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 5877733 B1

Date of Patent:

Mar. 02, 1999

Filed:

Aug. 16, 1996

Liquid crystal display device and radio reception apparatus provided

Applicant:

Inventors:

Shigeru Uchida, Higashihiroshima, JP;

Terufumi Hino, Higashihiroshima, JP;

Assignee:

Sharp Kabushiki Kaisha, Osaka, JP;

Attorney:

Primary Examiner:

Steven J Saras

Assistant Examiner:

David L Lewis

Int. Cl.

CPC ...

G09G / ; G09G / ; G09G / ; H04B / ;

U.S. Cl.

CPC ...

345 52 ; 345-4 ; 345 33 ; 345 50 ; 345 51 ; 4551582 ; 4551584 ; 4551585 ;

Abstract

The invention is directed to simultaneously implement display by using the first and second liquid crystal display sections. While a voltage (1/2 V.sub.L) which is a half of a drive voltage V.sub.L supplied from the second drive power supply by the second liquid crystal driver is taken as a virtual ground, a voltage (1/4 V.sub.L) resulting from positively and negatively dividing by 4 the drive voltage V.sub.L is applied to each of electrodes of the second liquid crystal display section defined in the liquid crystal display panel. In a selected waveform, by applying a voltage which exceeds the saturation voltage of liquid crystals, to selected portions of the waveform, the liquid crystals are turned on. In a non-selected waveform, such a voltage is not applied. In the second liquid crystal display section, direct current component of the waveform of a signal supplied by the second liquid crystal driver is cut off by the direct current cutoff circuit. A bias voltage (1/2 V.sub.H) generated by the bias circuit is added to an output with the direct current component cut off. The resulting signal is applied to each of electrodes of the second liquid crystal display section.

Find Patent Forward Citations

Uchida, Shigeru. (1999). Liquid crystal display device and radio reception apparatus provided (U.S. Patent No. 5877733). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5877733

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