Abstract: A projector 10 includes an image forming panel 14 on which an image is formed, and a projection lens 15 which projects the image of the image forming panel 14 onto a screen 20. The center of the image forming panel 14 is fixed with being shifted in a direction opposite to a direction, in which a central position of a projection surface of the screen 20 is deviated with respect to an optical axis L of the projection lens 15. A lens barrel 31 of the projection lens 15 has an opening 34 as a heat release structure which is formed in a portion of a lens barrel 31 in a direction, in which the image forming panel 14 is shifted, on the image forming panel 14 side from a diaphragm position 32 where an F-Number of the projection lens 15 is determined.

Abstract: In a case where an image forming panel is disposed to be shifted with respect to an optical axis of a projection lens having a lens barrel holding the lens, in the lens barrel, the increase in temperature in a first part on a side to which the image forming panel is shifted is larger than that in a second part on an opposite side. A temperature adjustment section includes a cooling duct, a heating duct, a connecting duct, and blowers 27 and. Air, which is suctioned from an inlet of the cooling duct, is passed through the first part, a light source, and the second part, sequentially by the blowers. The air cools down the first part, and heats the second part. Thereby, the temperature distribution in the circumferential direction of the lens barrel becomes uniform, and deterioration of the projected image is suppressed.

Abstract: A projector includes an image forming panel 14 on which an image is formed, and a projection lens 15 which projects the image of the image forming panel 14. In a projector in which the center of the image forming panel 14 is fixed with being shifted in a direction opposite to a direction in which a central position of the projected image of the image forming panel 14 is deviated with respect to an optical axis L of the projection lens 15, a lens barrel 31 of the projection lens 15 includes heater 33 for heating a lens barrel portion on a side opposite to a direction, in which the image forming panel 14 is shifted, on the image forming panel 14 side from the diaphragm position 32 where an F-Number of the projection lens is determined. Cooler may be provided in place of the heater.

Abstract: The present invention relates to a semiconductor device capable of providing extensibility in the entry direction and bit direction of a search table. The semiconductor device includes: a block search circuit that searches each of a plurality of block tables into which a search table, which is configured in the entry direction and in the bit direction, is divided in the entry direction and in the bit direction; a circuit that combines the search results of the block search circuits in the bit direction; and a control circuit that inputs a search key as well as the outputs of the combining circuits, and outputs hit information.

Abstract: A projector 10 includes an image forming panel 14 on which an image is formed, and a projection lens 15 which projects the image of the image forming panel 14 onto a screen 20. The center of the image forming panel 14 is fixed with being shifted in a direction opposite to a direction, in which a central position of a projection surface of the screen 20 is deviated with respect to an optical axis L of the projection lens 15. A lens barrel 31 of the projection lens 15 has an opening 34 as a heat release structure which is formed in a portion of a lens barrel 31 in a direction, in which the image forming panel 14 is shifted, on the image forming panel 14 side from a diaphragm position 32 where an F-Number of the projection lens 15 is determined.

Abstract: A projector includes an image forming panel 14 on which an image is formed, and a projection lens 15 which projects the image of the image forming panel 14. In a projector in which the center of the image forming panel 14 is fixed with being shifted in a direction opposite to a direction in which a central position of the projected image of the image forming panel 14 is deviated with respect to an optical axis L of the projection lens 15, a lens barrel 31 of the projection lens 15 includes heater 33 for heating a lens barrel portion on a side opposite to a direction, in which the image forming panel 14 is shifted, on the image forming panel 14 side from the diaphragm position 32 where an F-Number of the projection lens is determined. Cooler may be provided in place of the heater.

Abstract: A PBS sheet is curved into a partially cylindrical shape so as to be concave or convex toward a panel surface along a central axis which is perpendicular to both an incident light axis of illumination light and a reflection light axis perpendicular to the incident light axis. The illumination light from a light source is converted into s-polarized light by a polarization converting system, and energy distribution thereof is made uniform by a rod integrator. Then, the illumination light is sequentially split into three color lights, R, G, and B, by a color wheel. The illumination light is approximately totally reflected on the PBS sheet, and applied toward a liquid crystal display panel. The illumination light having been reflected on the PBS sheet illuminates the panel surface with neither too large nor too small illumination range. The R, G, and B component images having been reflected on the panel surface are sequentially projected on a screen so as to be observed as a full color image.

Abstract: A projection lens unit includes: a projection lens having a first optical system for focusing incident image light and also having a second optical system for magnifying and projecting the image light focused by the first optical system; a lens barrel member for accommodating the projection lens and having a small diameter portion in which a joining portion of the first and the second optical system is formed to be the thinnest; a holding member having a first holding face on which the small diameter portion is mounted; and a presser member having a second holding face which holds the small diameter portion together with the first holding face. The holding member is fixed to a housing on which the projection lens unit is mounted. The presser member does not protrude upward from the lens barrel member arranged in a dead space of the small diameter portion.

Abstract: A PBS sheet is curved into a partially cylindrical shape so as to be concave or convex toward a panel surface along a central axis which is perpendicular to both an incident light axis of illumination light and a reflection light axis perpendicular to the incident light axis. The illumination light from a light source is converted into s-polarized light by a polarization converting system, and energy distribution thereof is made uniform by a rod integrator. Then, the illumination light is sequentially split into three color lights, R, G, and B, by a color wheel. The illumination light is approximately totally reflected on the PBS sheet, and applied toward a liquid crystal display panel. The illumination light having been reflected on the PBS sheet illuminates the panel surface with neither too large nor too small illumination range. The R, G, and B component images having been reflected on the panel surface are sequentially projected on a screen so as to be observed as a full color image.

Abstract: Disclosed is a technique that prevents the inclination of a lens barrel in a downward direction and does not hinder a reduction in size. A pair of sliding portions that slides along slide shafts is provided on both sides of a plate-shaped flange in which an opening for attaching a lens barrel is provided. The sliding portions are formed at different heights. Circular through holes through which the columnar slide shafts pass are formed in the sliding portions to extend in the height direction. When the sliding portions slide along the slide shafts, the flange is shifted in the height direction. The lens barrel attached to the flange is shifted in the height direction together with the flange.

Abstract: A projection lens unit includes: a projection lens having a first optical system for focusing incident image light and also having a second optical system for magnifying and projecting the image light focused by the first optical system; a lens barrel member for accommodating the projection lens and having a small diameter portion in which a joining portion of the first and the second optical system is formed to be the thinnest; a holding member having a first holding face on which the small diameter portion is mounted; and a presser member having a second holding face which holds the small diameter portion together with the first holding face. The holding member is fixed to a housing on which the projection lens unit is mounted. The presser member does not protrude upward from the lens barrel member arranged in a dead space of the small diameter portion.

Abstract: A storage device is connected to a large-capacity low-speed memory, and divides a packet received via a network into a plurality of segments for storage. The storage device includes a small-capacity high-speed memory. A selector writes the first predetermined number of segments in the packet to the small-capacity high-speed memory, and subsequent segments to the large-capacity low-speed memory. Accordingly, regardless of from what queue a segment is read out in a segment read mode, occurrence of wasteful time in packet transfer can be prevented, and the capacity of the small-capacity high-speed memory can be reduced even when the number of queues increases.

Abstract: A lens device comprises a lens element having round depressions formed in the back thereof and a lens barrel provided with round projections formed correspondingly in position to the round depressions each of which has an axial length shorter than an axial depth of the round depression and an outer diameter smaller than an inner diameter of the depression. The lens element is held in the lens barrel with the round projections received in the round depressions, respectively.

Abstract: A lens device includes elastic bracing struts arranged at regular intervals which are deformed by a lens element supported in a lens barrel so as thereby to hold down a periphery of the lens element in directions perpendicular to an optical axis of the lens element with elastic force when the lens element causes a diametrical change due to environmental variations, so that the lens element is prevented from being brought into misalignment, and besides retaining its optical performance.

Abstract: A lens assembly includes plural lens components. A first lens element of the first lens component is aspherical and plastic, disposed on a side of a screen surface, for adjusting focus in image projection to the screen surface. A first lens barrel holds the first lens component. A second lens barrel holds a second lens component. A stationary barrel movably contains the second lens barrel. The second lens barrel is rotated helically relative to the stationary barrel, to adjust the focus for the plural lens components. Thereafter the first lens barrel is rotated helically relative to the second lens barrel, to correct image distortion for the plural lens components, and also to adjust a rotational position of the first lens element. So a gate mark on an edge portion of the first lens element is offset from an effective projecting region of the image projection.

Abstract: A housing is mounted with a screen. The housing accommodates a projector unit and a mirror. Image light emitted from the projector unit is projected to the rear of a translucent screen via the mirror. The projector unit includes a unit body, which accommodates liquid crystal display (LCD) panels and a projection lens, and a lamp housing in which a lamp unit is removably set. The lamp housing is rotatably attached to the unit body in a direction parallel to the screen and perpendicular to the unit body. The lamp housing is fixed to the unit body in a state that the lamp unit is set in a predetermined posture. The lamp unit is set in the lamp housing via a lamp opening of the housing.

Abstract: A lens device comprises a lens device having elastic bracing struts arranged at regular intervals which are deformed by a lens element supported in a lens barrel so as thereby to hold a periphery of the lens element in directions perpendicular to an optical axis of the lens element with elastic force when the lens element causes a diametrical change due to environmental variations, so that the lens element is prevented from being brought into misalignment, and besides remaining its optical performance.

Abstract: A lens device comprises a lens element having round depressions formed in the back thereof and a lens barrel provided with round projections formed correspondingly in position to the round depressions each of which has an axial length shorter than an axial depth of the round depression and an outer diameter smaller than an inner diameter of the depression. The lens element is held in the lens barrel with the round projections received in the round depressions, respectively.

Abstract: A lens assembly includes plural lens components. A first lens element of the first lens component is aspherical and plastic, disposed on a side of a screen surface, for adjusting focus in image projection to the screen surface. A first lens barrel holds the first lens component. A second lens barrel holds a second lens component. A stationary barrel movably contains the second lens barrel. The second lens barrel is rotated helically relative to the stationary barrel, to adjust the focus for the plural lens components. Thereafter the first lens barrel is rotated helically relative to the second lens barrel, to correct image distortion for the plural lens components, and also to adjust a rotational position of the first lens element. So a gate mark on an edge portion of the first lens element is offset from an effective projecting region of the image projection.

Abstract: A housing is mounted with a screen. The housing accommodates a projector unit and a mirror. Image light emitted from the projector unit is projected to the rear of a translucent screen via the mirror. The projector unit includes a unit body, which accommodates liquid crystal display (LCD) panels and a projection lens, and a lamp housing in which a lamp unit is removably set. The lamp housing is rotatably attached to the unit body in a direction parallel to the screen and perpendicular to the unit body. The lamp housing is fixed to the unit body in a state that the lamp unit is set in a predetermined posture. The lamp unit is set in the lamp housing via a lamp opening of the housing.