GB1296551A - - Google Patents

Info

Publication number
GB1296551A
GB1296551A GB1296551DA GB1296551A GB 1296551 A GB1296551 A GB 1296551A GB 1296551D A GB1296551D A GB 1296551DA GB 1296551 A GB1296551 A GB 1296551A
Authority
GB
United Kingdom
Prior art keywords
line
bright
display
producing
straight
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
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 filed Critical
Publication of GB1296551A publication Critical patent/GB1296551A/en
Expired legal-status Critical Current

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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

Landscapes

  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Television Scanning (AREA)

Abstract

1296551 Cathode-ray tube display ELLIOTT BROS (LONDON) Ltd 13 May 1970 [14 May 1969 24 Dec 1969] 24653/69 and 62816/69 Heading H4T A CRT display system includes means for drawing lines (which may be straight or curved) by bright-up during a raster-type scan, comprising two waveform generators producing recurrent signal waveforms, one at line and one at frame frequency, and a comparator receiving the signals and producing a bright-up signal at equality. If the line and frame waveforms are linear the display will be a straight line, and if the line waveform is made parabolic the display will be elliptical. Suitable waveform generators including integrators and summing circuits are described and illustrated schematically. Specification 1,296,552, the claims of which relate to the form and duration of the bright-up pulses, is referred to.
GB1296551D 1969-05-14 1969-05-14 Expired GB1296551A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2465369 1969-05-14

Publications (1)

Publication Number Publication Date
GB1296551A true GB1296551A (en) 1972-11-15

Family

ID=10215123

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1296551D Expired GB1296551A (en) 1969-05-14 1969-05-14

Country Status (1)

Country Link
GB (1) GB1296551A (en)

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Legal Events

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