Patents by Inventor Fumihiko Nakazawa
Fumihiko Nakazawa 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).
-
Patent number: 7522156Abstract: Laser light emitted by a light emitting element is made parallel light by a collimation lens, passes through an aperture of an aperture mirror, and is then angularly scanned in a plane substantially parallel to a display screen by rotation of a polygon mirror and projected onto a recurrence reflection sheet. Then, after the reflected light from the recurrence reflection sheet is reflected by the polygon mirror and aperture mirror, the light is focused by a condenser lens to enter a light receiving element. The aperture mirror has an asymmetrical shape in the scanning direction and/or the vertical direction about the optical axis, according to a scanning surface opening width of the polygon mirror.Type: GrantFiled: June 7, 2001Date of Patent: April 21, 2009Assignee: Fujitsu LimitedInventors: Satoshi Sano, Yasuhide Iwamoto, Fumihiko Nakazawa, Nobuyasu Yamaguchi
-
Patent number: 7502015Abstract: A transducer for excitation including two electrode, and at least one of the two electrodes is a comb-like electrode including a plurality of comb-like electrode fingers and a linear bus electrode to which one end of each of the plural comb-like electrode finger is connected. When dividing the transducer into two areas in the length direction of the bus electrode, at least one connection portion for one of the two electrodes is disposed in one of the two areas, while at least one connection portion for the other electrode is disposed in the other area.Type: GrantFiled: December 22, 2004Date of Patent: March 10, 2009Assignee: Fujitsu LimitedInventors: Takashi Katsuki, Satoshi Sano, Yuji Takahashi, Fumihiko Nakazawa
-
Patent number: 7489304Abstract: A substrate made of glass serves both as a substrate for a touch panel and as that for a front light, and has both functions of propagating an ultrasonic wave in order to detect a touched position, and propagating light emitted from a light source to guide the light toward a reflective-type liquid crystal display. In the case where an image on the liquid crystal display is made visible by external light, external light which has been transmitted through the substrate is reflected by the liquid crystal display, and the reflected light is again transmitted through the substrate to be emitted from the front face. In the case where the front light function is used, light which has been introduced into the substrate from the light source is reflected by the liquid crystal display, and the reflected light is transmitted through the substrate to be emitted from the front face.Type: GrantFiled: August 19, 2003Date of Patent: February 10, 2009Assignee: Fujitsu LimitedInventors: Fumihiko Nakazawa, Hirokazu Aritake
-
Publication number: 20080316187Abstract: Each of transducers of a touch panel device includes a piezoelectric thin film, a plate electrode disposed at one surface of the piezoelectric thin film and a comb-like electrode disposed at the other surface of the piezoelectric thin film. The comb-like electrode has a plurality of comb-like electrode fingers and a linear bus electrode to which one end of each of the plural comb-like electrode fingers is connected. A plurality of wiring electrodes is provided at the outer side of any of the transducers in parallel with the bus electrode of the transducer and is connected to the bus electrode and the plate electrode of any of the transducers. Each of the wiring electrodes includes an electrode base portion formed by printing silver paste containing fine particles on the substrate and an electrode main body formed by printing silver paste containing large particles and fine particles in a mixed manner on the electrode base portion.Type: ApplicationFiled: August 8, 2008Publication date: December 25, 2008Applicant: FUJITSU LIMITEDInventors: Satoshi Sano, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa
-
Publication number: 20080237757Abstract: A micro movable device is made by processing a material substrate of a multilayer structure including a first layer, a second layer having a finely rough region on its surface on the side of the first layer, and an intermediate layer provided between the first and the second layer. The micro movable device includes a first structure formed in the first layer and a second structure formed in the second layer. The second structure includes a portion opposing the first structure via a gap and having a finely rough region on the side of the first structure, and being relatively displaceable with respect to the first structure.Type: ApplicationFiled: March 31, 2008Publication date: October 2, 2008Applicants: FUJITSU LIMITED, FUJITSU MEDIA DEVICES LIMITEDInventors: Hiroaki INOUE, Takashi KATSUKI, Hiroshi ISHIKAWA, Fumihiko NAKAZAWA, Takayuki YAMAJI
-
Patent number: 7423636Abstract: Each of transducers of a touch panel device includes a piezoelectric thin film, a plate electrode disposed at one surface of the piezoelectric thin film and a comb-like electrode disposed at the other surface of the piezoelectric thin film. The comb-like electrode has a plurality of comb-like electrode fingers and a linear bus electrode to which one end of each of the plural comb-like electrode fingers is connected. A plurality of wiring electrodes is provided at the outer side of any of the transducers in parallel with the bus electrode of the transducer and is connected to the bus electrode and the plate electrode of any of the transducers. Each of the wiring electrodes includes an electrode base portion formed by printing silver paste containing fine particles on the substrate and an electrode main body formed by printing silver paste containing large particles and fine particles in a mixed manner on the electrode base portion.Type: GrantFiled: December 22, 2004Date of Patent: September 9, 2008Assignee: Fujitsu LimitedInventors: Satoshi Sano, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa
-
Publication number: 20080210007Abstract: An angular velocity sensor includes: a first tuning-fork vibrator having a first base and first aims extending from the first base in a first direction; a second tuning-fork vibrator having a second bass and second arms extending from the second base in a second direction; and a double gimbal portion mat has a drive gimbal portion vibrating about an axis extending in a fourth direction, and a sense gimbal portion vibrating about an axis extending in a fifth direction and senses an angular velocity about an axis extending in a third direction.Type: ApplicationFiled: January 23, 2008Publication date: September 4, 2008Inventors: Takayuki Yamaji, Hiroshi Ishikawa, Yuji Takahashi, Takashi Katsuki, Fumihiko Nakazawa, Hiroaki Inoue
-
Patent number: 7377166Abstract: A detector is made up of a semiconductor integrated circuit in a part, and the semiconductor integrated circuit includes a driving circuit, an AC amplifier, a detection circuit and an amplifier circuit. An input resistor that is connected to input terminals of an operational amplifier includes an internal input resistor made up of a semiconductor integrated circuit element and an external input resistor made up of an external discrete component connected to each other in parallel. Temperature characteristics of an angular velocity sensor is compensated by a temperature coefficient (?3) that is a combination of a temperature coefficient (?1) of the internal input resistor and a temperature coefficient (?2) of the external input resistor.Type: GrantFiled: April 28, 2006Date of Patent: May 27, 2008Assignees: Fujitsu Limited, Fujitsu Media Devices LimitedInventors: Fumihiko Nakazawa, Masanori Yachi, Toshio Hanazawa
-
Publication number: 20080105051Abstract: A vibration sensor includes a tuning-fork vibrator having a base and arms extending from the base, a mounting portion for mounting the tuning-fork vibrator, and a supporting member that mounts the tuning-fork vibrator on the mounting portion and has a narrow portion.Type: ApplicationFiled: October 12, 2007Publication date: May 8, 2008Inventors: Takayuki Yamaji, Hiroshi Ishikawa, Yuji Takahashi, Takashi Katsuki, Fumihiko Nakazawa, Hiroaki Inoue
-
Publication number: 20080053227Abstract: A vibration sensor includes a tuning-fork vibrator having a base and arms extending from the base, a mounting portion for,mounting the tuning-fork vibrator, and multiple supporting members that mount the tuning-fork vibrator on the mounting portion.Type: ApplicationFiled: August 28, 2007Publication date: March 6, 2008Inventors: Takayuki Yamaji, Hiroshi Ishikawa, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa
-
Patent number: 7324096Abstract: A plurality of excitation elements, each including an IDT and a piezoelectric film, for exciting, respectively, surface acoustic waves, each having a unique center frequency, are formed on one end of a non-piezoelectric substrate, a plurality of receiving elements, each including an IDT and a piezoelectric film, for receiving, respectively, surface acoustic waves, each having a unique center frequency, are formed on the other end of the non-piezoelectric substrate to face the excitation elements, respectively, the center frequencies of the IDTs of the facing excitation element and receiving element are equal, the center frequencies of the IDTs of the excitation elements next to each other are different, and surface acoustic waves are propagated across the non-piezoelectric substrate, between the facing excitation elements and receiving elements so as to detect the position of an object in contact with the non-piezoelectric substrate, based on received results in the receiving elements.Type: GrantFiled: October 23, 2002Date of Patent: January 29, 2008Assignee: Fujitsu LimitedInventors: Fumihiko Nakazawa, Satoshi Sano, Yoshio Satoh, Takashi Matsuda
-
Publication number: 20070277614Abstract: A vibration sensor includes a vibration body, a drive circuit that vibrates the vibration body, a sense circuit that refers to a reference signal associated with a drive signal for the drive circuit and detects a physical state of the vibration body on the basis of a sense signal related to vibration of the vibration body, and a capacitor provided between the drive circuit and ground. The capacitor has a temperature characteristic of a capacitance value defined so as to compensate for at least a part of the temperature characteristic of a sensitivity of the sense signal to the vibration of the vibration body.Type: ApplicationFiled: June 6, 2007Publication date: December 6, 2007Inventors: Yuji Takahashi, Fumihiko Nakazawa, Hiroshi Ishikawa, Masanori Yachi, Takayuki Yamaji, Minoru Ohta
-
Publication number: 20070256496Abstract: An angular velocity sensor includes: first and second tuning-fork vibrators, each of which respectively includes a base portion and multiple arm portions extending from the base portion; and a mounting portion mounting the first and second tuning-fork vibrators, and an end of an arm portion of the first tuning-fork vibrator opposes a side face of the second tuning-fork vibrator; and a first wire connecting the first tuning-fork vibrator and the mounting portion extends in a width direction of the first tuning-fork vibrator.Type: ApplicationFiled: April 18, 2007Publication date: November 8, 2007Inventors: Takayuki Yamaji, Hiroshi Ishikawa, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa, Hiroaki Takagi
-
Publication number: 20070256498Abstract: An angular velocity sensor includes multiple tuning-fork vibrators, each of which respectively includes a base portion and multiple arm portions extending from the base portion, and a difference in length of the arm portions between the multiple tuning-fork vibrators is at least 1 percent of an average of lengths of the multiple arm portions of the multiple tuning-fork vibrators.Type: ApplicationFiled: April 18, 2007Publication date: November 8, 2007Inventors: Takayuki Yamaji, Hiroshi Ishikawa, Akira Imai, Shoji Ogasawara, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa, Hiroaki Takagi
-
Publication number: 20070256497Abstract: An angular velocity sensor includes multiple tuning-fork vibrators, each of which respectively includes a base portion and multiple arm portions extending from the base portion, and a difference in a resonance frequency between the multiple tuning-fork vibrators is at least 2 percent of an average of resonance frequencies of the multiple tuning-fork vibrators.Type: ApplicationFiled: April 18, 2007Publication date: November 8, 2007Inventors: Hiroshi Ishikawa, Takayuki Yamaji, Akira Imai, Shoji Ogasawara, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa, Hiroaki Takagi
-
Publication number: 20070175276Abstract: A detector is made up of a semiconductor integrated circuit in a part, and the semiconductor integrated circuit includes a driving circuit, an AC amplifier, a detection circuit and an amplifier circuit. An input resistor that is connected to input terminals of an operational amplifier includes an internal input resistor made up of a semiconductor integrated circuit element and an external input resistor made up of an external discrete component connected to each other in parallel. Temperature characteristics of an angular velocity sensor is compensated by a temperature coefficient (a3) that is a combination of a temperature coefficient (al) of the internal input resistor and a temperature coefficient (a2) of the external input resistor.Type: ApplicationFiled: April 28, 2006Publication date: August 2, 2007Applicants: FUJITSU LIMITED, FUJITSU MEDIA DEVICES LIMITEDInventors: Fumihiko Nakazawa, Masanori Yachi, Toshio Hanazawa
-
Patent number: 7230612Abstract: Surface acoustic waves are propagated in a lower-left oblique direction and a lower-right oblique direction from an excitation element located on the upper side of a non-piezoelectric substrate and then received by receiving elements located on the left side and the right side, while surface acoustic waves are propagated in an upper-left oblique direction and an upper-right oblique direction from an excitation element located on the lower side of the non-piezoelectric substrate and then received by the receiving elements located on the left side and the right side. Based on the received results at the two receiving elements, a position of an object in contact with the non-piezoelectric substrate is detected.Type: GrantFiled: January 29, 2003Date of Patent: June 12, 2007Assignee: Fujitsu LimitedInventors: Satoshi Sano, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa
-
Publication number: 20070091079Abstract: Surface acoustic waves are propagated in a lower-left oblique direction and a lower-right oblique direction from an excitation element located on the upper side of a non-piezoelectric substrate and then received by receiving elements located on the left side and the right side, while surface acoustic waves are propagated in an upper-left oblique direction and an upper-right oblique direction from an excitation element located on the lower side of the non-piezoelectric substrate and then received by the receiving elements located on the left side and the right side. Based on the received results at the two receiving elements, a position of an object in contact with the non-piezoelectric substrate is detected.Type: ApplicationFiled: November 28, 2006Publication date: April 26, 2007Applicant: FUJITSU LIMITEDInventors: Satoshi Sano, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa
-
Patent number: 7184029Abstract: Each of an excitation element for exciting surface acoustic waves in two directions and a receiving element for receiving surface acoustic waves from two directions is constructed by forming a comb-like electrode on the front surface of a piezoelectric body in the form of a thin film and a plate electrode on the rear surface thereof. The comb-like electrode on the front surface has one line of bus electrode, and a plurality of electrode fingers which are extended from the bus electrode and bent in V-shape in the middle. The voltage in the excitation element and in the receiving element is controlled by providing a terminal resistance for preventing reflection of an applied AC voltage at the terminal end, between the terminal end portion of the comb-like electrode and the plate electrode, or adjusting the resistance value of the bus electrode and/or the plate electrode, or adjusting the capacitance value between the electrode finger and the plate electrode.Type: GrantFiled: November 12, 2003Date of Patent: February 27, 2007Assignee: Fujitsu LimitedInventors: Takashi Katsuki, Fumihiko Nakazawa, Satoshi Sano, Yuji Takahashi
-
Publication number: 20070035016Abstract: A semiconductor device includes a chip having a base semiconductor layer, an insulation layer provided on the base semiconductor layer, and an upper semiconductor layer provided on the insulation layer; a mounting substrate on which the chip is mounted at the base semiconductor layer; and a connecting portion that electrically couples first terminals provided on the mounting substrate and a surface or second terminals provided thereon of the base semiconductor layer.Type: ApplicationFiled: August 8, 2006Publication date: February 15, 2007Inventors: Takayuki Yamaji, Hiroshi Ishikawa, Takashi Katsuki, Yuji Takahashi, Fumihiko Nakazawa, Satoshi Sano