JPS5475184A - Fluorescent lamp - Google Patents

Fluorescent lamp

Info

Publication number
JPS5475184A
JPS5475184A JP14238477A JP14238477A JPS5475184A JP S5475184 A JPS5475184 A JP S5475184A JP 14238477 A JP14238477 A JP 14238477A JP 14238477 A JP14238477 A JP 14238477A JP S5475184 A JPS5475184 A JP S5475184A
Authority
JP
Japan
Prior art keywords
phosphor
coated
fluorescent lamp
transmission
portions
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
JP14238477A
Other languages
Japanese (ja)
Inventor
Katsufumi Ouchi
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14238477A priority Critical patent/JPS5475184A/en
Publication of JPS5475184A publication Critical patent/JPS5475184A/en
Pending legal-status Critical Current

Links

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

PURPOSE: To effectively utilize the quantity of light, by eliminating the need for shading correction at the outside by performing shading correction by fluorescent lamp itself by appropriately selecting the rate of transmission portions and a portion, which is coated with a phosphor, of an aperture portion.
CONSTITUTION: A central portion in the tubular length direction of an aperture portion p, a non-reflective portion not coated with a high reflective matter for preventing transmission, is coated with a phosphor 2 and surroundings in the tubular axial direction of the aperture porion p, both end portions of a fluorescent lamp, are shaped in transmission conditions without applying the phosphor 2 to the surroundings. Consequently, the aperture portion p is provided with a portion coated with the phosphor and transmission portions, and portions corresponding to both end portions of the fluorescent lamp are shaped in transmission conditions, thus heighting the luminance of both end portions higher than the central portion in the tubular axial direction of the luminescent lamp.
COPYRIGHT: (C)1979,JPO&Japio
JP14238477A 1977-11-28 1977-11-28 Fluorescent lamp Pending JPS5475184A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14238477A JPS5475184A (en) 1977-11-28 1977-11-28 Fluorescent lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14238477A JPS5475184A (en) 1977-11-28 1977-11-28 Fluorescent lamp

Publications (1)

Publication Number Publication Date
JPS5475184A true JPS5475184A (en) 1979-06-15

Family

ID=15314101

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14238477A Pending JPS5475184A (en) 1977-11-28 1977-11-28 Fluorescent lamp

Country Status (1)

Country Link
JP (1) JPS5475184A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04133226U (en) * 1991-05-31 1992-12-11 京セラ株式会社 liquid crystal display element
FR2713825A1 (en) * 1993-12-10 1995-06-16 Gen Electric Light source with an optical interference filter, method for forming such a filter and lighting system provided with such a light source.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04133226U (en) * 1991-05-31 1992-12-11 京セラ株式会社 liquid crystal display element
FR2713825A1 (en) * 1993-12-10 1995-06-16 Gen Electric Light source with an optical interference filter, method for forming such a filter and lighting system provided with such a light source.

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