GB1474756A - Display apparatus - Google Patents
Display apparatusInfo
- Publication number
- GB1474756A GB1474756A GB3472174A GB3472174A GB1474756A GB 1474756 A GB1474756 A GB 1474756A GB 3472174 A GB3472174 A GB 3472174A GB 3472174 A GB3472174 A GB 3472174A GB 1474756 A GB1474756 A GB 1474756A
- Authority
- GB
- United Kingdom
- Prior art keywords
- output
- character
- display
- row
- dot
- 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.)
- Expired
Links
- 230000000007 visual effect Effects 0.000 abstract 2
- 239000011159 matrix material Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G1/00—Control arrangements or circuits, of interest only in connection with cathode-ray tube indicators; General aspects or details, e.g. selection emphasis on particular characters, dashed line or dotted line generation; Preprocessing of data
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/34—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators for rolling or scrolling
- G09G5/343—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators for rolling or scrolling for systems having a character code-mapped display memory
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Controls And Circuits For Display Device (AREA)
Abstract
1474756 Cathode-ray tube displays TELETYPE CORP 7 Aug 1974 [13 Aug 1974] 34721/74 Heading H4T In a cathode-ray tube character display system in which a memory, which stores character display data, has a capacity exceeding the display capacity of the tube screen, address means selects for display a segment of the stored data and means responsive to the address means causes a visual indication representative of the selected segment to be displayed. Thus, when the display is "scrolled" vertically over the screen (upwardly or downwardly) the operator is provided with a visual indicator related to the particular portion of the total stored data being displayed. The described embodiment is concerned with a display system in which the tube screen is capable of displaying only a total of twenty-four rows of characters but in which the memory stores display data for seventy-two rows of characters. The first, twenty fifth and forty ninth rows which are the first rows of three respective segments each of twenty four rows are therefore visually identified on the display. The characters are produced in a 7 Î 9 dot matrix form within a character space of 9 x 14 dot position as shown in Fig. 1 in respect of the character E by means of the circuitry of Fig. 1 and Fig. 2. In general this circuitry operates to intensity modulate the tube beam under the control of the output 63 of a Dot Generator 28 at positions determined by a Parallel To Serial Shift Register 62 responsive to the output of a Font Decoder 56 receiving character data from a Random Access Memory 20 the actual character line being displayed being determined by a Memory Address Row Counter 66 operator controlled via a Scroll Counter 78. The horizontal trace period occupies the time (as determined by dot generator 28) of display of eighty characters and a twenty character interval is allowed for horizontal re-trace. During the retrace period a ninetynine count AND gate 40 responsive to the count nine outputs of two serial connected divide by ten circuits in a Scan Character Counter 32 supplies an output on line 108 (equivalent to a beam position at the far left-hand side of the screen and beyond the normal display area) which output conditions AND gates 102, 104 and 106 to supply outputs on the simultaneous occurrence of certain scan line (from Scan Line Decoder 110) and character row numbers. The row numbers are derived from a Row Decoder 88 which supplies row one and row twenty five outputs to respective OR gates 96, 98 and row forty nine output to both OR gates. Thus, during the simultaneous occurrence of a row 1 address output, a scan line 6 output and the ninety nine output, AND gate 106 supplies an output to OR gate 118 which via diodes 120, 122 causes bright-up pulses at line 6 and columns 6 and 7 at which position the scan is non-linear so that the dots illuminated by the pulses merge to produce a single elongated dot as shown at 10, Fig. 1, which dot is indicative of the first segment stored in the memory 20. In a similar manner dots 12, 12 indicate the second segment and dots 14, 14, 14, indicate the third segment are produced.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00388296A US3827041A (en) | 1973-08-14 | 1973-08-14 | Display apparatus with visual segment indicia |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1474756A true GB1474756A (en) | 1977-05-25 |
Family
ID=23533528
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3472174A Expired GB1474756A (en) | 1973-08-14 | 1974-08-07 | Display apparatus |
Country Status (4)
Country | Link |
---|---|
US (1) | US3827041A (en) |
CA (1) | CA1027269A (en) |
GB (1) | GB1474756A (en) |
IT (1) | IT1018964B (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5171743A (en) * | 1974-12-14 | 1976-06-21 | Teletype Corp | DEISUPURE ISOCHI |
USRE31200F1 (en) * | 1976-01-19 | 1990-05-29 | Raster scan display apparatus for dynamically viewing image elements stored in a random access memory array | |
US4158837A (en) * | 1977-05-17 | 1979-06-19 | International Business Machines Corporation | Information display apparatus |
US4169262A (en) * | 1977-11-17 | 1979-09-25 | Intel Corporation | Video display circuit for games, or the like |
US4368466A (en) * | 1980-11-20 | 1983-01-11 | International Business Machines Corporation | Display refresh memory with variable line start addressing |
DE3239842A1 (en) * | 1982-10-27 | 1984-05-03 | Siemens AG, 1000 Berlin und 8000 München | ARRANGEMENT FOR PRESENTING TEXTS |
US5574508A (en) * | 1994-11-02 | 1996-11-12 | Rca Thomson Licensing Corporation | Vertical panning for interlaced video |
EP1952756A1 (en) * | 2007-01-31 | 2008-08-06 | F.Hoffmann-La Roche Ag | Data processing device for processing readings from a blood sugar measurement device |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3082294A (en) * | 1960-05-10 | 1963-03-19 | Dean James Carroll | Moving window display system |
US3242470A (en) * | 1962-08-21 | 1966-03-22 | Bell Telephone Labor Inc | Automation of telephone information service |
US3422420A (en) * | 1966-03-23 | 1969-01-14 | Rca Corp | Display systems |
US3524182A (en) * | 1966-06-13 | 1970-08-11 | Ibm | Display system |
US3643252A (en) * | 1967-08-01 | 1972-02-15 | Ultronic Systems Corp | Video display apparatus |
US3610902A (en) * | 1968-10-07 | 1971-10-05 | Ibm | Electronic statistical calculator and display system |
DE1952175C3 (en) * | 1968-10-23 | 1978-06-15 | Ing. C. Olivetti & C., S.P.A., Ivrea, Turin (Italien) | Control arrangement for the display of data characters in tabular form |
US3706075A (en) * | 1970-05-14 | 1972-12-12 | Harris Intertype Corp | Apparatus for editing and correcting displayed text |
US3680077A (en) * | 1970-07-31 | 1972-07-25 | Ibm | Method of scrolling information displayed on cathode ray tube |
US3676850A (en) * | 1971-02-11 | 1972-07-11 | Columbia Broadcasting Syst Inc | Video display system |
US3683359A (en) * | 1971-04-30 | 1972-08-08 | Delta Data Syst | Video display terminal with automatic paging |
US3742482A (en) * | 1971-09-08 | 1973-06-26 | Bunker Ramo | Method and apparatus for generating a traveling display |
-
1973
- 1973-08-14 US US00388296A patent/US3827041A/en not_active Expired - Lifetime
-
1974
- 1974-03-08 CA CA194,500A patent/CA1027269A/en not_active Expired
- 1974-08-07 GB GB3472174A patent/GB1474756A/en not_active Expired
- 1974-08-13 IT IT52599/74A patent/IT1018964B/en active
Also Published As
Publication number | Publication date |
---|---|
CA1027269A (en) | 1978-02-28 |
IT1018964B (en) | 1977-10-20 |
US3827041A (en) | 1974-07-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |