JP4513152B2

JP4513152B2 - Discharge lamp lighting device

Info

Publication number: JP4513152B2
Application number: JP2000017132A
Authority: JP
Inventors: 潤熊谷; 裕康江里口; 浩史野呂
Original assignee: Panasonic Corp; Matsushita Electric Works Ltd
Current assignee: Panasonic Corp; Panasonic Electric Works Co Ltd
Priority date: 2000-01-26
Filing date: 2000-01-26
Publication date: 2010-07-28
Anticipated expiration: 2020-01-26
Also published as: JP2001210485A

Description

【０００１】
【発明の属する技術分野】
本発明はランプ特性の異なる複数種の放電灯を点灯することができる放電灯点灯装置に関するものである。
【０００２】
【従来の技術】
放電灯を点灯させる点灯装置としては従来銅鉄安定器が主流であった。しかし、近年安定器の軽量化・小型化・高機能化を目的として多くの電子部品を用いた電子バラストが主流となりつつある。この電子バラストについて以下簡単に説明する。
【０００３】
図２に従来の電子バラストのブロック図を示す。交流電源１に整流回路を含む直流電源回路部２が接続され、その出力端に放電灯への供給電力を調整・制御できるインバータ回路部３が接続され、さらにその出力端に放電灯４が接続されている。
【０００４】
このような従来の点灯装置では、ランプ特性の異なる放電灯を点灯する場合、点灯しようとする放電灯に適合した点灯装置を用いる必要があった。つまり、特性の異なる各々の放電灯に対して、専用の点灯装置を設けなければならず、開発費用・期間等の面での投資が多大であった。これより点灯装置は、複数種の放電灯を点灯することができる性能が望まれることが分かる。
【０００５】
【発明が解決しようとする課題】
本発明は、上述のような点に鑑みてなされたものであり、その目的とするところは、定格電力の異なる複数種のランプ各々に適切な電力を供給して点灯することができる放電灯点灯装置を提供することにある。
【０００６】
【課題を解決するための手段】
本発明によれば、上記の課題を解決するために、限流要素を介して放電灯に接続される点灯回路部と、ランプ電圧を実質的に検出する第１の検出手段と、ランプ電力を実質的に検出する第２の検出手段と、第２の検出手段の出力を受けて装着している放電灯の定格ランプ電力を判別する判別手段と、点灯回路部または限流要素の少なくとも一方を制御する制御手段とから構成され、定格ランプ電圧が略等しく、定格ランプ電力が異なる複数種の放電灯群のうちの少なくとも１本の放電灯を装着されて、該放電灯を安定に点灯する放電灯点灯装置において、放電灯始動時から所定期間は、第１の検出手段の出力が定格ランプ電圧に略等しい略一定の電圧となるように、前記制御手段が点灯回路部または限流要素の少なくとも一方を制御し、該所定期間において前記判別手段により放電灯の定格ランプ電力を判別し、前記所定期間の経過後は、第２の検出手段の出力が判別手段により判別された放電灯の定格ランプ電力と略等しくなるように、前記制御手段が点灯回路部または限流要素の少なくとも一方を制御することを特徴とするものである。ここで、限流要素の制御としては放電灯と直列に接続されるインピーダンス素子のインピーダンスを可変とするような手段を用いることができる。また、点灯回路部の制御としては、チョッパ回路やインバータ回路のスイッチング素子の周波数またはオン時間幅を可変とする手段を用いることができる。
【０００７】
【発明の実施の形態】
（実施形態１）
図１に第１の実施形態を示す。図１の回路は、交流電源１と、整流平滑回路等を含む直流電源回路部２と、点灯回路部５、制御回路部６からなるインバータ回路部３と、放電灯４からなる。制御回路部６は、放電灯４の安定点灯時に放電灯４に印加される両端電圧Ｖｌａが一定の電圧Ｖｓｔとなるように、点灯回路部５の出力を制御する。
【０００８】
以下、この回路の動作を説明する。図３は時間経過によるランプ電圧Ｖｌａの変化を示したものである。放電灯４は始動から時間Ｔｒ経過後に、安定点灯状態となり、ランプ電圧Ｖｓｔにて安定点灯する。ここで、Ｖｓｔは制御回路部６により制御されて放電灯４に印加される電圧である。
【０００９】
次に、放電灯４の仕様説明をする。放電灯４としては、定格ランプ電圧が略等しく、定格ランプ電力の異なる多種のランプ中のいずれかひとつを挿入する。例えば、表１のように、定格ランプ電圧Ｖｓｔ＝９０Ｖで点灯する３つのランプＡ、Ｂ、Ｃは、各々の定格ランプ電力が３９Ｗ、７４Ｗ、１００Ｗと異なるものである。
【００１０】
【表１】

図４は、図３のランプ始動から時間Ｔｒ経過後のランプ安定点灯時の出力を説明するグラフである。ランプ電圧がＶｓｔに安定すると、放電灯４へ供給される電力はランプ個々の等価抵抗値Ｒ（８１Ω、１１０Ω、２１０Ω）により、ランプＡを挿入した場合３９Ｗ、ランプＢを挿入した場合７４Ｗ、ランプＣを挿入した場合１００Ｗのランプ電力がそれぞれ印加される。
【００１１】
以上のように、本点灯装置はランプ安定点灯時に所定の出力電圧にて放電灯を点灯させることにより、自動的にその放電灯に適した電力にて点灯させるようにしたので、一つの放電灯点灯装置で、多種の放電灯を点灯することができる。
【００１２】
（実施形態２）
図５に第２の実施形態を示す。図５は、交流電源１と、チョッパー回路からなる直流電源回路部２と、点灯回路部５、制御回路部６からなるインバータ回路部３と、放電灯４と、ランプ電流を検出する回路ＤＥＴと、ランプ始動から安定点灯後のある時間Ｔｓｔを測るタイマー回路ＴＭＲと、どの定格電力の放電灯が装着されているかを判別する判別回路ＤＳＴからなる。制御回路部６は、放電灯４の安定点灯時に、放電灯４に印加される両端電圧Ｖｌａが一定の電圧Ｖｓｔとなるように、点灯回路部５の出力を制御する。
【００１３】
以下、回路動作について、実施形態１と異なる部分を説明する。ランプ電流検出回路ＤＥＴは、ランプ短絡電流を検知して、放電灯の始動を検出すると、タイマー回路ＴＭＲヘランプ始動を知らせる信号を送る。タイマー回路ＴＭＲはこの信号を受けて、放電灯が確実に点灯状態に達する時間Ｔｓｔ（図３参照）をカウントする。この時間Ｔｓｔが経過した後、タイマー回路ＴＭＲがランプ判別回路ＤＳＴに安定点灯状態であることを知らせる信号を送る。これを受けて判別回路ＤＳＴは、ランプ電流検出回路ＤＥＴで検出している電流を確認して、どの定格電力の放電灯が挿入されているかを判別し、判別された放電灯に相当する電流が流れるように制御をかける。このとき、図６に示すように、ランプ種別ごとに設定された最小値Ｍｉｎと最大値Ｍａｘの間の電流となるように制御を行うものである。また、先の説明では、ランプ電流検出により、ランプ種別を判別したが、ランプ電力検出に置き換えることも可能である。
【００１４】
以上のように、本点灯装置はランプ安定点灯時に所定の出力電圧にて放電灯を点灯させ、自動的にその放電灯に適した出力にて点灯させるようにしたので、一つの放電灯点灯装置で、多種の放電灯を点灯することができる。
【００１５】
（実施形態３）
図７に第３の実施形態を示す。図７は、交流電源１と、整流平滑回路等を含む直流電源回路部２と、点灯回路部５、制御回路部６からなるインバータ回路部３と、放電灯４と、ランプ電流を検出する回路ＤＥＴと、ランプ始動から安定点灯後のある時間Ｔｓｔを測るタイマー回路ＴＭＲと、入力電力を検出する回路Ｍと、どの定格電力の放電灯が装着されているかを判別する判別回路ＤＳＴからなる。制御回路部６は、放電灯４の安定点灯時に放電灯４に印加される両端電圧Ｖｌａが一定の電圧Ｖｓｔとなるように、点灯回路部５の出力を制御する。
【００１６】
以下、回路動作について、実施形態１と異なる部分を説明する。ランプ電流検出回路ＤＥＴは、ランプ短絡電流を検知して、ランプの始動を検出すると、タイマー回路ＴＭＲヘランプ始動を知らせる信号を送る。タイマー回路ＴＭＲはこの信号を受けて、放電灯が確実に点灯状態に達する時間Ｔｓｔ（図３参照）をカウントする。この時間Ｔｓｔが経過した後、タイマー回路ＴＭＲがランプ判別回路ＤＳＴに安定点灯状態であることを知らせる信号を送る。これを受けてランプ判別回路ＤＳＴは、入力電力検出回路Ｍにより検出された入力電圧と入力電流を演算した入力電力から、どの定格電力種の放電灯が挿入されているかを判別する。
【００１７】
制御回路部６は、その判別結果を受けて、ランプ電圧Ｖｌａを一定とする定Ｖｌａ制御を解除し、判別されたランプ電力種に応じた定電力制御ヘと切り換える。つまり、ランプＡ（表１）が挿入されている場合には略３９Ｗの出力のＲの範囲（図８）、ランプＢ（表１）が挿入されている場合には略７４Ｗの出力のＱの範囲（図８）、ランプＣ（表１）が挿入されている場合には略１００Ｗの出力のＰの範囲（図８）が出力されるように制御する。
【００１８】
なお、先の説明では、入力電力検出によりランプ種別を判別したが、入力電流、ランプ等価抵抗値、さらには放電灯が安定点灯状態に達するまでの立上り時間の差等を検出することによっても同様にランプ種別を判別することができる。
【００１９】
以上のように、本点灯装置はランプ安定点灯時に所定の出力電圧にて放電灯を点灯させ、自動的にその放電灯に適した出力にて点灯させるようにしたので、一つの放電灯点灯装置で、多種の放電灯を点灯することができる。
【００２０】
（実施形態４）
図９に第４の実施形態を示す。本実施形態は実施形態２、３と同様に挿入されている放電灯の電力種を判別するが、判別するタイミングとして、ランプ安定前の始動段階を使用する点を特徴とするものである。表１のランプＡ、Ｂ、Ｃは、それぞれランプ安定時の一定電圧Ｖｓｔに達するまでの時間に差が生ずる。図９のように、ランプ安定前の始動段階において、同じ間隔の時間ｔ１からｔ２までのランプ電圧上昇値を測定すると、ｄＶＡ／ｄｔ、ｄＶＢ／ｄｔ、ｄＶＣ／ｄｔとランプ種別ごとに異なってくる。この差より、どの定格電力種のランプが挿入されているのか判別することができる。
【００２１】
また、上記立上り時間の差はランプ電圧に限らず、ランプ電力、ランプ電流、入力電力、入力電流についても同様の判別をすることができる。
【００２２】
以上のように、本点灯装置はランプ電力種の判別結果をもとにランプ安定点灯後に、自動的にその放電灯に適した出力にて放電灯を点灯させるようにしたので、一つの放電灯点灯装置で、多種の放電灯を点灯することができる。
【００２３】
（実施形態５）
図１０に第５の実施形態を示す。本実施形態は、実施形態２〜４の入出力電気特性以外の方法で、挿入されている放電灯の電力種を判別する手段について示す。図１０に示す温度センサ２３は、ランプ温度を測定する手段である。表１記載のランプＡ、Ｂ、Ｃは、ランプ定格電力３９Ｗ、７４Ｗ、１００Ｗの差がランプ温度の差としても現れる。これを利用して、ランプ点灯時の温度を測定することによりランプ電力の種別を判別することが可能である。
【００２４】
（実施形態６）
図１１に第６の実施形態を示す。本実施形態は、実施形態２〜４の入出力電気特性以外の方法で、挿入されている放電灯の電力種を判別する手段について示す。図１１に示す光センサ２４は、ランプの発光量を測定する手段である。表１記載のランプＡ、Ｂ、Ｃは、ランプ定格電力３９Ｗ、７４Ｗ、１００Ｗの差が光量の差としても現れる。これを利用して、ランプ始動時又は点灯時の発光量を測定することによりランプ電力の種別を判別することが可能である。この光センサは、赤外線・紫外線センサ等に置き換えて使用することもできる。
【００２５】
（実施形態７）
図１２に第７の実施形態を示す。本実施形態は、実施形態２〜６の放電灯点灯装置にメモリー機能ＭＥＭを付けたものである。このメモリー機能に、ランプ初始動時におけるランプ電力種の判別結果を記憶しておくことにより、放電灯が点灯中に立ち消え等を起こして再始動するときには、再始動の立上りを検出して、メモリー機能から初始動時の判別結果を判別回路ＤＳＴへフィードバックすることにより、自動的に挿入されている放電灯に適した出力にて点灯させることができるので、一つの放電灯点灯装置で、多種の放電灯を点灯することができ、判別に要する時間も短縮できる。
【００２６】
（実施形態８）
図１３に第８の実施形態を示す。本実施形態は、実施形態１〜７で述べた点灯装置に適合可能な定格ランプ電圧が略等しく、定格ランプ電力の異なる放電灯について、それらランプの口金が同一形状で、且つ、ランプの光中心距離Ｌが同一なものを用いるものである。表１では、その一例として、口金にいわゆるＥベースタイプの口金を用いたランプの例をあげている。さらには、Ｅベースの中でも口金サイズをＥ２６等、１つのサイズに統一する。本実施形態により、灯具を替えずに、点灯させたいランプを自由に変更し、所望の光出力を得ることができる。
【００２７】
（実施形態９）
図１４に第９の実施形態を示す。本実施形態では、交流電源と、整流平滑回路等を含む直流電源回路部に代えて、電池１を電源として用いている。また、放電灯４の点灯前の無負荷時において、ランプ両端に高電圧を印加するイグナイタ回路ＩＧＮを設けている。このイグナイタ回路ＩＧＮは無負荷時にパルス的な高電圧を発生して、放電灯４を絶縁破壊させる装置である。ランプ絶縁破壊後のランプ短絡状態による急峻な大電流は、電流抑制回路７にて抑制する。制御回路部６は、無負荷時には出力電圧をＶｓｔ以上の電圧Ｖｎｌ（図３参照）にして放電灯４に供給するエネルギーを増やして始動性を高め、放電灯４の安定点灯時には放電灯４に印加される両端電圧Ｖｌａが一定の電圧Ｖｓｔとなるように、点灯回路部５の出力を制御する。また、放電灯４には、定格ランプ電圧が略等しく、定格ランプ電力の異なる放電灯において、始動条件が同一なものを用いる。本実施形態より、灯具を替えずに、点灯させたい放電灯を自由に変更し、所望の光出力を得ることができる。
【００２８】
（実施形態１０）
図１５に第１０の実施形態を示す。本実施形態は、点灯回路部５として直流点灯方式の回路を用いたものである。この点灯回路部５は、スイッチング素子８とダイオード９とチョークコイル１０から成る降圧チョッパ回路と、コンデンサ１１とチョークコイル１２から成るフィルタ回路とから構成されている。降圧チョッパ回路内のスイッチング素子８は数１０ｋＨｚの高周波でＯＮ／ＯＦＦし、制御回路部６からの信号により、発振周波数やＯＮデューティを変化させることにより、放電灯４への出力電力を調整している。また、フィルタ回路は降圧チョッパ回路からの高周波を含んだ出力の高周波リップル成分を平滑する機能を有している。本実施形態により、直流点灯可能な放電灯についても、前記実施形態と同様に共用の点灯装置を実現できる。
【００２９】
（実施形態１１）
図１６に第１１の実施形態を示す。本実施形態は、点灯回路部５として低周波矩形波点灯方式の回路を用いたものである。この点灯回路部５は、実施形態１０に示した降圧チョッパ回路と、フィルタ回路と、スイッチング素子１３〜１６から成る極性反転回路とから構成されている。極性反転回路は前段の降圧チョッパ回路、フィルタ回路からの直流出力電力を、スイッチング素子１３と１６、スイッチング素子１４と１５が各々対となって、数１０Ｈｚから数１００Ｈｚの低周波で交互にＯＮ／ＯＦＦすることにより、放電灯４に低周波の矩形波電力を供給するようになっている。本実施形態により、直流点灯不可能な放電灯についても、前記実施形態と同様に共用の点灯装置を実現できる。
【００３０】
（実施形態１２）
図１７に第１２の実施形態を示す。本実施形態は、点灯回路部５として高周波点灯方式の回路を用いたものである。この点灯回路部５は、スイッチング素子１７、１８と、チョークコイル１９とコンデンサ２０とから構成されており、スイッチング素子１７、１８は交互に数１０ｋＨｚから数１００ｋＨｚの高周波でＯＮ／ＯＦＦを繰り返し、放電灯４に高周波電力を供給している。この周波数を制御回路部６からの信号により変化させることにより、放電灯４ヘの供給電力を調整している。本実施形態により、高周波点灯可能な放電灯についても、前記実施形態と同様に共用の点灯装置を実現できる。
【００３１】
【発明の効果】
本発明によれば、一つの放電灯点灯装置で、定格ランプ電圧が略等しく、定格ランプ電力の異なる多種の放電灯中のいずれかを点灯することができる。さらに、放電灯の口金、光中心距離、始動条件等を同じにすることにより、ソケット、イグナイタを含む灯具を同一にできることから、放電灯を交換するだけで、所望の出力の放電灯を点灯させる点灯装置を実現できる。
【図面の簡単な説明】
【図１】本発明の第１の実施形態のブロック回路図である。
【図２】従来例のブロック回路図である。
【図３】本発明の第１の実施形態のランプ電圧の経時変化を示す説明図である。
【図４】本発明の第１の実施形態の安定点灯時の出力を示す説明図である。
【図５】本発明の第２の実施形態のブロック回路図である。
【図６】本発明の第２の実施形態によるランプ種別ごとのランプ電流の制御範囲を示す説明図である。
【図７】本発明の第３の実施形態のブロック回路図である。
【図８】本発明の第３の実施形態によるランプ種別ごとの定電力制御を示す説明図である。
【図９】本発明の第４の実施形態によるランプ種別判別の原理を示す説明図である。
【図１０】本発明の第５の実施形態における温度センサの設置箇所を示す説明図である。
【図１１】本発明の第６の実施形態における光センサの設置箇所を示す説明図である。
【図１２】本発明の第７の実施形態のブロック回路図である。
【図１３】本発明の第８の実施形態に用いるランプの外観を示す正面図である。
【図１４】本発明の第９の実施形態のブロック回路図である。
【図１５】本発明の第１０の実施形態のブロック回路図である。
【図１６】本発明の第１１の実施形態のブロック回路図である。
【図１７】本発明の第１２の実施形態のブロック回路図である。
【符号の説明】
１交流電源
２直流電源回路部
３インバータ回路部
４放電灯
５点灯回路部
６制御回路部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a discharge lamp lighting device capable of lighting a plurality of types of discharge lamps having different lamp characteristics.
[0002]
[Prior art]
Conventionally, a copper-iron ballast has been the mainstream as a lighting device for lighting a discharge lamp. However, in recent years, electronic ballasts using many electronic components are becoming mainstream in order to reduce the weight, size, and functionality of ballasts. This electronic ballast will be briefly described below.
[0003]
FIG. 2 shows a block diagram of a conventional electronic ballast. A DC power supply circuit section 2 including a rectifier circuit is connected to the AC power supply 1, an inverter circuit section 3 capable of adjusting and controlling the power supplied to the discharge lamp is connected to the output terminal, and a discharge lamp 4 is connected to the output terminal. Has been.
[0004]
In such a conventional lighting device, when lighting a discharge lamp having different lamp characteristics, it is necessary to use a lighting device suitable for the discharge lamp to be lit. In other words, a dedicated lighting device has to be provided for each discharge lamp having different characteristics, and the investment in terms of development cost, period, and the like was great. From this, it is understood that the lighting device is required to have a performance capable of lighting a plurality of types of discharge lamps.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described points, and an object of the present invention is to provide a discharge lamp that can be lit by supplying appropriate power to each of a plurality of types of lamps having different rated powers. To provide an apparatus.
[0006]
[Means for Solving the Problems]
According to the present invention, in order to solve the above-described problem, the lighting circuit unit connected to the discharge lamp through the current limiting element, the first detection means for substantially detecting the lamp voltage, and the lamp power At least one of a second detection means that substantially detects, a determination means that determines the rated lamp power of the discharge lamp that is mounted in response to the output of the second detection means, and a lighting circuit section or a current limiting element; And a control means for controlling the discharge lamp to which at least one discharge lamp of a plurality of types of discharge lamp groups having substantially the same rated lamp voltage and different rated lamp power is mounted and which stably turns on the discharge lamp. In the electric lamp lighting device, the control means includes at least a lighting circuit unit or a current limiting element so that the output of the first detection means becomes a substantially constant voltage substantially equal to the rated lamp voltage for a predetermined period from the start of the discharge lamp. Control one side In the period, the rated lamp power of the discharge lamp is determined by the determining means, and after the predetermined period, the output of the second detecting means is substantially equal to the rated lamp power of the discharge lamp determined by the determining means. The control means controls at least one of the lighting circuit section and the current limiting element. Here, for controlling the current limiting element, a means for making the impedance of the impedance element connected in series with the discharge lamp variable can be used. For controlling the lighting circuit unit, means for varying the frequency or on-time width of the switching element of the chopper circuit or the inverter circuit can be used.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
FIG. 1 shows a first embodiment. The circuit of FIG. 1 includes an AC power source 1, a DC power source circuit unit 2 including a rectifying and smoothing circuit, an inverter circuit unit 3 including a lighting circuit unit 5 and a control circuit unit 6, and a discharge lamp 4. The control circuit unit 6 controls the output of the lighting circuit unit 5 so that the both-end voltage Vla applied to the discharge lamp 4 at the time of stable lighting of the discharge lamp 4 becomes a constant voltage Vst.
[0008]
The operation of this circuit will be described below. FIG. 3 shows the change in the lamp voltage Vla over time. The discharge lamp 4 is in a stable lighting state after the time Tr has elapsed from the start, and is stably lit at the lamp voltage Vst. Here, Vst is a voltage controlled by the control circuit unit 6 and applied to the discharge lamp 4.
[0009]
Next, the specification of the discharge lamp 4 will be described. As the discharge lamp 4, any one of various lamps having the same rated lamp voltage and different rated lamp power is inserted. For example, as shown in Table 1, the three lamps A, B, and C that are lit at the rated lamp voltage Vst = 90 V have different rated lamp powers of 39 W, 74 W, and 100 W, respectively.
[0010]
[Table 1]

FIG. 4 is a graph for explaining the output at the time of stable lamp lighting after the time Tr has elapsed since the lamp start in FIG. When the lamp voltage is stabilized at Vst, the power supplied to the discharge lamp 4 is 39 W when the lamp A is inserted, 74 W when the lamp B is inserted, according to the equivalent resistance value R (81Ω, 110Ω, 210Ω) of each lamp. When C is inserted, 100 W of lamp power is applied.
[0011]
As described above, this lighting device automatically lights up with a power suitable for the discharge lamp by lighting the discharge lamp with a predetermined output voltage when the lamp is stably lit. Various kinds of discharge lamps can be lit by the lighting device.
[0012]
(Embodiment 2)
FIG. 5 shows a second embodiment. FIG. 5 shows an AC power supply 1, a DC power supply circuit section 2 composed of a chopper circuit, an inverter circuit section 3 composed of a lighting circuit section 5 and a control circuit section 6, a discharge lamp 4, and a circuit DET for detecting a lamp current. The timer circuit TMR that measures a certain time Tst after the stable lighting from the start of the lamp and the determination circuit DST that determines which rated discharge lamp is mounted. The control circuit unit 6 controls the output of the lighting circuit unit 5 so that the both-end voltage Vla applied to the discharge lamp 4 becomes a constant voltage Vst when the discharge lamp 4 is stably lit.
[0013]
In the following, circuit operations different from those in the first embodiment will be described. When the lamp current detection circuit DET detects the lamp short circuit current and detects the start of the discharge lamp, the lamp current detection circuit DET sends a signal notifying the timer circuit TMR of the lamp start. The timer circuit TMR receives this signal, and counts the time Tst (see FIG. 3) when the discharge lamp surely reaches the lighting state. After the time Tst has elapsed, the timer circuit TMR sends a signal notifying the lamp discrimination circuit DST that the lamp is in a stable lighting state. In response to this, the determination circuit DST checks the current detected by the lamp current detection circuit DET, determines which rated power discharge lamp is inserted, and the current corresponding to the determined discharge lamp is Control to flow. At this time, as shown in FIG. 6, control is performed so that the current is between the minimum value Min and the maximum value Max set for each lamp type. In the above description, the lamp type is determined by the lamp current detection. However, it can be replaced with lamp power detection.
[0014]
As described above, this lighting device lights a discharge lamp at a predetermined output voltage when the lamp is stably lit, and automatically turns on a lamp suitable for the discharge lamp. Thus, various kinds of discharge lamps can be turned on.
[0015]
(Embodiment 3)
FIG. 7 shows a third embodiment. 7 shows an AC power supply 1, a DC power supply circuit section 2 including a rectifying and smoothing circuit, an inverter circuit section 3 including a lighting circuit section 5 and a control circuit section 6, a discharge lamp 4, and a circuit for detecting a lamp current. It consists of a DET, a timer circuit TMR that measures a certain time Tst after the lamp starts stable lighting, a circuit M that detects input power, and a discrimination circuit DST that discriminates which discharge lamp of which rated power is mounted. The control circuit unit 6 controls the output of the lighting circuit unit 5 so that the both-end voltage Vla applied to the discharge lamp 4 at the time of stable lighting of the discharge lamp 4 becomes a constant voltage Vst.
[0016]
In the following, circuit operations different from those in the first embodiment will be described. When the lamp current detection circuit DET detects the lamp short-circuit current and detects the start of the lamp, the lamp current detection circuit DET sends a signal notifying the start of the lamp to the timer circuit TMR. The timer circuit TMR receives this signal, and counts the time Tst (see FIG. 3) when the discharge lamp surely reaches the lighting state. After the time Tst has elapsed, the timer circuit TMR sends a signal notifying the lamp discrimination circuit DST that the lamp is in a stable lighting state. In response to this, the lamp discriminating circuit DST discriminates which rated power type of the discharge lamp is inserted from the input power calculated by the input power detection circuit M and the input current.
[0017]
In response to the determination result, the control circuit unit 6 cancels the constant Vla control in which the lamp voltage Vla is constant, and switches to the constant power control corresponding to the determined lamp power type. That is, when the lamp A (Table 1) is inserted, the R range of the output of about 39 W (FIG. 8), and when the lamp B (Table 1) is inserted, the Q of the output of about 74 W. When the range (FIG. 8) and lamp C (Table 1) are inserted, control is performed so that the P range (FIG. 8) with an output of approximately 100 W is output.
[0018]
In the above description, the lamp type is determined by detecting the input power, but the same can be obtained by detecting the input current, the lamp equivalent resistance value, and the rise time difference until the discharge lamp reaches a stable lighting state. It is possible to determine the lamp type.
[0019]
As described above, this lighting device lights a discharge lamp at a predetermined output voltage when the lamp is stably lit, and automatically turns on a lamp suitable for the discharge lamp. Thus, various kinds of discharge lamps can be turned on.
[0020]
(Embodiment 4)
FIG. 9 shows a fourth embodiment. This embodiment discriminates the power type of the discharge lamp inserted as in the second and third embodiments, but is characterized in that the starting stage before the lamp stabilization is used as the discriminating timing. The lamps A, B, and C in Table 1 each have a difference in time required to reach a constant voltage Vst when the lamp is stable. As shown in FIG. 9, when the ramp voltage rise value is measured from the time t1 to the time t2 at the same interval in the starting stage before the lamp is stabilized, dVA / dt, dVB / dt, dVC / dt are different for each lamp type. . From this difference, it is possible to determine which rated power type of lamp is inserted.
[0021]
The difference in the rise time is not limited to the lamp voltage, and the same determination can be made for the lamp power, the lamp current, the input power, and the input current.
[0022]
As described above, the present lighting device automatically lights up the discharge lamp with an output suitable for the discharge lamp after the lamp is stably lit based on the determination result of the lamp power type. Various kinds of discharge lamps can be lit by the lighting device.
[0023]
(Embodiment 5)
FIG. 10 shows a fifth embodiment. This embodiment shows a means for discriminating the power type of the inserted discharge lamp by a method other than the input / output electrical characteristics of the embodiments 2 to 4. The temperature sensor 23 shown in FIG. 10 is a means for measuring the lamp temperature. In lamps A, B, and C shown in Table 1, the difference in lamp rated power 39 W, 74 W, and 100 W also appears as the difference in lamp temperature. By utilizing this, it is possible to determine the type of lamp power by measuring the temperature when the lamp is lit.
[0024]
(Embodiment 6)
FIG. 11 shows a sixth embodiment. This embodiment shows a means for discriminating the power type of the inserted discharge lamp by a method other than the input / output electrical characteristics of the embodiments 2 to 4. The optical sensor 24 shown in FIG. 11 is a means for measuring the light emission amount of the lamp. In lamps A, B, and C shown in Table 1, the difference between the lamp rated powers of 39 W, 74 W, and 100 W also appears as the difference in light quantity. By using this, it is possible to determine the type of lamp power by measuring the amount of light emitted at the time of starting or lighting the lamp. This optical sensor can be used in place of an infrared / ultraviolet sensor or the like.
[0025]
(Embodiment 7)
FIG. 12 shows a seventh embodiment. In this embodiment, a memory function MEM is added to the discharge lamp lighting device of Embodiments 2 to 6. By storing the determination result of the lamp power type at the initial start of the lamp in this memory function, when the discharge lamp goes out and restarts when it is turned on, the rise of the restart is detected and the memory By feeding back the discrimination result at the time of initial start from the function to the discrimination circuit DST, it can be lit at an output suitable for the automatically inserted discharge lamp. The discharge lamp can be turned on, and the time required for determination can be shortened.
[0026]
(Embodiment 8)
FIG. 13 shows an eighth embodiment. In the present embodiment, the rated lamp voltages applicable to the lighting devices described in the first to seventh embodiments are approximately equal, and discharge lamps having different rated lamp powers have the same cap base and the optical center of the lamp. Those having the same distance L are used. In Table 1, an example of a lamp using a so-called E base type base as the base is given as an example. Furthermore, the base size of the E base is unified to one size such as E26. According to the present embodiment, a desired light output can be obtained by freely changing the lamp to be lit without changing the lamp.
[0027]
(Embodiment 9)
FIG. 14 shows a ninth embodiment. In the present embodiment, the battery 1 is used as the power source instead of the AC power source and the DC power source circuit unit including the rectifying and smoothing circuit. Further, an igniter circuit IGN for applying a high voltage to both ends of the lamp when no load is applied before the discharge lamp 4 is turned on is provided. The igniter circuit IGN is a device that generates a pulse-like high voltage when there is no load and causes the discharge lamp 4 to break down. A steep large current due to the lamp short-circuit state after the lamp dielectric breakdown is suppressed by the current suppression circuit 7. The control circuit unit 6 increases the energy supplied to the discharge lamp 4 by increasing the output voltage to a voltage Vnl (see FIG. 3) equal to or higher than Vst when there is no load, thereby improving the startability, and when the discharge lamp 4 is stably lit, The output of the lighting circuit unit 5 is controlled so that the applied both-end voltage Vla becomes a constant voltage Vst. In addition, as the discharge lamp 4, a discharge lamp having substantially the same rated lamp voltage and different rated lamp power and having the same starting condition is used. According to this embodiment, a desired light output can be obtained by freely changing the discharge lamp to be lit without changing the lamp.
[0028]
(Embodiment 10)
FIG. 15 shows a tenth embodiment. In the present embodiment, a DC lighting system circuit is used as the lighting circuit unit 5. The lighting circuit unit 5 includes a step-down chopper circuit including a switching element 8, a diode 9, and a choke coil 10, and a filter circuit including a capacitor 11 and a choke coil 12. The switching element 8 in the step-down chopper circuit is turned ON / OFF at a high frequency of several tens of kHz, and the output power to the discharge lamp 4 is adjusted by changing the oscillation frequency and the ON duty by a signal from the control circuit unit 6. Yes. The filter circuit has a function of smoothing the high frequency ripple component of the output including the high frequency from the step-down chopper circuit. According to the present embodiment, a common lighting device can be realized for a discharge lamp capable of direct current lighting as in the above-described embodiment.
[0029]
(Embodiment 11)
FIG. 16 shows an eleventh embodiment. In the present embodiment, a low-frequency rectangular wave lighting system circuit is used as the lighting circuit unit 5. The lighting circuit unit 5 includes the step-down chopper circuit shown in the tenth embodiment, a filter circuit, and a polarity inversion circuit including switching elements 13 to 16. The polarity inversion circuit turns on / off DC output power from the step-down chopper circuit and the filter circuit in the previous stage alternately at a low frequency of several tens to several hundreds of Hz, with the switching elements 13 and 16 and the switching elements 14 and 15 being paired. By turning off, low-frequency rectangular wave power is supplied to the discharge lamp 4. According to the present embodiment, a common lighting device can be realized for a discharge lamp that cannot be dc-lighted, as in the above-described embodiment.
[0030]
Embodiment 12
FIG. 17 shows a twelfth embodiment. In the present embodiment, a high-frequency lighting circuit is used as the lighting circuit unit 5. The lighting circuit unit 5 is composed of switching elements 17 and 18, a choke coil 19 and a capacitor 20. The switching elements 17 and 18 alternately repeat ON / OFF at a high frequency of several tens of kHz to several hundreds of kHz for release. High frequency power is supplied to the electric lamp 4. The power supplied to the discharge lamp 4 is adjusted by changing the frequency according to a signal from the control circuit unit 6. According to this embodiment, a common lighting device can be realized for a discharge lamp capable of high-frequency lighting as well as the above-described embodiment.
[0031]
【The invention's effect】
According to the present invention, a single discharge lamp lighting device can light any one of a variety of discharge lamps having substantially the same rated lamp voltage and different rated lamp power. Furthermore, since the lamp, including the socket and igniter can be made the same by making the base of the discharge lamp, the optical center distance, the starting condition, etc., the discharge lamp with the desired output can be turned on simply by replacing the discharge lamp. A lighting device can be realized.
[Brief description of the drawings]
FIG. 1 is a block circuit diagram of a first embodiment of the present invention.
FIG. 2 is a block circuit diagram of a conventional example.
FIG. 3 is an explanatory diagram showing a change over time in lamp voltage according to the first embodiment of the present invention.
FIG. 4 is an explanatory diagram showing an output at the time of stable lighting according to the first embodiment of the present invention.
FIG. 5 is a block circuit diagram of a second embodiment of the present invention.
FIG. 6 is an explanatory diagram showing a lamp current control range for each lamp type according to the second embodiment of the present invention;
FIG. 7 is a block circuit diagram of a third exemplary embodiment of the present invention.
FIG. 8 is an explanatory diagram showing constant power control for each lamp type according to the third embodiment of the present invention.
FIG. 9 is an explanatory diagram showing the principle of lamp type discrimination according to the fourth embodiment of the present invention.
FIG. 10 is an explanatory diagram showing an installation location of a temperature sensor according to a fifth embodiment of the present invention.
FIG. 11 is an explanatory diagram showing an installation location of an optical sensor according to a sixth embodiment of the present invention.
FIG. 12 is a block circuit diagram of a seventh exemplary embodiment of the present invention.
FIG. 13 is a front view showing an appearance of a lamp used in an eighth embodiment of the present invention.
FIG. 14 is a block circuit diagram according to a ninth embodiment of the present invention.
FIG. 15 is a block circuit diagram of a tenth embodiment of the present invention.
FIG. 16 is a block circuit diagram of an eleventh embodiment of the present invention.
FIG. 17 is a block circuit diagram of a twelfth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 AC power supply 2 DC power supply circuit part 3 Inverter circuit part 4 Discharge lamp 5 Lighting circuit part 6 Control circuit part

Claims

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes the stable lighting of the discharge lamp. When the discharge lamp is stably lit, the rated power type of the mounted discharge lamp is determined, and the output of the first detection means is the rated lamp voltage for a predetermined period from the start of the discharge lamp. Will be a substantially constant voltage approximately equal to In addition, after the lapse of the predetermined period, the control means is configured to provide at least one of the lighting circuit section and the current limiting element so that the output of the second detection means is substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by controlling the discharge lamp.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes the stable lighting of the discharge lamp. Input current is detected, the rated power type of the mounted discharge lamp is determined when the discharge lamp is steadily lit, and the output of the first detection means is the rated lamp voltage for a predetermined period from the start of the discharge lamp. Will be a substantially constant voltage approximately equal to In addition, after the lapse of the predetermined period, the control means is configured to provide at least one of the lighting circuit section and the current limiting element so that the output of the second detection means is substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by controlling the discharge lamp.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes the stable lighting of the discharge lamp. When the discharge lamp is stably lit, the rated power type of the mounted discharge lamp is determined, and the output of the first detection means is the rated lamp voltage for a predetermined period from the start of the discharge lamp. A substantially constant voltage approximately equal to As described above, after the lapse of the predetermined period, the control means has at least one of the lighting circuit section and the current limiting element so that the output of the second detection means is substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by controlling the discharge lamp.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes the stable lighting of the discharge lamp. When the discharge lamp is steadily lit, the rated power type of the mounted discharge lamp is determined, and the output of the first detection means is the rated lamp voltage for a predetermined period from the start of the discharge lamp. A substantially constant voltage approximately equal to As described above, after the lapse of the predetermined period, the control means has at least one of the lighting circuit section and the current limiting element so that the output of the second detection means is substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by controlling the discharge lamp.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes the stable lighting of the discharge lamp. When the discharge lamp is steadily lit, the rated power type of the mounted discharge lamp is determined, and the output of the first detection means is the rated lamp for a predetermined period from the start of the discharge lamp. The voltage is almost constant and almost equal to the voltage. As described above, after the elapse of the predetermined period, the control means is at least one of the lighting circuit section or the current limiting element so that the output of the second detection means is substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by controlling one of them.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes the stable lighting of the discharge lamp. The amount of infrared rays from the discharge lamp is detected, the rated power type of the mounted discharge lamp is determined when the discharge lamp is stably lit, and the output of the first detection means is output for a predetermined period from the start of the discharge lamp. Is approximately equal to the rated lamp voltage So that the output of the second detection means becomes substantially equal to the rated lamp power of the discharge lamp determined by the determination means after the predetermined period has elapsed, A discharge lamp lighting device that controls at least one of elements.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes the stable lighting of the discharge lamp. The lamp equivalent resistance value at the time is detected, the rated power type of the mounted discharge lamp is determined when the discharge lamp is stably lit, and the output of the first detection means is rated for a predetermined period from the start of the discharge lamp. A constant voltage approximately equal to the lamp voltage As described above, after the elapse of the predetermined period, the control means is connected to the lighting circuit section or the current limiting element so that the output of the second detection means is substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device that controls at least one of them.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In a discharge lamp lighting device that is equipped with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, a predetermined period from the start of the discharge lamp is The control means controls at least one of the lighting circuit section and the current limiting element so that the output of the one detection means becomes a substantially constant voltage substantially equal to the rated lamp voltage, and the discrimination means releases the discharge during the predetermined period. When starting the light Et output of the first detecting means detects the difference in time required until the voltage substantially equal to the rated lamp voltage, during stable lighting of the discharge lamp, to determine the rated power species of the discharge lamp has been installed, After the elapse of the predetermined period, the control means controls at least one of the lighting circuit section and the current limiting element so that the output of the second detection means becomes substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by:

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes The amount of change in the lamp voltage is detected, the rated power type of the mounted discharge lamp is determined at the start of the discharge lamp, and the output of the first detection means becomes the rated lamp voltage for a predetermined period from the start of the discharge lamp. So that the voltage is approximately equal and substantially constant After the predetermined period, the control means turns on at least one of the lighting circuit section and the current limiting element so that the output of the second detection means is substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by controlling.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes The amount of change in the lamp current is detected, the rated power type of the mounted discharge lamp is determined at the start of the discharge lamp, and the output of the first detection means becomes the rated lamp voltage for a predetermined period from the start of the discharge lamp. So that the voltage is approximately equal and substantially constant After the predetermined period, the control means turns on at least one of the lighting circuit section and the current limiting element so that the output of the second detection means is substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by controlling.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes The amount of change in lamp power is detected, the rated power type of the mounted discharge lamp is determined at the start of the discharge lamp, and the output of the first detection means is set to the rated lamp voltage for a predetermined period from the start of the discharge lamp. So that the voltage is approximately equal and substantially constant After the predetermined period, the control means turns on at least one of the lighting circuit section and the current limiting element so that the output of the second detection means is substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by controlling.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes The amount of change in input power is detected, the rated power type of the mounted discharge lamp is determined at the start of the discharge lamp, and the output of the first detection means is set to the rated lamp voltage for a predetermined period from the start of the discharge lamp. So that the voltage is approximately equal and approximately constant After the elapse of the predetermined period, the control means controls at least one of the lighting circuit section and the current limiting element so that the output of the second detection means becomes substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by:

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device that is mounted with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, the determination means includes The amount of change in input current is detected, the rated power type of the mounted discharge lamp is determined at the start of the discharge lamp, and the output of the first detection means is set to the rated lamp voltage for a predetermined period from the start of the discharge lamp. So that the voltage is approximately equal and approximately constant After the elapse of the predetermined period, the control means controls at least one of the lighting circuit section and the current limiting element so that the output of the second detection means becomes substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by:

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device in which at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers is mounted and the discharge lamp is stably lit, the determining means is configured to release the discharge lamp when starting the discharge lamp. The amount of change in ultraviolet rays emitted from the lamp is detected, the rated power type of the mounted discharge lamp is determined at the start of the discharge lamp, and the output of the first detection means is rated for a predetermined period from the start of the discharge lamp. A substantially constant voltage approximately equal to the lamp voltage. As described above, after the elapse of the predetermined period, the control means is connected to the lighting circuit section or the current limiting element so that the output of the second detection means is substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device that controls at least one of the above.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In the discharge lamp lighting device in which at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers is mounted and the discharge lamp is stably lit, the determining means is configured to release the discharge lamp when starting the discharge lamp. By detecting a change in the amount of light emitted from the lamp, the rated power type of the mounted discharge lamp is determined at the start of the discharge lamp, and the output of the first detection means is the rated lamp for a predetermined period from the start of the discharge lamp. It becomes a substantially constant voltage that is approximately equal to the voltage. As described above, after the lapse of the predetermined period, the control means has at least one of the lighting circuit section and the current limiting element so that the output of the second detection means is substantially equal to the rated lamp power of the discharge lamp determined by the determination means. A discharge lamp lighting device characterized by controlling the discharge lamp.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In a discharge lamp lighting device that is equipped with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, a predetermined period from the start of the discharge lamp is The control means controls at least one of the lighting circuit section and the current limiting element so that the output of one detection means becomes a substantially constant voltage substantially equal to the rated lamp voltage, and the discharge lamp Rating Determine the pump power, the after a predetermined time period, such that the output of the second detecting means becomes substantially equal to the rated lamp power discriminated discharge lamp by determining means, said control means lighting circuit unit or limited A discharge lamp lighting device that controls at least one of the flow elements.

18. The discharge lamp lighting device according to claim 17, wherein the determination unit determines a rated power type of a mounted discharge lamp when the discharge lamp is stably lit.

18. The discharge lamp lighting device according to claim 17, wherein the discriminating unit discriminates a rated power type of a mounted discharge lamp when starting the discharge lamp.

20. The maximum and minimum values of the lamp current are set for each type of rated lamp power of the discharge lamp determined by the determining means according to any one of claims 1 to 19, and the control means After the elapse of a predetermined period, the discharge lamp lighting device is controlled so that the lamp current is within the range between the maximum value and the minimum value.

A lighting circuit unit connected to the discharge lamp via the current limiting element, first detection means for substantially detecting the lamp voltage, second detection means for substantially detecting the lamp power, and second It comprises a judging means for judging the rated lamp power of the mounted discharge lamp in response to the output of the detecting means, and a control means for controlling at least one of the lighting circuit section or the current limiting element, and the rated lamp voltages are substantially equal. In a discharge lamp lighting device that is equipped with at least one discharge lamp of a plurality of types of discharge lamp groups having different rated lamp powers and stably lights the discharge lamp, a predetermined period from the start of the discharge lamp is After the elapse of a predetermined period, the output of the second detection means is determined to be the rated lamp power of the discharge lamp determined by the determination means so that the output of the first detection means becomes a substantially constant voltage substantially equal to the rated lamp voltage. To be approximately equal, In that control means for controlling at least one of the lighting circuit unit or current-limiting element comprises a means for storing the rated power species of the discharge lamp was determined at initial start-up of the discharge lamp, the discharge lamp undergoes extinction during operation After that, when the restart of the discharge lamp is detected, the lamp power is optimally controlled based on the stored determination result of the rated power type of the discharge lamp.

21. The apparatus according to any one of claims 1 to 20 , further comprising means for storing a rated power type of the discharge lamp determined at the initial start of the discharge lamp, and restarting the discharge lamp after the discharge lamp has gone out during lighting. When detected, a discharge lamp lighting device characterized in that the lamp power is optimally controlled based on the stored determination result of the rated power type of the discharge lamp.

23. The discharge lamp lighting device according to claim 1, wherein all of the discharge lamps attached to the discharge lamp lighting device have the same distance from the end of the base to the central portion of the arc tube.

24. The discharge lamp lighting device according to claim 1, wherein all the discharge lamps attached to the discharge lamp lighting device have the same base shape.

25. The discharge lamp lighting device according to claim 24, wherein the cap portions of all the discharge lamps attached to the discharge lamp lighting device have a shape that can be inserted into an Edison base type socket.

26. The discharge lamp lighting device according to claim 25, wherein the cap portions of all the discharge lamps attached to the discharge lamp lighting device have a shape that can be inserted into an E26 type socket.

27. The discharge lamp lighting device according to claim 1, wherein all the discharge lamps attached to the discharge lamp lighting device have the same starting conditions.

28. The discharge lamp lighting device according to claim 1, further comprising means for applying a predetermined lamp voltage equal to or higher than a rated lamp voltage when there is no load before the discharge lamp is lit.

29. The discharge lamp lighting device according to claim 1, further comprising high voltage generating means for starting a discharge lamp.

30. The discharge lamp lighting device according to claim 1, further comprising means for limiting a lamp current when starting the discharge lamp.

31. The discharge lamp lighting device according to claim 1, wherein the lighting circuit unit lights the discharge lamp with a DC voltage.

31. The discharge lamp lighting device according to claim 1, wherein the lighting circuit unit lights the discharge lamp with a low-frequency rectangular wave voltage.

31. The discharge lamp lighting device according to claim 1, wherein the lighting circuit unit lights the discharge lamp with a high frequency voltage.