JPS5798959A - Projection type television device - Google Patents

Projection type television device

Info

Publication number
JPS5798959A
JPS5798959A JP55173265A JP17326580A JPS5798959A JP S5798959 A JPS5798959 A JP S5798959A JP 55173265 A JP55173265 A JP 55173265A JP 17326580 A JP17326580 A JP 17326580A JP S5798959 A JPS5798959 A JP S5798959A
Authority
JP
Japan
Prior art keywords
trapezoidal distortion
screen
center
phosphor face
deflection yoke
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
JP55173265A
Other languages
Japanese (ja)
Inventor
Noritaka Okuyama
Toshiharu Shimizu
Shuzo Matsumoto
Yoshiichi Naito
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55173265A priority Critical patent/JPS5798959A/en
Publication of JPS5798959A publication Critical patent/JPS5798959A/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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only

Landscapes

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

Abstract

PURPOSE:To correct the trapezoidal distortion on the screen by bringing the electron beam from a projection tube to the position departed from the center of the phosphor face by the predetermined distance while arranging the lens in correspondence to the distance of the beam movement. CONSTITUTION:A beam bender 10 is provided between an electron gun 9 and a deflection yoke 7 for producing the horizontal deflection field of pin-cushion shape and the vertical deflection field of barrel shape in a projection tube 1R, to bend the locus such that the electron beam 13 will reach to the position P shifted by the distance (d) from the center 0 of the phosphor face 11 even when the current is not flowing through the deflection yoke 7 thus to correspond the center of a lens 2R with point P on the phosphor face thus to produce the picture image on the screen. Consequently strong trapezoidal distortion can be produced on the phosphor face 11, thereby the trapezoidal distortion of the picture image produced on the screen can be corrected sufficiently without requiring the sub-deflection yoke or a trapezoidal distortion correcting circuit.
JP55173265A 1980-12-10 1980-12-10 Projection type television device Pending JPS5798959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55173265A JPS5798959A (en) 1980-12-10 1980-12-10 Projection type television device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55173265A JPS5798959A (en) 1980-12-10 1980-12-10 Projection type television device

Publications (1)

Publication Number Publication Date
JPS5798959A true JPS5798959A (en) 1982-06-19

Family

ID=15957235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55173265A Pending JPS5798959A (en) 1980-12-10 1980-12-10 Projection type television device

Country Status (1)

Country Link
JP (1) JPS5798959A (en)

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