Abstract: A projection display device projects light modulated based on a video signal. The projection display device includes a light source, a first fan for cooling the light source, and a second fan different from the first fan. The number of revolutions of the first fan is increased or decreased with the increase or decrease of the output of the light source. The number of revolutions of the second fan is decreased when the number of revolutions of the first fan is increased, and increased when the number of revolutions of the first fan is decreased.

Abstract: An image display device includes: a display unit that includes a plurality of display lines; a detection unit that detects presence of an input of a predetermined position information signal; a signal output control unit that instructs whether or not to output a position information signal in accordance with a detection result by the detection unit; a signal output unit that outputs the position information signal in a case of being instructed; a display direction switching control unit that instructs switching of a vertical display direction to the display unit in accordance with the detection result; an image data input unit that receives image data including data for each display line; and an image data transmission switching unit that switches a transmission order of the data for each display line in accordance with the detection result, and transmits to the display unit the image data.

Abstract: Provided is an illumination device that includes: light source (101); light guiding means (102) where light from light source (101) is supplied to one end surface, and light incident from the one end surface is propagated inside to exit from the other end surface; illuminating optical systems (103, 104, 106, and 107) that spatially separate a luminous flux output from the other end surface of light guiding means (102) into a plurality of luminous fluxes and that form, on display element (110), an optical image formed on the other end surface of light guiding means (102); reflective polarizing plate (109) that is located between illuminating optical systems (103, 104, 106, and 107) and display element (110) and that transmits first polarized light while reflecting second polarized light different in polarized state from the first polarized light toward illuminating optical systems (103, 104, 106, and 107); reflecting element (105) that is disposed at a position where the plurality of luminous fluxes are spatia

Abstract: A display device in the invention comprises an OSP section and OSD switches 10 configured to include a plurality of switches for performing various kinds of setting operations using the OSD section. In OSD switches 10, switches 10a and 10b are disposed on a right side of a front bezel 2 and switches 10c and 10d are disposed on a lower side of the front bezel 2. By that, the OSD switches can be disposed so that a switch operation can be visually performed without an uncomfortable feeling, without increasing the thickness of a front bezel even if the front bezel is narrow.

Abstract: The present invention is aimed at appropriately suppressing display failure such as a tailing phenomenon and the like in a normally white type liquid crystal panel. A driver (3) supplies a drive voltage in conformity with an image signal received by an image signal processing circuit (1), to a liquid crystal panel (4). A histogram detector (5) detects a histogram representing the relationship between the signal level of the image signal received by the image signal processing circuit (1) and the number of pixels. A CPU (6) calculates, based on the histogram detected by the histogram detector (5), a first proportion of the number of pixels (on the white side) whose signal level is equal to or greater than a first defined value, to the total number of pixels of the histogram and a second proportion of the number of pixels (on the black side) whose signal level is equal to or smaller than a second defined value that is smaller than the first defined value, to the total number of pixels of the histogram.

Abstract: This invention realizes an illumination optical system with a small etendue that has a longer lifetime and a high degree of brightness. The invention includes: a laser light source that generates excitation light; a phosphor that generates a fluorescent light by means of the excitation light; a light tunnel that projects the excitation light that is incident at one end towards the phosphor from another end, and projects a fluorescent light generated with the phosphor from the one end; and a dichroic mirror that is provided between the laser light source and the light tunnel, and that allows the fluorescent light or the excitation light to pass through, and reflects the remaining excitation or fluorescent light.

Abstract: A projection display device includes light sources having light-emitting elements for emitting lights in R, G, B colors, temperature sensors for the respective colors disposed near the light sources in the respective colors, light sensors for the respective colors disposed near the light sources in the respective colors for detecting light leakages from the light sources in the respective colors, a cooling unit for cooling the light sources in the respective colors, light modulators employing three panels of liquid crystal devices, a projection optical system, an amount-of-light controller for maintaining a predetermined ratio of the amounts of lights emitted from the light sources in the respective colors, and a cooling controller for controlling the cooling unit for the light sources in the respective colors.

Abstract: Provided is a projection type display device that has dust-proof and coolable optical components. According to an aspect of the present invention, the display device includes a case, a dust-proof structure that has a plurality of walls surrounding a plurality of optical components to prevent dust, and which is located in the case, and suction ports (7b and 7b?) formed in the case and configured to suck cooling air along one wall of the dust-proof structure to cool the optical components. The suction ports are separated into first suction port (7b) and second suction port (7b?) with a position of one wall set as a reference. First suction port (7b) is located to blow the cooling air to the dust-proof structure, while second suction port (7b?) is located to prevent direct blowing of the cooling air to the dust-proof structure. An area of first suction port (7b) is smaller than that of second suction port (7b?).

Abstract: An image display device includes a light source; a power supply section that supplies power to light source; a cooling fan that cools the light source; an input section; a drive section that supplies a voltage to cooling fan; a control section that controls drive section and power supply section. The control section sets a first power value for the output of the power supply section and also a first voltage value for the output of the drive section. The control section measures a time at which the light source has been lighted. If the measured value exceeds a threshold, the control section gradually increases the output of the power supply section up to a second power value that is greater than the first voltage value over a predetermined time.

Abstract: Illumination device includes a light source (101); an illumination optical system (102, 103, 104, 106, 107) that spatially splits each of the plurality of color light beams emitted from the light source, superimposes the split light beams of each of the plurality of color light beams, and emits the superimposed light beams to a display element (110); a reflective polarization plate (109) that is arranged between the illumination optical system (102, 103, 104, 106, 107) and the display element (110) and that transmits first polarized light and reflects second polarized light whose polarization state is different from that of the first polarized light toward the illumination optical system (102, 103, 104, 106, 107); a reflection element (105) that is arranged at a position where each of the plurality of color light beams is spatially split by the illumination optical system and that transmits the split light beams of each of the color light beams and reflects, of the split light beams of each of the color light

Abstract: Provided is an illuminating device that includes: first light guiding means (3) where light incident from one end surface is propagated inside to exit from the other end surface; illuminating optical system (1) that spatially separates a luminous flux from the other end surface of first light guiding means (3) into a plurality of luminous fluxes, and forms an optical image formed on the other end surface of first light guiding means (3) on display element (12); reflective polarizing plate (11) that is located between illuminating optical system (1) and display element (12), and transmits first polarized light while reflecting second polarized light different that is in polarized state from the first polarized light toward illuminating optical system (1); reflecting element (7) that is disposed at a position where the plurality of luminous fluxes are spatially separated, and that includes transmission regions through which the plurality of luminous fluxes are transmitted, and a reflecting film formed in a regi

Abstract: Provided is a LED light source box that includes: case (10) having body (11) and cover (13) to hermetically seal opening (12) of body (11); light source unit (15) having LED tight source (51) and holder (50) on which LED light source (51) is mounted; and cooling unit (61) having first cooling member (60) in contact with holder (50) and second cooling member (61) in contact with first cooling member (60). Holder (50) is fixed to cover (13) by fixing member (55) in a state where cooling unit (16) is sandwiched between holder (50) and cover (13). Heat insulation member (70) is disposed between holder (50) and fixing member (55), and air gap (91) is disposed between the outer peripheral surface of holder (50) and the inner peripheral surface of body (11).

Abstract: An illumination optical system includes: a light source emitting light of a first wavelength; a fluorophore unit; an optical element and a quarter-wave plate between the optical element and the fluorophore unit. The fluorophore unit has a reflection region and a fluorophore region that gives off fluorescent light of a different wavelength than the first wavelength when irradiated by light of the first wavelength. The fluorophore unit is able to move such that the light from the light source sequentially irradiates the fluorophore region and the reflection region. The optical element separates the light of the first wavelength into a first linearly polarized light component and a second linearly polarized light component that is orthogonal to the first linearly polarized light component.

Abstract: A cushioning material includes a recess forming member that includes a protecting member and an engaging member to form a recess that contains inside an edge portion of a thin display device, and moreover on a rear frame that is positioned on a back surface of the thin display device a handle is provided that forms a gap between a display screen of the thin display device and a protecting member of the cushioning material that is positioned in front of the display screen by engaging and holding the engaging member of the cushioning material in a state of the edge portion of the thin display device being contained in the recess of the cushioning material.

Abstract: A light source lamp lighting device includes a light source lamp, cooling means for cooling the light source lamp, an extinguishing time measurer that calculates extinguishing time information indicating an extinguishing period when the light source lamp was last switched off to a present time, a storage that stores lighting performance, which is a history of successes and failures of lighting the light source lamp, a plurality of cooling times corresponding to an extinguishing period when the light source lamp is switched off indicated by the extinguishing time information as a cooling time for causing the cooling means to operate, and a first threshold set with respect to the lighting performance, and a controller that reads out, in lighting the light source lamp, the lighting performance, the cooling time stored in the storage based on the extinguishing period when the light source lamp is switched off calculated by the extinguishing time measurer, and the first threshold and, when a number of successes of