Patents by Inventor Kazuhiko Sakai
Kazuhiko Sakai 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: 20090309485Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.Type: ApplicationFiled: May 14, 2009Publication date: December 17, 2009Applicant: Nichia CorporationInventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
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Publication number: 20090296739Abstract: A first control data generation unit configured to generate first control data, a control data allocation processing unit configured to perform allocation processing for the first control data in order to reserve an area for the first control data in a frame memory, a data write control unit configured to write user data in an area in the frame memory except the area where the allocation processing is performed, and a transmission unit configured to transmit transmission data based on the data written in the frame memory are included, and the data write control unit writes the generated first control data in the area where the allocation processing is performed in the frame memory after generation of the first control data and after the allocation processing of the first control data and after writing the user data and before the transmission data is transmitted.Type: ApplicationFiled: May 29, 2009Publication date: December 3, 2009Applicant: FUJITSU MICROELECTRONICS LIMITEDInventors: Kazuhiko Sakai, Toru Igarashi, Koichi Suzuki, Shinya Hachisu
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Publication number: 20090284132Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.Type: ApplicationFiled: May 15, 2009Publication date: November 19, 2009Applicant: Nichia CorporationInventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
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Patent number: 7597823Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu); contains the another elements.Type: GrantFiled: October 3, 2007Date of Patent: October 6, 2009Assignee: Nichia CorporationInventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
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Publication number: 20090230840Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.Type: ApplicationFiled: May 14, 2009Publication date: September 17, 2009Applicant: Nichia CorporationInventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
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Patent number: 7550096Abstract: A method for producing a fluorescent material involving firing a mixture of a stock material and a flux. The method may involve a first firing process involving firing the mixture of the stock material and the flux in a weakly reducing atmosphere, followed by firing the resulting material in a second reducing atmosphere that is more reducing than the first weakly reducing atmosphere. The flux may include a liquid.Type: GrantFiled: December 28, 2007Date of Patent: June 23, 2009Assignee: Nichia CorporationInventors: Kensho Sakano, Kazuhiko Sakai, Yuji Okada, Toshihiko Umezu
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Publication number: 20090128630Abstract: When an image processing device subjects images photographed by on-vehicle cameras to viewpoint changing, and joints the images to form a top view image, and superposes boundary indicators at joints of the top view image to display it as an image with boundary regions to be monitored in a display, the boundary regions, or at least partial areas thereof, of the top view image are changed in appearance until a passage of predetermined time after predetermined conditions are established. Thus, the boundary regions can be made conspicuous only when necessary to be presented to an occupant of a vehicle, and an easily seen top view image can be displayed while preventing a reduction in effectiveness of warning of the boundary regions.Type: ApplicationFiled: January 15, 2009Publication date: May 21, 2009Inventors: Akihiro KANAOKA, Makoto KIMURA, Kazuhiko SAKAI, Daisuke SUGAWARA
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Publication number: 20090051291Abstract: In an electrodeless discharge lamp 1 comprising a bulb 10 into which discharge gas and mercury which is controlled at a temperature of a coldest spot are filled, a power coupler 20 generating high frequency electromagnetic field, and a ferrule 15 for coupling the bulb 10 and the power coupler 20, the bulb 10 is configured of a substantially spherical barrel 14 formed of a transparent material and having an opening, and a sealing member 11 welded to the opening of the barrel 14 and having a substantially cylindrical cavity 5; a protrusion 4, which becomes a coldest spot when the lamp is lit in a state that the ferrule 15 is disposed upward, is formed at an apex of the bulb 10; and a protruding portion 17 is formed in a vicinity of just above the ferrule 15 of the bulb 10, that is, in a bulb neck portion 19 so that the bulb neck portion 19 becomes the coldest spot when the lamp is lit in a state that the ferrule 15 is disposed downward.Type: ApplicationFiled: March 23, 2006Publication date: February 26, 2009Applicant: MATSUSHITA ELECTRIC WORKS, LTD.Inventors: Yoshinori Tsuzuki, Kazuhiko Sakai, Shin Ukegawa, Shigeki Matsuo
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Publication number: 20090010630Abstract: A camera system includes a detection unit that detects fitting errors of a camera as displacement quantities in a first direction, a second direction and an optical axis rotating direction of an image picked up by the camera, a selection unit that selects a rotation correcting quantity corresponding to the displacement quantity in the optical axis rotating direction from plural rotation correction maps prepared in advance, a computation unit that computes the correcting quantities in the first direction and the second direction respectively based on the detected displacement quantities in the first direction and the second direction by means of linear expressions; and a correction unit that corrects the displacements in the first direction, the second direction and the optical axis rotating direction of the picked up image based on the selected rotation correcting quantity and the computed correcting quantities in the first direction and the second direction.Type: ApplicationFiled: July 2, 2008Publication date: January 8, 2009Inventors: Kiyoshi Higashibara, Daisuke Sugawara, Kazuhiko Sakai, Akihiro Kanaoka
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Publication number: 20090009604Abstract: An image processing system for a vehicle including a plurality of image pickup devices directed toward different predetermined areas around the vehicle to provide captured images and a display unit. Subject areas are extracted from the captured images, wherein the subject areas correspond to partial areas of predetermined areas captured by the image pickup devices that are adjacent to the image pickup devices. Brightness values of the subject areas are equalized to provide processed images, and the processed image are combined to generate a display image.Type: ApplicationFiled: May 23, 2008Publication date: January 8, 2009Applicant: NISSAN MOTOR CO., LTD.Inventors: Akihiro Kanaoka, Kazuhiko Sakai, Daisuke Sugawara, Sotaro Otani
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Publication number: 20080099727Abstract: A light emitting diode comprising an LED chip having a light emitting layer made of a nitride compound semiconductor and a light transmitting resin that includes a fluorescent material which absorbs at least a part of light emitted by the LED chip and emits light of a different wavelength, wherein the fluorescent material includes a fluorescent particles of small particle size and a fluorescent particles of large particle size, the fluorescent particles of large particle size being distributed in the vicinity of the LED chip in the light transmitting resin to form a wavelength converting layer, the fluorescent particles of small particle size being distributed on the outside of the wavelength converting layer in the light transmitting resin.Type: ApplicationFiled: December 28, 2007Publication date: May 1, 2008Applicant: NICHIA CORPORATIONInventors: Kensho SAKANO, Kazuhiko Sakai, Yuji Okada, Toshihiko Umezu
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Patent number: 7342357Abstract: A light emitting diode comprising an LED chip having a light emitting layer made of a nitride compound semiconductor and a light transmitting resin that includes a fluorescent material which absorbs at least a part of light emitted by the LED chip and emits light of a different wavelength, wherein the fluorescent material includes a fluorescent particles of small particle size and a fluorescent particles of large particle size, the fluorescent particles of large particle size being distributed in the vicinity of the LED chip in the light transmitting resin to form a wavelength converting layer, the fluorescent particles of small particle size being distributed on the outside of the wavelength converting layer in the light transmitting resin.Type: GrantFiled: June 9, 2005Date of Patent: March 11, 2008Assignee: Nichia CorporationInventors: Kensho Sakano, Kazuhiko Sakai, Yuji Okada, Toshihiko Umezu
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Publication number: 20080012940Abstract: When an image processing device subjects images photographed by on-vehicle cameras to viewpoint changing, and joints the images to form a top view image, and superposes masks on joints of the top view image to display it as an image to be monitored in a display, the masks of the top view image are highlighted until a passage of predetermined time after predetermined conditions are established. Thus, the masks can be made conspicuous only when necessary to be presented to an occupant of a vehicle, and an easily seen top view image can be displayed while preventing a reduction in effectiveness of warning of the masks.Type: ApplicationFiled: July 5, 2007Publication date: January 17, 2008Inventors: Akihiro Kanaoka, Makoto Kimura, Kazuhiko Sakai, Daisuke Sugawara
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Publication number: 20070262730Abstract: In an electrodeless discharge lamp suitable for use at a place with unfavorable environmental conditions or at a place where lamp replacement is difficult, the replacement of a lamp unit is facilitated and the lamp unit is prevented from falling off from a power coupler unit even if there is component deterioration caused by long-term use. A metallic elastic member is provided near a position on a metallic heat conduction member of the power coupler unit that is farthest from an electromagnetic field generating portion. In addition to an ordinary coupling structure between the power coupler unit and a coupling member, the elastic member is engaged with the coupling member of the lamp unit. When the lamp unit is mounted on or removed from the power coupler unit, a bulb of the lamp unit is turned relative to the power coupler unit about the axis and moved forward/backward in the direction of the axis.Type: ApplicationFiled: November 24, 2004Publication date: November 15, 2007Applicants: MATSUSHITA ELECTRIC WORKS, LTD., IKEDA ELECTRIC CO., LTD.Inventors: Hiroshi Ogasawara, Hidenori Kakehashi, Ryusuke Ura, Hiroshi Miyasaki, Keisuke Harada, Yoshinobu Shibata, Shigeki Matsuo, Kazuhiko Sakai
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Publication number: 20060038477Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y?(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.Type: ApplicationFiled: October 18, 2005Publication date: February 23, 2006Applicant: Nichia CorporationInventors: Hiroto Tamaki, Masatoshi Kameshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
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Patent number: 6960878Abstract: A light emitting diode comprising an LED chip having a light emitting layer made of a nitride compound semiconductor and a light transmitting resin that includes a fluorescent material which absorbs at least a part of light emitted by the LED chip and emits light of a different wavelength, wherein the fluorescent material includes a fluorescent particles of small particle size and a fluorescent particles of large particle size, the fluorescent particles of large particle size being distributed in the vicinity of the LED chip in the light transmitting resin to form a wavelength converting layer, the fluorescent particles of small particle size being distributed on the outside of the wavelength converting layer in the light transmitting resin.Type: GrantFiled: January 24, 2002Date of Patent: November 1, 2005Assignee: Nichia CorporationInventors: Kensho Sakano, Kazuhiko Sakai, Yuji Okada, Toshihiko Umezu
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Publication number: 20050232343Abstract: A matched filter able to reduce the size of a circuit is disclosed that includes a shift register, a spreading code storage unit, a multiplier, an accumulator, a spreading code generator, and an accumulation and storage unit. The shift register has a number of sixteen taps, which equals the square root of the spreading factor 256, and holds and bit-shifts received data. The spreading code generator generates spreading codes divided by the number of the taps at a calculation rate roughly sixteen times higher than a data rate of the received data of 3.84 MHz. The spreading code storage unit stores the divided spreading codes generated in the spreading code generator sequentially at the calculation rate. The multiplier 15 multiplies the received data stored in the shift register with the divided spreading codes stored in the spreading code storage unit at the calculation rate. The accumulator sums the products from the multiplier at the calculation rate.Type: ApplicationFiled: September 1, 2004Publication date: October 20, 2005Inventors: Kazuhiko Sakai, Nobukazu Koizumi
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Publication number: 20050224821Abstract: A light emitting diode comprising an LED chip having a light emitting layer made of a nitride compound semiconductor and a light transmitting resin that includes a fluorescent material which absorbs at least a part of light emitted by the LED chip and emits light of a different wavelength, wherein the fluorescent material includes a fluorescent particles of small particle size and a fluorescent particles of large particle size, the fluorescent particles of large particle size being distributed in the vicinity of the LED chip in the light transmitting resin to form a wavelength converting layer, the fluorescent particles of small particle size being distributed on the outside of the wavelength converting layer in the light transmitting resin.Type: ApplicationFiled: June 9, 2005Publication date: October 13, 2005Applicant: NICHIA CORPORATIONInventors: Kensho Sakano, Kazuhiko Sakai, Yuji Okada, Toshihiko Umezu
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Publication number: 20040135504Abstract: To provide a phosphor containing a comparatively much red component and having high light emitting efficiency, high brightness and further high durability, the nitride phosphor is represented by the general formula LXMYN((2/3)X+(4/3)Y):R or LXMYOZN((2/3)X+(4/3)Y−(2/3)Z):R (wherein L is at least one or more selected from the Group II Elements consisting of Mg, Ca, Sr, Ba and Zn, M is at least one or more selected from the Group IV Elements in which Si is essential among C, Si and Ge, and R is at least one or more selected from the rare earth elements in which Eu is essential among Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er and Lu.); contains the another elements.Type: ApplicationFiled: November 24, 2003Publication date: July 15, 2004Inventors: Hiroto Tamaki, Masatoshi Kemeshima, Suguru Takashima, Motokazu Yamada, Takahiro Naitou, Kazuhiko Sakai, Yoshinori Murazaki
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Patent number: 6639341Abstract: A metal halide discharge lamp which is capable of reducing a color change when subjected to a variation in the lamp power and/or the voltage supplied to the lamp. The metal halide lamp has an arc tube filled with at least sodium halide and scandium halide. The arc tube is formed at its opposite ends with electrodes which gives an arc discharge therebetween. The lamp has regulator means for keeping a coldest spot temperature of the arc tube at 550° C. or more when operating the lamp at a lamp power which is 50% or rated lamp power. It is found that when the lamp is configured to have a coldest spot temperature at 550° C. or more when operating the lamp at a lamp power which is 50% of the rated lamp power, the lamp shows much less color variation even subjected to the lamp voltage variation, thereby maintaining a desired color.Type: GrantFiled: March 27, 2000Date of Patent: October 28, 2003Assignee: Matsushita Electric Works, Ltd.Inventors: Kazuhiko Sakai, Atsunori Okada, Singo Higashisaka, Takuma Hashimoto