Patents Assigned to Casio Electronics Mfg. Co. Ltd.
  • Patent number: 4614954
    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.
    Type: Grant
    Filed: September 12, 1984
    Date of Patent: September 30, 1986
    Assignees: Casio Computer Co., Ltd., Casio Electronics Mfg. Co. Ltd.
    Inventors: Morio Ohta, Shizuo Tsuchiya, Yoshito Nakano, Masaru Aikawa, Seiji Asaumi