Patents by Inventor Naoki Tatsumi

Naoki Tatsumi 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: 8523391
    Abstract: A flat light source apparatus has a light source board which comprises unit boards, each unit board having a printed circuit board and a light source formed on the printed circuit board, wherein the unit boards are arranged adjacent to each other at least in one direction, and any pair of the unit boards adjacent to each other is integrated by a connecting portion provided therebetween. The apparatus also has a main wire which extends along a plane of the light source board, wherein the main wire extends between adjacent unit boards via the connecting portion such that all of the unit boards are electrically connected to each other by the main wire. The apparatus further has a branch wire for supplying electric power to the light source, the branch wire being provided in each unit board and branching from the main wire in each unit board.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: September 3, 2013
    Assignee: NEC Corporation
    Inventors: Masahiro Ishizuka, Katsuyuki Okimura, Yoshinori Ueji, Ryuichiro Morinaka, Naoki Tatsumi, Tomoyuki Fukuda
  • Patent number: 8479274
    Abstract: Provided is a personal verification device capable of easily performing personal verification of a user. In the device, under the condition that a user grasps a case (110) of a game controller (10), a vibration control unit (152) causes a vibration motor (120) arranged inside of the case (110) to vibrate in different patterns. A triaxial acceleration sensor (140) detects vibration generated by the vibration motor (120) which vibrates in the different patterns, and a storage unit (153) stores a plurality of pieces of measurement data obtained by the detection for each of the users. A determination unit (154) performs the personal verification by comparing and collating the data in the storage unit (153) with the measurement data obtained by vibrating the vibration motor (120) under the condition that the user grasps the case (110).
    Type: Grant
    Filed: April 23, 2010
    Date of Patent: July 2, 2013
    Assignee: Mitsumi Electric Co., Ltd
    Inventors: Kenichi Furukawa, Shinji Hirabayashi, Naoki Tatsumi, Minenori Nagasaka, Yoshihiro Sakanushi
  • Publication number: 20120028710
    Abstract: Provided is a personal verification device capable of easily performing personal verification of a user. In the device, under the condition that a user grasps a case (110) of a game controller (10), a vibration control unit (152) causes a vibration motor (120) arranged inside of the case (110) to vibrate in different patterns. A triaxial acceleration sensor (140) detects vibration generated by the vibration motor (120) which vibrates in the different patterns, and a storage unit (153) stores a plurality of pieces of measurement data obtained by the detection for each of the users. A determination unit (154) performs the personal verification by comparing and collating the data in the storage unit (153) with the measurement data obtained by vibrating the vibration motor (120) under the condition that the user grasps the case (110).
    Type: Application
    Filed: April 23, 2010
    Publication date: February 2, 2012
    Inventors: Kenichi Furukawa, Shinji Hirabayashi, Naoki Tatsumi, Minenori Nagasaka, Yoshihiro Sakanushi
  • Patent number: 7781982
    Abstract: In a low-voltage power supply circuit for illumination that rectifies an ac power supply by means of a rectifier circuit, that controls this rectified output by means of a power-factor control circuit, and that supplies a low-voltage power supply for illumination, the power-factor control circuit is composed of a step-down circuit and is further provided with a current-limiting capability.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: August 24, 2010
    Assignee: NEC Lighting, Ltd
    Inventor: Naoki Tatsumi
  • Patent number: 7240872
    Abstract: A pair of disk-shaped annular flanges is made of material firmer than that of a hollow cylindrical-shaped roller portion. The roller portion has an outer peripheral surface in which the flanges are mounted at opposite ends thereof. On press-fitting a pair of bearings in the roller portion, the flanges are retained by means of bearing flanges. The outer peripheral surface of the roller portion has a pair of flange guides, at opposite ends thereof, for guiding the flanges. The flange guide has a longitudinal length shorter than thickness of the flange. An adhesive agent may be filled in a gap formed among an end surface of the roller portion, the disk-shaped annular flange, and the bearing.
    Type: Grant
    Filed: January 30, 2006
    Date of Patent: July 10, 2007
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Hiromi Inoguchi, Nobutaka Tsuneyoshi, Kouji Kobayashi, Naoki Tatsumi
  • Publication number: 20070152604
    Abstract: In a low-voltage power supply circuit for illumination that rectifies an ac power supply by means of a rectifier circuit, that controls this rectified output by means of a power-factor control circuit, and that supplies a low-voltage power supply for illumination, the power-factor control circuit is composed of a step-down circuit and is further provided with a current-limiting capability.
    Type: Application
    Filed: September 15, 2006
    Publication date: July 5, 2007
    Inventor: Naoki Tatsumi
  • Publication number: 20060238910
    Abstract: An ejection position detection mechanism has an arc-shaped plate, attached to a mode gear, having a plurality of detected elements provided at positions corresponding to a plurality of ejection positions of a cartridge, and a detection arrangement, disposed near to the arc-shaped plate, for detecting the plurality of detected elements. The arc-shaped plate consists of a shielding plate. The plurality of detected elements consist of an edge of the shielding plate and two slits formed on the shielding plate. The detecting arrangement consists of a photo-interrupter.
    Type: Application
    Filed: January 31, 2006
    Publication date: October 26, 2006
    Applicant: Mitsumi Electric Co. Ltd.
    Inventors: Kouji Kobayashi, Nobutaka Tsuneyoshi, Hiromi Inoguchi, Naoki Tatsumi
  • Publication number: 20060231661
    Abstract: A pair of disk-shaped annular flanges is made of material firmer than that of a hollow cylindrical-shaped roller portion. The roller portion has an outer peripheral surface in which the flanges are mounted at opposite ends thereof. On press-fitting a pair of bearings in the roller portion, the flanges are retained by means of bearing flanges. The outer peripheral surface of the roller portion has a pair of flange guides, at opposite ends thereof, for guiding the flanges. The flange guide has a longitudinal length shorter than thickness of the flange. An adhesive agent may be filled in a gap formed among an end surface of the roller portion, the disk-shaped annular flange, and the bearing.
    Type: Application
    Filed: January 30, 2006
    Publication date: October 19, 2006
    Applicant: Mitsumi Electric Co. Ltd.
    Inventors: Hiromi Inoguchi, Nobutaka Tsuneyoshi, Kouji Kobayashi, Naoki Tatsumi
  • Publication number: 20060221608
    Abstract: A flat light source apparatus has a light source board which comprises unit boards, each unit board having a printed circuit board and a light source formed on the printed circuit board, wherein the unit boards are arranged adjacent to each other at least in one direction, and any pair of the unit boards adjacent to each other is integrated by a connecting portion provided therebetween. The apparatus also has a main wire which extends along a plane of the light source board, wherein the main wire extends between adjacent unit boards via the connecting portion such that all of the unit boards are electrically connected to each other by the main wire. The apparatus further has a branch wire for supplying electric power to the light source, the branch wire being provided in each unit board and branching from the main wire in each unit board.
    Type: Application
    Filed: February 3, 2006
    Publication date: October 5, 2006
    Inventors: Masahiro Ishizuka, Katsuyuki Okimura, Yoshinori Ueji, Ryuichiro Morinaka, Naoki Tatsumi, Tomoyuki Fukuda
  • Patent number: 6922306
    Abstract: A tape recording and reproduction apparatus includes a post base with a tape guide post, a leaf spring member pressing the post base against a post base catcher, and a leaf spring member control part. The leaf spring member control part presses the leaf spring member so that a gap is formed between the post base catcher and the leaf spring member, and removes the press on the leaf spring member so that the leaf spring member presses the post base against the post base catcher. The leaf spring member control part presses the leaf spring member so as to form the gap when the post base moves to the side of the post base catcher opposing the leaf spring member. The leaf spring member control part removes the press on the leaf spring member when the post base enters the gap.
    Type: Grant
    Filed: August 28, 2003
    Date of Patent: July 26, 2005
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Nobutaka Tsuneyoshi, Naoki Tatsumi, Koichi Shimoyama
  • Patent number: 6885516
    Abstract: A magnetic recording and reproduction apparatus includes a tape loading mechanism including a driving ring gear member, first and second ring gear members for shifting first and second tape guide posts, respectively, and first, second, and third gear members engaging the driving ring gear member and the first and second ring gear members, respectively. Each of the first through third gear members includes a gear part and a cam part in the same plane. The cam part of the first gear member has an arcuate shape. The cam part of the second gear member engages the cam part of the third gear member so as to transmit rotation during the operation of the tape loading mechanism, and is pressed against the circumferential surface of the arcuate cam part of the first gear member in a state where the operation of the tape loading mechanism is completed.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: April 26, 2005
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Nobutaka Tsuneyoshi, Naoki Tatsumi, Koichi Shimoyama
  • Publication number: 20040061971
    Abstract: A tape recording and reproduction apparatus includes a post base with a tape guide post, a leaf spring member pressing the post base against a post base catcher, and a leaf spring member control part. The leaf spring member control part presses the leaf spring member so that a gap is formed between the post base catcher and the leaf spring member, and removes the press on the leaf spring member so that the leaf spring member presses the post base against the post base catcher. The leaf spring member control part presses the leaf spring member so as to form the gap when the post base moves to the side of the post base catcher opposing the leaf spring member. The leaf spring member control part removes the press on the leaf spring member when the post base enters the gap.
    Type: Application
    Filed: August 28, 2003
    Publication date: April 1, 2004
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Nobutaka Tsuneyoshi, Naoki Tatsumi, Koichi Shimoyama
  • Patent number: 6678111
    Abstract: A magnetic tape recording/reproducing apparatus for recording information to and reproducing information from a magnetic tape extracted from a cassette loaded in the apparatus, the magnetic tape recording/reproducing apparatus having a tape guide post mechanism having a tape guide post provided on a rotatably supported tape guide post arm which rotates until pressing against a stopper, the tape guide post extracting a magnetic tape from the cassette loaded in the apparatus; and a contacting part provided on a portion of the arm, the contacting part contacting a bottom surface of the loaded cassette when the arm is rotated so as to extract the magnetic tape from the cassette and the arm restricting a tilting of the arm in a direction in which the tape guide post tilts in a state in which the arm presses against the stopper.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: January 13, 2004
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Naoki Tatsumi, Kazuya Tamura, Masahiro Harima
  • Publication number: 20030235004
    Abstract: An intermittent gear member, which intermittently rotates alternately in first and second opposite rotational directions within an angular range of 360° or less, includes a disk part, a gear part formed over a predetermined angular range on the circumferential surface of the disk part, and a rotation stopper cam part formed on the toothless part of the circumferential surface of the disk part so as to protrude therefrom, the toothless part corresponding to the range other than the range over which the gear part is formed. The gear part and the rotation stopper cam part are provided in the same plane.
    Type: Application
    Filed: June 5, 2003
    Publication date: December 25, 2003
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Nobutaka Tsuneyoshi, Naoki Tatsumi, Koichi Shimoyama
  • Publication number: 20030235003
    Abstract: A magnetic recording and reproduction apparatus includes a tape loading mechanism including a driving ring gear member, first and second ring gear members for shifting first and second tape guide posts, respectively, and first, second, and third gear members engaging the driving ring gear member and the first and second ring gear members, respectively. Each of the first through third gear members includes a gear part and a cam part in the same plane. The cam part of the first gear member has an arcuate shape. The cam part of the second gear member engages the cam part of the third gear member so as to transmit rotation during the operation of the tape loading mechanism, and is pressed against the circumferential surface of the arcuate cam part of the first gear member in a state where the operation of the tape loading mechanism is completed.
    Type: Application
    Filed: June 2, 2003
    Publication date: December 25, 2003
    Applicant: MITSUMI ELECTRIC CO., LTD.
    Inventors: Nobutaka Tsuneyoshi, Naoki Tatsumi, Koichi Shimoyama
  • Patent number: 6634535
    Abstract: A roller shaft (10) is provided which includes a shaft portion (12) of a substantially solid cylindrical shape and a flange portion (14) of a disk-like shape. The shaft portion (12) includes a hollow cylindrical portion (121) having a substantially hollow cylindrical shape and formed at a lower end (10a) side. The hollow cylindrical portion has an inner peripheral surface with a female screw (12a) formed thereon. A D-shaped cut (122) may be provided on an outer peripheral wall of the hollow cylindrical portion for positioning the roller shaft (10) with respect to the chassis (32) and for preventing the roller shaft from rotating around the chassis, or a D-shaped cut (141) or a slot (142) may be formed in the flange portion (14).
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: October 21, 2003
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Naoki Tatsumi, Kazuya Tamura
  • Patent number: 6592063
    Abstract: A method of confirming that chucking between a supply leader tape (20) and a take-up leader tape (10A) is properly carried out comprises a step of confirming whether or not the chucking is properly carried out and a step of reconfirming whether or not the chucking is properly carried out. The reconfirming step is carried out at least once.
    Type: Grant
    Filed: October 2, 2001
    Date of Patent: July 15, 2003
    Assignees: Mitsumi Electric Co., Ltd., Benchmark Storage Innovations Inc.
    Inventors: Naoki Tatsumi, Kazuya Tamura, Jimmy Zweighaft
  • Publication number: 20030062437
    Abstract: A method of confirming that chucking between a supply leader tape (20) and a take-up leader tape (10A) is properly carried out comprises a step of confirming whether or not the chucking is properly carried out and a step of reconfirming whether or not the chucking is properly carried out. The reconfirming step is carried out at least once.
    Type: Application
    Filed: October 2, 2001
    Publication date: April 3, 2003
    Applicant: Mitsumi Electric Co. Ltd.
    Inventors: Naoki Tatsumi, Kazuya Tamura, Jimmy Zweighaft
  • Publication number: 20030062393
    Abstract: In a roller shaft (10) comprising a shaft portion (12) of a substantially solid cylindrical shape and a flange portion (14) of a disk-like shape, the shaft portion (12) comprises a hollow cylindrical portion (121) having a substantially hollow cylindrical shape and formed at a lower end (10a) side. The hollow cylindrical portion has an inner peripheral surface with a female screw (12a) formed thereon. As positioning and rotation preventing means for positioning the roller shaft (10) with respect to the chassis (32) and for preventing the roller shaft from rotating around the chassis, a D-shaped cut (122) is provided on an outer peripheral wall of the hollow cylindrical portion at one place thereof. The positioning and rotation preventing means may comprise a D-shaped cut (141) or a slot (142) formed in the flange portion (14) at one place thereof.
    Type: Application
    Filed: October 2, 2001
    Publication date: April 3, 2003
    Applicant: Mitsumi Electric Co. Ltd.
    Inventors: Naoki Tatsumi, Kazuya Tamura
  • Patent number: 6481045
    Abstract: A capstan shaft cleaning device has a cleaning member removing dirt attached to a capstan shaft and a moving mechanism moving the cleaning member between a position at which the cleaning member contacts the capstan shaft and a position at which the cleaning member is separated from the capstan shaft, the cleaning member having at least two points of contact contacting a periphery of the capstan shaft.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: November 19, 2002
    Assignee: Mitsumi Electric Co., Ltd.
    Inventors: Kazuya Tamura, Masahiro Harima, Naoki Tatsumi