1991-12-13 1991-12-13 Start lighting circuit for discharge lamp

Publications (1)

Publication Number Publication Date
JPH05182774A true JPH05182774A (en) 1993-07-23

Family

ID=18236441

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33077891A Pending JPH05182774A (en) 1991-12-13 1991-12-13 Start lighting circuit for discharge lamp

Country Status (1)

Country Link
JP (1) JPH05182774A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003000540A (en) * 2001-06-19 2003-01-07 Pentax Corp Processor of electronic endoscopic apparatus for controlling lamp lighting and light source device for endoscope
JP2004055538A (en) * 2002-05-31 2004-02-19 Monolithic Power Systems Inc Method for starting discharge lamp using initial pulse of high energy

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003000540A (en) * 2001-06-19 2003-01-07 Pentax Corp Processor of electronic endoscopic apparatus for controlling lamp lighting and light source device for endoscope
JP2004055538A (en) * 2002-05-31 2004-02-19 Monolithic Power Systems Inc Method for starting discharge lamp using initial pulse of high energy

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