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...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
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| Number | Title | Issue Date |
| 8162488 | Projection display apparatus A projection display apparatus includes a light valve, a light source for producing light directed to the light valve, an integrator lens disposed in an optical path extending from the light source to the light valve and including a first lens array and a second len... | 04/24/2012 |
| 8061855 | Projection apparatus A projection apparatus including an image display element for modulating illumination light, an illumination optical system for irradiating the illumination light onto the image display element, a projection optical system for projecting the modulated light by the i... | 11/22/2011 |
| 8052285 | Projection display having improved light shielding bodies for adjusting the amount of light applied to a light valve therein The invention provides a projection display that achieves continuous light amount control with ease and without causing unevenness of illumination of light applied to a light valve responsive to a video signal, thereby allowing constant image display with satisfacto... | 11/08/2011 |
| 7993018 | Projection optical system and light amount adjusting component used in the same A light amount adjusting component adapted a projection optical system is provided. The light amount adjusting component has a light incident surface upon which a light beam impinges, and the light incident surface is provided with a surface structure for irregularl... | 08/09/2011 |
| 7993017 | Projection display apparatus A projection display apparatus 101 in which the light quantity adjusting means has a simple and readily interchangeable structure, and which can improve image quality by adjusting the quantity of light received by a light valve continuously, without causing i... | 08/09/2011 |
| 7980707 | Audience scanning laser display projector and associated methods An apparatus and method for an audience scanning laser display projector includes a laser projector capable of generating a laser beam output having a predetermined beam path, scan area and beam wavelength. A beam position sensor is associated with said laser projec... | 07/19/2011 |
| 7967450 | Light amount control device and projector A light amount control device that controls an amount of light acquired from a light source provided in an image display apparatus includes: a pulse generator; an operation processing portion for light amount control that outputs a transfer start signal at timing wh... | 06/28/2011 |
| 7901089 | Optical system with array light source An optical system, projector and method are provided that include a projection gate between a light source array and a projection lens. The projection lens projects an image of the projection gate. A relay lens group between the light source array and the projection... | 03/08/2011 |
| 7887198 | Optical device and projection type video display including optical device An optical device includes a light source, a light valve and a projection lens configured to enlarge an image to be displayed on the light valve. The light valve is disposed in the vicinity of an object plane of the projection lens. The light source illuminates a pe... | 02/15/2011 |
| 7883218 | Projector having a light tunnel clip for suppressing positional deviation of a light tunnel A projector capable of preventing a light tunnel from positional deviation is obtained. This projector comprises a rectangular light tunnel having a hollow light guide path capable of passing light therethrough for shaping the light with the light guide path, an opt... | 02/08/2011 |
| 7878663 | Image display apparatus Provided is an image display apparatus, including: a light modulation element; an illumination optical system which includes at least one light source unit including a plurality of light emitting units two-dimensionally arranged and illuminates the light modulation ... | 02/01/2011 |
| 7841727 | Projection optical system having a light blocker A projection optical system includes a digital micro-mirror device and a light blocker disposed along the light path of the digital micro-mirror device. The digital micro-mirror device includes a base having a plurality of outer pads, a micro-mirror array disposed o... | 11/30/2010 |
| 7798653 | Projection display and optical aperture unit A gear portion meshing with the first step of a pinion gear at the side of a motor, which is a driving unit of optical aperture mechanism, is designed to be a two-gears composition of a gear portion abutting on one side surface of the channel of the pinion gear, and... | 09/21/2010 |
| 7789518 | Imaging system and projection apparatus having light beam modulation module An imaging system suitable for projecting an image beam provided by a light valve unto a screen is provided. The imaging system includes a projection lens and a light beam modulation module. The projection lens is disposed on an optical path of the image beam, so as... | 09/07/2010 |
| 7784950 | Image projecting apparatus having variable stop An image projecting apparatus has an integrator for generating plural secondary-light-source images for generating illumination light with a uniform intensity; and a variable stop mechanism arranged at or near a position conjugate with the secondary-light-source ima... | 08/31/2010 |
| 7753536 | Dynamic aperture and projection device having same A dynamic aperture, positioned in the path of light, includes a pair of parallel blades, a connecting member, a driving member, and a motor. The projection device includes a light source configured for generating light. The connecting member is fixed to the projecti... | 07/13/2010 |
| 7753535 | Projection type image display apparatus According to the present invention, a projection type image display apparatus enables control of a large amount of light masking through a light-masking unit while maintaining a uniform illumination distribution in an area to be illuminated by the illumination light... | 07/13/2010 |
| 7748854 | Image display device A light-quantity adjusting function of a diaphragm used for light quantity control for improving the contrast of a projected image is controlled to cancel light quantity variation due to variation of the driving power of the light source for increasing the service l... | 07/06/2010 |
| 7748855 | Image projection apparatus A projector includes a plane mirror that is disposed at one end side of an end portion of a screen and a projection optical system that is disposed at a position that is separated from a reflection surface side of the plane mirror. A light shielding plate is provide... | 07/06/2010 |
| 7748853 | Lighting device and projector A lighting device used for an image display device including a light modulator that modulates light emitted from a light source device includes: a diffractive optical element on which the light emitted from the light source device is made incident and that generates... | 07/06/2010 |
| 7726819 | Structure for protecting a rod integrator having a light shield plate with an opening A structure for protecting a rod integrator that is used for a projection display apparatus is provided. The structure has: a protecting tube for the rod integrator, the protecting tube accommodating the rod integrator therein, wherein the protecting tube has openin... | 06/01/2010 |
| 7717572 | Adjusting device for an integration rod in a projection apparatus An adjusting device for positioning an integration rod within an optical engine module is provided. The optical engine module includes a casing having four sidewalls defining an optical path. The integration rod is disposed in the optical path. Each sidewall has a s... | 05/18/2010 |
| 7699475 | Deviating light retrieving optical projector system An optical projector system is provided. The optical projector system includes light source device, an optical system, a lens set, and a photoelectric conversion device. The optical system has a light entrance end corresponding to the light source device and a light... | 04/20/2010 |
| 7677740 | Optical diaphragm and projector An optical diaphragm for adjusting a light quantity of an incident light beam includes: a plurality of light-shielding vanes attached to a circumferential portion of an aperture of a base plate in a manner rotatable along a plane orthogonal to an optical axis of the... | 03/16/2010 |
| 7654676 | 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 the exit pupil of the image source underfills the entrance pupil of the... | 02/02/2010 |
| 7641347 | Multilayer control of gobo shape A control of gobos defend by records in the gobo. The gobos are formed by menued shapes. ... | 01/05/2010 |
| 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 illumination and projection paths to filter scattered light and/or lig... | 11/03/2009 |
| 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 an opening 75 in the movable aperture 70 is formed... | 10/27/2009 |
| 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 perform correction on the image signal applied to the spatial light modul... | 07/28/2009 |
| 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 partial optics, the projection optics have an optical axis. Each opt... | 04/14/2009 |
| 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 a plurality of angles, up to 360° horizontally. By utilizing at leas... | 02/10/2009 |
| 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 variable aperture iris and a control circuit for controlling opening/closing... | 01/06/2009 |
| 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. ... | 11/18/2008 |
| 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 illuminates substantially the entire active area of a pixelated optic... | 10/21/2008 |
| 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 display device without loss of higher-order modes of diffracted ligh... | 10/07/2008 |
| 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. ... | 08/19/2008 |
| 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 from the light source to a certain image, a driving part controlling th... | 08/19/2008 |
| 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 the exit pupil of the image source underfills the entrance pupil of the... | 07/15/2008 |
| 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 reflection mirror is fabricated by forming a plurality of ribs at a section of... | 07/15/2008 |
| 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 brightness in a region where the intensity of the reflected light reflected b... | 07/08/2008 |
