Ricoh Company, Ltd.

Jun Mashimo

Tetsuya Fujioka

Hideo Kanai

Satoshi Tsuchiya

Yasunari Mikutsu

Akihisa Mikawa

Yukimi Nishi

Takahiro Hiramatsu

Yoshito Saito

Yoshio Kubo

Takehiro Nishimori

Kasumi Nakamura

Momotaro Yoshida

An image projection apparatus includes a first light source to emit a first excitation light of a specific wavelength, a second light source to emit a second excitation light of a specific wavelength, a first planar wavelength conversion element to convert the first excitation light into a light of a different specific wavelength, and a second planar wavelength conversion element to convert the second excitation light into a light of a specific wavelength different from the specific wavelength of the first excitation light converted by the first planar wavelength conversion element. In the image projection apparatus, the first planar wavelength conversion element and the second planar wavelength conversion element are arranged at positions different from each other, and the first planar wavelength conversion element and the second planar wavelength conversion element have a first plane and a second plane.

Image projection apparatus

A projection apparatus includes a main body configured to project and display an image from a projection port of the main body; and an operation detection apparatus detachably attached to the main body and configured to acquire operation information relating to an operation on a projection screen performed by an operator. The main body includes an attachment portion provided on a surface of the main body on which the projection port is provided. The attachment portion is a portion where the operation detection apparatus attached to the main body.

Projection apparatus and operation detection apparatus

A light source module including a phosphor wheel having a phosphor layer to emit fluorescence when excited with light emitted from a light source; and a drive section disposed on a phosphor-layer side of the phosphor wheel, the drive section configured to rotate the phosphor wheel.

Light source module, optical device, and method for producing light source module

An image projection apparatus includes a light source, an image generation unit configured to receive light from the light source and generate an image based on the received light, a projection optical system unit configured to project the image generated by the image generation unit, a heat dissipation unit configured to dissipate heat of the image generation unit, and a movable member configured such that a position of the movable member is movable relative to the projection optical system unit, wherein the image generation unit and the heat dissipation unit are mounted on the movable member.

Image formation unit and image projection apparatus

A light source device includes a first light-source unit, a second light-source unit, and a third light-source unit emitting light of spectra different from each other. Each of the first through third light-source units includes a heat dissipator and a light source. The light source includes a light emitting device. The heat dissipators of the first through third light-source units are disposed in an ascending order of values of T/Q of the first through third light-source units, in a direction of cooling air flow. 'Q' represents a heat generation amount from the light source of each of the first through third light-source units, when the light sources are driven to obtain predetermined light intensity and lifespan. 'T' represents a preset, upper-limit temperature for the light emitting device of each of the first through third light-source units to obtain the predetermined light intensity and lifespan.

Light source device, image projector, and method for disposing light source device

A holding structure holds a reflecting mirror. The holding structure includes a reflecting mirror bracket holding the reflecting mirror; a protrusion disposed on the reflecting mirror; a protrusion supporting part disposed on the reflecting mirror bracket and supporting the protrusion; and a spacer disposed between the protrusion supporting part and the reflecting mirror bracket.

Holding structure for holding reflecting mirror, projection optical system unit, optical engine, and image projecting apparatus

An image projection apparatus that generates an image based on image data and projects the image, includes: an image generation element that uses light emitted from a light source to generate an image; a holding unit that rotatably holds the image generation element; and an illumination optical unit that includes one or more optical systems and a light tunnel that is a tubular member surrounding part of a light path from the light source to the image generation element and reflects the light by an inner surface thereof, and that projects the light passing through the light tunnel toward an entire area of a rotatable range of the image generation element.

There is provided a image projection apparatus including an image generation unit for generating an image by using light emitted from a light source, comprising: a movable unit configured to hold the image generation unit and to be able to change a position of the image generation unit; and a drive unit configured to drive the movable unit to move, wherein the movable unit is disposed to move horizontally.

High resolution image projection apparatus with horizontally actuated image generation unit

An image projection device includes: an image generating unit that includes an optical modulation element generating an image using light emitted from a light source; an illumination optical unit that includes one or more optical elements guiding the light emitted from the light source to the image generating unit; a projecting unit that projects the image generated by the image generating unit; a first control unit that performs control to move the image generating unit movable with respect to the illumination optical unit; and a second control unit that performs control to move an illumination area indicating an area illuminated with the light guided to the image generating unit by the illumination optical unit according to a movement amount of the image generating unit.

Image projection device and image projection method to control an illumination area based on movement of image generating unit

A projection lens unit includes a plurality of lenses configured to transmit and emit image light generated by an image generating unit using light from a light source; a barrel configured to hold the plurality of projection lenses; and a heat radiator disposed on the barrel and configured to radiate heat of the barrel to an outside.

Projection lens unit, optical engine, and image projecting apparatus

An image projection apparatus includes an image generator configured to use light emitted from a light source to generate an image; a movable member in which the image generator is disposed, the movable member being movably supported; a fixed member being fixed and configured to movably support the movable member; and a mover configured to move the movable member. The mover includes a first pair of actuators facing each other in a first direction across the image generator, and a second pair of actuators facing each other in the second direction across the image generator. The first pair of actuators causes a driving force to operate on the movable member in a direction parallel to a second direction orthogonal to the first direction. The second pair of actuators causes a driving force to operate on the movable member in a direction parallel to the first direction.

An illumination optical system is provided that is configured to guide light emitted from a light source to an image generation unit that is arranged to be movable in a direction perpendicular to incoming light and is configured to generate an image by reflecting the incoming light. The illumination optical system includes a first lens that is arranged to be movable in a direction perpendicular to an optical axis of the first lens, a second lens that is arranged to be movable in a direction that changes a face-to-face distance between the first lens and the second lens, and a lens position control unit configured to displace the first lens and the second lens.

Illumination optical system, optical engine, and image projection apparatus

Disclosed is a cooling device including a blower including an exhaust port; and a radiator including heat radiation fins, wherein the heat radiation fins include a first heat dissipation area and a second heat dissipation area, wherein a first surface area of the heat radiation fins disposed in the first heat dissipation area is greater than that of the heat radiation fins disposed in the second heat dissipation area, wherein the exhaust port of the air blowing part includes first and second exhaust areas for exhausting cooling air, wherein an amount of the cooling air exhausted from the second exhaust area is greater than that of the first exhaust area, and wherein the first heat dissipation area is disposed in the first exhaust area, and the second heat dissipation area is disposed in the second exhaust area.

Growing community of inventors

Tokyo, Japan

Jun Mashimo