Sanyo Electric Co., Ltd.

Kenji Yamauchi

Goro Hamagishi

Ryuhei Amano

Hideyuki Kanayama

Ken Mashitani

Atsuhiro Yamashita

Keiichi Kanatani

Masahiro Sakata

Kouji Terami

Naoki Matsushita

Yoshihiko Yano

Satoshi Hosoda

A liquid crystal projector provided with one or a plurality of cooling fans comprises a temperature sensor for sensing the internal temperature of the liquid crystal projector, and a driving control circuit for controlling the driving voltage of the cooling fan on the basis of the temperature sensed by the temperature sensor. A driving control circuit controls the driving voltage of the cooling fan in proportion to the temperature sensed by the temperature sensor in a case where the temperature sensed by the temperature sensor is within a predetermined range.

Liquid crystal projector

The present invention is directed to a three-dimensional display panel capable of viewing a three-dimensional image without using special glasses. The three-dimensional display panel comprises an image display panel having a column of right eye pixels arranged with predetermined spacing in the longitudinal direction on a screen and a column of left eye pixels arranged with predetermined spacing in the longitudinal direction on the screen and so adapted that the column of right eye pixels and the column of left eye pixels are arranged alternately in close proximity to each other in the horizontal direction on the screen and are shifted from each other in the longitudinal direction on the screen to ensure a region where means for switching the respective pixels is formed, and image separating means for separating light from the right eye pixels and light from the left eye pixels to be respectively incident on the right eye and the left eye of a viewer.

Three-dimensional display panel and three-dimensional display using the

A light source device for use in liquid crystal projectors which comprises a reflector oriented toward a liquid crystal panel and having a reflecting surface formed by a paraboloid or ellipsoid, and a light source disposed at the focal position of the reflector. A converter is disposed on an optical axis extending from the light source to the liquid crystal panel for converging light emanating from the light source and reflected from the reflector in accordance with the size of an image display portion of the panel. The reflecting surface of the reflector has a great focal distance so that the spreading angle of the reflected light is not greater than 8 deg.

Light source device for use in liquid crystal projectors

A video projector has first and second projector devices and a display screen. The first projector device is used to project a plurality of first image elements to be perceived by, for example, the right eye of a viewer. The second projector device is used to project a plurality of second image elements to be perceived by, for example, the left eye of the viewer. The first image elements from the first liquid crystal projector device and the second image elements from the second liquid crystal projector device are projected on the display screen. The size of image elements projected on a liquid crystal display panel is adjusted so that the adjacent image elements do not overlap with each other. As a result, interference between adjacent picture elements is substantially eliminated and thus the image quality is improved.

Video projector with a plurality of projection devices

Growing community of inventors

Kishiwada, Japan

Kenji Yamauchi