Patents by Inventor Takaaki Iwaki
Takaaki Iwaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7554729Abstract: A rear projection display apparatus is provided which includes a transmission type screen installed on the front face of an apparatus main body, and a video projector disposed inside the apparatus main body and projecting video on the transmission type screen from the rear side thereof. The transmission type screen includes a lens sheet having respective ribs attached to upper and lower sides thereof, the ribs having increased thickness, and an upper bracket and a lower bracket attached to the lens sheet so as to retainably embrace the respective associated ribs. The upper bracket is fixed to a frame on an apparatus main body side, whereby the lens sheet is installed so as to be pulled downward by the weight of the lower bracket. The rib is formed by laminating the same materials as a substrate of the lens sheet.Type: GrantFiled: February 16, 2007Date of Patent: June 30, 2009Assignee: Sony CorporationInventors: Takao Sumida, Takaaki Iwaki
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Patent number: 7535637Abstract: A rear projection type display apparatus is disclosed wherein image light reflected upon entrance thereof into a Fresnel lens sheet of the reflection type provided on a transmission type screen is suppressed from making stray light. A Fresnel lens sheet for converting incident light incoming at an incident angle within a predetermined angular range into parallel light includes a plurality of prisms arrayed on the light entrance face of a substrate. Each prism has a refracting face for refracting the incident light and a reflecting face for reflecting the refracted light from the refracting face toward the emergence face of the substrate. At least some of the prisms are configured such that the angle of a perpendicular to the refracting face with respect to a perpendicular to the emergence face is smaller than the incident angle at the position of the prism.Type: GrantFiled: November 1, 2005Date of Patent: May 19, 2009Assignee: Sony CorporationInventors: Yasufumi Ogawa, Takaaki Iwaki, Hiroaki Uchino
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Patent number: 7525728Abstract: A transmissive screen includes a first board member on a light source side, the first board member including a Fresnel lens on the surface of the light source side and one of a vertical lenticular lens or a horizontal lenticular lens on the surface of a viewer side; and a second board member on the viewer side, the second board member including the other of the vertical lenticular lens or the horizontal lenticular lens. The first board member includes a diffusing layer between the Fresnel lens and the lenticular lens on the surface of the viewer side at a position close to the Fresnel lens, wherein a relation represented by ??tan?1(fp/2L) is obtained, where ? is a diffusion angle at which a distribution characteristic of diffused light passing through the diffusing layer is half the peak gain, fp is a pitch of the Fresnel lens and L is a light path between the diffusing layer and the lenticular lens on the surface of the viewer side.Type: GrantFiled: October 18, 2006Date of Patent: April 28, 2009Assignee: Sony CorporationInventors: Yasufumi Ogawa, Takaaki Iwaki, Hiroaki Uchino, Minoru Makida
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Patent number: 7499213Abstract: A rear projection display apparatus includes a transmission type screen, a video projector, a lens sheet, a plurality of pull portions, and a pulling device. The transmission type screen is installed on a front face of an apparatus main body. The video projector is disposed inside the apparatus main body for projecting a video on the transmission type screen from a rear side. The plurality of pull portions are provided along horizontal and vertical sides of the lens sheet and are pulled by a pulling device which extends along a perimeter of the lens sheet.Type: GrantFiled: March 6, 2007Date of Patent: March 3, 2009Assignee: Sony CorporationInventors: Hiroaki Uchino, Takaaki Iwaki, Yasufumi Ogawa
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Patent number: 7460299Abstract: In a rear projection display apparatus including a transmission type screen installed on the front face of an apparatus main body, and a video projector disposed inside the apparatus main body and projecting video on the transmission type screen from the rear side thereof, the transmission type screen includes a lens sheet and is configured such that a plurality of pull portions provided along horizontal and longitudinal sides of the lens sheet are pulled upward and downward, and leftward and rightward, respectively, by a pulling device provided to extend along the circumference of the lens sheet.Type: GrantFiled: March 6, 2007Date of Patent: December 2, 2008Assignee: Sony CorporationInventors: Yasufumi Ogawa, Takaaki Iwaki, Yoshihiro Hagiwara
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Patent number: 7379240Abstract: A rear projection-type screen includes two sheet-like members having lenses prevented from being deformed and scratched. In the rear projection-type screen (5) for passing and focusing image light L emitted from an image light source (3), two sheet-like members (a lenticular lens sheet 7 and a Fresnel lens sheet 8) each made of a transparent material and having minute lenses (9) and (11) formed on at least one surface thereof are disposed such that their surfaces (7b) and (8a) with the lenses formed thereon confront each other, and a plurality of spacers (14), (14), . . . are disposed at appropriate spaced intervals between the confronting lenses of the two sheet-like members within an effective screen area (5a) for passing and focusing the image light thereon.Type: GrantFiled: July 15, 2003Date of Patent: May 27, 2008Assignee: Sony CorporationInventors: Takaaki Iwaki, Kyoichi Murakami
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Publication number: 20080102230Abstract: A transmissive screen includes a diffusing plate 7 having two first diffusing layers 13 and 15, to which diffusing particles are added respectively, arranged with a second diffusing layer 14, to which diffusing particles whose particle size is smaller than that of the first diffusing layers 13 and 15 are added, in between. Accordingly, even in the case where a diameter of a projection pupil of a projection lens that projects light onto the transmissive screen is small, an image glaring when displaying a bright image can be controlled, while minimizing deterioration of gain, resolution and uniformity.Type: ApplicationFiled: June 13, 2006Publication date: May 1, 2008Inventors: Satoru Murata, Takaaki Iwaki, Yasuaki Nakanishi, Toshiya Kono, Yukio Kokuzawa, Katsuyuki Murai
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Publication number: 20070236791Abstract: Disclosed herein is a rear projection display apparatus, including: an apparatus body; a transmission type screen disposed on the front face of the apparatus body; and an image projection apparatus disposed in the inside of the apparatus body and configured to project an image to the transmission type screen from the rear side of the transmission type screen. In the apparatus, the transmission type screen having a three-element configuration including a horizontal lenticular screen, a vertical lenticular screen and a Fresnel screen or a two-element configuration including a horizontal lenticular screen or a fly-eye screen and a Fresnel screen; the Fresnel screen including a substrate made of a glass material and one or a plurality of ones of a lens, an antiglare layer and an internal diffusion layer formed directly on the substrate but provided not by lamination.Type: ApplicationFiled: April 5, 2007Publication date: October 11, 2007Inventors: Minoru Makida, Takaaki Iwaki, Yasufumi Ogawa
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Publication number: 20070222951Abstract: A rear projection display device includes: a housing; a transmission screen provided on the front surface of the housing; and a video projector installed in the housing configured to project a video image to the transmission screen from the rear side. The transmission screen includes a frame, a quadrilateral lens sheet mounted to the frame, a rod-shaped pressure member arranged along at least one of the two opposite sides of the lens sheet, and an elastic section configured to apply a pressure to the pressure member to press the pressure member on the sheet surface, providing a tension. The lens sheet includes a main sheet to which the video image is projected, and a subsheet continuously joined to an end portion of the main sheet, the subsheet having a flexural rigidity smaller than that of the main sheet, the pressure member being pressed on the sheet surface.Type: ApplicationFiled: March 15, 2007Publication date: September 27, 2007Inventors: Minoru Makida, Takaaki Iwaki
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Publication number: 20070216875Abstract: A rear projection display apparatus includes a transmission type screen and a video projector. The transmission type screen is installed on the front face of an apparatus main body. The video projector is disposed inside the apparatus main body and projecting video on the transmission type screen from the rear side. The transmission type screen includes a quadrangular lens sheet and is configured such that a plurality of pull portions provided along horizontal and longitudinal sides of the lens sheet are pulled upward and downward, and leftward and rightward, respectively, by a pulling device provided to extend along the circumference of the lens sheet and the number of the pull portions on the horizontal sides of the lens sheet and the number of the pull portions on the vertical sides of the lens sheet are set so as to correspond to a ratio of a horizontal side length to a vertical side length of the lens sheet.Type: ApplicationFiled: March 6, 2007Publication date: September 20, 2007Inventors: Hiroaki Uchino, Takaaki Iwaki, Yasufumi Ogawa
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Publication number: 20070211222Abstract: In a rear projection display apparatus including a transmission type screen installed on the front face of an apparatus main body, and a video projector disposed inside the apparatus main body and projecting video on the transmission type screen from the rear side thereof, the transmission type screen includes a lens sheet and is configured such that a plurality of pull portions provided along horizontal and longitudinal sides of the lens sheet are pulled upward and downward, and leftward and rightward, respectively, by a pulling device provided to extend along the circumference of the lens sheet.Type: ApplicationFiled: March 6, 2007Publication date: September 13, 2007Inventors: Yasufumi Ogawa, Takaaki Iwaki, Yoshihiro Hagiwara
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Publication number: 20070206161Abstract: A rear projection display apparatus is provided which includes a transmission type screen installed on the front face of an apparatus main body, and a video projector disposed inside the apparatus main body and projecting video on the transmission type screen from the rear side thereof. The transmission type screen includes a lens sheet having respective ribs attached to upper and lower sides thereof, the ribs having increased thickness, and an upper bracket and a lower bracket attached to the lens sheet so as to retainably embrace the respective associated ribs. The upper bracket is fixed to a frame on an apparatus main body side, whereby the lens sheet is installed so as to be pulled downward by the weight of the lower bracket. The rib is formed by laminating the same materials as a substrate of the lens sheet.Type: ApplicationFiled: February 16, 2007Publication date: September 6, 2007Inventors: Takao Sumida, Takaaki Iwaki
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Publication number: 20070121208Abstract: A transmissive screen includes a first board member on a light source side, the first board member including a Fresnel lens on the surface of the light source side and one of a vertical lenticular lens or a horizontal lenticular lens on the surface of a viewer side; and a second board member on the viewer side, the second board member including the other of the vertical lenticular lens or the horizontal lenticular lens. The first board member includes a diffusing layer between the Fresnel lens and the lenticular lens on the surface of the viewer side at a position close to the Fresnel lens, wherein a relation represented by ??tan?1(fp/2L) is obtained, where ? is a diffusion angle at which a distribution characteristic of diffused light passing through the diffusing layer is half the peak gain, fp is a pitch of the Fresnel lens and L is a light path between the diffusing layer and the lenticular lens on the surface of the viewer side.Type: ApplicationFiled: October 18, 2006Publication date: May 31, 2007Applicant: Sony CorporationInventors: Yasufumi Ogawa, Takaaki Iwaki, Hiroaki Uchino, Minoru Makida
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Patent number: 7116498Abstract: A projection optical system and an image projection apparatus that are small in size and can achieve projection with a wide angle while a good image forming performance is assured includes a first lens group having a negative refracting power and a second lens group also having a negative refracting power. The first and second lens groups are arranged in order from the projection side. The first lens group includes a negative meniscus lens that has a concave surface directed to the projection side and formed as an aspherical reflecting surface.Type: GrantFiled: March 7, 2005Date of Patent: October 3, 2006Assignee: Sony CorporationInventors: Jun Nishikawa, Nobuhiko Nishiki, Yasunori Kuratomi, Tetsuya Kita, Takaaki Iwaki
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Publication number: 20060132911Abstract: In a transmission type screen structured to have at least two layers, namely, a first layer having a lenticular lens and having black stripes on the viewer's side relative to the lenticular lens and a second layer adjacent to the first layer, which are disposed sequentially as viewed from the viewer's side, the focal distance of the lenticular lens of the first layer is so set that external light having been skewly incident from the viewer's side and having passed through the gaps between the black stripes of the first layer is reflected on the lens surface of the lenticular lens of the first layer to impinge on the black stripes, whereby the “waviness” due to the light reflected by the second layer can be suppressed more effectively.Type: ApplicationFiled: December 15, 2005Publication date: June 22, 2006Applicant: Sony CorporationInventors: Yasufumi Ogawa, Takaaki Iwaki, Hiroaki Uchino, Satoru Murata, Minoru Makida
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Publication number: 20060126172Abstract: A rear projection-type screen includes two sheet-like members having lenses prevented from being deformed and scratched. In the rear projection-type screen (5) for passing and focusing image light L emitted from an image light source (3), two sheet-like members (a lenticular lens sheet 7 and a Fresnel lens sheet 8) each made of a transparent material and having minute lenses (9) and (11) formed on at least one surface thereof are disposed such that their surfaces (7b) and (8a) with the lenses formed thereon confront each other, and a plurality of spacers (14), (14), . . . are disposed at appropriate spaced intervals between the confronting lenses of the two sheet-like members within an effective screen area (5a) for passing and focusing the image light thereon.Type: ApplicationFiled: July 15, 2003Publication date: June 15, 2006Inventors: Takaaki Iwaki, Kyoichi Murakami
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Publication number: 20060109569Abstract: A rear projection type display apparatus is disclosed wherein image light reflected upon entrance thereof into a Fresnel lens sheet of the reflection type provided on a transmission type screen is suppressed from making stray light. A Fresnel lens sheet for converting incident light incoming at an incident angle within a predetermined angular range into parallel light includes a plurality of prisms arrayed on the light entrance face of a substrate. Each prism has a refracting face for refracting the incident light and a reflecting face for reflecting the refracted light from the refracting face toward the emergence face of the substrate. At least some of the prisms are configured such that the angle of a perpendicular to the refracting face with respect to a perpendicular to the emergence face is smaller than the incident angle at the position of the prism.Type: ApplicationFiled: November 1, 2005Publication date: May 25, 2006Inventors: Yasufumi Ogawa, Takaaki Iwaki, Hiroaki Uchino
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Publication number: 20050200974Abstract: A projection optical system and an image projection apparatus that are small in size and can achieve projection with a wide angle while a good image forming performance is assured includes a first lens group having a negative refracting power and a second lens group also having a negative refracting power. The first and second lens groups are arranged in order from the projection side. The first lens group includes a negative meniscus lens that has a concave surface directed to the projection side and formed as an aspherical reflecting surface.Type: ApplicationFiled: March 7, 2005Publication date: September 15, 2005Inventors: Jun Nishikawa, Nobuhiko Nishiki, Yasunori Kuratomi, Tetsuya Kita, Takaaki Iwaki
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Patent number: 6614594Abstract: A projection panel assembly is mounted on a casing for holding a screen so as to mount a front panel on the viewing side of the screen. The projection panel assembly includes a fixing portion for directly fixing the front panel and a supporting portion for movably supporting the front panel via the fixing portion. This makes it possible to absorb any distortion of the front panel due to thermal expansion and contraction.Type: GrantFiled: July 16, 2001Date of Patent: September 2, 2003Assignee: Sony CorporationInventors: Hiroshi Murasugi, Takaaki Iwaki, Satoru Murata
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Publication number: 20020005985Abstract: A projection panel assembly is mounted on a casing for holding a screen so as to mount a front panel on the viewing side of the screen. The projection panel assembly includes a fixing portion for directly fixing the front panel, and a supporting portion for movably supporting the front panel via the fixing portion. This makes it possible to absorb the distortion of the front panel or the like due to expansion and contraction.Type: ApplicationFiled: July 16, 2001Publication date: January 17, 2002Inventors: Hiroshi Murasugi, Takaaki Iwaki, Satoru Murata