Patent US3623005A successfully refreshed from Google Patents.
US3623005A
Expired / Lapsed
US
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Video display apparatus employing a combination of recirculating buffers
Assignee: Ultronic Systems Corp
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Filing: 1970-01-20
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Granted: 1971-11-23
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Expires: 1990-01-20
Abstract
Abstract Coded characters from a plurality of input sources are stored in different intervals of a recirculating memory, each interval containing the characters for a row of the display. Characters for a display row are loaded into buffer register means which is then recirculated and the contents encoded during successive recirculations to produce signals representing the portions of the characters to be displayed on respective lines of the display row. Information from one source is displayed in a plurality of rows which are upshifted to rows thereabove and new information displayed in the bottom row, by delaying the vertical sweep relative to said encoding during upshift. Information from another source is displayed in rows which do not upshift, by delaying the decoding so that it remains unchanged with respect to the vertical sweep.
Inventors
- 👤 Richardson S Roberts Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:49
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/34; G09G5/343; G09G1/00; G09G1/007
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
Apparatus for receiving, storing, releasing and recirculating information in the form of coded electrical signals, each signal having a designated number of bits and representing a predetermined character, said apparatus comprising: an input section having a first input to which new information is supplied in serial bit form; first means coupled to said input section to combine said new information into a single train of signals in which the serial bit formed is retained; a first information storage unit responsive to said train of signals to recirculate said train therein at a first selected rate; second means responsive to the recirculated train of signals to convert same into bit-parallel, serial-character form whereby a plurality of synchronized signal trains equal to the number of bits per character is formed; and a second information storage unit responsive to said synchronized signal trains to recirculate therein all of same at a second selected rate synchronous with said first selected rate and without impairing relative time relationships among these synchronized train, said second unit having an output at which said plurality of trains can be released from said second unit.
Claim 2
Dependent Claim
186 words
Apparatus for receiving, storing, releasing and recirculating information in the form of coded electrical signals, each signal having a designated number of bits and representing a predetermined character, said apparatus comprising: an input section having a first input to which new information is supplied in serial bit form; first means coupled to said input section to combine said new information into a single train of signals in which the serial bit formed is retained; a first information storage unit responsive to said train of signals to recirculate said train therein at a first selected rate; second means responsive to the recirculated train of signals to convert same into bit-parallel, serial-character form whereby a plurality of synchronized signal trains equal to the number of bits per character is formed; and a second information storage unit responsive to said synchronized signal trains to recirculate therein all of same at a second selected rate synchronous with said first selected rate and without impairing relative time relationships among these synchronized train, said second unit having an output at which said plurality of trains can be released from said second unit.
Claim 3
Dependent Claim
20 words
Apparatus as set forth in claim 1 including third means to selectively eliminate selected characters recirculating in said first unit.
Claim 4
Dependent Claim
44 words
Apparatus as set forth in claim 2 wherein said input section is provided with a second input to which recirculated information is supplied in serial bit form, and wherein said first means combines said new information with said recirculating information into said signal train.
Claim 5
Dependent Claim
29 words
Apparatus as set forth in claim 3 further including fourth means coupled to said output to reassemble said synchronized signal trains into a single train in serial bit form.
Claim 6
Dependent Claim
37 words
Apparatus as set forth in claim 4 further including fifth means coupled between said fourth means and said second input to feedback said single train in serial bit form with controllable time delay to said second input.
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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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |