Abstract: A projector includes a light modulation device; a projection lens; a hermetic housing; a projector housing containing the hermetic housing; a heat exchanger; an air guide wall being located in the hermetic housing and partitioning the air guide passage from a main space containing the light modulation device, the air guide wall including: a communication part adjoining the heat exchanger and providing communication between the air guide passage and the main space, and an opening functioning as an inlet for guiding air from the main space into the air guide passage after the air has passed through the heat exchanger; and a fan located at the inlet so as to introduce the air in the main space into the air guide passage, to guide the air in the air guide passage to the communication part, and to blow the air from the communication part to the heat exchanger.

Abstract: A projector includes a light modulation device; a projection lens; a hermetic housing; a projector housing containing the hermetic housing; a heat exchanger; an air guide wall located in the hermetic housing and partitioning the air guide passage from the main space containing the light modulation device, the air guide wall including: a communication part adjoining the heat exchanger and providing communication between the air guide passage and the main space, and an opening functioning as the inlet for guiding air from the main space into the air guide passage after the air has passed through the heat exchanger; and a sirocco fan located at the inlet so as to introduce the air in the main space into the air guide passage, to guide the air in the air guide passage to the communication part, and to blow the air from the communication part to the heat exchanger.

Abstract: A light source device includes a light source having a light emitting element, a thermal conductor, an optical system housing, and a cooler. The thermal conductor has a first surface and a second surface, and the light source is thermally connected to the first surface. The optical system housing has a mounting part with an opening. The thermal conductor is fixed to the optical system housing in a state that the first surface is disposed in a direction facing the mounting part and the light emitting element is disposed at a position facing the opening. The cooler is thermally connected to the second surface of the thermal conductor and cools heat from the light source.

Abstract: LED modules (1R, 1G, 1B) for respectively emitting red, green and blue colors of light, illumination optical systems (2R, 2G, 2B) for guiding light from the LED modules, and a liquid crystal panel (7) for modulating the light from the LED modules guided by the illumination optical systems on the basis of an image signal are placed. The LED modules are provided with respective cooling units connected to the backside thereof through spreaders (11R, 11G, 11B) as thermal conductive members. Only the cooling device for the red LED module (1R) is formed by using a red Peltier device (12) as a thermoelectric element capable of controlling heating and absorbing heat. Efficient temperature control by appropriately using a Peltier device for cooling the plurality of solid light sources that emit colors of light different from each other becomes possible.

Abstract: LED modules 1R, 1G, 1B for respectively emitting red, green and blue colors of light, illumination optical systems 2R, 2G and 2B for guiding light from the LED modules, and a liquid crystal panel 7 for modulating the light from the LED modules guided by the illumination optical systems on the basis of an image signal are placed. The LED modules are provided with respective cooling units connected to the backside thereof through spreaders 11R, 11G and 11B as thermal conductive members. Only the cooling device for the red LED module 1R is formed by using a red Peltier device 12 as a thermoelectric element capable of controlling heating and absorbing heat. Efficient temperature control by appropriately using a Peltier device for cooling the plurality of solid light sources that emit colors of light different from each other becomes possible, and an increase in the size of the cooling system and power losses can be suppressed.

Abstract: A light source apparatus includes a lamp, an ellipsoidal mirror collecting a part of light radiated from a light transmission plane of the lamp, and a spherical mirror collecting another part of the light radiated from a light transmission plane not collected by the ellipsoidal mirror and reflecting it on the ellipsoidal mirror, in which a reflection plane of the ellipsoidal mirror and the reflection plane of the spherical mirror are in a form of non-rotation symmetry to an optical axis connecting a focal position F1 corresponding to a source of luminescence of the lamp to a focal position F2 of the light collected by the ellipsoidal mirror respectively. The distance between the reflection plane of the spherical mirror and the source of luminescence of the lamp is shorter than the distance between the source of luminescence and the focus of the light collected by the ellipsoidal mirror, and a part of the reflection plane of the ellipsoidal mirror is formed around the optical axis.

Abstract: A light source apparatus includes a lamp, an ellipsoidal mirror collecting a part of light radiated from a light transmission plane of the lamp, and a spherical mirror collecting another part of the light radiated from a light transmission plane not collected by the ellipsoidal mirror and reflecting it on the ellipsoidal mirror, in which a reflection plane of the ellipsoidal mirror and the reflection plane of the spherical mirror are in a form of non-rotation symmetry to an optical axis connecting a focal position F1 corresponding to a source of luminescence of the lamp to a focal position F2 of the light collected by the ellipsoidal mirror respectively. The distance between the reflection plane of the spherical mirror and the source of luminescence of the lamp is shorter than the distance between the source of luminescence and the focus of the light collected by the ellipsoidal mirror, and a part of the reflection plane of the ellipsoidal mirror is formed around the optical axis.

Abstract: A projection display device includes a condensing unit and a shading unit. The condensing unit condenses light emitted from a light source to form a condensed spot on a color wheel. The shading unit, when a size of the condensed spot on the color wheel has increased due to an increase in light emission of the light source, shades a portion of the light passing through the color wheel corresponding to the increased size.

Abstract: A field sequential color display device includes a color wheel assembly. The color wheel assembly has a color wheel which is divided into a plurality of color regions and a motor for rotating the color wheel. The motor contains a sensor for detecting rotation of the motor and the sensor outputs at least one pulse per one revolution of the motor. The color wheel assembly also has a spatial light modulator for displaying image data that is driving in synchronization with the pulse output by the sensor.

Abstract: A field sequential color display device includes a color wheel assembly. The color wheel assembly has a color wheel which is divided into a plurality of color regions and a motor for rotating the color wheel. The motor contains a sensor for detecting rotation of the motor and the sensor outputs at least one pulse per one revolution of the motor. The color wheel assembly also has a spatial light modulator for displaying image data that is driving in synchronization with the pulse output by the sensor.

Abstract: A projection lens shifting mechanism comprises a projection lens unit in the shape of a cylinder for projecting incoming image light, a flange integrated with the projection lens unit, a projection lens mount for providing light emitted from a light valve in the shape of a plane to the projection lens unit, wherein the light valve can be optically modulated for each pixel based on image information, and the projection lens mount is concentric to an optical axis of the light emitted from the light valve, a first cam follower provided in the flange along an optical axis of the projection lens unit, a cam follower guiding portion provided in the projection lens mount for guiding the first cam follower in a direction perpendicular to the optical axis of the projection lens unit, a first lens shifting cam capable of being moved in a predetermined direction with respect to the projection lens mount and engaged with the first cam follower, for shifting the first cam follower in a direction guided by the cam follower

Abstract: A projection lens shifting mechanism comprises a projection lens unit in the shape of a cylinder for projecting incoming image light, a flange integrated with the projection lens unit, a projection lens mount for providing light emitted from a light valve in the shape of a plane to the projection lens unit, wherein the light valve can be optically modulated for each pixel based on image information, and the projection lens mount is concentric to an optical axis of the light emitted from the light valve, a first cam follower provided in the flange along an optical axis of the projection lens unit, a cam follower guiding portion provided in the projection lens mount for guiding the first cam follower in a direction perpendicular to the optical axis of the projection lens unit, a first lens shifting cam capable of being moved in a predetermined direction with respect to the projection lens mount and engaged with the first cam follower, for shifting the first cam follower in a direction guided by the cam follower

Abstract: The present invention provides a color wheel assembly comprising a color wheel which is divided into plural color regions, and a motor for rotating the color wheel, in which the position of the color wheel can be detected accurately even at high-speed rotation or at elevated temperatures. A Hall IC 27 as a magnetic sensor is provided inside of a motor 2. Every time a detecting magnet 28 which is provided at a rotor part 6 rotates and passes through the Hall IC 27 as the magnetic sensor, a pulse signal is generated by magnetoelectric conversion characteristics of the Hall IC 27, thereby generating a pulse signal for detecting the position of the color wheel 1 only with the color wheel 1 and the motor 2 for rotating the color wheel.

Abstract: A magnetic recording and reproducing system including a reel base for supplying or taking up a tapelike magnetic recording medium, and a tension band for braking the reel base, which is wound around the reel base through a predetermined angle. First and second retainers are provided for holding opposite ends of the tension band, respectively. The first and second retainers are pivotally attached to a pivotal tension arm. The tension arm has a tension post so that the magnetic recording medium is brought into sliding contact with the tension post. An urging member is provided for adjusting the tension of the magnetic recording medium to a desired value. The system also includes a control member which has a contact portion capable of being brought into contact with a guide portion of the second retainer.

Abstract: An image recording apparatus having an exposure unit, a pressure developing unit and a thermal fixing unit. The apparatus employs a separate type image recording mediums including a microcapsule sheet and a separate developer sheet. The thermal fixing unit applies heat to the developer sheet carrying an output image thereon. A heat application means of the thermal fixing unit is positioned spaced away from the imaging surface of the developer sheet for avoding direct contact therewith.

Abstract: An image forming apparatus for forming an image on a photosensitive recording medium by exposing the photosensitive recording medium to light by way of a mask member which is placed on an exposure station. The apparatus comprises a first transport device which transports the mask member through the exposure station and a second transport device which transports the photosensitive recording medium through the exposure station. A first exposure unit irradiates light upon the photosensitive record medium by way of said mask member at the exposure station to record an image formed on the mask member on the photosensitive recording medium. Alternatively, when a mask member is not used, a second exposure unit directs light through an auxiliary member having a light-passing image thereon to project and record the light-passing image onto the photosensitive recording medium.

Abstract: An image forming apparatus capable of forming an image on a photosensitive recording medium employs a plurality of mask members for exposure prepared on the basis of image data representing the image. The mask members are to be registered sequentially at an exposure position on the photosensitive recording medium. The image forming apparatus comprises a supporting unit for supporting the mask members, the supporting unit being transported from an initial position to a different position including the exposure position, and a moving unit for moving the supporting unit to position the mask member in the exposure position, while the supporting unit is being transported from the initial position to the selected position including the exposure position. An exposure unit exposes the photosensitive recording medium through the mask member positioned in the exposure position.

Abstract: An image forming apparatus forms an image on a photosensitive recording medium by sequentially exposing light using each of plural mask members to form a component part of the image. A positioning mark is formed on each mask member. The apparatus comprises a mask member moving unit for moving the mask member and a sensing unit including a sensor for sensing the positioning mark and a supporting member formed so that a lower portion of the supporting member comes into contact with the mask member. The apparatus further comprises a controlling unit for controlling said mask member moving unit so that the mask member may be moved to a predetermined position on the photosensitive recording medium on the basis of a signal from the sensor. The sensing unit includes a recess corresponding to each sensor location. The distance between the sensor and the mask member can always be kept constant through the supporting member, because the supporting member comes into contact with the mask member.

Abstract: An image recording apparatus using a set of mask members and having mask position adjusting device. A transparent mask member supporting plate is provided at the exposure position. Each of the mask member is delivered upon the mask member supporting plate by two pairs of rollers. In this mask delivery, a mask image surface faces upwardly. An elongated photosensitive recording medium is positioned immediately above the mask member supporting plate so as to guide the medium at the exposure position. Further, an exposure device including a light source and color filters is positioned below the mask member supporting plate. The mask member undergoes positional adjustment at the exposure position. For this, the mask member supporting plate is supported on a positioning frame which is movable in a direction perpendicular to the mask member moving direction.

Abstract: A device for automatically loading an image recording apparatus with a web of a photosensitive recording medium includes a first belt for conveying a mask original into an exposure unit, and a mechanism facing the belt and movably supported on a frame so as to be movable toward and away from the first belt. The mechanism and the belt define therebetween a path along which the web travels. The mechanism includes at least a pair of spaced rollers, and a second belt entrained by the rollers. Cams are provided for moving the mechanism to bring the second belt into intimate contact with the first belt, so that the leading end of the web may be held between the two belts. The first belt is moved to enable the web to travel along its path. The web is further conveyed to a predetermined position where the leading end of the web is in sliding contact with the peripheral surface of a take-up roller. Since the take-up roller carries an adhesive layer on the periphery thereof, the web is wound around the take-up roller.