Patents by Inventor Yu-Yuan Chang

Yu-Yuan Chang 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: 20120173898
    Abstract: A remote-controlled computer system includes a computer system electrically linked to a remote control device. The remote control device receives a manual operation to generate a manual trigger signal sent to the computer system. The computer system includes a motherboard, a power supply and a status control unit. The motherboard receives continuously the manual trigger signal and sends a power ON/OFF signal to start or stop the power supply. The power supply provides electric power to the motherboard for booting and a power activating signal to the motherboard. The status control unit is electrically connected to the motherboard, power supply and remote control device. The status control unit receives the manual trigger signal from the remote control device and transmits to the motherboard. The status control unit also detects absence of the power activating signal output from the power supply and stops sending the manual trigger signal.
    Type: Application
    Filed: January 5, 2011
    Publication date: July 5, 2012
    Inventors: Tsun-Te SHIH, Yu-Yuan Chang, Chia-Lun Liu, Kuang-Lung Shih
  • Publication number: 20120033450
    Abstract: A multiple power supplies balance system includes a plurality of power supply circuits on a circuit board each having a power output route. Each power supply circuit includes a power supply feedback unit which has a reference level terminal to determine output potential of the power supply circuit. The circuit board also has an output route electrically connected to the power output route to converge current sending to a load. Thus the circuit board contains multiple sets of power supply circuits coupled in parallel. The circuit board also has a proportion distribution circuit to correct output variations of each power supply circuit. The proportion distribution circuit includes a variable impedance element which is electrically connected to the reference level terminals and controllable to proportionally change equivalent impedance connected to each reference level terminal, thus change proportionally output potential of each power supply circuit.
    Type: Application
    Filed: August 4, 2010
    Publication date: February 9, 2012
    Inventors: Tsun-Te SHIH, Yu-Yuan Chang, Tien-Wei Chang
  • Publication number: 20110304312
    Abstract: In a power circuit for reducing standby power consumption, a power supply is defined to include a primary power system and a stationary power system. The stationary power system outputs a stationary power after obtaining an input power. A control unit controls ON/OFF of the primary power system, obtains the stationary power as the required power, and receives a PS ON/OFF signal for triggering the control unit, so that the control unit controls the primary power system to supply a primary output power. The power supply includes a switch unit having two ends connected to a power circuit for outputting the stationary power and a virtual load respectively. The PS ON/OFF signal is provided for controlling the switch unit. If the switch unit does not receive the PS ON/OFF signal, it is OFF in a standby mode to avoid unnecessary power consumption of the virtual load.
    Type: Application
    Filed: June 15, 2010
    Publication date: December 15, 2011
    Inventors: Tsun-Te SHIH, Yu-Yuan Chang, Yi-Hua Wang, Heng-Chia Chang
  • Patent number: 8072194
    Abstract: A boost snubber circuit structure applied in a power supply having a boost circuit and a power conversion unit, wherein the boost circuit includes a boost unit connected to a switch element, a boost control unit for generating a driving signal to drive the switch element to control the charge/discharge of the boost unit, and a boost snubber unit for obtaining a voltage difference between a reference voltage and a detection signal and modulating the magnitude of the reference voltage or the detection signal to change the voltage difference and control the duration of outputting the driving signal. The voltage difference between the reference voltage and the detection signal determines the duration of outputting the driving signal. By controlling the voltage difference between the detection signal and the boost level, the invention prevents an occurrence of an inrush current caused by a too-large duration of generating the driving signal.
    Type: Grant
    Filed: August 4, 2008
    Date of Patent: December 6, 2011
    Assignee: Zippy Technology Corp.
    Inventors: Yu-Yuan Chang, Heng-Chia Chang
  • Publication number: 20110145620
    Abstract: The present invention discloses a method of using a power supply to perform far-end monitoring of an electronic system. The electronic system has at least one power supply. The power supply has a signal integration unit receiving working parameters of the electronic system and a communication unit transmitting the working parameters to a communication network. The method of the present invention comprises steps: setting warning conditions, collecting working parameters, performing judgment, and performing far-end warning. The warning conditions are defined and stored in the signal integration unit. The signal integration unit collects the working parameters of the electronic system persistently. When determining that at least one of the working parameter meets the warning conditions, the signal integration unit generates a warning signal. The communication unit receives the warning signal and transmits the warning signal to the communication network.
    Type: Application
    Filed: December 15, 2009
    Publication date: June 16, 2011
    Inventors: Tsun-Te SHIH, Yu-Yuan Chang, Yi-Hua Wang, Yu-Lung Huang, Chia-Lun Liu, Tsung-Chun Chen
  • Patent number: 7956549
    Abstract: A power conversion structure includes a power factor correction circuit which has an energy storage coil, a switch and a voltage boosting control unit. The voltage boosting control unit drives the switch to set OFF and ON of the switch to change the period of current passing through the energy storage coil to alter the phase of the current. The energy storage coil is coupled with at least one induction coil to induce and generate driving power to energize lighting equipment. The amount of the driving power is determined by the coil ratio of the induction coil and the energy storage coil. Through the induction coil, the energy storage coil can be induced to generate the driving power which is determined by the coil ratio of the induction coil and energy storage coil.
    Type: Grant
    Filed: July 16, 2008
    Date of Patent: June 7, 2011
    Assignee: Zippy Technology Corp.
    Inventors: Chin-Biau Chung, Tsai-Shiuan Hung, Yu-Yuan Chang
  • Publication number: 20110074212
    Abstract: A power supply with an integrated power system has a common transformer. After the power supply receives input power, the common transformer generates an induction power at the secondary side. The power supply further includes a standby power system receiving the induction power and outputting a standby power, an actuation switch with one end electrically bridging the common transformer and the standby power system, a primary power system connecting to the other end of the actuation switch, and a power management unit receives the standby power to be activated. The standby power system modulates and transforms the induction power to the standby power to start operation of the power management unit. Users can trigger the power management unit to output an enabling signal to conduct the actuation switch to be ON so that the primary power system can receive the induction power and transform to output the primary output power.
    Type: Application
    Filed: September 25, 2009
    Publication date: March 31, 2011
    Inventors: Yi-Hua WANG, Yu-Yuan Chang
  • Patent number: 7903437
    Abstract: The present invention discloses a frequency-changing voltage regulation circuit, which applies to a power supply device that has a booster unit and a power conversion unit. The booster unit modulates an input power and converts the input power into a boosted power. The boost control circuit is coupled to the frequency-changing voltage regulation circuit of the present invention. The frequency-changing voltage regulation circuit comprises: a voltage detection circuit and a frequency setting circuit. The voltage detection circuit detects the input power sent to the booster unit and generates an input level signal according to the value of the input power. The frequency setting circuit generates a reference frequency signal corresponding to the input level signal and uses the reference frequency signal to modulate the frequency that the booster unit performs power conversion.
    Type: Grant
    Filed: April 21, 2008
    Date of Patent: March 8, 2011
    Assignee: Zippy Technology Corp.
    Inventors: Yu-Yuan Chang, Yi-Hua Wang
  • Patent number: 7898784
    Abstract: A protection circuit with variable current level limits is coupled to between a power supply system and a load. The power supply system outputs power to drive the load. The protection circuit with variable current level limits of the present invention comprises: a current level limiting switch unit which is coupled to between the power supply system and the load to conduct the output power, a detection unit which detects the current value of the output power, a current level setting unit which sets a normal-state current level limit and a transient-state current level limit according to the current value of the output power, a current level setting unit which checks the current value of the output power and controls the current level limiting switch unit to limit the current value and a timer unit.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: March 1, 2011
    Assignee: Zippy Technology Corp.
    Inventor: Yu-Yuan Chang
  • Patent number: 7843083
    Abstract: The present invention includes plural power supplying units, a power distributing backplane and more than one protection circuits, wherein the power supplying unit produces an output power and the power distributing backplane integrates the output powers from plural power supplying units and distributes thereof into plural driving powers for supplying loads. The power circuit for the driving power to drive each load has a protection circuit mounted thereon, wherein the protection circuit detects a driving condition of the load or the power circuit, and according thereto, the protection circuit becomes open or close so as to disconnect or maintain the driving power. Therefore, the abnormal driving power will not influence the operation of the whole power system and other normal loads still can maintain operation. Furthermore, since plural power supplying units are used to provide the power needed by loads, the power capacity will not be wasted.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: November 30, 2010
    Assignee: Zippy Technology Corp.
    Inventor: Yu-Yuan Chang
  • Patent number: 7723866
    Abstract: A power backup system includes a temporary power supply system and a power source switch unit. The power backup system is connected to at least one regular power supply system. In the event that output power of the regular power supply system is abnormal the power source switch unit is connected to the temporary power supply system and output of the regular power supply system. When the regular power supply system is in normal operation it is selected to provide power to drive loads. In the event of power interruption, unstable voltage or abnormal operating condition of the regular power supply system an action to switch power supply system takes places to select the temporary power supply system to maintain power supply and keep the loads to function for a selected time period.
    Type: Grant
    Filed: August 14, 2007
    Date of Patent: May 25, 2010
    Assignee: Zippy Technology Corp.
    Inventor: Yu-Yuan Chang
  • Publication number: 20100026274
    Abstract: A boost snubber circuit structure applied in a power supply having a boost circuit and a power conversion unit, wherein the boost circuit includes a boost unit connected to a switch element, a boost control unit for generating a driving signal to drive the switch element to control the charge/discharge of the boost unit, and a boost snubber unit for obtaining a voltage difference between a reference voltage and a detection signal and modulating the magnitude of the reference voltage or the detection signal to change the voltage difference and control the duration of outputting the driving signal. The voltage difference between the reference voltage and the detection signal determines the duration of outputting the driving signal. By controlling the voltage difference between the detection signal and the boost level, the invention prevents an occurrence of an inrush current caused by a too-large duration of generating the driving signal.
    Type: Application
    Filed: August 4, 2008
    Publication date: February 4, 2010
    Inventors: Yu-Yuan Chang, Heng-Chia Chang
  • Publication number: 20100013397
    Abstract: A power conversion structure includes a power factor correction circuit which has an energy storage coil, a switch and a voltage boosting control unit. The voltage boosting control unit drives the switch to set OFF and ON of the switch to change the period of current passing through the energy storage coil to alter the phase of the current. The energy storage coil is coupled with at least one induction coil to induce and generate driving power to energize lighting equipment. The amount of the driving power is determined by the coil ratio of the induction coil and the energy storage coil. Through the induction coil, the energy storage coil can be induced to generate the driving power which is determined by the coil ratio of the induction coil and energy storage coil.
    Type: Application
    Filed: July 16, 2008
    Publication date: January 21, 2010
    Inventors: Chin-Biau CHUNG, Tsai-Shiuan HUNG, Yu-Yuan CHANG
  • Publication number: 20090261789
    Abstract: The present invention discloses a frequency-changing voltage regulation circuit, which applies to a power supply device that has a booster unit and a power conversion unit. The booster unit modulates an input power and converts the input power into a boosted power. The boost control circuit is coupled to the frequency-changing voltage regulation circuit of the present invention. The frequency-changing voltage regulation circuit comprises: a voltage detection circuit and a frequency setting circuit. The voltage detection circuit detects the input power sent to the booster unit and generates an input level signal according to the value of the input power. The frequency setting circuit generates a reference frequency signal corresponding to the input level signal and uses the reference frequency signal to modulate the frequency that the booster unit performs power conversion.
    Type: Application
    Filed: April 21, 2008
    Publication date: October 22, 2009
    Inventors: Yu-Yuan CHANG, Yi-Hua Wang
  • Patent number: 7602621
    Abstract: A half bridge converter having a pulse width control unit, a level regulating unit, a half bridge switch unit, an electricity converting unit and a feedback unit is disclosed. The level regulating unit receives a first DC electricity and boosting the first DC electricity to a working voltage level for forming a working electricity. The pulse width control unit produces a conduction cycle signal for controlling the half bridge switch unit to switch the working electricity to a conduction timing of the electricity converting unit, so that the electricity converting unit converts the working electricity to output a second DC electricity. The feedback unit draws a feedback signal from the second DC electricity to send to the level regulating unit for altering the voltage of the working electricity, so as to adjust the output of the electricity converting unit, thereby achieving voltage regulation.
    Type: Grant
    Filed: December 27, 2007
    Date of Patent: October 13, 2009
    Assignee: Zippy Technology Corp.
    Inventor: Yu-Yuan Chang
  • Publication number: 20090207545
    Abstract: A protection circuit with variable current level limits is coupled to between a power supply system and a load. The power supply system outputs power to drive the load. The protection circuit with variable current level limits of the present invention comprises: a current level limiting switch unit which is coupled to between the power supply system and the load to conduct the output power, a detection unit which detects the current value of the output power, a current level setting unit which sets a normal-state current level limit and a transient-state current level limit according to the current value of the output power, a current level setting unit which checks the current value of the output power and controls the current level limiting switch unit to limit the current value and a timer unit.
    Type: Application
    Filed: February 14, 2008
    Publication date: August 20, 2009
    Inventor: Yu-Yuan CHANG
  • Publication number: 20090206671
    Abstract: The present invention includes plural power supplying units, a power distributing backplane and more than one protection circuits, wherein the power supplying unit produces an output power and the power distributing backplane integrates the output powers from plural power supplying units and distributes thereof into plural driving powers for supplying loads. The power circuit for the driving power to drive each load has a protection circuit mounted thereon, wherein the protection circuit detects a driving condition of the load or the power circuit, and according thereto, the protection circuit becomes open or close so as to disconnect or maintain the driving power. Therefore, the abnormal driving power will not influence the operation of the whole power system and other normal loads still can maintain operation. Furthermore, since plural power supplying units are used to provide the power needed by loads, the power capacity will not be wasted.
    Type: Application
    Filed: February 15, 2008
    Publication date: August 20, 2009
    Inventor: Yu-Yuan CHANG
  • Publication number: 20090168466
    Abstract: A half bridge converter having a pulse width control unit, a level regulating unit, a half bridge switch unit, an electricity converting unit and a feedback unit is disclosed. The level regulating unit receives a first DC electricity and boosting the first DC electricity to a working voltage level for forming a working electricity. The pulse width control unit produces a conduction cycle signal for controlling the half bridge switch unit to switch the working electricity to a conduction timing of the electricity converting unit, so that the electricity converting unit converts the working electricity to output a second DC electricity. The feedback unit draws a feedback signal from the second DC electricity to send to the level regulating unit for altering the voltage of the working electricity, so as to adjust the output of the electricity converting unit, thereby achieving voltage regulation.
    Type: Application
    Filed: December 27, 2007
    Publication date: July 2, 2009
    Inventor: Yu-Yuan CHANG
  • Patent number: 7542310
    Abstract: The present invention discloses a synchronous rectification control circuit, comprising at least one switch unit, a pulse width control unit, a transformer, a first rectification unit, a second rectification unit, a plurality of driving units, a logic operation unit and a signal transmission unit. The logic operation unit is used for receiving a working cycle signal generated by the pulse width control unit. When the working cycle signal is changed, the signal transmission unit transmits a switching signal for changing the working conditions of the first and second rectification units at a secondary side of the transformer, so as to switch the first and second rectification units before the switch unit operates and prevent possible short circuits or overlaps.
    Type: Grant
    Filed: May 2, 2007
    Date of Patent: June 2, 2009
    Assignee: Zippy Technology Corp.
    Inventor: Yu-Yuan Chang
  • Publication number: 20090058187
    Abstract: The present invention includes at least one power transformation device, a redundant power module to output a redundant power and an electric power distribution unit. The redundant power module includes at least an energy storage module. The power transformation device receives an input power and generates a transformed power. The power transformation device and the redundant power module are connected to the electric power distribution unit. The electric power distribution unit has a first end connecting to a power output end and a second end to receive output of the power transformation device and the redundant power module. Thereby outputs of the power transformation device and the redundant power module can be distributed to generate an output power to ensure that redundant power is provided to maintain a buffer time period in the event of power interruption or malfunction occurred to power transformation device.
    Type: Application
    Filed: September 5, 2007
    Publication date: March 5, 2009
    Inventor: Yu-Yuan Chang