JPS5813700U

JPS5813700U - discharge lamp lighting device

Info

Publication number: JPS5813700U
Application number: JP10759481U
Authority: JP
Inventors: 友藤　吉明
Original assignee: 松下電工株式会社
Priority date: 1981-07-20
Filing date: 1981-07-20
Publication date: 1983-01-28

Abstract

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

Description

[Brief explanation of the drawing]

第１図は従来の放電灯点灯装置、第２図は制御装置、第
３図ＶＣ５〜Ｄはタイムチャート、第４図ａ、　　ｂは
説明図、第５図は本考案の放電灯点灯装置、第６図〜第
１１図は他の実施例を示す。ＤＢ・・・整流装置、Ｐ・・・制御装置、１・・・放電
灯、Ｌｏ、　Ｌ□、Ｌ２・・・インダクタ。ｒ　−−−−−−−−−一−− Ｌ−−−−−−−−−−　　＋FIG. 1 is a conventional discharge lamp lighting device, FIG. 2 is a control device, FIG. 3 is a time chart of VC5 to D, FIG. 4 is an explanatory diagram, and FIG. 5 is a discharge lamp lighting device of the present invention. 6 to 11 show other embodiments. DB... Rectifier, P... Control device, 1... Discharge lamp, Lo, L□, L2... Inductor. r −−−−−−−−−1−− L−−−−−−−−−− +

Claims

[Scope of utility model registration request]

A resonant circuit consisting of an inductor and a capacitor and a switch element are connected in series, and then a DC power supply and an inductor are connected in series, and an impedance element is connected at the connection point between one set of resonant circuits and the switch element. Connect one end of the series circuit of the lamp and the other end to the connection point of another set of resonant circuits and the switch element, or provide secondary windings on a plurality of inductors and connect them in series with the lamp, In addition, secondary windings for preheating the filament of the lamp are provided on the plurality of inductors, and during preheating, the switching elements are simultaneously turned on and off to effectively reduce the voltage applied to the lamp to zero, and the voltage generated in the plurality of inductors is In a discharge lamp lighting device, a preheating current is caused to flow through a filament of a lamp by synthesizing the voltages, and then the combined voltage is made to be zero or close to zero by alternately turning on and off a switch element, and the preheating current is made to be zero or close to zero. A discharge lamp lighting device comprising means for increasing the energy stored in the inductor in the resonant circuit while the switch elements are simultaneously turned on and off.