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: 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: 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: 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.

Abstract: A switching power supply includes: transformer 60 which includes a primary winding and a secondary winding and outputs, through the secondary winding, an AC voltage based on the current supplied to the primary winding; switching element 61 which controls current supply to the primary winding; rectifying/smoothing circuit 65 which converts the AC voltage output from the secondary winding into a DC voltage; voltage detecting circuit 62 which detects the DC voltage converted by rectifying/smoothing circuit 65; feedback amplifier 63 which is supplied with the DC voltage detected by voltage detecting circuit 62 as one input and which is supplied with a reference voltage as the other input, so as to output a difference between the input voltage values; and control circuit 64 which controls switching element 61, so as to eliminate the difference detected at feedback amplifier 63.

Abstract: A display device includes: a display panel that displays an input video signal; and a video recording and reproduction unit that records and reproduces a video picture to be displayed on the display panel. The video recording and reproduction unit includes an image-size setting unit that reduces a size of a screen of the input video signal according to a multi-display configuration.

Abstract: An image projection device includes a light source that emits a plurality of colored lights and a projection section that modulates each colored light emitted by the light source according to image data and projects an image onto a projection surface, a storage section that stores projection surface information indicating a spectral reflectance of the projection surface, and a correction section that determines, when the image data is received, a correction value for correcting a color shift in the image on the projection surface using the projection surface information, and corrects an intensity value of a colored light emitted by the light source by controlling the light source according to the correction value.

Abstract: A cooling structure for light emitting elements for a liquid crystal panel according to the present invention includes: a long-shaped substrate that is disposed so as to extend along an edge of a light guide plate provided on a rear surface of a liquid crystal panel, and in which a plurality of through-holes are formed; a plurality of light emitting elements that are disposed on a front surface of the substrate so as to face the light guide plate; and a chassis that is provided at a rear surface side of the substrate, and the through-holes are arranged at a higher density at a center portion of the substrate in a long direction than at end portions of the substrate in the long direction.

Abstract: A moving image distribution server for distributing to a reproducing apparatus moving image data including video data and audio data and capable of prescribing decoding times and reproducing times for the video data and the audio data, the moving image distribution server including a data storage unit for storing in advance the moving image data including information as to the decoding times and the reproducing times for the video data and the audio data, a phase adjustment variable storage unit for storing a predetermined phase adjustment variable, and a first rewriter for reading the moving image data stored in the data storage unit, and changing the information included therein as to the decoding times or the reproducing times based on the predetermined phase adjustment variable to adjust the phase relationship between the video data and the audio data.

Abstract: A projector includes a plurality of light source boxes (1R, 1G, 1B) each accommodating at least one solid-state light source, emission colors of accommodated solid-state light sources being different from each other, a plurality of photodetectors (205c, 206c, 207c) that are provided within respective light source boxes and that detect light from the solid-state light sources, a plurality of drive units (202 to 204) that supply current to solid-state light sources (205b, 206b, 207b) provided within respective light source boxes, and a controller (201) that holds a reference value for the solid-state light source provided within each light source box for each emission color, that causes each drive to supply current to the solid-state light source provided within each light source box, and that adjusts the amount of current output from each drive unit such that the output value of each photodetector is at a reference value which corresponds to the emission color of the solid-state light source which is a corresp

Abstract: A display device includes a calculation unit which calculates a required luminance according to a set luminance for each color of a backlight, for each of a first video signal and a second video signal, and obtains the higher of the required luminance corresponding to the first video signal and the required luminance corresponding to the second video signal as an objective luminance for each color based on a calculation result, a backlight driving unit which drives the backlight for each color according to the obtained objective luminance of each color, a detection unit which compares the required luminance with the objective luminance and detects, for each color, the required luminance corresponding to the video signal lower than the objective luminance, and a brightness adjustment unit which performs adjustment for each color so that an image corresponding to the video signal lower than the objective luminance is darkened.

Abstract: A light source apparatus includes excitation light sources, a phosphor unit, a dichroic mirror that reflects excitation light supplied from the excitation light sources toward the phosphor unit and that transmits fluorescent light emitted from the phosphor unit, and a collimator lens that is provided between the dichroic mirror and the phosphor unit and whose focal distance varies according to the wavelength. The phosphor unit is arranged at a position determined by the focal distance of the collimator lens for the fluorescent wavelength. The collimator lens includes low-dispersion lenses and a high-dispersion lens.

Abstract: A method of remotely adjusting a display device is provided which introduces the concept of Pages as a superordinate concept of VCPs known as control or adjustment item codes under current standards, defines the maximum value of the VCP Pages, and controls the VCP Pages from a personal computer, thereby to define and control more VCPs.

Abstract: The present invention seeks to realize a small etendu illumination optical system, a longer operating life and a higher brightness. The illumination optical system comprises: a laser light source that generates an excitation light; a fluorescent substance that generates a fluorescent light in response to the excitation light, a light tunnel that outputs the excitation light input at one end thereof to the fluorescent substance from the other end thereof, and that outputs the fluorescent light generated by the fluorescent substance from the one end thereof; and a mirror that is placed within a light path between the laser light source and the light tunnel, and that reflects the fluorescent light, the mirror having an aperture formed thereon that allows the excitation light to pass through.