Patents by Inventor Shuji Aruga
Shuji Aruga 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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Publication number: 20110205481Abstract: A pixel circuit that is connected with a scanning line and a data line includes a first transistor of which a gate electrode is connected with the scanning line and one of a source electrode and a drain electrode is connected with the data line, a second transistor of which a gate electrode is connected with the scanning line, one of a source electrode and a drain electrode is connected with the first transistor, and the other one of the source electrode and the drain electrode is connected with a first node, an auxiliary capacitor connected with a node at which the first transistor and the second transistor are connected to each other, a pixel electrode connected with the first node, a counter electrode opposed to the pixel electrode, liquid crystal held between the pixel electrode and the counter electrode, and a holding capacitor connected with the first node.Type: ApplicationFiled: February 16, 2011Publication date: August 25, 2011Applicant: SONY CORPORATIONInventors: Shuji Aruga, Norio Koma, Koji Hirosawa
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Publication number: 20100045903Abstract: A liquid crystal device includes a plurality of pixels. Each of the plurality of pixels includes a liquid crystal layer interposed between first and second substrates facing each other and having liquid crystal molecules to be driven by an applied electric field, a first electrode formed on a side of the first substrate facing the second substrate, and a second electrode formed on a side of the first substrate facing the second substrate and interposing an insulating layer together with the first electrode. A reflective display area for reflective display and a transmissive display area for transmissive display are formed within each of the pixels. The liquid crystal molecules have a negative dielectric anisotropy.Type: ApplicationFiled: August 6, 2009Publication date: February 25, 2010Applicant: Seiko Epson CorporationInventors: Shuji ARUGA, Norio KOMA
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Patent number: 6005644Abstract: A projection display for preventing reflected light beams produced during optical modulation or light compositing from reinjecting into the modulating liquid crystal panel, as well as to convert projected light or light impinged into a light compositing system into a linearly polarized light beam, thereby projecting high-contrast, high-intensity images with minimal reflection errors.Type: GrantFiled: March 5, 1996Date of Patent: December 21, 1999Assignee: Seiko Epson CorporationInventors: Shuji Aruga, Hirosada Horiguchi
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Patent number: 5241407Abstract: A projection-type display device having a single light source which produces light. A first dichroic mirror group receives the light and separates it into colored light. A transmissive light valve system modulates the colored light and a second dichroic mirror group synthesizes the modulated colored light. A projection system projects the synthesized colored light onto a screen.Type: GrantFiled: February 8, 1991Date of Patent: August 31, 1993Assignee: Seiko Epson CorporationInventors: Tomio Sonehara, Shuji Aruga, Shinji Morozumi
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Patent number: 5075798Abstract: A projection-type display device having a single light source which produces light. A first dichroic mirror group receives the light and separates it into colored light. A transmissive light valve system modulates the colored light and a second dichroic mirror group synthesizaes the modulated colored light. A projection system projects the synthesized colored light onto a screen.Type: GrantFiled: October 19, 1989Date of Patent: December 24, 1991Assignee: Seiko Epson CorporationInventors: Tomio Sonehara, Shuji Aruga, Shinji Morozumi
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Patent number: 5073013Abstract: A projection-type display device having a single light source which produces light. A first dichroic mirror group receives the light and separates it into colored light. A transmissive light valve system modulates the colored light and a second dichoric mirror group synthesizes the modulated colored light. A projection system projects the synthesized colored light onto a screen.Type: GrantFiled: October 19, 1989Date of Patent: December 17, 1991Assignee: Seiko Epson CorporationInventors: Tomio Sonehara, Shuji Aruga, Shinji Morozumi
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Patent number: 4995702Abstract: A projection-type display device using twisted nematic liquid crystal light valves in which the photoelectric transfer characteristics of three light valves for selectively transmitting red, green and blue light to a synthesizing device are matched. The product of the birefrigence .DELTA.n and thickness d of the twisted nematic liquid crystal and thickness of cell is selected to fall within a predetermined optimal range of values depending upon the wavelength of light which travels therethrough. The thickness d or birefrigence .DELTA.n of the twisted nematic liquid crystal material of each light valve may be the same.Type: GrantFiled: October 30, 1987Date of Patent: February 26, 1991Assignee: Seiko Epson CorporationInventor: Shuji Aruga
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Patent number: 4904061Abstract: A projection-type display device for producing a faithful colored synthesized image based on equating the luminous intensity distributions and light patterns produced by three twisted nematic liquid crystal light valves for three primary color images. Each light valve includes a twisted nematic liquid crystal composition which is twisted to the right or left depending on the number of times that color light is reflected. Each light valve may include an active switching matrix arranged in mirror-like symmetry with light shield layers also arranged symmetrically.Type: GrantFiled: April 14, 1989Date of Patent: February 27, 1990Assignee: Seiko Epson CorporationInventor: Shuji Aruga
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Patent number: 4850685Abstract: A projection-type color display device. The display device includes a light source which provides light and a color separation member which receives the light and which separates the received light into the different colors of red, blue and green light. A light valve device receives the red, blue and green light and modulates the light to produce images. A color synthesis cube prism synthesizes the three monochromatic lights modulated by the light valve. A projection lens system projects the synthesized image onto a screen for viewing.Type: GrantFiled: August 18, 1988Date of Patent: July 25, 1989Assignee: Seiko Epson CorporationInventors: Hiroshi Kamakura, Tomio Sonehara, Takeshi Ono, Junichi Nakamura, Akitaka Yajima, Shuji Aruga
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Patent number: RE36725Abstract: A projection-type display device having a single light source which produces light. A first dichroic mirror group receives the light and separates it into colored light. A transmissive light valve system modulates the colored light and a second dichroic mirror group synthesizes the modulated colored light. A projection system projects the synthesized colored light onto a screen.Type: GrantFiled: August 31, 1995Date of Patent: June 6, 2000Assignee: Seiko Epson CorporationInventors: Tomio Sonehara, Shuji Aruga, Shinji Morozumi