GB1392480A - Post acceleration type cathode ray tubes - Google Patents

Post acceleration type cathode ray tubes

Info

Publication number
GB1392480A
GB1392480A GB5507872A GB5507872A GB1392480A GB 1392480 A GB1392480 A GB 1392480A GB 5507872 A GB5507872 A GB 5507872A GB 5507872 A GB5507872 A GB 5507872A GB 1392480 A GB1392480 A GB 1392480A
Authority
GB
United Kingdom
Prior art keywords
electrode
ray tubes
acceleration type
secondary electrons
cathode ray
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.)
Expired
Application number
GB5507872A
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
Publication of GB1392480A publication Critical patent/GB1392480A/en
Expired 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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • 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
    • H01J29/80—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/20—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours
    • H01J31/201—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

1392480 Cathode-ray tubes HITACHI Ltd 29 Nov 1972 [30 Nov 1971] 55078/72 Heading H1D A cathode-ray tube of the post-acceleration type is provided with a secondary-election collector constructed, e.g. perforated or made of mesh, to transmit a portion of the secondary electrons. In the shadow-mask tube shown (Fig. 1), an accelerating electrode 8 is formed on the inside of the funnel 2 and a shield electrode 9 is situated behind the shadow mask 5. The electrode 9 functions to shield the beam from external influences and is usually coated with a material which prevents generation of secondary electrons. According to the invention, the electrode 9 is constucted so that some of the secondary electrons generated, e.g. by the shadow mask 5 are transmitted to the coating 8. It is stated that a reduction in secondary electron generation is obtained. The oscilloscope of Fig. 4 is provided with a helical electrode 17 and a perforated collector electrode 15, and an accelerator electrode 16.
GB5507872A 1971-11-30 1972-11-29 Post acceleration type cathode ray tubes Expired GB1392480A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11181171U JPS5127726Y2 (en) 1971-11-30 1971-11-30

Publications (1)

Publication Number Publication Date
GB1392480A true GB1392480A (en) 1975-04-30

Family

ID=14570739

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5507872A Expired GB1392480A (en) 1971-11-30 1972-11-29 Post acceleration type cathode ray tubes

Country Status (2)

Country Link
JP (1) JPS5127726Y2 (en)
GB (1) GB1392480A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7316388A (en) * 1973-11-30 1975-06-03 Philips Nv CATHOD BEAM TUBE FOR DISPLAYING COLORED IMAGES.
EP0085238B1 (en) * 1982-01-19 1990-07-11 Hewlett-Packard Company Penetration cathode ray tubes

Also Published As

Publication number Publication date
JPS4866463U (en) 1973-08-23
JPS5127726Y2 (en) 1976-07-13

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Legal Events

Date Code Title Description
PS Patent sealed
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee