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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.:

US 4447812 B1

PDFFull Text
Date of Patent:
May. 08, 1984

Filed:

Jun. 03, 1982

Liquid crystal matrix display device

Applicant:
Inventors:

Mitsuo Soneda, Zama, JP;

Takaji Ohtsu, Hatano, JP;

Assignee:

Sony Corporation, Tokyo, JP;

Attorneys:

Eslinger; Lewis H.

Sinderbrand; Alvin

Primary Examiner:

Gerald L Brigance

Int. Cl.
CPC ...
G09G / ;
U.S. Cl.
CPC ...
340784 ; 340802 ; 340718 ; 358241 ;
Abstract

A liquid crystal matrix display device has a plurality of display elements arranged in an X-Y matrix pattern. Vertical transmitting lines are connected to all of the display elements of each column, and horizontal transmitting lines are connected to each of the display elements of each row. Each of the vertical lines is connected through an input switching element to an input circuit to receive a video input signal and a horizontal pulse generator provides sequential pulse signals to control terminals of the input switching elements. In order to improve the resolution without sacrifice of contrast, the vertical transmitting lines are arranged into groups of a predetermined number of such lines, and the input switching elements associated with the lines of each such group have their control electrodes coupled together to a respective output of the horizontal scanning pulse generator. The input circuit includes time-demultiplexing circuitry, for example, formed of sample/hold circuits, to present respective sampled versions of the input signal, staggered with respect to one another, to input electrodes of respective ones of the input switching devices of each of the groups.

Find Patent Forward Citations

Soneda, Mitsuo. (1984). Liquid crystal matrix display device (U.S. Patent No. 4447812). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4447812

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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