The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 24, 1984
Filed:
Dec. 08, 1981
Michel Hareng, Paris, FR;
Robert Hehlen, Paris, FR;
Serge Le Berre, Paris, FR;
Pierre Leclerc, Paris, FR;
Philippe Marcenac, Paris, FR;
Jean-Noel Perbet, Paris, FR;
Thomson-CSF, Paris, FR;
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.