Patents by Inventor Xie-Ren Hsu
Xie-Ren Hsu 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: 9472156Abstract: The present invention discloses a gamma voltage generator of a display driving device. The gamma voltage generator comprises a first reference voltage generator; a switch coupled to the first reference voltage generator; and a plurality of resistors connected in serial and coupled to the switch; wherein the switch controls a connection between the first reference voltage generator and the plurality of resistors.Type: GrantFiled: August 10, 2015Date of Patent: October 18, 2016Assignee: NOVATEK Microelectronics Corp.Inventors: Xie-Ren Hsu, Wei-Song Huang
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Publication number: 20150364103Abstract: The present invention discloses a gamma voltage generator of a display driving device. The gamma voltage generator comprises a first reference voltage generator; a switch coupled to the first reference voltage generator; and a plurality of resistors connected in serial and coupled to the switch; wherein the switch controls a connection between the first reference voltage generator and the plurality of resistors.Type: ApplicationFiled: August 10, 2015Publication date: December 17, 2015Inventors: Xie-Ren Hsu, Wei-Song Huang
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Patent number: 9142168Abstract: The present invention discloses a driving device of a display device. The driving device comprises a gamma voltage generator, for generating a gamma voltage according to a control signal to a source driver of the display device, and a logic unit, for generating the control signal to the gamma voltage generator according to a difference among image properties of a plurality of frames to be displayed, to adjust the gamma voltage.Type: GrantFiled: June 27, 2011Date of Patent: September 22, 2015Assignee: NOVATEK Microelectronics Corp.Inventors: Xie-Ren Hsu, Wei-Song Huang
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Patent number: 9118287Abstract: An adaptive amplification circuit is provided, which includes an operational amplifier comprising a variable bias current source for providing a variable bias current for the operational amplifier, an equivalent circuit of the operational amplifier for receiving an input voltage and generating an output voltage according to the input voltage, and a bias control unit for generating a bias control signal to the variable bias current source according to the output voltage so as to adjust the variable bias current.Type: GrantFiled: August 20, 2013Date of Patent: August 25, 2015Assignee: NOVATEK Microelectronics Corp.Inventors: Xie-Ren Hsu, Chia-Hung Lin, Wei-Hsiang Hung
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Publication number: 20140285260Abstract: An output buffer circuit of a source driver includes an operational amplifier, having a first terminal as an output of the operational amplifier, and an output control unit, coupled between the output terminal of the operational amplifier and a second terminal for driving a load, to generate a variable impedance of a signal output path between the first terminal and the second terminal, wherein when the operational amplifier charges or discharges the second terminal to reach a predetermined level, the output control unit change a value of the variable impedance of the signal output path.Type: ApplicationFiled: June 3, 2014Publication date: September 25, 2014Applicant: NOVATEK Microelectronics Corp.Inventors: Xie-Ren Hsu, Ji-Ting Chen, Yao-Hung Kuo
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Patent number: 8803600Abstract: An output buffer circuit capable of enhancing stability includes an operational amplifier, a capacitive load and an output control unit. The operational amplifier has a positive input terminal, a negative input terminal and an output terminal, and generates an output voltage to the output terminal according to an input voltage received by the positive input terminal. The output control unit is coupled between the output terminal of the operational amplifier and the capacitive load, and is utilized for controlling electrical connection between the output terminal of the operational amplifier and the capacitive load to form a signal output path and for adjusting impedance of the signal output path when the signal output path is formed. The output control unit comprises a plurality of output switches for individually turning on or off the electrical connection between the output terminal and the capacitive load of the operational amplifier.Type: GrantFiled: August 23, 2012Date of Patent: August 12, 2014Assignee: NOVATEK Microelectronics Corp.Inventors: Xie-Ren Hsu, Ji-Ting Chen, Yao-Hung Kuo
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Publication number: 20130328631Abstract: An adaptive amplification circuit is provided, which includes an operational amplifier comprising a variable bias current source for providing a variable bias current for the operational amplifier, an equivalent circuit of the operational amplifier for receiving an input voltage and generating an output voltage according to the input voltage, and a bias control unit for generating a bias control signal to the variable bias current source according to the output voltage so as to adjust the variable bias current.Type: ApplicationFiled: August 20, 2013Publication date: December 12, 2013Applicant: NOVATEK Microelectronics Corp.Inventors: Xie-Ren Hsu, Chia-Hung Lin, Wei-Hsiang Hung
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Patent number: 8542063Abstract: An adaptive amplification circuit is disclosed, which includes an operational amplifier including a variable bias current source for providing a variable bias current for the operational amplifier, a simulation unit for simulating operational characteristics of the operational amplifier and transforming a simulation input voltage to a simulation output voltage, and a bias control unit for generating a bias control signal to the variable bias current source according to the simulation output voltage so as to adjust the variable bias current.Type: GrantFiled: August 2, 2011Date of Patent: September 24, 2013Assignee: NOVATEK Microelectronics Corp.Inventors: Xie-Ren Hsu, Chia-Hung Lin, Wei-Hsiang Hung
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Patent number: 8487687Abstract: An output buffer circuit for avoiding voltage overshoot includes an input stage, an output bias circuit, an output stage, a clamp circuit, and a control unit. The input stage includes a positive input terminal, for receiving an input voltage, and a negative input terminal. The input stage generates a current signal according to the input voltage. The output bias circuit is coupled to the input stage, for generating a dynamic bias according to the current signal. The output stage is coupled to the input stage and the output bias circuit, including an output terminal, reversely coupled to the positive input terminal, and at least one output transistor, coupled to the output bias circuit and the output terminal, for providing a driving current to the output terminal according to the dynamic bias to generate an output voltage.Type: GrantFiled: March 30, 2010Date of Patent: July 16, 2013Assignee: NOVATEK Microelectronics Corp.Inventors: Xie-Ren Hsu, Ji-Ting Chen
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Publication number: 20120319770Abstract: An output buffer circuit capable of enhancing stability includes an operational amplifier, a capacitive load and an output control unit. The operational amplifier has a positive input terminal, a negative input terminal and an output terminal, and generates an output voltage to the output terminal according to an input voltage received by the positive input terminal. The output control unit is coupled between the output terminal of the operational amplifier and the capacitive load, and is utilized for controlling electrical connection between the output terminal of the operational amplifier and the capacitive load to form a signal output path and for adjusting impedance of the signal output path when the signal output path is formed. The output control unit comprises a plurality of output switches for individually turning on or off the electrical connection between the output terminal and the capacitive load of the operational amplifier.Type: ApplicationFiled: August 23, 2012Publication date: December 20, 2012Inventors: Xie-Ren Hsu, Ji-Ting Chen, Yao-Hung Kuo
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Patent number: 8278999Abstract: An output buffer circuit capable of enhancing stability includes an operational amplifier, a capacitive load and an output control unit. The operational amplifier has a positive input terminal, a negative input terminal and an output terminal, and generates an output voltage to the output terminal according to an input voltage received by the positive input terminal. The output control unit is coupled between the output terminal of the operational amplifier and the capacitive load, and is utilized for controlling electrical connection between the output terminal of the operational amplifier and the capacitive load to form a signal output path and for adjusting impedance of the signal output path when the signal output path is formed.Type: GrantFiled: January 26, 2011Date of Patent: October 2, 2012Assignee: Novatek Microelectronics Corp.Inventors: Xie-Ren Hsu, Ji-Ting Chen, Yao-Hung Kuo
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Publication number: 20120223975Abstract: The present invention discloses a driving device of a display device. The driving device comprises a gamma voltage generator, for generating a gamma voltage according to a control signal to a source driver of the display device, and a logic unit, for generating the control signal to the gamma voltage generator according to a difference among image properties of a plurality of frames to be displayed, to adjust the gamma voltage.Type: ApplicationFiled: June 27, 2011Publication date: September 6, 2012Inventors: Xie-Ren Hsu, Wei-Song Huang
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Publication number: 20120146720Abstract: An adaptive amplification circuit is disclosed, which includes an operational amplifier including a variable bias current source for providing a variable bias current for the operational amplifier, a simulation unit for simulating operational characteristics of the operational amplifier and transforming a simulation input voltage to a simulation output voltage, and a bias control unit for generating a bias control signal to the variable bias current source according to the simulation output voltage so as to adjust the variable bias current.Type: ApplicationFiled: August 2, 2011Publication date: June 14, 2012Inventors: Xie-Ren Hsu, Chia-Hung Lin, Wei-Hsiang Hung
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Publication number: 20120133632Abstract: An operation amplifier, coupled to a control unit, includes: a differential input pair, coupled to an input signal and an output signal; a bias current source, couple to the differential input pair; an output stage, coupled to the bias current source; and a clamp circuit, coupled to the output stage. In discharge, when the control circuit is temporarily short circuit, an internal charge share inside the operational amplifier transiently lowers a first node voltage of the output stage and the clamp circuit pulls high the first node voltage of the output stage. In charge, when the control circuit is temporarily short circuit, an internal charge share inside the operational amplifier transiently pulls high a second node voltage of the output stage and the clamp circuit pulls low the second node voltage of the output stage.Type: ApplicationFiled: November 23, 2011Publication date: May 31, 2012Applicant: NOVATEK MICROELECTRONICS CORP.Inventor: Xie-Ren HSU
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Publication number: 20110187457Abstract: An output buffer circuit capable of enhancing stability includes an operational amplifier, a capacitive load and an output control unit. The operational amplifier has a positive input terminal, a negative input terminal and an output terminal, and generates an output voltage to the output terminal according to an input voltage received by the positive input terminal. The output control unit is coupled between the output terminal of the operational amplifier and the capacitive load, and is utilized for controlling electrical connection between the output terminal of the operational amplifier and the capacitive load to forma signal output path and for adjusting impedance of the signal output path when the signal output path is formed.Type: ApplicationFiled: January 26, 2011Publication date: August 4, 2011Inventors: Xie-Ren Hsu, Ji-Ting Chen, Yao-Hung Kuo
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Publication number: 20110181336Abstract: An output buffer circuit for avoiding voltage overshoot includes an input stage, an output bias circuit, an output stage, a clamp circuit, and a control unit. The input stage includes a positive input terminal, for receiving an input voltage, and a negative input terminal. The input stage generates a current signal according to the input voltage. The output bias circuit is coupled to the input stage, for generating a dynamic bias according to the current signal. The output stage is coupled to the input stage and the output bias circuit, including an output terminal, reversely coupled to the positive input terminal, and at least one output transistor, coupled to the output bias circuit and the output terminal, for providing a driving current to the output terminal according to the dynamic bias to generate an output voltage.Type: ApplicationFiled: March 30, 2010Publication date: July 28, 2011Inventors: Xie-Ren Hsu, Ji-Ting Chen
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Publication number: 20110063520Abstract: A multimedia system includes a multimedia device and a remote control device. The multimedia device includes a trigger element, a detection unit and a wireless transmitter. The trigger element is utilized for generating a trigger signal. The detection unit is coupled to the trigger element, and is utilized for generating a searching signal when the trigger signal is detected. The wireless transmitter is coupled to the detection unit, and is utilized for wirelessly transmitting the searching signal. The remote control device is utilized for wirelessly transmitting a remote control signal to control operations of the multimedia device. The remote control device includes a wireless receiver and an alarm unit. The wireless receiver is utilized for receiving the searching signal. The alarm unit is coupled to the wireless receiver, and is utilized for generating an alarm effect according to the searching signal.Type: ApplicationFiled: May 3, 2010Publication date: March 17, 2011Inventor: Xie-Ren Hsu
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Publication number: 20110040563Abstract: A voice control device for a display device includes a voice receiver for receiving a voice signal, a voice recognition unit coupled to the voice receiver for recognizing the voice signal to generate a recognition result, a function decision unit coupled to the voice recognition unit for selecting an operating function from a plurality of operating functions according to the recognition result, and an execution unit coupled to the function decision unit for controlling the display device to perform the operating function.Type: ApplicationFiled: February 5, 2010Publication date: February 17, 2011Inventors: Xie-Ren Hsu, Kuang-Feng Sung
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Patent number: RE47743Abstract: An output buffer circuit for avoiding voltage overshoot includes an input stage, an output bias circuit, an output stage, a clamp circuit, and a control unit. The input stage includes a positive input terminal, for receiving an input voltage, and a negative input terminal. The input stage generates a current signal according to the input voltage. The output bias circuit is coupled to the input stage, for generating a dynamic bias according to the current signal. The output stage is coupled to the input stage and the output bias circuit, including an output terminal, reversely coupled to the positive input terminal, and at least one output transistor, coupled to the output bias circuit and the output terminal, for providing a driving current to the output terminal according to the dynamic bias to generate an output voltage.Type: GrantFiled: July 16, 2015Date of Patent: November 26, 2019Assignee: NOVATEK Microelectronics Corp.Inventors: Xie-Ren Hsu, Ji-Ting Chen