GB1461559A - Graphic display device - Google Patents

Graphic display device

Info

Publication number
GB1461559A
GB1461559A GB1892175A GB1892175A GB1461559A GB 1461559 A GB1461559 A GB 1461559A GB 1892175 A GB1892175 A GB 1892175A GB 1892175 A GB1892175 A GB 1892175A GB 1461559 A GB1461559 A GB 1461559A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
addresses
pattern generator
memory
cathode
data
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
GB1892175A
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.)
Yokogawa Electric Corp
Original Assignee
Yokogawa Electric Corp
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

Links

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/22Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of characters or indicia using display control signals derived from coded signals representing the characters or indicia, e.g. with a character-code memory
    • G09G5/222Control of the character-code memory
    • G09G5/225Control of the character-code memory comprising a loadable character generator

Abstract

1461559 Cathode-ray tube displays YOKOGAWA ELECTRIC WORKS Ltd 6 May 1975 18921/75 Heading H4T In a cathode-ray tube graphic display system a pattern generator (e.g. alphanumeric characters, symbols etc) including a random access memory stores computer supplies video data at specified addresses which addresses are also stored in a refresh memory. To produce a display the data in the refresh memory is read out in sequence and addresses the pattern generator memory of the corresponding addresses to derive the appertaining video data which is then employed to produce the required patterns in dot-matrix form on a line scanned raster. With the arrangement the pattern generator needs to store data only for those characters actually being displayed and thereby requires only a comparatively small storage capacity. The "reading" and "uniting" functions operate on a time sharing multiplexing basis. An embodiment is described with reference to a block circuit diagram (Figs. 1a and 1b) and a timing waveform diagram set (Fig. 2) none shown.
GB1892175A 1975-05-06 1975-05-06 Graphic display device Expired GB1461559A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1892175A GB1461559A (en) 1975-05-06 1975-05-06 Graphic display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1892175A GB1461559A (en) 1975-05-06 1975-05-06 Graphic display device

Publications (1)

Publication Number Publication Date
GB1461559A true true GB1461559A (en) 1977-01-13

Family

ID=10120752

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1892175A Expired GB1461559A (en) 1975-05-06 1975-05-06 Graphic display device

Country Status (1)

Country Link
GB (1) GB1461559A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026266A2 (en) * 1979-09-27 1981-04-08 International Business Machines Corporation Digital data display system
EP0072708A2 (en) * 1981-08-19 1983-02-23 Fuji Xerox Co., Ltd. Printer
EP0121126A2 (en) * 1983-03-07 1984-10-10 International Business Machines Corporation Character generator
EP0139386A2 (en) * 1983-08-29 1985-05-02 Ing. C. Olivetti & C., S.p.A. Data processing apparatus with dot character generator
EP0513805A2 (en) * 1991-05-15 1992-11-19 Kabushiki Kaisha Toshiba Method and apparatus for controlling access of font data memory used in display control system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0026266A2 (en) * 1979-09-27 1981-04-08 International Business Machines Corporation Digital data display system
EP0026266A3 (en) * 1979-09-27 1982-03-31 International Business Machines Corporation Digital data display system
US4451825A (en) * 1979-09-27 1984-05-29 International Business Machine Corporation Digital data display system
EP0072708A2 (en) * 1981-08-19 1983-02-23 Fuji Xerox Co., Ltd. Printer
EP0072708A3 (en) * 1981-08-19 1983-03-09 Fuji Xerox Co., Ltd. Printer
EP0121126A2 (en) * 1983-03-07 1984-10-10 International Business Machines Corporation Character generator
EP0121126A3 (en) * 1983-03-07 1988-07-06 International Business Machines Corporation Character generator
EP0139386A2 (en) * 1983-08-29 1985-05-02 Ing. C. Olivetti & C., S.p.A. Data processing apparatus with dot character generator
EP0139386A3 (en) * 1983-08-29 1988-01-07 Ing. C. Olivetti & C., S.P.A. Data processing apparatus with dot character generator
EP0513805A2 (en) * 1991-05-15 1992-11-19 Kabushiki Kaisha Toshiba Method and apparatus for controlling access of font data memory used in display control system
EP0513805A3 (en) * 1991-05-15 1993-12-08 Toshiba Kk Method and apparatus for controlling access of font data memory used in display control system
US5619721A (en) * 1991-05-15 1997-04-08 Kabushiki Kaisha Toshiba Controlling font data memory access for display and non-display purposes using character content for access criteria

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years

Effective date: 19950505