GB1503362A - Digital raster display system - Google Patents

Digital raster display system

Info

Publication number
GB1503362A
GB1503362A GB2048575A GB2048575A GB1503362A GB 1503362 A GB1503362 A GB 1503362A GB 2048575 A GB2048575 A GB 2048575A GB 2048575 A GB2048575 A GB 2048575A GB 1503362 A GB1503362 A GB 1503362A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
display
raster
data
line
area
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
GB2048575A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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
    • G09G5/02Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/14Digital output to display device; Cooperation and interconnection of the display device with other functional units
    • G06F3/153Digital output to display device; Cooperation and interconnection of the display device with other functional units using cathode-ray tubes
    • 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
    • G09G5/42Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the display of patterns using a display memory without fixed position correspondence between the display memory contents and the display position on the screen

Abstract

1503362 Cathode-ray tube displays INTERNATIONAL BUSINESS MACHINES CORP 15 May 1975 [11 June 1974] 20485/75 Heading H4T The invention is directed to a computer driven digital television type (i.e. raster scanned) display system and is particularly concerned with providing a system which allows selective modification of data and the erasing of data without erasing overlaying material, e.g. data common to intersecting vectors, whilst reducing the storage requirements which such manner of operation requires in prior art systems. This is brought about by employing a technique described as 'on-the-fly' or 'implicit refresh' in which all displayable data retains its identity in computer coded form up to the final stages of video signal generation. As described, a refresh buffer 28 (Fig. 1) is loaded (e.g. from a computer) with lists of coded data each list representing displayed elements having an endpoint on the same raster line the raster lines being different for each list and the lists being transferred in operation to an intermediate buffer store 38 from which they are transferred, in synchronism with the display of raster lines, to a symbol generator 40 and a vector generator 42. The latter then operate to generate from each list the sequence of binary digits (video ON-OFF signals) appropriate to the raster line represented by the list and returns to the intermediate store 38 only that coded data which relates to display elements which extend to the next raster line to that represented by the list. The intermediate buffer 38 is organized into a pre-load area and an active area with a total capacity of 256 32-bit words data words being transferred from buffer 28 to buffer 38 as room becomes available in the pre-load area and from the latter area to the active area as required for display. All vector and symbol video data are assembled in "one line" of a partial raster assembly store (PRAS) 44, which has a capacity of "two lines", during the line time preceding it display and then read out at video rate whilst the next line is being assembled. The read out video is then mixed with synch and timing signals in output driver 46 and supplied to the display tube. Three PRAS's 44, one for each primary colour of a colour display tube may be driven by the generators 40, 42. The invention is described in the context of its use in a system in which each of a plurality of colour display consoles may interact with a "host" computer via a trackball (for cursor control), function keyboard, alphanumeric keyboard and a light pen.
GB2048575A 1974-06-11 1975-05-15 Digital raster display system Expired GB1503362A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US47881674 true 1974-06-11 1974-06-11

Publications (1)

Publication Number Publication Date
GB1503362A true true GB1503362A (en) 1978-03-08

Family

ID=23901471

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2048575A Expired GB1503362A (en) 1974-06-11 1975-05-15 Digital raster display system

Country Status (5)

Country Link
JP (1) JPS5845714B2 (en)
CA (1) CA1053817A (en)
DE (1) DE2525509C2 (en)
FR (1) FR2274974B1 (en)
GB (1) GB1503362A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4451825A (en) * 1979-09-27 1984-05-29 International Business Machine Corporation Digital data display system
EP0955625A1 (en) * 1997-01-23 1999-11-10 Sharp Kabushiki Kaisha Programmable display device
FR2868865A1 (en) * 2004-04-08 2005-10-14 Philippe Hauttecoeur Method and volatile construction system of an image displayed on a display system from a plurality of objects

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60191293A (en) * 1984-03-12 1985-09-28 Daikin Ind Ltd Fast linear interpolation circuit for crt display unit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA830119A (en) * 1963-10-16 1969-12-16 A. Cole Donald Digital storage and generation of video signals
DE1574723A1 (en) * 1968-01-16 1970-07-16 Siemens Ag Method and arrangement for displaying composed of straight lines on the screen of a cathode ray tube mark
US3555523A (en) * 1969-03-28 1971-01-12 Ultrasonic Systems Corp Information storage and display system
US3675232A (en) * 1969-05-21 1972-07-04 Gen Electric Video generator for data display
CA925589A (en) * 1970-02-16 1973-05-01 Tokonami Masao Method for displaying character and/or limited graph

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4451825A (en) * 1979-09-27 1984-05-29 International Business Machine Corporation Digital data display system
EP0955625A1 (en) * 1997-01-23 1999-11-10 Sharp Kabushiki Kaisha Programmable display device
EP0955625A4 (en) * 1997-01-23 2002-07-24 Sharp Kk Programmable display device
US7256789B1 (en) 1997-01-23 2007-08-14 Sharp Kabushiki Kaisha Programmable display device
FR2868865A1 (en) * 2004-04-08 2005-10-14 Philippe Hauttecoeur Method and volatile construction system of an image displayed on a display system from a plurality of objects
WO2005104086A1 (en) * 2004-04-08 2005-11-03 Philippe Hauttecoeur Method and system for volatilely building an image displaceable of a display system from a plurality of objects

Also Published As

Publication number Publication date Type
CA1053817A1 (en) grant
JPS513536A (en) 1976-01-13 application
FR2274974B1 (en) 1977-07-08 grant
DE2525509A1 (en) 1976-01-02 application
JPS5845714B2 (en) 1983-10-12 grant
CA1053817A (en) 1979-05-01 grant
DE2525509C2 (en) 1985-01-17 grant
FR2274974A1 (en) 1976-01-09 application
JP1213346C (en) grant

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee