Seiko Epson Corporation

Hiroshi Shingu

Takashi Takeda

Kenichi Okuhara

Hidenori Makiba

Takashi Miyazaki

Kiminori Kanamori

To provide a laser light source unit, a display device, a scanning display device and a projector, in each of which, when a laser is taken out of the chassis or the like, a laser thereof is assuredly rendered incapable of emitting. The laser light source unit includes a laser light source portionhaving a light oscillation portionemitting light, a fixing member that fixes the laser light source portion, an interrupting means that, simultaneously with a movement of removing the laser light source portionoff the fixing member, interrupts a current path for supplying a current to the light oscillation portionin the laser light source portion.

Laser light source device, display device, scanning type display device, and projector

This invention relates to a two-layer display type of electronic equipment having a liquid crystal panel (,) and a background display portion (,) on a rear surface side thereof. The liquid crystal panel (,) has a main liquid crystal panel unit (,) formed by inserting a liquid crystal layer (,) between a first substrate (,) and a second substrate (,). The liquid crystal layer (,) is set to either a light-transmitting state or a light-scattering state by an electrical field that is applied to the liquid crystal. This liquid crystal panel (,) has a transparent layer (,) on the rear surface of the second substrate (,). If the refractive index of this transparent layer (,) is n,, the refractive index of the second substrate (,) in contact with the front side of this transparent layer is n,, and the refractive index of the air layer in contact with the rear side of the transparent layer (,) is n,, the following relationship is established: n,<n,<n,.

Two-layer liquid crystal panel having a polymer liquid crystal layer and equipment using the same

A liquid crystal composition for use in negative display, transmission-type, liquid crystal display elements, said composition comprising a nematic liquid crystal having positive dielectric anisotropy and a positive dichroic dye. Liquid crystal display devices comprising liquid crystal display cells including nematic liquid crystals having positive dielectric anisotropy and positive dichroic dyes are disclosed.

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Azumino, Japan

Hiroshi Shingu