Patents by Inventor Wei-Chuan Su
Wei-Chuan Su 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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Publication number: 20240168324Abstract: A decoration panel includes a first substrate, a first transparent conductive element, a transparent structure, a second substrate, a second transparent conductive element, and a first cholesteric liquid crystal layer. The first transparent conductive element is disposed on the first substrate. The transparent structure is disposed on the first substrate. The second substrate is disposed opposite to the first substrate. The second transparent conductive element is disposed on the second substrate. The first cholesteric liquid crystal layer is disposed between the first transparent conductive element and the second transparent conductive element. A display apparatus is adapted to render a decoration pattern, and the decoration pattern corresponds to the transparent structure. Moreover, a display apparatus including the decoration panel is also provided.Type: ApplicationFiled: November 20, 2023Publication date: May 23, 2024Applicant: AUO CorporationInventors: Chien-Chuan Chen, Wei-Jen Su, Hsin Chiang Chiang, Chun-Han Lee, Peng-Yu Chen, Ko-Ruey Jen, Yung-Chih Chen
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Patent number: 11606038Abstract: A power converter and control circuit are provided. The control circuit has a power controller for turning on the power switch to maintain a desired output voltage and mode selection switch provides a mode selection signal. Depending on the magnitude of an input voltage of the power converter, in which the mode selection circuit compares the input voltage of the power converter with a reference voltage, a modulation controller is configured to turn on a modulation switch to activate the capacitor according to the mode selection signal.Type: GrantFiled: March 8, 2022Date of Patent: March 14, 2023Assignee: Diodes IncorporatedInventors: Wei Chuan Su, Feng-Jung Huang, Yuan-Hung Lo, Hao-Ming Chen
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Patent number: 11575316Abstract: A power converter includes a power switch controlling current flow in the power converter and a variable capacitance coupled in parallel to the power switch. The variable capacitance is configured to add a frequency jitter to the power converter.Type: GrantFiled: November 1, 2021Date of Patent: February 7, 2023Assignee: Diodes IncorporatedInventors: Wei Chuan Su, Feng-Jung Huang, Yuan-Hung Lo
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Publication number: 20220376627Abstract: A power converter and control circuit are provided. The control circuit has a power controller for turning on the power switch to maintain a desired output voltage and mode selection switch provides a mode selection signal. Depending on the magnitude of an input voltage of the power converter, in which the mode selection circuit compares the input voltage of the power converter with a reference voltage, a modulation controller is configured to turn on a modulation switch to activate the capacitor according to the mode selection signal.Type: ApplicationFiled: March 8, 2022Publication date: November 24, 2022Applicant: Diodes IncorporatedInventors: Wei Chuan Su, Feng-Jung Huang, Yuan-Hung Lo, Hao-Ming Chen
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Patent number: 11336190Abstract: A method for controlling a power converter includes turning on a power switch to maintain a desired output voltage, wherein the power switch is coupled to a primary winding to control a primary current flow and the output voltage is provided by a secondary winding. The method also includes adding a capacitance in parallel to the power switch at a time determined by a magnitude of an input voltage to the power converter. Here, the timing of adding the capacitance depends on the operation mode of the power controller. In a low input voltage mode, the capacitance is added in a demagnetization-time during which the secondary winding discharges. In a high input voltage mode, the capacitance is added in a discontinuous time.Type: GrantFiled: February 9, 2021Date of Patent: May 17, 2022Assignee: Diodes IncorporatedInventors: Wei Chuan Su, Feng-Jung Huang, Yuan-Hung Lo, Hao-Ming Chen
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Publication number: 20220085715Abstract: A power converter includes a power switch controlling current flow in the power converter and a variable capacitance coupled in parallel to the power switch. The variable capacitance is configured to add a frequency jitter to the power converter.Type: ApplicationFiled: November 1, 2021Publication date: March 17, 2022Applicant: Diodes IncorporatedInventors: Wei Chuan Su, Feng-Jung Huang, Yuan-Hung Lo
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Patent number: 11228240Abstract: A power converter includes a power switch controlling current flow in the power converter and a variable capacitance coupled in parallel to the power switch. The variable capacitance is configured to add a frequency jitter to the power converter.Type: GrantFiled: October 8, 2020Date of Patent: January 18, 2022Assignee: Diodes IncorporatedInventors: Wei Chuan Su, Feng-Jung Huang, Yuan-Hung Lo
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Publication number: 20210242789Abstract: A method for controlling a power converter includes turning on a power switch to maintain a desired output voltage, wherein the power switch is coupled to a primary winding to control a primary current flow and the output voltage is provided by a secondary winding. The method also includes adding a capacitance in parallel to the power switch at a time determined by a magnitude of an input voltage to the power converter. Here, the timing of adding the capacitance depends on the operation mode of the power controller. In a low input voltage mode, the capacitance is added in a demagnetization-time during which the secondary winding discharges. In a high input voltage mode, the capacitance is added in a discontinuous time.Type: ApplicationFiled: February 9, 2021Publication date: August 5, 2021Applicant: Diodes IncorporatedInventors: Wei Chuan Su, Feng-Jung Huang, Yuan-Hung Lo, Hao-Ming Chen
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Publication number: 20210028695Abstract: A power converter includes a power switch controlling current flow in the power converter and a variable capacitance coupled in parallel to the power switch. The variable capacitance is configured to add a frequency jitter to the power converter.Type: ApplicationFiled: October 8, 2020Publication date: January 28, 2021Applicant: Diodes IncorporatedInventors: Wei Chuan Su, Feng-Jung Huang, Yuan-Hung Lo
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Patent number: 10833578Abstract: A Quasi-Resonant (QR) converter includes a power switch controlling the primary current flow and a time-varying capacitance coupled in parallel to the power switch. The time-varying capacitance is configured to add a frequency jitter to the frequency switch of the converter.Type: GrantFiled: October 29, 2019Date of Patent: November 10, 2020Assignee: Diodes IncorporatedInventor: Wei Chuan Su
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Publication number: 20200287457Abstract: A Quasi-Resonant (QR) converter includes a power switch controlling the primary current flow and a time-varying capacitance coupled in parallel to the power switch. The time-varying capacitance is configured to add a frequency jitter to the frequency switch of the converter.Type: ApplicationFiled: October 29, 2019Publication date: September 10, 2020Applicant: Diodes IncorporatedInventor: Wei Chuan Su
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Patent number: 10691189Abstract: A power controller makes use of a line-voltage detection method to perform brown-out protection and brown-in mechanism. The power controller has a high-voltage node connected via a current-limiting resistor to a line voltage, and a high-voltage startup transistor connected to the high-voltage node. The input voltage at the high-voltage node is divided to provide a fraction result. An offset current flowing through the high-voltage startup transistor and the current-limiting resistor is provided in response to the fraction result. The offset current is stopped in response to the fraction result when the offset current flows through the high-voltage startup transistor and the current-limiting resistor.Type: GrantFiled: August 31, 2017Date of Patent: June 23, 2020Assignee: LEADTREND TECHNOLOGY CORPORATIONInventors: Wei Chuan Su, Meng Jen Tsai
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Publication number: 20180088651Abstract: A power controller makes use of a line-voltage detection method to perform brown-out protection and brown-in mechanism. The power controller has a high-voltage node connected via a current-limiting resistor to a line voltage, and a high-voltage startup transistor connected to the high-voltage node. The input voltage at the high-voltage node is divided to provide a fraction result. An offset current flowing through the high-voltage startup transistor and the current-limiting resistor is provided in response to the fraction result. The offset current is stopped in response to the fraction result when the offset current flows through the high-voltage startup transistor and the current-limiting resistor.Type: ApplicationFiled: August 31, 2017Publication date: March 29, 2018Inventors: Wei Chuan Su, Meng Jen Tsai
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Publication number: 20140340944Abstract: A method providing short-circuit protection and a flyback converter utilizing the same wire are disclosed. The a method, adopted by a flyback converter, includes a transformer, including generating a feedback voltage according to an output voltage output from a secondary winding of the transformer; controlling a primary current through a primary winding of the transformer based on the feedback voltage; determining a sense voltage according to the primary current; determining a short circuit based on the sense voltage; setting the primary current according to a short-circuit sense voltage limit when a short circuit occurs; and setting the primary current according to a normal sense voltage limit when a short circuit does not occur.Type: ApplicationFiled: April 29, 2014Publication date: November 20, 2014Applicant: NEOENERGY MICROELECTRONICS, INC.Inventors: Ren-Huei TZENG, Kuan-Sheng WANG, Wei-Chuan SU
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Patent number: 8665612Abstract: A constant current controller for a constant current power module, including: a demagnetization sensing unit, used for detecting the voltage variation of a detection signal to generate a discharging time signal having an active period corresponding to a secondary side discharging time, wherein the detection signal is derived from an auxiliary coil; a secondary side current sensing unit, used for detecting a peak value of a current sensing signal, and providing an output current according to the peak value of the current sensing signal under the control of the discharging time signal, wherein the current sensing signal is corresponding to a primary side current; and an error current generator, used for generating an error current according to the difference between the output current and a reference current, wherein the error current is converted to a threshold voltage by a first capacitor.Type: GrantFiled: July 10, 2012Date of Patent: March 4, 2014Assignee: Immense Advance Technology CorporationInventors: Wei-Chuan Su, Wei-Chun Hsiao
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Patent number: 8664870Abstract: A cascoded current regulator, including: a first load circuit, having a first load and a current source unit; and a second load circuit, being cascaded with the first load circuit and having a second load and a current mirror unit, wherein a first current flowing through the first load and a second current flowing through the current source unit are controlled by a control voltage, and a third current flowing through the second load and a fourth current flowing through the current mirror unit are generated according to the second current.Type: GrantFiled: March 23, 2012Date of Patent: March 4, 2014Assignee: Immense Advance Technology, CorporationInventors: Wei-Chuan Su, Pen-Li Chou, Yen-Hui Wang
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Publication number: 20140016366Abstract: A constant current controller for a constant current power module, including: a demagnetization sensing unit, used for detecting the voltage variation of a detection signal to generate a discharging time signal having an active period corresponding to a secondary side discharging time, wherein the detection signal is derived from an auxiliary coil; a secondary side current sensing unit, used for detecting a peak value of a current sensing signal, and providing an output current according to the peak value of the current sensing signal under the control of the discharging time signal, wherein the current sensing signal is corresponding to a primary side current; and an error current generator, used for generating an error current according to the difference between the output current and a reference current, wherein the error current is converted to a threshold voltage by a first capacitor.Type: ApplicationFiled: July 10, 2012Publication date: January 16, 2014Inventors: Wei-Chuan Su, Wei-Chun Hsiao
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Publication number: 20130249423Abstract: A cascoded current regulator, including: a first load circuit, having a first load and a current source unit; and a second load circuit, being cascaded with the first load circuit and having a second load and a current mirror unit, wherein a first current flowing through the first load and a second current flowing through the current source unit are controlled by a control voltage, and a third current flowing through the second load and a fourth current flowing through the current mirror unit are generated according to the second current.Type: ApplicationFiled: March 23, 2012Publication date: September 26, 2013Inventors: Wei-Chuan SU, Pen-Li CHOU, Yen-Hui WANG
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Patent number: 8541990Abstract: A power conversion controller having a novel power factor correction mechanism, including: a normalization unit, used to generate a normalized signal according to a line voltage by multiplying the line voltage with a normalizing gain, wherein the normalizing gain is proportional to the reciprocal of the amplitude of the line voltage; a reference current generation unit, coupled to the normalization unit to generate a reference current signal by performing an arithmetic operation, wherein the arithmetic operation involves the normalized signal; and a gate drive signal generation unit, used to generate a gate drive signal, wherein the duty of the gate drive signal is determined by a voltage comparison of the reference current signal and a current sensing signal.Type: GrantFiled: November 23, 2010Date of Patent: September 24, 2013Assignee: Immense Advance Technology Corp.Inventors: Ko-Yen Lee, Chia-Chieh Hung, Wei-Chuan Su
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Patent number: 8536850Abstract: A high side controller capable of sensing input voltage and output voltage of a power conversion circuit, including: a first switch, having a control end and two channel ends, the control end being coupled to a gate signal, and one of the two channel ends being coupled to a voltage signal, wherein the voltage signal is proportional to a negative version of the input voltage when the gate signal is active; an inverting amplification circuit, having an input end coupled to the other one of the two channel ends, and an output end for providing a first processed voltage; and a first sample and hold circuit, having a control input end coupled to the gate signal, an input end coupled to the first processed voltage, and an output end for providing a first sample voltage.Type: GrantFiled: September 13, 2010Date of Patent: September 17, 2013Assignee: Immense Advance Technology Corp.Inventors: Yen-Hui Wang, Wei-Chuan Su, Yu-Wen Chang