Sanyo Electric Co., Ltd.

Norio Nakagawa

Toshihiro Saruwatari

Atsushi Kubo

Katsumi Tanaka

A liquid crystal projector device of the present invention includes an optical system for receiving light from a lamp unit. The optical system is provided with a polarization beam splitter for extracting only an S wave out of P and S waves of the light emitted from the lamp unit, and also provided with a latter stage slit plate in contact with a light incidence surface of the polarization beam splitter. The latter stage slit plate is provided with a plurality of slits for allowing light incidence on the polarization beam splitter. A former stage slit plate is arranged in a position spaced apart from the latter stage slit plate along the optical axis toward the lamp unit. The former stage slit plate is provided with a plurality of slits overlapping in the optical axis direction with the respective slits of the latter stage slit plate.

Projector device

An image display apparatus has a first exhaust fan () for mainly exhausting air from a light source unit () and discharging the air to the outside of the image display apparatus and a second exhaust fan () for mainly exhausting air from a power supply unit () and discharging the air to the outside of said image display apparatus. The inspiration face of the second exhaust fan is arranged to partly overlap the expiration face of the first exhaust fan. Accordingly, the internal temperature of the image display apparatus, and hence the temperature of the exhaust air, can be efficiently reduced, and at the same time fan noise of the fans can be reduced. As a result, uprating of power of the light source unit and downsizing of an image display apparatus can be simultaneously achieved.

Projection type image display apparatus

A projection type image display apparatus of the invention has a lamp mounting mechanism, which has an aluminum lamp holder () intervening between the lamp () and the resin lamp holder () and has a section exposed out of the resin lamp holder (). The lamp () is securely fixed in position on the aluminum lamp holder () by mounting the lamp () on the aluminum lamp holder () from above and then folding the top section () towards the top end of the lamp (). This lamp mounting mechanism can suppress the temperature of the resin lamp holder without providing a cooling fan with a large amount of power and suppress fan noise, thereby simultaneously enabling uprating of the power of the lamp and downsizing of the image display apparatus.

A liquid crystal projector device of the present invention includes a lamp unit having a lamp and a reflector, and a cooling fan for cooling the lamp unit. The reflector includes a reflecting portion having a parabolic reflecting surface, and a plurality of side walls extending from the reflecting portion to surround the lamp. A first side wall of the plurality of side walls is provided with a first air intake opening and a second air intake opening for introducing air delivered from the cooling unit toward the lamp, at both sides of a plane including a central axis of the lamp and orthogonal to the first side wall. A wind blocking wall is defined between both air intake openings. An air discharge opening is formed on a second side wall opposed to the first side wall.

A liquid crystal projector device of the present invention includes a casing having disposed therein a lamp unit, an optical system for receiving light from the lamp unit to generate image light, and a power unit. An exhaust system for cooling an inside of the casing is attached to a side surface of the casing. The exhaust system includes a first exhaust fan and a second exhaust fan, which stand along the side surface of the casing. The first exhaust fan is placed toward the lamp unit, while the second exhaust fan is placed toward the power unit. Exhaust directions of both exhaust fans intersect each other.

Projector with exhaust fans having intersecting exhaust directions

A liquid crystal projector device of the present invention includes a lamp unit, an optical system for separating light emitted from the lamp unit into light of three primary colors, and an image synthesizer for generating image light of three primary colors from the light of three primary colors, and synthesizing the generated image light of three primary colors into color image light. The image synthesizer includes three liquid crystal panels for three primary colors and three incidence polarizing plates arranged at light incidence sides of the liquid crystal panels. Each of the incidence polarizing plates includes a glass base material and a polarizing film joined to a surface thereof. The surface area ratio of the glass base material to the polarizing film is set to 178%.

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Neyagawa, Japan

Norio Nakagawa