JPS54106118A - Image display device - Google Patents

Image display device

Info

Publication number
JPS54106118A
JPS54106118A JP1247778A JP1247778A JPS54106118A JP S54106118 A JPS54106118 A JP S54106118A JP 1247778 A JP1247778 A JP 1247778A JP 1247778 A JP1247778 A JP 1247778A JP S54106118 A JPS54106118 A JP S54106118A
Authority
JP
Japan
Prior art keywords
coil
astigmatic correction
supplied
diagonal
lens
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
JP1247778A
Other languages
Japanese (ja)
Inventor
Osamu Yamada
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 JP1247778A priority Critical patent/JPS54106118A/en
Publication of JPS54106118A publication Critical patent/JPS54106118A/en
Pending legal-status Critical Current

Links

Landscapes

  • Details Of Television Scanning (AREA)

Abstract

PURPOSE: To obtain an image which is completely free from distortion for the device which displays the picture and the like on the fluorescent film of CRT by securing the minimum distortion by adjusting both the direction and the intensity of the permanent magnet and without using any special deflecting coil.
CONSTITUTION: Electonic lens 3 is provided to condense the electron beams radiated from the electronic gun, along with deflecting coil 2 which deflects the electron beam in the horizontal and vertical directions respectively. Thus, the characters, images and the like are displayed on the fluorescent film of CRT10. In such image display device, horizontal/vertical astigmatic correction coil 4 and diagonal astigmatic correction coil 5 are distributed around the electron beam path between the electronic gun and lens 3 so that the angular difference of about 45° can be secured. And astigmatic correction current IS1 to be supplied to coil 4 and diagonal astigmatic correction current IS2 to be supplied to coil 5 are made variable with the function relation shown in Eq. I and II and then set to astigmatic correction coil driving power source 9 to be supplied to coil 4 and 5 each.
COPYRIGHT: (C)1979,JPO&Japio
JP1247778A 1978-02-08 1978-02-08 Image display device Pending JPS54106118A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1247778A JPS54106118A (en) 1978-02-08 1978-02-08 Image display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1247778A JPS54106118A (en) 1978-02-08 1978-02-08 Image display device

Publications (1)

Publication Number Publication Date
JPS54106118A true JPS54106118A (en) 1979-08-20

Family

ID=11806454

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1247778A Pending JPS54106118A (en) 1978-02-08 1978-02-08 Image display device

Country Status (1)

Country Link
JP (1) JPS54106118A (en)

Similar Documents

Publication Publication Date Title
ES8801073A1 (en) Raster distortion correction for a video display apparatus, such as one including a "square planar" picture tube.
SE8600991L (en) DEVICE FOR REDUCING MAGNETIC FIELD STRENGTH NEAR APPLIANCES WITH CATHODIC RADIATORS WITH MAGNETIC DEFENSE
ES478053A1 (en) Display tube for displaying color pictures
US2944174A (en) Electronic image system and method
ES487233A1 (en) Magnetic electron lens for cathode-ray tube.
ES461806A1 (en) Correcting television displays
JPS54106118A (en) Image display device
DE69114313T2 (en) Electron beam tube with curved picture window and color picture display device.
US3457365A (en) High resolution television projection system
ES8407244A1 (en) Device for displaying television pictures and deflection unit therefor.
Castleberry et al. An improved vidicon focusing-deflecting unit
GB1254064A (en) Electron beam correction apparatus for a color picture tube
JPS554869A (en) Deflection yoke assembly for camera tube
ES402606A1 (en) Television display apparatus employing convergence correction
JPS5527781A (en) Magnetic beam adjustment method
JPS563949A (en) Color picture tube device
GB2217959A (en) Reducing stray magnetic fields from display devices
JPS56126383A (en) Television projecting device
JPS551186A (en) Electron beam exposure apparatus
JPS545373A (en) Projection-type cathode-ray tube
KR950010908B1 (en) Fluorescent film forming device and method thereof of color cathode ray tube
US4378516A (en) Pincushion correction in a dual deflection CRT system
SE8300916L (en) PICTURES AND A PRESENTATION PLAYER FOR FERGER PICTURES WITH MULTIPLE FERGER
JPS5318916A (en) Cathode-ray tube
JPS5342672A (en) Color picture receiving tube device