Abstract: An image projection apparatus includes a light source that emits light; an image generation element to generate an image; an optical radiation system to irradiate the image generation element using the light emitted from the light source; an optical projection system to project the image generated by the image generation element onto a projection face; a color wheel, disposed on a light path of light emitted from the light source, to separate the light while being rotated; a light tunnel to guide light exiting from the color wheel to the optical radiation system; and a shield disposed in a space between the color wheel and the light tunnel in a light radiation direction from which the light from the light source is irradiated. The shield covers at least a part of a side of the light tunnel facing a rotation center of the color wheel.

Abstract: There are provided a button section; a contact-type switch that is provided in each of a plurality of directions; a button contact area that is provided on the back surface of the button section and that is brought into contact with the switch; a cover section that covers the periphery of the button section; and a flange section that is provided on the outer periphery of the button section and that is in contact with the cover section so as to restrict the button section from being ejected from inside a chassis, wherein the flange section includes cutouts at positions that are opposed to each other with the switch and the center position of the button section interposed therebetween.

Abstract: An image projection apparatus that generates an image based on image data and projects the image, comprises: 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.

Abstract: 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.

Abstract: 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.

Abstract: An auto-focus device includes: a light projection lens unit that projects light emitted from a light source unit, on a projection target surface; a light receiving unit that receives a diffusely-reflected light from the projection target surface; a light receiving lens unit that guides the diffusely-reflected light to the light receiving unit; a calculating unit that calculates a focal distance to the projection target surface from the diffusely-reflected light; a first holding unit that holds the light source unit, the light projection lens unit, and the light receiving lens unit; a second holding unit that holds the light receiving unit, and is mounted on the first holding unit; and a pressing unit that presses the second holding unit against the first holding unit. The second holding unit is configured to be displaceable on a surface of the first holding unit along a groove portion formed thereon.

Abstract: Disclosed is a light source device including a light source that includes a light emitting tube; and a cooler configured to cool the light emitting tube. The cooler includes an inlet port for drawing cooling air for cooling the light emitting tube; a flow channel that extends from the inlet port to the light emitting tube in a horizontal direction and that is for flowing the cooling air toward the light emitting tube; and a baffle plate that is disposed in the flow channel and that can slide in a gravity direction. The baffle plate has a shape and openings such that, in an installation state, an upper portion of the flow channel is opened and a lower portion of the flow channel is closed by the shape and positions of the openings of the baffle plate.

Abstract: A cooling apparatus including an air blow part including an air outtake port; and a heat dissipater including a plurality of heat dissipating fins, wherein an end side of an upper surface of the heat dissipater is linearly aligned, wherein the plurality of heat dissipating fins includes a first heat dissipating area and a second heat dissipating area, wherein a surface area of the heat dissipating fins arranged in the first heat dissipating area is smaller than a surface area of the heat dissipating fins arranged in the second heat dissipating area, wherein the heat dissipating fins are arranged at a position facing the air outtake port of the air blow part.

Abstract: An image projection apparatus includes a casing, a light source unit detachably mounted to the casing, a first connector having a first engagement member, disposed on a housing of the light source unit, a second connector having a second engagement member, disposed on the casing, and one or more supporters disposed at least one of the first connector and the second connector. The first connector is detachably engageable with the second connector. At least one of the first connector and the second connector is moveable in a direction substantially perpendicular to a connection direction of the first connector and the second connector. The one or more supporters guides one of the first engagement member and the second engagement member to the other one of the first engagement member and the second engagement member when engaging the first connector and the second connector.

Abstract: An electronic device includes a speaker; a speaker holder that holds the speaker; a main unit on which the speaker holder is mounted; a first mounting part formed on the speaker; a second mounting part formed on the speaker holder; a first elastic part that engages with both the first and second mounting parts; a third mounting part formed on the speaker holder; a fourth mounting part formed on the main unit; and a second elastic part that engages with both the third and fourth mounting parts. The speaker and the main unit are provided in such a manner as not to come into contact with each other under the condition that the first and second mounting parts engage with the first elastic part, and the third and fourth mounting parts engage with the second elastic part.

Abstract: A light source housing to which a light source lamp having a light emission tube and a reflector is attached includes a pair of flow paths bifurcating onto upper and lower sides of the light emission tube from an air intake port for introducing a cooling air; a flow path open and close unit that slides in a direction of the gravitational force so as to open the flow path on the upper side of the light emission tube and close the flow path on the lower side of the light emission tube; and an air outtake port that outtakes the cooling air introduced into the reflector from the flow path on the upper side of the light emission tube to an outside of the reflector.

Abstract: An image projection apparatus including a light source, a projection unit to project light from the light source, a dust-proof member to protect the projection unit from outside dust and through which light from the light source passes, a light detector provided at an end surface of the dust-proof member to detect reflected light of light projected from the projection unit, the reflected light being internally reflected light trapped within the dust-proof member, and a controller that executes a protective action when the amount of internally reflected light detected by the light detector meets or exceeds a predetermined threshold value.

Abstract: An image projection apparatus includes a housing unit; a light source unit provided on the housing unit; an outer cover mounted on the housing unit; a second cover provided nearer to the light source unit than the outer cover; a first mounting member formed on the housing unit; a second mounting member formed on the outer cover and fixing the outer cover to the housing unit when mounted on the first mounting member; a displacement member movable to both a position where mounting of the second mounting member to the first mounting member is inhibited and a position where mounting of the second mounting member to the first mounting member is permitted; and a displacement control member that moves the displacement member to the position where the mounting of the second mounting member to the first mounting member is permitted when the second cover is correctly mounted.

Abstract: An illumination optical system includes a lens unit that is arranged on a path of an emitted light to an image forming element for forming an image; a holding unit that holds the lens unit; and an elastic body that is attached to the holding unit, and has integrally-formed first and second parts, the first part being biased in a direction of an optical axis of the light to press the lens unit, and the second part being biased in a direction perpendicular to the direction of the optical axis to press the lens unit.

Abstract: An image projection apparatus includes: a light source; an exhaust fan having a rotary shaft provided with at least one blade, the rotary shift being rotated to exhaust air inside the apparatus to the outside of the apparatus; a guide having a sloped face that is sloped toward the exhaust fan, the sloped face having a first side surface facing the light source and a second side surface provided opposite of the first side surface; a first flow path, defined by the first side surface of the guide, to guide air heated by the light source toward the rotary shaft of the exhaust fan; and a second flow path, defined by the second side surface of the guide, to guide air having temperature lower than temperature of the air heated by the light source, toward the rotary shaft of the exhaust fan.

Abstract: A separation device includes at least one separator disposed opposite one of a first rotary body and a second rotary body. Each separator includes a front aligned in an axial direction of the one of the first rotary body and the second rotary body and including a recording medium conveyance face over which a recording medium slides. The recording medium conveyance face includes a front edge produced with a burr having a height not greater than about 25 micrometers. A recess produced on the recording medium conveyance face extends in a direction perpendicular to a recording medium conveyance direction. The recording medium conveyance face has a surface roughness defined by one of an arithmetic average roughness not greater than about 1.5 micrometers, a maximum height not greater than about 10.0 micrometers, and a ten point average roughness not greater than about 7.2 micrometers.

Abstract: A projection optical device to project an image on a projection plane, includes a reflection mirror, a plurality of projection lenses, a projection lens supporting member to support the plurality of projection lenses, and a position-arrangement member provided at the projection lens supporting member to arrange the reflection mirror at a predefined position on the projection lens supporting member.

Abstract: An image projection apparatus includes: a light source; an exhaust fan having a rotary shaft provided with at least one blade, the rotary shaft being rotated to exhaust air inside the apparatus to the outside of the apparatus; a guide having a sloped face that is sloped toward the exhaust fan, the sloped face having a first side surface facing the light source and a second side surface provided opposite of the first side surface; a first flow path, defined by the first side surface of the guide, to guide air heated by the light source toward the rotary shaft of the exhaust fan; and a second flow path, defined by the second side surface of the guide, to guide air having temperature lower than temperature of the air heated by the light source, toward the rotary shaft of the exhaust fan.

Abstract: An image projection apparatus includes: a light source; an exhaust fan having a rotary shaft provided with at least one blade, the rotary shaft being rotated to exhaust air inside the apparatus to the outside of the apparatus; a guide having a sloped face that is sloped toward the exhaust fan, the sloped face having a first side surface facing the light source and a second side surface provided opposite of the first side surface; a first flow path, defined by the first side surface of the guide, to guide air heated by the light source toward the rotary shaft of the exhaust fan; and a second flow path, defined by the second side surface of the guide, to guide air having temperature lower than temperature of the air heated by the light source, toward the rotary shaft of the exhaust fan.

Abstract: An image projection apparatus includes: a grid portion provided on a housing of the apparatus and having a plurality of grids through which air flows in or out of the apparatus. The grid portion includes an edge portion of the grid portion, and a central portion of the grid portion, having a thickness thicker than a thickness of the edge portion of the grid portion.