JPS5769650A - Color picture tube and manufacture - Google Patents

Color picture tube and manufacture

Info

Publication number
JPS5769650A
JPS5769650A JP14451080A JP14451080A JPS5769650A JP S5769650 A JPS5769650 A JP S5769650A JP 14451080 A JP14451080 A JP 14451080A JP 14451080 A JP14451080 A JP 14451080A JP S5769650 A JPS5769650 A JP S5769650A
Authority
JP
Japan
Prior art keywords
electron beam
shadow mask
manufacture
bypotential
focused
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
JP14451080A
Other languages
Japanese (ja)
Inventor
Yasuo Oota
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14451080A priority Critical patent/JPS5769650A/en
Publication of JPS5769650A publication Critical patent/JPS5769650A/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
    • H01J29/46—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
    • H01J29/81—Arrangements for controlling the ray or beam after passing the main deflection system, e.g. for post-acceleration or post-concentration, for colour switching using shadow masks

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

PURPOSE:To improve the electron beam permeability of a shadow mask by constructing the electron beam pass hole of a shadow mask to have the function of bypotential type tubular lens for focusing the electron beam onto a phosphor material layer. CONSTITUTION:An insulator 273 is placed between two shadow mask members 271, 272 in a shadow mask 27 then different potentials are applied between said members 271, 272 and the function of bypotential lens type tubular lens having the potential ratio within 1.1-1.3 is provided to each electron beam pass hole 29. Consequently the electron beam 33 is focused when passing through the hole 29 and the width of the electron beam impinged on a phosphor face 19 is focused from width (A) to (B). Consequently the permeability of the electron beam 33 of the shadow mask 27 is improved resulting in the improvement of the brightness of the screen.
JP14451080A 1980-10-17 1980-10-17 Color picture tube and manufacture Pending JPS5769650A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14451080A JPS5769650A (en) 1980-10-17 1980-10-17 Color picture tube and manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14451080A JPS5769650A (en) 1980-10-17 1980-10-17 Color picture tube and manufacture

Publications (1)

Publication Number Publication Date
JPS5769650A true JPS5769650A (en) 1982-04-28

Family

ID=15364031

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14451080A Pending JPS5769650A (en) 1980-10-17 1980-10-17 Color picture tube and manufacture

Country Status (1)

Country Link
JP (1) JPS5769650A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2531809A1 (en) * 1982-08-11 1984-02-17 Rca Corp CATHODE RAY TUBE WITH FOCUSING MASK

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2531809A1 (en) * 1982-08-11 1984-02-17 Rca Corp CATHODE RAY TUBE WITH FOCUSING MASK
JPS5949140A (en) * 1982-08-11 1984-03-21 アールシーエー　ライセンシング　コーポレーシヨン Cathode ray tube
JPS6367310B2 (en) * 1982-08-11 1988-12-23 Rca Corp

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