Abstract: An intake structure, installed in a projection apparatus having heating elements, includes an intake port on the casing, air duct and an exhaust fan near the heating elements. The inlet of the air duct is connected to the intake port, and the outlet is disposed at a side of the heating elements. The air stream from the intake port is directed though the air duct for concentrating the air stream to the heating elements inside of the projection apparatus. Thus, it can be provided the maximum cooling effect and enhanced cooling efficiency for heating elements.

Abstract: An image projection apparatus includes a lamp, an optical modulator which modulates light emitted from the lamp to correspond to image data, a ballast which operates the lamp, a power supply unit, and a duct in which the power supply unit, the ballast, and the lamp are accommodated. The duct includes a first absorption hole and a main exhaust hole that communicate with an outside, and forms an air-flow path on which the first absorption hole, the power supply unit, the ballast, the lamp, and the main exhaust hole are disposed.

Abstract: A light source device (411) has a lamp body (411A) including a light source lamp, a reflector (417) and an anti-explosion glass (418), and a lamp housing (411B) for accommodating the lamp body (411A). A plurality of projections (411B8) protruding along an optical axis of a light beam irradiated by the light source lamp are formed on the lamp housing (411B). Further, the reflector (417) has an approximately concave cross section and a positioning surface (417C) that touches the projections (411B8) of the lamp housing (411B) to locate the lamp body (411A) relative to the lamp housing (411B) is provided on a distal side of the concave section. The positioning surface (417C) is continuously flush.

Abstract: With a trend toward a higher intensity projection type liquid crystal display device to further increase brightness of a projection screen, rated input power of a light source lamp increases, which makes essential a fan apparatus for cooling the light source lamp, etc. Such a fan apparatus would require a light-shielding member which causes the number of parts to increase. The present invention provides a fan apparatus provided with a rotor section that can be rotated/driven around a predetermined rotation axis and a propeller section including propeller blades and attached to the rotor section arranged in such a way as to substantially shield light parallel to the rotation axis.

Abstract: A method for presenting secondary information to a video-viewing audience comprises projecting video images onto a screen and projecting invisible light signals encoded to represent secondary information associated with said video images onto the screen concurrently with said video images.

Abstract: A housing (500) for a wire grid polarizing beamsplitter (240) and a spatial light modulator (210) in alignment with an output optical path has a front plate having an opening (502) for admitting incident illumination and a modulator mounting plate (506) for mounting the spatial light modulator (210) in the optical output path. First and second polarizer support plates (512, 520) extend between the front plate and the modulator mounting plate (506), with their respective facing inner surfaces providing coplanar support features for supporting the wire grid polarizing beamsplitter (240) within a fixed plane. The coplanar support features allow rotation of the wire grid polarizing beamsplitter (240) with respect to the output axis. The wire grid polarizing beamsplitter (240) has its surface at a fixed angle with respect to the surface of the spatial light modulator (210), the angle defining an output optical axis along the output optical path.

Abstract: A system and method of alerting a wireless communication capability of a camera body to the presence of an external antenna element present in electrical communication with a pre-existing port of the camera body that was originally not designed for an external antenna. The wireless communication capability may be activated and/or deactivated by an electrical event produced when a connector of the external antenna is connected to the pre-existing port.

Abstract: A projection display apparatus that is lightweight and provides bright, high quality images is provided. The projection display apparatus comprising a color separation and synthesis optical system 4, that performs color synthesis, generating an image, after separating light of the three primary colors of determined polarities into the respective three colors, and modulating those three color lights in relation to respective image signals therefor, and a projection lens 106. The color separation and synthesis optical system 4 comprises polarized light separating means 8, 9, 11 and 16 disposed in respective diagonal directions therein and reflecting spatial light modulating elements 12, 13 and 14 disposed to perform light modulation coordinated to an image signal for each respective color, for light separated according to polarization by the four polarized light separating means 8, 9, 11.

Abstract: A projection apparatus is formed employing a solid state light source having either an associated or integrated sensor to monitor a thermal condition of a region of the solid state light source. The sensor is equipped to output a signal indicative of the thermal condition of the monitored region. In various embodiments, a controller is also provided to conditionally initiate one or more thermal management actions based at least in part on the thermal condition of the region as indicated by the signal.

Abstract: A light source device includes a light-emitting tube and a reflector. The light-emitting tube has a light-emitting portion that generates a light beam by an electric discharge between electrodes, and sealing portions provided on both sides of the light-emitting portion. The light-emitting tube has a sub-reflection mirror that covers substantially a front half of the light-emitting portion. The reflector has a neck portion provided with an insertion hole to which the light-emitting tube is inserted, and a reflecting portion integrally formed with the neck portion and having an ellipsoidal curved reflecting surface that irradiates the light beam emitted by the light-emitting portion to align the light beam in a predetermined direction. The opening diameter of the insertion hole on the side of the reflecting surface is greater than the external diameter of the sub-reflection mirror and within the internal diameter of a valid reflection area of the reflector.

Abstract: An image display apparatus includes an indicating element which modulates or emits light as a pixel in accordance with image information. A displacement unit optically displaces a position of the pixel for each of two or more sub-fields constituting an image field corresponding to the image information. A projection unit enlarges the pixel and projects an enlarged pixel on a screen. A pixel-profile deformation unit changes an optical intensity profile of the pixel.

Abstract: The invention provides a fine dichroic color-filter array. In particular, dichroic filter layers for B, R, and G, respectively, are patterned facing the corresponding blue pixel-electrodes, red pixel-electrodes, and green pixel-electrodes. The filter layers can be stacked on top of one another while being separated by transmissive interlayers.

Abstract: The invention provides a holder frame, optical device and projector which can prevent the substrate from deviating in position, the substrate from being compressed at the outer periphery and color unevenness from occurring. More particularly, in the four sides of a luminous-flux incident surface of a holder frame, there can be formed a plurality of cutouts extending from a vicinity of an opening to an outer edge of the luminous-flux incident surface and nearly orthogonal to a lengthwise of each side. Also, in the four sides of an accommodating surface of the holder frame, there are formed a plurality of cutouts extending from a vicinity of an opening to an outer edge of the accommodating surface and nearly orthogonal to a lengthwise of each side. The cutouts in each side of the accommodating surface of the holder frame are formed in positions between the cutouts formed in each side of the luminous-flux incident surface of the holder frame as viewed from a side of luminance-flux incidence.

Abstract: An illuminating optical system for focusing a radiant light of a light source (1) onto a reflecting light valve (6) and a projection lens (7) for magnifying and projecting a reflected light from the reflecting light valve (6) onto a screen are provided, a diaphragm (31) is disposed at a substantially conjugate position of an entrance pupil of the projection lens (7) on an optical path of the illuminating optical system, the diaphragm (31) has an opening whose area is changed by a light-shielding member, and a shape of a shielded portion of the diaphragm (31) shielded by the light-shielding member is rotationally asymmetric to an optical axis (12) of the illuminating optical system. Accordingly, shielding of necessary light can be better avoided compared with a diaphragm for changing the light-shielding area in a rotationally symmetric manner, for example, a diaphragm for narrowing the opening concentrically, making it possible to improve contrast performance while minimizing brightness reduction.

Abstract: The present invention provides a technique for readily changing the design of a projector. A projector comprises: an illumination optical system; a light modulation device; a projection optical system; and a base frame for mounting a plurality of optical components disposed on a light path from the optical illumination system to the projection optical system. The illumination optical system 300 comprises: a light source 20; a lens array 320; and a superimposing lens system 370. The base frame includes a positioning section for positioning the superimposing lens system 370. The superimposing lens system 370 includes at least two lenses 371 and 372. The first lens 371 is provided at a position nearest to the light source and mainly determines an F-number of the illumination optical system. The second lens 372 is provided at a position furthest from the light source and mainly determines a magnification of the illumination optical system.

Abstract: The invention provides a fixing plate, optical device and projector capable of preventing against color unevenness occurrence and pixel deviation. Specifically, in each of the four sides of a luminous-flux exit surface of a plate part of a fixing plate, there can alternately be formed a first cutout in a groove form extending from an opening toward an outer edge of the plate part and nearly orthogonal to a lengthwise of each side, and a second cutout in a groove form extending from the outer edge toward the opening and nearly orthogonal to the lengthwise of each side.

Abstract: A method for displaying a series of images on a projection screen as a function of a position of a presenter in front of the projection screen. First, the width of the screen is divided into a number of segments of selected widths. The positions of each of the segments is stored in a memory. The position of the presenter is compared with the stored segments to identify the segment currently occupied by the presenter.

Abstract: To provide a projection type video display capable of reliably preventing a double image from being produced. A first light flux producer for producing a first light flux and a second light flux producer for producing a second light flux are arranged on the light emission side of a lamp. The light flux producer comprises a condenser lens, a rod integrator, and a pair of lenses. Lights passing through the pair of lenses are respectively refracted by condenser lenses, and are respectively introduced into first and second areas of a liquid crystal display panel in such a manner as to cross an optical surface in a color separating and mixing sector.

Abstract: A digital projector is provided that includes a projector housing, and a manually openable panel that provides access to the interior of the projector housing. The panel is configured so that it remains associated with the projector housing while open.

Abstract: A projector includes a spherical housing for housing circuitry configured to generate an image. A lens is included in the housing to project the image. A concave base supports the spherical housing. The lens is aimed in a desired direction by positioning the spherical housing with respect to the concave base.