JPS56152140A - Color cathode ray tube - Google Patents

Color cathode ray tube

Info

Publication number
JPS56152140A
JPS56152140A JP5664780A JP5664780A JPS56152140A JP S56152140 A JPS56152140 A JP S56152140A JP 5664780 A JP5664780 A JP 5664780A JP 5664780 A JP5664780 A JP 5664780A JP S56152140 A JPS56152140 A JP S56152140A
Authority
JP
Japan
Prior art keywords
ray tube
cathode ray
shadow mask
color cathode
carbon
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
JP5664780A
Other languages
Japanese (ja)
Other versions
JPS6043621B2 (en
Inventor
Tetsuya Watanabe
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 JP5664780A priority Critical patent/JPS6043621B2/en
Publication of JPS56152140A publication Critical patent/JPS56152140A/en
Publication of JPS6043621B2 publication Critical patent/JPS6043621B2/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
    • H01J29/07—Shadow masks for colour television tubes

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)

Abstract

PURPOSE:To decrease the thermal deformation of a color cathode ray tube and improve its picture quality by having nonmetallic impurities diffused over and included in the surface of a shadow mask, in order to reduce the coefficient of its thermal expansion. CONSTITUTION:The raw material (SPCE material) of a shadow mask provided with holes bored by photo etching is formed by pressing into a prescribed shape. Then, carbon is diffused on and included in the surface of the formed raw material of the shadow mask. Nitrogen or boron may be used as other impurities than carbon. Thereby, picture quality can be improved because the thermal expansion coefficient decreases from about 1.3X10<-5>/ deg.C to about 1.5X10<-5>/ deg.C, the thermal deformation of the mask is restrained color discrepancy, is prevented.
JP5664780A 1980-04-25 1980-04-25 color cathode ray tube Expired JPS6043621B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5664780A JPS6043621B2 (en) 1980-04-25 1980-04-25 color cathode ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5664780A JPS6043621B2 (en) 1980-04-25 1980-04-25 color cathode ray tube

Publications (2)

Publication Number Publication Date
JPS56152140A true JPS56152140A (en) 1981-11-25
JPS6043621B2 JPS6043621B2 (en) 1985-09-28

Family

ID=13033134

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5664780A Expired JPS6043621B2 (en) 1980-04-25 1980-04-25 color cathode ray tube

Country Status (1)

Country Link
JP (1) JPS6043621B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58186130A (en) * 1982-04-23 1983-10-31 Toshiba Corp Production method of color picture tube
JPS6054139A (en) * 1983-08-16 1985-03-28 Toshiba Corp Color picture tube
JPS6070642A (en) * 1983-09-27 1985-04-22 Mitsubishi Electric Corp Shadow mask

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58186130A (en) * 1982-04-23 1983-10-31 Toshiba Corp Production method of color picture tube
JPS6054139A (en) * 1983-08-16 1985-03-28 Toshiba Corp Color picture tube
JPS6070642A (en) * 1983-09-27 1985-04-22 Mitsubishi Electric Corp Shadow mask

Also Published As

Publication number Publication date
JPS6043621B2 (en) 1985-09-28

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