Abstract: A projection display device that modulates light on the basis of image information to form an optical image, and that projects the formed optical image, includes: light source devices 10R, 10G and 10B; optical modulation device 50 that modulates lights emitted from light source devices 10R, 10G and 10B; and common metal plate 70 on which light source devices 10R, 10G and 10B and optical modulation device 50 are mounted, light source devices 10R, 10G and 10B and optical modulation device 50 being thermally connected via metal plate 70.

Abstract: A collimator lens unit includes at least two lenses and substantially collimates a beam of light emitted from a solid-state light source unit of a Lambert emission type, wherein at least two faces of incidence faces and emission faces of the lenses constituting the two lenses are aspheric faces, one front aspheric face located close to the solid-state light source unit has a function of changing a luminous flux density distribution of the beam of light emitted from the solid-state light source unit to a predetermined luminous flux density distribution in which the luminous flux density in the vicinity of an optical axis of the collimator lens unit is higher than the luminous flux density in a peripheral portion separated from the optical, the rear aspheric face farthest from the solid-state light source unit has a function of substantially collimating the beam of light.

Abstract: There is provided a light source unit comprising a luminescent plate having a luminescent light emission portion and a diffuse transmission portion, a first light source which emits light of a wavelength band which can excite the luminescent material, a second light source which emits light of a wavelength band which differs from the luminous light and the light emitted from the first light source, a light guiding optical system which guides light of respective wavelength bands in color emitted from the luminescent plate to a predetermined plane, and a light source control part for controlling individually the emission of light from the first light source and the second light source, wherein the luminescent plate is disposed on optical paths of the first light source and the second light source, wherein a light shining position of light from the first light source and a light shining position of light from the second light source are made to differ from each other on the luminescent plate, and wherein the lig

Abstract: A projection-type image display apparatus that enlarges and displays an image includes: a case, a laser light source, a cooling mechanism that includes a component that produces vibration during operation, a diffuser that diffuses light that is emitted from the laser light source, optics that shape light diffused by the diffuser to light having a uniform luminance distribution and rectangular cross-section, and an optical modulation element that modulates light shaped by the optics; wherein the component included in the cooling mechanism and the diffuser are connected by way of a vibration transmitting member.

Abstract: A light source device, includes: an arc tube having a tube spherical portion containing a pair of electrodes disposed along an illumination axis, and a pair of sealing portions extending from both sides of the tube spherical portion; a reflector having a reflection portion disposed in the vicinity of one of the sealing portions of the arc tube for reflecting light emitted from the arc tube toward an illumination area; and a flow regulating unit including a plurality of projecting portions projecting in a direction approximately along the illumination axis to regulate the flow direction of cooling air, and a fixing portion for fixing the plural projecting portions to one of the sealing portions in the vicinity of the tube spherical portion.

Abstract: A display device includes: a wall defining a viewer-side space; an observed object arranged in an object-side space partitioned off the viewer-side space by a portion of the wall; an imaging optical system of real specular image including a semitransparent substrate with a plane of symmetry for defining the viewer-side space and the object-side space as the portion of the wall to image a real image of the observed object in the viewer-side space with light passing through the substrate; a screen surface having a function of diffuse reflection and provided with the substrate so as to face the viewer-side space; and a projector optical system projecting an image on the screen surface in the viewer-side space.

Abstract: A projection apparatus and a method for adjusting a driving voltage of the projection apparatus are provided. The projection apparatus comprises an illuminant module, an output voltage control module, an illuminant driver module, and an illuminant driver management module. The output voltage control module is configured to output a driving voltage. The illuminant driver module is configured to output an illuminant voltage to the illuminant module after receiving the driving voltage. The illuminant driver management module is configured to receive the illuminant voltage and to detect a variation in the illuminant voltage. Then, the illuminant driver management module outputs a control signal to the output voltage control module according to the variation of the illuminant voltage. Finally, the output voltage control module adjusts the driving voltage according to the control signal.

Abstract: The present invention provides a hologram which forms a light intensity distribution on a predetermined plane by using an incident light. The hologram includes a plurality of cells configured to control both a phase of a first polarized light component of the incident light and a phase of a second polarized light component. The plurality of cells are designed to form a portion in an overlap region in which a first light intensity distribution region formed on the predetermined plane by the first polarized light component and a second light intensity distribution region formed on the predetermined plane by the second polarized light component are superposed on each other. The phase of the first polarized light component is diffused in the portion formed in the overlap region.

Abstract: A projection optical system for projecting an image of an image display element, includes a lens, a stop, and a holder configured to hold the lens and the stop and disposed at an image-display-element side of the stop. In addition, a light blocking member is disposed at the image-display-element side of the stop and fixed within the holder. At least a part of the light blocking member extends to a position nearer to an optical axis of the lens than the holder, and a face of the light-blocking member nearer to the image-display-element side is inclined in a section including an optical axis of the lens so that a point nearer to the optical axis comes closer to the image display element.

Abstract: A projection image display apparatus including a detachably attachable light source unit includes: a storage means provided to the light source unit and having previously stored therein information that the light source unit is a genuine product; a determination means making a comparison with the information in the storage means to determine whether the light source unit is the genuine product; and a light source control means controlling an output of the light source unit in accordance with a result from the determination means.

Abstract: A projector includes: an image projection unit which projects an image corresponding to image information; an image pickup unit which shoots the image projected from the image projection unit; an image switching unit which switches state of the image based on a predetermined phenomenon; and a projection condition control unit which allows the image projection unit to project a predetermined test image at the time when the image switching unit switches state of the image, and allows the image pickup unit to shoot the projected test image to control projection condition of the image based on the picked-up image result.

Abstract: A medical image processing apparatus of the present invention includes: a three-dimensional model estimating section for estimating a three-dimensional model of an object based on a two-dimensional image of an image of the object which is inputted from a medical image pickup apparatus; an image dividing section for dividing the two-dimensional image into a plurality of regions each of which includes at least one or more pixels; a feature value calculation section for calculating a feature value according to a grayscale of each pixel in one region for each of the plurality of regions; and a lesion detection reference setting section for setting lesion detection reference for detecting a locally protruding lesion in the regions of the three-dimensional model which correspond to each of the plurality of regions, based on the feature value according to the grayscale.

Abstract: An illumination apparatus including a first light emitting device, a first phosphor layer, a second light emitting device and a second phosphor layer and a beam combining element is provided. The first light emitting device is capable of providing a first light beam and the first phosphor layer is disposed on the transmission path of the first light beam. The second light emitting device is disposed opposite to the first light emitting device and for providing a second light beam, wherein the second phosphor layer is disposed on the transmission path of the second light beam. The beam combining element is disposed between the first phosphor layer and the second phosphor layer. In addition, the invention also provides a projection apparatus.

Abstract: An airflow-guiding device for a light source includes a cap and a guiding element. The cap has an airflow inlet, a through opening, an airflow outlet, a foundation, an annular side wall, and a cover. The foundation is connected to a reflector of the light source. The through opening is located at the foundation and corresponding to a light outlet of the reflector. The annular side wall where the airflow inlet is located is disposed on the foundation. The cover where the airflow outlet is located is disposed on the annular side wall and opposite to the foundation. The guiding element includes a guiding opening and an annular body. The annular body is rotatably disposed in the cap. The annular body where the guiding opening is located surrounds at least part of the through opening and forms a guiding tunnel together with the annular side wall in the cap.

Abstract: A projector includes: an external housing which forms an external case, wherein a bottom surface of the external housing as a surface opposed to an installation surface on which the projector is installed has feet contacting the installation surface, the feet has a first foot freely projected toward the installation surface and withdrawn from the installation surface, and a second foot disposed away from the first foot and projected toward the installation surface, and the second foot is inclined in a direction away from the first foot in such a manner that the inclination of the second foot increases in the direction toward the installation surface.

Abstract: A projector includes an optical module, a lens and a heat conducting member. The heat conducting member is disposed between the optical module and the lens. The heat conducting member is used for conducting heat from the lens to the optical module.

Abstract: A discharge lamp lighting device includes a lamp current control portion that generates, in synchronization with an input video signal, a control signal for controlling polarity reversal of an AC current with a steady-state lighting frequency and an AC current with a low frequency, and a lamp driving portion that drives the discharge lamp based on the control signal that is output by the lamp current control portion. The lamp current control portion generates a control signal for a brightness reduction waveform with timing corresponding to polarity reversal of the AC current with the steady-state lighting frequency, and the lamp driving portion inserts a current reduction waveform into the AC current with the low frequency by decreasing a voltage applied to the discharge lamp based on the control signal for the brightness reduction waveform.

Abstract: A projector includes: an illuminator that emits an illumination light flux; a light control mechanism that blocks at least part of the illumination light from the illuminator; a light modulator illuminated with the illumination light from the illuminator; a projection system capable of projecting modulated light formed by the light modulator and switching the f number when the modulated light is projected; and a control unit that controls the open/close state of the light control mechanism in accordance with the f number of the projection system so that illumination light having an angular distribution corresponding to the f number of the projection system is incident on the projection system.

Abstract: An illuminator that illuminates a projected surface includes a laser light source that emits laser light; a polarization converter disposed downstream of the laser light source, the polarization converter having a first area that converts the polarization direction of incident laser light into a first polarization direction and outputs the resultant laser light and a second area that converts the polarization direction of incident laser light into a second polarization direction and outputs the resultant laser light; and a light diffusion section disposed downstream of the laser light source, the light diffusion section diffusing incident laser light.

Abstract: An illumination apparatus includes: a polarization conversion element configured to align polarization directions of light emitted from a light source in one polarization direction; a color separation unit configured to separate the light whose polarization directions are aligned in the one polarization direction by the polarization conversion element; and a polarization adjustment element configured to adjust a polarization state of light in a predetermined wavelength band within a wavelength range of the light emitted from the light source. The polarization adjustment element is provided between the polarization conversion element and the color separation unit on an optical path of the light emitted from the light source.