Patents by Inventor Tetsuya Sekido

Tetsuya Sekido has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Temperature compensation circuit in a pickup tube device
    Patent number: 4494145
    Abstract: A temperature compensation circuit in a pickup tube device comprising a pickup tube, a bias lighting device provided at the front surface of the pickup tube for irradiating a bias light, a circuit for generating a shading compensation signal, and a circuit for supplying a black gate pulse, comprises a temperature compensation signal generating circuit for generating a temperature compensation signal for cancelling variation in a signal current component from the pickup tube due to variation in the bias light obtained from the bias lighting device which is in accordance with temperature variation, a compensation signal obtaining circuit for obtaining a compensation signal by multiplexing the temperature compensation signal generated by the temperature compensation signal generating circuit with the shading compensation signal, and a mixing circuit for mixing the multiplexed compensation signal, the output signal of the pickup tube, and the black gate pulse.
    Type: Grant
    Filed: September 10, 1982
    Date of Patent: January 15, 1985
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Seigo Kokufukata, Tetsuya Sekido