Patents Assigned to NEC
  • Patent number: 7692479
    Abstract: In a semiconductor integrated circuit device including a charge pump circuit flowing an operating current therethrough, a current circuit is adapted to receive the operating current and a substantially constant current and generate an inverse current relative to the operating current and the substantially constant current.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: April 6, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Ikuo Fukami
  • Patent number: 7690810
    Abstract: A plurality of LEDs are arrayed in the X-direction, and a light-guide plate is provided facing the LEDs. A plurality of prisms extending in the Y-direction are formed on a light-receiving surface of the light-guide plate. A plurality of prisms are additionally formed on a light-emitting surface of the light-guide plate. Light emitted from the LED is thereby divided into a plurality of light beams by the prisms, and a portion of the light is condensed toward the prisms. Light that is condensed toward the prisms is divided in a plurality of directions and transmitted in the light-guide plate. When the light reaches another prism, the light is reflected by the prism and emitted from the light emitting surface.
    Type: Grant
    Filed: September 13, 2006
    Date of Patent: April 6, 2010
    Assignee: NEC Corporation
    Inventors: Goroh Saitoh, Masao Imai
  • Patent number: 7692297
    Abstract: A reliable semiconductor device including support bumps so as to adequately seal the region between the chips is to be provided. The semiconductor device includes a semiconductor chip; a bump formed on an upper face of the semiconductor chip; and a plurality of support bumps formed along a circumference of the region where the bump is provided, formed on the upper face of the semiconductor chip; and a flow path for a sealing resin is provided between the plurality of support bumps, so as to connect the region where the bump is provided and a periphery region of the semiconductor chip.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: April 6, 2010
    Assignees: NEC Electronics Corporation, NEC Corporation
    Inventors: Takashi Miyazaki, Takuo Funaya
  • Patent number: 7693166
    Abstract: A TOE (TCP/IP Offload Engine) can transmit data to and receive data from a network without causing a plurality of high order processes to influence each other in a computer mounted by a plurality of processors, each of which is mounted by a plurality of cores. The TOE 101 generates a notification queue for each high order process. The TOE driver 102 holds information that tells which high order process corresponds to which socket and which notification queue. When transmitting data, the outgoing data are temporarily held on the transmission buffer queue 102-4 and the transmission buffer is added to the notification queue that corresponds to the relevant high order process after the transmission. When receiving data, the incoming data are stored in the reception buffer on the reception buffer queue 102-3 and the reception buffer is added to the notification queue that corresponds to the relevant high order process.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: April 6, 2010
    Assignee: NEC Corporation
    Inventor: Masatsugu Matsuura
  • Patent number: 7690797
    Abstract: A transportable projector includes a focus adjustment unit for moving a focus lens in a projection lens, an acceleration sensor for detecting acceleration in a direction along an optical axis of the projection lens in the projector, a determination unit for determining whether the projector is in a stationary state or in a moving state in accordance with an output of the acceleration sensor and for respectively determining the direction to which the projector has moved and the distance that the projector has moved in accordance with an output of the acceleration sensor, and a control unit for controlling movement of the focus lens by the focus adjustment unit in accordance with the determined direction and the determined distance of the projector.
    Type: Grant
    Filed: June 6, 2006
    Date of Patent: April 6, 2010
    Assignee: Nec Viewtechnology, Ltd.
    Inventor: Hideaki Higashi
  • Patent number: 7692306
    Abstract: In the conventional technology, a region of larger data rate causes a varied level of the light exposure in the lithographic operation in the process for manufacturing the semiconductor device, causing a problem of allowing narrower process window. A semiconductor device includes interconnects (first interconnects) elongating along a first direction in a substrate surface of the substrate (transverse direction in the diagram), interconnects (second interconnects), elongating along the interconnects, and being spaced apart from the interconnects in plan view, and slit vias (slit-shaped via plugs), elongating along a second direction (longitudinal direction in the diagram) of directions in the substrate surface of the above-described substrate, which is a direction normal to the first direction, and being capable of electrically coupling the interconnect to the interconnect.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: April 6, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Yoshihisa Matsubara
  • Patent number: 7692988
    Abstract: A semiconductor device (DRAM) according to one embodiment of the present invention includes a plurality of pairs of digit lines (digit True, Not) connected to a memory cell, a common signal line pair (main I/O True, Not) connected to the plurality of pairs of digit lines in common, a main I/O equalizer performing precharge of the common signal line pair, and a control circuit determining whether the precharge operation is continued irrespective of a signal level of a mask signal input from an outside.
    Type: Grant
    Filed: July 8, 2008
    Date of Patent: April 6, 2010
    Assignee: NEC Electronics Corporation
    Inventors: Takao Yanagida, Takuya Hirota
  • Patent number: 7694087
    Abstract: Provided is a data storing system which holds only updated data by a snapshot action of a disk array subsystem. When there is generated a writing request to snapshot duplicate volumes as the duplicate data storing areas, unused pages for the requested amount is searched from a common logical-volume which is used in common as a real data storage area within the disk array subsystem, and address conversion of the page is performed. The result of the address conversion is held in a directory which is provided for each of the snapshot duplicate volumes. When making an access to the page thereinafter, the directory is always being referred to, and the address conversion is performed from the page of the snapshot duplicate volumes to the corresponding page of the common logical-volume.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: April 6, 2010
    Assignee: NEC Corporation
    Inventor: Naoki Soeda
  • Patent number: 7694172
    Abstract: A data backup device according to the present invention comprises a first table, a second table, an update management part configured to perform recording in the second table an identifier of updated portion of a first memory, a table rewriting part configured to perform rewriting the first table such that the first table identifies the portion of the first memory identified by the second table, and a data copy control part configured to perform output of first data from the portion of the first memory identified by the first table.
    Type: Grant
    Filed: March 2, 2007
    Date of Patent: April 6, 2010
    Assignee: NEC Corporation
    Inventor: Kenji Hasegawa
  • Patent number: 7693690
    Abstract: A symbolic disjunctive image computation method for software models which exploits a number of characteristics unique to software models. More particularly, and according to our inventive method, the entire software model is decomposed into a disjunctive set of submodules and a separate set of transition relations are constructed. An image/reachability analysis is performed wherein an original image computation is divided into a set of image computation steps that may be performed on individual submodules, independently from any others. Advantageously, our inventive method exploits variable locality during the decomposition of the original model into the submodules. By formulating this decomposition as a multi-way hypergraph partition problem, we advantageously produce a small set of submodules while simultaneously minimizing the number of live variable in each individual submodule.
    Type: Grant
    Filed: March 3, 2006
    Date of Patent: April 6, 2010
    Assignee: NEC Laboratories America, Inc.
    Inventors: Chao Wang, Aarti Gupta, Zijiang Yang, Franjo Ivancic
  • Patent number: 7692772
    Abstract: A laser distance measuring apparatus which measures a turnaround time after emitting a laser beam outputted from a laser diode to a target until receiving the laser beam reflected by the target by a light receiving module via a band-pass filter to calculate a distance to the target, includes temperature control module for adjusting a temperature of the laser diode; level detecting module for detecting a level of the reflected laser beam received via the band-pass filter; main control module for outputting a temperature control signal to the temperature control module so that the level is kept in a predetermined range.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: April 6, 2010
    Assignee: NEC Corporation
    Inventor: Teiji Kase
  • Patent number: 7693293
    Abstract: Provided is a sound processing device including: a sound input unit for dividing an input sound into predetermined time units; a sound processing unit for encoding the input sound thus divided; a noise detecting unit; and an output control unit for replacing encoded data on the input sound with silent data according to detection results of the noise detecting unit. Also provided is an input sound processing method including: encoding an input sound; judging whether or not the input sound contains a noise; and replacing a noise portion contained in the encoded input sound with silent data.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: April 6, 2010
    Assignee: NEC Corporation
    Inventors: Miyako Nemoto, Satoshi Hosokawa
  • Patent number: 7692287
    Abstract: A wiring board (20A) includes a first wiring portion (10A) having a plurality of wiring layers (1) and external connecting bumps (5), and at least one second wiring portion (15A) having a plurality of contact plugs (14). The second wiring portion is integrated with the first wiring portion such that each terminal (14a) of the second wiring portion is in direct contact with one of the wiring layers of the first wiring portion. Hence, there is no risk to produce an internal stress caused by the diffused component of the solder bump in the junction portion between the second and first wiring portions. Accordingly, even when a semiconductor chip (30) of a low-k material is highly integrated on the wiring board, a highly reliable semiconductor device (50) can be obtained.
    Type: Grant
    Filed: May 18, 2005
    Date of Patent: April 6, 2010
    Assignee: NEC Corporation
    Inventor: Masamoto Tago
  • Patent number: 7693214
    Abstract: Disclosed is a receiving device which comprises first and second AD converters for inputting a received analog signal and converting the analog signal to digital signals in response to sampling clock signals of mutually different phases, first and second adaptive equalizers for respectively receiving outputs of the first and second AD converters, third and fourth adaptive equalizers for respectively receiving outputs of the second and first AD converters, a first adder for adding the outputs of the first and second adaptive converters, a second adder for adding the outputs of the third and fourth adaptive equalizers, a first decision unit for receiving the output of the first adder, deciding a received symbol for output, and outputting a decision error, a second decision unit for receiving the output of the second adder, deciding a received symbol for output, and outputting a decision error, and a multiplexing circuit for multiplexing the received symbols output from the first and second decision units, for o
    Type: Grant
    Filed: June 2, 2005
    Date of Patent: April 6, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Yasunari Shida
  • Patent number: 7692190
    Abstract: The semiconductor device has a fuse and a fuse opening created above the fuse. The fuse is divided into a plurality of lines at a crossing portion where the fuse crosses with an edge of the fuse opening. The plurality of divided lines of the fuse 101 are in parallel with each other and in perpendicular to the edge of the fuse opening.
    Type: Grant
    Filed: May 15, 2006
    Date of Patent: April 6, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Nobuyuki Katsuki
  • Patent number: 7693098
    Abstract: A method for controlling the communication with mobile stations in a network, preferably in a WLAN (Wireless Local Area Network) according to the IEEE 802.11 standard, wherein the network comprises access points through which the mobile stations are associated with the network and wherein the mobile stations can be set to power save mode is—with respect to an especially energy-efficient operation of the mobile station-designed in such a way that paging signaling is performed in order to locate a mobile station.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: April 6, 2010
    Assignee: NEC Corporation
    Inventors: Xavier Perez Costa, Marco Liebsch
  • Patent number: 7692237
    Abstract: Provided is a highly reliable multi-bit memory cell capable of miniaturization including: a semiconductor substrate with a channel formed therein; diffusion layers arranged at two sides of the channel, for serving as source/drain; an insulating film arranged on a part of the channel; a trap film made of an insulating material having an electron trapping characteristic, arranged on the semiconductor substrate, the diffusion layers and the insulating film, and including trap regions each capable of trapping electrons in at least areas in contact with the semiconductor substrate at two sides of the insulating film; and a gate electrode arranged on the trap film. The trap regions are also formed on side surfaces of the insulating film, and the trap film has a structure in which the trap film is bent upward from the surface of the semiconductor substrate in the trap regions due to the insulating film.
    Type: Grant
    Filed: August 21, 2007
    Date of Patent: April 6, 2010
    Assignee: Nec Electronics Corporation
    Inventor: Kohji Kanamori
  • Patent number: 7693360
    Abstract: On the back surface of a transparent plate having a light extracting part for outputting lights to the outside, an electrode for wiring, and an electrode for an electromagnetic shield, an optical device is flip-chip mounted right under the light extracting part, an a driver IC is flip-chip mounted at a desired position with metal bumps. When currents driving the optical device flow from the driver IC according to an electric logical signal from the outside, an optical signal is emitted from the optical device, and is output to the outside through the light extracting part. The light extracting part may be provided with a light coupling material or an optical axis converter.
    Type: Grant
    Filed: April 18, 2003
    Date of Patent: April 6, 2010
    Assignee: NEC Corporation
    Inventors: Takanori Shimizu, Takara Sugimoto, Jun-ichi Sasaki, Kazuhiko Kurata
  • Patent number: 7692978
    Abstract: A semiconductor device includes a first memory; and a voltage adjusting portion configured to receive a first voltage, a second voltage higher than the first voltage, and a third voltage higher than the second voltage. The first memory includes: a memory cell configured to be connected to a word line and a bit line, a word-line driving circuit configured to drive the word line, and a sense amplifier configured to sense information stored in the memory cell. The voltage adjusting portion includes: a voltage modifying circuit configured to step down or boost up the third voltage at a predetermined mode to generate a fourth voltage higher than the second voltage, and supply the fourth voltage to the sense amplifier or the word-line driving circuit.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: April 6, 2010
    Assignee: NEC Electronics Corporation
    Inventors: Hiroyuki Takahashi, Atsushi Nakagawa
  • Patent number: 7692265
    Abstract: There is provided a semiconductor device excellent in reliability. The semiconductor device is comprised of a semiconductor substrate, an insulating portion having a multilayer insulating film composed of an etch stopper film, an insulating film, an etch stopper film, an insulating film, an etch stopper film and an insulating film provided on an upper portion of the semiconductor, fuses provided on the insulating portion, and a seal ring composed of a copper containing metal film, a barrier metal film, a copper containing metal film and a barrier metal film embedded in the insulating portion so as to surround a region just below the fuses.
    Type: Grant
    Filed: March 31, 2005
    Date of Patent: April 6, 2010
    Assignee: NEC Electronics Corporation
    Inventors: Toshiyuki Takewaki, Noriaki Oda