Patents by Inventor Cheng-Han Tsao
Cheng-Han Tsao 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: 8049739Abstract: A liquid crystal display includes a light source for emitting light, a first substrate, a second substrate parallel to and facing the first substrate, and a plurality of pixel units formed between the first substrate and the second substrate. At least one pixel unit comprises a reflecting element disposed on the first substrate for reflecting light from the light source, and a photo-sensing element, formed on the second substrate, for outputting a sensing parameter based on light reflected from the reflecting member. Each reflecting element is extended out of the first substrate and faces to one of the plurality of photo-sensing elements. A position of the force applied on the first substrate is determined by detecting a variation of the sensing parameter outputted by the photo-sensing element.Type: GrantFiled: April 16, 2007Date of Patent: November 1, 2011Assignee: AU Optronics Corp.Inventors: Jeng-fang Wu, Cheng-han Tsao, Yen-ting Chen, Yi-pai Huang, Ting-jui Chang
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Publication number: 20110149223Abstract: A pixel structure including a substrate, a scan line, a data line, an active device, a capacitor electrode line, an upper electrode pattern and a pixel electrode is described. The scan line and the data line are disposed on the substrate. The active device is electrically connected to the scan line and the data line. The capacitor electrode is disposed on the substrate. The upper electrode pattern is disposed above the capacitor electrode line, and the upper electrode pattern has a first opening therein to expose the capacitor electrode pattern. The pixel electrode is electrically connected with the active device and covers the capacitor electrode line and the upper electrode pattern, wherein the pixel electrode has a middle portion and a plurality of branches connecting to the middle portion, and the middle portion has a second opening therein to expose the first opening.Type: ApplicationFiled: April 7, 2010Publication date: June 23, 2011Applicant: AU OPTRONICS CORPORATIONInventors: Cheng-Han Tsao, Ting-Yi Cho, Chung-Yi Chiu
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Patent number: 7944424Abstract: A pixel control device and a display apparatus utilizing said pixel control device are provided. The pixel control device is electrically connected to a sub-pixel area to provide a first voltage level, a second voltage level, and a third voltage level to the sub-pixel area, so that liquid crystals can be disposed in various angles. A scan line of the pixel control device controls a first transistor, a second transistor, and a third transistor to be switched on. The first and second data lines thereof provide a first and a second data-referenced voltage levels, respectively, to determine the first, the second, and the third voltage levels.Type: GrantFiled: August 15, 2007Date of Patent: May 17, 2011Assignee: Au Optronics Corp.Inventors: Cheng-Han Tsao, Yi-Pai Huang, Ting-Jui Chang, Hou Lung Hou
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Patent number: 7852422Abstract: A thin film transistor (TFT) array substrate including a substrate, scan lines and data lines both disposed on the substrate, and pixel structures is provided. A plurality of pixel areas is defined by the scan lines and the data lines on the substrate. Each scan line has a driving signal input terminal and an end terminal. Each pixel area includes a first sub-pixel area and a second sub-pixel area. The pixel structures are respectively disposed in the pixel areas and driven by the scan lines and the data lines. Each pixel structure in the respective pixel area includes a first TFT corresponding to the first sub-pixel area and a second TFT corresponding to the second sub-pixel area. Besides, ratios of a channel width to a channel length of the second TFTs connected to the same scan line increase gradually from the driving signal input terminal to the end terminal.Type: GrantFiled: April 24, 2007Date of Patent: December 14, 2010Assignee: Au Optronics CorporationInventors: Cheng-Han Tsao, Yi-Pai Huang, Ting-Jui Chang
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Publication number: 20100245222Abstract: An active array substrate, a liquid crystal display panel and method for driving the same are provided. The active array substrate includes a plurality of first strip electrodes and second strip electrodes. The sum of one width of the first stripe electrode and one pitch between two adjacent first stripe electrodes is greater than that of one width of the second strip electrode and one pitch between two adjacent second strip electrodes.Type: ApplicationFiled: October 27, 2009Publication date: September 30, 2010Applicant: AU OPTRONICS CORP.Inventors: Ting-Yi Cho, Chieh-Wei Chen, Te-Wei Chan, Cheng-Han Tsao, Kung-Ching Chu, Chung-Yi Chiu
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Publication number: 20100240273Abstract: A method for manufacturing a liquid crystal display panel including the steps is provided. A semi-finished liquid crystal display panel including a first substrate, a second substrate, a liquid crystal layer, an opposing electrode, scan lines, data lines, polymerizable molecules, pixel structures, first capacitor bottom electrodes, and second capacitor bottom electrodes is provided. Each pixel structure has a first pixel electrode and a second pixel electrode, and the blocks of the liquid crystal layer corresponding to the first pixel electrodes and the second pixel electrodes are respectively a plurality of first blocks and a plurality of second blocks. Then, a first voltage difference and a second voltage difference are respectively formed in the first blocks and the second blocks respectively, wherein the first voltage difference is different from the second voltage difference. Accordingly, the polymerizable molecules are polymerized to form the liquid crystal display panel.Type: ApplicationFiled: June 4, 2010Publication date: September 23, 2010Applicant: AU OPTRONICS CORPORATIONInventors: Te-Wei Chan, Chieh-Wei Chen, Cheng-Han Tsao, Chung-Yi Chiu
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Patent number: 7768489Abstract: A method for driving a normal black type liquid crystal display (LCD) includes driving the LCD by applying uncompensated source signals corresponding to gray levels; recording first optimized common signal voltages (Vcom-opt1) of common signals corresponding with the gray levels; adjusting the source signal to drive the LCD so second optimized common signal voltages (Vcom-opt2) of common signals corresponding with the gray levels conform to the following conditions: (1) when the gray level is lower than a predetermined gray level, the Vcom-opt2 exceeds a predetermined voltage of the common signal and the absolute difference between the Vcom-opt2 and the predetermined voltage is less than or equal to that between the Vcom-opt1 and the predetermined voltage; and (2) when the gray level exceeds the predetermined gray level, the absolute difference between the Vcom-opt2 and the predetermined voltage is less than or equal to that between the Vcom-opt1 and the predetermined voltage.Type: GrantFiled: November 2, 2006Date of Patent: August 3, 2010Assignee: Au Optronics Corp.Inventors: Pin-Miao Liu, Cheng-Han Tsao, Po-Lun Chen
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Patent number: 7737940Abstract: A liquid crystal display includes a source driver, a gate driver, a plurality of pixel units, a plurality of detecting circuits, and a decision unit. Each pixel unit includes a switch transistor and a liquid crystal capacitor. When turned on by a scan signal generated by the gate driver, the switch transistor conducts a data signal voltage generated by the source driver to the liquid crystal capacitor, to adjust alignment of liquid crystal molecules. Each detecting circuit is electrically connected to one pixel unit, and includes a first transistor, a second transistor, a third transistor and a sensor unit. The first transistor conducts a constant voltage to the sensor unit when turned on, and generates a dynamic voltage when turned off. Based on the dynamic voltage, the second transistor generates a dynamic current. The third transistor conducts the dynamic current to the decision unit when turned on.Type: GrantFiled: August 28, 2007Date of Patent: June 15, 2010Assignee: AU Optronics Corp.Inventors: Jeng-fang Wu, Cheng-han Tsao, Chih-wei Wang, Yen-ting Chen, Kun-hua Tsai, Yi-pai Huang, Chi-mao Hung, Ting-jui Chang, Ming-sheng Lai, Min-feng Chiang, Po-yuan Liu, Chun-ting Liu
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Patent number: 7646463Abstract: A pixel structure including a first active device, a second active device, a first pixel electrode electrically connecting the first active device, a second pixel electrode electrically connecting the second active device and a first capacitance lower electrode is provided. Both the first active device and the second active device electrically connect a scan line and a data line. The first pixel electrode has a first interlacing pattern and first stripe patterns connected thereto. The second pixel electrode has a second interlacing pattern and second stripe patterns connected thereto. The first capacitance lower electrode located under the first interlacing pattern has a first region and second regions. The first pixel electrode substantially shields the first region but does not shield the second regions. An area ratio of the first region to the second regions is about 10:1˜300:1.Type: GrantFiled: March 3, 2008Date of Patent: January 12, 2010Assignee: Au Optronics CorporationInventors: Chieh-Wei Chen, Cheng-Han Tsao, Jenn-Jia Su
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Publication number: 20090322659Abstract: A liquid crystal display panel including a first substrate, a liquid crystal layer, an alignment layer, a polymer layer, scan lines, data lines, pixel structures, first capacitor bottom electrodes and second capacitor bottom electrodes, and a manufacturing method thereof are provided. Each pixel structure has a first pixel electrode and a second pixel electrode. Each first capacitor bottom electrode is disposed between the first pixel electrode and the first substrate. Each second capacitor bottom electrode disposed between the second pixel electrode and the first substrate includes a first pattern and a plurality of second patterns. The first pattern extends from a first side to an opposite second side of the second pixel electrode. The second patterns connected to the first pattern are disposed on the first side and the second side. The second pattern at least partly overlaps a region between the second pixel electrode and the data line.Type: ApplicationFiled: August 28, 2008Publication date: December 31, 2009Applicant: AU OPTRONICS CORPORATIONInventors: Te-Wei Chan, Chieh-Wei Chen, Cheng-Han Tsao, Chung-Yi Chiu
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Patent number: 7599030Abstract: A pixel structure for a multi-domain vertical alignment liquid crystal display (MVA-LCD) is disclosed. The pixel structure includes a pixel array having a plurality of adjacently arranged sub-pixels; and a first substrate and a second substrate having, respectively, first and second means for controlling tilt angles of liquid crystal molecules between the first and second substrates. The first and second means are alternately disposed to define each of the sub-pixels into a plurality of different azimuthal angle domains. Moreover, each of the sub-pixels also is further defined into at least two different polar angle domains. The azimuthal angle domains and polar angle domains of two adjacent sub-pixels have a mirror-image arrangement.Type: GrantFiled: July 5, 2006Date of Patent: October 6, 2009Assignee: AU Optronics Corp.Inventors: Yi-Pai Huang, Ting-Jui Chang, Po-Lun Chen, Cheng-Han Tsao
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Patent number: 7589813Abstract: A liquid crystal display panel includes an array substrate, an opposite substrate having an opposite electrode, a liquid crystal layer located therebetween, first alignment patterns and second alignment patterns. The array substrate includes scan lines, data lines and pixel units electrically connecting corresponding scan lines and data lines. Each pixel unit includes a first active device, a first pixel electrode electrically connecting the first active device and a second pixel electrode. The first pixel electrode and the second pixel electrode are separated to define a first displaying region and a second displaying region. The extending directions of the first alignment patterns in the first displaying region and the second alignment patterns in the second displaying region respectively intersect the extending direction of the scan lines at a smaller first acute angle and a greater acute angle for controlling the arrangements of the liquid crystal molecules.Type: GrantFiled: November 19, 2007Date of Patent: September 15, 2009Assignee: Au Optronics CorporationInventors: Chieh-Wei Chen, Cheng-Han Tsao, Te-Wei Chan, Jenn-Jia Su
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Publication number: 20090103033Abstract: A pixel structure including a first active device, a second active device, a first pixel electrode electrically connecting the first active device, a second pixel electrode electrically connecting the second active device and a first capacitance lower electrode is provided. Both the first active device and the second active device electrically connect a scan line and a data line. The first pixel electrode has a first interlacing pattern and first stripe patterns connected thereto. The second pixel electrode has a second interlacing pattern and second stripe patterns connected thereto. The first capacitance lower electrode located under the first interlacing pattern has a first region and second regions. The first pixel electrode substantially shields the first region but does not shield the second regions. An area ratio of the first region to the second regions is about 10:1˜300:1.Type: ApplicationFiled: March 3, 2008Publication date: April 23, 2009Applicant: Au Optronics CorporationInventors: Chieh-Wei Chen, Cheng-Han Tsao, Jenn-Jia Su
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Patent number: 7518687Abstract: A pixel structure electrically connected to a scan line and a data line, includes an active device, a first pixel electrode, a second pixel electrode, a capacitor coupling electrode and a charge releasing device. The active device is electrically connected to the scan line and the data line. The second pixel electrode is electrically isolated from the first pixel electrode. The capacitor coupling electrode is disposed under the second pixel electrode and electrically connected to the data line through the active device. The charge releasing device is electrically connected to the second pixel electrode. The above-described pixel structure is able to effectively solve the image sticking problem. In addition, further provides an active matrix substrate which is able to avoid the image sticking effect.Type: GrantFiled: September 22, 2005Date of Patent: April 14, 2009Assignee: Au Optronics CorporationInventors: Yi-Jen Chen, Cheng-Han Tsao, Wei-Kai Huang, Ming-Chou Wu, Chen-Shun Tsai, Chiung-Pin Wang, Yi-Pai Huang
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Publication number: 20090086142Abstract: A liquid crystal display panel includes an array substrate, an opposite substrate having an opposite electrode, a liquid crystal layer located therebetween, first alignment patterns and second alignment patterns. The array substrate includes scan lines, data lines and pixel units electrically connecting corresponding scan lines and data lines. Each pixel unit includes a first active device, a first pixel electrode electrically connecting the first active device and a second pixel electrode. The first pixel electrode and the second pixel electrode are separated to define a first displaying region and a second displaying region. The extending directions of the first alignment patterns in the first displaying region and the second alignment patterns in the second displaying region respectively intersect the extending direction of the scan lines at a smaller first acute angle and a greater acute angle for controlling the arrangements of the liquid crystal molecules.Type: ApplicationFiled: November 19, 2007Publication date: April 2, 2009Applicant: AU OPTRONICS CORPORATIONInventors: Chieh-Wei Chen, Cheng-Han Tsao, Te-Wei Chan, Jenn-Jia Su
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Publication number: 20080211983Abstract: A pixel control device and a display apparatus utilizing said pixel control device are provided. The pixel control device is electrically connected to a sub-pixel area to provide a first voltage level, a second voltage level, and a third voltage level to the sub-pixel area, so that liquid crystals can be disposed in various angles. A scan line of the pixel control device controls a first transistor, a second transistor, and a third transistor to be switched on. The first and second data lines thereof provide a first and a second data-referenced voltage levels, respectively, to determine the first, the second, and the third voltage levels.Type: ApplicationFiled: August 15, 2007Publication date: September 4, 2008Applicant: AU OPTRONICS CORP.Inventors: Cheng-Han Tsao, Yi-Pai Huang, Ting-Jui Chang, Hou Lung Hou
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Publication number: 20080211798Abstract: A pixel control device and a display apparatus using said pixel control device are provided. The pixel control apparatus is electrically connected to a sub-pixel area to provide a first voltage level and a second voltage level to the sub-pixel area. A scan line of the pixel control device transmits a periodic signal to alternately switch on the P type transistor and the N type transistor. A data line transmits the first voltage level to the P type transistor when the P type transistor is switched on and transmits the second voltage level to the N type transistor when the N type transistor is switched on. By providing two different voltage levels, the liquid crystals have different angles in eight domains.Type: ApplicationFiled: August 9, 2007Publication date: September 4, 2008Inventors: Cheng-Han Tsao, Yi-Pai Huang
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Publication number: 20080143900Abstract: A thin film transistor (TFT) array substrate including a substrate, scan lines and data lines both disposed on the substrate, and pixel structures is provided. A plurality of pixel areas is defined by the scan lines and the data lines on the substrate. Each scan line has a driving signal input terminal and an end terminal. Each pixel area includes a first sub-pixel area and a second sub-pixel area. The pixel structures are respectively disposed in the pixel areas and driven by the scan lines and the data lines. Each pixel structure in the respective pixel area includes a first TFT corresponding to the first sub-pixel area and a second TFT corresponding to the second sub-pixel area. Besides, ratios of a channel width to a channel length of the second TFTs connected to the same scan line increase gradually from the driving signal input terminal to the end terminal.Type: ApplicationFiled: April 24, 2007Publication date: June 19, 2008Applicant: AU OPTRONICS CORPORATIONInventors: Cheng-Han Tsao, Yi-Pai Huang, Ting-Jui Chang
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Patent number: 7379127Abstract: An electrostatic discharge (ESD) protection circuit and an ESD protection method applied in a liquid crystal display are provided. The ESD protection circuit comprises a first thin film transistor (TFT), a second TFT, a first diode and a second diode. The liquid crystal display has a signal line and a common electrode. The ESD protection method comprises the following steps. When a first electrostatic charge is generated on the signal line, the corresponding voltage of the first electrostatic charge enables the first diode to be conducted, so that the first electrostatic charge is discharged to the common electrode through the first TFT. When the second electrostatic charge is generate on common electrode, the corresponding voltage of the second electrostatic charge enables the second diode to be conducted, so that the second electrostatic charge is discharged to the signal line through the second TFT.Type: GrantFiled: July 8, 2005Date of Patent: May 27, 2008Assignee: AU Optronics CorporationInventor: Cheng-Han Tsao
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Patent number: 7359025Abstract: An array substrate capable for a liquid crystal display (LCD). A pixel electrode is disposed in a pixel region of a substrate, which comprises at least one slit. A storage capacitor is disposed between the substrate and the pixel electrode, which comprises a bottom electrode, a capacitor dielectric layer, and a top electrode. The bottom electrode is disposed in the pixel region, creating an overlap region with the slit. The capacitor dielectric layer and the top electrode are successively disposed on the bottom electrode, in which the top electrode comprises at least one recess region to partially expose the overlap region.Type: GrantFiled: July 7, 2005Date of Patent: April 15, 2008Assignee: AU Optronics Corp.Inventors: Ming-Chou Wu, Jenn-Jia Su, Cheng-Han Tsao, Po-Lun Chen