GB1068775A - Cursive character generator - Google Patents

Cursive character generator

Info

Publication number
GB1068775A
GB1068775A GB43383/64A GB4338364A GB1068775A GB 1068775 A GB1068775 A GB 1068775A GB 43383/64 A GB43383/64 A GB 43383/64A GB 4338364 A GB4338364 A GB 4338364A GB 1068775 A GB1068775 A GB 1068775A
Authority
GB
United Kingdom
Prior art keywords
circuits
character
deflection
characters
fed
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
Application number
GB43383/64A
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.)
Raytheon Co
Original Assignee
Raytheon Co
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 Raytheon Co filed Critical Raytheon Co
Publication of GB1068775A publication Critical patent/GB1068775A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/26—Arbitrary function generators
    • 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
    • G09G1/06—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 using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows
    • G09G1/08—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 using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam directly tracing characters, the information to be displayed controlling the deflection and the intensity as a function of time in two spatial co-ordinates, e.g. according to a cartesian co-ordinate system
    • G09G1/10—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 using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam directly tracing characters, the information to be displayed controlling the deflection and the intensity as a function of time in two spatial co-ordinates, e.g. according to a cartesian co-ordinate system the deflection signals being produced by essentially digital means, e.g. incrementally
    • 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
    • G09G1/06—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 using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows
    • G09G1/08—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 using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam directly tracing characters, the information to be displayed controlling the deflection and the intensity as a function of time in two spatial co-ordinates, e.g. according to a cartesian co-ordinate system
    • G09G1/12—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 using single beam tubes, e.g. three-dimensional or perspective representation, rotation or translation of display pattern, hidden lines, shadows the beam directly tracing characters, the information to be displayed controlling the deflection and the intensity as a function of time in two spatial co-ordinates, e.g. according to a cartesian co-ordinate system the deflection signals being produced by essentially analogue means

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Software Systems (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

1,068,775. Cathode-ray tube displays. RAYTHEON CO. Oct. 23, 1964 [Nov. 19, 1963], No. 43383/64. Heading H4T. In an arrangement for deflecting the beam of a cathode-ray tube to trace Alpha-Numerio characters the X and Y co-ordinates of a plurality of segments forming the outlines of the latter are determined by a like plurality of weighting elements to which sequential pulses are applied selected weighted outputs being fed to the tube deflection circuits through smoothing circuits while results in the character being formed with smooth curved segments some of which are undesired and are blanked out. Fig. 5, shows one embodiment in which the weighting elements comprise resistor networks 72, 74, the networks for each character being fed with sequential pulses from a generator 70 and connected to respective switching circuits 84, 86 to enable the desired character to be selected. Outputs from circuits 84, 86 are then fed to operational amplifiers 94, 98 which supply the X and Y deflection amplifiers 158, 160 via filters 154, 156 which smooth the discrete segment signals. This obviates the need for wide-bandwidth deflection circuits by avoiding sharp corners in the tracing of the characters and results in the beam changing direction in a smooth curve loop which does not form part of the characters, such loop then being blanked out by means of pulses derived via network 76 and switching circuit 83 and applied to the tube intensity control electrode 166. The weighting of each resistor in the networks 72, 74 is so selected that the beam moves at uniform speed and thus produces a trace of uniform intensity. Instead of employing a separate resistor for each segment (e.g. 40) a smaller.number (e.g. 6) weighted in a binary code fashion may be employed. The various steps in the tracing of the letter " R " together with required deflection and blanking waveforms are described with reference to Figs. 1 to 4 (not shown). In a further embodiment (Fig. 6, not shown) the X and Y co-ordinates are determined by a diode character-selection matrix which selects appropriate combinations of pulses to provide binary coded signals for application to the filters 154, 156 (Fig. 1) via digital-to-analogue converters.
GB43383/64A 1963-11-19 1964-10-23 Cursive character generator Expired GB1068775A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US324707A US3417281A (en) 1963-11-19 1963-11-19 Cursive character generator

Publications (1)

Publication Number Publication Date
GB1068775A true GB1068775A (en) 1967-05-17

Family

ID=23264739

Family Applications (1)

Application Number Title Priority Date Filing Date
GB43383/64A Expired GB1068775A (en) 1963-11-19 1964-10-23 Cursive character generator

Country Status (5)

Country Link
US (1) US3417281A (en)
DE (1) DE1265463B (en)
GB (1) GB1068775A (en)
NL (1) NL6412148A (en)
SE (1) SE322076B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4810893B1 (en) * 1968-12-11 1973-04-09
US3696391A (en) * 1969-09-19 1972-10-03 Thomson Csf T Vt Sa System for the display of synthesized graphic symbols

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2766444A (en) * 1953-09-01 1956-10-09 Eugene H Sheftelman Electronic character displaying apparatus
NL198049A (en) * 1954-06-16
DE1036718B (en) * 1957-12-17 1958-08-14 Werk Signal Sicherungstech Veb Method of representing characters
US3161866A (en) * 1959-05-11 1964-12-15 Data Display Inc Cathode ray tube symbol display system having equal resistor postition control
GB919646A (en) * 1960-01-13 1963-02-27 Decca Ltd Improvements in or relating to cathode ray tube display systems
US3165729A (en) * 1961-07-24 1965-01-12 Robert L Richman Crt display system having logic circuits controlled by weighted resistors in the deflection circuitry
GB1040741A (en) * 1961-12-04 1966-09-01 Elliott Brothers London Ltd Fault alarm display systems

Also Published As

Publication number Publication date
SE322076B (en) 1970-03-23
NL6412148A (en) 1965-05-20
DE1265463B (en) 1968-04-04
US3417281A (en) 1968-12-17

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