CA2072191A1 - Display apparatus - Google Patents
Display apparatusInfo
- Publication number
- CA2072191A1 CA2072191A1 CA 2072191 CA2072191A CA2072191A1 CA 2072191 A1 CA2072191 A1 CA 2072191A1 CA 2072191 CA2072191 CA 2072191 CA 2072191 A CA2072191 A CA 2072191A CA 2072191 A1 CA2072191 A1 CA 2072191A1
- Authority
- CA
- Canada
- Prior art keywords
- electron beam
- signals
- beam shaped
- crt
- display apparatus
- 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.)
- Granted
Links
- 238000010894 electron beam technology Methods 0.000 abstract 4
- 238000001514 detection method Methods 0.000 abstract 2
- 230000001133 acceleration Effects 0.000 abstract 1
- 201000009310 astigmatism Diseases 0.000 abstract 1
- 239000002131 composite material Substances 0.000 abstract 1
Landscapes
- Details Of Television Scanning (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
A display apparatus in which the focus shift and astigmatism of the electron beam caused in the CRT and its vicinity portion are reduced. Picture scenes of higher fidelity, higher acuteness and higher resolution can be obtained. In the electron beam shaped control circuit, signals corresponding to a high-pass component, a brightness component in the image signals from the horizontal direction electron beam shaped detection deciding portion, and signals corresponding to the low-pass component in the image signals from the vertical direction electron beam shaped detection deciding portion are composed. Composite signals of parabolic waves are obtained by a driving voltage generating portion so as to apply the output to the auxiliary acceleration focusing electrode of the CRT.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3154437A JP2822694B2 (en) | 1991-06-26 | 1991-06-26 | Display device |
JP3-154437 | 1991-06-26 | ||
JP3-336537 | 1991-12-19 | ||
JP3336537A JP3057864B2 (en) | 1991-12-19 | 1991-12-19 | Display device |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2072191A1 true CA2072191A1 (en) | 1992-12-27 |
CA2072191C CA2072191C (en) | 1999-01-12 |
Family
ID=26482715
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA 2072191 Expired - Fee Related CA2072191C (en) | 1991-06-26 | 1992-06-23 | Display apparatus |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA2072191C (en) |
-
1992
- 1992-06-23 CA CA 2072191 patent/CA2072191C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CA2072191C (en) | 1999-01-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |