Patents Assigned to Unidisplay, Inc.
  • Patent number: 8642909
    Abstract: A touch panel includes a substrate, a first and a second patterned conductive layers respectively disposed on an upper surface of the substrate and a lower surface opposite to the upper surface. The substrate has a first sensing area and a first circuit bonding area located on the upper surface. The first patterned conductive layer includes a plurality of first sensing series and a plurality of first dummy patterns respectively located in the first sensing area and the first circuit bonding area. Each of the first sensing series is electrically insulated from each other and has a first terminal extending into the first circuit bonding area. The first dummy patterns surround each first terminal and are electrically insulated from each first terminal. A plurality of first dummy patterns intervenes between any two adjacent first terminals in the first circuit bonding area.
    Type: Grant
    Filed: January 6, 2012
    Date of Patent: February 4, 2014
    Assignee: Unidisplay Inc.
    Inventors: Yau-Chen Jiang, Jeng-Maw Chiou, Ting-Chieh Chien
  • Patent number: 7495590
    Abstract: A technique for removing vertical stripe artifacts generated in a Liquid Crystal Display (LCD) panel, more particularly a technique for compensating for and removing an inter-channel offset voltage of a column driver, which causes the vertical stripe artifacts, is disclosed. An offset voltage generated in each channel for driving each pixel of the LCD panel is detected for a whole signal path and offset voltages detected for all channels are compared and extracted according to a given timing sequence by a common signal comparator, thereby preventing the offset of the detection comparator and reducing a chip size of the column driver in contrary to the prior art. Moreover, an inter-channel offset voltage is detected in a digital circuit mode, thereby compensating for process variations in a semiconductor chip manufacturing process in circuit terms.
    Type: Grant
    Filed: October 29, 2007
    Date of Patent: February 24, 2009
    Assignees: Unidisplay, Inc., SNU Industry Foundation
    Inventors: Deog-Kyoon Jeong, Won-Jun Choe
  • Publication number: 20080252504
    Abstract: A technique for removing vertical stripe artifacts generated in a Liquid Crystal Display (LCD) panel, more particularly a technique for compensating for and removing an inter-channel offset voltage of a column driver, which causes the vertical stripe artifacts, is disclosed. An offset voltage generated in each channel for driving each pixel of the LCD panel is detected for a whole signal path and offset voltages detected for all channels are compared and extracted according to a given timing sequence by a common signal comparator, thereby preventing the offset of the detection comparator and reducing a chip size of the column driver in contrary to the prior art. Moreover, an inter-channel offset voltage is detected in a digital circuit mode, thereby compensating for process variations in a semiconductor chip manufacturing process in circuit terms.
    Type: Application
    Filed: October 29, 2007
    Publication date: October 16, 2008
    Applicants: UniDisplay, Inc., SNU Industry Foundation
    Inventors: Deog-Kyoon JEONG, Weon Jun Choe