Mitsubishi Denki Kabushiki Kaisha

Akira Sano

Toyoshi Makino

Masanori Kojima

Masafumi Kodama

The present invention provides a movable magnetic head unit including a signal transmission element. The transmission element transmits by wireless, i.e., through noncontact transmission, a control signal for driving an electromechanical transducing element fixed to a rotary magnetic head. Therefore, noises are prevented from appearing on a display, and stable compensation in the deviation of the magnetic head and a high reliability of the magnetic head unit can be attained.

Magnetic recording/reproducing device with wireless transmission of

The present invention provides a movable magnetic head unit including a signal transmission element. The movable magnetic head is mounted upon a rotary drum of a drum assembly which also includes a stationary drum, the rotary and stationary drums being supported by a shaft. The signal transmission element transmits a control signal wirelessly to the rotary drum to drive an electromechanical transducing element which moves the magnetic head. The signal transmission element may include rotary transformers, mounted on the rotary and stationary drums, facing each other. In a further embodiment, the signal transmission element may include an optical transmitter for optically transmitting the position control signal to an optical receiver mounted on the rotary drum. Wireless transmission of the position control signal prevents noises from appearing on a display, enables stable compensation of deviations of the magnetic head and improves reliability of the magnetic head unit.

Red, green, and blue signals are extracted from a composite video signal, compressed on the time axis, combined into a single RGB video signal, and displayed as three separate monochrome pictures on a single cathode-ray tube. Red, green, and blue light from the monochrome pictures is combined into a single color picture. If necessary, the color are optically enlarged to the correct aspect ratio.

Small, high-resolution color display apparatus

A head-carrier drum control apparatus in a magnetic recording and/or reproducing apparatus which comprises a rotatably supported head-carrier drum assembly; a drive unit accommodated in the head-carrier drum assembly including a coil, disposed in a magnetic circuit, and at least one positionable magnetic transducing head cooperable with the coil to be displaced in a direction generally widthwise of a length of magnetic tape. The apparatus further includes a contact feeler through which a control current is supplied to the drive unit; an electrode held in contact with the contact feeler and connected electrically with the coil; and a drive circuit for controlling the position of the transducer head so as to cause a trace of movement of the transducing head depicted during information reproduction to properly follow a track recorded by a magnetic transducing head on the length of magnetic tape during information recording.

Growing community of inventors

Nagaokakyo, Japan

Akira Sano