Patents by Inventor Yueh-Ping Chang

Yueh-Ping Chang 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).

  • Patent number: 9507219
    Abstract: A vertical alignment liquid crystal display device (VA-LCD) includes a display panel. The display panel includes a plurality of pixels. Each pixel unit includes a first thin film transistor (TFT), a second TFT, and a liquid crystal capacitor having a pixel electrode and a common electrode. The common electrode is applied with a common voltage, a first gray voltage is applied to the pixel electrode through a first TFT, and a second gray voltage is applied to the pixel electrode through a second TFT different from the first gray voltage, such that liquid crystal capacitor maintains two different gray voltages in a display frame time of the VA-LCD.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: November 29, 2016
    Assignee: INNOLUX CORPORATION
    Inventors: Yueh-Ping Chang, Chao-Yi Hung
  • Publication number: 20160062195
    Abstract: A vertical alignment liquid crystal display device (VA-LCD) includes a display panel. The display panel includes a plurality of pixels. Each pixel unit includes a first thin film transistor (TFT), a second TFT, and a liquid crystal capacitor having a pixel electrode and a common electrode. The common electrode is applied with a common voltage, a first gray voltage is applied to the pixel electrode through a first TFT, and a second gray voltage is applied to the pixel electrode through a second TFT different from the first gray voltage, such that liquid crystal capacitor maintains two different gray voltages in a display frame time of the VA-LCD.
    Type: Application
    Filed: November 12, 2015
    Publication date: March 3, 2016
    Inventors: Yueh-Ping CHANG, Chao-Yi HUNG
  • Patent number: 9217898
    Abstract: A vertical alignment liquid crystal display device (VA-LCD) includes a display panel. The display panel includes a plurality of pixels. Each pixel unit includes a first thin film transistor (TFT), a second TFT, and a liquid crystal capacitor having a pixel electrode and a common electrode. The common electrode is applied with a common voltage, a first gray voltage is applied to the pixel electrode through a first TFT, and a second gray voltage is applied to the pixel electrode through a second TFT different from the first gray voltage, such that liquid crystal capacitor maintains two different gray voltages in a display frame time of the VA-LCD.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: December 22, 2015
    Assignee: INNOLUX CORPORATION
    Inventors: Yueh-Ping Chang, Chao-Yi Hung
  • Patent number: 9201274
    Abstract: A vertical alignment liquid crystal display device (VA-LCD) includes a display panel. The display panel includes a plurality of pixels. Each pixel unit includes a first thin film transistor (TFT), a second TFT, and a liquid crystal capacitor having a pixel electrode and a common electrode. The common electrode is applied with a common voltage, a first gray voltage is applied to the pixel electrode through a first TFT, and a second gray voltage is applied to the pixel electrode through a second TFT different from the first gray voltage, such that liquid crystal capacitor maintains two different gray voltages in a display frame time of the VA-LCD.
    Type: Grant
    Filed: May 23, 2014
    Date of Patent: December 1, 2015
    Assignee: INNOLUX CORPORATION
    Inventors: Yueh-Ping Chang, Chao-Yi Hung
  • Publication number: 20140253837
    Abstract: A vertical alignment liquid crystal display device (VA-LCD) includes a display panel. The display panel includes a plurality of pixels. Each pixel unit includes a first thin film transistor (TFT), a second TFT, and a liquid crystal capacitor having a pixel electrode and a common electrode. The common electrode is applied with a common voltage, a first gray voltage is applied to the pixel electrode through a first TFT, and a second gray voltage is applied to the pixel electrode through a second TFT different from the first gray voltage, such that liquid crystal capacitor maintains two different gray voltages in a display frame time of the VA-LCD.
    Type: Application
    Filed: May 23, 2014
    Publication date: September 11, 2014
    Applicant: InnoLux Corporation
    Inventors: Yueh-Ping CHANG, Chao-Yi HUNG
  • Publication number: 20140168561
    Abstract: A vertical alignment liquid crystal display device (VA-LCD) includes a display panel. The display panel includes a plurality of pixels. Each pixel unit includes a first thin film transistor (TFT), a second TFT, and a liquid crystal capacitor having a pixel electrode and a common electrode. The common electrode is applied with a common voltage, a first gray voltage is applied to the pixel electrode through a first TFT, and a second gray voltage is applied to the pixel electrode through a second TFT different from the first gray voltage, such that liquid crystal capacitor maintains two different gray voltages in a display frame time of the VA-LCD.
    Type: Application
    Filed: February 20, 2014
    Publication date: June 19, 2014
    Applicant: InnoLux Corporation
    Inventors: Yueh-Ping CHANG, Chao-Yi HUNG
  • Patent number: 8692752
    Abstract: A vertical alignment liquid crystal display device (VA-LCD) includes a display panel. The display panel includes a plurality of pixels. Each pixel unit includes a first thin film transistor (TFT), a second TFT, and a liquid crystal capacitor having a pixel electrode and a common electrode. The common electrode is applied with a common voltage, a first gray voltage is applied to the pixel electrode through a first TFT, and a second gray voltage is applied to the pixel electrode through a second TFT different from the first gray voltage, such that the liquid crystal capacitor maintains two different gray voltages in a display frame time of the VA-LCD.
    Type: Grant
    Filed: May 18, 2009
    Date of Patent: April 8, 2014
    Assignee: Chimei Innolux Corporation
    Inventors: Yueh-Ping Chang, Chao-Yi Hung
  • Patent number: 7929068
    Abstract: A pixel structure including a substrate, a scan line, a data line, a first and a second switching device, a first and a second pixel electrode, a first and a second bended pixel electrode, a first and a second connecting conductive layer, and a first and a second common line is provided. The scan line and data line demarcate a first and a second areas on the substrate, and the scan line is located between the two areas. The first and second switching devices are electrically connected to the scan line and the data line and are also electrically connected to the first and second pixel electrodes on the first and second areas respectively. The first and second bended pixel electrodes on the second and first areas are electrically connected to the first and second pixel electrodes through the first and second connecting conductive layers on the scan line respectively.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: April 19, 2011
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Yueh-Ping Chang, Chih-Chung Liu, Ming-Tsung Wang, Ming-Hsuan Chang
  • Patent number: 7916235
    Abstract: A pixel structure suitable for being disposed on a substrate includes a thin film transistor (TFT), a first pixel electrode, a second pixel electrode, a scan line and a data line. The TFT disposed on the substrate includes a gate, a source, a first drain and a second drain. A main TFT is formed by the gate, the source and the first drain. A sub-thin film transistor (sub-TFT) is formed by the gate, the first drain and the second drain. The first pixel electrode is electrically connected to the first drain, and a portion of the first drain extends between the second pixel electrode and the substrate to form capacitor-coupling electrode. The second pixel electrode is electrically connected to the second drain of the sub-TFT. The scan line is disposed on the substrate and electrically connected to the gate, and the data line is electrically connected to the source.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: March 29, 2011
    Assignee: Chunghwa Picture Tubes, Ltd
    Inventors: Ming-Tsung Wang, Chih-Chung Liu, Yueh-Ping Chang, Meng-Chieh Tai
  • Publication number: 20110058136
    Abstract: A liquid crystal display structure includes a top substrate, a bottom substrate, a gate metal layer, a pixel region, a main spacer, an auxiliary spacer and liquid crystal molecules. The gate metal layer and the pixel region are located between the top substrate and the bottom substrate, and are disposed on the bottom substrate. The bottom substrate overlaps with the gate metal layer. The pixel regions are adjacent to the gate layer metal but are separated from the gate metal layer. The main spacer and the auxiliary spacer are disposed on the top substrate. The main spacer extends downward to the gate metal layer, and the auxiliary spacer is located on the outside of the region which encompasses the gate metal layer, and does not overlap with the gate metal layer. The liquid crystal molecules are filled into the gap between the top substrate and the bottom substrate.
    Type: Application
    Filed: August 4, 2010
    Publication date: March 10, 2011
    Applicant: CHIMEI INNOLUX CORPORATION
    Inventors: YUEH-PING CHANG, CHAO-YI HUNG
  • Patent number: 7868962
    Abstract: A pixel circuit for a liquid crystal display panel includes a capacitor unit, a voltage-regulating mechanism, a first switching member, and a second switching member. The liquid crystal display panel includes a plurality of scan lines and data lines. The voltage-regulating mechanism is coupled to the first and second liquid crystal capacitors thereby enabling the first and second liquid crystal capacitors to be configured with different voltages when a voltage is applied to the capacitor unit. The first switching member is coupled to the capacitor unit, one of two corresponding scan lines, and one of two corresponding data lines. The second switching member is coupled to the second liquid crystal capacitor, the other of two corresponding scan lines.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: January 11, 2011
    Assignee: Chimel Innolux Corporation
    Inventors: Yueh-Ping Chang, Chao-Yi Hung, Chih-Chung Liu
  • Patent number: 7830486
    Abstract: A pixel structure suitable for being disposed on a substrate is provided. The pixel structure includes a scan line, a data line, a thin film transistor (TFT), a primary pixel electrode, and at least one secondary pixel electrode. The scan line and the data line are disposed on the substrate. The TFT is disposed on the substrate and is electrically connected to the scan line and the data line. The primary pixel electrode is electrically connected to a drain electrode of the TFT through a contact hole. The secondary pixel electrode is disposed above the drain electrode and the drain electrode is electrically coupled to the secondary pixel electrode. Besides, a liquid crystal display (LCD) panel having the pixel structure is also provided.
    Type: Grant
    Filed: September 29, 2007
    Date of Patent: November 9, 2010
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chih-Chung Liu, Ming-Tsung Wang, Yueh-Ping Chang
  • Publication number: 20100237350
    Abstract: A pixel structure suitable for being disposed on a substrate includes a thin film transistor (TFT), a first pixel electrode, a second pixel electrode, a scan line and a data line. The TFT disposed on the substrate includes a gate, a source, a first drain and a second drain. A main TFT is formed by the gate, the source and the first drain. A sub-thin film transistor (sub-TFT) is formed by the gate, the first drain and the second drain. The first pixel electrode is electrically connected to the first drain, and a portion of the first drain extends between the second pixel electrode and the substrate to form capacitor-coupling electrode. The second pixel electrode is electrically connected to the second drain of the sub-TFT. The scan line is disposed on the substrate and electrically connected to the gate, and the data line is electrically connected to the source.
    Type: Application
    Filed: June 4, 2010
    Publication date: September 23, 2010
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventors: Ming-Tsung Wang, Chih-Chung Liu, Yueh-Ping Chang, Meng-Chieh Tai
  • Patent number: 7755710
    Abstract: A pixel structure includes a gate, a source, a first drain, a second drain, a third drain, a first pixel electrode, a second pixel electrode, a scan line and a data line. The gate, the source and the first drain form a first thin film transistor. The gate, the source and the second drain form a second thin film transistor. The gate, the second drain and the third drain form a sub-thin film transistor (sub-TFT). Additionally, the first pixel electrode is electrically connected to the first drain, and the second drain extends to a portion between the second pixel electrode and the substrate such that a capacitor-coupling electrode is formed. Moreover, the second pixel electrode is electrically connected to the third drain of the sub-TFT. The scan line is disposed on the substrate and electrically connected to the gate, and the data line is electrically connected to the source.
    Type: Grant
    Filed: August 19, 2007
    Date of Patent: July 13, 2010
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Ming-Tsung Wang, Chih-Chung Liu, Yueh-Ping Chang, Meng-Chieh Tai
  • Patent number: 7705927
    Abstract: A pixel structure including a scan line, a data line, a first sub-pixel, a coupling electrode and a second sub-pixel is provided. The first sub-pixel includes a first thin film transistor (TFT) and a first pixel electrode, and the first pixel electrode is electrically connected to the scan line and the data line via the first TFT. The coupling electrode is disposed above the data line and electrically insulated from the data line. The second sub-pixel includes a second thin film transistor and a second pixel electrode. The second pixel electrode is electrically connected to the second TFT, and the second TFT is electrically connected to the coupling electrode. When seeing an image from a slant direction, color shift of image can be solved by utilizing the pixel structure. Besides, a liquid crystal display panel having the described pixel structure is also provided.
    Type: Grant
    Filed: December 28, 2007
    Date of Patent: April 27, 2010
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Ming-Hsuan Chang, Chih-Chung Liu, Yueh-Ping Chang
  • Publication number: 20090284674
    Abstract: A vertical alignment liquid crystal display device (VA-LCD) includes a display panel. The display panel includes a plurality of pixels. Each pixel unit includes a liquid crystal capacitor. The liquid crystal capacitor maintains two different gray voltages in a display frame time of the VA-LCD.
    Type: Application
    Filed: May 18, 2009
    Publication date: November 19, 2009
    Inventors: Yueh-Ping Chang, Chao-Yi Hung
  • Publication number: 20090268113
    Abstract: A pixel circuit for a liquid crystal display panel includes a capacitor unit, a voltage-regulating mechanism, a first switching member, and a second switching member. The liquid crystal display panel includes a plurality of scan lines and data lines. The voltage-regulating mechanism is coupled to the first and second liquid crystal capacitors thereby enabling the first and second liquid crystal capacitors to be configured with different voltages when a voltage is applied to the capacitor unit. The first switching member is coupled to the capacitor unit, one of two corresponding scan lines, and one of two corresponding data lines. The second switching member is coupled to the second liquid crystal capacitor, the other of two corresponding scan lines.
    Type: Application
    Filed: April 27, 2009
    Publication date: October 29, 2009
    Inventors: Yueh-Ping Chang, Chao-Yi Hung, Chih-Chung Liu
  • Patent number: 7508463
    Abstract: A pixel structure suitable for being controlled by a scan line and a data line disposed on a thin film transistor (TFT) array substrate of a multi-domain vertical alignment (MVA) liquid crystal display is disclosed. The pixel structure includes a first TFT, a second TFT, a first pixel electrode, a second pixel electrode and a plurality of alignment members, wherein the first TFT and the second TFT are both electrically connected to the scan line and the data line. The first TFT has a first drain and the first pixel electrode is electrically connected to the first drain. The second TFT has a second drain and the second pixel electrode is floated over the second drain to form a coupling capacitor, while a voltage difference is established between the second pixel electrode and the first pixel electrode. The alignment members are disposed on the first and the second pixel electrode.
    Type: Grant
    Filed: December 12, 2006
    Date of Patent: March 24, 2009
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Meng-Chieh Tai, Chih-Chung Liu, Yueh-Ping Chang
  • Publication number: 20080303966
    Abstract: A pixel structure including a substrate, a scan line, a data line, a first and a second switching device, a first and a second pixel electrode, a first and a second bended pixel electrode, a first and a second connecting conductive layer, and a first and a second common line is provided. The scan line and data line demarcate a first and a second areas on the substrate, and the scan line is located between the two areas. The first and second switching devices are electrically connected to the scan line and the data line and are also electrically connected to the first and second pixel electrodes on the first and second areas respectively. The first and second bended pixel electrodes on the second and first areas are electrically connected to the first and second pixel electrodes through the first and second connecting conductive layers on the scan line respectively.
    Type: Application
    Filed: January 16, 2008
    Publication date: December 11, 2008
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventors: Yueh-Ping Chang, Chih-Chung Liu, Ming-Tsung Wang, Ming-Hsuan Chang
  • Publication number: 20080303970
    Abstract: A pixel structure includes a gate, a source, a first drain, a second drain, a third drain, a first pixel electrode, a second pixel electrode, a scan line and a data line. The gate, the source and the first drain form a first thin film transistor. The gate, the source and the second drain form a second thin film transistor. The gate, the second drain and the third drain form a sub-thin film transistor (sub-TFT). Additionally, the first pixel electrode is electrically connected to the first drain, and the second drain extends to a portion between the second pixel electrode and the substrate such that a capacitor-coupling electrode is formed. Moreover, the second pixel electrode is electrically connected to the third drain of the sub-TFT. The scan line is disposed on the substrate and electrically connected to the gate, and the data line is electrically connected to the source.
    Type: Application
    Filed: August 19, 2007
    Publication date: December 11, 2008
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventors: Ming-Tsung Wang, Chih-Chung Liu, Yueh-Ping Chang, Meng-Chieh Tai