JPS54137919A - Projection television unit - Google Patents

Projection television unit

Info

Publication number
JPS54137919A
JPS54137919A JP4629878A JP4629878A JPS54137919A JP S54137919 A JPS54137919 A JP S54137919A JP 4629878 A JP4629878 A JP 4629878A JP 4629878 A JP4629878 A JP 4629878A JP S54137919 A JPS54137919 A JP S54137919A
Authority
JP
Japan
Prior art keywords
scanning
electron
brightness
screen
picture
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
JP4629878A
Other languages
Japanese (ja)
Inventor
Matsuo Ochi
Taiichi Saeki
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4629878A priority Critical patent/JPS54137919A/en
Publication of JPS54137919A publication Critical patent/JPS54137919A/en
Pending legal-status Critical Current

Links

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

PURPOSE: To increase the brightness of a picture with the brightness of a blue CRT increased by increasing the scan area on a screen by elongating scanning-beam spot in the horizontal direction by changing the constitution of an electromagnetic focusing unit used for the blue CRT.
CONSTITUTION: This unit is equipped with an electron gun, an electron-beam focusing part including electromagnetic focusing unit 12, three red, green and bule CRTs which have electron-beam scanning deflection parts and are equipped with pattern reproduction surfaces by an electron beam, and a screen which composes a tri-color picture projected from three CRTs. Then, electromagnetic focusing unit 10 using a permanent magent inserted into neck part 1 of the blue CRT is provided with identically-shaped magnetic substances 11 perpendicularly to the scanning direction of a scanning beam, so as to make uneven the intensity valus of magnetic fields parallel and perpendicular to the scanning direction of the scanning beam. Then, the brightness of a picture is increased by increasing the scan area on the screen.
COPYRIGHT: (C)1979,JPO&Japio
JP4629878A 1978-04-18 1978-04-18 Projection television unit Pending JPS54137919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4629878A JPS54137919A (en) 1978-04-18 1978-04-18 Projection television unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4629878A JPS54137919A (en) 1978-04-18 1978-04-18 Projection television unit

Publications (1)

Publication Number Publication Date
JPS54137919A true JPS54137919A (en) 1979-10-26

Family

ID=12743294

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4629878A Pending JPS54137919A (en) 1978-04-18 1978-04-18 Projection television unit

Country Status (1)

Country Link
JP (1) JPS54137919A (en)

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