JPS5557251A - Illuminating apparatus - Google Patents

Illuminating apparatus

Info

Publication number
JPS5557251A
JPS5557251A JP13071578A JP13071578A JPS5557251A JP S5557251 A JPS5557251 A JP S5557251A JP 13071578 A JP13071578 A JP 13071578A JP 13071578 A JP13071578 A JP 13071578A JP S5557251 A JPS5557251 A JP S5557251A
Authority
JP
Japan
Prior art keywords
lamp
lighting
power consumption
voltage
πdl
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
JP13071578A
Other languages
Japanese (ja)
Inventor
Masahiro Dobashi
Hitoshi Kodama
Keiichi Baba
Masato Saito
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP13071578A priority Critical patent/JPS5557251A/en
Publication of JPS5557251A publication Critical patent/JPS5557251A/en
Pending legal-status Critical Current

Links

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  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

PURPOSE: To reduce power consumption by increasing lamp voltage by regulating the structure of the luminous tube of a high pressure mercury lamp so that a specific formula is satisfied and lighting-up the mercury lamp by means of a 75W delayed phase type stabilizer.
CONSTITUTION: The shape of a luminous tube 1 having electrodes 2 and 2 sealed at both end parts is regulated so that the following four formulas are satisfied, when lamp power reduction rate is α. 0.6 ≤ d ≤ 0.85, 5 ≤ 75(1-α)/πdla+4πlc 2 ≤ 10, 0.1≤4πlc 2/πdla+4πlc 2≤0.5, 0.1≤lc/la ≤0.4. Then, the lamp voltage is increased, higher than the former, above 135V and below 180V, and lighting-up of the lamp is performed by a 75W delayed phase type stabilizer. Accordingly, lighting-up can be obtained in the voltage characteristic with small power consumption, so stable characteristic can be obtained, and power consumption can be reduced.
COPYRIGHT: (C)1980,JPO&Japio
JP13071578A 1978-10-24 1978-10-24 Illuminating apparatus Pending JPS5557251A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13071578A JPS5557251A (en) 1978-10-24 1978-10-24 Illuminating apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13071578A JPS5557251A (en) 1978-10-24 1978-10-24 Illuminating apparatus

Publications (1)

Publication Number Publication Date
JPS5557251A true JPS5557251A (en) 1980-04-26

Family

ID=15040884

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13071578A Pending JPS5557251A (en) 1978-10-24 1978-10-24 Illuminating apparatus

Country Status (1)

Country Link
JP (1) JPS5557251A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954165A (en) * 1982-09-22 1984-03-28 Toshiba Corp Small metal halide lamp

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5954165A (en) * 1982-09-22 1984-03-28 Toshiba Corp Small metal halide lamp
JPH0364985B2 (en) * 1982-09-22 1991-10-09

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