JPS5790849A - Color picture tube - Google Patents

Color picture tube

Info

Publication number
JPS5790849A
JPS5790849A JP16667980A JP16667980A JPS5790849A JP S5790849 A JPS5790849 A JP S5790849A JP 16667980 A JP16667980 A JP 16667980A JP 16667980 A JP16667980 A JP 16667980A JP S5790849 A JPS5790849 A JP S5790849A
Authority
JP
Japan
Prior art keywords
shadow mask
thermal expansion
metal piece
picture tube
support mount
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
JP16667980A
Other languages
Japanese (ja)
Inventor
Makoto Fujinuma
Masaomi Futatsudera
Makoto Harikae
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 JP16667980A priority Critical patent/JPS5790849A/en
Publication of JPS5790849A publication Critical patent/JPS5790849A/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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/06—Screens for shielding; Masks interposed in the electron stream
    • H01J29/07—Shadow masks for colour television tubes
    • H01J29/073—Mounting arrangements associated with shadow masks

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

PURPOSE:To prevent deterioration of characteristic of a picture tube caused by a heat treatment of high temperature during its production, by supporting a shadow mask with a support mount which is composed of three elastic metal pieces with different coefficients of thermal expansion respectively. CONSTITUTION:A shadow mask assembly 18, composed of a shadow mask 16 and a mask frame 17, is supported to a panel pin 20 of an outer hull 11 by a shadow mask support mount 30, which is composed of three metal pieces joining in one body, i.e., an elastic metal piece 31 with about the same coefficient of thermal expansion as the mask frame 17 located at the center, a metal piece 32 with higher coefficient of thermal expansion and a metal piece 33 with lower coefficient of thermal expansion located at both sides of the metal piece 31. According to this constitution, permanent deformation caused by a heat treatment of high temperature during the production of a picture tube will not occur in the positional relationship between the mask frame 17 and the shadow mask support mount 30, thereby deterioration of characteristic, such as color regeneration, can be prevented.
JP16667980A 1980-11-28 1980-11-28 Color picture tube Pending JPS5790849A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16667980A JPS5790849A (en) 1980-11-28 1980-11-28 Color picture tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16667980A JPS5790849A (en) 1980-11-28 1980-11-28 Color picture tube

Publications (1)

Publication Number Publication Date
JPS5790849A true JPS5790849A (en) 1982-06-05

Family

ID=15835708

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16667980A Pending JPS5790849A (en) 1980-11-28 1980-11-28 Color picture tube

Country Status (1)

Country Link
JP (1) JPS5790849A (en)

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