Patents by Inventor Ya-Hsiang Tai

Ya-Hsiang Tai 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: 9165960
    Abstract: A pixel circuit, an active sensing array, a sensing device, and a driving method thereof are provided. The pixel circuit includes a sensing transistor, a reset transistor, and a storage capacitor. The sensing transistor is electrically connected to a sensing element and a data line. The reset transistor is electrically connected to a first scan line and the sensing transistor. The storage capacitor is electrically connected to the sensing transistor and a second scan line. During a compensation period, the reset transistor is turned on in response to a first scanning pulse from the first scan line, so that the sensing transistor is connected into a diode configuration, and the storage capacitor charges and discharges to a threshold voltage of the sensing transistor through the sensing transistor having the diode configuration in response to switching of a level of the data line.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: October 20, 2015
    Assignee: Industrial Technology Research Institute
    Inventors: Ya-Hsiang Tai, Bo-Cheng Chen, Lu-Sheng Chou, Bo-Wen Xiao, Heng-Yin Chen
  • Publication number: 20150077010
    Abstract: Provided is the pixel circuit for active matrix display apparatus and the driving method thereof, which is controlled by digital signal. The pre-charge pixel voltage is controlled and discharged by controlling the resistor and transistors, so that the desired grey scale is generated. The pixel circuit includes: a first switch, a second switch, a third switch, an energy storage device and resistor. By controlling the third switch, the first end of the energy storage device is charged to the voltage of the second source. The first switch and the second switch are controlled to switch on, so that the first end of the energy storage device discharging to the first source. The second switch switches off when the first end of the energy storage device reaches the desired pixel voltage.
    Type: Application
    Filed: April 30, 2014
    Publication date: March 19, 2015
    Applicant: National Chiao Tung University
    Inventors: Ya-Hsiang TAI, Lu-Sheng CHOU, Chun-Yu LIN, Chia-Hung CHANG
  • Publication number: 20140192035
    Abstract: A pixel circuit, an active sensing array, a sensing device, and a driving method thereof are provided. The pixel circuit includes a sensing transistor, a reset transistor, and a storage capacitor. The sensing transistor is electrically connected to a sensing element and a data line. The reset transistor is electrically connected to a first scan line and the sensing transistor. The storage capacitor is electrically connected to the sensing transistor and a second scan line. During a compensation period, the reset transistor is turned on in response to a first scanning pulse from the first scan line, so that the sensing transistor is connected into a diode configuration, and the storage capacitor charges and discharges to a threshold voltage of the sensing transistor through the sensing transistor having the diode configuration in response to switching of a level of the data line.
    Type: Application
    Filed: June 10, 2013
    Publication date: July 10, 2014
    Inventors: Ya-Hsiang Tai, Bo-Cheng Chen, Lu-Sheng Chou, Bo-Wen Xiao, Heng-Yin Chen
  • Patent number: 8723835
    Abstract: The present application provides a touch-sensing display panel comprising a display panel and a touch-sensing device disposed above the display panel. The touch-sensing device comprises a plurality of select lines, a plurality of readout lines and a plurality of capacitive touch-sensing units arranged in array. Each of the capacitive touch-sensing units comprises a transistor and a touch-sensing pad, each of the transistors comprises a gate electrode electrically connected to one of the select lines, a source electrode electrically connected to a reference voltage, a drain electrode electrically connected to one of the readout lines, and a channel layer electrically coupled to the touch-sensing pad.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: May 13, 2014
    Assignee: Au Optronics Corporation
    Inventors: Hao-Lin Chiu, Chun-Yao Huang, Yih-Chyun Kao, Ya-Hsiang Tai, Lu-Sheng Chou, Kuan-Da Lin
  • Patent number: 8546764
    Abstract: The present invention provides an active X-ray sensing circuit and the sensing method thereof, it is applied in X-ray panel. The X-ray sensing circuit comprises two row of pixel circuit, and the two row of pixel circuit shares one scan line, and each data line connects with two switches. It is compensated the threshold voltage when it switches to the current source. It operates reading when it switches to amplifier. By applying specific scan line signal, the last-row pixel circuit is compensated and the next-row pixel row is read at the same time, so that the sensing circuit array can compensate and sense in one scan to avoid the effect of the leakage current.
    Type: Grant
    Filed: August 28, 2012
    Date of Patent: October 1, 2013
    Assignee: National Chiao Tung University
    Inventors: Ya-Hsiang Tai, Lu-Sheng Chou, Bo-Cheng Chen
  • Publication number: 20120287075
    Abstract: The invention discloses an active matrix touch sensing circuit apparatus used in a touch panel comprises a sensing unit, a resistance, and a thin film transistor. The resistance connects the sensing unit and the first scan line. The control end of the thin film transistor connects the sensing unit, the second scan line connects the input end of the thin film transistor, and the read out line connects the output end of the thin film transistor. When the sensing value of the body touch sensing unit is changed, and then the input wave form of the control end is changed. The output end generates an open current, and the read out line transmits the open current.
    Type: Application
    Filed: June 29, 2011
    Publication date: November 15, 2012
    Applicant: National Chiao Tung University
    Inventors: Ya-Hsiang Tai, Lu-Sheng Chou, Hao-Lin Chiu
  • Publication number: 20120133607
    Abstract: The present application provides a touch-sensing display panel comprising a display panel and a touch-sensing device disposed above the display panel. The touch-sensing device comprises a plurality of select lines, a plurality of readout lines and a plurality of capacitive touch-sensing units arranged in array. Each of the capacitive touch-sensing units comprises a transistor and a touch-sensing pad, each of the transistors comprises a gate electrode electrically connected to one of the select lines, a source electrode electrically connected to a reference voltage, a drain electrode electrically connected to one of the readout lines, and a channel layer electrically coupled to the touch-sensing pad.
    Type: Application
    Filed: November 30, 2010
    Publication date: May 31, 2012
    Applicant: AU OPTRONICS CORPORATION
    Inventors: Hao-Lin Chiu, Chun-Yao Huang, Yih-Chyun Kao, Ya-Hsiang Tai, Lu-Sheng Chou, Kuan-Da Lin
  • Patent number: 7746331
    Abstract: A source-follower-type analogue buffer with an active load, a new compensating operation and a display with the source-follower-type analogue buffers are developed to minimize the variation from both the charging time and the device characteristics and maximize the range of the input voltage. In the source-follower-type analogue buffer, during a compensation period, a voltage drop is stored in a proposed storage capacitor, and during a data-input period, the output voltage is compensated by the voltage stored in the storage capacitor.
    Type: Grant
    Filed: February 16, 2006
    Date of Patent: June 29, 2010
    Assignee: TPO Displays Corp.
    Inventors: Ya-Hsiang Tai, Cheng-Chiu Pai
  • Patent number: 7742044
    Abstract: A source-follower-type analogue buffer with an active load, a new compensating operation and a display with the source-follower-type analogue buffers are developed to reduce an error voltage which is the difference between an input voltage and an output voltage of the analogue buffer. The source-follower type analogue buffer can also minimize the variation from both the charging time and the device characteristics and maximize the range of the input voltage.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: June 22, 2010
    Assignee: TPO Displays Corp.
    Inventors: Cheng-Ho Yu, Fu-Yuan Hsueh, Wei-Cheng Lin, Keiichi Sano, Ya-Hsiang Tai
  • Publication number: 20100133544
    Abstract: A thin film transistor (TFT) includes a poly-silicon island, a gate insulating layer, a gate stack layer, and a dielectric layer. The poly-silicon island includes a source region and a drain region. The gate insulating layer covers the poly-silicon island. The gate stack layer is disposed on the gate insulating layer and includes a first conductive layer and a second conductive layer. A length of the first conductive layer is less than a length of the second conductive layer. The dielectric layer covers the gate insulating layer and the gate stack layer, and therefore a number of cavities are formed between the second conductive layer and the gate insulating layer.
    Type: Application
    Filed: February 6, 2009
    Publication date: June 3, 2010
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventors: Ta-Chuan Liao, Huang-Chung Cheng, Ya-Hsiang Tai, Szu-Fen Chen
  • Patent number: 7590214
    Abstract: A shift register and a shift register apparatus are provided. The shift register includes a plurality of shift register apparatus, and each shift register apparatus comprises a pre-charge circuit, a pull-up circuit and a pull-down circuit. The pre-charge circuit is used for sampling an input signal according to a first clock signal and a second clock signal respectively and generate a first charging signal and a second charging signal respectively. The pull-up circuit is coupled to the pre-charge circuit. The pull-up circuit receives the third clock signal and the first charging signal to output an output signal accordingly. The pull-down circuit is coupled to the pre-charge circuit and the pull-up circuit. The pull-down circuit receives the fourth clock signal and the second charging signal to decide whether to couple the output signal to a common potential.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: September 15, 2009
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Chin-Wei Liu, Ya-Hsiang Tai
  • Patent number: 7580015
    Abstract: A pixel circuit of an active-matrix organic light-emitting diode does not provide currents for an organic light-emitting diode during a compensation period, and provides currents, free from variation of a threshold voltage of a thin-film transistor, for the organic light-emitting diode during a data input period, so as to improve gray levels, increase contrast ratios, and decrease power consumption.
    Type: Grant
    Filed: February 24, 2006
    Date of Patent: August 25, 2009
    Assignee: TPO Displays Corp.
    Inventors: Ya-Hsiang Tai, Cheng-Chiu Pai
  • Publication number: 20090135333
    Abstract: The invention discloses an LCD with an ambient light sense function and its method. The method compraises the step of: coupling a capacitor to a source electrode of a thin film transistor; calculating a transmission time which required by a potential change from the reduction of electric charges; and finally, calculating an intensity of the ambient light according to the transmission time. The invention further discloses an ambient light sense circuit having a thin film transistor, a capacitor and a read-out switch. As the ambient light changes, a leakage current of the thin film transistor is changed accordingly, and the transmission time which required by the potential change is therefore changed. The read-out switch transmits said potential to a data read-out line in order to calculate the intensity of the ambient light from the transmission time. The LCD of this invention includes a plurality of capacitors, a plurality of read-out switches and a processing module.
    Type: Application
    Filed: March 6, 2008
    Publication date: May 28, 2009
    Applicant: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Ya-Hsiang Tai, Han-Ching Ho, Chia-Pin Cheng
  • Publication number: 20080279327
    Abstract: A shift register and a shift register apparatus are provided. The shift register includes a plurality of shift register apparatus, and each shift register apparatus comprises a pre-charge circuit, a pull-up circuit and a pull-down circuit. The pre-charge circuit is used for sampling an input signal according to a first clock signal and a second clock signal respectively and generate a first charging signal and a second charging signal respectively. The pull-up circuit is coupled to the pre-charge circuit. The pull-up circuit receives the third clock signal and the first charging signal to output an output signal accordingly. The pull-down circuit is coupled to the pre-charge circuit and the pull-up circuit. The pull-down circuit receives the fourth clock signal and the second charging signal to decide whether to couple the output signal to a common potential.
    Type: Application
    Filed: January 29, 2008
    Publication date: November 13, 2008
    Applicant: CHUNGHWA PICTURE TUBES, LTD.
    Inventors: Chin-Wei Liu, Ya-Hsiang Tai
  • Patent number: 7439966
    Abstract: A data driver and a method of driving the data driver are disclosed. A multiplexer receives data signals from a signal source. A control circuit periodically outputs a plurality of control signals to the multiplexer. When the multiplexer receives the control signals, transistors of the multiplexer are turned on for driving different loads with a data signal at different timings or for driving the same load with different signals at different timings.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: October 21, 2008
    Assignee: TPO Displays Corp.
    Inventor: Ya-Hsiang Tai
  • Publication number: 20080252622
    Abstract: Systems for displaying images. The system comprises a signal driving circuit with X+1 shift registers connected in series, generating X+1 output pulses in sequence according to a start pulse and a clock signal, and a logic unit coupled to the X+1 shift registers, generating Z driving signals in sequence according to the X+1 output pulses and Y enabling signals, wherein Y, X and Z are integers, Y>1, X>0 and Z>X.
    Type: Application
    Filed: April 16, 2007
    Publication date: October 16, 2008
    Applicant: TPO DISPLAYS CORP.
    Inventors: Ya-Hsiang Tai, Ksuan-Chun Ku
  • Patent number: 7420537
    Abstract: A liquid crystal display and a dummy-loading device thereof are provided. The dummy-loading device is suitable for a liquid crystal display having a plurality of pixel bands. The liquid crystal display comprises an input signal line to receive image data, and a plurality of horizontal switches and a plurality of shift registers connected in series. The shift registers sequentially shift and output a video control signal for conducting the input signal lines and the pixel bands. A dummy-loading device is disposed in the liquid crystal display, comprising a dummy pixel band, a dummy shift register and a dummy horizontal switch on one side of the liquid crystal display, for providing the edge band compensation to resolve unbalanced imaging.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: September 2, 2008
    Assignee: TPO Displays Corp.
    Inventors: Wei Wang, Ya-Hsiang Tai
  • Patent number: 7411430
    Abstract: An analog output buffer circuit for a flat panel display is provided for improving an output signal distortion. The circuit includes a transistor, a current source, an input capacitor, an upper switch, a lower switch, a first switch, a second switch and a third switch. In which, the transistor and the current source are electrically connected in series between a first power supply and a second power supply. The current source provides a compensatory current for the transistor when a leakage current occurs. The upper switch and the first switch are turned on during the first period, and the lower switch and the second switch are turn on during the second period, in which the second period is after the first period. Those switches eliminate the drawback of different voltage levels between the input signal and the output signal obtained from the output buffer circuit inputted by the input signal.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: August 12, 2008
    Assignee: Chunghwa Picture Tubes, Ltd.
    Inventors: Huang-Chung Cheng, Ya-Hsiang Tai, Bo-Ting Chen, Chun-Hsiang Fang
  • Patent number: 7365726
    Abstract: A driving method of an LCD panel having a plurality of display groups comprising a plurality of display cells and respectively coupled to a data electrode and a gate electrode. The display cells of the display group are coupled to the data electrode and the gate electrode connected to the display group. The video signals are provided to the data electrodes to make the number of the display groups having the number of the display cells with positive polarity greater than the number of the display cells with negative polarity equal to the number of the display groups having the number of the display cells with negative polarity greater than the number of the display cells with positive polarity. The display groups are coupled to the same gate electrode. Then, the scan signals are provided to the gate electrodes.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: April 29, 2008
    Inventors: Ya-Hsiang Tai, Chaug-Ming Chiu
  • Patent number: 7248326
    Abstract: A liquid crystal display (LCD) and fabricating method thereof. The LCD includes a first substrate, provided with a plurality of parallel gate lines and a plurality of parallel signal lines, wherein the gate lines and signal lines are perpendicular, and a pixel area is defined by two adjacent gate lines and two adjacent signal lines. A source electrode, electrically connected to one of the adjacent signal lines, and a drain electrode are formed on the pixel area. A first pixel electrode is formed, electrically connected to the drain electrode, on the pixel area. A second substrate is provided a predetermined distance above the first substrate, having a plurality of color-filtering areas, directly above the respective pixel area. A second pixel electrode layer is formed on the second substrate, wherein the part thereof directly above the signal lines is relatively thin.
    Type: Grant
    Filed: August 23, 2005
    Date of Patent: July 24, 2007
    Inventors: Jun Chang Chen, Ya-Hsiang Tai