Sony Corporation

Casio Computer Co., Ltd.

Citec Corporation

Kabushiki Kaisha Toshiba

Takashi Kokubo

Noriyuki Hirayama

Minoru Okuda

Toshihiro Yoshida

Hideo Hamanaka

Kiyoshi Numata

Yoshiaki Takano

Takatoshi Haraguchi

Kazuo Morioka

Youichi Imazeki

Hideharu Murayama

A projection device comprises a light source, a color wheel which is inserted into an optical path of the light source and in which a plurality of color segments are formed along a peripheral direction of the color wheel. The color segments are configured to transmit a plurality of wavelength band components in the white light in a time division manner during a rotation of the color wheel. A light source driving unit alternating-current discharges the light source at a period shorter than a rotation period of the color wheel while reverses a polarity at a timing to switch the segment of the color wheel inserted into the optical path.

Projection device and projection method

A multitrack recording apparatus includes a multi-channel recorder for recording musical timing data on a recording medium, a modulator for variably setting a recording cycle of the musical timing data, and a keyboard for designating a desired search position of the recording medium according to the musical timing data. The apparatus also includes a reproduction head for reproducing the musical timing data from the recording medium, a controller for calculating the driving position of the recording medium on the basis of the reproduced musical timing data and for controlling the driving of the recording medium to stop the recording medium at the designated search position, and a dispaly unit for displaying musical data on the basis of the reproduced musical timing data.

Multitrack recording apparatus which stops the recording medium on the

Automatic viewing screen

A color video projector as disclosed which includes a cabinet having a depressed top deck, and a mirror carrying L-shape mounting board pivotally carried by a pair of slidably movable arms, guide grooves on the side edges of said top deck and guide pins protruding from the mounting board ride in the guide grooves during withdrawal of the mounting board. The board can only be rocked to its upright position when the arms are fully extended and can only be rocked back to its original position when the arms are fully extended and from which position the mounting board can be pushed back into the cabinet with the mirror above the top deck.

Video projector and mounting structure

Growing community of inventors

Tokyo, Japan

Takashi Kokubo