Abstract: A display apparatus constitutes a display system that displays an image using the display apparatus and at least one other display apparatus. The display apparatus includes: a display unit that displays an image; a detection unit that detects a position selected on the display unit by a user to obtain positional information; a communication unit that communicates with a control apparatus and with the at least one apparatus; and a control unit that performs control to communicate with the control apparatus and to communicate with the at least one display apparatus, via the communication unit. The control unit outputs the positional information and identification information of the display apparatus in the display system, via the communication unit when the user selects a position on the display unit.

Abstract: A display device includes: a display unit that displays an image; and a handle provided on a back surface of the display unit. The handle includes: a handle body that is manually grasped; and a fixing part that is detachably fixed to a back surface of the display unit. The fixing part includes: a first fixing mechanism that fixes the handle in a state in which the handle body protrudes outward in a depth direction from the back surface of the display unit, and a gap between the handle body and the display unit in the depth direction is enlarged; and a second fixing mechanism that fixes the handle in a state in which the gap between the handle body and the display unit in the depth direction is reduced relative to a state of the handle being fixed using the first fixing mechanism.

Abstract: The projector comprises: at least one light source; a light separation unit separating light emitted from the light source into a first and second lights in different wavelength bands; a TIR prism through which the first and second lights pass; an optical modulating element irradiated with and modulating the first and second lights to emit the modulated first and second lights toward the TIR prism; a projection lens expanding and projecting the light which is modulated by the optical modulating element and passes the TIR prism; a rotating prism which is rotatably arranged in the light path between the light separation unit and the TIR prism and emits, from different positions in accordance with rotation, the first and second lights emitted from the light separation unit; and a control unit which, when the image signals representing a first and second images are supplied, causes the optical modulating element to perform modulation according to the image signal of the first image with regard to the area irradia

Abstract: A display apparatus includes a detector configured to detect an infrared ray emitted from a human body; a state signal generator configured to generate a state signal including at least one of a first state signal component indicating that the human body is approaching the detector and a second state signal component indicating that the human body is leaving from the detector in response to an intensity variance of the infrared ray detected with the detector; and a controller configured to start controlling an external device upon detecting the first state signal component from the state signal generated by the state signal generator but to stop controlling the external device upon detecting the second state signal component from the state signal.

Abstract: An identifier control device includes: a cumulative transmission and reception initiation control unit that instructs a plurality of controlled devices, via a network, to initiate cumulative transmission and reception; a distance determination command transmission unit that transmits to each of the plurality of controlled devices via the network a distance determination command; a distance recognition unit that determines the distances on the network with respect to the respective plurality of controlled devices, based on response signals transmitted by the respective plurality of controlled devices after the accumulation time has elapsed from when each of the plurality of controlled devices receives the distance determination command; and an identifier control unit that sets to each of the plurality of controlled devices, via the network, an identifier for each of the plurality of controlled devices determined based on the determined distances on the network.

Abstract: Provided is a light source cooling device that includes: a case in which exhaust port (112) is formed; ventilation device (102) that has a blowing port blowing air and that is located in the case; flow path component (301); light source (101); and holding part (121) disposed in an inner surface of case (108). Flow path component (301) constitutes flow path (403) for guiding air from ventilation device (102) to exhaust port (112) in the case. Light source (101) is located in flow path (403). Flow path component (301) includes a first opening and a second opening. The first opening is connected to exhaust port (112), while the second opening is connected to the blowing port of ventilation device (102). An outer surface of flow path component (301) is held by holding part (121).

Abstract: An illumination optical system includes: a light source that generates excitation light; a fluorescent body that generates fluorescent light by irradiation with the excitation light and that is disposed in a region wider than the irradiation spot of the excitation light; a plate in which the fluorescent body is disposed; and a driving mechanism that moves the plate so that the irradiation spot of the excitation light can intermittently move over the fluorescent body.

Abstract: A liquid-crystal projector includes: liquid-crystal panel sections a first illumination section including a red light source, red light emitted from the red light source being applied to a liquid-crystal panel section; a second illumination section including a green light source, a blue light source and a polarizing beam splitter that splits green light emitted from the green light source into p-polarized light and s-polarized light, the green s-polarized light being applied to a liquid-crystal panel section, the green p-polarized light and blue light being applied to a liquid-crystal panel section on the same optical path; a cross dichroic mirror that combines images displayed on liquid-crystal panel sections; a projection lens that projects the combined image; and a control unit that controls on/off states of the red light source, the green light source and the blue light source based on an input video signal to display respective images on the liquid-crystal panel sections.

Abstract: In a display device, a signal level detection circuit detects RGB signal levels for each pixel from an image signal, and then a control circuit detects an area using a gray scale of a single color based on RGB signal levels for each pixel. A first color conversion circuit carries out an image correction on an image signal while a second color conversion circuit carries out another image correction-on an image signal. An H/V position control circuit extracts an image signal of an area detected by the control circuit from an image signal subjected to the image correction of the second color conversion circuit. An image superposition circuit superposes the image signal extracted by the H/V position control circuit with the image signal subjected to the image correction of the first color conversion circuit, thus displaying the superposed image signal on a display.

Abstract: A display device includes: a display screen displaying screen images; a required-brightness computation unit computing required brightnesses for each of the screen images; a brightness determination unit comparing the required brightnesses computed for each of the screen images, and determining the screen image corresponding to the required brightness having highest brightness to be a maximum-required-brightness image; and a brightness control unit performing light-source brightness control and performing image gradation control, the light-source brightness control controlling the brightness of the light source so as to make the brightness of the light source the set brightness for the maximum-required-brightness image, the image gradation control controlling a gradation of the image displayed on the liquid-crystal panel in accordance with the brightness of the light source, so as to make a brightness of each of the screen images other than the maximum-required-brightness image the set brightness specified fo

Abstract: The present invention includes: LCDs (47, 48, 49) corresponding to red, green, and blue, respectively; an air duct for red, an air duct for green, and an air duct for blue provided to blow cooling air to the LCDs (47, 48, 49), respectively; air filters (43, 50) provided in each of the air duct for red, the air duct for green, and the air duct for blue; and air filters (41, 42) provided in at least one air duct of the air duct for green and the air duct for blue and having filter mesh size smaller than that of the air filters (43, 50).

Abstract: Disclosed is an illumination optical system that includes: two solid-state light sources (11 and 12); first light guide (21) configured to guide light emitted from one solid-state light source in a first direction; second light guide (22) configured to guide light emitted from the other solid-state light source in a second direction different from the first direction; and optical path conversion units (31 and 32) including total reflection surfaces for totally reflecting the lights guided by the first light guide and the second light guide to enter the lights into third light guide (50). A projection display apparatus that uses the illumination optical system thus configured can enter light emitted from a plurality of light sources straight into an image forming element by one optical system.

Abstract: An image determination section determines whether an input image signal represents a bright image or a dark image. A control section switches between a first lighting mode in which the output of a power supply section is a first power value and a second lighting mode in which the output of power supply section is a second power value based on the determined result of the image determination section. The control section refers to a first table that contains data representing the relationship between the power value of the power supply section and the number of rotations of a cooling fan in the case in which the output of the power supply section is increased from the second power value to the first power value at a constant rate when the second lighting mode is switched to the first lighting mode.

Abstract: In an electronic device including a discharge lamp, and a lamp power supply section that supplies power to the discharge lamp, a control section makes the lamp power supply section execute a lamp refresh process of supplying power necessary for generation of a halogen cycle to the discharge lamp at predetermined time intervals during low power operation in which the discharge lamp is lighted with power less than the rated power. Further, the control section records, in a recording section (non-volatile memory), a control instruction which is issued to the lamp power supply section during low power operation.

Abstract: A display device (10) includes a display (12) used to display an image, and a handle (14) attached to a recess (13) formed in a rear face (12a) of the display (12). The handle having a Z-shape in a side view connects between a first holder (17) and a second holder (18) via a connecting part (19). The second holder (18) is projected outside the display device so as to achieve an easy-to-hold ability when the first mounting face (17a) of the first holder (17) is fixed to the recess (13) of the display device (10). The first holder (17) is kept inside the thickness of the display device (10) when the second mounting face (18a) of the second holder (18) is fixed to the recess (13).

Abstract: In the disclosed backlight unit, multiple LEDs are arranged as a light source at prescribed intervals on a substrate in a rectangular ring. Light irradiated from the LEDs is diffused through a lens, a prism plate and a diffusion plate, and is transmitted to a liquid crystal panel. There are roughly V-shaped concavities in the incidence surface of the lens, and triangular cross-section prisms for diffusing incident light are further arranged on the incidence surface of the prism plate. The LEDs are arranged on a highly thermally conductive LED cooling pattern, and the LED cooling pattern is in contact with a heat-dispersion housing. For that reason, heat emitted by the LEDs is conducted from the LED cooling pattern to the housing and dispersed to the ambient air. By this means, the backlight unit can save energy and be more compact.

Abstract: A multi-screen display system has a plurality of closely arranged display devices. A master device that is one of the display devices has a detection unit which detects that any of the display devices in the multi-screen display system has become not able to perform display; and a display control unit that controls display operation of the individual display devices according to a display method associated with a position in the multi-screen display system of each display device detected by the detection unit.

Abstract: A projection display apparatus comprises a lamp; a display element that modulates light emitted from the lamp according to an amplitude of the image signal, and emits the light as the image light; a light intensity controller that changes a lamp power according to a power changing operation, and, if the changed lamp power is lower than a rated power of the lamp and supplied to the lamp for a certain period of time, increases the lamp power and then reduces the lamp power to an original power, identifies an amplitude of the image signal where an intensity of the image light is constant before and after the change of the lamp power; and an image signal controller that controls the amplitude of the image signal to the identified amplitude, and supplies the display element with the image signal.