JPS56138852A - Fluorescent lamp - Google Patents

Fluorescent lamp

Info

Publication number
JPS56138852A
JPS56138852A JP4134480A JP4134480A JPS56138852A JP S56138852 A JPS56138852 A JP S56138852A JP 4134480 A JP4134480 A JP 4134480A JP 4134480 A JP4134480 A JP 4134480A JP S56138852 A JPS56138852 A JP S56138852A
Authority
JP
Japan
Prior art keywords
electrode
layer
phosphor layer
alkaline earth
earth metal
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
JP4134480A
Other languages
Japanese (ja)
Inventor
Hitoshi Yamazaki
Takao Takeda
Hideo Ozawa
Hiroshi Ito
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 JP4134480A priority Critical patent/JPS56138852A/en
Publication of JPS56138852A publication Critical patent/JPS56138852A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/24—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J61/26—Means for absorbing or adsorbing gas, e.g. by gettering; Means for preventing blackening of the envelope

Abstract

PURPOSE:To prevent coloring of the ends of a fluorescent lamp, during its life time, by providing a fine grain layer made of a borate of an alkaline earth metal over a phosphor layer in the vicinity of the electrode. CONSTITUTION:A phosphor layer 2 is formed on the inner wall of a galss tube 1. An electrode 4 is coated with an electron-discharging substance. A thin layer 3 made of a fine borate powder of an alkaline earth metal is formed on a part of the phosphor layer 2 which is near the electrode 4. Owing to such a constitution, metal barium or the like, which is scattered from the electrode 4 during the burning of a fluorescent lamp, touches the layer 3 and is oxidized into a white oxide, thus any coloring of the tube 1 being prevented. Besides, the provision of the thin layer 3 prepared from the former fine borate powder on the phosphor layer 3 does not decrease the luminous efficiency of the lamp, since an acid salt of an alkaline earth metal highly reflects both visible rays and ultraviolet rays.
JP4134480A 1980-03-31 1980-03-31 Fluorescent lamp Pending JPS56138852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4134480A JPS56138852A (en) 1980-03-31 1980-03-31 Fluorescent lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4134480A JPS56138852A (en) 1980-03-31 1980-03-31 Fluorescent lamp

Publications (1)

Publication Number Publication Date
JPS56138852A true JPS56138852A (en) 1981-10-29

Family

ID=12605895

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4134480A Pending JPS56138852A (en) 1980-03-31 1980-03-31 Fluorescent lamp

Country Status (1)

Country Link
JP (1) JPS56138852A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004055860A1 (en) * 2002-12-18 2004-07-01 Koninklijke Philips Electronics N.V. Contaminant getter on uv reflective base coat in fluorescent lamps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004055860A1 (en) * 2002-12-18 2004-07-01 Koninklijke Philips Electronics N.V. Contaminant getter on uv reflective base coat in fluorescent lamps
JP2006511040A (en) * 2002-12-18 2006-03-30 コーニンクレッカ　フィリップス　エレクトロニクス　エヌ　ヴィ Impurity getter of UV reflection base coat in fluorescent lamp
US7449835B2 (en) 2002-12-18 2008-11-11 Koninklijke Philips Electronics Contaminant getter on UV reflective base coat in fluorescent lamps

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