Patents by Inventor Ryo Kasegawa
Ryo Kasegawa 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: 20140233088Abstract: Provided is a display unit capable of improving display performance. The display unit includes an electrophoretic particle disposed between a pair of electrodes for each pixel; and a voltage control circuit applying a voltage for each pixel, to move the electrophoretic particle. The voltage control circuit counts, for each pixel, a number of applications of a first voltage and a number of applications of a second voltage, the first voltage being applied to move the electrophoretic particle towards one of the electrodes, and the second voltage being applied to move the electrophoretic particle towards the other of the electrodes. Further, at an arbitrary timing following start of display, when the number of applications of the second voltage in part of pixels is smaller than that in other pixel, the voltage control circuit applies the second voltage to the pixel with the smaller number of applications, to bring this smaller number of applications closer to the number of applications in the other pixel.Type: ApplicationFiled: September 28, 2012Publication date: August 21, 2014Applicant: SONY CORPORATIONInventor: Ryo Kasegawa
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Publication number: 20140146099Abstract: A display unit includes a plurality of pixels arranged in a two-dimensional matrix. An image is displayed in a first display mode and a second display mode. In the first display mode, one pixel is configured of a set including J (where J is an integer of 2 or more) first unit pixels emitting a first color, J second unit pixels emitting a second color, and J third unit pixels emitting a third color, and image display is performed through control of operation of each of the unit pixels. In the second display mode, one pixel is configured of a set including j (where j is an integer of 1 or more and less than J) first unit pixels, j second unit pixels, and j third unit pixels, and image display is performed through control of operation of each of the unit pixels.Type: ApplicationFiled: November 13, 2013Publication date: May 29, 2014Applicant: Sony CorporationInventors: Akihito Nishiike, Keiichi Akamatsu, Kitsuko Hatakeyama, Ryo Kasegawa
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Patent number: 8711469Abstract: An electrophoretic element includes: an electrophoretic particle; a porous layer formed of a fibrous structure containing a non-migrating particle having optical reflective characteristics different from those of the electrophoretic particle and having a plurality of pores; and a partition that is partially adjacent to the porous layer and defines a space for accommodating the electrophoretic particle. An area rate of the pores per unit area of the porous layer is small in an adjacent region where the partition is adjacent to the porous layer compared with in a non-adjacent region where the partition is not adjacent to the porous layer.Type: GrantFiled: May 22, 2013Date of Patent: April 29, 2014Assignee: Sony CorporationInventors: Atsuhito Yasui, Hidehiko Takanashi, Ken Kobayashi, Ryo Kasegawa, Aya Shuto
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Publication number: 20140111409Abstract: An image display unit, includes: an image display section having pixels each including red, green, blue, and white pixels; and a signal generating section configured to generate red, green, blue, and white sub-pixel signals, the signal generating section being configured to determine values of the red, green, and blue sub-pixel signals Rcvt, Gcvt, and Bcvt, based on a first matrix and a second matrix, with use of a coefficient ‘Purity’, an additive-color-mixture matrix, and a purity coefficient ‘?’, and being configured to employ a value of the white sub-pixel signal Wcvt as a value of min (RnL, GnL, BnL), where the min (RnL, GnL, BnL) represents a minimum value of the red-, green-, and blue-display image signal RnL, GnL, and BnL that are linearized and normalized and are provided for each of the pixels.Type: ApplicationFiled: September 26, 2013Publication date: April 24, 2014Applicant: Sony CorporationInventors: Ryo Kasegawa, Akihito Nishiike
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Publication number: 20130258450Abstract: An electrophoretic element includes: an electrophoretic particle; a porous layer formed of a fibrous structure containing a non-migrating particle having optical reflective characteristics different from those of the electrophoretic particle and having a plurality of pores; and a partition that is partially adjacent to the porous layer and defines a space for accommodating the electrophoretic particle. An area rate of the pores per unit area of the porous layer is small in an adjacent region where the partition is adjacent to the porous layer compared with in a non-adjacent region where the partition is not adjacent to the porous layer.Type: ApplicationFiled: May 22, 2013Publication date: October 3, 2013Inventors: Atsuhito Yasui, Hidehiko Takanashi, Ken Kobayashi, Ryo Kasegawa, Aya Shuto
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Patent number: 8542431Abstract: An electrophoretic device includes an electrophoretic particle, a porous layer formed of a fibrous structure containing a non-electrophoretic particle having optical reflection characteristics different from optical reflection characteristics of the electrophoretic particle, and a pair of electrodes arranged with the porous layer in between. The porous layer is adjacent to one or both of the pair of electrodes.Type: GrantFiled: March 15, 2012Date of Patent: September 24, 2013Assignee: Sony CorporationInventors: Aya Shuto, Hidehiko Takanashi, Ken Kobayashi, Atsuhito Yasui, Ryo Kasegawa
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Patent number: 8542430Abstract: An electrophoretic device includes: an electrophoretic particle; a porous layer formed of a fibrous structure containing a non-electrophoretic particle having optical reflection characteristics different from those of the electrophoretic particle; and a dividing wall adjacent to the porous layer. The electrophoretic particle, the porous layer, and the dividing wall are in an insulating liquid. Volume resistivity of the fibrous structure is larger than volume resistivity of the insulating liquid, and volume resistivity of the dividing wall is larger than the volume resistivity of the insulating liquid.Type: GrantFiled: March 9, 2012Date of Patent: September 24, 2013Assignee: Sony CorporationInventors: Atsuhito Yasui, Hidehiko Takanashi, Ken Kobayashi, Ryo Kasegawa, Aya Shuto
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Patent number: 8517551Abstract: A phosphor sheet having a laminated structure including a first barrier material, a first barrier material, a first color conversion layer, a second color conversion layer, and a second barrier layer and a display unit and an illuminating device including display unit is provided. A diffusion plate and a display unit including a diffusion plate are also provided.Type: GrantFiled: June 25, 2010Date of Patent: August 27, 2013Assignee: Dexerials CorporationInventors: Tsubasa Tsukahara, Naoji Nada, Ryo Kasegawa, Yasushi Ito, Yoshihiro Oshima
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Patent number: 8482844Abstract: An electrophoretic element includes: an electrophoretic particle; a porous layer formed of a fibrous structure containing a non-migrating particle having optical reflective characteristics different from those of the electrophoretic particle and having a plurality of pores; and a partition that is partially adjacent to the porous layer and defines a space for accommodating the electrophoretic particle. An area rate of the pores per unit area of the porous layer is small in an adjacent region where the partition is adjacent to the porous layer compared with in a non-adjacent region where the partition is not adjacent to the porous layer.Type: GrantFiled: January 26, 2012Date of Patent: July 9, 2013Assignee: Sony CorporationInventors: Atsuhito Yasui, Hidehiko Takanashi, Ken Kobayashi, Ryo Kasegawa, Aya Shuto
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Patent number: 8469530Abstract: [Object] To provide an illumination apparatus capable of suppressing a chromaticity fluctuation due to a view angle and an incident angle. [Solving Means] In an illumination apparatus for a display apparatus that includes a blue-color light-emitting diode (10) as a light source and a phosphor sheet (21) including a phosphor that obtains white light by converting a color of blue light from the blue-color light-emitting diode (10), diffusion plates (22, 23) are respectively provided opposed to a light-emitting-side surface and a light-incident-side surface of the phosphor sheet (21). The diffusion plate (22) opposed to the light-emitting-side surface of the phosphor sheet (21) suppresses a fluctuation of white-color chromaticity due to a view angle, and the diffusion plate (23) opposed to the light-incident-side surface of the phosphor sheet (21) suppresses a fluctuation of white-color chromaticity due to an incident angle.Type: GrantFiled: December 4, 2008Date of Patent: June 25, 2013Assignee: Dexerials CorporationInventors: Yasushi Ito, Ryo Kasegawa, Naoji Nada
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Publication number: 20120314273Abstract: An electrophoretic device includes an electrophoretic particle, a porous layer formed of a fibrous structure containing a non-electrophoretic particle having optical reflection characteristics different from optical reflection characteristics of the electrophoretic particle, and a pair of electrodes arranged with the porous layer in between. The porous layer is adjacent to one or both of the pair of electrodes.Type: ApplicationFiled: March 15, 2012Publication date: December 13, 2012Applicant: SONY CORPORATIONInventors: Aya Shuto, Hidehiko Takanashi, Ken Kobayashi, Atsuhito Yasui, Ryo Kasegawa
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Publication number: 20120250138Abstract: An electrophoretic device includes: an electrophoretic particle; a porous layer formed of a fibrous structure containing a non-electrophoretic particle having optical reflection characteristics different from those of the electrophoretic particle; and a dividing wall adjacent to the porous layer. The electrophoretic particle, the porous layer, and the dividing wall are in an insulating liquid. Volume resistivity of the fibrous structure is larger than volume resistivity of the insulating liquid, and volume resistivity of the dividing wall is larger than the volume resistivity of the insulating liquid.Type: ApplicationFiled: March 9, 2012Publication date: October 4, 2012Applicant: Sony CorporationInventors: Atsuhito Yasui, Hidehiko Takanashi, Ken Kobayashi, Ryo Kasegawa, Aya Shuto
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Publication number: 20120212798Abstract: An electrophoretic element includes: an electrophoretic particle; a porous layer formed of a fibrous structure containing a non-migrating particle having optical reflective characteristics different from those of the electrophoretic particle and having a plurality of pores; and a partition that is partially adjacent to the porous layer and defines a space for accommodating the electrophoretic particle. An area rate of the pores per unit area of the porous layer is small in an adjacent region where the partition is adjacent to the porous layer compared with in a non-adjacent region where the partition is not adjacent to the porous layer.Type: ApplicationFiled: January 26, 2012Publication date: August 23, 2012Applicant: Sony CorporationInventors: Atsuhito Yasui, Hidehiko Takanashi, Ken Kobayashi, Ryo Kasegawa, Aya Shuto
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Publication number: 20110002140Abstract: A phosphor sheet having a laminated structure including a first barrier material, a first barrier material, a first color conversion layer, a second color conversion layer, and a second barrier layer and a display unit and an illuminating device including display unit is provided. A diffusion plate and a display unit including a diffusion plate are also provided.Type: ApplicationFiled: June 25, 2010Publication date: January 6, 2011Applicant: SONY CORPORATIONInventors: Tsubasa Tsukahara, Naoji Nada, Ryo Kasegawa, Yasushi Ito, Yoshihiro Oshima
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Publication number: 20100246160Abstract: [Object] To provide an illumination apparatus capable of suppressing a chromaticity fluctuation due to a view angle and an incident angle. [Solving Means] In an illumination apparatus for a display apparatus that includes a blue-color light-emitting diode (10) as a light source and a phosphor sheet (21) including a phosphor that obtains white light by converting a color of blue light from the blue-color light-emitting diode (10), diffusion plates (22, 23) are respectively provided opposed to a light-emitting-side surface and a light-incident-side surface of the phosphor sheet (21). The diffusion plate (22) opposed to the light-emitting-side surface of the phosphor sheet (21) suppresses a fluctuation of white-color chromaticity due to a view angle, and the diffusion plate (23) opposed to the light-incident-side surface of the phosphor sheet (21) suppresses a fluctuation of white-color chromaticity due to an incident angle.Type: ApplicationFiled: December 4, 2008Publication date: September 30, 2010Applicant: Sony CorporationInventors: Yasushi Ito, Ryo Kasegawa, Naoji Nada
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Publication number: 20100187975Abstract: An optical member realizing suppressed occurrence of a light loss between a phosphor layer performing color conversion and itself, and a display device using the same is provided. The optical member includes a base member having two opposed surfaces, and a phosphor layer provided integrally with one surface of the base member and containing a phosphor that converts a color light to another color light.Type: ApplicationFiled: January 14, 2010Publication date: July 29, 2010Applicant: Sony CorporationInventors: Tsubasa Tsukahara, Ryo Kasegawa, Yasushi Ito, Naoji Nada
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Patent number: 7580433Abstract: A laser system includes a laser diode that oscillates in a multi-mode and has characteristics in which its oscillation wavelength varies with temperature, a grating that receives a light beam emitted from the laser diode and returns a diffracted beam to the laser diode, a mechanism that changes the wavelength of the diffracted beam returned to the laser diode, a wavelength detector that detects the wavelength of an output beam which is the same as that of the diffracted beam returned to the laser diode, a temperature regulator that maintains the laser diode at a predetermined temperature, and a control unit that controls the mechanism so that the output beam having a predetermined wavelength is output and controls the temperature regulator so that the laser diode oscillates at the predetermined wavelength.Type: GrantFiled: May 1, 2007Date of Patent: August 25, 2009Assignee: Sony CorporationInventors: Tomiji Tanaka, Kageyasu Sako, Ryo Kasegawa, Shinji Yamada, Katsuhiro Agatsuma
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Patent number: 7426222Abstract: A laser apparatus is disclosed. An optical element receives at least a part of laser light emitted from a laser generation source and generates interference fringes. Each of first and second two-divided detectors has two detectors arranged in the direction of which the interference fringes appear. Each of the detectors detects an amount of light of the interference fringes. These two-divided detectors are spaced apart for an odd-number multiple of nearly ¼ period of interference fringes and disposed on a plane perpendicular to an optical path of the interference fringes. Each of first and second calculation sections calculates a first difference signal of detection signals of two detectors of the two-divided detector. A selection section selects one of the first and second difference signals. A determination section determines a wavelength of the laser light corresponding to a value of the difference signal selected from the first and second difference signals.Type: GrantFiled: June 19, 2006Date of Patent: September 16, 2008Assignee: Sony CorporationInventors: Tomiji Tanaka, Kageyasu Sako, Ryo Kasegawa
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Publication number: 20080180659Abstract: A laser system includes a laser diode that oscillates in a multi-mode and has characteristics in which its oscillation wavelength varies with temperature, a grating that receives a light beam emitted from the laser diode and returns a diffracted beam to the laser diode, a mechanism that changes the wavelength of the diffracted beam returned to the laser diode, a wavelength detector that detects the wavelength of an output beam which is the same as that of the diffracted beam returned to the laser diode, a temperature regulator that maintains the laser diode at a predetermined temperature, and a control unit that controls the mechanism so that the output beam having a predetermined wavelength is output and controls the temperature regulator so that the laser diode oscillates at the predetermined wavelength.Type: ApplicationFiled: May 1, 2007Publication date: July 31, 2008Applicant: Sony CorporationInventors: Tomiji Tanaka, Kageyasu Sako, Ryo Kasegawa, Shinji Yamada, Katsuhiro Agatsuma
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Publication number: 20060285125Abstract: A laser apparatus is disclosed. An optical element receives at least a part of laser light emitted from a laser generation source and generates interference fringes. Each of first and second two-divided detectors has two detectors arranged in the direction of which the interference fringes appear. Each of the detectors detects an amount of light of the interference fringes. These two-divided detectors are spaced apart for an odd-number multiple of nearly ¼ period of interference fringes and disposed on a plane perpendicular to an optical path of the interference fringes. Each of first and second calculation sections calculates a first difference signal of detection signals of two detectors of the two-divided detector. A selection section selects one of the first and second difference signals. A determination section determines a wavelength of the laser light corresponding to a value of the difference signal selected from the first and second difference signals.Type: ApplicationFiled: June 19, 2006Publication date: December 21, 2006Inventors: Tomiji Tanaka, Kageyasu Sako, Ryo Kasegawa