Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-12-08
1984-01-24
Murray, Richard
Facsimile and static presentation processing
Facsimile
Recording apparatus
358241, 340784, H04N 574
Patent
active
044279973
ABSTRACT:
The invention relates to planar display screens and more particularly to smectic liquid crystal screens.
One of the problems of high definition display screens (approximately 100 to 1000 lines and columns) is caused by the devices for controlling the heating current on the lines. The complexity of the installation and costs limit the increase in the definition. The invention arranges the N lines of a screen into .sqroot.N groups of lines supplied at each of their ends by .sqroot.N control devices functioning sequentially, i.e. 2.sqroot.N devices in all. Moreover, each line has a diode placed between the heating resistor and the common point of the circuit.
Application to the display of images transmitted in the form of a video signal for television and display peripheral equipment in teletransmission.
REFERENCES:
IBM Technical Bulletin, "Liquid Crystal Display System" vol. 16, No. 4, Sep. 1973.
Hareng Michel
Hehlen Robert
Le Berre Serge
Leclerc Pierre
Marcenac Philippe
"Thomson-CSF"
Murray Richard
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