Patents Examined by Tung Le
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Patent number: 7176637Abstract: When a control unit is operated by a lighting control signal, when a reference voltage source unit outputs the reference voltage, voltage inputted into an error amplifier from a time constant circuit increases gradually with passage of time so as to reach the reference voltage. The error amplifier compares the voltage, which gradually increases with a power to be impressed to a lamp. An inverter circuit controls power to be supplied to the lamp according to the error signal. Thereby, the lamp power is controlled at time immediately after the lamp lighting signal is inputted. In addition, by providing a thermo-sensitive element for detecting circumference environmental temperature, it is possible to reduce influence to the light intensity due to the circumference environmental temperature. Further, the time constant circuit and the thermo-sensitive element may be provided in the detecting circuit.Type: GrantFiled: September 23, 2005Date of Patent: February 13, 2007Assignee: Ushio Denki Kabushiki KaishaInventors: Masaki Inoue, Hiroyuki Kushida, Takahiro Hiraoka
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Patent number: 7173384Abstract: A description is given of an illumination device which emits mixed-color light containing light of at least two different color channels (R, R1, G, G1, B, B1). The illumination device contains at least one primary light source (1) of a first color, the light of which forms a first color channel (R, R1, G, G1, B, B1), and at least one primary light source (1) of a second color, the light of which forms a second color channel (R, R1, G, G1, B, B1), at least one sensor device (3), which is positioned such that it can receive mixed-color light and is suitable for detecting brightness of light of a wavelength range comprising the color channels (R, R1, G, G1, B, B1) and which determines the brightnesses of the different color channels (R, R1, G, G1, B, B1) separately and repeatedly during operation.Type: GrantFiled: September 29, 2005Date of Patent: February 6, 2007Assignee: Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbHInventors: Ludwig Plötz, Alois Biebl, Andre Philipp
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Patent number: 7173564Abstract: An antenna for ultra-wide band communication is disclosed. The antenna includes a substrate, a patch formed on one side of the substrate so as to be smaller than the substrate, and being excited when an electric current is supplied through a feeder line, so as so radiate energy, and a ground area formed by removing a portion of another side of the substrate so as to obtain a wide band characteristic.Type: GrantFiled: July 20, 2004Date of Patent: February 6, 2007Assignee: LG Electronics Inc.Inventors: Jae Yeong Park, Seok Ho Choi, Jong Kweon Park, Sun Kyung Kim
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Patent number: 7166971Abstract: A circuit arrangement for operating a high pressure discharge lamp comprises a down converter equipped with an output capacitor and a commutator equipped with an ignition choke. The amplitude of the DC current generated by the down converter is controlled by means of a control circuit. To suppress resonance of the ignition choke with the output capacitor caused by commutation of the DC current, the current reference signal of the current control is adjusted in dependency of the power consumed by the lamp and in dependency of the lamp voltage immediately before and after each commutation.Type: GrantFiled: November 6, 2003Date of Patent: January 23, 2007Assignee: Koninklijke Philips Electronics N.V.Inventors: John Evarist Karel Georges De Clercq, Hans Antonie Feijen, Roy Hendrik Anna Maria Van Zundert
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Patent number: 7163316Abstract: A multi-functional ornamental lighting equipment is set forth. This equipment comprises an ornamental lighting load connected to form a plurality of branch circuits; a function controller formed of a variety of electric and electronic components operable for various prescribed functions, and having a power supply input terminal and an output terminal to the multi-branched circuit; a protective housing for enclosing the function controller; a connector unit connected with the protective housing and admitting to joint a plurality of conductors within it, one terminal of the conductors being connected to the output terminal of the function controller, while the other terminal thereof being connected to the ornamental lighting load; and a power supply connected to the input terminal of the function controller.Type: GrantFiled: August 18, 2004Date of Patent: January 16, 2007Inventor: Jeng-shyong Wu
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Patent number: 7156047Abstract: Provided is an apparatus for fabricating a semiconductor device using plasma, whereby a semiconductor device fabricating process using plasma provides significantly greater uniformity. The apparatus includes a process chamber, a first electrode through which a radio frequency (RF) power is supplied into the process chamber, a second electrode having a semiconductor substrate placed thereon, wherein the second electrode is disposed in the process chamber to face the first electrode and generates plasma used in fabricating a semiconductor device on the semiconductor substrate using the RF power, and a confinement ring assembly disposed between the first electrode and the second electrode, including a first confinement ring that moves in the vertical direction and a second confinement ring that surrounds the first confinement ring and moves in the vertical direction.Type: GrantFiled: April 22, 2005Date of Patent: January 2, 2007Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-Woo Kang, Jong-Sun Hyun
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Patent number: 7158393Abstract: In dynamic voltage sag correctors and other power conversion equipment having a DC bus that is subject to over-voltage conditions due to power being fed back by a regenerative load, a bus discharge switching device and a discharge resistor are connected in series across the DC bus lines. The discharge switching devices are switched on to discharge the energy storage device connected to the bus, or to separately discharge the two capacitors of a split capacitor DC bus, to eliminate the over-voltage conditions. The discharge switching devices may be switched on and off periodically with a selected duty cycle to discharge energy from the energy storage capacitor or other energy storage device through the discharge resistor at a rate which does not exceed the power rating of the discharge resistor. The discharge switching device may be switched with a fixed duty cycle or with a variable duty cycle that is based on the dynamic power dissipation characteristics of the discharge resistor.Type: GrantFiled: March 11, 2005Date of Patent: January 2, 2007Assignee: Soft Switching Technologies CorporationInventor: Robert S. Schneider
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Patent number: 7151345Abstract: The disclosed embodiments provide a method and apparatus for visual enhancement of liquid crystal displays. A microprocessor or embedded microcontroller associated with visual enhancement circuit modules allows a single inverter to control the intensity of illumination for an array of multiple CCFLs. The microcontroller continuously senses the operating currents of every lamp and adjusts for variations in illumination of individual lamps by parallel switching of capacitance that ensures an equal current is applied to each lamp. The microcontroller produces the appropriate control signals and executes a digital servo control algorithm to modify the currents for carrying out the luminance adjustments.Type: GrantFiled: November 8, 2004Date of Patent: December 19, 2006Assignee: Ceyx Technologies, Inc.Inventor: Jorge Sanchez
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Patent number: 7151346Abstract: The disclosed embodiments provide a method and apparatus for optimizing power efficiency in liquid crystal displays. A microprocessor or embedded microcontroller associated with circuit control modules eliminates redundancy by allowing a single inverter to equalize the intensity of illumination for an array of multiple CCFLs. The microcontroller optimizes power management by continuously sensing the operating currents of every lamp and automatically adjusts for variations in illumination of individual lamps by parallel switching of capacitance that ensures an equal current is applied to each lamp. The microcontroller produces the appropriate control signals and executes a digital servo control algorithm to modify the currents for carrying out the luminance adjustments.Type: GrantFiled: November 8, 2004Date of Patent: December 19, 2006Assignee: CEYX Technologies, Inc.Inventor: Jorge Sanchez
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Patent number: 7145509Abstract: A directivity controllable array antenna with a variable phase shifter is provided which is stable and has a small waveform and intermodulation distortion, excellent high power handling capability and low-loss. In an array antenna with a variable phase shifter, the variable phase shifter has a transmission line, and a variable capacitance capacitor is connected to a terminal of a ground side of the transmission line. In the variable capacitance capacitor, a plurality of variable capacitance elements each using a thin film dielectric layer whose dielectric constant changes in accordance with an applied voltage are connected between an input terminal and an output terminal, in parallel to each other with respect to direct current component and in series with each other with respect to high frequency component.Type: GrantFiled: February 16, 2005Date of Patent: December 5, 2006Assignee: Kyocera CorporationInventors: Takanori Ikuta, Akinori Sato
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Patent number: 7141942Abstract: Device for correcting the line and/or frame fields of a deflector for cathode ray tube comprising: a current sensor for evaluating the value of a line current Il a series of comparators intended to compare the value of the line current Il with reference values a current sensor for evaluating the value of the frame current It an analogue/digital converter for converting the analogue value of the frame current a programmed correction memory which is addressed by the output signals from the comparators and from the analogue/digital converter so as to deliver to at least one digital/analogue converter, data which are dependent on the addressing signals a low-pass filter for filtering the output of the digital/analogue converter at least one correction coil for correcting the deflection fields of the deflector, and generating a correction field as a function of the output value from the low-pass filter.Type: GrantFiled: June 12, 2003Date of Patent: November 28, 2006Assignee: Thomson LicensingInventors: Michel Petit, Jean-Luc Bellanger, Patrice Perdriset
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Patent number: 7141936Abstract: A driving circuit for a light emitting diode may include two transistors and an operational amplifier. The operational amplifier may act to cause the output voltages of the drain terminals of the transistors to be substantially equal, making the light emitting diode forward current substantially equal to the reference current. This current may provide a steady drive current, even when the supply voltage varies over a wide range.Type: GrantFiled: November 10, 2004Date of Patent: November 28, 2006Assignee: Xerox CorporationInventor: Harry J. McIntyre
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Patent number: 7141937Abstract: A full bridge circuit including four switching elements (Q1 to Q4) is alternated with a high switching frequency and a series-connected resonance circuit (5) including an inductor (L2) and a capacitor (C2) is made to resonate at a switching frequency of the full bridge circuit multiplied by an integer (for example, frequency multiplied by three), thereby generating a high voltage pulse for start up. After a high-pressure discharge lamp (DL) is started up, the full bridge circuit is alternated with a low switching frequency so as to operate as a step-down chopper for inverting the output polarity, thereby stably supplying rectangular wave voltage of low frequency to the high-pressure discharge lamp (DL) via a filter circuit including an inductor (L1) and a capacitor (C1).Type: GrantFiled: September 26, 2003Date of Patent: November 28, 2006Assignee: Matsushita Electric Works, Ltd.Inventors: Jun Kumagai, Akihiro Kishimoto, Hirofumi Konishi
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Patent number: 7135825Abstract: An LED power supply device has a loop circuit formed by a switching circuit, an LED and a comparison circuit, and a reference voltage generation circuit for providing reference voltage to the comparison circuit. The loop circuit oscillates so that substantially constant current is applied to the LED.Type: GrantFiled: August 26, 2004Date of Patent: November 14, 2006Assignee: Toyoda Gosei Co., Ltd.Inventor: Tetsuo Tanabe
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Patent number: 7129897Abstract: An array antenna apparatus includes a dielectric substrate, a feeder element, a parasitic element, and a directivity control unit. The feeder element and the parasitic element have an equal length. The feeder element and the parasitic element are arranged such that they intersect with each other at a substantially central portion of the parasitic element and a feeder unit of the feeder element and such that the parasitic elements are arranged symmetrically around the feeder element. An interval between the feeder element and the parasitic element is not larger than half wavelength of a radio wave. The parasitic element has a varactor diode serving as a variable capacitance element loaded. The directivity control unit supplies a control voltage to the varactor diode, and switches directivity of the array antenna apparatus.Type: GrantFiled: February 14, 2005Date of Patent: October 31, 2006Assignee: Advanced Telecommunications Research Institute InternationalInventors: Kyoichi Iigusa, Takuma Sawaya, Takashi Ohira, Hiroki Tanaka, Makoto Taromaru
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Patent number: 7122975Abstract: The invention relates to a light source unit control method and a light source control unit, and a light source unit comprising a filament lamp with a characteristic of having a light quantity changing almost in proportion to a control voltage, which comprise: a current detection sensor connected in series to the lamp; a multiplication circuit for generating a voltage Vw proportionate to the product of a terminal voltage V of the lamp and an output voltage V1 of said current detection sensor; a multiplication circuit for generating a voltage VWW proportionate to the square root of said voltage VW; an error amplifier circuit for controlling an error to the minimum by comparing the output voltage VWW of said multiplication circuit and the control voltage V1 and a constant voltage power source unit for supplying an electric power to the filament lamp, the unit being connected to an output terminal of the error amplifier circuit, wherein the light quantity of the lamp is controlled by controlling the control voltType: GrantFiled: July 20, 2005Date of Patent: October 17, 2006Assignee: Sumita Optical Glass, Inc.Inventor: Fumio Maruyama
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Patent number: 7122970Abstract: A method for testing an OLED substrate comprises: the first step of obtaining a first current value passing through a switching element group connected to a selection signal line; the second step of obtaining a second current value passing through a switching element group connected to a data signal line; and the third step of operating a current passing through each switching element including an OLED element from the current value for each pulse signal obtained by each of the steps 1 and 2.Type: GrantFiled: August 25, 2004Date of Patent: October 17, 2006Assignees: Chi Mei Optoelectronics Corp., Kyocera CorporationInventors: Shinya Ono, Yoshinao Kobayashi
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Patent number: 7122972Abstract: An AC to AC power conversion apparatus with constant power feeding characteristics to fluorescent lamp or FD lamp is described. The constant power characteristic is achieved by discontinuous mode operation of capacitor coupled in series with the load. Packets of energy are pumped out to the load in each switching cycle, regardless of the resonant characteristics. The dependence of the input power on the square of the supply voltage make the input resistive and produces good power factor automatically. The lamp load is dimmable by external phase control dimmer like resistive incandescent lamps. Multiple lamp loads with different power rating can be integrated by adding more sets of said capacitors and associated components.Type: GrantFiled: March 10, 2004Date of Patent: October 17, 2006Assignee: University of Hong KongInventors: Franki Ngai Kit Poon, Man Hay Pong, Joe Chiu Pong Liu
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Patent number: 7109664Abstract: This invention concerns a LED light which emits blaze-like radiance comprising a negative prop stand, with one end extending to a negative receiver which can connect to the negative power supply, a positive prop stand with one end extending to a positive receiver which can connect to the positive power supply, a first chip and a second chip established on the negative prop stand, and the first chip is linked to the positive prop stand by a first gold wire, a flicker IC chip established on the positive prop stand, and has the function of continuous linking and breaking of the circuit, the said flicker IC chip is linked to the negative prop stand and the second chip each by a second gold wire and a third gold wire, a plastic sealing cover which covers the interior of the negative prop stand, the positive prop stand, the first chip, the second chip, and the flicker IC chip.Type: GrantFiled: December 16, 2003Date of Patent: September 19, 2006Inventor: Tsu-Yeh Wu
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Patent number: 7106010Abstract: A backlight module for reducing interference includes: a plurality of radiating units, a plurality of transferring units, and a phase control unit. Each transferring unit is connected to a corresponding radiating unit and can provide a set of driving power sources to drive the radiating unit. The phase control unit couples to the plural transferring units and enables the plural driving power sources to differ from one another by an appropriate phase angle successively.Type: GrantFiled: August 2, 2004Date of Patent: September 12, 2006Assignee: Chunghwa Picture Tubes, Ltd.Inventors: Mu Shan Liao, Wen Tse Tseng