Patents Represented by Attorney, Agent or Law Firm J. Warren Whitesel
  • Patent number: 6562510
    Abstract: A battery power supply system consisting of battery card, battery card assembly where battery card slots in, and charger where battery card gets recharged is disclosed. The standardized battery card is designed in light, thin, safe, and user-friendly card configuration to make interchangeability between appliances easy and possible. The battery card assembly is designed either for single or multiple battery cards. In the case of using single battery card, the battery card assembly electrically connects to a power buffer in the electrical apparatus so the user can change their battery card without turning off the electrical apparatus within a certain time interval. In the case of multiple battery cards, the battery card assembly connects power to the electrical apparatus from only one of the battery cards. Until the first battery card is completely discharged, the battery card assembly automatically switches to another battery card without disturbing the electrical apparatus operation.
    Type: Grant
    Filed: July 14, 1999
    Date of Patent: May 13, 2003
    Inventors: Cyril C. K. Chiang, Min Hon Rei
  • Patent number: 6527568
    Abstract: A card connector comprising a U-shape frame of a pair of guide arms of synthetic resin, a metallic bridge connecting the guide arms to each other to form a U-shape, and a connector part fit to the U-shape frame beneath the metallic bridge. A lever and a slider plate of an eject mechanism are mounted on the bridge. One of the guide arms is provided with an ejector button to be slidable thereon. In order to prevent the PC card from inserting into the card connector with a state where the PC card is reversed in front and rear and/or upside down, one of the guide arms is formed with a thin polarity key and the other of the guide arms is formed with a thick polarity key. Both the guide arms are symmetrically constituted except the polarity keys and are replaceable to each other.
    Type: Grant
    Filed: July 30, 1999
    Date of Patent: March 4, 2003
    Assignee: Japan Aviation Electronics Industry, Limited
    Inventor: Keisuke Nakamura
  • Patent number: 6504334
    Abstract: In circuitry for driving a motor 9 by PWM (Pulse Width Modulation) control. a pulse sequence Spwm is generated on the basis of a triangular wave TR that is control led by a capacitor. The pulses of the pulse sequence Spwm are counted in synchronism with position signals U1, V1 and W1 output from position sensing means, which is responsive to the angular positions of the motor 9, so that a duty modulation signal Sduty-b is generated for reducing noise ascribable to the rotation of the motor 9. An exciting pulse generating circuit 8 switches a MOSFET (Metal Oxide Semiconductor Field Effect Transistor) circuit 11 with gate signals Q1P through Q3P and Q1N through Q3N.
    Type: Grant
    Filed: April 13, 2001
    Date of Patent: January 7, 2003
    Assignee: NEC Corporation
    Inventor: Hisamo Sogawa
  • Patent number: 6492862
    Abstract: A charge pump type voltage conversion circuit comprises a voltage detector which detects whether a boosted output voltage is larger or smaller than a predetermined reference voltage. A clock generator generates a clock signal based on the result of detection by the voltage detector. A charge pump circuit produces the boosted output voltage in response to the clock signal. A transfer control circuit allows or inhibits transfer of the clock signal to the charge pump circuit depending on the result of detection by the voltage detector. When the condition of the transfer control circuit is changed from the inhibited condition to the allowed condition based on the clock signal outputted from the clock generator, an operation of the charge pump circuit always starts from a voltage boost sequence, thereby reducing a ripple components of the boosted output voltage.
    Type: Grant
    Filed: February 16, 2001
    Date of Patent: December 10, 2002
    Assignee: NEC Corporation
    Inventor: Akihiro Nakahara
  • Patent number: 6469765
    Abstract: A liquid crystal display and a method of operating such liquid crystal display in which display operation is performed by changing a director of said liquid crystal molecules mainly in a plane parallel to first and second substrate forming a liquid crystal display panel. Liquid crystal molecules in the liquid crystal display panel have a negative anisotropy of permittivity. The liquid crystal display comprises: a first common electrode disposed on the side of said first substrate; an insulating layer formed on the first common electrode; at least one pixel electrodes each of which is formed on the insulating layer and has a plurality of opening portions; a second common electrode disposed on the side of the second substrate.
    Type: Grant
    Filed: June 13, 2000
    Date of Patent: October 22, 2002
    Assignee: NEC Corporation
    Inventors: Hiroaki Matsuyama, Yoshihiko Hirai, Kazumi Kobayashi, Yuji Yamamoto, Mamoru Okamoto, Michiaki Sakamoto, Shinichi Nakata
  • Patent number: 6461173
    Abstract: In a hot-plug connector comprising a plurality of contacts used for a plurality of the uses, each of the contacts being provided with a peg portion for being mounted on a main surface of an electrical circuit board, a contact portion for removable connection to a mating contact of a mating connector, and a squeezed portion for being pushed into and hold by an insulator, the peg portions are equal in length to one another in a depth direction. The squeezed portions are equal in length to one another in the depth direction. The contact portions are different in length in the depth direction from one another so as to correspond to the uses. Therefore, the peg and the squeezed portions are located at the same location in the depth direction. The contact portions are protruded to the different location from each other in the depth direction.
    Type: Grant
    Filed: July 17, 2000
    Date of Patent: October 8, 2002
    Assignee: Japan Aviation Electronics Industry Limited
    Inventors: Tamotsu Mizuno, Keisuke Nakamura
  • Patent number: 6456109
    Abstract: A jitter detecting circuit firstly compares a target signal with a reference clock signal to see whether or not a phase difference takes place between the target signal and the reference clock signal, and, thereafter, the phase difference in each clock cycle is compared with the phase difference in the previous clock cycle for producing a detecting signal representative of cycle-to-cycle jitter when the phase difference is varied.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: September 24, 2002
    Assignee: NEC Corporation
    Inventor: Kenji Urushiyama
  • Patent number: 6454606
    Abstract: In a connector for use in connecting a cable (11) such as a coaxial cable, a contact element (12) is held by an insulator (13) and is connected to the cable. A conductive shell (14) covers the insulator. The conductive shell has a holding portion (17) for clamping and holding the cable in cooperation with the insulator. It is preferable that the shell has a first shell component (15) arranged at a position corresponding to a contacting portion of the contact element and fixedly held by the insulator and a second shell component (16) having the holding portion and removably held by the insulator.
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: September 24, 2002
    Assignee: Japan Aviation Electronics Industry, Ltd.
    Inventor: Isao Igarashi
  • Patent number: 6453053
    Abstract: The invention provides an identification data insertion and detection system for digital data which improves the detection ratio when an image is converted into frequency components and electronic watermark data are embedded in a portion of an image having a strong frequency component and besides allows a statistical similarly to be calculated with a higher degree of accuracy.
    Type: Grant
    Filed: December 19, 1997
    Date of Patent: September 17, 2002
    Assignee: NEC Corporation
    Inventor: Yutaka Wakasu
  • Patent number: 6448117
    Abstract: A simplified tri-layer process for forming a thin film transistor matrix for a liquid crystal display is disclosed. By forming a pixel electrode layer before a gate metal layer, a remaining portion of the gate metal layer surrounding the pixel electrode can function as a black matrix after properly patterning and etching the gate metal layer. The in-situ black matrix exempts from an additional step of providing a black matrix and solves the problem in alignment.
    Type: Grant
    Filed: September 6, 2000
    Date of Patent: September 10, 2002
    Assignee: Hannstar Display Corp.
    Inventors: Tean-Sen Jen, Jia-Shyong Cheng
  • Patent number: 6447314
    Abstract: In order to prevent damage to an electroconductive member during an assembly process or when using electronic equipment, a hinge connector is constituted primarily by a main unit connector assembly to be connected to a connector of a computer main unit, an LCD connector assembly to which an FPC from an LCD is connected, and an electroconductive member to be installed in these connector assemblies. The electroconductive member is comprised of connections provided at both ends and a flexible portion located between the connections. The flexible portion has a plurality of slits that extend in a direction for connecting the connections so that the flexible portion is contractible in the foregoing direction.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: September 10, 2002
    Assignee: Japan Aviation Electronics Industry, Limited
    Inventors: Nobukazu Kato, Kazukuni Hisatomi, Kazuhito Hisamatsu, Kazuhiro Fujino
  • Patent number: 6445018
    Abstract: A semiconductor device is disclosed, by which the parasitic capacitance of each signal line can be decreased, the time necessary for developing the device can be decreased, and which has a structure for simply and quickly performing the characteristic evaluation of the semiconductor device. The semiconductor device comprises a lower-layer signal line provided below one of a main power-supply line and a main ground line via an insulating layer; and an upper-layer signal line provided above said one of the main power-supply line and the main ground line via an insulating layer. A window is formed in said one of the main power-supply line and the main ground line; and the lower-layer signal line and the upper-layer signal line are electrically connected in a space inside the window, without contacting said one of the main power-supply line and the main ground line.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: September 3, 2002
    Assignee: NEC Corporation
    Inventor: Katsumi Okuaki
  • Patent number: 6437835
    Abstract: A system for transferring video data includes a difference detector for detecting the difference between a current field information and the preceding field information. The preceding information is obtained from an entered interlaced video signal. An interpolator generates current display frame information in response to an interpolation based upon the current filed information with regard to an area of the video signal in which there is a difference value between successive fields that exceeds a predetermined threshold value. The interframe difference between the current display frame information and preceding display frame information is detected by the difference detector. Only the interframe difference is transferred over a system bus to enable a frame display to be presented on non-interlacing display device.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: August 20, 2002
    Assignee: NEC Corporation
    Inventor: Susumu Sakamoto
  • Patent number: 6436740
    Abstract: A simplified tri-layer process for forming a thin film transistor matrix for a liquid crystal display is disclosed. By using a backside exposure technique, the masking step for patterning an etch stopper layer can be omitted. After forming an active region including a gate electrode and a scan line on the front side of a substrate, and sequentially applying an etch stopper layer and a photoresist layer over the resulting structure, the backside exposure is performed by exposing from the back side of the substrate. A portion of photoresist is shielded by the active region from exposure so that an etch stopper structure having a shape similar to the shape of the active region is formed without any photo-masking and lithographic procedure. Therefore, the above self-aligned effect allows one masking step to be reduced so as to simplify the process.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: August 20, 2002
    Assignee: Hannstar Display Corp.
    Inventors: Tean-Sen Jen, Jia-Shyong Cheng
  • Patent number: 6431897
    Abstract: In a connector having a rotary actuator (14) for bringing a sheet-like object (11) into press contact with a contact (13) held by a housing (12), the rotary actuator is engaged with the contact in a predetermined direction parallel to the sheet-like object and perpendicular to a center axis of a shaft portion (22) of the rotary actuator. The shaft portion is rotatably engaged with the housing. The contact has a contacting portion (15) to be faced to one surface of the sheet-like object and a supporting portion (16) to be faced to the other surface of the sheet-like object. The actuator has a cam portion (21) integrally connected to the shaft portion and located between the supporting portion and the sheet-like object. The supporting portion has a recess (17) which receives the cam portion to engage the cam portion with the supporting portion in the predetermined direction.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: August 13, 2002
    Assignee: Japan Aviation Electroncis Industry Limited
    Inventors: Osamu Hashiguchi, Kanji Inoue
  • Patent number: D462325
    Type: Grant
    Filed: May 23, 2001
    Date of Patent: September 3, 2002
    Assignee: Japan Aviation Electronics Industry, Limited
    Inventor: Yuko Nakatomi
  • Patent number: D463372
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: September 24, 2002
    Assignee: Japan Aviation Electronics Industry, Limited
    Inventors: Yukiko Sato, Yoshifumi Kubota, Osamu Takagi
  • Patent number: D463433
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: September 24, 2002
    Assignee: Hannstar Display Corp.
    Inventor: Chien Ju Hung
  • Patent number: D464320
    Type: Grant
    Filed: July 24, 2000
    Date of Patent: October 15, 2002
    Assignee: Japan Aviation Electronics Industry, Limited
    Inventors: Kazukuni Hisatomi, Masayuki Kikuchi
  • Patent number: D468351
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: January 7, 2003
    Assignee: World Wide Stationery Manufacturing Company Limited
    Inventor: Chun Yuen To