Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Makoto Hoshino

Takehiro Okada

Masanari Hashimukai

Shozo Aono

Shoji Kawahara

Naoto Saruwatari

Koji Yoshioka

Hiroshi Sekido

Takanobu Taniyama

Masanori Gotou

A lamp unitincludes a lamp, a lamp holderfor holding the lamp, a handle sectionused when removing the lamp unitfrom a projector, and a support sectionfor supporting the lamp unitfrom below. The support sectionincludes a front side support sectionfor supporting the lamp unitat a front side of the lamp unit, and a back side support sectionthat is disposed behind the lampand is for supporting the lamp unitat a tip thereof located outside an outer circumference of the lampwhen the lamp unitis viewed from front.

Lamp unit

With a trend toward a higher intensity projection type liquid crystal display device to further increase brightness of a projection screen, rated input power of a light source lamp increases, which makes essential a fan apparatus for cooling the light source lamp, etc. Such a fan apparatus would require a light-shielding member which causes the number of parts to increase. The present invention provides a fan apparatus provided with a rotor section that can be rotated/driven around a predetermined rotation axis and a propeller section including propeller blades and attached to the rotor section arranged in such a way as to substantially shield light parallel to the rotation axis.

Fan apparatus, method of manufacturing fan apparatus, projection type display device and electronic device

In a liquid crystal projection apparatus having a plurality of lamps, and a plurality of cooling means for cooling the plurality of lamps individually, the lamp includes the following: a cup-shaped reflecting mirror,having an air discharge hole,A, an insulator,having an air suction hole,A, a front glass,a light emitting tube,and air passages (a) to (c) in the lamp for cooling the light emitting tube. The cooling means,sucks in hot air from the lamp, and exhausts the hot air toward the louver of the case. Thus, the lamps and the liquid crystal projection apparatus are cooled effectively.

Liquid crystal projection apparatus and lamp

A front liquid crystal display projector includes a housing having an exhaust port and a projection opening, an optical block, installed in the housing, having a light source, a reflection mirror, a light separator, an image display unit using liquid crystal, an image combining unit, a projection lens, and an exhaust fan installed between the light source and the exhaust port. The reflection mirror changes the direction of the light from the light source, and the projection lens and the light source are disposed parallel to each other. The exhaust port and the projection opening are provided at a first side of the housing. An image formed by the optical block is projected from the first side and from the projection opening, and air in the housing is discharged from the exhaust port and also from the first side. In addition, the exhaust port prevents stray light from the light source, which exits the exhaust port, from overlapping the image projected from the projection opening.

Front liquid crystal display projector

A nut 13 is provided on a holding board 9 of a barrel 8 housing a projection lens. At both sides of a holding base 11 are supporting plates 12 having a stepping shape for presenting a sliding gap, and the holding board 9 is inserted in the sliding gap. At an upper corner of the holding base 11 is a pivot pedestal 14, and a shift rod 15 is attached revolvable to the pivot pedestal 14, the shift rod 15 having a screw portion 16 that engage with the nut 13. The projection lens moves up and down driven via nut 13 by revolution of the shift rod 15, for the height adjustment of projection lens.

LCD video projector

A liquid crystal display projector comprising a light source, a group of mirrors, liquid crystal display devices, a projection lens, a main body containing the light source, group of mirrors, liquid crystal display devices and projection lens, and a mechanism whereby the projection lens is allowed to retract into and protrude from the main body. The projection lens comprises an outer cylinder having a ring-like shape; a drive motor with a gear; a ring-like intermediate cylinder with a first cam groove, second cam groove and gearwork provided on the exterior thereof with the gearwork meshing with the gear of the drive motor and is installed on the inner side of the outer cylinder so as to be made movable by sliding; a first inner cylinder having a first axis to fit in the first cam groove and fits with the inner surface of the intermediate cylinder in the front portion thereof so as to be movable by sliding according to the movement of the first axis caused by the rotation of the first cam groove; a second inner cylinder having a second axis to fit in the second cam groove and fits toward the back of the inner surface of the intermediate cylinder so as to be movable by sliding according to the movement of the second axis caused by the rotation of the second cam groove; and a plurality of lenses installed in the cylinders at specified positions. The projection lens operates such that driving of the drive motor causes the intermediate cylinder to rotate and the rotation of the intermediate cylinder allows the projection lens to zoom by extending and retracting the first inner cylinder.

Growing community of inventors

Osaka, Japan

Makoto Hoshino