Patents by Inventor Wein-Town Sun

Wein-Town Sun 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: 7554513
    Abstract: An organic light emitting diode (OLED) display includes a first and a second digital/analog current converters, a feedback unit and a compensating unit. The feedback unit includes the first and second feedback circuits for generating the first and second feedback currents, respectively. The compensating unit includes the first and second compensating circuits for outputting the first and second compensating voltages as the first and second reference voltages for the first and second digital/analog current converters in accordance with the first and second feedback currents, respectively. The luminance change of the first and second pixels is positively proportional to the first and second feedback current change. Therefore, the first and second compensating voltages are changed accordingly, and the first and second reference voltages are regulated so as to compensate for the luminance of the first and second pixels.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: June 30, 2009
    Assignee: Au Optronics Corp.
    Inventors: Wein-Town Sun, Jung-Chun Tseng
  • Patent number: 7550770
    Abstract: A dual gate layout of a thin film transistor of liquid crystal display to alleviate dark current leakage is disclosed. The layout comprises (1) a polysilicon on a substrate having a L-shaped or a snake shaped from top-view, which has a heavily doped source region, a first lightly doped region, a first gate channel, a second lightly doped region, a second gate channel, a third lightly doped region and a heavily doped drain region formed in order therein; (2) a gate oxide layer formed on the polysilicon layer and the substrate, (3) a gate metal layer then formed on the gate oxide layer having a scanning line and an extension portion with a L-shaped or an I-shaped. The gate metal intersects with the polysilicon layer thereto define the forgoing gate channels. Among of gate channels, at least one is along the signal line, which is connected to the source region through a source contact.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: June 23, 2009
    Assignee: Au Optronics Corp.
    Inventors: Wein-Town Sun, Chun-Sheng Li, Jian-Shen Yu
  • Patent number: 7545184
    Abstract: An analog buffer used in a source driver is provided. The analog buffer havs an input end, an output end, a transistor, first and second capacitors, first, second, third, fourth and fifth switches. The source and the drain of the transistor is coupled to the output end and receives a first voltage respectively. The first end of the first and the second capacitors are coupled to the gate of the transistor. The second end of the first and the second capacitors are coupled to the first end of the first, second and fourth switches and the first end of the third and fifth switches respectively. The second end of the first switch receives a second voltage. The second end of the second and third switches are coupled to the input end. The second end of the fourth and fifth switches are coupled to the output end.
    Type: Grant
    Filed: April 4, 2007
    Date of Patent: June 9, 2009
    Assignee: Au Optronics Corp.
    Inventor: Wein-Town Sun
  • Publication number: 20090141051
    Abstract: A method of compensating for luminance of an organic light emitting diode is provided. In an embodiment, an operational current of a dummy organic light emitting diode of a color is utilized to simulate the condition that a real pixel current attenuates with time, and a feedback current is outputted accordingly. A compensating voltage is generated according to the feedback current, and is used to regulates the data current inputted to the real pixel so as to compensate for the luminance of the real pixel of the color.
    Type: Application
    Filed: February 5, 2009
    Publication date: June 4, 2009
    Applicant: AU OPTRONICS CORP.
    Inventors: Wein-Town Sun, Jung-Chun Tseng
  • Patent number: 7525524
    Abstract: A data driving circuit and organic light emitting diode display, comprising a D/A converter, a switch unit, a first analog sampling storage circuit and a second analog sampling storage circuit. The first analog sampling storage circuit is controlled by a first signal for storing corresponding first analog transformed data in the first cycle, and controlled by a second signal for outputting first analog data corresponding to the first analog transformed data in the second cycle. The second analog sampling storage circuit is controlled by the second signal for storing the second analog transformed data in the second cycle, and controlled by the first signal for outputting second analog data corresponding to the second analog transformed data in a third cycle.
    Type: Grant
    Filed: May 10, 2005
    Date of Patent: April 28, 2009
    Assignee: Au Optronics Corp.
    Inventors: Jung-Chun Tseng, Shin-Hung Yeh, Wein-Town Sun
  • Publication number: 20090040167
    Abstract: A timing controller in an LCD has an OTP memory—a one time programmable nonvolatile memory or a MTP memory—a multiple time programmable nonvolatile memory embedded in for storing lookup tables of overdrive functions, dynamic contrast adjustments, independent RGB Gamma curve corrections, and data conversion of cyclic DAC functions. The logic process of the OTP memory and the logic process of the timing controller are completely compatible, and the logic process of the MTP memory only needs two or three photomask processes more than the logic process of the timing controller.
    Type: Application
    Filed: December 27, 2007
    Publication date: February 12, 2009
    Inventor: Wein-Town Sun
  • Publication number: 20090040163
    Abstract: A gamma voltage setting IC in an LCD with an OTP memory—a one time programmable nonvolatile memory or an MTP or flash memory—a multiple time programmable nonvolatile memory embedded in for storing lookup tables of the voltages of gamma curves and the common voltage values is capable of outputting a corresponding voltage mode according to the sensed result of a temperature sensor or an ambient luminance sensor. The logic process of the OTP memory and the logic process of the gamma voltage setting IC are completely compatible, and the logic process of the MTP or flash memory only needs two or three photomask processes more than the logic process of the gamma voltage setting IC.
    Type: Application
    Filed: March 11, 2008
    Publication date: February 12, 2009
    Inventor: Wein-Town Sun
  • Publication number: 20090028570
    Abstract: An analog-to-digital converter (ADC) for converting an optical signal into an electrical signal is disclosed. The ADC includes a detection module, a first P-type metal oxide semiconductor (PMOS) transistor, a first N-type metal oxide semiconductor (NMOS) transistor, a first switch unit, and an output module. The first PMOS transistor and the first NMOS transistor form an inverter. The first switch unit is disposed between the input terminal and the output terminal of the inverter and is turned on/off according to a first control signal. The output module is coupled to the output terminal of the inverter for counting the time that an input voltage is greater than a reference voltage and generating a digital signal.
    Type: Application
    Filed: December 21, 2007
    Publication date: January 29, 2009
    Applicant: AU OPTRONICS CORPORATION
    Inventors: Hung-Wei Tseng, Ling-Chang Hu, Shi-Hsiang Lu, Wein-Town Sun
  • Publication number: 20080252362
    Abstract: A negative voltage converter includes six transistors. A first end and a control end of a first transistor are coupled to a signal input. A first end of a second transistor is coupled to the signal input, and a control end of which is coupled to a first clock and the first transistor. A first end of a third transistor is coupled to the signal input, a control end of the third transistor is coupled with a second clock and the second transistor. A first end of a fourth transistor is coupled to the second end of the third transistor, a control end of which is coupled with the first clock and the third transistor. A first end of a fifth transistor is coupled to the second end of the third transistor, and a control end of which is coupled with the second clock and the fourth transistor A first end of a sixth transistor is coupled to the second end of the third transistor, and a control end of which is coupled with the first clock and the fifth transistor.
    Type: Application
    Filed: August 3, 2007
    Publication date: October 16, 2008
    Applicant: AU Optronics Corp.
    Inventors: Kung-hong Lee, Cheng-chiu Pai, Shi-hsiang Lu, Wein-town Sun
  • Publication number: 20080094533
    Abstract: An electrostatic discharge protection device, an electrostatic discharge protection structure, and a manufacturing process of the device are provided. The electrostatic discharge protection device includes at least four doping regions, wherein two adjacent regions are of different types. The electrostatic discharge protection structure includes an electrostatic discharge bus, a plurality of first electrostatic discharge protection devices connecting to the gates of the display transistors and the electrostatic discharge bus, a plurality of second electrostatic discharge protection devices connecting to the source/drain of the transistors and the electrostatic discharge bus, and a plurality of third electrostatic discharge protection devices connecting to the input/output terminals of the drive circuit of the display and the electrostatic discharge bus.
    Type: Application
    Filed: August 21, 2007
    Publication date: April 24, 2008
    Applicant: AU Optronics Corporation
    Inventors: Ming-Dou Ker, Chih-Kang Deng, Wein-Town Sun
  • Patent number: 7362624
    Abstract: A transistor level shifter circuit constituted by a plurality of PMOS TFT is included. The transistor level shifter circuit primarily includes a conversion circuit, a first amplifier circuit, and a second amplifier circuit. With the simplified circuit arrangement and a smaller quantity of required transistors, the transistor level shifter circuit is adapted to operate efficiency under both high RC load and frequency.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: April 22, 2008
    Assignee: AU Optronics Corp.
    Inventor: Wein-Town Sun
  • Patent number: 7348945
    Abstract: A electro-luminescent (EL) display panel includes a substrate, a pixel and a Digital-Analogy Converter (DAC). The substrate includes a first area and a second area. A Thin Film Transistor (TFT) formed in the first area has a first channel doping concentration, and a TFT formed in the second area has a second channel doping concentration. The pixel is disposed in the second area. The DAC includes switch circuits and current sources. Each switch circuit disposed in the second area is selectively turned on according to corresponding grey levels. Each current source disposed in the first area is electrically connected to the corresponding switch circuit and selectively supplying current to generate a pixel current according to conducting states of the corresponding switch circuit. A threshold voltage variation of the TFT formed in the first area is less than that of the TFT formed in the second area.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: March 25, 2008
    Assignee: Au Optronics Corp.
    Inventor: Wein-Town Sun
  • Publication number: 20080054954
    Abstract: An analog buffer used in a source driver is provided. The analog buffer havs an input end, an output end, a transistor, first and second capacitors, first, second, third, fourth and fifth switches. The source and the drain of the transistor is coupled to the output end and receives a first voltage respectively. The first end of the first and the second capacitors are coupled to the gate of the transistor. The second end of the first and the second capacitors are coupled to the first end of the first, second and fourth switches and the first end of the third and fifth switches respectively. The second end of the first switch receives a second voltage. The second end of the second and third switches are coupled to the input end. The second end of the fourth and fifth switches are coupled to the output end.
    Type: Application
    Filed: April 4, 2007
    Publication date: March 6, 2008
    Inventor: Wein-Town Sun
  • Patent number: 7339560
    Abstract: A pixel device of an electroluminescence device that comprises a voltage signal having a first state and a second state, a current signal, a first circuit further comprising a first transistor, a second transistor and a capacitor, the capacitor including a first terminal coupled to a power supply, the first transistor including a gate electrode coupled to a second terminal of the capacitor, and the second transistor including a gate electrode receiving the voltage signal, wherein the first circuit provides a voltage level across the capacitor in response to the first state of the voltage signal, and maintains the voltage level in response to the second state of the voltage signal, and a second circuit further comprising a third transistor and a fourth transistor, the third transistor including a gate electrode coupled to a gate electrode of the fourth transistor, wherein the second circuit provides a current proportional to the magnitude of the current signal in response to the first state of the voltage sign
    Type: Grant
    Filed: February 12, 2004
    Date of Patent: March 4, 2008
    Assignee: Au Optronics Corporation
    Inventor: Wein-Town Sun
  • Patent number: 7292210
    Abstract: The present invention provides a circuit for driving a flat panel display, including a storage capacitor, a transmission gate and a current-limiting transistor. A first terminal of the storage capacitor is coupled to a system voltage, and a second terminal of the storage capacitor is at storage voltage. A first input/output terminal of the transmission gate is coupled to the storage voltage, and the second input/output terminal of the transmission gate is coupled to the data current source. A first gate terminal of the transmission gate is coupled to the first signal; a second gate terminal of the transmission gate is coupled to the second signal. A gate terminal of the current-limiting transistor is coupled to the storage voltage, wherein a first source/drain terminal is coupled to the system voltage, and a second source/drain terminal provides current for driving the flat panel display.
    Type: Grant
    Filed: April 7, 2004
    Date of Patent: November 6, 2007
    Assignee: Au Optronics Corporation
    Inventor: Wein-Town Sun
  • Patent number: 7292219
    Abstract: A data driver for organic light emitting diode display is disclosed. A pixel data of K bits is divided into an N bits data and an M bits data. A number of N bits data are processed by a number of main digital-to-analog current converters and a number of main voltage storing current copier/current mirror so as to generate a number of main regenerating currents. Besides, a number of M bits data are processed by a number of secondary digital-to-analog current converters and a number of secondary voltage storing current copier/current mirror so as to generate a number of secondary regenerating currents. The brightness of the pixel is related to the sum of the corresponding main regenerating current and the corresponding secondary regenerating current. The invention can reduce the error resulted from the component variation of digital-to-analog converters.
    Type: Grant
    Filed: December 30, 2004
    Date of Patent: November 6, 2007
    Assignee: Au Optronics Corp.
    Inventor: Wein-Town Sun
  • Patent number: 7262750
    Abstract: A display apparatus includes a light-emitting device, a first scan line for transferring a first signal to select the light-emitting device, a data line for transferring a data current signal to drive the light-emitting device, a first transistor having a gate coupled to the first scan line for selecting the light-emitting device according to the first signal, and a current mirror electrically connected to the light-emitting device for transferring a driving current signal to drive the light-emitting device. The current mirror includes a second transistor having a gate coupled to the data line and one of the source and the drain of the first transistor for receiving the data current signal. In addition, the current mirror further includes a third transistor having a gate coupled to the other of the source and the drain of the first transistor for transferring the driving current signal.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: August 28, 2007
    Assignee: Au Optronics Corp.
    Inventor: Wein-Town Sun
  • Publication number: 20070171734
    Abstract: A transistor level shifter circuit constituted by a plurality of PMOS TFT is disclosed. The transistor level shifter circuit primarily comprises a conversion circuit, a first amplifier circuit, and a second amplifier circuit. With the simplified circuit arrangement and a smaller quantity of required transistors, the transistor level shifter circuit is adapted to operate efficiency under both high RC load and frequency.
    Type: Application
    Filed: June 23, 2006
    Publication date: July 26, 2007
    Applicant: AU OPTRONICS CORP.
    Inventor: Wein-Town Sun
  • Patent number: 7233325
    Abstract: A structure and a method for reducing source line resistance of a light emitting diode. A light emitting diode display has at least a light emitting diode, a power source and a power source line structure for guiding the power source to provide the required power for driving the light emitting diode. The structure for reducing the source line resistance has an insulation layer formed on at least a part of the source line structure. The insulation layer has at least two openings exposing the source line structure. A conductive layer is formed to cover the insulation layer and is in electrical contact with the source line structure through the openings. Thereby, the conductive layer and the source line are connected in parallel, and the resistance of the source line is thus reduced.
    Type: Grant
    Filed: November 13, 2003
    Date of Patent: June 19, 2007
    Assignee: Au Optronics Corporation
    Inventors: Jen-Yi Hu, Wein-Town Sun
  • Publication number: 20070111407
    Abstract: An electroluminescence (EL) device includes a substrate and a plurality of pixels formed on the substrate. Each pixel includes a first area including at least a first capacitor and a second capacitor, the first capacitor including a first conductive layer, a first dielectric layer over the first conductive layer, and a second conductive layer over the first dielectric layer, and the second capacitor including the second conductive layer, a second dielectric layer over the second conductive layer, and a third conductive layer over the second dielectric layer, and a second area including a first semiconductor layer formed on the substrate, a first gate oxide layer over the first semiconductor layer, and a fourth conductive layer over the first gate oxide layer.
    Type: Application
    Filed: December 28, 2006
    Publication date: May 17, 2007
    Applicant: AU OPTRONICS CORP.
    Inventor: Wein-Town Sun