Patents by Inventor Jhih-Siou Cheng
Jhih-Siou Cheng 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: 11291095Abstract: A coupling compensation module is provided, for compensating a channel voltage of a channel outputted by a constant current circuit of a light emitting diode (LED) driver. The coupling compensation module includes a detecting circuit, for detecting a voltage variation of the channel voltage, to generate a detection result; and a compensation circuit, for compensating the voltage variation of the channel voltage according to the detection result.Type: GrantFiled: March 29, 2021Date of Patent: March 29, 2022Assignee: NOVATEK Microelectronics Corp.Inventors: Tso-Sheng Chan, Jin-Yi Lin, Chun-Fu Lin, Jhih-Siou Cheng, Yu-Sheng Ma
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Publication number: 20220093037Abstract: The present disclosure relates to a driving method for a display device and a display device. The display device includes a display driver, the display driver includes a plurality of driving channels each of which drives corresponding display unit according to display data in a pulse width modulation manner within one frame period, the method comprises: selectively enabling, in each sub-frame subset among a plurality of different sub-frame subsets of the frame period, different channel subset among a plurality of channel subsets of the plurality of driving channels to drive corresponding display unit, wherein each channel subset of the plurality of channel subsets includes two or more driving channels among the plurality of driving channels.Type: ApplicationFiled: July 30, 2021Publication date: March 24, 2022Inventors: Jhih-Siou Cheng, Chun-Fu Lin, Po-Hsiang Fang, Ju-Lin Huang
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Patent number: 11282438Abstract: A driver circuit configured to receive a display data and drive a display panel is provided. The display panel includes a plurality of light-emitting diode devices according to the display data. The driver circuit includes a data driver. The data driver is configured to output driving signals to drive the light-emitting diode devices according to the display data and operate in different operation modes according to a control signal. The data driver includes a plurality of output channels. The output channels output the driving signals to drive the light-emitting diode devices via respective output terminals of the driver circuit. An assignment relationship of the display data and the output channels is different in the different operation modes. A display apparatus including the driver circuit is also provided.Type: GrantFiled: July 1, 2020Date of Patent: March 22, 2022Assignee: Novatek Microelectronics Corp.Inventors: Chun-Wei Kang, Jhih-Siou Cheng, Chun-Fu Lin, Po-Hsiang Fang, Ju-Lin Huang
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Publication number: 20220083191Abstract: The present invention discloses a display panel and a display device. The display panel comprises a plurality of common electrode blocks and a plurality of display regions. During a display period, one or more common electrode blocks corresponding to one of the display regions which is to be displayed during the display period are coupled to a common voltage; and during the display period, one or more of the common electrode blocks corresponding to the display regions which are not to be displayed during the display period are kept in a floating state.Type: ApplicationFiled: November 22, 2021Publication date: March 17, 2022Inventors: Keko-Chun LIANG, Jhih-Siou CHENG, Hsu-Chih WEI, Jui-Chan CHANG, Ju-Lin HUANG, Po-Ying CHEN, Wen-Yi HSIEH
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Patent number: 11276346Abstract: A sensing circuit for an organic light-emitting diode driver includes a sample and hold circuit and a gain amplifier. The sample and hold circuit is configured to sample a sensing signal received via an input terminal. The gain amplifier is coupled to the sample and hold circuit. The sample and hold circuit includes a first capacitor, a second capacitor, a first switch, a second switch, a third switch and a fourth switch. The first capacitor is coupled between the input terminal and the gain amplifier. The second capacitor is coupled between a reference terminal and the gain amplifier. The first switch is connected between the first capacitor and the input terminal. The second switch is connected between the second capacitor and the reference terminal. The third switch is connected between the first capacitor and the gain amplifier. The fourth switch is connected between the second capacitor and the gain amplifier.Type: GrantFiled: January 21, 2019Date of Patent: March 15, 2022Assignee: NOVATEK Microelectronics Corp.Inventors: Jin-Yi Lin, Chieh-An Lin, Jhih-Siou Cheng, Ju-Lin Huang
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Patent number: 11244891Abstract: An integrated circuit package, a die carrier, and a die are provided. The die carrier includes at least one die pad and a plurality of leads. The at least one die pad is suitable for carrying the die. The leads surround the at least one die pad. The leads are disposed on four sides of the die carrier. A length of a long side among the four sides is twice or more a length of a short side among the four sides. The die carrier is suitable for a QFN package or a QFP package.Type: GrantFiled: July 21, 2020Date of Patent: February 8, 2022Assignee: NOVATEK MICROELECTRONICS CORP.Inventors: Jhih-Siou Cheng, Hong-Dyi Chang, Chun-Wei Kang, Chun-Fu Lin, Ju-Lin Huang
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Publication number: 20220028775Abstract: An integrated circuit package, a die carrier, and a die are provided. The die carrier includes at least one die pad and a plurality of leads. The at least one die pad is suitable for carrying the die. The leads surround the at least one die pad. The leads are disposed on four sides of the die carrier. A length of a long side among the four sides is twice or more a length of a short side among the four sides. The die carrier is suitable for a QFN package or a QFP package.Type: ApplicationFiled: July 21, 2020Publication date: January 27, 2022Applicant: Novatek Microelectronics Corp.Inventors: Jhih-Siou Cheng, Hong-Dyi Chang, Chun-Wei Kang, Chun-Fu Lin, Ju-Lin Huang
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Publication number: 20220020673Abstract: A quad flat no-lead (QFN) package structure including a lead frame, a semiconductor die, and an encapsulating material. The lead frame includes a die pad and a plurality of contacts surrounding the die pad. The semiconductor die is disposed on the die pad and electrically connected to the plurality of contacts, wherein a shortest distance between the semiconductor die and a first side of the die pad is shorter than a shortest distance between the semiconductor die to a second side of the die pad, and the first side is opposite to the second side. The encapsulating material encapsulates the lead frame and the semiconductor die and partially exposing the plurality of contacts, wherein an aspect ratio of the QFN package is substantially equal to or greater than 3.Type: ApplicationFiled: February 8, 2021Publication date: January 20, 2022Applicant: Novatek Microelectronics Corp.Inventors: Hong-Dyi Chang, Tai-Hung Lin, Jhih-Siou Cheng
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Patent number: 11217152Abstract: The present invention provides a source driver for driving a light emitting diode panel. The source driver includes a buffer including an output terminal; and a plurality of driving circuits coupled to the buffer. Each of the plurality of driving circuits includes a constant current transistor including a gate controlled by a node voltage of the output terminal of the buffer; and a compensation unit for compensating the node voltage of the output terminal of the buffer.Type: GrantFiled: December 3, 2020Date of Patent: January 4, 2022Assignee: NOVATEK Microelectronics Corp.Inventors: Yu-Sheng Ma, Jhih-Siou Cheng, Chun-Fu Lin, Tso-Sheng Chan, Ren-Chieh Yang
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Patent number: 11211016Abstract: A source driver is configured to drive an organic light-emitting diode (OLED) display panel. The source driver includes a sensing circuit and an operational amplifier. The sensing circuit is configured to sense pixel information of an OLED pixel circuit through a sensing line of the OLED display panel. The operational amplifier includes an amplifier circuit and at least one switch circuit. The amplifier circuit includes at least one gain circuit. An input terminal of the amplifier circuit is coupled to an output terminal of the sensing circuit. Each of the at least one switch circuit is coupled between a pair of output terminals of a corresponding one of the at least one gain circuit.Type: GrantFiled: July 16, 2019Date of Patent: December 28, 2021Assignee: Novatek Microelectronics Corp.Inventors: Chih-Hsien Chou, Jhih-Siou Cheng, Jin-Yi Lin
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Patent number: 11205382Abstract: A sensing circuit for an organic light-emitting diode (OLED) driver includes a sample and hold circuit and a clamping circuit. The sample and hold circuit includes a capacitor. The clamping circuit, coupled to the sample and hold circuit, is configured to clamp a sensing voltage received by the sample and hold circuit to conform to a withstand voltage of the capacitor.Type: GrantFiled: November 22, 2018Date of Patent: December 21, 2021Assignee: NOVATEK Microelectronics Corp.Inventors: Jhih-Siou Cheng, Po-Yu Tseng, Keko-Chun Liang, Ju-Lin Huang, Chih-Hsien Chou
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Publication number: 20210390901Abstract: The present invention provides a source driver for driving a light emitting diode panel. The source driver includes a buffer including an output terminal; and a plurality of driving circuits coupled to the buffer. Each of the plurality of driving circuits includes a constant current transistor including a gate controlled by a node voltage of the output terminal of the buffer; and a compensation unit for compensating the node voltage of the output terminal of the buffer.Type: ApplicationFiled: December 3, 2020Publication date: December 16, 2021Inventors: Yu-Sheng Ma, Jhih-Siou Cheng, Chun-Fu Lin, Tso-Sheng Chan, Ren-Chieh Yang
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Patent number: 11196397Abstract: The present invention includes a current integrator for an organic light-emitting diode (OLED) panel. The current integrator includes an operational amplifier, which includes an output stage. The output stage, coupled to an output terminal of the current integrator, includes a first output transistor, a second output transistor, a first stack transistor and a second stack transistor. The first stack transistor is coupled between the first output transistor and the output terminal. The second stack transistor is coupled between the second output transistor and the output terminal.Type: GrantFiled: December 31, 2019Date of Patent: December 7, 2021Assignee: NOVATEK Microelectronics Corp.Inventors: Chih-Wen Lu, Chieh-An Lin, Yen-Ru Kuo, Jhih-Siou Cheng, Ju-Lin Huang
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Publication number: 20210375200Abstract: The present invention provides a method of controlling a display panel. The display panel includes a plurality of subpixels and a plurality of scan lines coupled to the plurality of subpixels. The method includes steps of: scanning a first scan line among the plurality of scan lines to turn on at least one of the plurality of subpixels coupled to the first scan line during a subframe period among a display frame period; and discharging a second scan line among the plurality of scan lines during a non-display period following the subframe period. Wherein, the second scan line is different from the first scan line.Type: ApplicationFiled: February 7, 2021Publication date: December 2, 2021Inventors: Chun-Fu Lin, Jhih-Siou Cheng, Yu-Sheng Ma, Jin-Yi Lin
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Publication number: 20210350731Abstract: A source driver and a calibration method thereof are provided. The source driver for driving and sensing a display panel of the disclosure includes a sensing circuit, an analog-to-digital converter circuit and a digital arithmetic circuit. The sensing circuit is configured to receive a reference signal through a sensing channel when the source driver is operated in a calibration mode. The analog-to-digital converter circuit is coupled to the sensing circuit, and configured to convert the reference signal to a digital reference signal. The digital arithmetic circuit is coupled to the analog-to-digital converter circuit, and configured to obtain a calibration parameter according to the digital reference signal. The source driver calibrates a sensing path for sensing a display panel according to the calibration parameter when the source driver is operated in a sensing mode.Type: ApplicationFiled: May 5, 2020Publication date: November 11, 2021Applicant: Novatek Microelectronics Corp.Inventors: Yi-Yang Tsai, Po-Hsiang Fang, Jhih-Siou Cheng, Ju-Lin Huang
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Publication number: 20210343232Abstract: The present disclosure relates to a driver for driving a light emitting unit array of a display device, the driver including: a plurality of driving units, each of the plurality of driving units includes: a driving circuit configured to provide a driving current to a corresponding column of light emitting units in the light emitting unit array according to a pulse width modulation signal, during a turn-on period of a channel switch; a regulating circuit configured to be connected in parallel with the driving circuit and be turned on according to the pulse width modulation signal to form a path with the corresponding column of the light emitting units, such that a current associated with the light emitting units flows through the path.Type: ApplicationFiled: April 28, 2021Publication date: November 4, 2021Inventors: Yu-Sheng Ma, Jhih-Siou Cheng, Chun-Fu Lin, Jin-Yi Lin, Ju-Lin Huang
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Patent number: 11164507Abstract: An electronic device for driving a display panel and an operation method thereof are provided. The electronic device includes a first input terminal, a first circuit and a second circuit. The first input terminal receives a first sensing signal from a first sensing line of the sensing lines of the display panel. The first circuit generates a first signal according to the first sensing signal and provides a processing circuit with the first signal during a pre-processing period. The second circuit generates a second signal according to the first sensing signal and provides the processing circuit with the second signal during a normal processing period after the pre-processing period.Type: GrantFiled: March 4, 2020Date of Patent: November 2, 2021Assignee: Novatek Microelectronics Corp.Inventors: Po-Hsiang Fang, Jhih-Siou Cheng
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Publication number: 20210304675Abstract: A display driver and a display driving method are provided. The display driving is adapted for driving a display panel and sensing an electrical characteristic of the display panel. The display driver includes a first amplifier circuit. The first amplifier circuit is coupled to the display panel. The first amplifier circuit includes a first driving circuit, a first sensing circuit and a first operational amplifier. The first operational amplifier is coupled to the display panel through a first driving line and a first sensing line. The first driving circuit is configured to provide a first driving signal to the display panel through the first operational amplifier and the first driving line during a driving period. The first sensing circuit is configured to receive a first sensing signal from the display panel through the first operational amplifier and the first sensing line during a first sensing period.Type: ApplicationFiled: March 24, 2020Publication date: September 30, 2021Applicant: Novatek Microelectronics Corp.Inventors: Jhih-Siou Cheng, Po-Hsiang Fang, Chieh-An Lin, Keko-Chun Liang, Ju-Lin Huang
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Publication number: 20210304661Abstract: A driver circuit configured to receive a display data and drive a display panel is provided. The display panel includes a plurality of light-emitting diode devices according to the display data. The driver circuit includes a data driver. The data driver is configured to output driving signals to drive the light-emitting diode devices according to the display data and operate in different operation modes according to a control signal. The data driver includes a plurality of output channels. The output channels output the driving signals to drive the light-emitting diode devices via respective output terminals of the driver circuit. An assignment relationship of the display data and the output channels is different in the different operation modes. A display apparatus including the driver circuit is also provided.Type: ApplicationFiled: July 1, 2020Publication date: September 30, 2021Applicant: Novatek Microelectronics Corp.Inventors: Chun-Wei Kang, Jhih-Siou Cheng, Chun-Fu Lin, Po-Hsiang Fang, Ju-Lin Huang
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Patent number: 11069586Abstract: A chip-on-film package including a flexible substrate, first test pads, second test pads, first connecting wires, second connecting wires and a chip is provided. The flexible substrate includes at least one segment. Each segment has a central portion and a first side portion and a second side portion located at two opposite sides of the central portion. The chip disposed on the central portion includes first connecting pads and second connecting pads. The first test pads and the second test pads are disposed on the first side portion. Two ends of each of the first connecting wires are connected to the corresponding first connecting pad and the corresponding first test pad. Two ends of each of the second connecting wires are connected to the corresponding second connecting pad and the corresponding second test pad. Each of the second connecting wires includes a first section located at the second side portion.Type: GrantFiled: December 15, 2015Date of Patent: July 20, 2021Assignee: Novatek Microelectronics Corp.Inventors: Jhih-Siou Cheng, Chun-Yung Cho, Po-Yu Tseng