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: 10339895
    Abstract: A brightness compensation circuitry includes a data-setting switch unit receiving a data-setting signal, a pixel unit including a pixel driving circuit that receives the data-setting signal during a data-input period to generate a driving current, and a compensation circuit receiving the driving current generated by the pixel driving circuit. The compensation circuit controls the data-setting switch unit to conduct or not conduct by determining whether or not a magnitude of the driving current conforms with a criterion that is associated with target brightness of the pixel unit.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: July 2, 2019
    Assignee: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Ya-Hsiang Tai, Xuan-Yong Lin, Chun-Yi Chang
  • Publication number: 20190088189
    Abstract: A display apparatus including a display panel is provided. The display panel has a plurality of display blocks, wherein each display block includes a light conversion circuit, a pixel array, and a data voltage selection circuit. The light conversion circuit receives the light pulse signal and has a pull-up circuit and a pull-down circuit, wherein the pull-up circuit and the pull-down circuit are coupled between a system high voltage and a system low voltage, and the pull-up circuit and the pull-down circuit output the system high voltage or system low voltage according to the light pulse signal to form a voltage pulse signal. The data voltage selection circuit is coupled to the light conversion circuit and the pixel array and receives an AC waveform voltage to supply a data signal to the pixel array according to the voltage pulse signal.
    Type: Application
    Filed: January 11, 2018
    Publication date: March 21, 2019
    Applicant: Au Optronics Corporation
    Inventors: Ya-Hsiang Tai, Chi-Hao Lin, Yu-Sheng Huang, Chang-Yi Li
  • Patent number: 9972236
    Abstract: A data line driving circuit for a display device having a plurality of data lines is provided to include a plurality of data line drivers respectively coupled to the data lines. Each data line driver includes a register unit to store video data having a pixel value, a pulse width modulation unit generating a PWM signal having a pulse width positively correlated with the pixel value, and a charge-discharge unit performing charge-discharge operation to generate a data voltage on a respective one of the data lines according to the PWM signal. A magnitude of voltage variation on the respective data line is positively correlated with the pulse width of the PWM signal during the charge-discharge operation.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: May 15, 2018
    Assignee: National Chiao Tung University
    Inventors: Ya-Hsiang Tai, Zong-Hua Cai, Ching-Chih Lin
  • Publication number: 20170169796
    Abstract: A brightness compensation circuitry includes a data-setting switch unit receiving a data-setting signal, a pixel unit including a pixel driving circuit that receives the data-setting signal during a data-input period to generate a driving current, and a compensation circuit receiving the driving current generated by the pixel driving circuit. The compensation circuit controls the data-setting switch unit to conduct or not conduct by determining whether or not a magnitude of the driving current conforms with a criterion that is associated with target brightness of the pixel unit.
    Type: Application
    Filed: December 8, 2016
    Publication date: June 15, 2017
    Applicant: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Ya-Hsiang TAI, Xuan-Yong LIN, Chun-Yi CHANG
  • Publication number: 20170116906
    Abstract: A data line driving circuit for a display device having a plurality of data lines is provided to include a plurality of data line drivers respectively coupled to the data lines. Each data line driver includes a register unit to store video data having a pixel value, a pulse width modulation unit generating a PWM signal having a pulse width positively correlated with the pixel value, and a charge-discharge unit performing charge-discharge operation to generate a data voltage on a respective one of the data lines according to the PWM signal. A magnitude of voltage variation on the respective data line is positively correlated with the pulse width of the PWM signal during the charge-discharge operation.
    Type: Application
    Filed: May 27, 2016
    Publication date: April 27, 2017
    Inventors: Ya-Hsiang TAI, Zong-Hua CAI, Ching-Chih LIN
  • Patent number: 9543954
    Abstract: A driver circuit with device variation compensation function and an operation method thereof are provided. The driver circuit includes a pull-up switch unit, an isolating switch and a pull-down switch unit. A first terminal of the pull-up switch unit is coupled to a first voltage. A second terminal of the pull-up switch unit is coupled to an output terminal of the driver circuit. A first terminal of the isolating switch is coupled to the second terminal of the pull-up switch unit. A first terminal of the pull-down switch unit is coupled to a second terminal of the isolating switch. A second terminal of the pull-down switch unit is coupled to a second voltage. The pull-down switch unit has a device variation compensation function.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: January 10, 2017
    Assignee: Industrial Technology Research Institute
    Inventors: Chi-Liang Wu, Ya-Hsiang Tai, Yung-Hui Yeh, Zong-Hua Cai
  • Patent number: 9343026
    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: Grant
    Filed: April 30, 2014
    Date of Patent: May 17, 2016
    Assignee: NATIONAL CHIAO TUNG UNIVERSITY
    Inventors: Ya-Hsiang Tai, Lu-Sheng Chou, Chun-Yu Lin, Chia-Hung Chang
  • Publication number: 20160112046
    Abstract: A driver circuit with device variation compensation function and an operation method thereof are provided. The driver circuit includes a pull-up switch unit, an isolating switch and a pull-down switch unit. A first terminal of the pull-up switch unit is coupled to a first voltage. A second terminal of the pull-up switch unit is coupled to an output terminal of the driver circuit. A first terminal of the isolating switch is coupled to the second terminal of the pull-up switch unit. A first terminal of the pull-down switch unit is coupled to a second terminal of the isolating switch. A second terminal of the pull-down switch unit is coupled to a second voltage. The pull-down switch unit has a device variation compensation function.
    Type: Application
    Filed: January 9, 2015
    Publication date: April 21, 2016
    Inventors: Chi-Liang Wu, Ya-Hsiang Tai, Yung-Hui Yeh, Zong-Hua Cai
  • 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