Sanyo Electric Co., Ltd.

Takashi Miwa

Ryuhei Amano

Takashi Ikeda

Yoshihiro Yokote

Shunichi Kishimoto

Yasuo Funazo

Hideyuki Kanayama

Takaharu Adachi

Hajime Hayama

Katsuhiro Hinotani

Shinichi Okuno

Kazuhiro Kouno

Kazuhiro Arai

Koji Ishii

Yasuo Funazou

Goro Hamagishi

Yukio Mori

Haruhiko Murata

Keiichi Kanatani

Ichiro Takahara

Kenji Oyamada

Tadahiko Yabu

Michihiro Okuda

Kenji Kaneko

Kazuhiro Kono

Shinichi Otsuki

Nobuyuki Kondou

Shinji Shiogai

Kiyoshi Hosoi

Koichi Fujiwara

Takao Matsumura

Shigeru Kobayashi

A projection-type image display device includes an image light generator configured to generate image light, a projection optics configured to project the image light onto a screen. The projection optics includes a reflection mirror configured to reflect the image light toward the screen, the image light outputted from the image light generator. A projection-type image display device includes a protective cover provided on an optical path of the image light reflected by the reflection mirror. The protective cover has a transmissive region transmitting the image light reflected by the reflection mirror.

Projection-type image display device and projection-type image display system

A projection display device comprises a projection lens section to which light modulated by a light modulating element is entered, a mirror section for reflecting the light emitted from the projection lens section to reflect to the projection lens section side and directing the light to a projection plane, and an operation section for displacing a lens in the projection lens section. The operation section is disposed in a region in which the operation section does not hinder an optical path of the light that has been passed through a projection port provided in a main body cabinet.

Projection display device having an operation section for displacing a lens

An optical position of a display device with respect to an optical axis of a projection optical system is displaced in a direction perpendicular to the optical axis in accordance with a change in the size of a projected image. For instance, a transparent flat plate is disposed in front of a projection lens, and the transparent flat plate is tilted in association with a rotation of a zoom adjustment ring. As the transparent flat plate is tilted, the apparent position of the display device relative to the projection lens is displaced in the direction perpendicular to the optical axis of the projection optical system. Thereby, the projected image on a screen is located at a proper position corresponding to a zoom state. Tilt control of the transparent flat plate is realized by a cam mechanism, for instance.

Projection optical system and projection unit for oblique projection type projection display device, and oblique projection type projection display device

There are provided a write light valve for generating image-writing light by modulating write light, a driver for writing images into the write light valve based on image data, read light valves for each color for generating respective color image lights by modulating each received color illumination light, an imaging lens group for guiding the image-writing light emitted from the write light valve to the respective read light valves, a dichroic cube for combining together color image lights emitted from the respective read light valves, a projection lens for projecting each color image light combined together. The imaging lens group has a distortion aberration which reduces or cancels out a distortion aberration of the projection lens.

Projection type video display

A member to be held is held in an external cabinet having a combination of a first cabinet and a second cabinet. A first supporting section is provided in the first cabinet and a second supporting section is provided in the second cabinet. A section to be sandwiched is provided in the member to be held, and the member to be held is held in the external cabinet by sandwiching this section to be sandwiched by the first supporting section and the second supporting section.

Holding structure for holding a member in an external cabinet

A projection display apparatus is provided with a projection distance adjustment mechanism for adjusting a distance between a projection plane and an emitting position of projection light, and provided with a focus adjustment mechanism for making a focus adjustment of a projection image with respect to the projection plane. The focus adjustment mechanism is driven such that a projection image is properly focused onto the projection plane in accordance with the distance between the projection plane and the emitting position.

Projection distance adjustable projection display apparatus

A guide convex portion is formed on a base plate in parallel to an illumination optical axis. Further, a fixed-side supporting member is provided in the base plate. A first opening is formed in an upright portion of the fixed-side supporting member. A slide supporting member can be provided on the base plate. A second opening is formed in the upright portion of the slide supporting member. By inserting a tapered rod into the second opening at its light incidence side and by moving the slide supporting member along the aforementioned guide convex portion, the slide supporting member is stopped at a predetermined position and, at this position, the slide supporting member is fixed.

Rod integrator holder and projection type video display

There is provided a heat conductive portion for conducting heat generated by an LED light source to cooling liquid at a rear side of each LED light source. Each heat conductive portion is connected one another with a pipe, and the cooling liquid flowing in the pipe is sequentially circulated through each heat conductive portion. A heat generation amount of an LED light source for red light is the smallest, the heat generation amount of an LED light source for green light is the largest, and the heat generation amount of an LED light source for blue light is the middle of the two. The cooling liquid cooled by passing through a radiation fin is firstly supplied to the heat conductive portion for the LED light source for red light, secondly supplied to the heat conductive portion for the LED light source for blue light, and lastly supplied to the heat conductive portion for the LED light source for green light. The cooling liquid discharged from a pump is supplied to the heat conductive portion for the heat conductive portion for the LED light source for green light. Then, the cooling liquid from this heat conductive portion passes through the pipe to be supplied to the radiation fin (radiator).

Projection type video display apparatus

A projection-type image display device includes three light sources respectively configured to emit a different colored outgoing light, a light combining unit configured to combine outgoing lights, and a projection unit configured to project a combined light combined by the light combining it. The projection-type image display device includes a first cooler configured to cool a first light source of the three light sources, and a second cooler configured to cool a second and a third light source of the three light sources except the first light source.

Projection-type image display device

An ion wind generator is arranged in the vicinity of a light source. The ion wind generator allows an air flow by negatively ionizing air by corona discharges using negative side needle electrodes, and drawing the negatively-ionized air using a ground side mesh electrode. High-temperature air surrounding the light source is drawn by the air flow and exhausted from an exhaust port at a rear side of a casing. An ozone decomposition catalyst filter is provided in the exhaust port. Ozone (O) is generated by the corona discharges in the ion wind generator. However, the ozone is decomposed by passing through the ozone decomposition catalyst filter provided at the exhaust port.

Projection type image display unit

An ion wind generator () is arranged on one side of a light source (). The ion wind generator () produces an air current by negatively ionizing air by corona discharges at a needle electrode (), or negative side, and drawing the negatively-ionized air at a cylindrical electrode (), or positive side. The air current blows toward the light source () and removes heat generated by the light source (). An ultraviolet ray from the light source () is introduced to a vent of the ion wind generator () by a first dichroic mirror () and a ultraviolet ray reflection mirror (). Though air exhausted from the vent includes ozone (o) produced by corona discharges, the ozone is decomposed by the ultraviolet ray.

Liquid crystal for a right eye and liquid crystal for a left eye are not positioned in one plane, but are positioned to incline at an angle of 5&deg;. To be concrete, both liquid crystal are inclined so that they become closer to the viewer's face as making toward the side of the face from the middle of the forehead. The inclination of liquid crystal as above-described to set the preferential direction of visual view of liquid crystal to be horizontal leads in that the direction by which the high contrast of liquid crystal can be obtained is toward the 3D display. It diminishes a phenomenon like cross-talk and allows the viewer to view the appropriate stereoscopic image. Liquid crystal for a right eye and liquid crystal for a left eye have the same construction. These liquid crystals make contrast with each other and then they are mounted on the liquid crystal shutter glasses portion. This makes it possible for each electrode to position in the center of liquid crystal shutter glasses portion. The construction in which the electric circuit is in the center of the liquid crystal shutter glasses portion makes it easy to make electric contact between the circuit and the electrode.

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Higashiosaka, Japan

Takashi Miwa