Patents Examined by Chuc D Tran
  • Patent number: 6680586
    Abstract: A professional lighting control system includes a plurality of light modules. Each light module contains a light set with at least one light source and at least one switch for switching the light source on and off. The light module also contains a driving circuit electrically connected to the light set, the driving circuit having at least one switch driver for driving the switch of the light set, and a first transceiver for wirelessly receiving control signals for the light set. The control system also includes a main console, which has a signal generator for generating the control signals that control the light set, and a controller electrically connected to the signal generator for receiving the control signals. The controller has a second transceiver for wirelessly sending control signals received from the signal generator to the first transceiver of the driving circuit so as to control the light set.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: January 20, 2004
    Assignee: Transpace Tech Co., LTD
    Inventor: Heng-Chien Chen
  • Patent number: 6642660
    Abstract: A shunt member includes an insulation sheath, a first lead wire having a shunt wire engaging section located in the insulation sheath, a second lead wire having a shunt wire engaging section located in the insulation sheath and adjacent to the shunt wire engaging section of the first lead wire. A shunt wire is connected between the shunt wire engaging sections of the first lead wire and the second lead wire for forming a shunt circuit of the bulb. When the shunt member is received in the lamp holder, the shunt member and the filament of the lamp are connected in parallel. An insulation bead member is further fixedly mounted between the shunt wire engaging sections of the first lead wire and the second lead wire for keeping a fixed distance therebetween.
    Type: Grant
    Filed: July 12, 2002
    Date of Patent: November 4, 2003
    Inventor: Whiter Shieh
  • Patent number: 6621231
    Abstract: A structure of barrier ribs in the plasma display panel is provided. The structure of barrier ribs in a plasma display panel is characterized by comprising at least one barrier rib of a half-matrix shape 35 to 37 and 45 to 48 in which protrusions 38, 39 and 49 are formed between the barrier ribs, thereby being capable of complementing the different emission characteristics among the three kinds (R, G, and B) of phosphors to be used in the plasma display panel with improving the whole luminescence and a white balance, simplifying processes of manufacturing it, and enhancing working steadiness and the reliability of the post process.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: September 16, 2003
    Assignee: Orion Electric Co., Ltd.
    Inventor: Hyuk Chae Kwon
  • Patent number: 6605906
    Abstract: A light source device in which a discharge lamp, which contains greater than or equal to 0.15 mg mercury per cubic millimeter of the volume of the discharge space, and in which there is a pair of electrodes disposed opposite one another, is connected to a feed device (Ex). The feed device is used to start the discharge lamp and to supply the discharge current to the electrodes. The feed device (Ex) serves an identification function identifying a discharge state of the discharge lamp as a glow discharge state. Further, during the identification of the glow discharge state, the electric power supplied to the discharge lamp is set at less than or equal to twice as high as the nominal electric power of the above described discharge lamp to eliminate the formation of blackening on the inside of the bulb glass during glow discharge.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: August 12, 2003
    Assignee: Ushiodenki Kabushiki Kaisha
    Inventors: Masashi Okamoto, Takashi Yamashita
  • Patent number: 6603274
    Abstract: A fluorescent lamp ballast circuit including a phase cut dimmer connectable to a source of AC power, the selectable phase cut dimmer and an electronic switch having a trigger voltage and a conduction period, when the electronic switch triggers to the end of the half cycle, a rectifying and charging circuit coupled to the output of the phase cut dimmer for providing a DC voltage across a DC bus, a filter circuit receiving the output of said phase cut dimmer and converting the output to a control signal related to the firing angle of the electronic switch; an output stage coupled to the lamp, the output stage having at least one electronic switching device; the ballast control circuit including a control input for changing a frequency of said pulsed power signal, the control input being coupled to said control signal, the control signal varying in accordance with the firing angle of he electronic switch, thereby varying the brightness level of said fluorescent lamp.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: August 5, 2003
    Assignee: International Rectifier Corporation
    Inventors: Thomas J. Ribarich, Peter Green
  • Patent number: 6600452
    Abstract: An antenna circuit and matching technique that cancels the inductive reactance of an antenna and thereby reduces the reactive voltage of the antenna are provided. Serial tuning capacitors are inserted along the conductor of the loop antenna as often as necessary to achieve a negligible instantaneous level of reactance on the antenna. The loop antenna is broken up into loop segments, where each segment may or may not have a serial capacitor depending on the desired performance criteria. Each capacitor is selected so as to have a reactance that effectively cancels the inductive reactance of a portion of the loop segment preceding the corresponding serial capacitor. The advantage is that the instantaneous level of reactance on antenna stays nulled, and thus any reactive voltage difference between loop segments remains negligible, even with high current flowing inside the antenna. Parasitics such as ohmic losses, internal capacitive loss and capacitive loss to the external world are all reduced.
    Type: Grant
    Filed: November 29, 2001
    Date of Patent: July 29, 2003
    Assignee: Logitech Europe S.A.
    Inventor: Philippe Junod
  • Patent number: 6597125
    Abstract: A string set of series-connected incandescent flasher type lamps in which substantially all of the lamp filaments in the set are individually provided with a voltage regulated shunt circuit, which includes a voltage responsive silicon semiconductor device, which operates in one of two conducting states, neither of which is greater than about 200 ohms. When the flasher lamp is in the “on” or illuminated state, the silicon semiconductor voltage regulating shunt device is in a low impedance state. When the flasher is in the “off” state, the impedance of the silicon semiconductor device is in a lower impedance state equal to or slightly greater than the parallel equivalent impedance of silicon semiconductor device in parallel with the normal operating impedance of the flasher lamp.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: July 22, 2003
    Assignee: JLJ, Inc.
    Inventor: John Louis Janning
  • Patent number: 6590541
    Abstract: The present invention relates to a half-loop antenna having an antenna half-loop positioned on top of a ground plane, the antenna half-loop forming an area whose outer edge forms a convex closed curve, that is, it is curved toward the outside. Preferably, the developed view of the conductor half-loop has the form of an ellipse tapering to a point at its ends, and at the feed-in point of the conductor half-loop an inductance can be inserted, formed as a spring.
    Type: Grant
    Filed: September 18, 2001
    Date of Patent: July 8, 2003
    Assignee: Robert Bosch GmbH
    Inventor: Ralf Schultze
  • Patent number: 6590353
    Abstract: Disclosed is a device to control a circuit for the vertical deflection of a spot scanning a screen, and more particularly a control device whose output amplifier stage works in class D mode at the rate of a switching signal called a first switching signal. The control device has an internal auxiliary supply to generate the overvoltage needed for the fast flyback of the spot. This auxiliary power supply is a switching voltage generation circuit whose switching signal, called a second switching signal, is synchronous with the first switching signal. The present invention has been shown to used advantageously in television screens and/or computer screens.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: July 8, 2003
    Assignee: STMicroelectronics S.A.
    Inventors: Philippe Maige, Yannick Guedon
  • Patent number: 6577071
    Abstract: In a data driver circuit for a plasma display device having a first data electrode and a second electrode that are disposed adjacently each other, the data driver circuit having: a first circuit means for outputting first display data to the first data electrode; a second circuit means for outputting second display data to the second data electrode; and an output timing control means for controlling a timing of outputting the first display data from the first circuit means to the first data electrode or a timing of outputting the second display data from the second circuit means to the second data electrode.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: June 10, 2003
    Assignee: NEC Corporation
    Inventor: Kazuhisa Matsumoto
  • Patent number: 6573668
    Abstract: A color cathode ray tube using a self-convergence method is provided with magnets for correcting top/bottom pincushion distortion, and includes a vertical deflection coil and a four-pole coil. The vertical deflection coil generates a first correction field distorted in a barrel shape. The four-pole coil is arranged on the side of a deflection yoke nearer to an electron gun, and corrects YH barrel pattern misconvergence by generating a second correction field. The strength of the second correction field varies according to the amount of vertical deflection applied to electron beams emitted by the electron gun.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: June 3, 2003
    Assignee: Matsushita Electric Ind., Co., Ltd.
    Inventor: Etsuji Tagami
  • Patent number: 6565230
    Abstract: A method for converting a higher voltage recessed light fixture such as a fixture having an Edison base to a second lower voltage halogen fixture, and a retrofitted recessed light fixture for providing a halogen bulb light source. The light fixture includes an open-end housing, a higher voltage connection base disposed within the housing, and a transformer with a base connector element complimentary to the connection base and connected into the base. The transformer provides halogen bulb voltage and accepts a halogen bulb. An end enclosure covers the open end of the housing except for an opening there through which exposes the illumination face of the halogen bulb. Connecting the halogen bulb to the transformer and applying electric power through the base results in illumination delivery from the halogen bulb in a modernistically appearing light fixture.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: May 20, 2003
    Inventor: Josh Ashley
  • Patent number: 6563259
    Abstract: A deflection yoke of Braun tube having a horizontal deflection coil for horizontally deflecting electron beams radiated from an electron gun, a vertical deflection coil for vertically deflecting the electron beams, and a holder inserted between the horizontal and the vertical deflection coils for mechanically fixing them and electrically insulating them, including: an auxiliary coil having a first deflection portion coil extendedly formed from a ‘3-o'clock’ position of a neck side to a ‘3-o'clock’ direction of a screen side on the basis of the lengthy direction of the deflection coil; a first flange coil extendedly formed for a predetermined length from a ‘3-o'clock’ position of the screen side to a ‘12-o'clock’ direction of the screen side; a second deflection portion coil extendedly formed for a predetermined length from a ‘12-o'clock’ position of the screen side to a ‘12-o'clock’ direction of the neck side
    Type: Grant
    Filed: December 28, 2000
    Date of Patent: May 13, 2003
    Assignee: LG Electronics Inc.
    Inventor: Jong Ho Lim
  • Patent number: 6563274
    Abstract: A light-emitting element drive circuit is provided whereby level variation of the drive current can be suppressed. This circuit is provided with a detection circuit 4 that detects the DC current component I6′ of high-frequency current I4 (I5) flowing through a second current mirror circuit 2, and an adjustment circuit 5 that subtracts the DC current component I6′ detected by the detection circuit 4 from the DC current I1 (I7) flowing through line 1B of first current mirror circuit 1. Thus, level variation of the drive current IL′ which represents the superposition of the DC and high-frequency can be suppressed.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: May 13, 2003
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Takashi Suzuki, Seiichiro Mizuno
  • Patent number: 6552497
    Abstract: A light bulb type fluorescent lamp lighting apparatus includes a fluorescent light emitting tube; and an electronic lighting circuit for applying an electric current to the fluorescent light emitting tube. The electronic lighting circuit includes a pair of electrode filaments provided in the fluorescent light emitting tube, a capacitor connected parallel to the fluorescent light emitting tube, an inductor connected in series to one of the pair of electrode filaments, and at least one temperature negative characteristic resistance element connected parallel to at least one of the pair of electrode filaments. The at least one temperature negative characteristic resistance element has a resistance impedance, and the fluorescent light emitting tube is started based on a change in the resistance impedance of the at least one temperature negative characteristic resistance element.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: April 22, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroki Nakagawa, Tetsuya Tahara
  • Patent number: 6552500
    Abstract: An electronic control (1) for a discharge lamp (D), which is arranged to be connected to a source of alternating current (L,N), having a source frequency, the control having a first and second terminal (J,K) for supplying an electrical power output to operate the lamp; a capacitor (T) is in series with the first terminal, having a capacitance sufficiently small to limit a current flow from the first terminal at the source frequency of less than 30 mA.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: April 22, 2003
    Assignee: Microlights Limited
    Inventor: Lawrence Samuel Tyson
  • Patent number: 6531831
    Abstract: An electronic ballast for lamps or tubes is provided. In one embodiment the present invention includes a ballast controller that includes filament heating circuitry and dimming circuitry. The filament heating circuitry may include preheat dimming circuits which preheat the filaments for a predetermined time period prior to striking the lamp, and steady-state heating circuitry that continually heats the filaments during steady state operation of the lamp. The steady state heating circuitry may be adapted to heat the filaments inversely proportional to the dim desired value of the lamp. The dimming circuitry may include conventional analog dimming and/or burst mode dimming to define a wide range of dimming characteristics for the lamp.
    Type: Grant
    Filed: April 3, 2001
    Date of Patent: March 11, 2003
    Assignee: O2Micro International Limited
    Inventors: John Chou, Yung-Lin Lin
  • Patent number: 6504318
    Abstract: The invention relates to a supply coupling of a fluorescent lamp used for supervising the operation and condition of a lamp circuit, particularly a supply coupling in connection with an electronic coupling device wherein the power required by the lamp circuit is supplied to the coupling by a transformer. The supply coupling comprises a supply transformer (T1), a resonance circuit comprising the secondary coil (N2) of the transformer (T1) and a capacitor (C1) connected in parallel with the secondary coil, and a fluorescent tube (Lamp 1) connected in parallel with the resonance circuit and comprising fluorescent cathodes (F1, F2).
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: January 7, 2003
    Assignee: Innoware Oy
    Inventor: Heikki Pienisaari
  • Patent number: 6452337
    Abstract: There is provided a lamp circuit for automobiles which complies with DRL illumination and reduces the number of electrically functional components and circuits. The lamp circuit for automobiles includes a DRL controller complying with DRL illumination, a lamp switch box, and a DRL relay which is also used for the head lamps. The DRL relay has two contact points, a common contact point, and two coils. This allows only one relay to be provided within the area in which two relays have conventionally been applied, thereby reducing the number of relays and necessary circuits.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: September 17, 2002
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventor: Takashi Murata
  • Patent number: 6392367
    Abstract: A DC power source is connected to a base of a transistor of each of inverter circuit through a resistance in series. A primary winding having an intermediate tap of an inverter transformer, a resonance capacitor and a primary winding of a synchronization transformer are connected together in parallel between collectors of a pair of transistors having grounded emitters.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: May 21, 2002
    Assignee: Harison Toshiba Lighting Co., Ltd.
    Inventors: Atsushi Heike, Tomohiro Mizoguchi