Patents by Inventor Tsung-Wei Huang

Tsung-Wei Huang 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).

  • Charge pump regulator and method of producing a regulated voltage
    Patent number: 8362823
    Abstract: A charge pump regulator has a charge pump to establish a charge path and a discharge path alternately, so as to produce a regulated voltage on an output terminal. The charge pump has at least a current control element on the charge path or the discharge path to control the current flowing therethrough according to an output-dependent feedback signal.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: January 29, 2013
    Assignee: Richtek Technology Corp.
    Inventors: Shui-Mu Lin, Tsung-Wei Huang, Jien-Sheng Chen
  • Charge pump regulator and method of producing a regulated voltage
    Patent number: 8358168
    Abstract: A charge pump regulator has a charge pump to establish a charge path and a discharge path alternately, so as to produce a regulated voltage on an output terminal. The charge pump has at least a current control element on the charge path or the discharge path to control the current flowing therethrough according to an output-dependent feedback signal.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: January 22, 2013
    Assignee: Richtek Technology Corp.
    Inventors: Shui-Mu Lin, Tsung-Wei Huang, Jien-Sheng Chen
  • Charge pump regulator and method of producing a regulated voltage
    Patent number: 8310299
    Abstract: A charge pump regulator has a charge pump to establish a charge path and a discharge path alternately, so as to produce a regulated voltage on an output terminal. The charge pump has at least a current control element on the charge path or the discharge path to control the current flowing therethrough according to an output-dependent feedback signal.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: November 13, 2012
    Assignee: Richtek Technology Corp.
    Inventors: Shui-Mu Lin, Tsung-Wei Huang, Jien-Sheng Chen
  • Charge pump regulator and method of producing a regulated voltage
    Patent number: 8242833
    Abstract: A charge pump regulator has a charge pump to establish a charge path and a discharge path alternately, so as to produce a regulated voltage on an output terminal. The charge pump has at least a current control element on the charge path or the discharge path to control the current flowing therethrough according to an output-dependent feedback signal.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: August 14, 2012
    Assignee: Richtek Technology Corp.
    Inventors: Shui-Mu Lin, Tsung-Wei Huang, Jien-Sheng Chen
  • Perceptually linear LED brightness control
    Patent number: 8198830
    Abstract: A current regulator includes a first current source to provide a reference current varying with a dimming step, and a second current source to generate a drive current for a white LED according to the reference current. The reference current and the dimming step have a relationship identical to or approximating a relationship between luminance and lightness perceived by human eyes. Thus, the white LED is controlled to have a linear variation of the luminance perceived by human eyes when the dimming step is changed.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: June 12, 2012
    Assignee: Richtek Technology Corp.
    Inventors: Shui-Mu Lin, Tsung-Wei Huang, Jien-Sheng Chen, Kwan-Jen Chu
  • Anti-ring asynchronous boost converter and anti-ring method for an asynchronous boost converter
    Patent number: 8169198
    Abstract: The phase node voltage or the PWM signal in an asynchronous boost converter is monitored to detect a phase node voltage ringing. When a phase node voltage ringing is detected, a detection signal is asserted to establish a bypass path to bypass the inductor of the converter. A charge bypass circuit is shunt to the inductor, and controlled by the detection signal to establish the bypass path. Due to the bypass path, the phase node voltage is maintained at a constant, and the phase node voltage radiation and input/output noise are eliminated.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: May 1, 2012
    Assignee: Richtek Technology Corp.
    Inventors: Shui-Mu Lin, Jien-Sheng Chen, Kwan-Jen Chu, Tsung-Wei Huang, Chao-Hsuan Chuang
  • Current regulator and method for efficiency improvement of a LED display system
    Patent number: 8138686
    Abstract: For efficiency improvement of a LED display system including a charge pump and a LED connected to either the voltage input terminal or the voltage output terminal of the charge pump, either one or both of two current regulators are enabled according to a voltage detected from the LED, for establishing a driving current for the LED. When the detected voltage is higher than a threshold, the first one of the current sources is enabled sole. When the detected voltage is lower than the threshold, the second one of the current sources is enabled sole, or both the current sources are enabled, or the current sources are alternatively enabled.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: March 20, 2012
    Assignee: Richtek Technology Corp.
    Inventors: Shui-Mu Lin, Tsung-Wei Huang, Jien-Sheng Chen
  • ADAPTIVE TWO-STAGE VOLTAGE REGULATOR AND METHOD FOR TWO-STAGE VOLTAGE REGULATION
    Publication number: 20110285366
    Abstract: The present invention discloses an adaptive two-stage voltage regulator and a method for controlling the same. The adaptive two-stage voltage regulator includes: a voltage regulator for converting an input voltage (Vin) to a middle voltage (Vm), wherein Vin?Vin_max; a linear regulator for converting the middle voltage to an output voltage (Vout); and a middle voltage controller for adjusting the middle voltage according to (1) an input voltage indicator and one of (2a) an output voltage indicator and (2b) a predetermined reference signal, such that when Vin?Vout, Vm=Vout+?V and (Vout+?V)<Vin_max.
    Type: Application
    Filed: May 18, 2010
    Publication date: November 24, 2011
    Inventors: Tsung-Wei Huang, Shui-Mu Lin, Chueh-Kuei Jan, Huan-Chien Yang
  • Circuit and Method for Controlling Light Emitting Device, and Integrated Circuit Therefor
    Publication number: 20110169423
    Abstract: The present invention provides a transistor switch on a light emitting device channel, the transistor switch receiving a control voltage VG. A current source circuit controls the current on the light emitting device channel, the current source circuit requiring a minimum voltage VR for normal operation. The present invention further provides a dynamic headroom controller circuit which compares a voltage VS at a current outflow end of the transistor switch with the voltage VR to determine the relationship between the voltage VS and the voltage VR when the control voltage VG is higher than a reference voltage VH, and adjusts the voltage difference between the voltage VS and the voltage VR accordingly.
    Type: Application
    Filed: March 27, 2011
    Publication date: July 14, 2011
    Inventors: Tsung-Wei Huang, Shui-Mu Lin, Nang-Ching Yeung, Ti-Ti Liu, Huan-Chien Yang
  • Non-synchronous boost converter including low-voltage device for load disconnection
    Patent number: 7898227
    Abstract: A non-synchronous boost converter includes a low-voltage device connected between the input voltage terminal and the output voltage terminal of the converter. When the converter is shutdown, the low-voltage device disconnects the output voltage terminal and the input voltage terminal. Since it is a low-voltage device used in the converter for load disconnection, the efficiency of the converter is improved with lower cost.
    Type: Grant
    Filed: January 6, 2009
    Date of Patent: March 1, 2011
    Assignee: Richtek Technology Corp.
    Inventors: Tsung-Wei Huang, Shui-Mu Lin, Jien-Sheng Chen, Kwan-Jen Chu
  • Charge pump regulator and method of producing a regulated voltage
    Patent number: 7888989
    Abstract: A charge pump regulator has a charge pump to establish a charge path and a discharge path alternately, so as to produce a regulated voltage on an output terminal. The charge pump has at least a current control element on the charge path or the discharge path to control the current flowing therethrough according to an output-dependent feedback signal.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: February 15, 2011
    Assignee: Richtek Technology Corp.
    Inventors: Shui-Mu Lin, Tsung-Wei Huang, Jien-Sheng Chen
  • LOW PIN COUNT LED DRIVER INTEGRATED CIRCUIT
    Publication number: 20110006697
    Abstract: A LED driver integrated circuit has a voltage input pin, a voltage output pin, a capacitor pin, and a switching circuit connected to the capacitor pin and the voltage output pin. The capacitor pin and the voltage output pin are for a flying capacitor to be connected therebetween, and thus the switching circuit and the flying capacitor establish a charge pump to convert an input voltage received by the voltage input pin into an output voltage at the voltage output pin.
    Type: Application
    Filed: July 7, 2010
    Publication date: January 13, 2011
    Applicant: RICHTEK TECHNOLOGY CORP.
    Inventors: TSUNG-WEI HUANG, SHUI-MU LIN, PAO-HSUN YU, YING-HSIN HSING
  • Dimming method and system thereof
    Patent number: 7825882
    Abstract: A dimming method for LED driving circuit is proposed. By temporary switching a pin that is originally used for the input/output of other electric signals to a high impedance node, the dimming control signal may be inputted to dim LEDs. The dimming method comprises the steps of: floating the pin every a period of time to pull the pin's voltage being equal to the dimming control signal; detecting the pin's voltage; and retrieving the dimming control signal in accordance with the detected pin's voltage and thereafter dimming the LEDs.
    Type: Grant
    Filed: February 9, 2007
    Date of Patent: November 2, 2010
    Assignee: Richtek Technology Corp.
    Inventors: Wei-Hsin Wei, Shui-Mu Lin, Chien-Sheng Chen, Tsung-Wei Huang, Chin-Chiang Yeh, Chin-Tsung Chen
  • CHARGE PUMP REGULATOR AND METHOD OF PRODUCING A REGULATED VOLTAGE
    Publication number: 20100156517
    Abstract: A charge pump regulator has a charge pump to establish a charge path and a discharge path alternately, so as to produce a regulated voltage on an output terminal. The charge pump has at least a current control element on the charge path or the discharge path to control the current flowing therethrough according to an output-dependent feedback signal.
    Type: Application
    Filed: March 8, 2010
    Publication date: June 24, 2010
    Applicant: RICHTEK TECHOLOGY CORP.
    Inventors: SHUI-MU LIN, TSUNG-WEI HUANG, JIEN-SHENG CHEN
  • CHARGE PUMP REGULATOR AND METHOD OF PRODUCING A REGULATED VOLTAGE
    Publication number: 20100156516
    Abstract: A charge pump regulator has a charge pump to establish a charge path and a discharge path alternately, so as to produce a regulated voltage on an output terminal. The charge pump has at least a current control element on the charge path or the discharge path to control the current flowing therethrough according to an output-dependent feedback signal.
    Type: Application
    Filed: March 8, 2010
    Publication date: June 24, 2010
    Applicant: RICHTEK TECHOLOGY CORP.
    Inventors: SHUI-MU LIN, TSUNG-WEI HUANG, JIEN-SHENG CHEN
  • CHARGE PUMP REGULATOR AND METHOD OF PRODUCING A REGULATED VOLTAGE
    Publication number: 20100156515
    Abstract: A charge pump regulator has a charge pump to establish a charge path and a discharge path alternately, so as to produce a regulated voltage on an output terminal. The charge pump has at least a current control element on the charge path or the discharge path to control the current flowing therethrough according to an output-dependent feedback signal.
    Type: Application
    Filed: March 8, 2010
    Publication date: June 24, 2010
    Applicant: RICHTEK TECHOLOGY CORP.
    Inventors: SHUI-MU LIN, TSUNG-WEI HUANG, JIEN-SHENG CHEN
  • CHARGE PUMP REGULATOR AND METHOD OF PRODUCING A REGULATED VOLTAGE
    Publication number: 20100156514
    Abstract: A charge pump regulator has a charge pump to establish a charge path and a discharge path alternately, so as to produce a regulated voltage on an output terminal. The charge pump has at least a current control element on the charge path or the discharge path to control the current flowing therethrough according to an output-dependent feedback signal.
    Type: Application
    Filed: March 8, 2010
    Publication date: June 24, 2010
    Applicant: RICHTEK TECHOLOGY CORP.
    Inventors: SHUI-MU LIN, TSUNG-WEI HUANG, JIEN-SHENG CHEN
  • Offset cancellation of a single-ended operational amplifier
    Patent number: 7714645
    Abstract: A single-ended operational amplifier includes an output stage, a first transconductance amplifier and a second transconductance amplifier. In an offset cancellation mode, two inputs of the first transconductance amplifier are supplied with a reference voltage to sink two currents from two inputs of the output stage respectively, the output stage generates a third current according to the difference between the two currents to charge a capacitor, and the second transconductance amplifier generates two currents according to the voltage in the capacitor to make currents in the two inputs of the output stage equal to each other, thereby canceling the offset of the single-ended operational amplifier.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: May 11, 2010
    Assignee: Richtek Technology Corp.
    Inventors: Shui-Mu Lin, Tsung-Wei Huang, Jien-Sheng Chen, Kwan-Jen Chu
  • Current regulator and method for efficiency improvement of a LED display system
    Publication number: 20100102731
    Abstract: For efficiency improvement of a LED display system including a charge pump and a LED connected to either the voltage input terminal or the voltage output terminal of the charge pump, either one or both of two current regulators are enabled according to a voltage detected from the LED, for establishing a driving current for the LED. When the detected voltage is higher than a threshold, the first one of the current sources is enabled sole. When the detected voltage is lower than the threshold, the second one of the current sources is enabled sole, or both the current sources are enabled, or the current sources are alternatively enabled.
    Type: Application
    Filed: October 26, 2009
    Publication date: April 29, 2010
    Inventors: Shui-Mu Lin, Tsung-Wei Huang, Jien-Sheng Chen
  • Single-wire transmission interface and method of transmission through single-wire
    Publication number: 20100054313
    Abstract: The present invention discloses a single-wire transmission interface, and a method of transmission through single-wire. The method comprises: providing a single-wire signal through a single-wire; and transmitting information only in a transmission period defined by a fixed first time period starting from one of a rising or a falling edge of the single-wire signal.
    Type: Application
    Filed: July 21, 2009
    Publication date: March 4, 2010
    Inventors: Kwan-Jen Chu, Tsung-Wei Huang, Jien-Sheng Chen, Pao-Hsun Yu