Patents by Inventor Jun Nishikawa

Jun Nishikawa 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).

  • Publication number: 20080158439
    Abstract: A projection optical system for magnifying an image on a primary imaging plane onto a secondary imaging plane includes a first optical system for forming an intermediate image and a second optical system including a concave reflecting surface disposed between the intermediate image and the secondary plane. The first optical system includes first and second groups respectively having negative and positive power, an aperture, and a third group having positive power from the intermediate image. The surfaces of the first and second optical systems have rotational symmetry about a light axis. A ray traveling from the center of the primary plane to the center of the secondary plane intersects the light axis, is reflected off the reflecting surface, intersects the light axis again, and reaches the secondary plane. The following conditions are satisfied: 0.5<?1/?2<3, 1<AST/ASS<5, |AST|/L12<1, and ?3<K_rel.
    Type: Application
    Filed: October 8, 2007
    Publication date: July 3, 2008
    Applicant: Sony Corporation
    Inventor: Jun NISHIKAWA
  • Publication number: 20080151470
    Abstract: A method for manufacturing a laminated electronic component is performed such that a water-repellent agent is applied to end surfaces at which ends of internal electrodes are exposed so as to be filled in spaces along interfaces between insulating layers and the internal electrodes. Subsequently, an abrading step is performed such that the internal electrodes are sufficiently exposed at the end surfaces and an excess water-repellent agent is removed therefrom to enable plating films to be directly formed on the end surfaces.
    Type: Application
    Filed: March 6, 2008
    Publication date: June 26, 2008
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Akihiro MOTOKI, Makoto OGAWA, Tatsuo KUNISHI, Jun NISHIKAWA, Yoshihiko TAKANO, Shigeyuki KURODA
  • Publication number: 20080118721
    Abstract: A high-reliability electronic component without reduction in insulation resistance under high-temperature and high-humidity conditions has satisfactory solderability of external electrodes. The electronic component includes a main body and external electrodes disposed on surfaces of the main body, the external electrodes include underlying electrode layers each containing a metal, alloy layers each disposed on the corresponding underlying electrode layer, Ni plating layers each disposed on the corresponding alloy layer, Ni oxide layers each disposed on the corresponding Ni plating layers, and upper plating layers each disposed on the corresponding Ni oxide layer, each Ni oxide layer having a thickness of about 150 nm or less, and each Ni plating layer having an average particle size of Ni particles of about 2 ?m or more. To form the Ni plating layers having reduced grain boundaries, heat treatment is performed at about 500° C. to about 900° C.
    Type: Application
    Filed: January 3, 2008
    Publication date: May 22, 2008
    Applicant: MURATA MANUFACTURING CO., LTD.
    Inventors: Shigeyuki HORIE, Yutaka OTA, Jun NISHIKAWA
  • Publication number: 20080089008
    Abstract: A multi-layer ceramic capacitor has a temperature characteristic satisfying an X8R property and has a high specific resistance under a high temperature circumstance, in which the dielectric ceramic composition forming the dielectric ceramics is expressed by a formula: BaTiO3+aMgO+bMOx+cReO3/2+dSiO2, wherein MgO represents MgO conversion, MOx represents oxide conversion for 1 atom in 1 molecule of at least one metal selected from V, Cr, and Mn, ReO3/2 represents oxide conversion for 1 atom in 1 molecule of at least one rare earth metal selected from Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Y, and SiO2 represents SiO2 conversion, and wherein 0.4?a?3.0 mol, 0.05?b?0.4 mol, 6.0?c?16.5 mol, 3.0?d?5.0 mol, 2.0?c/d?3.3, based on 100 mol of BaTiO3.
    Type: Application
    Filed: October 10, 2007
    Publication date: April 17, 2008
    Inventors: Jun Nishikawa, Jun Ogasawara, Nobuyuki Koide
  • Publication number: 20080081200
    Abstract: A highly reliable electronic device and a method for manufacturing the same are provided, the electronic device preventing entry of a plating solution via an external electrode and entry of moisture of external environment inside thereof, and generating no soldering defects nor solder popping defects which are caused by precipitation of a glass component on a surface of the external electrode. The structure is formed of Cu-baked electrode layers 6a and 6b primarily composed of Cu, Cu plating layers 7a and 7b which are formed on the Cu-baked electrode layers 6a and 6b and which are processed by a recrystallization treatment, and upper-side plating layers 9a and 9b formed on the Cu plating layers 7a and 7b.
    Type: Application
    Filed: November 6, 2007
    Publication date: April 3, 2008
    Inventors: Hiroshi Katsube, Jun Nishikawa
  • Patent number: 7298603
    Abstract: In one inventive aspect, a multilayer ceramic capacitor is provided, in which occurrence of cracks can be prevented even when temperature of the capacitor itself is increased. Non-flat portions are formed in both sides in a width direction of each of inner electrode layers. In addition, the non-flat portions comprise regions substantially changed into oxide regions, therefore a thermal expansion coefficient of the non-flat portions can be decreased so that stress due to difference in thermal expansion coefficient to non-flat portions can be reduced, and the stress can be dispersed in accordance with curvature or inclination of the non-flat portions. That is, stress generated when temperature of the capacitor itself is increased is decreased and dispersed, thereby occurrence of cracks due to the stress can be prevented in side margins of the ceramic chip.
    Type: Grant
    Filed: July 25, 2006
    Date of Patent: November 20, 2007
    Assignee: Taiyo Yuden Co., Ltd.
    Inventors: Youichi Mizuno, Jun Nishikawa, Chie Kawamura
  • Publication number: 20070237891
    Abstract: A pattern is formed by applying a coating composition containing magnetic particles to an article so that a coating film is formed, and a plurality of sheet form magnets are placed along the front surface of this coating film. Adjacent sheet form magnets are arranged in such a state that the magnetic poles on the front surface and the magnetic poles on the back surface are different between adjacent sheet form magnets, and side surfaces of the sheet form magnets contact each other. The coating composition contains a thermoplastic resin, magnetic particles with flaky form and a specific low boiling point solvent and a specific high boiling point solvent. A magnetic field is applied to the coating film by the sheet form magnets, so that the magnetic particles in the coating film are oriented by the magnetic field and the magnetic particles are oriented substantially parallel to the front surface of the coating film above the contact portions between the sheet form magnets.
    Type: Application
    Filed: April 5, 2007
    Publication date: October 11, 2007
    Applicants: INOAC CORPORATION, SANG BROLI COMPANY LIMITED
    Inventors: Yoshinori Sugiura, Jun Nishikawa, Ryoichi Nakaoka, Chika Kanada, Akito Harada
  • Publication number: 20070184368
    Abstract: There is a need for providing a projection optical system that is appropriate for maintaining high resolution with low distortion, miniaturizing a reflector, decreasing the number of reflectors, and decreasing the depth and the bottom (or top) of a display used for a rear projection television, for example. The projection optical system according to the invention enlarges and projects images from a primary image surface existing at a reducing side to a secondary image surface existing at an enlarging side. The projection optical system has a first optical system L11 and a second optical system L12. The first optical system L11 forms an intermediate image (position II) of the primary image surface. The second optical system L12 has a concave reflector AM1 that forms the secondary image surface resulting from the intermediate image. A light beam travels from the center of the primary image surface and to the center of the secondary image surface and crosses an optical axis.
    Type: Application
    Filed: October 21, 2005
    Publication date: August 9, 2007
    Inventors: Jun Nishikawa, Toshihiro Sunaga
  • Publication number: 20070025055
    Abstract: In one inventive aspect, a multilayer ceramic capacitor is provided, in which occurrence of cracks can be prevented even when temperature of the capacitor itself is increased. Non-flat portions are formed in both sides in a width direction of each of inner electrode layers. In addition, the non-flat portions comprise regions substantially changed into oxide regions, therefore a thermal expansion coefficient of the non-flat portions can be decreased so that stress due to difference in thermal expansion coefficient to non-flat portions can be reduced, and the stress can be dispersed in accordance with curvature or inclination of the non-flat portions. That is, stress generated when temperature of the capacitor itself is increased is decreased and dispersed, thereby occurrence of cracks due to the stress can be prevented in side margins of the ceramic chip.
    Type: Application
    Filed: July 25, 2006
    Publication date: February 1, 2007
    Inventors: Youichi Mizuno, Jun Nishikawa, Chie Kawamura
  • Publication number: 20070025056
    Abstract: In one inventive aspect, a multilayer ceramic capacitor is provided. The capacitor comprises dielectric layers and internal electrode layers alternately stacked. Two of the internal electrode layers that are located outermost and/or at least one of the internal electrode layers that is located inside each outermost internal electrode layer are substantially oxidized and do not function as electrodes. The capacitance of the multilayer ceramic capacitor depends on the unoxidized internal electrode layers other than the oxidized ones. In another inventive aspect, a method for manufacturing a multilayer ceramic capacitor is provided. The method comprises forming green dielectric layers, forming green internal electrode layers, preparing a green ceramic chip, forming green external electrodes, and firing the green ceramic chip.
    Type: Application
    Filed: July 25, 2006
    Publication date: February 1, 2007
    Inventors: Jun Nishikawa, Youichi Mizuno, Hirokazu Orimo
  • Patent number: 7116498
    Abstract: 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: Grant
    Filed: March 7, 2005
    Date of Patent: October 3, 2006
    Assignee: Sony Corporation
    Inventors: Jun Nishikawa, Nobuhiko Nishiki, Yasunori Kuratomi, Tetsuya Kita, Takaaki Iwaki
  • Publication number: 20050200974
    Abstract: 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: Application
    Filed: March 7, 2005
    Publication date: September 15, 2005
    Inventors: Jun Nishikawa, Nobuhiko Nishiki, Yasunori Kuratomi, Tetsuya Kita, Takaaki Iwaki
  • Patent number: 6785055
    Abstract: A zoom lens system has, in order from an enlargement side, a first lens unit having negative optical power, a second lens unit having positive optical power, a third lens unit having positive optical power, a fourth lens unit having negative optical power, including an aperture stop, a fifth lens unit having positive or negative optical power, and a sixth lens unit having positive optical power. Zooming is achieved by varying the first to fifth variable distances between the lens units. The third and fifth lens units move from the enlargement side to the reduction side during zooming from the telephoto end to the wide-angle end. The zoom lens system is substantially telecentric toward the reduction side.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: August 31, 2004
    Assignee: Minolta Co. Ltd.
    Inventors: Jun Nishikawa, Tomoko Nakagawa
  • Patent number: 6583940
    Abstract: A projection system that is capable of providing a high-performance projection system and producing a high contrast projection image by using an optical modulation element, which can be positioned a predetermined distance away from an illumination optical system and a projection optical system. The optical modulation element is capable of modulating light received from the illumination optical system and projecting the modulated light to a projection optical system in the direction of a projection surface.
    Type: Grant
    Filed: June 20, 2001
    Date of Patent: June 24, 2003
    Assignee: Minolta Co., Ltd.
    Inventors: Jun Nishikawa, Shigeru Sawamura, Katsuhiro Takamoto
  • Publication number: 20030103268
    Abstract: A zoom lens system has, from an enlargement side, a first lens unit having a negative optical power, a second lens unit having a positive optical power and disposed on the image side of the first lens unit with a first variable distance secured in between, a third lens unit having a positive optical power and disposed on the image side of the second lens unit with a second variable distance secured in between, a fourth lens unit having a negative optical power, disposed on the image side of the third lens unit with a third variable distance secured in between, and including an aperture stop, a fifth lens unit having a positive or negative optical power and disposed on the image side of the fourth lens unit with a fourth variable distance secured in between, and a sixth lens unit having a positive optical power and disposed on the image side of the fifth lens unit with a fifth variable distance secured in between. Zooming is achieved by varying the first to fifth variable distances.
    Type: Application
    Filed: May 16, 2002
    Publication date: June 5, 2003
    Inventors: Jun Nishikawa, Tomoko Nakagawa
  • Patent number: 6382799
    Abstract: A projection optical apparatus has a light source for emitting light, an illumination optical system for emitting as illumination light the light radiated from the light source, a Digital Micromirror Device™, having a plurality of micromirrors, for separating the illumination light into signal light and unnecessary light by varying, in accordance with a signal, the angles at which the individual micromirrors reflect the illumination light shone thereon, a total internal reflection prism composed of a first prism for totally reflecting and thereby directing the illumination light exiting from the illumination optical system to the Digital Micromirror Device™ and a second prism for transmitting the signal light reflected from the Digital Micromirror Device™, and a projection optical system for projecting the signal light transmitted through the second prism onto a projection surface.
    Type: Grant
    Filed: July 21, 2000
    Date of Patent: May 7, 2002
    Assignee: Minolta Co., Ltd.
    Inventors: Jun Nishikawa, Shigeru Sawamura, Katsuhiro Takamoto
  • Publication number: 20020027720
    Abstract: A projection system that is capable of providing a high-performance projection system and producing a high contrast projection image by using an optical modulation element, which can be positioned a predetermined distance away from an illumination optical system and a projection optical system. The optical modulation element is capable of modulating light received from the illumination optical system and projecting the modulated light to a projection optical system in the direction of a projection surface.
    Type: Application
    Filed: June 20, 2001
    Publication date: March 7, 2002
    Inventors: Jun Nishikawa, Shigeru Sawamura, Katsuhiro Takamoto
  • Patent number: 6275343
    Abstract: A projection optical system has, from the enlargement side to the reduction side, a first, a second, and a third lens unit, and an aperture diaphragm. The negatively-powered first lens unit includes only a negative lens element and has at least one aspherical surface. The positively-powered second lens unit includes at least one positive lens element. The positively-powered third lens unit includes a lens element. The aperture diaphragm is disposed at the front focal point of the third lens unit. The lens element of the third lens unit is made of a material of which anomalous partial dispersibility and Abbe number are defined.
    Type: Grant
    Filed: April 17, 2000
    Date of Patent: August 14, 2001
    Assignee: Minolta Co., Ltd.
    Inventors: Katsuhiro Takamoto, Jun Nishikawa