Abstract: Provided is a display device that has a usage validity period and confirms that the device is within the usage validity period when it is used, and can be improved in usefulness and can be used quickly, as well as a usage management method and program for the display device. The display device includes: a real-time clock; and, a control unit that, upon receiving a video display-ON signal for turning on video display under the condition that the status of the real-time clock is invalid, displays video corresponding to an input video signal.

Abstract: Display control device 100 in the present invention includes: memory 101 that stores an image signal input from a signal source; controller 102 that determines the number of output frames based on an input vertical synchronizing signal input from the signal source, the output frames being frames to be displayed on a display in one cycle of the input vertical synchronizing signal, and that determines a dot number in an output horizontal period such that a gap between an output frame line number of a predetermined output frame and the output frame line number of a different output frame in a period corresponding to one cycle of the input vertical synchronizing signal is smaller than a predetermined threshold, the output horizontal period being one cycle of an output horizontal synchronizing signal, the output frame line number being the number of output horizontal periods corresponding to the output frame; and output section 103 that reads the image signal from storage 101 depending on the dot number determined

Abstract: An image display device having a display panel, the device being utilized to form an image display system in which a plurality of the image display devices are arrayed in one or both of vertical and horizontal directions to display one image as a whole while an image allocated to each device is displayed via the corresponding display panel, the image display device includes a reading processing unit that reads out image information and delays start of output of this image information by a predetermined period of time determined based on the number of the image display devices which forms the image display system and a row to which the present device belongs in the vertical arrangement.

Abstract: A light source includes an invisible light emitter that emits an invisible light beam and a visible light emitter that emits a visible light beam. A light source controller causes the light source to emit at least one light beam from among the invisible light beam and the visible light beam. A propagation controller causes an emission light beam emitted from the light source to propagate along a predetermined plane.

Abstract: An image correction device includes: a first target unevenness characteristic calculation unit that calculates a first target unevenness characteristic based on a first uncorrected unevenness characteristic and a correction amount, the first uncorrected unevenness characteristic being an uncorrected unevenness characteristic at a first gradation, the uncorrected unevenness characteristic being a characteristic of brightness unevenness of a display panel when uncorrected, the correction amount being calculated based on a backlight drive value and a black level; a second target unevenness characteristic calculation unit that calculates a second target unevenness characteristic based on a second uncorrected unevenness characteristic and the backlight drive value, the second uncorrected unevenness characteristic being the uncorrected unevenness characteristic at a second gradation; and a correction data generation unit that generates correction data for each gradation for correcting an image signal, based on the

Abstract: A display device, comprising: a display panel; a driver configured to drive the display panel based on a video signal; and a detector configured to obtain a first detection value by detecting reflective light from a reflective media, which occurs when ambient light is irradiated to the reflective media, while obtaining a second detection value by detecting reflective light from the reflective media, which occurs when the display panel irradiates display light to the reflective media.

Abstract: A phosphor wheel is obtained by providing a phosphor on a rotatable substrate. The phosphor is formed of a plurality of small pieces, and the small pieces are arranged such that the phosphor has a ring shape, or a shape obtained by cutting away a portion from a ring shape about an axis of rotation of the substrate.

Abstract: An image display device includes: a light source unit that sequentially supplies light of a plurality of colors; an image formation unit that is provided with a pixel region that is made up of a plurality of pixels, light of a plurality of colors supplied by the light source unit sequentially irradiating the pixel region, and images of a plurality of colors being sequentially formed by the modulation of the incident light by each of the pixels; and a controller that controls the image-forming operation of the image formation unit. The controller causes formation of images of at least one color among the plurality of colors with pixel combinations made up of a plurality of pixels as pixel units and individually controls each pixel that make up the pixel combinations.

Abstract: A projection-type display system has: a light-emitting wheel that, by rotating, sequentially supplies light excited by light emitted from a light source and transmitted or reflected light of light that is emitted by the light source; a color separation wheel that, by rotating, sequentially color-separates and supplies light output of the light-emitting wheel; an image-forming element that, in accordance with a picture signal, performs light modulation of the light supplied by the color separation wheel; a light detection unit that detects the light that has undergone light modulation; and control units that adjust the light modulation and rotation timing of the light-emitting wheel after adjusting the light modulation and rotation timing of the color separation wheel.

Abstract: A field sequential type projector comprises: a plurality of light sources that output primary color lights each having a peak wavelength in a primary color wavelength region, the primary color lights having different peak wavelengths in the primary color wavelength region; an illumination optical system that includes a video image formation device that spatially modulates the primary color lights output from the plurality of light sources to form an image light, and guides the primary color lights output from the plurality of light sources to the video image formation device; and a projection optical system that projects the image light formed by the video image formation device.

Abstract: A display device includes a network unit including a first port that is connectable to a control computer or a display device on a prior stage in a daisy chain manner and a second port that is connectable to a display device on a subsequent stage in the daisy chain manner, and a storage unit that stores addresses of display devices, as transmission sources, transmitted from one or each of the display devices at subsequent stages of a daisy chain connected via the second port in response to a request to search for a plurality of display devices as targets for determining display device IDs thereof the plurality of display devices being connected to the control computer in the daisy chain manner, the request being transmitted from the control computer to the plurality of display devices, where the addresses are received by the network unit.

Abstract: A display device includes: a first detection unit that detects an external signal from a second external device via a second connection unit, and outputs a first detection result indicating presence of an external signal; and a control unit that determines whether the second external device is connected with a second input unit based on the first detection result, and performs control so that a video signal to be supplied to a display unit is switched from a first video signal to a second video signal to cause the display unit to display an image based on the second video signal in a case where the control unit that determines that the second external device is connected with the second input unit.

Abstract: A projection display apparatus that can prevent deviation in the light quantity distribution of the projected image is provided. A projection display apparatus includes: a light source unit including a light emitting element; an image light generator modulating light from the light source unit to emit image light; a projecting unit projecting the image light; a polarization modulator on which the image light is made incident and that emits light in a particular polarization state; and a depolarizer arranged on the optical path between the light emitting element and the polarization modulator.

Abstract: An image display apparatus (and a method for dimming a light source) includes a light source and display units that spatially modulate a light from the light source on the basis of an input video signal to form an image, and performs dimming control to adjust luminance of the light source in stages. The image display apparatus includes a light source dimming unit that determines whether to perform dimming control on the basis of the input video signal, acquires a dimming rate, which is a ratio of brightness of an input image to a maximum luminance output from the light source, and sets the output of the light source to the maximum luminance output when a dimming rate of a frame immediately before a frame determined not to be subjected to dimming control is lower than a threshold.

Abstract: A phosphor holder includes: a rectangular flat plate-like pedestal; a plurality of phosphor holder attachment surfaces provided at a plurality of points, respectively, on an outer peripheral section of the pedestal and protruding in a first direction by a predetermined height with respect to surroundings; a base mounted substantially in a center of a surface of the pedestal facing in the first direction; a motor mounted on the base and having a rotating shaft substantially orthogonal to an in-plane direction of the pedestal; a phosphor wheel on which a phosphor is formed and that is rotated by the motor; and a plurality of adjustment shims mounted on the plurality of phosphor wheel attachment surfaces and brought into contact with the holder attachment surface.

Abstract: A lighting device includes: a first light source that supplies yellow fluorescent light; a second light source that supplies blue light; a light sensor that detects the light quantity of a blue component of combined light, in which the yellow fluorescent light and blue light have been combined, and the light quantity of a first color component that is contained in the yellow fluorescent light and that differs from the blue component; and a control unit that adjusts the luminance of the first and second light sources. The control unit acquires each of a first light quantity that is the light quantity of the first color component and a second light quantity that is the light quantity of the blue component in a first state in which the first light source is ON and the second light source is OFF, and acquires a third light quantity.

Abstract: An image display device and a light source dimming method are provided for enabling display of an image with natural brightness through dimming control. The image display device includes: a light source; a display unit that spatially modulates light from the light source on the basis of an input video e signal to form an image; a histogram acquisition unit that, on the basis of the input video signal, acquires a first histogram, in which image data is indicated by the frequencies of levels of brightness, and a second histogram having a number of levels of brightness that differs from the number of levels of brightness of the first histogram; and a control unit that performs dimming control that adjusts the luminance of the light source on the basis of the first and second histograms.

Abstract: A video signal monitoring device includes a sensor installed in a display device and configured to detect luminance and/or chromaticity in a predetermined region among regions of a video displayed on the display device, a sensing result converting unit configured to convert the detected luminance and/or chromaticity into video identification information for identifying the video, a time measuring unit configured to acquire a clock time or a period of time at or during which the video was displayed, and a sensing result reading unit configured to output the video identification information and the clock time or the period of time.

Abstract: A cooling device air-cools a heat-generating portion within an electronic apparatus, the cooling device including a fan that generates a cooling airflow and vibration-generating unit that generates flow-induced vibration in the cooling airflow that is conveyed to the heat-generating portion. The electronic apparatus includes the cooling device and the heat-generating portion that is the object of cooling by the cooling device. A projection-type display device displays an image by projecting the image, the projection-type display device including the cooling device and a liquid crystal unit that forms the images to be projected and that is the heat-generating portion that is the object of cooling by the cooling device.

Abstract: The present invention provides a projector with high brightness, the projector including: a first light source that outputs a first light containing a first fluorescence generated in a first fluorescence region; a second light source that outputs a second light containing a second fluorescence generated in a second fluorescence region; first to third image display elements; a light separation optical system that generates an illumination light illuminating the first to third image display elements with colors different from each other from the input first light and second light and radiates the illumination light to the first to third image display elements; and a controller that causes the first to third image display elements to display an image according to an input video signal and colors of the illumination light radiated to the first to third image display elements.