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. 16, 1990
Filed:
Jun. 21, 1988
Morio Ohta, Tokyo, JP;
Hideaki Inoue, Tokyo, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Casio Electronics Manufac. Co. Ltd., Tokyo, JP;
Abstract
An arrangement of the liquid crystal light shutter wherein its liquid crystal matter is two-frequency-driven by signals (or waveforms) in which frequencies (f.sub.H and f.sub.L) higher and lower than a frequency (f.sub.C), which inverts the dielectric aniostropy of the liquid crystal matter, is contained. The liquid crystal matter of this liquid crystal light shutter includes a dichroic dye, and serves to pass or absorb the light entering into the liquid crystal light shutter. This causes the liquid crystal light shutter to be opened or closed, and the liquid crystal light shutter is provided with a polarizing plate for polarizing the light passing through, or entering into this liquid crystal light shutter. The present invention relates to a second polarizing plate employed by the liquid crystal light shutter, for polarizing the light exiting the shutter.