| Patent Number |
Title Of Patent |
Date Issued |
| RE40296 |
Projection type liquid crystal projector |
May 6, 2008 |
| A projector for separating white light into three primary colors, forming images with liquid crystal light valves, mixing these images, and projecting an enlarged picture of the mixed images with a projection lens. The projector includes an optical unit having a light source, a plura |
| RE39040 |
Projector |
March 28, 2006 |
| A projection-type display apparatus in accordance with the invention reduces the margin formed around the image forming range of the light valves, and forms a bright projected image. Emitted light from a light source lamp unit of a projection-type display apparatus illuminates liquid |
| RE38740 |
Dichroic prism and projection display apparatus |
June 7, 2005 |
| The invention provides a dichroic prism capable of reducing displacements of projection pixels of colors caused by chromatic aberration of magnification. A dichroic prism is formed in the shape of a quadrangular prism as a whole by joining four rectangular prisms together. A red refl |
| RE38225 |
Projection display and illuminating optical system for it |
August 19, 2003 |
| An apparatus which makes dark lines due to a central axis of a cross dichroic prism sufficiently inconspicuous. In a second lens array, minute lenses arranged on the same column include three different types of minute lenses having optical axes at different positions. Each row of the min |
| 7593076 |
Optical device and method for manufacturing optical device |
September 22, 2009 |
| An optical device includes a polarizer having a polarizing layer, a first light-transmissive substrate bonded on one surface of the polarizing layer of the polarizer, and a second light-transmissive substrate bonded on the other surface of the polarizing layer of the polarizer. The first |
| 7559675 |
Light source device and projector |
July 14, 2009 |
| A light source device, includes: a light source lamp that has a light emitting tube and a pair of electrodes, the light emitting tube including a discharge space; the pair of electrodes being disposed in the discharge space of the light emitting tube; a reflector in a substantially C-sha |
| 7551280 |
Method for manufacturing optical element, method for manufacturing projector, optical element an |
June 23, 2009 |
| A method for manufacturing an optical element in which a display quality of a projection image is improved is provided. The method is for manufacturing an optical element having a polarization plate of which one side a transmissive member is bonded. The method includes preparing a li |
| 7549771 |
Light source device and projector |
June 23, 2009 |
| A light source device includes: a light source lamp having a light-emitting tube with a discharge space and a pair of electrodes disposed in the discharge space of the light-emitting tube; a reflector extending in a substantially concave shape in section, the reflector reflecting a l |
| 7364311 |
Method of manufacturing reflective mirror, illumination device, and projector |
April 29, 2008 |
| A reflective mirror manufacturing method for manufacturing a reflective mirror used in an illumination device including an arc tube including a light-emitting portion and a reflective mirror including a reflective surface that reflects light from the light-emitting portion in a prede |
| 7357531 |
Light source device and projector |
April 15, 2008 |
| In a light source device (10), relations of .theta.1.ltoreq.Tan.sup.-1 (Hd/(2f1)) and T1<H.ltoreq.Hd are established, where a diameter of a circle defining an edge on the neck (121) side of a usable-light reflection area in a reflecting portion (122) of a main reflecting mirror (1 |
| 7159990 |
Method of manufacturing reflective mirror, illumination device, and projector |
January 9, 2007 |
| A reflective mirror manufacturing method for manufacturing a reflective mirror used in an illumination device including an arc tube including a light-emitting portion and a reflective mirror including a reflective surface that reflects light from the light-emitting portion in a prede |
| 7150543 |
Optical modulator holder, optical device, and projector |
December 19, 2006 |
| An optical modulator holder (4402) has an optical modulator holding unit (4405) having a substantially rectangular U-shaped cross-section and made of heat-conductive material, a plate-like member (4406) made of heat-conductive material, and an optical modulator cooling unit (4407) co |
| 7140733 |
Light source device and projector |
November 28, 2006 |
| The light source device 10A has a light-emitting tube (11) (radial light source) and a reflector (12A). A cylindrical heat-conductive member (14A) is attached on an outer surface of a first sealing portion (114A) near a neck portion (121A) of a reflector (12A) in sealing portions (114) o |
| 7085051 |
Polarizer and optical device using the polarizer |
August 1, 2006 |
| A polarizer for converting incident light beam into a linear polarization light beam has a base plate of a material of low linear expansion coefficient, high thermal conductivity or low photoelastic constant, a birefringent portion formed by arranging minute metal concave thread on a |
| 7085034 |
Optical device and projector |
August 1, 2006 |
| An optical device (44) includes three optical modulators, three optical modulator holders (447), a plurality of fluid circulating members (440), a cross dichroic prism (444), a fluid branching section (446), a fluid feed-in section (449) and a fluid pressurizing/feeding section (445). Th |
| 7036941 |
Illumination optical device and projector |
May 2, 2006 |
| An illumination optical device is provided with a light source device and a uniform illumination optical system. To a light flux emission side of an expanded portion of the light source lamp of the light source device, which is opposite to a reflector of the illumination optical device, |
| 7008180 |
Axial-flow fan and projector provided with the same |
March 7, 2006 |
| An axial-flow fan has a plurality of main fins (702), and auxiliary fins (703) provided between the main fins (702), where the position of a front end of the auxiliary fin (703) relative to X axis and the position of a front end of the main fin (702) adjoining the auxiliary fin in re |
| 6935753 |
Projector |
August 30, 2005 |
| This invention provides a technique of reducing temperature rise due to heat generation of polarization control elements. A projector includes: an illumination optical system; an electro-optical device for modulating light from the illumination optical system in response to image inf |
| 6935745 |
Optical device, method for manufacturing optical device, and projector |
August 30, 2005 |
| The present invention provides an optical device that achieves reduction in size, reduction in manufacturing costs, improved image quality, and so forth, by simplification and the like of a panel in prisms (POP) structure wherein light-modulating devices and a color synthesizing optical |
| 6854848 |
Optical device and projector |
February 15, 2005 |
| The invention provides a structure to attach a liquid crystal panel to a prism, which enables further enhancements in cooling capabilities. The structure includes a storing member fixed on a base and holding a holding frame, where a liquid crystal panel is held. Erected pieces to form a |
| 6843277 |
Duct and electronic apparatus having the duct |
January 18, 2005 |
| The invention provides a duct with high sound absorbing effect and sufficient exhausting efficiency, as well as an electronic apparatus having the duct. The duct can include a hollow duct body, an inflated section arranged at an intermediate part of a passage of the duct body, and a |
| 6833953 |
Polarizer and optical device using the polarizer |
December 21, 2004 |
| A polarizer for converting incident light beam into a linear polarization light beam has a base plate of a material of low linear expansion coefficient, high thermal conductivity or low photoelastic constant, a birefringent portion formed by arranging minute metal concave tread on a |
| 6811262 |
Projector comprising an optical component having a rock crystal member |
November 2, 2004 |
| The present invention provides a technique of readily manufacturing a projector. The projector comprises: an illumination optical system for emitting light; an electro-optical device for modulating the light emitted from the illumination optical system in response to image information; a |
| 6805444 |
Projector comprising an optical component having a rock crystal member |
October 19, 2004 |
| The projector comprises: an illumination optical system for emitting light; an electro-optical device for modulating the light emitted from the illumination optical system in response to image information; a projection optical system for projecting a modulated light generated by the |
| 6778341 |
Method for manufacturing light-selective prism |
August 17, 2004 |
| The present invention provides a technique for improving the optical characteristics of a light-selective prism. By cutting a block along a plane perpendicular to a first direction, a plurality of first small blocks are obtained. A first selective film is formed on the cut face of th |
| 6690521 |
Light-selective prism, projection display apparatus using the same, and method of manufacturing |
February 10, 2004 |
| A red-reflecting film and a blue-reflecting film are formed in a substantially X shape on joint surfaces defined by the respective side faces of four columnar prisms or right-angle prisms. The red-reflecting film is continuously formed without separating at an intersection of the two |
| 6633435 |
Illumination optical system and projector comprising the same |
October 14, 2003 |
| The illumination optical system includes a lens array having a plurality of lenses for splitting the light emitted from a light source into a plurality of sub-beams, at least some lenses of the lens array being decentered. The thickness of each of the lenses constituting the lens arr |
| 6523958 |
Optical component and projector using the same |
February 25, 2003 |
| A technology is provided which makes it possible to easily produce an optical component without considerably deteriorating the optical characteristics of the optical component. The optical component includes a glass substrate, an optical member which is connected to the glass substra |
| 6411449 |
Light-selective prism, projection display apparatus using the same, and method of manufacturing |
June 25, 2002 |
| A red-reflecting film and a blue-reflecting film are formed in a substantially X shape on joint surfaces defined by the respective side faces of four columnar prisms or right-angle prisms. The red-reflecting film is continuously formed without separating at an intersection of the two |
| 6375328 |
Optical modulation element and projector |
April 23, 2002 |
| Liquid crystal modulation elements are arranged so that light outgoing surfaces thereof face light incident surfaces of a color synthesizing prism. Transparent plates are bonded to the light outgoing surfaces of the liquid crystal modulation elements. For this reason, adhesion of dust to |
| 6342971 |
Projector using a light-selective prism |
January 29, 2002 |
| A red-reflecting film and a blue-reflecting film are formed in a substantially X shape on joint surfaces defined by the respective side faces of four columnar prisms or right-angle prisms. The red-reflecting film is continuously formed without separating at an intersection of the two |
| 6273569 |
Illuminating optical system and projector |
August 14, 2001 |
| The invention concerns improving the efficiency with which light being used in a polarization conversion optical system used in an illuminating optical system. An illuminating optical system includes a light source for emitting unpolarized light, a separation optical system for separatin |
| 6172815 |
Dichroic prism and projection display apparatus |
January 9, 2001 |
| The invention provides a dichroic prism capable of reducing displacements of projection pixels of colors caused by chromatic aberration of magnification. A dichroic prism is formed in the shape of a quadrangular prism as a whole by joining four rectangular prisms together. A red refl |
| 6155686 |
Projection display device |
December 5, 2000 |
| To provide a projection display device which can easily produce a high contrast, bright projection image, without obliquely mounting the light source. In a projection display device, a condenser lens is disposed such that its optical axis is disposed at a location parallel to an optical |
| 6092901 |
Polarizing illumination device and projection display device |
July 25, 2000 |
| A polarizing illumination device and a projection display device using the polarizing illumination device improve light utilization efficiency. Polarizing conversion elements are placed so that one of polarizing separation films of a first polarizing conversion element and one of pol |
| 6072635 |
Dichroic prism and projection display apparatus |
June 6, 2000 |
| The invention provides a dichroic prism capable of reducing displacements of projection pixels of colors caused by chromatic aberration of magnification. A dichroic prism is formed in the shape of a quadrangular prism as a whole by joining four rectangular prisms together. A red refl |
