Patents by Inventor Nan-Chuan Huang
Nan-Chuan 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).
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Patent number: 9055637Abstract: An LED load driving apparatus including a power conversion circuit and a control chip is provided. The power conversion circuit receives an input voltage and drives an LED load in response to a PWM signal. The control chip includes a control core circuit and a memory unit. The control core circuit is operated under a system voltage to provide the PWM signal for controlling operation of the power conversion circuit. The control core circuit is inactivated during a power-off period and restarted during a power-on period. The memory unit is operated under the input voltage and is configured to: store a dimming operation data before the control core circuit is inactivated during the power-off period; and provide the stored dimming operation data during the power-on period to the control core circuit, so as to make the control core circuit perform corresponding dimming operation relating to the LED load.Type: GrantFiled: October 16, 2013Date of Patent: June 9, 2015Assignee: Beyond Innovation Technology Co., Ltd.Inventors: Nan-Chuan Huang, Fu-Kuo Yang
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Patent number: 9030116Abstract: A load driving apparatus and a driving method thereof are provided. The load driving apparatus includes a power conversion circuit and a control chip. The power conversion circuit receives a DC input voltage, and drives an LED load in response to a gate PWM signal. The control chip is configured to: provide the gate PWM signal having a first preset duty cycle during a light operation period of a dimming operation, so that the LED load is fully turned on; and provide the gate PWM signal having a second preset duty cycle during a dark operation period of the dimming operation, so that the LED load is slightly turned on. The second preset duty cycle is far less than the first preset duty cycle. A current of the LED load during the light operation period is far more than a current of the LED load during the dark operation period.Type: GrantFiled: October 18, 2013Date of Patent: May 12, 2015Assignee: Beyond Innovation Technology Co., Ltd.Inventors: Chiu-Yuan Lin, Nan-Chuan Huang, Chen-Lung Kao
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Patent number: 9013107Abstract: A load driving apparatus relating to light-emitting-diodes (LEDs) is provided. In the invention, a compensation voltage on a compensation pin (CMP) of a control chip would not be changed in response to (or with) the variation (i.e. enabling and disabling) of a pulse-width-modulation (PWM) signal for dimming. In other words, the compensation voltage on the compensation pin (CMP) of the control chip would be maintained in unchanging regardless of whether the PWM signal for dimming is enabled or disabled. Therefore, an LED string at the current switching transient does not have the generation of over-shoot current.Type: GrantFiled: October 15, 2013Date of Patent: April 21, 2015Assignee: Beyond Innovation Technology Co., Ltd.Inventors: Fu-Kuo Yang, Nan-Chuan Huang
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Publication number: 20140210350Abstract: A load driving apparatus relating to light-emitting-diodes (LEDs) is provided. In the invention, a compensation voltage on a compensation pin (CMP) of a control chip would not be changed in response to (or with) the variation (i.e. enabling and disabling) of a pulse-width-modulation (PWM) signal for dimming. In other words, the compensation voltage on the compensation pin (CMP) of the control chip would be maintained in unchanging regardless of whether the PWM signal for dimming is enabled or disabled. Therefore, an LED string at the current switching transient does not have the generation of over-shoot current.Type: ApplicationFiled: October 15, 2013Publication date: July 31, 2014Applicant: Beyond Innovation Technology Co., Ltd.Inventors: Fu-Kuo Yang, Nan-Chuan Huang
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Publication number: 20140191671Abstract: An LED load driving apparatus including a power conversion circuit and a control chip is provided. The power conversion circuit receives an input voltage and drives an LED load in response to a PWM signal. The control chip includes a control core circuit and a memory unit. The control core circuit is operated under a system voltage to provide the PWM signal for controlling operation of the power conversion circuit. The control core circuit is inactivated during a power-off period and restarted during a power-on period. The memory unit is operated under the input voltage and is configured to: store a dimming operation data before the control core circuit is inactivated during the power-off period; and provide the stored dimming operation data during the power-on period to the control core circuit, so as to make the control core circuit perform corresponding dimming operation relating to the LED load.Type: ApplicationFiled: October 16, 2013Publication date: July 10, 2014Applicant: Beyond Innovation Technology Co., Ltd.Inventors: Nan-Chuan Huang, Fu-Kuo Yang
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Publication number: 20140167637Abstract: A load driving apparatus and a driving method thereof are provided. The load driving apparatus includes a power conversion circuit and a control chip. The power conversion circuit receives a DC input voltage, and drives an LED load in response to a gate PWM signal. The control chip is configured to: provide the gate PWM signal having a first preset duty cycle during a light operation period of a dimming operation, so that the LED load is fully turned on; and provide the gate PWM signal having a second preset duty cycle during a dark operation period of the dimming operation, so that the LED load is slightly turned on. The second preset duty cycle is far less than the first preset duty cycle. A current of the LED load during the light operation period is far more than a current of the LED load during the dark operation period.Type: ApplicationFiled: October 18, 2013Publication date: June 19, 2014Applicant: Beyond Innovation Technology Co., Ltd.Inventors: Chiu-Yuan Lin, Nan-Chuan Huang, Chen-Lung Kao
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Publication number: 20140062319Abstract: A light emitting diode driving apparatus suitable for driving a light emitting diode string is provided. The light emitting diode driving apparatus includes a buck power conversion circuit and a control chip. The buck power conversion circuit is coupled to the light emitting diode string and has a power switch path. The control chip is coupled to the buck power conversion circuit, and is configured to control the operation of the buck power conversion circuit. The control chip has a ground pin, wherein the ground pin is indirectly connected to the power switch path and is in a floating state.Type: ApplicationFiled: July 16, 2013Publication date: March 6, 2014Inventors: Nan-Chuan Huang, Fu-Kuo Yang
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Patent number: 7023718Abstract: A two-phase driver comprises two H-bridge circuits each of them including a transformer and two switch assemblies connected to the opposite terminals of the primary side of the transformer, in which one of the switch assemblies is shared by the two H-bridge circuits. Each of the switch assemblies includes a high-side switch and a low-side switch, and each of the high-side switch and low-side switch is switched by a respective signal so as to modulate the loading currents supplied to two loading loops connected to the two H-bridge circuits, respectively.Type: GrantFiled: November 12, 2003Date of Patent: April 4, 2006Assignee: Richtek Technology Corp.Inventors: Nan-Chuan Huang, Chean-Lung Tsay
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Publication number: 20040095791Abstract: A two-phase driver comprises two H-bridge circuits each of them including a transformer and two switch assemblies connected to the opposite terminals of the primary side of the transformer, in which one of the switch assemblies is shared by the two H-bridge circuits. Each of the switch assemblies includes a high-side switch and a low-side switch, and each of the high-side switch and low-side switch is switched by a respective signal so as to modulate the loading currents supplied to two loading loops connected to the two H-bridge circuits, respectively.Type: ApplicationFiled: November 12, 2003Publication date: May 20, 2004Inventors: Nan-Chuan Huang, Chean-Lung Tsay