Patents Examined by Trinh Vo Dinh
  • Patent number: 8094084
    Abstract: A plate-shaped radiating element of a shape having at least three planes is formed by bending a metal plate having a substantially rectangular shape. A first slit is provided from a lower edge of the plate-shaped radiating element up to a portion in the vicinity of an upper edge of the plate-shaped radiating element while passing through a center point of the plate-shaped radiating element, and forms plate-shaped dipole elements on both sides thereof. A second slit is provided parallel to the upper edge of the plate-shaped radiating element and forms a folded element on an upper side thereof. Feeding points are provided on both sides of the first slit at the lower edge of the plate-shaped radiating element.
    Type: Grant
    Filed: March 15, 2006
    Date of Patent: January 10, 2012
    Assignee: Yagi Antenna Inc.
    Inventors: Atsushi Kaneko, Shuji Hagiwara
  • Patent number: 7830330
    Abstract: Regarding an antenna configuration (1) preferably provided for a telecommunication device and comprising a first resonator structure (6) and second resonator structure (RS) being capacitive coupled with the first resonator structure (6) it is suggested to provide the antenna configuration (1) with a control electrode (2) and a switching stage (3), said control electrode (2) by means of the switching stage (3) being switchably connected to ground (G) and said switching stage (3) enabling to change capacitive coupling of the two resonator structures (6, RS) and thus to change the resonance frequency of the antenna configuration (1) and making possible to switch between a first frequency range and a second frequency range for enhancing the bandwidth and achieving improved matching of the antenna configuration (1).
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: November 9, 2010
    Assignee: NXP B.V.
    Inventor: Heiko Pelzer
  • Patent number: 7466284
    Abstract: A chip seal ring that maintains the chip seal ring as a continuous barrier to contamination, while at the same time creating a desirable electrical feature in the seal ring that enables the use of an on-chip loop antenna. In one embodiment, at least a portion of the chip seal ring has a serpentine configuration, such as a square wave, triangle wave, or curved geometry, that increases the reactance and resistance of the seal ring so as to mitigate the adverse induced currents created by the magnetic coupling effects between the on-chip antenna and the seal rings, thereby improving the efficiency of an on-chip loop antenna in the presence of the seal ring.
    Type: Grant
    Filed: November 30, 2006
    Date of Patent: December 16, 2008
    Assignee: International Business Machines Corporation
    Inventor: Robert L. Barry
  • Patent number: 7463196
    Abstract: The invention relates to a dual-band antenna for preferable operation in the GSM and DCS frequency range. The dual-band antenna at the same time has the functionality of a diplexer. This makes it possible to produce wireless communication devices with one component less, which in turn reduces weight and production cost.
    Type: Grant
    Filed: February 15, 2005
    Date of Patent: December 9, 2008
    Assignee: NXP B.V.
    Inventor: Achim Hilgers
  • Patent number: 7453216
    Abstract: A high efficiency current resonance inverter circuit for a discharge lamp includes: a step-up transformer, a primary winding of the step-up transformer having a center tap being connected to a power source side, two other terminals of the primary winding being connected to collectors of two transistors, respectively, emitters of the two transistors being connected to respective terminals of a primary winding of a current transformer having a center tap, the center tap of the current transformer being connected to a ground side. A secondary winding of the current transformer is connected to bases of the two transistors to detect emitter currents of the two transistors in order to detect a resonance current, thereby performing oscillation. When the current resonance inverter circuit is used for a discharge lamp, the need for a conventional collector resonance inverter circuit is eliminated.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: November 18, 2008
    Inventor: Masakazu Ushijima
  • Patent number: 7453406
    Abstract: A wireless communications antenna system (100) includes a main circuit element (102) having a feed device (104) with an active port (108) and a grounding port (110), where the grounding port is coupled to a grounding device (106) of the main circuit element, a generally planar antenna element (112) having a feeding portion (114) coupled to the active port of the feed device, where the antenna element is electrically ungrounded, and a generally planar secondary circuit element (116) having a grounding portion (118) coupled to the grounding device. The secondary circuit element is positioned in proximity to the antenna element and the antenna element and the secondary circuit element are generally parallel and separated by a gap (X). Further, at least a portion of the secondary circuit element at least partially overlaps the antenna element.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: November 18, 2008
    Assignee: Motorola, Inc.
    Inventor: John P. Chenoweth
  • Patent number: 7449848
    Abstract: A cold-cathode tube driving circuit for driving a plurality of substantially-C-shaped cold-cathode tubes, includes: a first transformer 2 having primary windings which induce voltages, and secondary windings which apply voltages of opposite polarities (?V, +V) to respective ends of the respective substantially-C-shaped cold-cathode tubes; and a second transformer 3 having third and fourth primary windings which respectively induce voltages, and third and fourth secondary windings which apply voltages of opposite polarities (?V, +V) to respective ends of the respective substantially-C-shaped cold-cathode tubes. In the cold-cathode tube driving circuit, the first and second transformers 2, 3 apply an in-phase voltage to adjacent ends of the substantially-C-shaped cold-cathode tubes.
    Type: Grant
    Filed: November 4, 2005
    Date of Patent: November 11, 2008
    Assignee: Funai Electric Co., Ltd.
    Inventor: Kazuo Nishinosono
  • Patent number: 7439918
    Abstract: An adaptive antenna apparatus includes antenna elements. One of the antenna elements has an electrical length L1 larger than ?/2, and equal to or smaller than a predetermined upper-limit wavelength, where ? is a wavelength of a radio signal. Another antenna element has an electrical length L2 equal to or larger than a predetermined lower-limit wavelength and equal to or smaller than ?/2. A controller adaptive-controls the adaptive antenna apparatus to form a radiation pattern of the adaptive antenna apparatus including a plurality of nulls substantively in a direction of an interference wave by adjusting at least one of an amplitude and a phase of each radio signal received by the first and second antenna elements.
    Type: Grant
    Filed: December 6, 2005
    Date of Patent: October 21, 2008
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroshi Iwai, Atsushi Yamamoto, Koichi Ogawa, Yoshio Koyanagi
  • Patent number: 7425803
    Abstract: In a method for producing a control signal for regulating a drive current for driving an LED, a current through the LED is sensed, wherein the LED is driven by a power converter output, and wherein an output voltage of the power converter is proportionately controlled by a control signal. Next, a power supply voltage is sensed. The control signal is produced for the power converter, wherein the control signal is proportional to a difference between a reference voltage and the current through the LED. The control signal is then offset in response to the power supply voltage to reduce the current through the LED as the power supply voltage drops.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: September 16, 2008
    Assignee: STMicroelectronics, Inc.
    Inventors: Jianwen Shao, Clifford J. Ortmeyer, II
  • Patent number: 7417383
    Abstract: A method of driving a lamp of a liquid crystal display device includes generating a control signal; generating a first drive signal using the control signal; generating a second drive signal by shifting a voltage level of the first drive signal; selectively outputting one of a high potential supply voltage and a low potential supply voltage in response to the second drive signal; transforming the selectively outputted voltage; and supplying the transformed voltage to a lamp.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: August 26, 2008
    Assignee: LG Display Co., Ltd.
    Inventors: In Ho Ahn, Pu Jin Kim, Jae Hun Song, Chang Ho Lee
  • Patent number: 7414590
    Abstract: An antenna device has a sheet-shaped support which is folded along various fold-lines. The support includes a first support plane adjacent to one of the fold-lines and a second support place adjacent to the same fold-line. The first and second support places have first and second antenna structures, respectively, each arranged for receiving or emitting electro-magnetic radiation. The second support plane is positioned at an angle with respect to the first support plane. The second antenna structure is sensitive to electro-magnetic radiation which differs in, e.g., polarization from that of electro-magnetic radiation to which the first antenna structure is sensitive.
    Type: Grant
    Filed: July 6, 2004
    Date of Patent: August 19, 2008
    Assignee: Stichting Astron
    Inventors: Jan Geralt Bij De Vaate, Johannes Henricus Pragt, Huub Ehlhardt
  • Patent number: 7414369
    Abstract: A control system comprises a switch and a control module that communicates with the switch and that samples a filament resistance of a fluorescent light when the switch is off and that selectively increases current supplied to the fluorescent light above a nominal current value during turn on based on the filament resistance.
    Type: Grant
    Filed: July 26, 2005
    Date of Patent: August 19, 2008
    Assignee: Marvell World Trade Ltd.
    Inventor: Sehat Sutardja
  • Patent number: 7414583
    Abstract: Provided are a Planar Inverted-F Antenna (PIFA), a Radio Frequency Identification (RFID) tag using the PIFA. The present invention miniaturizes the antenna by using a meander line extended from a radiating edge of a radiation antenna and adjusting a resonant frequency of the antenna, and it performs impedance matching by adjusting capacitive reactance of the antenna. Also, it can perform impedance matching by using a stub having a slot formed therein and adjusting inductive reactance and capacitive reactance of the antenna. The present invention miniaturizes the antenna by using a plurality of shorting plates for shorting the radiation patch from a grounding surface and adjusting the resonant frequency of the antenna. The present invention also provides an inexpensive PIFA antenna with an excellent radiation efficiency by forming the radiation patch in the form of metal sheet in the antenna and floating the radiation patch in the air.
    Type: Grant
    Filed: December 7, 2005
    Date of Patent: August 19, 2008
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Won-Kyu Choi, Nak-Seon Seong, Cheol-Sig Pyo, Jong-Suk Chae
  • Patent number: 7411553
    Abstract: The present invention provides inexpensively a planar antenna module that is able to realize a loss reduction, a reduction in characteristic variation caused by an assembling error, and an improved stability in frequency characteristics. A planar antenna module according to one preferred embodiment of the present invention comprises an antenna portion (101), a feeder portion (102), and a connection plate (18). The antenna portion (101) includes a first ground plate (11) having a first slot (21), a second ground plate (12) having dielectrics, an antenna substrate having a radiation element (41), a third ground plate (13) having dielectrics, a fourth ground plate (14). The feeder portion (102) includes the fourth ground plate (14), a fifth ground plate (15), a feed substrate (50), a sixth ground plate (16), a seventh ground plate (17). The connection plate (18) has a second waveguide opening portion (64).
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: August 12, 2008
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Masahiko Oota, Hisayoshi Mizugaki, Keisuke Iijima, Takashi Saitou, Masaya Kirihara
  • Patent number: 7411571
    Abstract: An organic light emitting display that is capable of preventing degradation of picture quality, and a method of manufacturing the organic light emitting display are provided. A unit pixel for the organic light emitting display, includes a first transistor coupled to a data line and having a first voltage threshold, a second transistor coupled to the first and third transistors and controlled by a second select signal, a third transistor coupled to the first transistor and controlled by a first select signal, and a fourth transistor coupled to the third transistor and having a fourth voltage threshold such that a drive current of the fourth transistor is controlled independent of the fourth voltage threshold.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: August 12, 2008
    Assignee: LG Display Co., Ltd.
    Inventor: Jin Huh
  • Patent number: 7408517
    Abstract: A frequency-tunable capacitively-loaded magnetic dipole antenna includes a transformer loop having a balanced feed interface, and a capacitively-loaded magnetic dipole radiator with a tunable effective electrical length. In one embodiment, the capacitively-loaded magnetic dipole radiator includes a tunable electric field bridge. For example, the capacitively-loaded magnetic dipole radiator may comprise a quasi loop with a tunable electric field bridge interposed between the quasi loop first and second ends. The electric field bridge may be an element such as a ferroelectric (FE) tunable capacitor or a microelectromechanical system (MEMS) capacitor, to name a couple of examples. In certain embodiments, the capacitively-loaded magnetic dipole radiator includes a quasi loop with a loop perimeter. The effective electrical length of the radiator is changed by adjusting the perimeter using an element such as a MEMS switch, or a semiconductor switch.
    Type: Grant
    Filed: January 25, 2006
    Date of Patent: August 5, 2008
    Assignee: Kyocera Wireless Corp.
    Inventors: Gregory Poilasne, Vaneet Pathak, Jordi Fabrega, Huan-Sheng Hwang
  • Patent number: 7403159
    Abstract: An electrically conductive hexagonal patch element for a patch antenna. The hexagonal patch element comprising a hexagonal shape with a first angle and a second angle opposite the first angle, a third angle and a fourth angle opposite the third angle, a fifth angle and a sixth angle opposite the fifth angle, the first, third, and fifth angles each measuring approximately 150 degrees and the second, forth, and sixth angles each measuring approximately 90 degrees, wherein the first angle is positioned in between the fourth angle and the sixth angle.
    Type: Grant
    Filed: May 8, 2006
    Date of Patent: July 22, 2008
    Inventor: Dmitry Gooshchin
  • Patent number: 7400093
    Abstract: A method for generating an electron beam includes prescribing a location, and generating an envelope of electrons, the envelope having a waist, wherein the generating is performed such that the waist of the envelope is at or adjacent to the prescribed location. A device for generating an electron beam includes a gun source for generating electrons, and a plurality of electromagnetic cavities coupled in series to form a body, the electromagnetic cavities configured to accelerate at least some of the electrons to create a beam of electrons at an energy level having a value between 5 MeV and 20 MeV, the beam of electrons having a cross sectional dimension that is 0.02 ? (or 2 mm) or less.
    Type: Grant
    Filed: October 1, 2004
    Date of Patent: July 15, 2008
    Assignee: Varian Medical Systems Technologies, Inc.
    Inventors: Arthur Salop, David H. Whittum, Michael A. Kauffman, Mark E. Trail, Gard E. Meddaugh
  • Patent number: 7397195
    Abstract: A control circuit for LEDs is adapted for controlling brightness of a plurality of LEDs as light source in an LCD. The control circuit comprises a control pulse generator and a plurality of LED direct current supplies. The control pulse generator is used for receiving a brightness adjusting signal and generating a plurality of brightness control pulse signals having the same frequency but different phases according to the brightness control signals. The work cycle of the brightness control pulse signal varies in a predetermined range according to the brightness control signal. The LED direct current provider is coupled to the control pulse generator to drive the corresponding LED according to the brightness pulse signal.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: July 8, 2008
    Assignee: Beyond Innovation Technology Co., Ltd.
    Inventors: Chung-Che Yu, Li-Min Lee
  • Patent number: 7382320
    Abstract: The present invention relates to a circularly polarized antenna and, more particularly, to a compact circularly polarized antenna for transmitting and receiving a circularly polarized signal. The circularly polarized antenna comprises a substrate having an upper surface and a lower surface; a signal distributor; an antenna for transmitting and receiving the circularly polarized signal; and a plurality of support units. The upper surface of the substrate comprises a plurality of slots. One end of each slot overlaps with the respective ends of the other slots at a central region. The lower surface of the substrate comprises a coupling unit being electrically connected with the signal distributor, and the center of the coupling unit corresponds to the central region.
    Type: Grant
    Filed: July 24, 2006
    Date of Patent: June 3, 2008
    Assignee: Tatung Company and Tatung University
    Inventors: The-Nan Chang, Chun-Ming Lin