Seiko Epson Corporation

Jun Arai

Haruyoshi Yamada

Shogo Kurosawa

Motoyuki Fujimori

Masahiko Kobayashi

Akitoshi Kuroda

Shinji Haba

Kiyoshi Miyashita

Manabu Kawahara

Nobuo Watanabe

Mutsuya Furuhata

Toshio Matsumiya

Teruo Sakurai

Eijiro Fujimori

Hideyuki Kobayashi

Masayuki Suyama

Akira Tominaga

To provide an optical assembly capable of enhancing black level display while preventing deterioration of a WV film, and a projector assembled therewith, optical compensation elements are disposed before and after liquid crystal light valves, so that an unintended phase difference generated on the incident and emission sides of the liquid crystal light valves for individual colors is eliminated by adjusting the rotational positions of the optical compensation elements, thus enabling an enhancement in the contrast of a color image displayed on a transmission screen member. In case of B light including ultraviolet light in part, the optical compensation element is disposed at the subsequent stage of the liquid crystal light valve, so that as compared with when the optical compensation element is disposed at the preceding stage of the liquid crystal light valve, the optical compensation element can be reduced or prevented from deteriorating with age, thus enabling the contrast of image display to be maintained over a long period of time.

Optical assembly and projector

In order to provide a rear projector capable of facilitating position adjustment of an image displayed on a screen and optimizing dispersion of the aspect ratio of the projected image caused by tolerance of components by adjusting the position of the image, a support member () is provided with a lateral position adjuster () as a planar position adjusting mechanism attached on a support plate of an interior unit in an opposing manner, an inclination adjuster () as an inclination position adjusting mechanism vertically provided on the lateral position adjuster (), and a rotary position adjuster () as a rotary position adjusting mechanism attached to the inclination adjuster () slanted downward toward rear side.

Rear projector

A rear projector has a lower cabinet disposing an image generator and an upper cabinet for a screen body to be mounted, two woofer boxes being mounted on the front side of the lower cabinet and high-pitched sound speaker boxes being respectively mounted on the right and left lateral sides of the upper cabinet, so that, since the woofer box is disposed in the lower cabinet, vibration is not easily transferred to a screen body on the upper cabinet and a reflection mirror inside the upper cabinet, thus avoiding flicker of the image on the screen body even when great volume of sound is outputted by the woofer box.

Rear projector and producing method thereof

A panel cooling system A has a pair of Sirocco fansA,B arranged at both sides of the radial direction of a projection lensa suction duct portionA and an exhaust duct portionB. The suction duct portionA communicates a suction port of the undersurface of an armored casewith a suction side of each of the Sirocco fanA,B, and the exhaust duct portionB communicates an exhaust side of each of the Sirocco fansA,B and color lights R, G, B of an optical part. Thereby, a cooling air is blown to the vicinity of each light incident position of the color lights R, G, B of the optical part for approximately the same air quantity, so that the cooling of the optical part is performed

Cooler for electro optic device and projector

An intake opening ( L) is formed on a left lateral side ( ) of a lower cabinet ( ) and an exhaust opening ( R) is formed on a right lateral side ( ) in a rear projector ( ), where a cooling air introduced from the intake opening ( L) by a plurality of fans provided in the lower cabinet ( ) flows along a front side of a screen to cool the interior of the projector to be finally discharged from the exhaust opening ( R), so that the air after cooling the interior which is discharged by the exhaust opening ( R) is prevented from entering into the intake opening ( L), thereby always introducing fresh cooling air to cool the interior efficiently.

In order to provide a rear projector capable of facilitating position adjustment of an image displayed on a screen and optimizing dispersion of the aspect ratio of the projected image caused by tolerance of components by adjusting the position of the image, a support member ( ) is provided with a lateral position adjuster ( ) as a planar position adjusting mechanism attached on a support plate of an interior unit in an opposing manner, an inclination adjuster ( ) as an inclination position adjusting mechanism vertically provided on the lateral position adjuster ( ), and a rotary position adjuster ( ) as a rotary position adjusting mechanism attached to the inclination adjuster ( ) slanted downward toward rear side.

A rear projector ( ) has a closed space ( ) including an inside of an upper cabinet ( ) and an electric optical device ( ), where the electric optical device ( ), a sirocco fan ( ) located below the electric optical device ( ), a duct ( ) covering the upper side of the electric optical device ( ) and a heat sink ( ) attached to the upper cabinet ( ) are disposed and an upper cabinet cooling system ( ) that cools the interior of the closed space ( ) in a circulative manner is provided in the closed space ( ), thereby preventing invasion of duct etc. and providing high-quality image.

A projector is provided in which the production of an outer casing is facilitated, cooling efficiency is maintained well, and the outward appearance is preferable. A dustproof ventilating member is mounted in a clearance formed between the rim of an opening of a front casing forming an outer casing, and a projection lens. For this reason, cooling air can be reliably drawn into a device via the ventilating member. Since this eliminates the necessity for forming a meshed air inlet in the outer casing, the production of the outer casing is facilitated, and the manufacturing operation of the projector is easily performed. Moreover, cooling efficiency is maintained well, and the outward appearance is made preferable.

Projector with dustproof ventilating member

A projection display device permits extension of a space for mounting an electronic component on a control circuit substrate. The projection display device includes a control circuit substrate on which a control circuit is mounted for controlling driving of each of apparatuses in the device according to the input operation signal from an external light receiving unit; and a signal transmission circuit comprising a light emitting element and a light receiving element and provided in a conduction passage on the circuit substrate. The control circuit substrate includes a first circuit substrate on which the control circuit is mounted, and a second circuit substrate provided opposite to the first circuit substrate, and to which the operation signal is input from the external light receiving unit. The light receiving element and the light emitting element are provided on the first circuit substrate and the second circuit substrate, respectively.

Projection display device

Projector

A projector, which has a main body and a plurality of feet protruding from the main body to support the main body, includes a first adjuster that adjusts stepwise the amount of protrusion of at least one of the plurality of feet, and a second adjuster that infinitely and finely adjusts the amount of protrusion of at least one of the plurality of feet. The position of a projection image of the projector can be easily and speedily adjusted by coarsely adjusting the amount of protrusion of the foot by the first adjuster, and then making fine adjustment by the second adjuster.

Growing community of inventors

Matsumoto, Japan

Jun Arai