JPS55148340A - Cathode ray tube for light source - Google Patents

Cathode ray tube for light source

Info

Publication number
JPS55148340A
JPS55148340A JP5591879A JP5591879A JPS55148340A JP S55148340 A JPS55148340 A JP S55148340A JP 5591879 A JP5591879 A JP 5591879A JP 5591879 A JP5591879 A JP 5591879A JP S55148340 A JPS55148340 A JP S55148340A
Authority
JP
Japan
Prior art keywords
electrode
fluorescent screen
grids
light emitting
electron beams
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.)
Granted
Application number
JP5591879A
Other languages
Japanese (ja)
Other versions
JPS6334589B2 (en
Inventor
Eiso Nosaka
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 JP5591879A priority Critical patent/JPS55148340A/en
Priority to FR8010206A priority patent/FR2456387A1/en
Priority to US06/147,544 priority patent/US4344017A/en
Priority to DE3017693A priority patent/DE3017693C2/en
Priority to GB8015279A priority patent/GB2052844B/en
Publication of JPS55148340A publication Critical patent/JPS55148340A/en
Publication of JPS6334589B2 publication Critical patent/JPS6334589B2/ja
Granted 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
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/48—Electron guns

Abstract

PURPOSE:To eliminate the need for the deflection system of a beam of electrons by guiding the electron beams emitted from a cathode into the tri-electrode system consisting of the first, second, the third grids and varying the electrode length of the second grid. CONSTITUTION:The electron beams 6 emitted from the cathode 4 pass through the first, second, and third grids 1, 2, and 3 and produce the light emitting spot D1 on the fluorescent screen 5. When the electrode length l2 of the second gride exceeds the bore of the electrode, the electron lens consisting of the second and third grids 2 and 3 functions as an exceedingly strong bipotential lens whose voltage ratio is N. When the electrode length arrives at l3, the electron beams 6 are focussed on the front 10 of the fluorescent screen 5. After that, an angle of emanation increases and the larger over-focussed light emitting spot D3 is obtained on the fluorescent screen. By varying the axial length l0 of the second gride electrode, the necessary light emitting spot diameter can be obtained on the fluorescent screen without decreasing the voltage of the fuoresent screen.
JP5591879A 1979-05-08 1979-05-08 Cathode ray tube for light source Granted JPS55148340A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP5591879A JPS55148340A (en) 1979-05-08 1979-05-08 Cathode ray tube for light source
FR8010206A FR2456387A1 (en) 1979-05-08 1980-05-07 CATHODE RAY TUBE USED AS A LIGHT SOURCE
US06/147,544 US4344017A (en) 1979-05-08 1980-05-07 Cathode ray tube used as light source
DE3017693A DE3017693C2 (en) 1979-05-08 1980-05-08 Cathode ray tube for use as a light source
GB8015279A GB2052844B (en) 1979-05-08 1980-05-08 Cathode ray tube used as light source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5591879A JPS55148340A (en) 1979-05-08 1979-05-08 Cathode ray tube for light source

Publications (2)

Publication Number Publication Date
JPS55148340A true JPS55148340A (en) 1980-11-18
JPS6334589B2 JPS6334589B2 (en) 1988-07-11

Family

ID=13012475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5591879A Granted JPS55148340A (en) 1979-05-08 1979-05-08 Cathode ray tube for light source

Country Status (1)

Country Link
JP (1) JPS55148340A (en)

Also Published As

Publication number Publication date
JPS6334589B2 (en) 1988-07-11

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