JPH0299599U

JPH0299599U -

Info

Publication number: JPH0299599U
Application number: JP893289U
Authority: JP
Priority date: 1989-01-26
Filing date: 1989-01-26
Publication date: 1990-08-08

Description

[Brief explanation of drawings]

第１図はこの考案の第１の実施例の放電灯点灯
装置の構成を示すブロツク図、第２図は第１図の
ブロツクの具体構成を示す回路図、第３図は放電
ランプの正常点灯時の第２図の要部のタイムチヤ
ーム、第４図は放電ランプの不点灯時の第２図の
要部のタイムチヤート、第５図はこの考案の第２
の実施例の放電灯点灯装置の構成を示す要部回路
図、第６図は従来の放電灯点灯装置の一例を示す
回路図、第７図は第６図の放電灯点灯装置の欠点
の説明図、第８図は従来の放電灯点灯装置の他の
例を示す回路図、第９図は従来の放電灯点灯装置
のさらに他の例を示す回路図である。Ｖ_１……商用交流電源、Ｂ_４……放電灯安定器
、ｌ_１，ｌ_２……照明器具配線、Ｆ_３……照明器
具、Ｇ_１……限流要素、ＳＧ_１……電圧制限要素
、ＴＭ_２……タイマ、Ｘ_１……ランプ状態検出部
、ＩＧ_２……高圧パルス発生器、ＤＬ……放電ラ
ンプ。 Fig. 1 is a block diagram showing the configuration of the discharge lamp lighting device of the first embodiment of this invention, Fig. 2 is a circuit diagram showing the specific structure of the block in Fig. 1, and Fig. 3 is a normal lighting of the discharge lamp. Figure 4 is a time chart of the main part of Figure 2 when the discharge lamp is not lit, Figure 5 is the time chart of the main part of Figure 2 of this invention.
6 is a circuit diagram showing an example of a conventional discharge lamp lighting device, and FIG. 7 is an explanation of drawbacks of the discharge lamp lighting device of FIG. 6. 8 is a circuit diagram showing another example of the conventional discharge lamp lighting device, and FIG. 9 is a circuit diagram showing still another example of the conventional discharge lamp lighting device. V ₁ ... Commercial AC power supply, B ₄ ... Discharge lamp ballast, l ₁ , l ₂ ... Lighting equipment wiring, F ₃ ... Lighting equipment, G ₁ ... Current limiting element, SG ₁ ... Voltage limiting element , _TM2 ...Timer, _X1 ...Lamp state detection section, _IG2 ...High voltage pulse generator, DL...Discharge lamp.

Claims

[Scope of Claim for Utility Model Registration] A discharge lamp ballast having an input terminal connected to a commercial AC power supply, and a lighting fixture connected to the output terminal of the discharge lamp ballast via lighting fixture wiring, the lighting fixture comprising: a high-voltage pulse generator driven by power supplied from the discharge lamp ballast through the lighting equipment wiring; and a high-voltage pulse generator that starts or restarts with the high-voltage pulse output from the high-voltage pulse generator, and then passes the lighting equipment wiring through the high-voltage pulse generator. The discharge lamp ballast is configured to include a discharge lamp that is supplied with power and is lit steadily, and the discharge lamp ballast is configured to include a current limiting element that limits the lamp current flowing from the commercial AC power source to the discharge lamp, and a current limiting element that limits the lamp current that flows from the commercial AC power source to the discharge lamp, and a timer for setting a certain period of time, and based on the output of this timer, the voltage on the output side of the current limiting element is limited to a lower limit voltage at which the high voltage pulse generator can operate after a certain period of time has elapsed immediately after turning on the commercial AC power source. a voltage limiting element that detects whether or not the discharge lamp is lit based on a change in the voltage on the output side of the current limiting element or a change in the current flowing through the current limiting element, and controls the voltage limiting element in response to lighting of the discharge lamp; A discharge lamp lighting device comprising a lamp state detection unit that prohibits operation of an element.