| Patent Number |
Title Of Patent |
Date Issued |
| 7440186 |
Screen, a fresnel lens sheet used for the screen, and an image display apparatus using the scree |
October 21, 2008 |
| The present invention provides a technology suitable for shortening a depth of a image display apparatus while obtaining a picture of high quality. According to the invention, a total reflection prism portion is provided on a side of a Fresnel lens sheet toward a picture source. The |
| 7436593 |
Screen, fresnel lens sheet used therefor, and image display apparatus using the same |
October 14, 2008 |
| Images that are bright even on the periphery of a transmissive screen are obtained by reducing reflection loss of the screen when the screen incident angle of the image light entering the upper left and right ends of the screen increases. Incident-side prisms (10), each having at least |
| 7433121 |
Projection type image display apparatus |
October 7, 2008 |
| A screen is hung from a screen frame with hanging members bonded to the upper side of a front sheet. Supporting members are disposed on the lower side of the front sheet and, by mounting a Fresnel lens sheet on the supporting members, a tension is given by its weight to the front sheet |
| 7432538 |
Field-effect transistor |
October 7, 2008 |
| A field-effect transistor includes a channel layer having a channel and a carrier supply layer, disposed on the channel layer, containing a semiconductor represented by the formula Al.sub.xGa.sub.1-xN, wherein x is greater than 0.04 and less than 0.45. The channel is formed near the |
| 7404646 |
Projection lens apparatus and rear projection type image display apparatus |
July 29, 2008 |
| A projection lens apparatus includes a plurality of lenses, for enlarging and projecting, onto a screen, an original image displayed on an image generation source. The plurality of lenses are arranged, beginning with the lens nearest the screen, as first to sixth lens groups. The fourth |
| 7403335 |
Screen, Fresnel lens sheet used for the same, and image display apparatus using the same |
July 22, 2008 |
| The present invention provides a screen suitable for reducing the longitudinal dimension of a set. The present invention includes two prism sections. One is a totally reflective prism section (10) provided at the image generation source side of a Fresnel lens sheet (6). The other is a |
| 7365907 |
Rear projection image display apparatus |
April 29, 2008 |
| A compact rear projection image display apparatus in which the projection distance in a projection optical system is substantially reduced and no reflection mirror is used, thereby eliminating a major cause of image trapezoidal distortion. The rear projection image display apparatus has |
| 7362503 |
Screen, Fresnel lens sheet used for the same, and image display apparatus using the same |
April 22, 2008 |
| The present invention provides a technology that makes it possible to display high-quality images by reducing a reflection loss of the image light entering the upper left and right ends of a transmissive screen. At the image generation source side of the Fresnel lens sheet, a totally |
| 7357537 |
Light source for projector and projection type image display apparatus using thereof |
April 15, 2008 |
| Provided is a projector light source which can effectively project a light beam having a sufficient volume from a lamp as a light source, and which is highly accurate and is excellent in workability. The projector light source comprising an arc tube for emitting a light beam; and a conca |
| 7347566 |
Projection lens unit and rear projection type image display system |
March 25, 2008 |
| An inexpensive projection lens unit in a rear projection type image display system, having a short focal distance (wide angle of viewing field), high focus and high contrast, and as well, including a power lens made of a glass material having a high refractive index in a range from 1 |
| 7342724 |
Rear projection type image display device |
March 11, 2008 |
| The present invention relates to a rear projection type image display device comprising projection lenses (2, 3) for projecting an image displayed on an image display element onto a transmission type screen (6) on a larger scale, an optical path turn-back mirror (7) for turning back |
| 7316487 |
Projector light source and projection type image display device using the same |
January 8, 2008 |
| A projector light source which facilitates molding of a reflector for obtaining a complicated reflecting surface and provides an improved cooling efficiency, which is characterized by molding the reflector of the light source using heat resistant plastic mixed with a high heat conduc |
| 7316482 |
Reflecting mirror and projection image display apparatus using the same |
January 8, 2008 |
| The present invention is directed to the provision of a reflecting mirror that suppresses decreases in the resolution performance and contrast performance by decreasing the mean surface roughness. In a projection type image display apparatus including a projector lens that expansion |
| 7274157 |
Lamp operation controller and controlling method of lamp operation |
September 25, 2007 |
| In a lamp operation controller and a method thereof, for obtaining a stable light emission, simply and certainly, without necessity of detection of a parameter accompanying discharge, the lamp operation controller, for operating a discharge lamp having a pair of electrodes, which are |
| 7261421 |
Optical projector and image display apparatus using the same |
August 28, 2007 |
| Image disturbance called speckle noise occurs when an image generator has a small effective screen size and a projection lens has a small effective diameter. The present invention is intended to reduce speckle noise. In an optical projector, a viewing angle enlarging ember (60) for enlar |
| 7261420 |
Projection optical unit and projection image display apparatus |
August 28, 2007 |
| A projection optical unit for enlarged projection of an image displayed by an image display element includes a first projection optical unit having positive refractive power, and a second projection optical unit having positive refractive power for further enlarging the first enlarged im |
| 7255444 |
Optical unit and projection-type image display apparatus using the same |
August 14, 2007 |
| A technique according to the present invention allows a projection-type image display system to suppress the temperature rise of the polarization split devices and secure high image quality. Polarization split means has a polarization split device arranged in a medium with a refractive i |
| 7245429 |
Image display device, rear projection type screen used in image display device, Fresnel lens she |
July 17, 2007 |
| A total reflecting prism portion is formed on an image generation source side of a Fresnel lens sheet which constitutes a rear projection type screen. The total reflecting prism portion is formed in an area in which the angle of incidence of a projection image projected from an optical |
| 7244030 |
Rear projection type image display device |
July 17, 2007 |
| The present invention relates to a rear projection type image display device comprising projection lenses (2, 3) for projecting an image displayed on an image display element onto a transmission type screen (6) on a larger scale, an optical path turn-back mirror (7) for turning back |
| 7241015 |
Optical unit and projection type image display unit using it |
July 10, 2007 |
| An optical unit includes a light source, a color separator, reflection-type image display elements, a color synthesizer, a reflection-type polarization plate, and an optical chassis. The optical chassis holds the reflection-type polarization plate and the reflection-type image displa |
| 7237901 |
Projection type image display device, rear projection type image display device, optical unit, a |
July 3, 2007 |
| The present invention provides a projection type image display device capable of affording a bright display of a high saturation and capable of ensuring a high reliability of optical parts. The projection type image display device is provided with a color synthesizer for color-synthe |
| 7221507 |
Projection-type picture display apparatus and screen used thereby |
May 22, 2007 |
| A screen for use in a projection-type image display apparatus having an image displaying element which includes a plurality of pixels for modulating light from a light source so as to form an enlarged picture on the screen. The screen includes a Fresnel lens sheet having Fresnel lens |
| 7212339 |
Transmissive screen and rear projection type image display apparatus using same |
May 1, 2007 |
| A purpose of the present invention is to provide a simple configuration for bonding a lenticular lens sheet, a front sheet, and light diffusion layers together to reduce cost. To accomplish the above purpose, the present invention comprises: a lenticular lens sheet (20); a front sheet |
| 7210797 |
Projector optical unit, projection type image display apparatus, and rear projection type image |
May 1, 2007 |
| In a projection type image display apparatus, a projector optical unit for projecting an image onto a screen while magnifying a size of the image to be projected with respect to an original size of the image displayed by an image forming element, has a group of lenses for magnifying the |
| 7198390 |
Reflector, projective display and projector |
April 3, 2007 |
| It is an object of the present invention to provide a reflector made of heat-resistant glass. It is another object of the present invention to provide a projective display which uses the reflector.A projector device having: a light source emitting white light; a reflector reflecting a |
| 7195358 |
Rear projection type image display device |
March 27, 2007 |
| The present invention relates to a rear projection type image display device comprising projection lenses (2, 3) for projecting an image displayed on an image display element onto a transmission type screen (6) on a larger scale, an optical path turn-back mirror (7) for turning back |
| 7172292 |
Projection lens unit and rear projection type image display system |
February 6, 2007 |
| An inexpensive projection lens unit in a rear projection type image display system, having a short focal distance (wide angle of viewing field), high focus and high contrast, and as well, including a power lens made of a glass material having a high refractive index in a range from 1 |
| 7170567 |
Projection type image display apparatus |
January 30, 2007 |
| A projection type image display apparatus includes a light source to emit light; a polarizing beam splitter to polarize the light received from the light source; a first lens array including a plurality of first lens cells having rectangular shapes to receive the light from the polarizin |
| 7159988 |
Projection optical unit and projection image display apparatus |
January 9, 2007 |
| A projection optical unit has two lens groups. A first projection optical unit disposed closest to an image display element, temporarily forms a first enlarged image (magnification: M1) at the image display element side, rather than at a second projection optical unit. The first enlarged |
| 7142367 |
Projection lens apparatus and projection type image display apparatus |
November 28, 2006 |
| A projection type image display apparatus having an image display element outputting an image ray, a projection lens apparatus for performing overhead projection of the image ray from the image display element, the projection lens apparatus having a plurality of lens elements, a refl |
| 7111942 |
Reflection-type image projection unit and a reflection-type image display apparatus, and a light |
September 26, 2006 |
| In a reflection-type image projecting unit, being applicable into a reflection-type image display apparatus, being superior in contrast and achieving small-sizing of the apparatus, together with a light source for use therein, a light flux including three (3) color components, R, G and |
| 7095558 |
Image display device, rear projection type screen used in image display device, Fresnel lens she |
August 22, 2006 |
| A total reflecting prism portion is formed on an image generation source side of a Fresnel lens sheet which constitutes a rear projection type screen. The total reflecting prism portion is formed in an area in which the angle of incidence of a projection image projected from an optical |
| 7081927 |
Optical projection apparatus, transmission type screen, and projection type image display appara |
July 25, 2006 |
| An optical projection apparatus includes an optical lighting system provided with a polarized beam splitter for polarizing white light flux from a white light source and combining the white light flux with other light fluxes, thereby taking out a predetermined polarized wave; a multi |
| 7059730 |
Back reflective mirror and back projection type video display device using the same |
June 13, 2006 |
| In the present invention, there is disclosed a reflective mirror whose contrast or resolution performance is equal to that of a surface mirror of a glass mirror for general use and which does not have any problem in reliability of resistance to environment and whose color shift or br |
| 7059725 |
Reflection-type image projection unit and a reflection-type image display apparatus, and a light |
June 13, 2006 |
| In a reflection-type image projecting unit, being applicable into a reflection-type image display apparatus, being superior in contrast and achieving small-sizing of the apparatus, together with a light source for use therein, a light flux including three (3) color components, R, G and |
| 7023616 |
Projection-type picture display apparatus and screen used thereby |
April 4, 2006 |
| A screen for allowing light generated by a light source and modulated by a picture display device having pixels laid out to form a matrix to produce an image thereon to be projected on the screen as an enlarged picture. The screen has a Fresnel lens sheet forming Fresnel lenses at an emi |
| 7014319 |
Projection type color display device |
March 21, 2006 |
| A projection type color display device capable of achieving both the color balance and higher luminous flux amount (high luminance) of enlarged on-screen images is disclosed. The device includes a white light source, light flux separating unit, image display elements, photosynthetic unit |
| 7009766 |
Transmissive screen and rear projection type image display apparatus using same |
March 7, 2006 |
| An purpose of the present invention is to provide a simple configuration for bonding a lenticular lens sheet, a front sheet, and light diffusion layers together to reduce cost.To accomplish the above purpose, the present invention comprises: a lenticular lens sheet (20); a front sheet |
| 6987546 |
Projection type image display apparatus |
January 17, 2006 |
| An image display technique which projects R, G, and B light rays on a display device to form an image with an increased utilization ratio of light and an increased screen brightness. R, G, and B light rays as a result of color separation are reflected by plural reflective surfaces on |
| 6975460 |
Projection lens apparatus and projection type image display apparatus |
December 13, 2005 |
| A projection type image display apparatus having an image display element outputting an image ray, a projection lens apparatus for performing overhead projection of the image ray from the image display element, the projection lens apparatus having a plurality of lens elements, a refl |
| 6956624 |
Optical projection apparatus, transmission type screen, and projection type image display appara |
October 18, 2005 |
| An optical projection apparatus includes an optical lighting system provided with a polarized beam splitter for polarizing a white light flux received from a white light source and combining the white light flux with other light fluxes, thereby taking out a predetermined polarized wave; |
| 6945651 |
Optical unit and projection type projector apparatus using the same |
September 20, 2005 |
| By making the beam polarization state in a cross prism having a dichroic function for an incident beam on a reflection type liquid crystal panel the same as that for a reflected ON beam, a small-sized, low cost projection type projector apparatus is provided. A Faraday rotator having |
| 6905213 |
Projection apparatus and projection-type image display apparatus |
June 14, 2005 |
| In an illumination optical system and a color combining optical system of a projection apparatus using three image display elements, the object of the present invention is to reduce misconvergence of enlarged images displayed on a screen. The present invention provides a projection appar |
| 6894729 |
Optical projection apparatus, transmission type screen, and projection type image display appara |
May 17, 2005 |
| An optical projection apparatus includes an optical lighting system provided with a polarized beam splitter for polarizing white light flux from a white light source and combining the white light flux with other light fluxes, thereby taking out a predetermined polarized wave; a multi |
| 6869184 |
Polarized-light converting unit and projector using the same |
March 22, 2005 |
| Disclosed is a polarized-light converting unit, which is excellent in contrast performance and realizes high reliability and an increase in its life, and a projector device using the converting unit. The polarized-light converting unit includes first and second polarizing beam splitt |
| 6863418 |
Light source for projector and projection type image display apparatus using thereof |
March 8, 2005 |
| Provided is a projector light source which can effectively project a light beam having a sufficient volume from a lamp as a light source, and which is highly accurate and is excellent in workability. The projector light source comprising an arc tube for emitting a light beam; and a conca |
| 6832836 |
Optical unit and projection type projector apparatus using the same |
December 21, 2004 |
| By making the beam polarization state in a cross prism having a dichroic function for an incident beam on a reflection type liquid crystal panel the same as that for a reflected ON beam, a small-sized, low cost projection type projector apparatus is provided. A Faraday rotator having |
| 6829031 |
Liquid crystal display apparatus and optical device for use therein |
December 7, 2004 |
| For obtaining both high brightness under condition of small-sized and simplified structure and suppression of increase in temperature of liquid crystal display elements and polarizing elements, in a liquid crystal display apparatus, comprising: a liquid crystal display element 2 for |
| 6801366 |
Projection lens system and projection image display apparatus using the same |
October 5, 2004 |
| When a projection lens system used for a rear projection type image display apparatus has a first lens group having an aspherical lens surface, a second lens group, a third lens group sharing almost all the positive refractive power of the overall system, a fourth lens group having an |
| 6783242 |
Projection apparatus and projection-type image display apparatus |
August 31, 2004 |
| A projection apparatus includes a polarizing converter which converts a light beam from a light source to a polarized beam; a color separator which separates the polarized beam into color beams based on wavelength; first through third optical path modifiers each of which modifies an |
