JPS5455366A - Color cathode-ray tube - Google Patents

Color cathode-ray tube

Info

Publication number
JPS5455366A
JPS5455366A JP12186377A JP12186377A JPS5455366A JP S5455366 A JPS5455366 A JP S5455366A JP 12186377 A JP12186377 A JP 12186377A JP 12186377 A JP12186377 A JP 12186377A JP S5455366 A JPS5455366 A JP S5455366A
Authority
JP
Japan
Prior art keywords
mask
effective diameter
shadow mask
outside
ray tube
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
JP12186377A
Other languages
Japanese (ja)
Inventor
Takafumi Koga
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 JP12186377A priority Critical patent/JPS5455366A/en
Publication of JPS5455366A publication Critical patent/JPS5455366A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrodes For Cathode-Ray Tubes (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)

Abstract

PURPOSE: To reduce the thermal deformation of a shadow mask caused by striking electron beams, by providing several apertures partially or entirely to a circumference outside from the effective diameter of the shadow mask confronting to a fluorescent screen.
CONSTITUTION: The effective diameter of shadow mask 21 should be within line 22; this part is provided with several through holes in a fixed pattern and the entire or partial circumference 23 outside the effective diameter is provided with several apertures 24. This shadow mask is welded to mask frame 25 at its flank and the panel-mask building-in is done. Through fixed processes mentioned above, a fluorescent screen is formed, a funnel is sealed, and an electron gun is arranged and sealed, thereby completing a cathode-ray tube. In this way, apertures are provided to the circumferential part outside from the effective diameter of the mask. As a result, the mechanical strength of this part improves, strength becomes uniform over the entire mask, and even if an electron beam strikes during the operation, the mask will not deform abnormally due to thermal expansion, so that an excellent picture can be obtained
COPYRIGHT: (C)1979,JPO&Japio
JP12186377A 1977-10-13 1977-10-13 Color cathode-ray tube Pending JPS5455366A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12186377A JPS5455366A (en) 1977-10-13 1977-10-13 Color cathode-ray tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12186377A JPS5455366A (en) 1977-10-13 1977-10-13 Color cathode-ray tube

Publications (1)

Publication Number Publication Date
JPS5455366A true JPS5455366A (en) 1979-05-02

Family

ID=14821785

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12186377A Pending JPS5455366A (en) 1977-10-13 1977-10-13 Color cathode-ray tube

Country Status (1)

Country Link
JP (1) JPS5455366A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039740A (en) * 1983-08-11 1985-03-01 Mitsubishi Electric Corp shadow mask

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039740A (en) * 1983-08-11 1985-03-01 Mitsubishi Electric Corp shadow mask

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