Citizen Watch Company, Ltd.

Hirohiko Yoshida

Fumio Nakajima

Minoru Natori

A display device includes a spectroscopic unit for making a corresponding spectral diffraction in accordance with wavelengths of light and an image display unit including a light valve which has a plurality of picture elements. The light valve receives the light-subjected to assortment by color with the spectroscopic unit and controls the light quantity of outgoing light, respectively, thereby passing any light of the three primary colors.

Multicolor picture display device

A piezo-electric oscillator composed of a quartz crystal, an inverting amplifier connected across the quartz crystal, an output capacitor connected to an output side of the quartz crystal, and a plurality of input capacitors. The input capacitors are selectively coupled to the input side of the quartz crystal by means of an electronic switching means by which an output frequency of the quartz crystal is adjusted to a prescribed value.

Growing community of inventors

Hoya, Japan

Hirohiko Yoshida