GB1211187A - Drive circuitry for display tubes - Google Patents

Drive circuitry for display tubes

Info

Publication number
GB1211187A
GB1211187A GB20463/69A GB2046369A GB1211187A GB 1211187 A GB1211187 A GB 1211187A GB 20463/69 A GB20463/69 A GB 20463/69A GB 2046369 A GB2046369 A GB 2046369A GB 1211187 A GB1211187 A GB 1211187A
Authority
GB
United Kingdom
Prior art keywords
tube
transistor
cathode
energized
voltage
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
GB20463/69A
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.)
Sperry Corp
Original Assignee
Sperry Rand 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
Application filed by Sperry Rand Corp filed Critical Sperry Rand Corp
Publication of GB1211187A publication Critical patent/GB1211187A/en
Expired legal-status Critical Current

Links

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
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/04—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions
    • G09G3/06—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources
    • G09G3/10—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of a single character by selection from a plurality of characters, or by composing the character by combination of individual elements, e.g. segments using a combination of such display devices for composing words, rows or the like, in a frame with fixed character positions using controlled light sources using gas tubes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K21/00—Details of pulse counters or frequency dividers
    • H03K21/08—Output circuits

Abstract

1,211,187. Digital display systems. SPERRY RAND CORP. 22 April, 1969 [25 April, 1968], No. 20463/69. Heading G4H. In a numerical display multicathode tube T is energized by a constant current circuit for supplying current to the anode of the tube and means for selectively supplying power to one of the cathodes. To display a number of digits a corresponding number of tubes are provided, the anodes being repeatedly energized in turn by the decoded output of a counter applied to terminals 29. The energization of one of terminals 29 causes the corresponding transistor to conduct. Voltage is applied to the transistor from source V 5 via resistors R 5 and R 6 and the voltage across the transistor is held constant by diodes D1, D4 and D5. As each tube is selected, the appropriate cathode of the tube is selected by outputs of the memory register applied to gates A1. The output of each gate A1 is applied to the emitter of an NPN transistor Q2 the base of which is connected through resistors R3 to source V2. Each tube has an eleventh cathode for displaying the decimal point. The appropriate one is selected by a selector switch S1 energized via transistor Q3, when switch S2 is open. The cathode selector lines are connected by diodes D2 and the decimal point line is connected by diode D3 to voltage source V6.
GB20463/69A 1968-04-25 1969-04-22 Drive circuitry for display tubes Expired GB1211187A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US72419768A 1968-04-25 1968-04-25

Publications (1)

Publication Number Publication Date
GB1211187A true GB1211187A (en) 1970-11-04

Family

ID=24909441

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20463/69A Expired GB1211187A (en) 1968-04-25 1969-04-22 Drive circuitry for display tubes

Country Status (4)

Country Link
US (1) US3594758A (en)
DE (1) DE1919856B1 (en)
GB (1) GB1211187A (en)
NL (1) NL6906284A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5112234B1 (en) * 1970-10-15 1976-04-17
US3750139A (en) * 1971-07-02 1973-07-31 Scm Corp Time matrixing method of energizing selective segments of multi-cell liquid crystal displays
NL7300217A (en) * 1973-01-08 1974-07-10
US4250504A (en) * 1979-08-23 1981-02-10 General Electric Company Gas discharge display circuit
US5074802A (en) * 1989-09-12 1991-12-24 Hypertherm, Inc. Pneumatic-electric quick disconnect connector for a plasma arc torch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2664555A (en) * 1951-02-23 1953-12-29 Nat Res Dev Multielectrode gaseous-discharge tube circuits
US3213374A (en) * 1960-05-17 1965-10-19 Weltronic Co Pulse counter having plural discrete counter indication means
NL280449A (en) * 1962-07-03
FR1471504A (en) * 1965-03-15 1967-03-03 Sony Corp Display device for electronic calculators
US3395268A (en) * 1965-06-10 1968-07-30 Monsanto Co Blanking circuit for a plural cathode display tube

Also Published As

Publication number Publication date
DE1919856B1 (en) 1970-10-22
US3594758A (en) 1971-07-20
NL6906284A (en) 1969-10-28

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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