GB1324853A - Electro-luminescent display system - Google Patents

Electro-luminescent display system

Info

Publication number
GB1324853A
GB1324853A GB3747770A GB1324853DA GB1324853A GB 1324853 A GB1324853 A GB 1324853A GB 3747770 A GB3747770 A GB 3747770A GB 1324853D A GB1324853D A GB 1324853DA GB 1324853 A GB1324853 A GB 1324853A
Authority
GB
United Kingdom
Prior art keywords
pulse generator
display device
mark
switch
space ratio
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
GB3747770A
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.)
Ford Motor Co Ltd
Ford Motor Co
Original Assignee
Ford Motor Co Ltd
Ford Motor Co
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 Ford Motor Co Ltd, Ford Motor Co filed Critical Ford Motor Co Ltd
Publication of GB1324853A publication Critical patent/GB1324853A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B44/00—Circuit arrangements for operating electroluminescent light sources
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

1324853 Matrix displays FORD MOTOR CO Ltd 4 Aug 1970 37477/70 Heading G5C [Also in Divisions C4 and H2] A display system which may be used as warning lights or for instrument illumination in motor vehicles comprises an electronic switch 12 operable to connect a D.C. electroluminescent display device 10 to a substantially constant voltage D.C. power source 11, a pulse generator 13 turning the switch on periodically at a frequency sufficiently high to substantially avoid flicker in the display device, the mark/space ratio of the pulse generator being variable to change the display brightness. The mark/space ratio of the pulse generator is continuously variable from a maximum brightness condition in which a continuous signal is supplied to turn the transistor switch on, to a minimum brightness condition in which each pulse occupies only a small part of each cycle. The display device 10 may include a number of such EL elements and switching means for selectively connecting different elements to a power input of the device so that information can be displayed.
GB3747770A 1970-08-04 1970-08-04 Electro-luminescent display system Expired GB1324853A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3747770 1970-08-04

Publications (1)

Publication Number Publication Date
GB1324853A true GB1324853A (en) 1973-07-25

Family

ID=10396773

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3747770A Expired GB1324853A (en) 1970-08-04 1970-08-04 Electro-luminescent display system

Country Status (1)

Country Link
GB (1) GB1324853A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466046A1 (en) * 1979-09-25 1981-03-27 Nissan Motor BRIGHTNESS CONTROL DEVICE FOR LIGHT DISPLAY INDICATION OF ELECTRONIC MEASURING APPARATUS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466046A1 (en) * 1979-09-25 1981-03-27 Nissan Motor BRIGHTNESS CONTROL DEVICE FOR LIGHT DISPLAY INDICATION OF ELECTRONIC MEASURING APPARATUS

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee