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:
Sep. 30, 1986
Filed:
Sep. 12, 1984
Morio Ohta, Musashimurayamashi, JP;
Shizuo Tsuchiya, Musashimurayamashi, JP;
Yoshito Nakano, Musashimurayamashi, JP;
Masaru Aikawa, Musashimurayamashi, JP;
Seiji Asaumi, Musashimurayamashi, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Casio Electronics Mfg. Co. Ltd., Tokyo, JP;
Abstract
In a recording apparatus of this invention, liquid crystal light shutter operates by using the double frequency drive. The double frequency drive employs a higher frequency f.sub.H and lower frequency f.sub.L. The dielectric anisotropy becomes positive in the case of the lower frequency f.sub.L than crossover frequency f.sub.C and becomes negative in the case of the higher frequency f.sub.H than the frequency f.sub.C of liquid crystal material. The driver circuit of liquid crystal light shutter includes a delay circuit (146). Both a recording data delayed through the delay circuit (146) and a recording data formed without going through the delayed circuit (146) are produced in an LSI, to be supplied to write selecting electrodes and signal electrodes of the liquid crystal light shutter, thereby driving the liquid crystal light shutter in a time sharing manner.