Patents by Inventor Yaw-Guang Chang

Yaw-Guang 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).

  • Publication number: 20150268745
    Abstract: A touch display module, a driving method thereof and a source driver are provided. The touch display module includes a touch display panel and at least one source driver. The source driver is coupled to a plurality of data lines of the touch display panel. In a display mode, the source driver respectively outputs a plurality of pixel driving signals to the data lines for driving the touch display panel to display a corresponding image. In a touch mode, the source driver clusters the data lines into multiple groups, and respectively outputs a plurality of touch driving signals to the groups. The data lines belonging to a same group are provided with a same touch driving signal in the touch mode.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 24, 2015
    Applicant: HIMAX TECHNOLOGIES LIMITED
    Inventors: Zhu-Rong Li, Yaw-Guang Chang
  • Publication number: 20150199044
    Abstract: Disclosed herein are touch screens that integrate touch sensing systems with display devices. The touch sensing system serves data lines and common electrodes of a driving circuitry of the display device as touch driving lines and touch sensing lines for touch sensing operations. A common electrode layer having the common electrodes of the driving circuitry includes a plurality of openings for reducing a base mutual-capacitance of the touch sensing system.
    Type: Application
    Filed: April 7, 2014
    Publication date: July 16, 2015
    Applicant: HIMAX TECHNOLOGIES LIMITED
    Inventors: Jia-Ming He, Yaw-Guang Chang, Chia-Wei Hu
  • Publication number: 20150199035
    Abstract: A stylus without active components includes a housing, and a resonant circuit, such as an LC resonant circuit, disposed in the housing. The resonant circuit is operatively configured to one of a plurality of resonant frequencies respectively associated with a plurality of function modes.
    Type: Application
    Filed: March 5, 2014
    Publication date: July 16, 2015
    Applicant: HIMAX TECHNOLOGIES LIMITED
    Inventors: YAW-GUANG CHANG, Guan-Ying Huang
  • Patent number: 9013434
    Abstract: A touch display panel, including first electrode patterns, second electrode patterns, active elements, third electrode patterns and fourth electrode patterns is provided. The second electrode patterns and the first electrode pattern are set to form pixel areas. Each of the active elements is disposed in one of the pixel areas and electrically connected to the corresponding first electrode pattern and second electrode pattern. The third electrode patterns are arranged along a direction of an arrangement direction of the second electrode patterns and divide the second electrode patterns into groups, wherein each third pattern covers columns of the pixel areas. The fourth electrode patterns are electrically insulated to the third electrode patterns. Each fourth electrode pattern is disposed in one of the pixel areas and electrically connected to the corresponding active element. A driving method of a touch display panel is also provided.
    Type: Grant
    Filed: November 5, 2013
    Date of Patent: April 21, 2015
    Assignee: Himax Technologies Limited
    Inventors: Chia-Wei Hu, Yaw-Guang Chang, Shen-Feng Tai, Wai-Pan Wu
  • Patent number: 9007341
    Abstract: In a touch system, a transmitter (TX) driving unit generates at least one pair of orthogonal drive signals, each pair having a specific frequency. At least one pair of TX electrode lines is simultaneously driven by the at least one pair of orthogonal drive signals, respectively. A sense signal is induced on a receiver (RX) electrode line by capacitances disposed between the TX electrode lines and the RX electrode line. An RX detection unit detects the sense signal to simultaneously result in two sense components that respectively estimate the capacitances associated with the TX electrode lines of the pair.
    Type: Grant
    Filed: June 25, 2013
    Date of Patent: April 14, 2015
    Assignee: Himax Technologies Limited
    Inventors: Chang-Hui Lin, Yaw-Guang Chang
  • Publication number: 20150029413
    Abstract: A touch display apparatus is provided. Data lines are used to transmit display data signals or touch scan signals during different periods, wherein the data lines, the scan lines of the touch display apparatus and touch sensing lines of the touch display apparatus are disposed on a same substrate.
    Type: Application
    Filed: February 25, 2014
    Publication date: January 29, 2015
    Applicant: HIMAX TECHNOLOGIES LIMITED
    Inventors: Yaw-Guang Chang, Chao-Wen Wu
  • Patent number: 8933748
    Abstract: An active pen IC includes a plurality of pads coupled to receive a plurality of receive (RX) signals induced from a mobile device, the received RX signals constituting an original group of RX signals. The active pen IC also includes a permuting unit configured to permute the pads such that the received RX signals corresponding to the permuted pads constitute a generated group of RX signals.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: January 13, 2015
    Assignee: Himax Technologies Limited
    Inventors: Guan-Ying Huang, Yaw-Guang Chang
  • Publication number: 20150008979
    Abstract: An active pen IC includes a plurality of pads coupled to receive a plurality of receive (RX) signals induced from a mobile device, the received RX signals constituting an original group of RX signals. The active pen IC also includes a permuting unit configured to permute the pads such that the received RX signals corresponding to the permuted pads constitute a generated group of RX signals.
    Type: Application
    Filed: July 5, 2013
    Publication date: January 8, 2015
    Inventors: Guan-Ying Huang, YAW-GUANG CHANG
  • Publication number: 20140375591
    Abstract: In apparatus of driving a touch screen, a transmitter (TX) driving unit generates TX driving signals coupled to a TX electrode substrate, and receiver (RX) detection signals are then induced on an RX electrode substrate that is coupled to and detected by an RX detection unit. A plurality of the TX driving signals are simultaneously generated and fed to the TX electrode substrate, and the TX driving signals during a given period have different phases, respectively.
    Type: Application
    Filed: June 19, 2013
    Publication date: December 25, 2014
    Inventors: Yaw-Guang Chang, Wei-Song Wang, Chang-Hui Lin
  • Publication number: 20140375595
    Abstract: In a touch system, a transmitter (TX) driving unit generates at least one pair of orthogonal drive signals, each pair having a specific frequency. At least one pair of TX electrode lines is simultaneously driven by the at least one pair of orthogonal drive signals, respectively. A sense signal is induced on a receiver (RX) electrode line by capacitances disposed between the TX electrode lines and the RX electrode line. An RX detection unit detects the sense signal to simultaneously result in two sense components that respectively estimate the capacitances associated with the TX electrode lines of the pair.
    Type: Application
    Filed: June 25, 2013
    Publication date: December 25, 2014
    Inventors: Chang-Hui Lin, Yaw-Guang Chang
  • Publication number: 20140368446
    Abstract: An apparatus of driving an in-cell touch screen, a transmitter (TX) driving unit generates TX driving signals coupled to a common-voltage electrode substrate, and RX detection signals are then induced on an RX electrode substrate that is coupled to and detected by an RX detection unit. The voltage swing of the TX driving signal is determined according to current leakage in thin film transistor (TFT) unit cells of a liquid crystal module (LCM).
    Type: Application
    Filed: June 17, 2013
    Publication date: December 18, 2014
    Inventors: YAW-GUANG CHANG, Wei-Song Wang
  • Publication number: 20140368449
    Abstract: A touch display panel, including first electrode patterns, second electrode patterns, active elements, third electrode patterns and fourth electrode patterns is provided. The second electrode patterns and the first electrode pattern are set to form pixel areas. Each of the active elements is disposed in one of the pixel areas and electrically connected to the corresponding first electrode pattern and second electrode pattern. The third electrode patterns are arranged along a direction of an arrangement direction of the second electrode patterns and divide the second electrode patterns into groups, wherein each third pattern covers columns of the pixel areas. The fourth electrode patterns are electrically insulated to the third electrode patterns. Each fourth electrode pattern is disposed in one of the pixel areas and electrically connected to the corresponding active element. A driving method of a touch display panel is also provided.
    Type: Application
    Filed: November 5, 2013
    Publication date: December 18, 2014
    Applicant: HIMAX TECHNOLOGIES LIMITED
    Inventors: Chia-Wei Hu, Yaw-Guang Chang, Shen-Feng Tai, Wai-Pan Wu
  • Patent number: 8890834
    Abstract: A scanning method of a touch panel is provided. The touch panel has a horizontal channel group including a plurality of horizontal channels and a vertical channel group including a plurality of vertical channels. According to the scanning method, N channels may be scanned simultaneously, wherein the N channels are selected from the horizontal channel group or the vertical channel group, the N channels are not adjacent to each other, N is a positive integer, and N is less than a channel amount of the selected channel group. Thereby, the scanning speed and the sensing accuracy of the touch panel using the scanning method are enhanced.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: November 18, 2014
    Assignee: Himax Technologies Limited
    Inventors: Yi-Long Yang, Yaw-Guang Chang
  • Publication number: 20140333546
    Abstract: A touch display device including an active matrix, a driving module, a sensing module and a control unit is provided. The active matrix includes a plurality of common electrodes, scan lines, and data lines. At least parts of the common electrodes form a first touch electrode set and at least parts of the data lines form a second touch electrode set. The control unit is configured to cause the driving module to drive the scan lines, the data lines, and the common electrodes in at least one display driving period to perform a displaying function, and to cause the driving module to drive one of the first touch electrode set and the second touch electrode set and cause the sensing module to receive signals from the other in at least one touch sensing period so as to perform a touch sensing function. A touch display method is also provided.
    Type: Application
    Filed: September 6, 2013
    Publication date: November 13, 2014
    Applicant: HIMAX TECHNOLOGIES LIMITED
    Inventors: Yaw-Guang Chang, Wei-Song Wang
  • Publication number: 20140306920
    Abstract: A touch screen structure for receiving and processing touch signal is disclosed, in which the touch screen structure includes a substrate, a plurality of conductive patterns, a plurality of first routing traces, and a plurality of second routing traces. The conductive patterns are disposed on the substrate, in which each of the conductive patterns has a first side and a second side disposed opposite to the first side. The first routing traces are disposed on the substrate, in which the first routing traces are electrically connected to the first sides of the conductive patterns. The second routing traces are disposed on the substrate, in which the second routing traces are electrically connected to the second sides of the conductive patterns.
    Type: Application
    Filed: April 10, 2013
    Publication date: October 16, 2014
    Applicant: Himax Technologies Limited
    Inventors: Jui-Ni LEE, Sheng-Fan YANG, Yaw-Guang CHANG, Shen-Feng TAI, Cheng-Feng HSIEH
  • Publication number: 20130278509
    Abstract: An input system includes a touch panel, a control circuit, a stylus pen, and a connection link. The control circuit generates an electrical signal. The stylus pen is external to the control circuit. The connection link is coupled between the control circuit and the stylus pen, and transmits the electrical signal to the stylus pen, wherein the electrical signal is coupled to the touch panel via the stylus pen. The connection link may be a wired link or a wireless link.
    Type: Application
    Filed: April 23, 2012
    Publication date: October 24, 2013
    Inventor: Yaw-Guang Chang
  • Patent number: 8564374
    Abstract: An oscillator calibration apparatus includes a counter, a comparator and an adjusting unit. The counter is utilized for receiving a first clock signal and a second clock signal, and utilizing the first clock signal to sample the second clock signal to generate at least one counting value, where the first clock signal is generated from a first oscillator, and the second clock signal is generated from a second oscillator different from the first oscillator; the comparator is coupled to the counter, and is utilized for comparing the counting value with a predetermined value to generate at least one calibration signal; and the adjusting unit is coupled to the comparator, and is utilized for adjusting a frequency of the second oscillator according to the calibration signal.
    Type: Grant
    Filed: October 3, 2011
    Date of Patent: October 22, 2013
    Assignee: Himax Technologies Limited
    Inventors: Chun-Yu Chiu, Yaw-Guang Chang, Meng-Wei Shen
  • Publication number: 20130265247
    Abstract: A touch panel including a substrate and a sensing array is provided. The sensing array is disposed on the substrate and includes a plurality of sensing units. Each sensing unit has a first sensing electrode and a second sensing electrode which are arranged in a staggered manner and are electrically insulated from each other. The first sensing electrode includes two parallel first sensing pads and a first connection portion. The second sensing electrode includes two parallel second sensing pads and a second connection portion. The first sensing pads, the first connection portion, the second sensing pads, and the second connection portion are in rectangular shapes, and short sides of the first connection portion and the second connection portion are electrically connected to middle portions of long sides of the first sensing pads and the second sensing pads respectively. The second connection portion and the first connection portion intersect each other.
    Type: Application
    Filed: January 18, 2013
    Publication date: October 10, 2013
    Applicant: HIMAX TECHNOLOGIES LIMITED
    Inventors: Sheng-Fan Yang, Jui-Ni Lee, Yaw-Guang Chang, Shen-Feng Tai
  • Publication number: 20130234979
    Abstract: A touch cell applied to a capacitive touch panel includes a first electrode and a second electrode, where the first electrode is connected to a scan signal transmitting circuit of the capacitive touch panel, and is utilized for receiving a scan signal, and the second electrode is connected to a detecting circuit of the capacitive touch panel. In addition, the second electrode is not connected to the first electrode, the second electrode has a fish-bone pattern, and a width of a tail of branches of the fish-bone pattern is greater than a width of a head of the branches of the fish-bone pattern.
    Type: Application
    Filed: November 22, 2012
    Publication date: September 12, 2013
    Applicant: HIMAX TECHNOLOGIES LIMITED
    Inventors: Jui-Ni Lee, Sheng-Fan Yang, Yaw-Guang Chang, Shen-Feng Tai, Cheng-Feng Hsieh
  • Patent number: 8525818
    Abstract: A display system includes a display device, a driving circuit, a flexible printed circuit (FPC), a charge pump circuit and a control circuit. The driving circuit is disposed on the display device, and utilized for driving the display device. The FPC is externally coupled to the display device. The charge pump circuit is disposed on the FPC, and utilized for generating at least an output voltage to the driving circuit. The control circuit is disposed on the display device and coupled to the driving circuit, and utilized for generating a control signal to control the charge pump circuit. The charge pump circuit has a control pin coupled to the control circuit for receiving the control signal generated from the control circuit.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: September 3, 2013
    Assignee: Himax Technologies Limited
    Inventors: Ssu-Chieh Yang, Yaw-Guang Chang, Hsien-Ting Huang