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: 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 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.

Abstract: This electronic device includes connector to which an external device is connected via a communication cable, controller, and output unit. Connector includes at least first and second pins. A predetermined voltage is supplied from the external device to the first pin. Controller includes a communication unit to which a signal is input from the external device via a pin other than the first and second pins of connector, and outputs, when the communication unit is in an activated state, a first signal indicating the activated state. Output unit outputs, when the first signal has not been output, a detection signal indicating that a connection has not been established with the external device to the external device via the second pin.

Abstract: The present invention realizes a light source unit and a method of cooling the light source unit that reduces any increase in the ambient temperature of a red solid-state light source and thus reduces any decrease in brightness of the red solid-state light source.

Abstract: An adjustment method for adjusting the direction of infrared light projected so that infrared light to pass over a displayed image from a projection device that is rotatable with orthogonal first and second axes as axes of rotation, the method including: arranging the projection device such that the plane containing the first axis and a line perpendicular to the upper edge or lower edge of the displayed image is orthogonal to the plane in which the displayed image is displayed; displaying a first image representing a first target on the line; and rotating the projection device with the second axis as the axis of rotation such that the irradiation position of the infrared light upon an indicator in the first image, in which is displayed a captured image, coincides with the position of the first target on the first image.

Abstract: A display device includes a video input unit that receives a video signal; a display control unit that corrects the video signal; and a display unit that has a screen on which a video according to the corrected video signal is displayed. The display device further includes a gradation correction map generation device that generates a gradation correction map which indicates a corresponding relationship between a plurality of positions on the screen and a correction value for gradation of the video signal at each of the positions; the gradation correction map generation device generates the gradation correction map according to a luminance unevenness map which indicates a corresponding relationship between the plurality of the positions and uncorrected luminance, which is luminance when correction is not performed, at each of the positions, and a second gamma characteristic which indicates a corresponding relationship between luminance at a specific position on the screen.

Abstract: A projection type display apparatus including: an illumination unit that emits a plurality of color lights having a predetermined polarization direction; a plurality of optical path adjustment units that totally reflect the plurality of color lights, respectively; a plurality of optical modulation units that modulates the plurality of color lights totally reflected by the plurality of optical path adjustment units, respectively, to emit a plurality of modulated color lights; a synthesis unit that emits the plurality of modulated color lights emitted from the optical modulation units in a same direction; and a correction unit that is arranged on an optical path between the illumination unit and the synthesis unit and that changes a polarization state of light that entered the correction unit to convert light that is incident on the synthesis unit into linearly polarized light.

Abstract: A display device includes a display panel, a driver, a detector, and an acquisition part. The driver drives the display panel based on a video signal. The detector obtains a first detection value by detecting reflective light from reflective media, which occurs when ambient light is irradiated to reflective media, while obtaining a second detection value by detecting reflective light from reflective media, which occurs when the display panel irradiates its display light to reflective media. The driver corrects a drive value for the display panel such that the second detection value approaches the first detection value or such that the chromaticity represented by the second detection value approaches the chromaticity represented by the first detection value, and therefore the acquisition part acquires information concerning the color temperature of ambient light based on the corrected drive value.

Abstract: A portable terminal includes a wireless communication unit configured to perform data communication with a wireless tag in a non-contact manner, a position determination unit configured to determine a position of the portable terminal, a control unit configured to generate guide information for guiding the portable terminal to a communicable area where communication with the wireless tag is enabled on the basis of the position determined by the position determination unit if communication is disabled when communication with the wireless tag is performed, and a display unit configured to display the generated guide information.

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: A projector includes: a light source that emits light of a first color and a second color; a first image formation element that forms a first image light of the first color; a second image formation element that forms a second image light of the second color; a projection lens that projects the first image light and the second image light to the outside; a first optical system that guides light of the first color that is emitted from the light source to the first image formation element, and guides light of the first color from the first image formation element to the projection lens; and a second optical system that guides light of the second color that is emitted from the light source to the second image formation element, and guides light of the second color from the second image formation element to the projection lens.

Abstract: A light source device includes: an excitation light source unit that emits excitation light; a phosphor wheel unit that includes a wheel that produces fluorescence by the excitation light and that, by causing the wheel to rotate, changes the position on the wheel that is irradiated by the excitation light; a detection unit that detects rotation of the wheel; and a control unit that changes intensity of the excitation light on the basis of the detection result of the detection unit and the fluorescence characteristic of the wheel.

Abstract: A projection type display apparatus including: an illumination unit that emits a plurality of color lights having a predetermined polarization direction; a plurality of optical path adjustment units that totally reflect the plurality of color lights, respectively; a plurality of optical modulation units that modulates the plurality of color lights totally reflected by the plurality of optical path adjustment units, respectively, to emit a plurality of modulated color lights; a synthesis unit that emits the plurality of modulated color lights emitted from the optical modulation units in a same direction; and a correction unit that is arranged on an optical path between the illumination unit and the synthesis unit and that changes a polarization state of light that entered the correction unit to convert light that is incident on the synthesis unit into linearly polarized light.

Abstract: A projector includes: first and second display panels and a projection unit that superposes images formed by the first and second display panels and that projects the superposed images on a projection surface. The first and second display panels are arranged such that the image formed by one display panel is projected to a position shifted by a predetermined distance in at least one of the row direction and column direction of the picture element array with respect to the position where the image formed by the other display panel is projected.

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 display system includes a plurality of display apparatuses. Each of the plurality of display apparatuses includes a display panel that displays an image and a sending and receiving unit that at least receives setting information of one of the plurality of display apparatuses. A first display apparatus that is one of the plurality of display apparatuses further includes a coordinate acquiring unit that acquires a coordinate. A first sending and receiving unit of the first display apparatus receives setting information of a second display apparatus specified by the coordinate from the second display apparatus. A first display panel of the first display apparatus displays a setting image that indicates the setting information.

Abstract: An illuminating device includes: a light source emitting excitation light; a wheel including a wheel substrate transmitting the excitation light and an illuminating light generating member provided on the first surface of the wheel substrate to generate illuminating light by the excitation light; a photo detector, arranged on the second surface side that is opposite to the first surface of the wheel substrate, detects light that passed through the wheel; and a control unit that determines whether a defect or degeneration has occurred in the illuminating light generating member, based on the light detected by the photo detector.