JPS54106118A - Image display device - Google Patents
Image display deviceInfo
- 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
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
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) |
-
1978
- 1978-02-08 JP JP1247778A patent/JPS54106118A/en active Pending
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