JPS6484599A - Discharge light lighting device - Google Patents

Discharge light lighting device

Info

Publication number
JPS6484599A
JPS6484599A JP24209287A JP24209287A JPS6484599A JP S6484599 A JPS6484599 A JP S6484599A JP 24209287 A JP24209287 A JP 24209287A JP 24209287 A JP24209287 A JP 24209287A JP S6484599 A JPS6484599 A JP S6484599A
Authority
JP
Japan
Prior art keywords
circuit
lamp
light controlling
stepwise
impedance
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
JP24209287A
Other languages
Japanese (ja)
Inventor
Shigehisa Yoshida
Yuji Nakabayashi
Seinosuke Obara
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.)
Panasonic Electric Works Co Ltd
Meiji National Industrial Co Ltd
Original Assignee
Meiji National Industrial Co Ltd
Matsushita Electric Works Ltd
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 Meiji National Industrial Co Ltd, Matsushita Electric Works Ltd filed Critical Meiji National Industrial Co Ltd
Priority to JP24209287A priority Critical patent/JPS6484599A/en
Publication of JPS6484599A publication Critical patent/JPS6484599A/en
Pending legal-status Critical Current

Links

Landscapes

  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)

Abstract

PURPOSE:To prevent occurrence of moving stripes by serially connecting a circuit where light controlling impedance, stepwise light controlling switch and a circuit for setting tube current asymmetric are parallely connected, to a discharge lamp, in the case when the lamp is lighted with high frequency power with restless section. CONSTITUTION:When a discharge lamp 2 is lighted by operating a high frequency conversion circuit 1 with a fully smoothened power supply Vs, to the output side of a circuit 1, a circuit for setting tube current asymmetric composed of a stepwise light controlling impedance L1, stepwise light controlling switch S1, resistor R and diode D is parallely connected, while connected serially to the lamp 2. In the case of stepwise operation, the switch S1 is opened, and the impedance L1 is inserted as well as the circuit 3 is inserted in serial to the lamp. It is thus possible to prevent occurrence of stripes by supplying asymmetrical current to the lamp 2 at stepwise light controlling operation.
JP24209287A 1987-09-26 1987-09-26 Discharge light lighting device Pending JPS6484599A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24209287A JPS6484599A (en) 1987-09-26 1987-09-26 Discharge light lighting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24209287A JPS6484599A (en) 1987-09-26 1987-09-26 Discharge light lighting device

Publications (1)

Publication Number Publication Date
JPS6484599A true JPS6484599A (en) 1989-03-29

Family

ID=17084178

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24209287A Pending JPS6484599A (en) 1987-09-26 1987-09-26 Discharge light lighting device

Country Status (1)

Country Link
JP (1) JPS6484599A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04220521A (en) * 1990-03-12 1992-08-11 Westinghouse Electric Corp <We> Computation controlling apparatus for sensor data

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04220521A (en) * 1990-03-12 1992-08-11 Westinghouse Electric Corp <We> Computation controlling apparatus for sensor data

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