GB1478668A - Device supplying impulses to elements of the elctroluminescent display of a time piece - Google Patents

Device supplying impulses to elements of the elctroluminescent display of a time piece

Info

Publication number
GB1478668A
GB1478668A GB34227/74A GB3422774A GB1478668A GB 1478668 A GB1478668 A GB 1478668A GB 34227/74 A GB34227/74 A GB 34227/74A GB 3422774 A GB3422774 A GB 3422774A GB 1478668 A GB1478668 A GB 1478668A
Authority
GB
United Kingdom
Prior art keywords
capacitor
transistors
current
display
pulse
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
GB34227/74A
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.)
Ebauches SA
Original Assignee
Ebauches SA
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 Ebauches SA filed Critical Ebauches SA
Publication of GB1478668A publication Critical patent/GB1478668A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/08—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques
    • G04G9/10—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques by controlling light sources, e.g. electroluminescent diodes
    • G04G9/102—Visual time or date indication means by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques by controlling light sources, e.g. electroluminescent diodes using multiplexing techniques
    • 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
    • G09G3/12—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 electroluminescent elements
    • G09G3/14—Semiconductor devices, e.g. diodes

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Electric Clocks (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of El Displays (AREA)
  • Led Devices (AREA)
  • Power Conversion In General (AREA)

Abstract

1478668 Electronic timepieces EBAUCHES SA 23 Aug 1974 [23 Aug 1973] 34227/74 Heading G3T [Also in Division G5] Pulses are applied to e.1. display elements of a timepiece by discharging a capacitor through the element. A L.E.D. 5 is energized by current from capacitors 1, 2 alternately discharging via transistors 3, 4 driven by squarewave pulse trains A, B, 180 degrees out of phase. In another embodiment the display comprises two figure of eight arrays of L.E.D.s a-g, p. Anodes of corresponding L.E.Ds are connected and supplied with current by capacitors 1, 2 via control transistors 21, 28. Cathodes of each array are inter-connected and controlled by transistors 29, 30 which are operated sequentially. Pulses are applied sequentially to transistors 21, 28 except when an L.E.D. is not to be energized. Thus a pulse from capacitor 1 is applied to L.E.D. <SP>a</SP>F, then a pulse from capacitor 2 is applied to L.E.D. bF et seq. Current is supplied to each capacitor via two transistor pairs 8, 9, 12, 13; 10, 11, 14, 15 and a resistor network which includes a photoresistor to increase current in high ambient light conditions.
GB34227/74A 1973-08-23 1974-08-23 Device supplying impulses to elements of the elctroluminescent display of a time piece Expired GB1478668A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1212073A CH578759B5 (en) 1973-08-23 1973-08-23

Publications (1)

Publication Number Publication Date
GB1478668A true GB1478668A (en) 1977-07-06

Family

ID=4380049

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34227/74A Expired GB1478668A (en) 1973-08-23 1974-08-23 Device supplying impulses to elements of the elctroluminescent display of a time piece

Country Status (5)

Country Link
JP (1) JPS5051683A (en)
CH (2) CH578759B5 (en)
DE (2) DE2437839A1 (en)
FR (1) FR2257937B1 (en)
GB (1) GB1478668A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8378541B2 (en) 2008-07-21 2013-02-19 Siemens Aktiengesellschaft Magnetic radial bearing and magnetic bearing system having a three-phase controller
US10785841B2 (en) 2016-09-01 2020-09-22 Osram Oled Gmbh Driver circuit for light-emitting component

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534351A (en) * 1967-04-07 1970-10-13 Gen Electric Light coupled battery powered remote control apparatus
DE2004076A1 (en) * 1970-01-30 1971-08-05 Kieninger & Obergfell Electronic clock with low power requirements
FR2105003B3 (en) * 1970-09-15 1973-06-08 Lip Horlogerie
DE2119707A1 (en) * 1971-04-22 1972-11-02 Gebr. Junghans Gmbh, 7230 Schramberg Circuit arrangement for driving battery-powered clocks of high accuracy
JPS4823113U (en) * 1971-07-23 1973-03-16
DE2148750A1 (en) * 1971-09-30 1973-05-17 Grabe Bernt Von ELECTRONIC WRISTWATCH
DE2263671A1 (en) * 1972-12-27 1974-07-04 Siemens Ag CIRCUIT ARRANGEMENT OF LIGHT Emitting Semiconductor Elements
US3784844A (en) * 1972-12-27 1974-01-08 Rca Corp Constant current circuit
DE2304506B2 (en) * 1973-01-31 1977-05-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt CIRCUIT FOR OPERATING A LUMINESCENT SEMICONDUCTOR COMPONENT

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8378541B2 (en) 2008-07-21 2013-02-19 Siemens Aktiengesellschaft Magnetic radial bearing and magnetic bearing system having a three-phase controller
US10785841B2 (en) 2016-09-01 2020-09-22 Osram Oled Gmbh Driver circuit for light-emitting component

Also Published As

Publication number Publication date
DE2440581C3 (en) 1981-07-09
DE2440581A1 (en) 1975-05-28
DE2437839A1 (en) 1975-03-27
CH578759B5 (en) 1976-08-13
FR2257937A1 (en) 1975-08-08
FR2257937B1 (en) 1981-08-21
DE2440581B2 (en) 1976-12-16
JPS5051683A (en) 1975-05-08
CH1212073A4 (en) 1976-03-15

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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