Sony Corporation

Hisao Kitai

Mikiya Kobayashi

Tetsuro Ochi

A liquid crystal projector has a pre-sheet polarizer and an incoming light side sheet polarizer on the incoming light side of a liquid crystal panel. Two sheet polarizers superimposed to each other are stuck on the outgoing light side face of the liquid crystal panel. The degree of polarization of the pre-sheet polarizer is smaller than that of the incoming light side sheet polarizer, so that both the sheet polarizers suitably share the quantity of absorbed light. Similarly, the degree of polarization of the incoming light side one of the sheet polarizers stuck on the outgoing light side face of the liquid crystal panel is smaller than that of the other one, so that both the sheet polarizers suitably share the quantity of absorbed light. With this configuration, the durability of the sheet polarizer is improved and the light output is increased.

Projection LCD having a sheet polarizer with protective layers on both

A liquid crystal display device and a liquid crystal projector using the same are provided for suppressing reduction in liquid crystal properties due to heat and light by precisely shielding light in regions other than a region irradiated with light corresponding to effective pixels. Light-shielding substrates are each brought to absolute contact with a back of a drive substrate and a front of an opposed substrate, respectively. One of the light-shielding substrates is provided with a frame-shaped light-shielding film formed in a region on a surface of a transparent substrate opposed to a non-irradiated region in the drive substrate. Similarly, the other of the light-shielding substrates is provided with a frame-shaped light-shielding film formed in a region on a surface of a transparent substrate opposed to a non-irradiated region in the opposed substrate. The light-shielding films each have an excellent light-shielding property with optical density of 3.0 or above, for example. The light-shielding films are thinly formed in order to suppress stress strain, that is, warpage of glass, due to an adhesive for bonding the light-shielding films to the drive substrate and the opposed substrate, respectively. The light-shielding films are made of a conductive film such as aluminum (Al) and grounded. As a result, the light-shielding films have a function of electrically shielding the liquid crystal display device besides the light-shielding function.

Liquid crystal display device and liquid crystal projector using same

A liquid crystal panel unit and a liquid crystal projector incorporating the liquid crystal panel unit. The panel includes a metallic sealed container with a light-transmissive window, a liquid crystal panel accommodated in the sealed container so as to allow light being transmitted to leave the light-transmissive window, and a fan accommodated in the sealed container so as to be spaced from the liquid crystal panel. The liquid crystal panel unit can reliably cool the liquid crystal panel, without any deterioration in the image quality due to dust. A liquid crystal projector using the liquid crystal panel unit is also provided.

Growing community of inventors

Kanagawa, Japan

Hisao Kitai