JPS55163989A - Digital convergence unit - Google Patents
Digital convergence unitInfo
- Publication number
- JPS55163989A JPS55163989A JP7208179A JP7208179A JPS55163989A JP S55163989 A JPS55163989 A JP S55163989A JP 7208179 A JP7208179 A JP 7208179A JP 7208179 A JP7208179 A JP 7208179A JP S55163989 A JPS55163989 A JP S55163989A
- Authority
- JP
- Japan
- Prior art keywords
- screen
- rom
- written
- order bits
- adjustment
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- General Health & Medical Sciences (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
PURPOSE:To save memory capacity while shortening the time of an adjustment by storing correction values of respective adjustment points on crosses on a screen and/ or corner parts. CONSTITUTION:One-frame memory 31 consists of ROM and nonvolatile RAM; and high-order bits of correction data regarding respective adjustment points on crosses on a screen are written in ROM while low-order bits are written in RAM and those data are repeatedly read out. For fine adjustments, correction data of low-order bits are written via data reversible counter 34 by correcting the value of RAM. Next, the contents of memory 31 are read out and after interpolated, D/A-converted 9 to lead out convergence signals via LPF10. Thus, the adjustment time is shortened and ROM is repeatedly read to find the correction value of another adjustment point, so that the memory capacity can be saved. Further, corrections of high precision can be made covering the entire screen by writing correction value of screen corner parts.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7208179A JPS55163989A (en) | 1979-06-07 | 1979-06-07 | Digital convergence unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7208179A JPS55163989A (en) | 1979-06-07 | 1979-06-07 | Digital convergence unit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55163989A true JPS55163989A (en) | 1980-12-20 |
JPS6412437B2 JPS6412437B2 (en) | 1989-02-28 |
Family
ID=13479097
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7208179A Granted JPS55163989A (en) | 1979-06-07 | 1979-06-07 | Digital convergence unit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55163989A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57155889A (en) * | 1981-03-20 | 1982-09-27 | Matsushita Electric Ind Co Ltd | Digital convergence device |
EP0068420A2 (en) * | 1981-06-24 | 1983-01-05 | Hitachi, Ltd. | Convergence distortion correction method and apparatus for color cathode-ray tube |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52122417A (en) * | 1976-04-07 | 1977-10-14 | Mitsubishi Electric Corp | Convergence unit |
JPS5453919A (en) * | 1977-09-15 | 1979-04-27 | Ibm | Method of generating correction factor signal for crt |
-
1979
- 1979-06-07 JP JP7208179A patent/JPS55163989A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52122417A (en) * | 1976-04-07 | 1977-10-14 | Mitsubishi Electric Corp | Convergence unit |
JPS5453919A (en) * | 1977-09-15 | 1979-04-27 | Ibm | Method of generating correction factor signal for crt |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57155889A (en) * | 1981-03-20 | 1982-09-27 | Matsushita Electric Ind Co Ltd | Digital convergence device |
EP0068420A2 (en) * | 1981-06-24 | 1983-01-05 | Hitachi, Ltd. | Convergence distortion correction method and apparatus for color cathode-ray tube |
Also Published As
Publication number | Publication date |
---|---|
JPS6412437B2 (en) | 1989-02-28 |
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