Patents Assigned to NEC
  • Publication number: 20100025839
    Abstract: A leadframe has a die pad, first marks, and second marks, and the die pad allows thereon mounting of a first semiconductor chip. The first marks indicate a mounting region for the first semiconductor chip, the second marks indicate a mounting region for the second semiconductor chip, and the first marks and the second marks are different from each other in at least either one of size and geometry.
    Type: Application
    Filed: July 28, 2009
    Publication date: February 4, 2010
    Applicant: NEC ELECTRONICS CORPORATION
    Inventor: Kenji Nishikawa
  • Publication number: 20100028001
    Abstract: A method includes generating at least two lightwave carriers from a lightwave source, the carriers having a wavelength spacing, creating an up-subchannel and a down-subchannel orthogonal to one another and spaced apart based on the fixed wavelength spacing from modulations of the lightwave carriers according to respective up-converted OFDM signals that are carrier suppressed, and combining one lightwave from the up-subchannel and one lightwave from the down-subchannel into an optical channel for transmission over an optical fiber.
    Type: Application
    Filed: July 31, 2008
    Publication date: February 4, 2010
    Applicant: NEC LABORATORIES AMERICA, INC.
    Inventors: Jianjun Yu, Lei Xu, Philip Nan Ji, Ting Wang, Dayou Qian, Yutaka Yano
  • Publication number: 20100026618
    Abstract: A display device includes a display portion; a signal driver; and a delay control circuit. The display portion is connected to a plurality of signal line groups. The signal driver is connected to the plurality of signal line groups and outputs a plurality of video data groups to the plurality of signal line groups at timings respectively in a single horizontal period. Each of the timings is shifted from an adjacent timing by a predetermined time. The delay control circuit varies the predetermined time every horizontal period and supplies the predetermined time to the signal driver.
    Type: Application
    Filed: July 29, 2009
    Publication date: February 4, 2010
    Applicant: NEC Electronics Corporation
    Inventor: Yoshihiko Hori
  • Publication number: 20100030560
    Abstract: Disclosed is a speech recognition system in which a common data processing means performs speech recognition of a speech captured by a speech input means to generate recognition result hypotheses which is not biased to one of applications and an adaptation data processing means regenerates recognition result hypotheses, using adaptation data and adaptation processing for each application. The adaptation data processing means provides to each application the recognition result recalculated for each application.
    Type: Application
    Filed: March 22, 2007
    Publication date: February 4, 2010
    Applicant: NEC Corporation
    Inventor: Hitoshi Yamamoto
  • Publication number: 20100031142
    Abstract: Disclosed is a summarizing system including a speech input unit, an important portion indication unit, an important section estimation unit, a speech recognition unit, and txt summarization unit. The summarizing system captures a speech section, which is included in a speech received by the speech input unit and includes a portion specified by the important portion indication unit, as a section necessary for a summary. After estimating an appropriate section by the important section estimation unit, the summarizing system recognizes a speech considering the estimated section and performs text summarization.
    Type: Application
    Filed: October 17, 2007
    Publication date: February 4, 2010
    Applicant: NEC CORPORATION
    Inventor: Kentaro Nagatomo
  • Publication number: 20100027359
    Abstract: A circuit for testing an access time of a clock synchronization type memory, includes a delay circuit, a sampling circuit and a coincidence detection circuit. The delay circuit generates a delayed clock obtained by delaying, by a time acceptable for a memory performance, a clock inputted to a memory. The sampling circuit takes in and outputs an output from the memory at the timing of the delayed clock. The coincidence detection circuit detects coincidence or non-coincidence by comparing the output from the sampling circuit with an expected value for the output from the memory.
    Type: Application
    Filed: July 30, 2009
    Publication date: February 4, 2010
    Applicant: NEC ELECTRONICS CORPORATION
    Inventor: Akihiro Banno
  • Publication number: 20100026902
    Abstract: A video signal processing apparatus generates first to third correlation values based on five sequential video line signals C(n?2) to C(n+2) that include two kinds of color-difference signals transmitted line sequentially. The first correlation value indicates degree of similarity between C(n+1) and C(n?1), the second correlation value indicates degree of similarity between C(n+2) and C(n), and the third correlation value indicates degree of similarity between C(n) and C(n?2). When the degree of similarity between C(n+1) and C(n?1) is evaluated to be smaller than a predetermined level based on the first correlation value, the apparatus determines a mixing ratio of C(n+1) and C(n?1) according to relative magnitude of the third correlation value with respect to the second correlation value. The apparatus outputs a mixed signal obtained by mixing the signals C(n+1) and C(n?1) according to the mixing ratio and the video signal C(n) as two simultaneous color-difference signals.
    Type: Application
    Filed: July 8, 2009
    Publication date: February 4, 2010
    Applicant: NEC Electronics Corporation
    Inventor: Kenji Yamashita
  • Publication number: 20100028769
    Abstract: A stacked secondary battery includes battery element including a multilayer structure formed by laying alternately flat plate-shaped positive electrodes and flat plate-shaped negative electrodes by way of separators, the number of the positive electrodes being larger by one than that of the negative electrodes or vice versa, and connecting positive electrode draw-out terminals of the positive electrodes to each other and also negative electrode draw-out terminals of the negative electrodes to each other, plate-shaped metal members respectively arranged on and held in contact with the opposite end surfaces of the multilayer structure as viewed in the stacking direction, binding members binding the plate-shaped metal members so as to pinch and hold the multilayer structure from the end surfaces thereof and a film casing containing the battery element pinched by and held between the plate-shaped metal members in a sealed condition.
    Type: Application
    Filed: July 29, 2009
    Publication date: February 4, 2010
    Applicant: NEC TOKIN CORPORATION
    Inventors: Shinsuke Enomoto, Tomokazu Kumeuchi
  • Patent number: 7655343
    Abstract: A fuel cell (100) which has an electrode-electrolyte joined article (101) composed of a fuel electrode (102), an oxidizing agent electrode (108) and, sandwiched thereby, a solid polymer electrolyte (114), characterized in that a separation film (330) comprising a material exhibiting an oxygen/nitrogen separation factor of more than 1 is provided on the surface of an oxidizing agent electrode side current collector (110) constituting the oxidizing agent electrode (108). The fuel cell is a liquid fuel supply type of fuel cell which has a simple structure and also is capable of supplying satisfactory oxygen to an oxidizing agent electrode.
    Type: Grant
    Filed: September 19, 2003
    Date of Patent: February 2, 2010
    Assignee: NEC Corporation
    Inventors: Takeshi Obata, Tsutomu Yoshitake, Yoshimi Kubo
  • Patent number: 7657248
    Abstract: To provide a wireless system in which a terminal that is shutdown or on in standby can be activated from a remote site in an environment where connection is attested by an authentication server, using security technology for wireless LAN, a different encryption key from other terminals is employed in the communication, and the encryption key is periodically renewed. An access point controls a beacon transmission interval control part by recognizing a terminal activation signal from a management terminal. The beacon transmission interval control part controls the transmission interval of beacon by switching between a normal operation mode and a patterned transmission interval mode. A beacon transmission interval detection circuit of a terminal monitors interval between beacons, and upon detecting patterned beacons, outputs a detection signal. A wireless module receives the detection signal from the beacon transmission interval detection circuit, and then makes an activation request to the terminal.
    Type: Grant
    Filed: August 16, 2005
    Date of Patent: February 2, 2010
    Assignee: Nec Infrontia Corporation
    Inventor: Takeshi Hodoshima
  • Patent number: 7656046
    Abstract: A semiconductor device 1 is a semiconductor device of the BGA type, and includes a semiconductor chip 10, a resin layer 20, an insulating layer 30, and an external electrode pad 40. The resin layer 20 is constituted by a sealing resin 22 and an underfill resin 24, and covers the semiconductor chip 10. The insulating layer 30 is formed on the resin layer 20. The external electrode pad 40 is formed in the insulating layer 30. This external electrode pad 40 extends through the insulating layer 30. One surface S1 of the external electrode pad 40 is exposed in the surface of the insulating layer 30, and the other surface S2 is located in the resin layer 20. A concave portion 45 is formed in the surface S2 of the external electrode pad 40. The resin composing the resin layer 20 enters into the concave portion 45.
    Type: Grant
    Filed: October 5, 2006
    Date of Patent: February 2, 2010
    Assignee: NEC Electronics Corporation
    Inventors: Yoichiro Kurita, Koji Soejima, Masaya Kawano
  • Patent number: 7655965
    Abstract: A semiconductor light receiving device includes a plurality of photodiode units, each of which is configured to convert a received light into an electric signal; and a separating unit configured to electrically separates the plurality of photodiode units from each other. The impurity concentration of a surface portion of the separating unit is equal to or lower than a first concentration. The first concentration is a concentration at which the light receiving sensitivity of the separating unit to light is substantially equal to the light receiving sensitivity of each of the plurality of photodiode units of the light. A wavelength of the light is equal to or longer than that of blue-violet light.
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: February 2, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Nobuyuki Nagashima
  • Patent number: 7656378
    Abstract: A drive circuit that is an example of the present invention is a drive circuit of a display device for outputting in parallel the analog picture signals generated based on the digital picture signals inputted in serial. This circuit comprises a level shift circuit for converting the voltage level of the digital picture signals that were inputted in serial, a D/A conversion circuit for generating analog picture signals based on the digital picture signals that were subjected to level conversion with the level shift circuit, and an expansion circuit connected to the output side of the D/A conversion circuit or between the level shift circuit and the D/A conversion circuit and serving to expand and hold the inputted serial picture signals in parallel and output the picture signals in parallel. The level shift circuit is thus formed in the front stage of the picture signal register circuit.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: February 2, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Yoshiharu Hashimoto
  • Patent number: 7656472
    Abstract: In a light source device, a row of fibers is provided in which a plurality of optical fibers is arrayed in a single row in parallel fashion separately from each other. A light-direction controller is disposed on one side of the optical fibers, main fibers is disposed above and below the light-direction controller, and a main fiber is disposed at the other end of the row of fibers. Light sources are connected to each of the end portions of the main fibers. Three types of mirrors that mutually differ in direction are formed on the surface of the light-direction controller, light emitted from a main fiber enters the optical fibers by way of a first mirror, and light emitted from a main fiber enters the optical fibers by way of a second mirror.
    Type: Grant
    Filed: March 18, 2008
    Date of Patent: February 2, 2010
    Assignee: NEC Corporation
    Inventors: Kenichi Takatori, Ken Sumiyoshi
  • Patent number: 7656940
    Abstract: Filtering part 50 performs filtering by converting a received signal sampled using a predetermined number of over-samples to an over-sample number small enough to avoid frequency-domain foldover noise generation. Transmission channel estimation part 60 performs path timing detection by converting the received signal sampled using a predetermined number of over-samples to an over-sample number large enough to obtain sufficient timing resolution, converts transmission channel responses for each path timing to the frequency domain, and calculates transmission channel estimates corresponding to the subcarriers of the received signal in the frequency domain. Weight calculation part 6 receives the frequency-domain channel estimates outputted from transmission channel estimation part 60 and calculates the weights of the equalizing filter used in filtering part 50.
    Type: Grant
    Filed: June 30, 2006
    Date of Patent: February 2, 2010
    Assignee: NEC Corporation
    Inventors: Masayuki Kimata, Shousei Yoshida
  • Patent number: 7655485
    Abstract: In a method for fabricating a nitride-based semiconductor laser which forms, by a selective deposition, a current narrowing structure and a structure confining a light in a horizontal direction in parallel to a substrate, when the nitride-based semiconductor is selectively deposited by a metal organic chemical vapor deposition, silicon generated by decomposition of the silicon oxide film used as the mask for the selective deposition is prevented from being deposited on a re-growth boundary. For this purpose, a silicon nitride film is used as the mask for the selective deposition, and when the nitride-based semiconductor is selectively deposited by the metal organic chemical vapor deposition, a V-group material of the nitride-based semiconductor, namely, a nitrogen material, for example, ammonia, is supplied so that the decomposition of the silicon nitride film used as the mask for the selective deposition, is prevented.
    Type: Grant
    Filed: November 9, 2007
    Date of Patent: February 2, 2010
    Assignee: NEC Corporation
    Inventor: Akitaka Kimura
  • Patent number: 7657673
    Abstract: A data transfer control device, which transfers a large capacity of data speedily and sequentially, has three buffers that are used as a WR (write) buffer, an intermediate buffer, and an RD (read) buffer. To send data sequentially, the data transfer control device switches-over the buffers in one of the following three ways (A), (B), and (C), using determination flags indicating whether the buffers store effective data (data not yet referenced). A buffer control device switches-over (A) the WR buffer and RD buffer if a WR buffer effective flag 33 is on and an intermediate buffer effective flag 34 and an RD buffer effective flag 35 are off, (B) the WR buffer and the intermediate buffer if the WR buffer effective flag 33 and the RD buffer effective flag 35 are on and the intermediate buffer effective flag 34 is off, and (C) the intermediate buffer and the RD buffer if the intermediate buffer effective flag 34 is on and the RD buffer effective flag 35 is off.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: February 2, 2010
    Assignee: NEC Electronics Corporation
    Inventor: Kenichi Ueda
  • Patent number: 7654207
    Abstract: An XY stage comprises a base, a movable table which is disposed on the base so as to be movable in an X direction and a Y direction in an X-Y plane, and a work member which is provided on the movable table. The XY stage further comprises: a first linear motor for giving a driving force in the X direction to the movable table at the same height as the center of gravity of a movable section composed of the movable table and the work member; and a second linear motor for giving a driving force in the Y direction to the movable table at the same height as the center of gravity of the movable section.
    Type: Grant
    Filed: September 5, 2000
    Date of Patent: February 2, 2010
    Assignee: NEC Corporation
    Inventors: Maho Shoji, Noriyuki Kubota, Junichiro Oishi
  • Patent number: 7657632
    Abstract: A network session is established by a session establishment procedure in accordance with whether or not a difference in priority of session establishment exists among a plurality of terminals for which the network session is to be established. Based on reserved connection information registered in a database, a network administration device for establishing a network session among a plurality of terminals uses a first session establishment procedure that treats all of the terminals in the same manner when there is no difference in the priority of session establishment among the plurality of terminals, and uses a second session establishment procedure that inquires and performs other operations in advance as to whether or not to establish a session with high-priority terminals and treats with priority the terminals of high-priority users when there is a difference in the priority of session establishment.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: February 2, 2010
    Assignee: NEC Corporation
    Inventors: Toshiyasu Nakao, Akitake Mitsuhashi, Atsushi Kashitani
  • Patent number: 7656297
    Abstract: An RFID system of the present invention has a plurality of antennas for reading data from an RFID tag; an antenna configuration storage unit for prestoring a position of each of the plurality of antennas; a position detection unit for detecting a position of the RFID tag; and an antenna control unit for selecting one or more of the antennas that read the RFID tag, based on the position of the RFID tag detected by the position detection unit and on the position of each of the plurality of antennas stored in the antenna configuration storage unit, and for preferentially activating the selected one or more of the antennas.
    Type: Grant
    Filed: March 14, 2007
    Date of Patent: February 2, 2010
    Assignee: Nec Corporation
    Inventors: Makiko Akiguchi, Shohei Takeuchi