Patents Assigned to NEC Engineering Ltd.
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Patent number: 9491096Abstract: A switching process includes an SRAM/CAM storing registration data including a forwarding database used for packet-forwarding and a DRAM storing packet data. The registration data including the forwarding database of the SRAM/CAM for packet-forwarding is stored into the DRAM as a copy of the registration data, and the registration data of the DRAM is used to refresh the registration data of the SRAM/CAM for a predetermined time interval. A data error in the SRAM/CAM caused by a soft-error is rewritten to normal data by periodical refreshing so that data is guaranteed with relatively low cost and the reliability of the network apparatus is improved.Type: GrantFiled: March 29, 2012Date of Patent: November 8, 2016Assignees: NEC CORPORATION, NEC ENGINEERING LTD.Inventors: Koichi Tsuchiya, Yutaka Takekoshi
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Patent number: 8727292Abstract: An angle adjustment device, include a fixed portion; a movable portion; a connection portion which rotatably connects the movable portion to the fixed portion; and an elastic member which is arranged between the movable portion and the fixed portion and restricts rotational movement of the movable portion with kinetic friction generated between the movable portion and the fixed portion.Type: GrantFiled: April 11, 2012Date of Patent: May 20, 2014Assignees: NEC Access Technica, Ltd., NEC Engineering Ltd.Inventors: Namie Sugiyama, Keisuke Hatomi
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Patent number: 8405704Abstract: A TV conference apparatus includes a main body, a plurality of monitors, arms for connecting the monitors to the main body such that they are free to turn about a vertical axis, and a camera disposed to an upper portion of the main body to pick up an image of an entire circumference. The plurality of monitors and the camera are disposed integrally with the main body. The TV conference apparatus can switch a first state, in which the plurality of monitors are disposed forward of the main body in line with each other, with a second state, in which the plurality of monitors are disposed sideward of the main body.Type: GrantFiled: September 25, 2007Date of Patent: March 26, 2013Assignee: NEC Engineering Ltd.Inventors: Osamu Kobayashi, Norikazu Hagiya, Terumasa Takahashi
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Patent number: 8086259Abstract: A radio communication apparatus includes a control unit for conducting modulation scheme changeover control to change a modulation scheme according to a state of a transmission path and automatic transmitter power control to control a transmission level of another radio communication apparatus to set a reception level of a reception signal to be received by the own apparatus to a predetermined value, wherein the control unit controls, when a changeover is conducted from a first modulation scheme to a second modulation scheme under the modulation scheme changeover control, to keep the transmission level of another radio communication apparatus at a predetermined value under the automatic transmitter power control and conducts, when resetting is conducted from the second modulation scheme to the first modulation scheme under the modulation scheme changeover control, at least one of transmission level reduction control to stepwise lower by a predetermined value the transmission level kept at the predetermined vaType: GrantFiled: April 18, 2007Date of Patent: December 27, 2011Assignees: NEC Corporation, NEC Engineering Ltd.Inventors: Eisaku Sasaki, Kazuhito Souma
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Publication number: 20100252988Abstract: An automatic document conveyance device, include a paper guide which has a slot formed by cutting off a part of a conveyance surface for guiding a document; a conveyance unit which inserts in and detach from the slot; wherein the conveyance unit further comprising: a motor which generates driving force; a motor holding part which holds the motor; a driving roller which conveys a document; a drive transmission mechanism which transmits the driving force generated by the motor to the driving roller via a driving roller shaft; and a fitting part which fits the conveyance unit into the slot so that one surface of the conveyance unit forms the conveyance face.Type: ApplicationFiled: March 31, 2010Publication date: October 7, 2010Applicants: NEC Access Technica, Ltd., NEC Engineering Ltd.Inventors: Noriyuki HAGIYAMA, Hiroyuki OKADA
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Publication number: 20080079800Abstract: A TV conference apparatus includes a main body, a plurality of monitors, arms for connecting the monitors to the main body such that they are free to turn about a vertical axis, and a camera disposed to an upper portion of the main body to pick up an image of an entire circumference. The plurality of monitors and the camera are disposed integrally with the main body. The TV conference apparatus can switch a first state, in which the plurality of monitors are disposed forward of the main body in line with each other, with a second state, in which the plurality of monitors are disposed sideward of the main body.Type: ApplicationFiled: September 25, 2007Publication date: April 3, 2008Applicant: NEC ENGINEERING LTD.Inventors: Osamu KOBAYASHI, Norikazu Hagiya, Terumasa Takahashi
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Patent number: 6891445Abstract: In response to changes in an input binary digital signal, a 3rd order cosine pulse waveform, which, when it is changed in the increasing direction, has “0” level in a first period of T/12 (T corresponding to one-half cycle of the binary digital signal), is changed as a waveform of (h/2)(1+cos(3?t/T)+?/4) in the next period of 4T/12 (?5T/12?t??T/12) and has an h (constant) level in the remaining period of T/12, and when it is changed in the reducing direction, has the h level in the first period of T/12, is changed as a waveform of (h/2)(1+cos(3?t/T)??/4) in the next period of 4T/12 (T/12?t?5T/12) and also has “0” level in the remaining period of T/12. By using this pulse wave, a flat part is generated in a time width of T/12 with respect to a judgment point. It is thus possible to improve the immunity to the effects of digital signal jitter, obtain change judgment with a sole single pulse and reduce the circuit scale and the power consumption.Type: GrantFiled: June 11, 2003Date of Patent: May 10, 2005Assignee: NEC Engineering Ltd.Inventors: Noboru Kusama, Katsuya Kitada, Masahiro Akiyama, Takashi Nakagawa, Noriko Sato
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Patent number: 6801694Abstract: A face alignment device of the present invention comprises two units that are each provided with: a convex semi-spherical block having a contact surface that makes contact with a clamp member for securing an object and a convex semi-spherical surface on the opposite side of the contact surface; and a base block having a concave portion corresponding to the semi-spherical surface of the convex semi-spherical block for rotatably holding the convex semi-spherical block, wherein the two units are arranged such that their contact surfaces face each other. The clamp member is attached to the contact surfaces of the respective units at eccentric positions from the center axes of the convex semi-spherical blocks. This is advantageous since a load required for rotational sliding between each of the semi-spherical surfaces of the convex semi-spherical blocks and each of the concave portions of the base blocks can be small.Type: GrantFiled: February 26, 2002Date of Patent: October 5, 2004Assignee: NEC Engineering Ltd.Inventor: Kiyomitsu Ishimura