Abstract: A projector including a discharge tube as a light source includes a light source driver that supplies the discharge tube with electric power and an electric power control portion that controls the level of the electric power with which the light source driver supplies the discharge tube to perform a normal mode in which the light source driver supplies electric power of a predetermined electric power level and a power saving mode in which the light source driver supplies electric power of a power saving level lower than the predetermined electric power level. The power saving mode is a mode in which light emission from the discharge tube can be maintained.

Abstract: A vehicle puddle lamp assembly is provided and includes a plurality of light projectors located on a vehicle and configured to illuminate different lighted image patterns on a ground surface adjacent to the vehicle. The vehicle puddle lamp assembly also includes a controller for sequentially activating the plurality of light projectors to generate an animated lighted image on the ground surface.

Abstract: A projector is provided which includes a light source unit which can reduce the numbers of lenses and mirrors and which can control quantity of light of each color. A light source unit of the invention includes a laser light source unit 70 which has a plurality of red laser elements 71R and a plurality of blue laser elements 71B as two types of laser emitting elements 71 which emit light of wavelength bands which are different from each other and in which the pluralities of red and blue laser emitting elements 71R, 71B are arranged in a planar fashion, a diffusing unit which is disposed on an optical path of light emitted from the laser light source unit 70 to diffuse the light emitted from the laser light source unit 70, and a light source control unit for controlling the illumination of the laser emitting elements 71R, 71B.

Abstract: The present invention provides a projection type display apparatus for displaying an image by which reduction of contrast is suppressed, including: a light source; a first lens array and a second lens array having a plurality of lens cell areas; a collecting lens; a display element; a projection lens; and a light shielding unit which light-shields the light fluxes from the first lens array to the second lens array, wherein the light shielding unit light-shields at least parts of all the lens cell areas except for the lens cell area in contact with an optical axis among a plurality of rectangular lens cell areas of the second lens array, and a light shielding area in the lens cell area in contact with the optical axis is smaller than that in any of the lens cell areas except for the lens cell area in contact with the optical axis.

Abstract: An illumination device includes a substrate including a fluorescent layer, and capable of rotating around a predetermined rotary shaft, a light source adapted to emit an excitation light adapted to excite the fluorescent layer, and a control device adapted to control emission of the light source so that, when the substrate is rotating, a first area of the fluorescent layer is irradiated with the excitation light in one round, and at least a part of the first area is not irradiated with the excitation light in another round.

Abstract: A wavelength conversion element includes a phosphor layer that includes phosphors and a binder. The thickness of a phosphor region obtained by multiplying the thickness of the phosphor layer by the volume concentration of the phosphor is equal to or larger than 15 ?m.

Abstract: An image display apparatus includes a light source device, a light source control unit which controls power supplied to the light source device and an image light emission unit which, utilizing a source light emitted from the light source device, emits an image light. A light quantity measurement unit measures a quantity of the source light. A power/light quantity characteristic derivation unit derives a power/light quantity characteristic. A light quantity adjustment unit, based on the power/light quantity characteristic, adjusts the quantity of the source light or the image light. The light source control unit controls the supplied power to gradually change the light quantity of the source light. The light quantity measurement unit measures the light quantity of the gradually changing source light and acquires light quantity data. The power/light quantity characteristic derivation unit, based on the light quantity data and the supplied power, derives the power/light quantity characteristic.

Abstract: The present invention provides a light source apparatus (10) for use with a projector (80) and a method for combining laser beams of different polarization characterized in that an overall efficiency for the reflection and transmission exceeding 97% is achieved. A first white laser light beam (18) having a first polarization is combined with a second white laser light beam (28) having a second polarization that is orthogonal to the first polarization by utilizing a multi narrow-band polarizing beam splitter (20) positioned to receive the first and the second white laser light beams (18, 28). Embodiments of the present invention utilize two laser light sources (12, 22) emitting two sets of laser light beams with multiple wavelengths (14, 15, 16 and 24, 25, 26).

Abstract: A laser projection light has a light blocking wall and safety sensor to prevent people from directly looking into the laser beams to harm their eyes. The laser projection light may be an AC powered laser projection light or a DC powered battery operated unit, and may also incorporate a UL listed LED light device to that provides an LED light device function in addition to the projection function in case people do not want to see the laser projection light performance and wish to switch off the laser beam.

Abstract: A coupling lens for coupling first light having a first wavelength from a first light source with a second light having a second wavelength from a second light source disposed adjacent to the first light source in substantially the same direction includes a first surface disposed to face the first and second light sources, the first surface including a first region transmitting the first light and having a first region curvature and a second region transmitting the second light and having a second region curvature, and a second surface opposite to the first surface and having a second-surface curvature. A position of a center of the first region curvature differs from a position of a center of the second region curvature. A center of the second surface curvature and the center of the first region curvature are disposed on an optical axis of the first or second light source.

Abstract: A projection system (900) includes a scanner (802) and light source (801). The scanner (802) is configured to crate a scan cone (994) for forming images (995). A principal beam (992) defines a traveling direction of the scan cone (994). An optical device (880) having decentered, free-form major faces is disposed at an output of the projection system (900) such that the scan cone (994) passes through the optical device (880). The optical device (880) is configured to redirect the principal beam (992), and accordingly the traveling direction of the scan cone (994), by a predetermined amount and to correct both anamorphic distortion and vertical smile distortion initially present in the image.

Abstract: A front projection display device is provided including an image-generating source configured to generate an image, a wide angle lens system adapted to receive the image, and a screen. The wide angle lens system may be configured to increase distortion of the image in a first stage and decrease distortion of the image in a second stage. The screen may be configured to receive the image from the wide angle lens system on a first side and reflect the image back to a viewer on the first side. In another embodiment, a screen is provided for a front projection system, the screen may be configured to receive light from a steep angle and may include any number of surface topographies configured to reflect light back to the viewer along a desired viewing plane.

Abstract: A dynamic iris controller includes: a diaphragm and video-image controller including a video-image analyzer analyzing a picture signal, an association setting unit setting a diaphragm stop of a diaphragm mechanism, a color balance correction value, and a lightness correction value according to analysis data analyzed in the video-image analyzer, and a black period controller setting a black period in the picture signal according to a predetermined black time length; a diaphragm driver outputting a drive signal to the diaphragm mechanism so as to set the diaphragm stop of the diaphragm mechanism to be fully closed for the black period set by the black period controller and to set the diaphragm stop to have a value set by the association setting unit for the other period; and a video-image processor correcting color balance and lightness of the picture signal using the correction data set in the association setting unit.

Abstract: In a laser source module aligning laser beams from laser sources for three colors, red, green, and blue on a single combined beam optical axis, decreasing relative displacements of beam spots of three colors, occurring due to thermal deformation by temperature rise, is achieved by a laser source module including plural laser sources, each incorporating a laser having a laser chip installed on a heat sink and a lens converting a light radiated from the laser into a laser beam, and a beam combining unit aligning the laser beams from the laser sources on a single combined beam optical axis, wherein the lasers in at least two or more ones of the laser sources are arranged so that their laser beams will be decentered toward a same direction on the combined beam optical axis upon displacement of an emission point of the laser chip away from the heat sink.

Abstract: An object of the present invention is to provide an optical multiplexing apparatus and a projector that keep an optical system small, and easily adjust a number of light source units. The optical multiplexing apparatus has: a light source section that uses light source units to emit collimated beams; a first lens portion that converges the collimated beams which enter at different incident angles from each other to define converging positions; and a second lens portion that has focal points that correspond to the converging positions, respectively, wherein the first and second lens portions form an optical reduction system, and an optical axis of the second lens portion, which is directed to the corresponding focal point to one of the converging positions, extends along another optical axis of the second lens position, which is directed to the corresponding focal point to another of the converging positions.

Abstract: A projector includes a lighting device that emits light of a plurality of colors, a plurality of vertical alignment mode reflex-type liquid crystal light valves that modulate the color light, a phase difference compensation plate including a C-plate and an O-plate provided between the lighting device and the liquid crystal light valve, a color synthesizing element that synthesizes the color light after modulation, and a projection optical system that projects the synthesized light to a projection target face, and a front side phase difference value of the phase difference compensation plate corresponding to at least one liquid crystal light valve is different from a front side phase difference value of the other liquid crystal light valves.

Abstract: A projection display device is provided with a main body cabinet; a projection port which is formed in the main body cabinet to guide modulated light to an outside of the projection display device; an air outlet which is formed at least in one of two surfaces of the main body cabinet facing each other across the projection port; and an exhaust unit which discharges, to the outside, air that has been warmed by heat exchange with a member to be cooled which is disposed in the main body cabinet through the air outlet. In this arrangement, the exhaust unit includes an exhaust fan, and a deflection member which deflects air discharged from the exhaust fan in a direction away from the projection plane.

Abstract: A light-adjusting unit includes: a light-shielding plate centered an optical axis of an incoming light flux and configured to block the light flux in response to the amount of rotation; a rotation transmitting gear configured to hold and rotate the light-shielding plate; a supporting shaft configured to rotatably support the rotation transmitting gear; and a supporting substrate on which the supporting shaft is provided, and the light-shielding plate is provided on one surface side of the supporting plate, and the rotation transmitting gear is provided on the other surface side of the supporting substrate opposite to the one surface side.

Abstract: A projector includes a measurement unit having a function of measuring at least two of a period during which the projector remains powered on, a period of an in-use state in which a user is using the projector, and a period of a non-use state in which the user is not using the projector; and a control unit having a function, of determining an in-use state ratio or a non-use state ratio associated with the projector based on the periods measured by the measurement unit and a function of executing an energy saving setting based on the in-use state ratio or the non-use state ratio.

Abstract: A light source device which can prevent deterioration of a polarization rotation element and an adhesive for bonding the polarization rotation element is to be provided. A light source device includes a polarization separation element obtaining first polarization and second polarization by separation and a polarization rotation element converting a polarization component aligned in a second polarization direction into a polarization component aligned in a first polarization direction.