Patents Examined by Christopher Lo
  • Patent number: 8531126
    Abstract: A white light emitting apparatus includes a light source section in which a first white LED that emits white light whose chromaticity deviates to a blue side from a predetermined white region of a CIE chromaticity diagram and a second white LED that emits white light whose chromaticity deviates to a yellow side from the predetermined white region are adjacently disposed so as to emit light with optical axes in substantially the same direction, and a current regulator that independently drives the blue LED chip in the first and second white LEDs, respectively. A color mixture of lights emitted from the first and second white LEDs is adjusted to a chromaticity of the predetermined white region using the current regulator.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: September 10, 2013
    Assignee: Canon Components, Inc.
    Inventors: Takahiro Kaihotsu, Shozo Asai
  • Patent number: 8529116
    Abstract: A light guide plate includes a first surface, a second surface, at least a light incident surface, and a plurality of groove sets. The second surface is opposite to the first surface. The light incident surface connects the first surface and the second surface. The groove sets are separately disposed on the second surface. Each of the groove sets includes a plurality of curved grooves. Each of the curved grooves has a curved inclined reflective surface and a curved light-back-surface. The curved inclined reflective surface is inclined with respect to the first surface. The curved grooves of each of the groove sets curve towards a same curving direction. The curved inclined reflective surface of one of two curved grooves is connected to the curved light-back-surface of the other one of the two curved grooves. A backlight module is also provided.
    Type: Grant
    Filed: March 29, 2011
    Date of Patent: September 10, 2013
    Assignee: Coretronic Corporation
    Inventors: Han-Wen Tsai, Chih-Chieh Yu
  • Patent number: 8531205
    Abstract: One embodiment relates to a programmable output buffer which includes first and second programmable variable-impedance single-ended driver circuits and first and second termination circuits. The first termination circuit is coupled to a first output pin which is driven by the first programmable variable-impedance single-ended driver circuit, and the second termination circuit is coupled to a second output pin which is driven by the second programmable variable-impedance single-ended driver circuit. The first and second termination circuits are programmable to either provide parallel termination for a differential signal or drive single-ended signals with the parallel termination turned off. Other embodiments and features are also disclosed.
    Type: Grant
    Filed: January 31, 2012
    Date of Patent: September 10, 2013
    Assignee: Altera Corporation
    Inventors: Bonnie I. Wang, Chiakang Sung, Xiaobao Wang, Khai Nguyen, Joseph Huang
  • Patent number: 8502560
    Abstract: An output circuit which outputs an output signal based on an input signal from an output terminal and brings the output terminal into a high impedance state in response to an impedance control signal. The output circuit includes an output pMOS transistor connected at a source thereof to a first power supply. The output circuit includes an output nMOS transistor connected between a drain of the output pMOS transistor and ground. The output circuit includes an output terminal connected between the drain of the output pMOS transistor and a drain of the output nMOS transistor. The output circuit includes a first level shifter circuit which outputs a first gate control signal from a first gate control terminal to control on/off of the output pMOS transistor. The output circuit includes a second level shifter circuit which outputs a second gate control signal from a second gate control terminal to control on/off of the output nMOS transistor.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: August 6, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Takashi Taguchi, Hiroyuki Ideno
  • Patent number: 8502748
    Abstract: A three-dimensional dual-band antenna including a first radiation portion, a second radiation portion, a connection portion, an impedance matching portion and a feeding portion is provided. The second radiation portion is located under the radiation portion and parallel with the first radiation portion. The connection portion is connected to the first side of the first radiation portion and extended downward vertically, for connecting the first radiation portion and the second radiation portion. The impedance matching portion is connected to a second side of the first radiation portion and extended downward vertically. The first side and the second side are opposite. The feeding portion is connected to the second side and extended downward vertically. The feeding portion receives a feeding signal. The first and the second radiation portion are operated at the first and the second bandwidth respectively, wherein the second bandwidth is in higher frequency than the first bandwidth.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: August 6, 2013
    Assignee: Arcadyan Technology Corporation
    Inventors: Mao-Tse Liang, Shih-Chieh Cheng, Kuo-Chang Lo
  • Patent number: 8497638
    Abstract: A light source device which is used as the backlight device and does not generate sound is provided. One or more flat substrates each having a light emitting element on its surface side are supported by a chassis having a conductive flat plate surface so that back surfaces of the substrates are opposed to the flat plate surface. The substrate comprises first wiring conductive thin films on a surface side of an insulation substrate, and one or more second radiating or wiring conductive thin films on a back surface side of the insulation substrate. Two terminals of the light emitting element are connected to the two adjacent first conductive thin films. A potential of at least one of the second conductive thin films is fixed to have a constant potential difference or preferably fixed to the same potential with respect to that of the flat plate surface of the chassis.
    Type: Grant
    Filed: August 26, 2010
    Date of Patent: July 30, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Hiroshi Tanaka, Mitsuhisa Ohnishi, Akihisa Yamada, Takayoshi Tanaka, Manabu Onozaki
  • Patent number: 8487652
    Abstract: An integrated circuit includes a programmable logic device, a dedicated device, and an interface circuit between the two. The interface circuit can be easily modified to accommodate the different interface I/O demands of various dedicated devices that may be embedded into the integrated circuit. In one embodiment, the interface circuit may be implemented using a plurality of mask programmable uni-directional interface buffer circuits. The direction of any desired number of the interface buffer circuits can be reversed based on the needs of a desired dedicated device by re-routing the conductors in the interface buffer circuits in a single metal layer of the integrated circuit. In another embodiment, the interface circuit may be implemented using a hardware configurable bi-directional interface buffer circuit.
    Type: Grant
    Filed: August 18, 2011
    Date of Patent: July 16, 2013
    Assignee: QuickLogic Corporation
    Inventors: Ket-Chong Yap, Senani Gunaratna, Wilma Waiman Shiao
  • Patent number: 8466632
    Abstract: An LED device is provided. The LED device implements an efficient dimming operation. The LED device includes a triac dimmer for receiving an AC voltage and adjusting an angle of the AC voltage, a ballast for receiving the AC voltage from the triac dimmer and generating an AC voltage pulse, a bridge diode unit for generating a DC voltage pulse using the AC voltage pulse, an LED for receiving a DC current and emitting a light, an LED drive controller for receiving a dimming signal and controlling the DC current passing through the LED, and a dimming signal generator for receiving the AC voltage pulse from the ballast and generating a pulsating dimming signal for compensating an output of the triac dimmer and providing the dimming signal to the LED drive controller.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: June 18, 2013
    Assignee: LG Electronics Inc.
    Inventor: Sang Hyun Park
  • Patent number: 8461872
    Abstract: First and second devices may simultaneously communicate bidirectionally with each other using only a single pair of LVDS signal paths. Each device includes an input circuit and a differential output driver connected to the single pair of LVDS signal paths. An input to the input circuit is also connected to the input of the driver. The input circuit may also receive an offset voltage. In response to its inputs, the input circuit in each device can use comparators, gates and a multiplexer to determine the logic state being transmitted over the pair of LVDS signal paths from the other device. This advantageously reduces the number of required interconnects between the first and second devices by one half.
    Type: Grant
    Filed: August 2, 2011
    Date of Patent: June 11, 2013
    Assignee: Texas Instruments Incorporated
    Inventor: Lee D. Whetsel
  • Patent number: 8450936
    Abstract: The disclosed power supply is compatible with two voltage ranges, the midpoint or mean of the higher voltage range being approximately double the midpoint or mean of the lower voltage range. Two equivalent loads and two current sources are re-configured using a relay in response to a detected input voltage exceeding a pre-determined threshold voltage. The disclosed circuit re-configures the load being driven to match the input voltage, rather than re-configuring the voltage to match the load.
    Type: Grant
    Filed: May 13, 2010
    Date of Patent: May 28, 2013
    Assignee: Whelen Engineering Company, Inc.
    Inventor: James L. Stopa
  • Patent number: 8436782
    Abstract: A communication antenna device for use in radio communication between a moving body and an access point comprises an antenna main body for transmitting and receiving a signal, a base side member of the moving body for supporting the antenna main body, and a damping mechanism provided between the base side member and the antenna main body and suppressing high frequency vibration of the antenna main body that has an impact on the radio communication. The damping mechanism includes an elastic member for absorbing high frequency vibration that has an impact on the radio communication. The elastic member has such characteristics as absorbing high frequency vibration of the antenna main body that makes changes in amplitude or frequency of a transmission signal from the antenna main body to the extent of inducing a demodulation error when the transmission signal is received at an antenna of the other party.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: May 7, 2013
    Assignee: Toshiba Tec Kabushiki Kaisha
    Inventors: Tomonori Sugiyama, Naohiro Matsushita, Masakazu Kato, Sadatoshi Oishi, Jun Yaginuma, Sunao Tsuchida
  • Patent number: 8436548
    Abstract: A conduction angle detection circuit, and systems and methods incorporating the same, is disclosed. The circuit includes a comparator having a first input and a second input, and configured to provide a pulse-width modulated output in response to comparison of signals at the first input with signals at the second input. The output has a pulse width representative of a dimmer setting of a dimmer circuit. The circuit also includes a limiting circuit coupled to the comparator and configured to receive a rectified voltage and to provide a voltage-limited output in response to the rectified voltage to the first input of the comparator. The circuit also includes a threshold supply circuit configured to provide a threshold voltage to the second input of the comparator, and a filter coupled to the comparator. The filter is configured to convert the pulse-width modulated output of the comparator to the dimmer reference level signal.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: May 7, 2013
    Assignee: Osram Sylvania Inc.
    Inventor: Viatcheslav Anissimov
  • Patent number: 8436549
    Abstract: A drive circuit for a color temperature tunable LED light source. An apparatus includes a current driver configured to output a first drive current to drive a first group of LED chips of the light source to emit first color temperature light and to output a second drive current to drive a second group of LED chips of the light source to emit second color temperature light. The apparatus also includes a controller coupled to the current driver and configured to control the first and second drive currents so that the first color temperature light and the second color temperature light combine to produce a resulting light having a selected color temperature and a selected intensity value.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: May 7, 2013
    Assignee: Bridgelux, Inc.
    Inventor: Ghulam Hasnain
  • Patent number: 8432317
    Abstract: An antenna module for a portable device includes a first antenna section, a second antenna section, a third antenna section, a feed section, and a ground section. The first antenna section and the third antenna section form a first groove. The feed section and the ground section are parallel to each other. The first antenna section and the second antenna section jointly connect with the feed section.
    Type: Grant
    Filed: August 25, 2010
    Date of Patent: April 30, 2013
    Assignee: Chi Mei Communication Systems, Inc.
    Inventor: Hsi-Chieh Chen
  • Patent number: 8427200
    Abstract: A semiconductor device includes a first mono-crystallized semiconductor layer; and a second mono-crystallized semiconductor layer; wherein said first and second mono-crystallized semiconductor layers are overlaying one on top of the other, and wherein said first mono-crystallized semiconductor layer comprise repeating memory structure with sub structures defined by etching.
    Type: Grant
    Filed: November 7, 2010
    Date of Patent: April 23, 2013
    Assignee: Monolithic 3D Inc.
    Inventor: Zvi Or-Bach
  • Patent number: 8427203
    Abstract: An apparatus for reconfigurable computing logic implemented by an innovative memristor based computing architecture. The invention employs a decoder to select memristor devices whose ON/OFF impedance state will determine the reconfigurable logic output. Thus, the resulting circuit design can be electronically configured and re-configured to implement any multi-input/output Boolean logic computing functionality. Moreover, the invention retains its configured logic state without the application of a current or voltage source.
    Type: Grant
    Filed: January 30, 2012
    Date of Patent: April 23, 2013
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Robinson E. Pino, Youngok K. Pino
  • Patent number: 8421694
    Abstract: There is provided a composite antenna device for responding to waves in a plurality of radio frequency bands, including: a sheet of conductor plate; a first antenna provided on the sheet of conductor plate for responding to a linearly-polarized wave in at least one radio frequency band; and a second antenna provided on the sheet of conductor plate for responding to a circularly-polarized wave in a radio frequency band that is different from the at least one radio frequency band, wherein the first antenna has a ground portion, the second antenna is formed in an area in the ground portion, and each of the first antenna and the second antenna has a feeding point.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: April 16, 2013
    Assignee: Hitachi Cable, Ltd.
    Inventors: Naoki Iso, Haruyuki Watanabe, Morihiko Ikegaya, Tomoyuki Ogawa
  • Patent number: 8421364
    Abstract: A circuit for generating an output voltage to a top node of a plurality of LED strings. The circuit includes an inductor having a load current flowing therethrough and a switching transistor responsive to a switching control signal. An integrator generates a compensation voltage responsive to a voltage at a bottom node of the LED string and a reference voltage. Circuitry for combining an offset with the compensation voltage is responsive to the compensation voltage and the load current through the inductor. The offset is generated only during a step load change of the load current and substantially reduces voltage transients from the compensation voltage and the output voltage. A summation circuit sums the compensation voltage including the offset with at least the voltage at the bottom node of the LED string to generate a first control signal. A latch generates the switching control signal responsive to the first control signal and a leading edge blanking signal.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: April 16, 2013
    Assignee: Intersil Americas Inc.
    Inventors: Nicholas Ian Archibald, Allan Richard Warrington
  • Patent number: 8421379
    Abstract: An H-mode drift tube linac according to the present invention includes: an accelerator cavity which functions as a vacuum chamber and a resonator; drift tube electrodes for generating accelerating voltages in a charged particle transporting direction in the accelerator cavity; tuners for adjusting a distribution of electric fields generated at gaps between respective pairs of the drift tube electrodes; and antennas for measuring a variation of the distribution of the electric fields, the antennas being provided along the charged particle transporting direction in the accelerator cavity.
    Type: Grant
    Filed: May 28, 2010
    Date of Patent: April 16, 2013
    Assignee: Mitsubishi Electric Corporation
    Inventors: Kazuo Yamamoto, Hirofumi Tanaka, Yoichi Kuroda
  • Patent number: 8412179
    Abstract: A method of configuring power tool electronics in a hand-held power tool (10) having sensor means (20) for acquiring measurement data, a control unit (50) for processing measurement data and for controlling power tool functions, and a data transmission unit (30), includes transmitting data between the data transmission unit (30) and an evaluation location (62) by means of a mobile wireless network, with the power tool electronics being awakened from a quiescent mode (70) and activated at a time stored as a time parameter in a control program, retrieving a configuration file provided by the evaluation location (62) by the data transmission unit (30) via the mobile wireless network, and checking the response received from the mobile wireless network to determine whether or not it contains a new configuration file. If a configuration file was received, the parameters contained in the configuration file are implemented (77) in the control program for the power tool electronics.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: April 2, 2013
    Assignee: Hilti Aktiengesellschaft
    Inventors: Uwe Gerold, Joachim Keck, Norbert Welte