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7637619 |
Light source driving method and projector
An object of the invention is to provide a light source driving method for supplying electric power to a light source of a projector, and to provide a projector using this light source driving...
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7637621 |
Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatus
A projection optical system for use in an image projection apparatus illuminating an image display panel forming an image in accordance with a modulating signal with illumination light from a light...
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7631975 |
Projection optical system, magnification projection optical system, magnification projection apparatus, and image projection apparatus
A projection optical system for use in an image projection apparatus illuminating an image display panel forming an image in accordance with a modulating signal with illumination light from a light...
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RE41038 |
Securing device for transparent documents in a flatbed scanning system
A transparent document securing device, using in a flatbed scanner, includes a securing frame. The securing frame comprises at least a securing cell, wherein the securing cell further includes a...
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7611247 |
Illumination aperture for projection display
An optical system and method of increasing the contrast of a projected image. The optical system ( 1800 ) comprises a combination of aperture stops ( 1810, 1812 ) in at least one of the...
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7607785 |
Projection lens and projector
There is provided a projection lens for a projector which utilizes a reflection type display device, comprising a movable aperture 70 which is movable as a movable lens components moves, wherein...
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7600931 |
Lens cap device
A lens cap device having a cap protecting device, an actuating device, and a lens cap. The cap protecting device has a protecting cap with a lens exposure hole. The actuating device has a push...
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7591560 |
Reflection optical system and projection display apparatus using the same
A reflection optical system placed between a light valve 5 and a screen 4 , wherein curved surfaces are only three reflection surfaces of first to third mirrors 1 to 3 , and satisfies the...
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7588337 |
Optical system and image projection apparatus
An optical system is disclosed which is capable of improving of its contrast characteristic and displaying of images which have a brightness according to the brightness of the use environment. The...
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7575330 |
Method and apparatus for increasing effective contrast radio and brightness yields for digital light valve image projectors
The present invention is a method and apparatus for increasing the effective contrast ratio and brightness yields for digital light valve image projectors using a variable luminance control...
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7566134 |
Protection type display device
A projection-type display device includes a shielding unit and image signal correction units that divide the picture plane of the spatial light modulation element into a plurality of areas and...
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7562985 |
Mirror assembly with integrated display device
A mirror assembly ( 18 ) for displaying an image ( 15 ) in conjunction with the reflection ( 14 ′) of a viewer comprises a mirror ( 2 ), which is equipped with a reflective polariser ( 13 ),...
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7530695 |
Projector
Aspects of the invention can provide a projector that can include a light source unit, an optical modulation element that modulates light from the light source unit on the basis of image data, a...
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7530698 |
Positioning device for a projection apparatus
A positioning device for positioning an integration rod module disposed in an optical path between a light source device and a projection lens within a projection apparatus includes a flexible...
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7517088 |
Light projector
A light projector, including an elongate housing assembly and a tubular light chamber assembly that comprises a plurality of tubular components and is coaxially enclosed by the housing assembly,...
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7517094 |
Projection device
In a projection device including a reflective light modulator for generating an image, a light source unit for illuminating the light modulator, and projection optics which include first and second...
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7517092 |
Method and system for dynamic gradient light filtering
A light filter for use in an optical system for displaying image. The light filter comprising, a substantially transparent substrate and an optical coating applied to the substrate. The optical...
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7506986 |
Projection type video display
A light source comprises a lamp such as an ultra-high pressure mercury lamp or a metal halide lamp and its irradiated light is emitted after being parallelized by a parabolic reflector. The...
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7494228 |
Compact mixing cavity for multiple colors of LEDs
For mixing different light colors from different LEDs or energized phosphors, an elongated mixing tunnel is used having a reflective inner surface. LEDs of different colors are optically coupled...
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7488079 |
System and method for projecting images onto a moving screen
A shaped screen rotates through one or more projected images of two or more projectors operating simultaneously, resulting in a dynamic, kinetic image surface which may be viewed equally well from...
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7488077 |
Objective for a projection apparatus, and corresponding front-projection or backprojection apparatus
The invention relates to a projection objective comprising at least one lens and intended to transmit a divergent light beam onto a flat screen. A hyperbolically shaped mirror is oriented so as to...
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7477035 |
Dynamic aperture driving apparatus and method for reducing vibration
The present invention generally relates to a dynamic aperture for controlling the intensity of light of projection lens, more particularly to a dynamic aperture driving apparatus and method for...
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7472998 |
Variable aperture display device
A display device able to give an image giving a good impression such as a sharp contrast in a dark scene and maintaining brightness in a bright scene, that is, a display device comprising a...
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7470030 |
Cabinet-surface-mounted projection lens and methods
A projection system includes a cabinet having a surface with an aperture therein, a projector disposed within the cabinet, adapted to project light through the aperture in the surface of the...
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7452085 |
Dynamically adjustable fold-mirror assembly for projection device
An apparatus, system, and method for a fold-mirror assembly with a dynamically adjustable mirror element for use in a projection device are disclosed herein.
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7453070 |
Methods and apparatus for beam density measurement in two dimensions
A beam density measurement system includes a shield, a beam sensor, and an actuator. The beam sensor is positioned downstream from the shield in a direction of travel of a beam. The beam sensor is...
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7438423 |
Illumination system and projection system incorporating same
An illumination system and a projection system incorporating same are disclosed. The illumination system includes a two-dimensional array of independently operable light sources. Each light source...
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7431464 |
Projection display system with diffractive linear display device
A projection display system in which light use efficiency and image brightness are enhanced by collecting and using substantially all of the light that has been diffracted from a diffractive linear...
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7413313 |
Optical shutter with rotational axis in light path of projection device
An apparatus, system, and method for an optical shutter with a rotational axis in the light path of a projection device are disclosed herein.
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7413314 |
Optical system with iris controlled in real time
An optical system having an iris controlled in real time and a control method of amount of light thereof. The optical system includes a light source, a light modulator modulating a light emitted...
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7399088 |
Pupil mismatch in a collimated display system
An image projection system has a first lens with a defined entrance pupil. An image source has an image field and a defined exit pupil. The exit pupil of the image source is configured such that...
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7399093 |
Reflection mirror of projection television and fabrication method thereof
Disclosed is a reflection mirror of a projection television to prevent the frame of the projection television from being deformed and to fabricate the projection television with ease. The...
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7397536 |
Projection image display apparatus
A projection image display apparatus is equipped with a light shielding member for partially shielding the illumination light from the illuminating optical system so as to reduce the image...
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7394057 |
Illuminating device and image display device using the same
An illuminating device according to the present invention comprises a first reflector for irradiating forward light beams from a light source, a second reflector that has an aperture and is...
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7390098 |
Projection lens, and projection display apparatus and rear projection display apparatus using the projection lens
A projection lens that, though designed for right projection, shows good aberration performance and can realize specifications required for a projection display apparatus, such as a low F number, a...
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7387388 |
Illumination system using polarization conversion
An apparatus and method is discloses for providing a substantially uniform, homogenous, polarized light. A beam of substantially un-polarized light is provided by a conventional light source. The...
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7370972 |
Two-dimensional image display device
In a two-dimensional image display device, speckle noise is reduced by a simple construction. A two-dimensional image display device for displaying an image by projecting coherent light onto a...
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7364310 |
Image projection system
The overlapping portions of an image composed of partial images projected on a dome-shaped screen from image projecting means are shaded in light by means of light shading mechanisms which are...
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7364309 |
Image projector and image projecting method
In an image projection on a screen, an image projection apparatus improves the safety of entry into a projection region by the human body and does not bring about the increase of complexity of the...
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7347569 |
Correcting apparatus for projection system
The present invention provides a correcting apparatus for correcting images projected from a projection system. The correcting apparatus includes a correcting module and a projection lens. The...
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7344255 |
Light amount adjusting apparatus and projector using the same
At least a pair of light amount adjusting plates is allocated at peripheral side rim portions of a light path through which light from a light source is projected. These light amount adjusting...
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7344256 |
Projection type image display apparatus
A DMD (digital micromirror device) includes a substantially rectangular element face made up of plural mirror elements arranged in a matrix. The DMD is provided with a light shielding cover having...
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7338174 |
Shutter device and projection type video display
Each shading plate comprises a rotating shaft and a driving shaft arranged vertically. First divided shading plate is loosely fitted to and supported by (not adhere to) the rotating shaft and...
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7329035 |
Child's nightlight
There is disclosed a nightlight that can be held or worn by a child and that can display projected images in 3-D mode upon a flat surface to comfort and provide assurance for a child when left in...
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7325933 |
Projection type video display apparatus
A projection type video display apparatus in which a display device transmits light emitted from a light source to project a video written into the display device is characterized by comprising...
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7322706 |
Device for adjusting light intensity for discharge lamp projectors
The invention relates to a device for adjusting light intensity for discharge lamp projectors with an optical assembly that contains a spherical mirror and a discharge lamp, and a Fresnel lens...
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7318645 |
Beam splitter
A beam splitter includes a first member having at least a first dichroic layer, and a second member having at least a second dichroic layer, the first member being crossed relative to the second...
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7300158 |
Projection display apparatus
The invention concerns a display apparatus with an imager illuminated by an illumination system and with an imaging system projecting an image on a viewing screen, wherein the brightness of the...
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7287864 |
Light amount adjusting device and projector using the same
A light amount adjusting device is assembled in a projector having a light source and a projection device projecting light from the light source on a screen through an image forming panel. The...
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7286278 |
Methods for depositing, releasing and packaging micro-electromechanical devices on wafer substrates
A method for forming a MEMS device is disclosed, where a final release step is performed just prior to a wafer bonding step to protect the MEMS device from contamination, physical contact, or other...
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