Patents Examined by D. C. Peter Chu
  • Apparatus for producing a video signal in synchronism with an external synchronizing signal
    Patent number: 5929923
    Abstract: An encoder generating an analogue color signal is configured by a digital circuit. An external frame signal supplied from an external apparatus is counted by a clock pulse signal generated by a crystal oscillator, and a synchronizing signal to be added to the luminance signal is produced on the basis of a counted results, and all horizontal synchronizing periods of digital active lines are made identical, and in vertical blanking period, a predetermined horizontal synchronizing period is made variable.
    Type: Grant
    Filed: October 29, 1996
    Date of Patent: July 27, 1999
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Eiji Yamauchi, Kiyokazu Hashimoto, Tomoo Nakagawa