Patent US1972861A successfully refreshed from Google Patents.
Patent US3631457A successfully refreshed from Google Patents.
US3631457A
Expired / Lapsed
US
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Display apparatus
Assignee: Hitachi Ltd
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Filing: 1969-09-08
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Granted: 1971-12-28
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Expires: 1989-09-08
Abstract
Abstract A display apparatus having a keyboard for encoding elements for the display of various characters, symbols or graphs by the combination of dots on a cathode ray tube operated in accordance with the standard television system, and MOS (Metal Oxide Semiconductor) dynamic shift registers for storing the codes representing the characters, symbols on graphs to be displayed. A video signal according to the codes applies intensity modulation to the scanning lines or rasters thereby to effect the desired display on the cathode ray tube. Renewal of displayed character can be effected by displaying a cursor at a renewed position on the cathode ray tube and manipulating the keyboard.
Inventors
- 👤 Nagaharu Hamada
- 👤 Motosi Miyanaka
- 👤 Yasuo Suzuki
- 👤 Isao Yasuda
- 👤 Yukitaka Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:18
CPC Classifications
G; G09; G09G; G09G5/00; G09G5/08; G09G5/22; G09G5/222
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
222 words
A display apparatus comprising means for supplying information-representing characters to be displayed, memory means for storing said information to be displayed, memory control means for controlling the storage and rewrite of the information in said memory means, character-generating means for generating signals representing chAracters corresponding to the contents of said memory means, cathode-ray tube display means for displaying a character depending on the output from said charactergenerating means, said display means being provided with a deflection system and a deflection control system corresponding to that of the standard commercial television receiver, and a basic control circuit having an oscillator generating a specific frequency for applying control signals to said memory control means and character-generating means with a predetermined timing, said memory means comprising a number of component memory means equal to the number of bits forming characters to be displayed, said components memory means being connected in parallel and each component memory means comprising first and second circulating memories connected in cascade, said first circulating memory containing information for one horizontal sweep in a line of the display, said second circulating memory containing information for the remaining lines of the display, the output of said first circulating memory being connected to said character-generating means in control thereof, said memory control means including means for separately controlling said first and second circulating memories.
Claim 2
Dependent Claim
222 words
A display apparatus comprising means for supplying information-representing characters to be displayed, memory means for storing said information to be displayed, memory control means for controlling the storage and rewrite of the information in said memory means, character-generating means for generating signals representing chAracters corresponding to the contents of said memory means, cathode-ray tube display means for displaying a character depending on the output from said charactergenerating means, said display means being provided with a deflection system and a deflection control system corresponding to that of the standard commercial television receiver, and a basic control circuit having an oscillator generating a specific frequency for applying control signals to said memory control means and character-generating means with a predetermined timing, said memory means comprising a number of component memory means equal to the number of bits forming characters to be displayed, said components memory means being connected in parallel and each component memory means comprising first and second circulating memories connected in cascade, said first circulating memory containing information for one horizontal sweep in a line of the display, said second circulating memory containing information for the remaining lines of the display, the output of said first circulating memory being connected to said character-generating means in control thereof, said memory control means including means for separately controlling said first and second circulating memories.
Claim 3
Dependent Claim
28 words
A display apparatus as claimed in claim 1, in which said second circulating memory is divided into a plurality of blocks which are controlled by separate pulse trains.
Claim 4
Dependent Claim
38 words
A display apparatus as claimed in claim 1, in which there is provided at least one pattern-generating circuit for generating preselected pattern elements and means for switching connections between said character generating circuit and said pattern generating circuit.
Claim 5
Dependent Claim
47 words
A display apparatus as claimed in claim 1, in which there are provided further memory means for preselected pattern elements, which are interconnected with the remaining means in the apparatus so as to allow a parallel operation with the first-mentioned memory means for the information of characters.
Claim 6
Dependent Claim
69 words
A display apparatus as claimed in claim 1, further including means for controlling and detecting the position of a cursor which means includes means for producing an output at a time earlier by predetermined bit time than the time when the cursor actually appears, and means responsive to said output for writing an external signal into said memory means at the address corresponding to the position of said cursor.
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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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |