Patents by Inventor Yi-Chung Chou

Yi-Chung Chou has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20100019750
    Abstract: A current detection apparatus including a current detection circuit, a voltage regulation power supply circuit, and a package carrier is disclosed. The current detection circuit has a reference terminal and a detection terminal. The voltage regulation power supply circuit is used to generate an output voltage and includes a current transmission terminal for transmitting a current. The package carrier is used to carry the current detection circuit, the voltage regulation power supply circuit, a reference pad, and a current transmission pad. The package carrier includes at least one common voltage lead. The current transmission pad is coupled to the reference pad through at least one bonding wire such that an equivalent resistance is formed on the coupling path between the current transmission pad and the reference pad.
    Type: Application
    Filed: September 24, 2008
    Publication date: January 28, 2010
    Applicant: ITE TECH. INC.
    Inventors: Yi-Chung Chou, Chih-Yuan Kuo
  • Publication number: 20090315473
    Abstract: A light-emitting device driving circuit and a method thereof are provided. A terminal of a light-emitting device is coupled to a supply voltage and a cathode of a diode via an inductor, and the other terminal is coupled to an anode of the diode. The light-emitting device driving circuit includes a switch, a current-sensing circuit, and a switch control circuit. The current-sensing circuit is coupled to the anode of the diode via the switch to determine whether or not to generate a turning-off control signal according to a conducting-current value of the switch. The switch control circuit controls an on/off state of the switch, and turns off the switch according to the turning-off control signal. Besides, the switch control circuit compares the conducting-current value with a reference-current value to generate a comparing result to dynamically adjust a time length of turning off the switch accordingly.
    Type: Application
    Filed: September 26, 2008
    Publication date: December 24, 2009
    Applicant: ITE TECH. INC.
    Inventors: Ming-Heng Tsai, Yi-Chung Chou
  • Patent number: 7518525
    Abstract: An LED driver and a display device using the same are disclosed. The LED driver is adapted for driving a first set of LEDs and a second set of LEDs. The LED driver includes an inductor, a main switch, a first switch, a second switch, and a controller. The inductor has a first terminal receiving an input voltage. The main switch is coupled between a second terminal of the inductor and a common level for adjusting a current flowing therethrough. The first switch is coupled between the first set of LEDs and the second terminal of the inductor. The second switch is coupled between the second LEDs and the second terminal of the inductor. The controller is coupled to controlling terminals of the main switch, the first switch, and the second switch respectively for controlling conducting statuses of the main switch, the first switch, and the second switch respectively.
    Type: Grant
    Filed: January 15, 2007
    Date of Patent: April 14, 2009
    Assignee: ITE Tech. Inc.
    Inventor: Yi-Chung Chou
  • Patent number: 7486046
    Abstract: A boost/buck and DC/DC power converter with a charging function, a method thereof and a system incorporating the same are disclosed. The system uses an external power supply or a rechargeable battery as the power thereof. The power converter regulates the external power supply for producing the output voltage. An inductor-based booster/bucker further boosts or bucks the produced output voltage and the boosted or bucked output voltage charges the rechargeable battery.
    Type: Grant
    Filed: August 4, 2005
    Date of Patent: February 3, 2009
    Assignee: ITE Tech., Inc.
    Inventor: Yi-Chung Chou
  • Publication number: 20080290906
    Abstract: A constant-current driving circuit includes a first current source, a reference voltage generating circuit and an output signal generating circuit. A terminal of the first current source is coupled to a terminal of a first LED string, wherein the terminal of the first current source has a first voltage. The reference voltage generating circuit is used for generating a reference voltage and comparing the first voltage with a first predetermined voltage to generate a first comparing signal to thereby adjust the reference voltage. The output signal generating circuit is used for outputting an output signal to another terminal of the first LED string and receiving the input signal, wherein the output signal generating circuit decides whether or not to output the input signal serving as the output signal according to the comparison result of the reference voltage with the second voltage.
    Type: Application
    Filed: July 24, 2007
    Publication date: November 27, 2008
    Applicant: ITE TECH. INC.
    Inventors: Yi-Chung Chou, Hsu-Min Chen
  • Publication number: 20080164856
    Abstract: A current sensing circuit and power supply using the same are provided. The current sensing circuit includes a transistor, a control circuit and a sensing circuit, wherein the voltage endurance capability between a drain terminal of the transistor and a gate of the transistor is larger than the voltage endurance capability between a source terminal of the transistor and the gate of the transistor. The drain terminal is coupled to an under testing current source with an external high voltage. The control circuit is coupled to the gate of the transistor to control the conduction between the drain and the source terminals. The sensing circuit receives a sensing current signal from the source terminal of the transistor and transfers thereof to be a current sensing voltage.
    Type: Application
    Filed: March 7, 2007
    Publication date: July 10, 2008
    Applicant: ITE TECH. INC.
    Inventors: Hsu-Min Chen, Yi-Chung Chou
  • Publication number: 20080106505
    Abstract: An LED driver and a display device using the same are disclosed. The LED driver is adapted for driving a first set of LEDs and a second set of LEDs. The LED driver includes an inductor, a main switch, a first switch, a second switch, and a controller. The inductor has a first terminal receiving an input voltage. The main switch is coupled between a second terminal of the inductor and a common level for adjusting a current flowing therethrough. The first switch is coupled between the first set of LEDs and the second terminal of the inductor. The second switch is coupled between the second LEDs and the second terminal of the inductor. The controller is coupled to controlling terminals of the main switch, the first switch, and the second switch respectively for controlling conducting statuses of the main switch, the first switch, and the second switch respectively.
    Type: Application
    Filed: January 15, 2007
    Publication date: May 8, 2008
    Applicant: ITE TECH. INC.
    Inventor: Yi-Chung Chou
  • Patent number: 7365522
    Abstract: A multiple output stage converter (MOSC) and an operating method thereof are provided. The MOSC includes a first transistor, a second transistor, a third transistor, and a logic control module. A terminal of the first transistor, a terminal of the second transistor, and a terminal of the third transistor are coupled to a power source via an inductor. Another terminal of the first transistor is coupled to a first output terminal. Another terminal of the second transistor is coupled to a second output terminal. Another terminal of the third transistor is coupled to a ground voltage. The logic control module is used to control the on/off state of the second transistor. The well of the second transistor is floating when the first transistor or the third transistor is on. The well of the second transistor is floated or coupled to the second output terminal when the second transistor is on.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: April 29, 2008
    Assignee: ITE Tech. Inc.
    Inventors: Hsu-Min Chen, Yi-Chung Chou
  • Patent number: 7365589
    Abstract: A bandgap reference circuit, taking two or more power supplies as the input power supply for outputting a reference voltage, includes a first reference circuit, a second reference circuit, a power selection circuit and a switch circuit. The first and second reference circuits receive two respective power supplies for producing first and second voltages, respectively. As the power selection circuit takes the first power voltage level as the input voltage, the power selection circuit outputs a first control signal; while the power selection circuit takes the second power voltage level as the input voltage, the power selection circuit outputs a second control signal. The switch circuit is coupled to the power selection circuit, the first reference circuit and the second reference circuit. As the switch circuit receives the first control signal, it outputs the first voltage; while the switch circuit receives the second control signal, it outputs the second voltage.
    Type: Grant
    Filed: August 17, 2005
    Date of Patent: April 29, 2008
    Assignee: ITE Tech. Inc.
    Inventor: Yi-Chung Chou
  • Publication number: 20080036437
    Abstract: A multiple output stage converter (MOSC) and an operating method thereof are provided. The MOSC includes a first transistor, a second transistor, a third transistor, and a logic control module. A terminal of the first transistor, a terminal of the second transistor, and a terminal of the third transistor are coupled to a power source via an inductor. Another terminal of the first transistor is coupled to a first output terminal. Another terminal of the second transistor is coupled to a second output terminal. Another terminal of the third transistor is coupled to a ground voltage. The logic control module is used to control the on/off state of the second transistor. The well of the second transistor is floating when the first transistor or the third transistor is on. The well of the second transistor is floated or coupled to the second output terminal when the second transistor is on.
    Type: Application
    Filed: September 19, 2006
    Publication date: February 14, 2008
    Applicant: ITE TECH. INC.
    Inventors: Hsu-Min Chen, Yi-Chung Chou
  • Publication number: 20070024256
    Abstract: An integrated converter for converting a DC power source into multiple DC output voltages is provided. In the converter, a voltage regulator is selectively coupled to the power source. A control module outputs a timing signal based on a buck/boost signal. A voltage bucking/boosting module bucks or boosts the power source based on the timing signal. When the buck/boost signal indicates a buck operation, the voltage regulator is operably coupled to the power source to generate an output voltage, and the voltage bucking/boosting module bucks the generated output voltage to generate another output voltage.
    Type: Application
    Filed: July 27, 2005
    Publication date: February 1, 2007
    Inventor: Yi-Chung Chou
  • Publication number: 20070013436
    Abstract: The present invention provides a bandgap reference circuit, which includes a first current source, a second current source, a first reference circuit, a second reference circuit, and a selection circuit. The first reference circuit is coupled to the first current source and the second current source for outputting a first voltage signal. The second reference circuit is coupled to the first current source and the second current source for outputting a second voltage signal, wherein there is a phase difference between the first voltage signal and the second voltage signal. The selection circuit is coupled to the first reference circuit and the second reference circuit. One of the first voltage signal and the second voltage signal is alternatively selected by the selection circuit as an output reference voltage.
    Type: Application
    Filed: July 28, 2005
    Publication date: January 18, 2007
    Inventor: Yi-Chung Chou
  • Publication number: 20060284668
    Abstract: A bandgap reference circuit, taking two or more power supplies as the input power supply for outputting a reference voltage, includes a first reference circuit, a second reference circuit, a power selection circuit and a switch circuit. The first and second reference circuits receive two respective power supplies for producing first and second voltages, respectively. As the power selection circuit takes the first power voltage level as the input voltage, the power selection circuit outputs a first control signal; while the power selection circuit takes the second power voltage level as the input voltage, the power selection circuit outputs a second control signal. The switch circuit is coupled to the power selection circuit, the first reference circuit and the second reference circuit. As the switch circuit receives the first control signal, it outputs the first voltage; while the switch circuit receives the second control signal, it outputs the second voltage.
    Type: Application
    Filed: August 17, 2005
    Publication date: December 21, 2006
    Inventor: Yi-Chung Chou
  • Publication number: 20060262579
    Abstract: A boost/buck and DC/DC power converter with a charging function, a method thereof and a system incorporating the same are disclosed. The system uses an external power supply or a rechargeable battery as the power thereof. The power converter regulates the external power supply for producing the output voltage. An inductor-based booster/bucker further boosts or bucks the produced output voltage and the boosted or bucked output voltage charges the rechargeable battery.
    Type: Application
    Filed: August 4, 2005
    Publication date: November 23, 2006
    Inventor: Yi-Chung Chou