Hitachi, Ltd.

Yoshisada Taniguchi

Keizo Shimizu

Toshio Fujimura

Hayashi Nagami

Masanori Oguino

Shinpei Otsu

Toshihiko Tsuji

Shimpei Otsu

A video disc player having an operational state for holding the disc without rotation when the disc has been inserted into or has been prepared for withdrawal from the player as well as a reproduction state for picking up the signal recorded on the disc when the disc is on the rotating turntable, in which the time of the holding state of the disc is measured and when the holding state of the disc exceeds a predetermined time, the disc is set on the turntable and the turntable continuously rotates until another state instruction is generated, thereby suppressing deformation of the disc.

Record disc reproducing apparatus

An apparatus for reproducing information from a record disc having a poor heat-resistant capability, in which a turntable for carrying the record disc is caused to rotate by a motor coupled thereto while the apparatus is made ready for a reproducing operation except when the record disc is being moved for loading and unloading of the turntable.

Apparatus for reproducing information from a record disc

Red, blue and green color difference signals are supplied to the bases of first, second and third transistors amplifying the tri-color signals of red, blue and green, and a luminance signal is introduced to the emitter of each transistor through a parallel circuit of two resistors. One of the resistors in each parallel circuit is connected through a switch. The switches are associatively operated so that the on-off operation of the switch connected to the emitter of the first transistor is opposite to that of the switches connected to the emitters of the second and the third transistor. By operating the switches, the amplification degree of the first transistor is increased and simultaneously the amplification degrees of the second and third transistors are decreased, and therefore an image with red emphasized can be obtained with no change in luminance.

Color tone control device in color television receiver

Growing community of inventors

Fujisawa, Japan

Yoshisada Taniguchi