Sanyo Electric Co., Ltd.

Ricoh Optical Industries Co., Ltd.

Vision3d Technologies, LLC

Ryuhei Amano

Takashi Ikeda

Takashi Miwa

Yoshihiro Yokote

Hideyuki Kanayama

Shinichi Okuno

Kazuhiro Arai

Takaharu Adachi

Tetsuya Enomoto

Kenji Taima

Haruhiko Murata

Masutaka Inoue

Akihiro Maenaka

Satoshi Takemoto

Teruhiro Yamada

Osamu Nagase

Yoshitsugu Kohno

Michihiro Okuda

Kenji Yamauchi

Ken Mashitani

Goro Hamagishi

Shinya Matsumoto

Keiichi Kanatani

Takahisa Ando

Takeshi Hachiya

Kazuhisa Takahashi

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

An image signal storing unit stores an image signal provided from the outside. An image processing unit appropriately processes the image signal stored in the image signal storing unit in accordance with the instruction from an adjusting unit. A projecting unit projects, onto a display area, light corresponding to an image created by the image processing unit. A display size determination unit computes the display size of the picture plane displayed on a screen based on an image captured by the camera provided adjacent to the projection-type video-image display device. The display size determination unit then determines whether or not the display size of the picture plane is equal to or larger than a predetermined upper-limit size.

Stereoscopic display device projecting parallax image and adjusting amount of parallax

Disclosed are a projection display apparatus and a projection optics provided in the projection display apparatus. The projection optics has a refractive optics and a reflective optics. In the refractive optics, a lens (non-circular lens) provided on a reflective optics side has a non-circular shape forming part of an imaginary circular region whose center is an optical axis center of the refractive optics. In other words, the non-circular lens has a shape of a cut-out portion of an imaginary circular lens having an optical axis center coinciding with the optical axis center of the refractive optics.

Refractive optics and projection display apparatus

In a projection display device, a polarization converting element is provided between an imager and a refracting optical system for converting a polarization direction of light after modulation into a direction radially extending from the center of the optical axis of the refracting optical system. Light transmitted through the polarization converting element is incident onto the refracting optical system in a state of P-polarized light or a state close to the state of P-polarized light. Thereby, the transmittance of light through the refracting optical system is made substantially uniform and increased.

Projection display device

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

A projection display device includes an imager which modulates light from a light source based on an image signal; a projection optical system which enlarges and projects the light modulated by the imager onto a projection plane; and a shift mechanism which displaces the imager in a direction intersecting with an optical axis of the projection optical system. The projection optical system and the shift mechanism are co-mounted on a base member.

Projection display device with shift mechanism for displacing an imager

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

A projection display device has an imager that modulates light from a light source in accordance with an image signal, a projection optical system that enlarges and projects the light modulated by the imager onto a projection plane, a focus adjustment part disposed in the projection optical system, and a displacement part that displaces the imager in a direction vertical to a light axis of the projection optical system, in conjunction with the focus adjustment part.

Projection display device that displaces an optical position of an imager in conjunction with a focus adjustment

A projection optical system includes a first refracting optical system having a plurality of lenses, a first reflecting optical system, and a second reflecting optical system. The first reflecting optical system is disposed on a side of a projection port with respect to an optical axis of the first refracting optical system, and has a positive optical power to reflect light incident through the first refracting optical system in a direction opposite to the side of the projection port. The second reflecting optical system is operable to reflect the light reflected on the first reflecting optical system toward the projection port.

Projection optical system and 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.

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Hirakata, Japan

Ryuhei Amano