Abstract: An image geometric correction device 6 unifies the coordinate systems of images captured by image capturing devices 4-1 and 4-2 into a coordinate system, and makes a geometric correction to the images projected by image projection devices 1-1, 1-2, and 1-3 on the basis of an image projection region E in the coordinate system into which the coordinate systems of the captured images are unified. As a result, the image geometric correction device can make a geometric correction to the projected images without strictly placing the image capturing devices 4-1 and 4-2 at predetermined positions.

Abstract: A light source adjusting device and a projection system comprising the light source adjusting device are provided. The projection system further comprises a light source module which is capable of providing a first beam with a first wavelength. The light source adjusting device comprises a first angle selecting layer, a wavelength converting layer and a second angle selecting layer. The first angle selecting layer receives the first beam and allows a first portion of the first beam to pass therethrough to form a second beam that also has the first wavelength. The first portion of the first beam is a portion of the first beam that is less than an incident angle. The wavelength converting layer receives the second beam transmitted from the first angle selecting layer and converts the second beam with the first wavelength into a third beam with a second wavelength.

Abstract: Disclosed embodiments include stereoscopic systems having at least one compensator operable to reduce the sensitivity of polarization control over incidence angle of image source optics and analyzer optics. In an exemplary embodiment, the disclosed compensator is operable to compensate polarization changes induced by optics at either or both the image source subsystem and the analyzer subsystem, in which the polarization changes would be operable to cause leakage at the analyzer subsystem if uncompensated. As such, the disclosed compensators and compensation techniques are operable to reduce leakage at the analyzer subsystem even if the disclosed compensator may be located at the analyzer subsystem.

Abstract: A light collecting optical system includes surface-emitting light sources, collimate lenses, and a condenser lens. Light emitting surfaces of the surface-emitting light sources have a rectangular shape of the same size as each other, and have a similar figure to an incident surface of an integrator rod, the collimate lenses are disposed so that the optical distances from the collimate lenses to the condenser lens are approximately the same, and the surface-emitting light sources are disposed so that the optical distances Lr, Lg and Lb from the light emitting surfaces to the collimate lenses satisfy Lb<Lg<Lr and so that images of the light emitting surfaces, which are formed on the incident surface of the integrator rod by the collimate lenses and the condenser lens, have approximately the same size.

Abstract: A projector includes a lens driving section that drives a lens section having a projection lens, an accepting section that accepts first control value indication information indicating a first control value including a drive instruction value of the lens section, a determining section that determines whether a drive instruction direction for the lens section is a first drive direction that is same as the last drive direction or a second drive direction that is different from the last drive direction, and a control section that drives the lens section by using a second control value whose drive instruction value is greater than the drive instruction value of the first control value in case that the drive instruction direction is the second drive direction.

Abstract: Cooling air conveyed through a cooling duct 3 is supplied to a discharge lamp 10 via a cooling air exit 21 having a plurality of flow paths 23a to 23c partitioned by a partition plate 22. An air flow direction changeover section 24 changes a flow path through which the discharge lamp is supplied with the cooling air from the cooling air exit. An air flow blocking ball 25 in the air flow direction changeover section moves by its own weight through a guide portion 26 to thereby block the flow path of the cooling air exit. This allows the cooling air to be directed specifically toward an upper side 11a in a direction of gravity of a lamp bulb of the discharge lamp to eliminate a temperature difference, even if a mounting style of the discharge lamp is varied among desk mounting, ceiling mounting, and vertical mounting.

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: A projection type display includes an optical system that includes a focus lens and is configured to project an image, a driver configured to move the focus lens along an optical axis, a phase difference sensor configured to receive light of the image that has been projected, and a controller configured to calculate a phase difference based on an output of the phase difference sensor, to calculate an in-focus position based on the phase difference that has been calculated, and to move the focus lens via the driver to the in-focus position for a focus control of the optical system, wherein the controller provides the focus control while a current position of the focus lens is located within an allowable range that is previously set in a movable range over which the focus lens can move along the optical axis.

Abstract: A projector includes a projection light source, a light-off detector that detects that the projection light source is shut off, and a relighting controller that carries out a relighting process for relighting the projection light source based on the detection performed by the light-off detector as a trigger.

Abstract: Self-aligning mechanisms hold a condenser housing. The condenser housing is moved toward an integrator while tapered surfaces of the condenser housing of an LED light source unit are inserted along condenser lens guides of a projection unit. LED light source unit datum surfaces and datum surfaces of the projection unit abut against each other, and the tapered surfaces of the LED light source unit can no longer move toward the integrator along the condenser lens guides of the projection unit. In this state, the LED light source unit and the projection unit are coupled to each other.

Abstract: A projector includes a plurality of light modulation devices and a cooling device. The cooling device includes a cooling fan configured to introduce and discharge air, and a duct configured to guide air received from the cooling fan toward the plural light modulation devices. The duct includes a first duct portion configured to allow the air to flow through the light modulation devices from sides of the light modulation devices, and a second duct portion which communicates with the first duct portion and guides a part of the air flowing through the first duct portion toward devices other than the light modulation devices.

Abstract: A stereoscopic image projection system including: a beam projector for projecting a left eye image and a right eye image in a side by side format; a stereoscopic image adaptor for alternately projecting the left eye image and the right eye image onto a screen in a time sequence; and a shutter controller for synchronizing a time sequential operation of the stereoscopic image adaptor and opening and closing of right and left shutters of a user shutter glasses.

Abstract: In a projector which includes a light source unit 63, a light smoothing unit, a display device, a projection side optical system and a projector control unit, the light source unit 63 includes a light generating device for generating light of a specified wavelength band which includes a first light source 152 which is a light emitting diode or solid-state light emitting device for emitting light of a predetermined wavelength band, a second light source 153 which is a light emitting diode or a solid-state light emitting device for emitting excitation light, and a third light source 154 for emitting light of the same wavelength band as that of the first light source 152 using the light emitted from the second light source 153 as excitation energy, and the third light source 154 is formed by a phosphor which transmits light from the first light source 152 and absorbs light emitted from the second light source 153.

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: An image display device includes: at least one illumination system adapted to emit a light beam; at least one light modulation element adapted to modulate the light beam emitted from the illumination system; and a projection optical system adapted to project the light beam modulated by the light modulation element, wherein a proceeding direction of a principal ray of the light beam modulated by the light modulation element is nonparallel to an optical axis of the projection optical system when the light beam modulated by the light modulation element enters the projection optical system.

Abstract: A color splitter and combiner system includes a first transparent member located on an optical path between a first polarization beam splitter and an optical path combiner, and a second transparent member located on an optical path between a second polarization beam splitter and an optical path combiner. 0.05 (mm)<|t1/?1?t2/?2|<1.00 (mm) is met, where t1 is a thickness of the first transparent member, t2 is a thickness of the second transparent member, ?1 is an Abbe number of a material of the first transparent member, and ?2 is an Abbe number of a material of the second transparent member.

Abstract: An image display apparatus includes an image display element configured to display an image by controlling a polarization state of a polarized light beam. An illumination optical system guides the polarized light beam to the image display element. A polarizing beam splitter disposed between the illumination optical system and the image display element selectively splits polarization of incident light. A projection optical system projects the image displayed by the image display element onto a projection plane. The positional relationship between the polarizing beam splitter and an optical axis of the projection optical system is properly set.

Abstract: An apparatus, system, and method are disclosed for a vehicle mounted display device which can be easily attached to a vehicle and is removable. The projector can conveniently be plugged into the trailer light power source to give the device power to project an image onto a vehicle. The projector may be digital allowing the owner to choose an image from inside the vehicle. A magnetic or adhesive screen may be placed on the vehicle to allow the image to function properly and effectively on dark paint or other finishes that prevent a clean image. The apparatus comprises an adjustable mounting unit, an adjustable arm, and a projector which can all be adjusted to provide an efficient angle to project the image onto the vehicle.

Abstract: The invention describes a method of controlling a lighting of a room (1) in accordance with a still or moving image (2) projected onto a projection surface (3s), which method comprises optically measuring a number of characteristic features (f) of the projected image and adjusting the room lighting of the room on the basis of the measured characteristic features (f). Furthermore, the invention relates to a system for controlling the lighting of a room (1) in accordance with an image (2) projected onto a projection surface (3s), to a control device (9) for use in such a system, and to a projection screen device (3) for use in such a system. Moreover, the invention relates to a room lighting system (1) for lighting of a room in accordance with an image (2) projected onto a projection surface (3s).

Abstract: A packaging product for projectors is described, wherein the package contains a projector which has been preloaded with program material for projection, and wherein a prospective purchaser of the projector may see a preview of the program material which is contained in the projector. The controls for the projector are available within an opening in the package, and a visible light reflective surface is provided to view the projected image. In this manner, the prospective purchaser will obtain an idea of the nature of the program material contained within the projector, as well as being able to determine the functionality of the projector and, to a greater or lesser extent, the quality of the projection.