Patents by Inventor Yih-Long Tseng
Yih-Long Tseng 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: 10685619Abstract: A driving method for a display apparatus is provided. The display apparatus includes data lines, scan lines and pixel units. Each pixel unit includes a pixel electrode and a common electrode. The driving method includes the following steps: when the display apparatus enters from a first frame period into a second frame period, switching a voltage level of a common voltage from a first common voltage level to a second common voltage level, and simultaneously changing a voltage level of the pixel electrode; during a data period of the second frame period, driving the scan lines according to a scanning sequence so as to write display data transmitted by data lines into the pixel units; and during a reset period of the second frame period, driving the scan lines according to the scanning sequence so as to write reset data transmitted by the data lines into the pixel units.Type: GrantFiled: March 21, 2018Date of Patent: June 16, 2020Assignees: Himax Display, Inc., HIMAX TECHNOLOGIES LIMITEDInventors: Yuet Wing Li, Kuan-Hsu Fan-Chiang, Yih-Long Tseng, Ming-Cheng Chiu
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Patent number: 10573266Abstract: A display panel driving apparatus and method are provided. The display panel driving apparatus includes a timing control circuit, a memory, a compensation circuit and a data driving circuit. The memory provides at least one coupling-capacitance information between a current pixel and at least one adjacent pixel in a display panel. By using the coupling-capacitance information, the compensation circuit compensates the current pixel data to obtain the compensated pixel data for compensating the voltage offset of the current pixel caused by the coupling voltage of the adjacent pixel. The data driving circuit drives the current pixel according to the compensated pixel data.Type: GrantFiled: August 8, 2017Date of Patent: February 25, 2020Assignee: HIMAX TECHNOLOGIES LIMITEDInventors: Yih-Long Tseng, Ming-Cheng Chiu
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Publication number: 20190051261Abstract: A display panel driving apparatus and method are provided. The display panel driving apparatus includes a timing control circuit, a memory, a compensation circuit and a data driving circuit. The memory provides at least one coupling-capacitance information between a current pixel and at least one adjacent pixel in a display panel. By using the coupling-capacitance information, the compensation circuit compensates the current pixel data to obtain the compensated pixel data for compensating the voltage offset of the current pixel caused by the coupling voltage of the adjacent pixel. The data driving circuit drives the current pixel according to the compensated pixel data.Type: ApplicationFiled: August 8, 2017Publication date: February 14, 2019Applicant: HIMAX TECHNOLOGIES LIMITEDInventors: Yih-Long Tseng, Ming-Cheng Chiu
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Publication number: 20180330691Abstract: A driving method for a display apparatus is provided. The display apparatus includes data lines, scan lines and pixel units. Each pixel unit includes a pixel electrode and a common electrode. The driving method includes the following steps: when the display apparatus enters from a first frame period into a second frame period, switching a voltage level of a common voltage from a first common voltage level to a second common voltage level, and simultaneously changing a voltage level of the pixel electrode; during a data period of the second frame period, driving the scan lines according to a scanning sequence so as to write display data transmitted by data lines into the pixel units; and during a reset period of the second frame period, driving the scan lines according to the scanning sequence so as to write reset data transmitted by the data lines into the pixel units.Type: ApplicationFiled: March 21, 2018Publication date: November 15, 2018Inventors: Yuet Wing LI, Kuan-Hsu Fan-Chiang, Yih-Long Tseng, Ming-Cheng Chiu
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Patent number: 8982029Abstract: A pixel circuitry of a display device and a display method thereof are provided herein. The pixel circuitry includes a scan switch, a storage element, and a sampling circuitry. The scan switch has a first terminal coupled to a data line and configured to be asserted according to a scan signal. The storage element is coupled to a second terminal of the scan switch and configured to store a pixel voltage from the data line. The sampling circuitry is configured to sample the stored pixel voltage of the storage element and to obtain a reference voltage for the display device according to the sampled signal. By sampling the stored pixel voltage of the storage element, whether the pixel voltages with different polarities are symmetry can be detected for avoiding flickers.Type: GrantFiled: May 15, 2009Date of Patent: March 17, 2015Assignee: Himax Display, Inc.Inventors: Biing-Seng Wu, Hon-Yuan Leo, Cheng-Chi Yen, Yih-Long Tseng, Yung-Yuan Ho, Yen-Chen Chen
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Patent number: 8415896Abstract: A current-type driver of light emitting devices is provided. The current-type driver includes a power conversion circuit, a feedback module, and a control module. The power conversion circuit modulates and generates an output voltage according to a feedback signal so as to sequentially drive a plurality of light emitting devices. The feedback module generates the feedback signal for the power conversion circuit according to the output voltage and an adjusting signal during a first period, wherein none of the light emitting devices is driven during the first period. The control module outputs the adjusting signal to the feedback module during the first period so as to allow the power conversion circuit to adjust the output voltage to a pre-drive voltage corresponding to the light emitting device which is to be driven next among the light emitting devices.Type: GrantFiled: July 1, 2010Date of Patent: April 9, 2013Assignee: Himax Display, Inc.Inventors: Yih-Long Tseng, Shwang-Shi Bai, Hon-Yuan Leo, Ying-Jhong Tseng
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Publication number: 20110089859Abstract: A current-type driver of light emitting devices is provided. The current-type driver includes a power conversion circuit, a feedback module, and a control module. The power conversion circuit modulates and generates an output voltage according to a feedback signal so as to sequentially drive a plurality of light emitting devices. The feedback module generates the feedback signal for the power conversion circuit according to the output voltage and an adjusting signal during a first period, wherein none of the light emitting devices is driven during the first period. The control module outputs the adjusting signal to the feedback module during the first period so as to allow the power conversion circuit to adjust the output voltage to a pre-drive voltage corresponding to the light emitting device which is to be driven next among the light emitting devices.Type: ApplicationFiled: July 1, 2010Publication date: April 21, 2011Applicant: HIMAX DISPLAY, INC.Inventors: Yih-Long Tseng, Shwang-Shi Bai, Hon-Yuan Leo, Ying-Jhong Tseng
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Publication number: 20100289734Abstract: A pixel circuitry of a display device and a display method thereof are provided herein. The pixel circuitry includes a scan switch, a storage element, and a sampling circuitry. The scan switch has a first terminal coupled to a data line and configured to be asserted according to a scan signal. The storage element is coupled to a second terminal of the scan switch and configured to store a pixel voltage from the data line. The sampling circuitry is configured to sample the stored pixel voltage of the storage element and to obtain a reference voltage for the display device according to the sampled signal. By sampling the stored pixel voltage of the storage element, whether the pixel voltages with different polarities are symmetry can be detected for avoiding flickers.Type: ApplicationFiled: May 15, 2009Publication date: November 18, 2010Applicant: Himax Display, Inc.Inventors: BIING-SENG WU, Hon-Yuan Leo, Cheng-Chi Yen, Yih-Long Tseng, Yung-Yuan Ho, Yen-Chen Chen
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Patent number: 7683607Abstract: A connection testing apparatus, a connection testing method, and a chip using the same are provided. The method can be used for testing connections between chips, so as to solve the problems that a conventional multi-chip connection test needs a plenty of test patterns, resulting in a long test time and a high test cost, and the condition of a connection failure is hard to be analyzed after a test failure. In the present invention, a voltage variation caused when an ESD element in a chip is conducted and a comparison circuits are used to determine whether a connection is correct. Furthermore, the test apparatus is built in the chip, so that the connection test may be accomplished quickly and efficiently. Once a connection failure occurs, the failed connection pin can also be found, so as to be favorable for engineering analysis and thereby effectively saving the test cost.Type: GrantFiled: September 25, 2007Date of Patent: March 23, 2010Assignee: Himax Display, Inc.Inventors: Ju-Tien Cheng, Yih-Long Tseng, Hon-Yuan Leo, Cheng-Chi Yen
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Publication number: 20090267877Abstract: The LCoS panel includes a display region, an odd and an even data drivers, and a data-line testing unit. The display region includes a plurality of pixel cells formed at each intersection of a plurality of scan lines and a plurality of data lines. The data lines include a plurality of odd data lines coupled to a plurality of first data channels of the odd data driver, and the data lines include a plurality of even data lines coupled to a plurality of second data channels of the even data driver. The odd and the even data drivers are arranged in a first side of the display region. The data-line testing unit is arranged in a second side of the display region opposite to the first side for selectively outputting a data-line testing signal corresponding to one of the data lines according to a data-line selecting signal.Type: ApplicationFiled: April 29, 2008Publication date: October 29, 2009Applicant: HIMAX DISPLAY, INC.Inventors: Cheng-Chi Yen, Yih-Long Tseng, Hon-Yuan Leo, Ju-Tien Cheng
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Publication number: 20090207098Abstract: A portable electronic device capable of displaying high resolution image is provided. The portable electronic device includes: a processor for providing a first video signal and a second video signal, wherein the first video signal is for displaying control options for selection, and the second video signal is generated according to a selected one of the control options; a display panel for displaying a first image with the control options according to the first video signal; a frame rate converter (FRC) for converting the second video signal into a third video signal; and a projector, independent of said display panel, for projecting a second image according to the third video signal, wherein the second image being controlled by the control options displayed on the display panel.Type: ApplicationFiled: February 29, 2008Publication date: August 20, 2009Applicant: HIMAX DISPLAY, INC.Inventors: Yih-Long Tseng, Yung-Yuan Ho
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Publication number: 20090079457Abstract: A connection testing apparatus, a connection testing method, and a chip using the same are provided. The method can be used for testing connections between chips, so as to solve the problems that a conventional multi-chip connection test needs a plenty of test patterns, resulting in a long test time and a high test cost, and the condition of a connection failure is hard to be analyzed after a test failure. In the present invention, a voltage variation caused when an ESD element in a chip is conducted and a comparison circuits are used to determine whether a connection is correct. Furthermore, the test apparatus is built in the chip, so that the connection test may be accomplished quickly and efficiently. Once a connection failure occurs, the failed connection pin can also be found, so as to be favorable for engineering analysis and thereby effectively saving the test cost.Type: ApplicationFiled: September 25, 2007Publication date: March 26, 2009Applicant: HIMAX DISPLAY, INC.Inventors: Ju-Tien Cheng, Yih-Long Tseng, Hon-Yuan Leo, Cheng-Chi Yen