JPS55136436A - Projection cathode-ray tube - Google Patents

Projection cathode-ray tube

Info

Publication number
JPS55136436A
JPS55136436A JP4342679A JP4342679A JPS55136436A JP S55136436 A JPS55136436 A JP S55136436A JP 4342679 A JP4342679 A JP 4342679A JP 4342679 A JP4342679 A JP 4342679A JP S55136436 A JPS55136436 A JP S55136436A
Authority
JP
Japan
Prior art keywords
meniscus lens
funnel
ray tube
rays
projection cathode
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
JP4342679A
Other languages
Japanese (ja)
Inventor
Takashi Sugawara
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 JP4342679A priority Critical patent/JPS55136436A/en
Publication of JPS55136436A publication Critical patent/JPS55136436A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/86—Vessels; Containers; Vacuum locks
    • H01J29/89—Optical or photographic arrangements structurally combined or co-operating with the vessel
    • H01J29/894—Arrangements combined with the vessel for the purpose of image projection on a screen

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

PURPOSE:To eliminate the radiation of X-rays as well as make projection cathode- ray tube inexpensive by constructing a vacuum outer case with a funnel and a meniscus lens and also providing a fluorescent screen and a X-rays shield on the meniscus lens. CONSTITUTION:The vacuum outer case 1 consists of the funnel 3 with the neck portion 2 and the meniscus lens 10 attached to the opening portion of the funnel 3 in a sealed manner. The convexed surface of the meniscus lens 10 is directly provided with the flurorescent screen 12 and also the X-rays shield 15 is attached to the projection area on the outside of the fluorescent screen 12.
JP4342679A 1979-04-09 1979-04-09 Projection cathode-ray tube Pending JPS55136436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4342679A JPS55136436A (en) 1979-04-09 1979-04-09 Projection cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4342679A JPS55136436A (en) 1979-04-09 1979-04-09 Projection cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS55136436A true JPS55136436A (en) 1980-10-24

Family

ID=12663365

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4342679A Pending JPS55136436A (en) 1979-04-09 1979-04-09 Projection cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS55136436A (en)

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