JPS55163989A - Digital convergence unit - Google Patents

Digital convergence unit

Info

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
Application number
JP7208179A
Other languages
Japanese (ja)
Other versions
JPS6412437B2 (en
Inventor
Taro Kawamoto
Tokuji Kubo
Susumu Tsujihara
Katsumi Morita
Kunihiko Mototani
Katsumi Mitsuda
Minoru Takeda
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.)
Japan Broadcasting Corp
Panasonic Holdings Corp
Original Assignee
Nippon Hoso Kyokai NHK
Japan Broadcasting Corp
Matsushita Electric Industrial Co 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 Nippon Hoso Kyokai NHK, Japan Broadcasting Corp, Matsushita Electric Industrial Co Ltd filed Critical Nippon Hoso Kyokai NHK
Priority to JP7208179A priority Critical patent/JPS55163989A/en
Publication of JPS55163989A publication Critical patent/JPS55163989A/en
Publication of JPS6412437B2 publication Critical patent/JPS6412437B2/ja
Granted legal-status Critical Current

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.
JP7208179A 1979-06-07 1979-06-07 Digital convergence unit Granted JPS55163989A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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