Patents by Inventor Hironori Kikkawa
Hironori Kikkawa 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: 9786712Abstract: There is provided a radiation image pickup unit including: a plurality of pixels each configured to generate a signal charge based on a radiation; a device substrate including a photoelectric conversion element for each pixel; a wavelength conversion layer provided on a light incident side of the device substrate, and configured to convert a wavelength of the radiation into other wavelength; and a partition wall separating the wavelength conversion layer for each pixel. The radiation image pickup unit is configured to allow a gap between the wavelength conversion layer and the device substrate to be equal to or larger than a threshold or equal to or smaller than the threshold, the threshold being preset based on a spatial frequency of an image pickup target.Type: GrantFiled: July 4, 2014Date of Patent: October 10, 2017Assignee: SONY CORPORATIONInventors: Shinji Fujimoto, Hironori Kikkawa, Yasuhiro Yamada, Michiru Senda
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Publication number: 20160163763Abstract: There is provided a radiation image pickup unit including: a plurality of pixels each configured to generate a signal charge based on a radiation; a device substrate including a photoelectric conversion element for each pixel; a wavelength conversion layer provided on a light incident side of the device substrate, and configured to convert a wavelength of the radiation into other wavelength; and a partition wall separating the wavelength conversion layer for each pixel. The radiation image pickup unit is configured to allow a gap between the wavelength conversion layer and the device substrate to be equal to or larger than a threshold or equal to or smaller than the threshold, the threshold being preset based on a spatial frequency of an image pickup target.Type: ApplicationFiled: July 4, 2014Publication date: June 9, 2016Inventors: Shinji FUJIMOTO, Hironori KIKKAWA, Yasuhiro YAMADA, Michiru SENDA
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Patent number: 8373830Abstract: A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the enType: GrantFiled: August 8, 2011Date of Patent: February 12, 2013Assignee: NLT Technologies, Ltd.Inventors: Hironori Kikkawa, Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno
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Publication number: 20110285946Abstract: A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the enType: ApplicationFiled: August 8, 2011Publication date: November 24, 2011Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Hironori KIKKAWA, Michiaki SAKAMOTO, Yuichi YAMAGUCHI, Hidenori IKENO, Fumihiko MATSUNO
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Patent number: 7751022Abstract: A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the enType: GrantFiled: October 5, 2007Date of Patent: July 6, 2010Assignee: NEC LCD Technologies, Ltd.Inventors: Hironori Kikkawa, Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno
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Patent number: 7705945Abstract: A switching element is formed on a substrate disposed proximate a liquid crystal layer. A two layer insulation film is formed on the substrate, including a lower film and an upper film. The two layer insulation film overlays the switching element. A convex/concave structure is formed on an upper surface of the two layer insulation film by removing portions of the upper film. A reflection electrode is formed on a surface of the convex/concave structure.Type: GrantFiled: July 10, 2006Date of Patent: April 27, 2010Assignees: NEC Corporation, NEC LCD Technologies, LtdInventors: Hiroshi Kanou, Yuichi Yamaguchi, Hironori Kikkawa
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Patent number: 7652733Abstract: There is provided a light-reflector used in a liquid crystal display device which uses an externally incident light as a light source by reflecting the externally incident light to a viewer, wherein the light-reflector is formed at a surface thereof with a rugged pattern comprised of an alternating pattern of pixel pattern areas, each pixel pattern area positioned to overlie a respective one pixel of the liquid crystal display device, each of the pixel pattern areas of the alternating pattern being different, wherein each pixel pattern area of the alternating pattern is comprised of alternately formed recessed and raised portions, and the alternating pattern is formed periodically repeatedly every two pixels.Type: GrantFiled: November 7, 2002Date of Patent: January 26, 2010Assignee: NEC LCD Technologies, Ltd.Inventors: Michiaki Sakamoto, Hironori Kikkawa, Kenkichi Harada
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Patent number: 7561238Abstract: In a liquid crystal display device comprising a first substrate 101 having a color filter, a second substrate 131 and a liquid crystal layer disposed therebetween, a color filter layer 110 is disposed on a protection film 108 of a thin film transistor formed on the first substrate 101 so as to be partitioned by a light shielding portion 111, and a common electrode 103 is disposed thereon. A pixel electrode to be connected to a source electrode 107 is disposed through a through hole formed in an overcoat layer (interlayer separation film) 112. On the first substrate below the color filter layer 110 are provided plural scan signal electrodes, plural video signal electrodes crossing the scan signal electrodes in a matrix form, plural thin film transistors formed in association with the crossing points between the electrodes.Type: GrantFiled: April 13, 2007Date of Patent: July 14, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Michiaki Sakamoto, Takahiko Watanabe, Hirofumi Ihara, Hironori Kikkawa, Mamoru Okamoto, Shinichi Nakata, Yuji Yamamoto, Masayoshi Suzuki, Teruaki Suzuki, Toshiya Ishii, Hiroshi Kanoh
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Patent number: 7522254Abstract: A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the enType: GrantFiled: July 12, 2005Date of Patent: April 21, 2009Assignee: NEC LCD TechnologiesInventors: Hironori Kikkawa, Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno
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Patent number: 7514303Abstract: A liquid crystal display device includes (a) a first substrate, (b) a second substrate spaced away from and facing the first substrate, (c) a liquid crystal layer sandwiched between the first and second substrates, (d) a transistor formed on the first substrate, (e) a wiring layer formed on the first substrate and electrically connected to the transistor, (f) a reflection electrode formed on the first substrate, an external incident light being reflected at the reflection electrode towards a viewer, and (g) a compensation layer formed directly on the wiring layer. The reflection electrode does not cover the wiring layer therewith, and the compensation layer has almost the same height as a height of the reflection electrode, the height being measured from a surface of the first substrate.Type: GrantFiled: December 11, 2006Date of Patent: April 7, 2009Assignee: NEC LCD Technologies, Ltd.Inventors: Yuichi Yamaguchi, Hironori Kikkawa, Hiroshi Kanoh, Teruaki Suzuki, Hidenori Ikeno
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Publication number: 20090079918Abstract: A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the enType: ApplicationFiled: March 19, 2008Publication date: March 26, 2009Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Hironori Kikkawa, Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno
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Publication number: 20080286890Abstract: A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the enType: ApplicationFiled: October 5, 2007Publication date: November 20, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Hironori Kikkawa, Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno
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Patent number: 7450198Abstract: A reflection-type liquid crystal display according to the invention includes two glass substrates, a transparent electrode provided on one glass substrate, an insulator film which is provided on another glass substrate and on which an uneven structure is formed, a reflecting electrode provided on the insulator film, and a liquid crystal layer sandwiched between a side of the transparent electrode and a side of the reflecting electrode. The insulator film includes a first insulating layer in which a large number of depressions isolated as surrounded by protrusions are irregularly arranged and a second insulating layer covering the insulating layer entirely. The protrusions are all connected in a network, so that if some of these protrusions have weaker adherence with an underlying layer, they can be supported by the surrounding protrusions.Type: GrantFiled: June 29, 2006Date of Patent: November 11, 2008Assignees: NEC Corporation, NEC LCD Technologies, LtdInventors: Hiroshi Kanou, Yuichi Yamaguchi, Teruaki Suzuki, Hironori Kikkawa
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Publication number: 20080198315Abstract: A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the enType: ApplicationFiled: March 19, 2008Publication date: August 21, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Hironori Kikkawa, Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno
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Publication number: 20080192188Abstract: A liquid crystal display device including a first substrate, a second substrate facing and spaced away from the first substrate, a liquid crystal layer sandwiched between the first and second substrates, a switching device formed on the first substrate, a first electrically insulating film randomly patterned on the first substrate, a second electrically insulating film covering the first electrically insulating film therewith, and having a wavy surface, and a reflection electrode formed on the second electrically insulating film, and electrically connected to an electrode of the switching device, wherein a light passing through the second substrate and the liquid crystal layer is reflected at the reflection electrode, and the second electrically insulating film extends outwardly from the first electrically insulating film by a certain length at an end of a display region in which images are to be displayed, such that a step formed by the first and second electrically insulating films in the vicinity of the enType: ApplicationFiled: April 7, 2008Publication date: August 14, 2008Applicant: NEC LCD TECHNOLOGIES, LTD.Inventors: Hironori KIKKAWA, Michiaki Sakamoto, Yuichi Yamaguchi, Hidenori Ikeno, Fumihiko Matsuno
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Patent number: 7391488Abstract: In a reflection type liquid crystal display device having a front light and a reflection type liquid crystal panel including a reflection electrode of uneven structure, average tilt angles of the uneven structure of the reflection electrode are changed to form a high directivity reflective region having a characteristic reflecting an incident light from the front light in a vertical direction and a wide viewing angle reflective region having a characteristic reflecting an outside light incident slantingly from the front in a vertical direction, thereby forming the high directivity reflective region and the wide viewing angle reflective region to be mixed in the reflection electrode in the same display device.Type: GrantFiled: May 28, 2003Date of Patent: June 24, 2008Assignee: NEC LCD Technologies, Ltd.Inventors: Fumihiko Fujishiro, Hironori Kikkawa, Michiaki Sakamoto
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Patent number: 7369201Abstract: A liquid-crystal display suitable for the optically compensated birefringence (OCB) display mode is used so as to simplify the voltage setting relating to display of each color by setting as follows. A liquid-crystal layer is oriented to bend alignment between a pair of substrates. A phase compensation plate is set for compensating a phase of the liquid-crystal layer outside of each of the substrates. And a retardation between the liquid-crystal and the phase compensation plates is set to a value ½ or less of the minimum wavelength of the light relating to display.Type: GrantFiled: March 16, 2000Date of Patent: May 6, 2008Assignee: NEC LCD Technologies, Ltd.Inventors: Hironori Kikkawa, Takahiko Watanabe
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Publication number: 20080074586Abstract: In a liquid crystal display device comprising a first substrate 101 having a color filter, a second substrate 131 and a liquid crystal layer disposed therebetween, a color filter layer 110 is disposed on a protection film 108 of a thin film transistor formed on the first substrate 101 so as to be partitioned by a light shielding portion 111, and a common electrode 103 is disposed thereon. A pixel electrode to be connected to a source electrode 107 is disposed through a through hole formed in an overcoat layer (interlayer separation film) 112. On the first substrate below the color filter layer 110 are provided plural scan signal electrodes, plural video signal electrodes crossing the scan signal electrodes in a matrix form, plural thin film transistors formed in association with the crossing points between the electrodes.Type: ApplicationFiled: April 13, 2007Publication date: March 27, 2008Inventors: Michiaki Sakamoto, Takahiko Watanabe, Hirofumi Ihara, Hironori Kikkawa, Mamoru Okamoto, Shinichi Nakata, Yuji Yamamoto, Masayoshi Suzuki, Teruaki Suzuki, Toshiya Ishii, Hiroshi Kanoh
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Patent number: 7245337Abstract: A reflection electrode has an undulated shape and whose normal direction is distributed unevenly to a specific azimuth angle and whose reflection light intensity depends on said azimuth angle. Openings are formed in that area of the reflection electrode which has a tilt angle of 0 degree to 2 degrees and/or a tilt angle of 10 degrees or higher. The retardation of a liquid crystal layer is changed by making the liquid crystal molecular alignment mode different between the openings and the reflection electrode, so that the intensity of output light is increased in reflection mode as well as in transmission mode. The balance of colors displayed in transmission mode is determined by determining the area of the openings in pixels of each color, and the color temperature is set higher in transmission mode than in reflection mode. This provides a semi-transmission type liquid crystal display which has an excellent visibility in reflection mode as well as in transmission mode.Type: GrantFiled: October 17, 2005Date of Patent: July 17, 2007Assignee: NEC LCD Technologies, Ltd.Inventors: Hidenori Ikeno, Masayoshi Suzuki, Youichi Murayama, Michiaki Sakamoto, Fumihiko Matsuno, Hironori Kikkawa, Yuichi Yamaguchi
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Patent number: 7220625Abstract: A liquid crystal display device includes (a) a first substrate, (b) a second substrate spaced away from and facing the first substrate, (c) a liquid crystal layer sandwiched between the first and second substrates, (d) a transistor formed on the first substrate, (e) a wiring layer formed on the first substrate and electrically connected to the transistor, (f) a reflection electrode formed on the first substrate, an external incident light being reflected at the reflection electrode towards a viewer, and (g) a compensation layer formed directly on the wiring layer. The reflection electrode does not cover the wiring layer therewith, and the compensation layer has almost the same height as a height of the reflection electrode, the height being measured from a surface of the first substrate.Type: GrantFiled: January 7, 2005Date of Patent: May 22, 2007Assignee: NEC LCD TechnologiesInventors: Yuichi Yamaguchi, Hironori Kikkawa, Hiroshi Kanoh, Teruaki Suzuki, Hidenori Ikeno