US4090260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital image memory adapted to distribute image blanks
Assignee: Alcatel CIT SA
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Filing: 1976-06-25
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Granted: 1978-05-16
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Expires: 1996-06-25
Abstract
Abstract The invention comes within the domain of synthetic images on a cathode scn and concerns a digital memory whose contents are cyclically read to constitute an image on the screen. The memory is divided into blocks each of which contains the data of a part of the image and which are cyclically controlled in such a way that within a line of the image, the blocks are read successively, whereas at the end of a line, a block is skipped. Thus, possible blanks in the image due to the breakdown of one of the blocks are distributed over the image and no longer erase a vertical column of the image.
Inventors
- 👤 Dusan Sinobad
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:23
CPC Classifications
G; G11; G11C; G11C29/00; G11C29/70; G11C29/88; G09; G09G; G09G5/00; G09G5/36; G09G5/39; G09G5/395
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
116 words
A digital memory for an image to be displayed by systematic point by point and line by line scanning of a television type screen, the memory being comprised of N blocks, each block containing data for the image, an address counter and a read out register connected to said memory, said address counter receiving clock pulses for synchronizing a read out operation of the memory to a writing operation on the screen, to thereby extract display data successively from all the memory blocks, said address counter receiving an additional counting pulse every time a full line has been written on the screen, said blocks being read cyclically so that successive read out operations concern different blocks.
Claim 2
Dependent Claim
116 words
A digital memory for an image to be displayed by systematic point by point and line by line scanning of a television type screen, the memory being comprised of N blocks, each block containing data for the image, an address counter and a read out register connected to said memory, said address counter receiving clock pulses for synchronizing a read out operation of the memory to a writing operation on the screen, to thereby extract display data successively from all the memory blocks, said address counter receiving an additional counting pulse every time a full line has been written on the screen, said blocks being read cyclically so that successive read out operations concern different blocks.
Claim 3
Dependent Claim
27 words
A memory according to claim 1, wherein N is a submultiple of the number of elementary read out operations necessary to comprise a line of the image.
References Cited (Backward Citations)
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Cited
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Cited
US3889244A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-15 | 1981-11-14 | 1982-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-15 | 1985-11-14 | 1986-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-15 | 1989-11-14 | 1990-05-16 | $7700.00 | Window Closed / Lapsed |