Abstract: 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.

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: 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.

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 light source in which a light emitting material emits light through an electric discharge between electrodes; an image forming unit that modulates an intensity of the light emitted from the light source to form an image; a cooling fan that cools the light source; an input unit that receives an input of an instruction signal for turning off a power source of the image projection apparatus; a voltage detector that detects a voltage value of the light source in lighting; a voltage value determining unit that determines whether the voltage value detected by the voltage detector is less than a preset threshold value when the input unit receives the instruction signal; and a cooling fan controller that performs an after-cooling operation of driving the cooling fan to cool the light source when the voltage value is less than the threshold value.

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: An image projection apparatus includes an optical part disposed in a light path of an projection image; an enclosing unit to enclose the light path of the projection image and having an window for projecting the projection image onto a projection plane; and an air supply unit to supply air into an internal space of the enclosing unit enclosing the light path. Pressure of the internal space of the enclosing unit is kept at a positive pressure with respect to an external pressure of the enclosing unit during an image projection operation.

Abstract: An image projection apparatus includes a light source configured to cause a light-emitting material to emit light by an electric discharge between a pair of electrodes; an image forming unit configured to form an image by modulating intensity of the light emitted from the light source; a receiving unit configured to receive a power-off input that triggers stopping power supply to the image projection apparatus; and an electric-power control unit configured to increase electric power supplied to the electrodes before stopping power supply to the image projection apparatus when the receiving unit receives the power-off input.

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 light source in which a light emitting material emits light through an electric discharge between electrodes; an image forming unit that modulates an intensity of the light emitted from the light source to form an image; a cooling fan that cools the light source; an input unit that receives an input of an instruction signal for turning off a power source of the image projection apparatus; a voltage detector that detects a voltage value of the light source in lighting; a voltage value determining unit that determines whether the voltage value detected by the voltage detector is less than a preset threshold value when the input unit receives the instruction signal; and a cooling fan controller that performs an after-cooling operation of driving the cooling fan to cool the light source when the voltage value is less than the threshold value.

Abstract: An image displaying apparatus including a light source, a light condenser for condensing light to form a condensed light image, a light mixing element, a reflective image displaying element having plural micro-mirrors for changing an inclination angle of an individual micro-mirror between an on-state and an off-state, an illumination optical system including a condenser lens and a mirror for illumination, and a projection optical system for projecting reflected light from a micro-mirror being at an on-state among plural micro-mirrors constituting the reflective image displaying element, wherein the mirror for illumination is at a position nearest the reflective image displaying element on an optical path from the light mixing element to the reflective image displaying element and a reflection surface of this mirror for illumination is positioned at a side of the reflective image displaying element with respect to a projection lens system constituting a part of the projection optical system.

Abstract: An image projection apparatus includes an optical part disposed in a light path of an projection image; an enclosing unit to enclose the light path of the projection image and having an window for projecting the projection image onto a projection plane; and an air supply unit to supply air into an internal space of the enclosing unit enclosing the light path. Pressure of the internal space of the enclosing unit is kept at a positive pressure with respect to an external pressure of the enclosing unit during an image projection operation.

Abstract: An image projection apparatus includes a light source configured to cause a light-emitting material to emit light by an electric discharge between a pair of electrodes; an image forming unit configured to form an image by modulating intensity of the light emitted from the light source; a receiving unit configured to receive a power-off input that triggers stopping power supply to the image projection apparatus; and an electric-power control unit configured to increase electric power supplied to the electrodes before stopping power supply to the image projection apparatus when the receiving unit receives the power-off input.

Abstract: An image displaying apparatus including a light source, a light condenser for condensing light to form a condensed light image, a light mixing element, a reflective image displaying element having plural micro-mirrors for changing an inclination angle of an individual micro-mirror between an on-state and an off-state, an illumination optical system including a condenser lens and a mirror for illumination, and a projection optical system for projecting reflected light from a micro-mirror being at an on-state among plural micro-mirrors constituting the reflective image displaying element, wherein the mirror for illumination is at a position nearest the reflective image displaying element on an optical path from the light mixing element to the reflective image displaying element and a reflection surface of this mirror for illumination is positioned at a side of the reflective image displaying element with respect to a projection lens system constituting a part of the projection optical system.

Abstract: One color segment is selected from among a plurality of color segments. A lamp lighting circuit is controlled so that a lamp pulse is superimposed on a DC lamp current during a time period during which a light projected from a lamp transmits through the selected color segment.

Abstract: The invention provides a projection type image-displaying system in which a user can readily adjust brightness and color purity of a projected image, a projection type image-displaying apparatus, and a lamp lighting-controlling method. A projector apparatus (10) recognizes an apparatus (a PC apparatus (30) or a recording/reproducing apparatus (40)) connected to the projector apparatus (10), and a user or designer selects an image mode menu corresponding to an image signal input and causes the image mode menu thus selected to be displayed on a screen (50). As a result, when a projection type image-displaying system is used, the user or designer can readily and intuitively adjust brightness and color purity in order to obtain ones which he/she likes while looking at an image displayed on the screen (50).

Abstract: One color segment is selected from among a plurality of color segments. A lamp lighting circuit is controlled so that a lamp pulse is superimposed on a DC lamp current during a time period during which a light projected from a lamp transmits through the selected color segment.

Abstract: A method of producing Nb3Sn superconducting wire, including the steps of: preparing a plurality of Sn modules obtained by burying Sn-based metal cores in a Cu-based metal matrix and a plurality of Nb modules obtained by burying Nb-based metal filaments in a Cu-based metal matrix; bundling the Nb modules and the Sn modules such that the Nb modules surround the Sn modules and obtaining an assembly; inserting the assembly in a tubular member of Cu-based metal which internally comprises tube-like shaped Ta-based metal or Nb-based metal which serves as a diffusion barrier and obtaining a composite; drawing the composite; and heat-treating the composite.

Abstract: A color wheel is provided with a plurality of color filters, a rotatable shaft to which the color filters are attached to form a disk, and a reinforcing ring covering an outer circumference of the disk of the filters, for reinforcement.

Abstract: According to one embodiment, a light-source lamp is provided with a reflector, a light-emission tube, a support member and a heat radiation member. The reflector includes a cylindrical portion located in the center thereof. The light-emission tube includes a base located at one end. The base extends through the cylindrical portion of the reflector, with a predetermined distance maintained with respect to the inner surface of the cylindrical portion, and is projected behind the reflector. The support member couples the light-emission tube and the reflector together and includes a side portion having an air discharge hole formed at a predetermined position thereof. The heat radiation member is attached to the base of the light-emission tube and covers the air discharge hole of the support member. The heat radiation member has holes smaller than the air discharge hole.