Patents by Inventor Jung-hoon Sul
Jung-hoon Sul 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: 11936372Abstract: A slew rate adjusting circuit includes an adjustment transistor configured to provide an adjustment current into an output port of an arithmetic amplifier, a first transistor connected between a power line of the arithmetic amplifier and the adjustment transistor, and a second transistor connected between the first transistor and an output node of the output port, wherein the adjustment transistor is turned on by the second transistor in response to a difference between an input voltage and an output voltage being equal to or greater than a reference voltage, and the adjustment current is provided to the output port in response to the adjustment transistor being turned on.Type: GrantFiled: March 22, 2023Date of Patent: March 19, 2024Assignee: MagnaChip Semiconductor, Ltd.Inventors: Jung Hoon Sul, Dong Il Seo
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Patent number: 11907602Abstract: A multi-vision display device includes a timing controller, a plurality of display panels, and a plurality of display driver integrated circuits (ICs). The timing controller is configured to receive source data and timing signals from a host, and generate a data packet comprising image data and control data. The plurality of display driver ICs each is connected to any one of the plurality of display panels. The control data includes a panel identifier indicating a number of display panels of the plurality of display panels connected to the display driver IC prior to a corresponding display panel connected to the display driver IC. Adjacent ones of the plurality of display driver ICs are connected to each other, modulate the panel identifier provided from one among the timing controller and a front end display driver IC, and provide the modulated panel identifier to a rear end display driver IC.Type: GrantFiled: December 28, 2020Date of Patent: February 20, 2024Assignee: Magnachip Semiconductor, Ltd.Inventors: Jung Hoon Sul, Myung Woo Lee, Seung Ryeol Lee, Duk Min Lee
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Publication number: 20230223935Abstract: A slew rate adjusting circuit includes an adjustment transistor configured to provide an adjustment current into an output port of an arithmetic amplifier, a first transistor connected between a power line of the arithmetic amplifier and the adjustment transistor, and a second transistor connected between the first transistor and an output node of the output port, wherein the adjustment transistor is turned on by the second transistor in response to a difference between an input voltage and an output voltage being equal to or greater than a reference voltage, and the adjustment current is provided to the output port in response to the adjustment transistor being turned on.Type: ApplicationFiled: March 22, 2023Publication date: July 13, 2023Applicant: Magnachip Semiconductor, Ltd.Inventors: Jung Hoon SUL, Dong Il SEO
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Patent number: 11663994Abstract: A device for driving a display panel includes a display driving integrated circuit (IC) configured to transmit image data to the display panel, a display control IC configured to receive compressed image data from a host and including a timing controller configured to control the display driving IC, and a non-volatile memory configured to transmit data to and receive data from the display control IC, and configured to store driving parameters necessary for operation of the display driving IC.Type: GrantFiled: April 28, 2020Date of Patent: May 30, 2023Assignee: MagnaChip Semiconductor, Ltd.Inventors: Jin Seok Yang, Jung Hoon Sul, Sang Kyung Kim, Dae Young Yoo, Jae Won Kim
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Patent number: 11641199Abstract: A slew rate adjusting circuit includes an adjustment transistor configured to provide an adjustment current into an output port of an arithmetic amplifier, a first transistor connected between a power line of the arithmetic amplifier and the adjustment transistor, and a second transistor connected between the first transistor and an output node of the output port, wherein the adjustment transistor is turned on by the second transistor in response to a difference between an input voltage and an output voltage being equal to or greater than a reference voltage, and the adjustment current is provided to the output port in response to the adjustment transistor being turned on.Type: GrantFiled: March 26, 2020Date of Patent: May 2, 2023Assignee: MagnaChip Semiconductor, Ltd.Inventors: Jung Hoon Sul, Dong Il Seo
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Publication number: 20210365230Abstract: A multi-vision display device includes a timing controller, a plurality of display panels, and a plurality of display driver integrated circuits (ICs). The timing controller is configured to receive source data and timing signals from a host, and generate a data packet comprising image data and control data. The plurality of display driver ICs each is connected to any one of the plurality of display panels. The control data includes a panel identifier indicating a number of display panels of the plurality of display panels connected to the display driver IC prior to a corresponding display panel connected to the display driver IC. Adjacent ones of the plurality of display driver ICs are connected to each other, modulate the panel identifier provided from one among the timing controller and a front end display driver IC, and provide the modulated panel identifier to a rear end display driver IC.Type: ApplicationFiled: December 28, 2020Publication date: November 25, 2021Applicant: Magnachip Semiconductor, Ltd.Inventors: Jung Hoon SUL, Myung Woo LEE, Seung Ryeol LEE, Duk Min LEE
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Publication number: 20210005169Abstract: A device for driving a display panel includes a display driving integrated circuit (IC) configured to transmit image data to the display panel, a display control IC configured to receive compressed image data from a host and including a timing controller configured to control the display driving IC, and a non-volatile memory configured to transmit data to and receive data from the display control IC, and configured to store driving parameters necessary for operation of the display driving IC.Type: ApplicationFiled: April 28, 2020Publication date: January 7, 2021Applicant: MagnaChip Semiconductor, Ltd.Inventors: Jin Seok YANG, Jung Hoon SUL, Sang Kyung KIM, Dae Young YOO, Jae Won KIM
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Publication number: 20200389165Abstract: A slew rate adjusting circuit includes an adjustment transistor configured to provide an adjustment current into an output port of an arithmetic amplifier, a first transistor connected between a power line of the arithmetic amplifier and the adjustment transistor, and a second transistor connected between the first transistor and an output node of the output port, wherein the adjustment transistor is turned on by the second transistor in response to a difference between an input voltage and an output voltage being equal to or greater than a reference voltage, and the adjustment current is provided to the output port in response to the adjustment transistor being turned on.Type: ApplicationFiled: March 26, 2020Publication date: December 10, 2020Applicant: Magnachip Semiconductor, Ltd.Inventors: Jung Hoon SUL, Dong Il SEO
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Patent number: 10180407Abstract: A capacitor type humidity sensor is provided, where a reference capacitor (CR) is provided as an MIM (metal insulator metal) capacitor or a PIP (polysilicon insulator polysilicon) capacitor. The MIM capacitor or PIP capacitor is aligned in array structure to enable the trimming. The capacitor type humidity sensor includes a sensing capacitor (CS) connected between negative (?) drive voltage terminal (?VDRV) and an inverting terminal (?) of an operational amplifier, and a reference capacitor (CR) connected between positive (+) drive voltage terminal (+VDRV) and an output node (a) of the sensing capacitor (CS), wherein the sensing capacitor (CS) is configured to trim the reference capacitor (CR).Type: GrantFiled: April 2, 2015Date of Patent: January 15, 2019Assignee: Haechitech CorporationInventors: Jung Hoon Sul, Tak Jun Oh
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Patent number: 9384854Abstract: A Complementary Metal-Oxide-Semiconductor (CMOS) analog switch has a circuit structure such that when a supply voltage is applied, the CMOS analog switch biases voltages at both ends of a Metal-Oxide-Semiconductor Field Effect Transistor (MOS) device, which switches on upon application of supply voltage, to a substrate node of MOS, or biases the substrate voltage of MOS device to a ground voltage state during a switching-off operation. The substrate voltage of MOS device in floating state is still biased to the ground voltage state even when abnormal, high voltages are applied to both ends of the MOS device. As a result, threshold voltage and conduction resistance decrease compared to related analog switches, and frequency bandwidth increases.Type: GrantFiled: May 14, 2014Date of Patent: July 5, 2016Assignee: Magnachip Semiconductor, Ltd.Inventors: Brandon Kwon, Jung Hoon Sul
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Publication number: 20150369768Abstract: A capacitor type humidity sensor is provided, where a reference capacitor (CR) is provided as an MIM (metal insulator metal) capacitor or a PIP (polysilicon insulator polysilicon) capacitor. The MIM capacitor or PIP capacitor is aligned in array structure to enable the trimming. The capacitor type humidity sensor includes a sensing capacitor (CS) connected between negative (?) drive voltage terminal (?VDRV) and an inverting terminal (?) of an operational amplifier, and a reference capacitor (CR) connected between positive (+) drive voltage terminal (+VDRV) and an output node (a) of the sensing capacitor (CS), wherein the sensing capacitor (CS) is configured to trim the reference capacitor (CR).Type: ApplicationFiled: April 2, 2015Publication date: December 24, 2015Applicant: MAGNACHIP SEMICONDUCTOR, LTD.Inventors: Jung Hoon SUL, Tak Jun OH
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Patent number: 9135870Abstract: A source driver, a controller, and a method for driving a source drive are provided. The source driver includes a controller configured to receive a start pulse signal, and generate and output one of a new start pulse signal if the start pulse signal is received, and an internal start pulse signal if the start pulse signal is not received, a shift register configured to receive video data, store the video data, and output the video data if the outputted start pulse signal is received by the shift register, a digital-to-analog converter (DAC) configured to convert the video data output from the shift register into an analog voltage signal, and output the analog voltage signal, and an output buffer configured to buffer the analog voltage signal output from the DAC, and output the buffered analog voltage signal.Type: GrantFiled: February 6, 2012Date of Patent: September 15, 2015Assignee: Magnachip Semiconductor Ltd.Inventors: Jin-cho Choi, Jeong-soo Kang, Jung-hoon Sul, Jung-hyun Kim, Kyu-young Chung
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Patent number: 9024675Abstract: There is provided a multi power supply type level shifter. The provided multi power supply type level shifter includes a first level shifter and a second level shifter in a two-stage architecture so as to selectively receive first to third power supplies and change a signal level, even when the first to third power supplies are applied in a different sequence from a normal power-on sequence. Output voltages are output without a change in level, and short-circuit currents are not generated in the first and second level shifters.Type: GrantFiled: March 24, 2014Date of Patent: May 5, 2015Assignee: MagnaChip Semiconductor, Ltd.Inventors: Jung Hoon Sul, Brandon Kwon
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Publication number: 20150008978Abstract: A Complementary Metal-Oxide-Semiconductor (CMOS) analog switch has a circuit structure such that when a supply voltage is applied, the CMOS analog switch biases voltages at both ends of a Metal-Oxide-Semiconductor Field Effect Transistor (MOS) device, which switches on upon application of supply voltage, to a substrate node of MOS, or biases the substrate voltage of MOS device to a ground voltage state during a switching-off operation. The substrate voltage of MOS device in floating state is still biased to the ground voltage state even when abnormal, high voltages are applied to both ends of the MOS device. As a result, threshold voltage and conduction resistance decrease compared to related analog switches, and frequency bandwidth increases.Type: ApplicationFiled: May 14, 2014Publication date: January 8, 2015Applicant: MagnaChip Semiconductor, Ltd.Inventors: Brandon KWON, Jung Hoon SUL
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Publication number: 20140375373Abstract: There is provided a multi power supply type level shifter. The provided multi power supply type level shifter includes a first level shifter and a second level shifter in a two-stage architecture so as to selectively receive first to third power supplies and change a signal level, even when the first to third power supplies are applied in a different sequence from a normal power-on sequence. Output voltages are output without a change in level, and short-circuit currents are not generated in the first and second level shifters.Type: ApplicationFiled: March 24, 2014Publication date: December 25, 2014Applicant: MAGNACHIP SEMICONDUCTOR, LTD.Inventors: Jung Hoon SUL, Brandon KWON
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Publication number: 20120200770Abstract: A source driver, a controller, and a method for driving a source drive are provided. The source driver includes a controller configured to receive a start pulse signal, and generate and output one of a new start pulse signal if the start pulse signal is received, and an internal start pulse signal if the start pulse signal is not received, a shift register configured to receive video data, store the video data, and output the video data if the outputted start pulse signal is received by the shift register, a digital-to-analog converter (DAC) configured to convert the video data output from the shift register into an analog voltage signal, and output the analog voltage signal, and an output buffer configured to buffer the analog voltage signal output from the DAC, and output the buffered analog voltage signal.Type: ApplicationFiled: February 6, 2012Publication date: August 9, 2012Applicant: MAGNACHIP SEMICONDUCTOR, LTD.Inventors: Jin-cho Choi, Jeong-soo Kang, Jung-hoon Sul, Jung-hyun Kim, Kyu-young Chung