Patents by Inventor Tzu-Wei Liu

Tzu-Wei Liu 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: 8674284
    Abstract: The present invention provides a sensing device and a display device utilizing the sensing device. A photo sensing element of the sensing device is alternatively operated in a biased state and a reverse-biased state to prevent the stress issue. Furthermore, the sensing device improves the S/N ratio by generating an output signal through an active component. The display device including the sensing device prevents the stress issue and improves the S/N ratio by using specific driving signals.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: March 18, 2014
    Assignee: AU Optronics Corp.
    Inventors: Tzu-Wei Liu, Hsueh-Ying Huang
  • Patent number: 8436835
    Abstract: A touch device is disposed on a substrate having a plurality of gate lines. The touch device comprises a power line, a photo sensor and a readout line. The photo sensor is electrically coupled to the power line and two specific gate lines of the gate lines, and generated a different output signal according to irradiation with a different level. The readout line is electrically coupled to the photo sensor for outputting the output signal. The photo sensor comprises a readout switch and a photosensitive switch. The readout switch is electrically coupled to one of the two specific gate lines. The photosensitive switch is electrically coupled to another of the two specific gate lines and the power line. Signals in another of the two specific gate lines and the power line cooperate to determine whether the photosensitive switch is in an off state.
    Type: Grant
    Filed: January 9, 2010
    Date of Patent: May 7, 2013
    Assignee: AU Optronics Corp.
    Inventors: Tzu-Wei Liu, Hsueh-Ying Huang
  • Publication number: 20130093720
    Abstract: A method for determining touch position of a touch panel, which includes reading a voltage signal of a first sensing unit through a readout line in a first time slot of a frame period; reading a voltage signal of a second sensing unit through the readout line in a second time slot of the frame period; generating a difference by subtracting the voltage signal of the second sensing unit from the voltage signal of the first sensing unit, and determining whether the first sensing unit and the second sensing unit are touched according to the difference.
    Type: Application
    Filed: September 11, 2012
    Publication date: April 18, 2013
    Applicant: AU OPTRONICS CORP.
    Inventors: Tzu-Wei Liu, Hsueh-Ying Huang
  • Publication number: 20120293460
    Abstract: A photo sensing device suitable for an optical touch display panel and applications thereof are provided. The photo sensing device includes a photo sensing unit and a coupling unit. The photo sensing unit is used for sensing whether a touch event is happened/occurred or not, and accordingly outputting a judging signal. The coupling unit is coupled to the photo sensing unit, and is used for enhancing the sensitivity of the sensing unit, so as to increase a difference between the judging signal associated with occurrence of the touch event and the judging signal associated with non-occurrence of the touch event.
    Type: Application
    Filed: September 20, 2011
    Publication date: November 22, 2012
    Applicant: AU OPTRONICS CORPORATION
    Inventor: Tzu-Wei Liu
  • Publication number: 20120146936
    Abstract: A liquid crystal display having touch sensing functionality includes a display panel and a sensing unit integrated in the display panel. The display panel has a gate line for delivering a gate signal, a scan line for delivering a scan signal and a readout line for delivering a readout signal. The sensing unit resets a sense voltage according to the low-level voltage of the gate signal. Further, the sensing unit performs a pull-up operation on the sense voltage according to the high-level voltage of the gate signal and performs a boost operation on the sense voltage according to the high-level voltage of the scan signal, for enhancing touch sensitivity. The readout signal is generated by the sensing unit according to the sense voltage and the high-level voltage of the gate signal.
    Type: Application
    Filed: April 24, 2011
    Publication date: June 14, 2012
    Inventor: Tzu-Wei Liu
  • Publication number: 20120113055
    Abstract: The present invention provides a sensing device and a display device utilizing the sensing device. A photo sensing element of the sensing device is alternatively operated in a biased state and a reverse-biased state to prevent the stress issue. Furthermore, the sensing device improves the S/N ratio by generating an output signal through an active component. The display device including the sensing device prevents the stress issue and improves the S/N ratio by using specific driving signals.
    Type: Application
    Filed: May 9, 2011
    Publication date: May 10, 2012
    Inventors: Tzu-Wei Liu, Hsueh-Ying Huang
  • Publication number: 20120062508
    Abstract: A touch sensing apparatus and a touch sensing method are provided. The touch sensing apparatus includes a plurality of capacitance touch sensors and a post-processing circuit. Each of the capacitance touch sensors determines a value of an output current according to a distance between two electrodes of a touch sensing capacitor thereof. The post-processing circuit performs an integration operation for output currents to obtain a plurality of voltage values. The post-processing circuit further judge whether a touch event occurs according to a voltage difference between two voltage values corresponding to two capacitance touch sensors thereof, to further determine whether calculating a coordinate of a touch position. There is a linear relation between a variation of each of the voltage values and a variation of a distance between the two electrodes of the corresponding touch sensing capacitor.
    Type: Application
    Filed: July 29, 2011
    Publication date: March 15, 2012
    Applicant: AU OPTRONICS CORP.
    Inventors: Tzu-Wei LIU, Hsueh-Ying HUANG
  • Publication number: 20120050220
    Abstract: A touch panel is provided. The touch panel includes a pixel array including plural pixels arranged in matrix, plural scan lines electrically coupled to a corresponding pixel line of the pixel array, and at least one touch detection unit arranged corresponding to the pixel array. The touch detection unit includes a first transistor having a first transistor, a second transistor, and a touch detection circuit. The first transistor has a first terminal for receiving a first bias voltage, a second terminal, and a gate. The second transistor has a third terminal electrically coupled to the second terminal, a fourth terminal for receiving a second bias voltage, and a gate. The touch detection circuit includes a first capacitor and a second capacitor and is configured to output a touch signal according to the capacitance value of the first capacitor and the second capacitor when the touch panel is being touched.
    Type: Application
    Filed: August 23, 2011
    Publication date: March 1, 2012
    Applicant: AU OPTRONICS CORPORATION
    Inventor: Tzu-Wei Liu
  • Publication number: 20120001864
    Abstract: A flat panel display apparatus with touch function includes a plurality of scan lines, a plurality of data lines and a plurality of sense units. The data lines are arranged intersecting with the scan lines to divide the flat panel display apparatus into a plurality of pixel regions. The sense units are disposed into some of the pixel regions, and each of the sense units includes a sensor and a digital logic inverter. The sensor is for detecting whether the sense unit is touched and generating a corresponding sense signal. The digital logic inverter is electrically coupled to the sensor for generating an output signal according to the corresponding sense signal. The output signal is one of a first potential and a second potential, the first potential and the second potential are different from each other and respectively represent the sense unit is touched and untouched.
    Type: Application
    Filed: February 23, 2011
    Publication date: January 5, 2012
    Applicant: AU OPTRONICS CORP.
    Inventor: Tzu-Wei LIU
  • Publication number: 20110242044
    Abstract: The present invention in one aspect relates to an in-cell touch panel. In one embodiment, the in-cell touch panel includes at least one touch sensing device configured such that when a touch occurs, it responsively generates a first sensing signal and a second sensing signal that is different from the first sensing signal, and at least one reverse amplification circuit electrically coupled to the at least one touch sensing device for amplifying the difference between the first and second sensing signals.
    Type: Application
    Filed: April 6, 2010
    Publication date: October 6, 2011
    Applicant: AU OPTRONICS CORPORATION
    Inventor: Tzu-Wei Liu
  • Publication number: 20110169772
    Abstract: A touch device is disposed on a substrate having a plurality of gate lines. The touch device comprises a power line, a photo sensor and a readout line. The photo sensor is electrically coupled to the power line and two specific gate lines of the gate lines, and generated a different output signal according to irradiation with a different level. The readout line is electrically coupled to the photo sensor for outputting the output signal. The photo sensor comprises a readout switch and a photosensitive switch. The readout switch is electrically coupled to one of the two specific gate lines. The photosensitive switch is electrically coupled to another of the two specific gate lines and the power line. Signals in another of the two specific gate lines and the power line cooperate to determine whether the photosensitive switch is in an off state.
    Type: Application
    Filed: January 9, 2010
    Publication date: July 14, 2011
    Inventors: Tzu-Wei LIU, Hsueh-Ying HUANG
  • Publication number: 20110157505
    Abstract: A touch panel includes multiple sensing units and each thereof includes a first transistor, a reference capacitor, a liquid crystal capacitor and a second transistor. ON/OFF states of the first transistor are determined by a potential provided by a corresponding scan line. The reference capacitor and the liquid crystal capacitor are coupled in series between another scan line adjacent to the corresponding scan line and a common potential. A capacitance value of the liquid crystal capacitor changes with a pressed degree of the sensing unit. ON/OFF states the second transistor are determined by a potential at a connection node between the reference capacitor and the liquid crystal capacitor. The first transistor transmits a first potential to the connection node when the first transistor is turned on, and the second transistor transmits a second potential different from the first potential to a readout line when the second transistor is turned on.
    Type: Application
    Filed: December 14, 2010
    Publication date: June 30, 2011
    Applicant: AU OPTRONICS CORP.
    Inventor: Tzu-Wei LIU
  • Publication number: 20110090693
    Abstract: A building material whereinside an accommodating space is formed is disclosed. The building material includes a first area whereon at least one protruding part and at least one sunken part are formed alternately in a first direction, and a second area whereon at least one protruding part and at least one sunken part are formed alternately in the first direction. The protruding part of the second area aligns with the corresponding sunken part of the first area in a second direction substantially perpendicular to the first direction, and the sunken part of the second area aligns with the corresponding protruding part of the first area in the second direction.
    Type: Application
    Filed: August 27, 2010
    Publication date: April 21, 2011
    Inventors: Tzu-Wei Liu, Chian-Chi Huang, Min-Feng Huang
  • Publication number: 20110080071
    Abstract: A bicycle power supply module is for supplying power to electrical devices on a bicycle. The bicycle power supply module includes a bicycle hub dynamo mounted on a hub of the bicycle for generating an AC power, an AC to DC converting module coupled to the bicycle hub dynamo for converting the AC power generated by the bicycle hub dynamo into a DC power, an energy storage module for storing electrical energy, and a charger coupled to the AC to DC converting module and the energy storage module for receiving the DC power converted by the AC to DC converting module and for charging the energy storage module with the DC power.
    Type: Application
    Filed: October 6, 2009
    Publication date: April 7, 2011
    Inventors: Tzu-Wei Liu, Chian-Chi Huang, Min-Feng Huang
  • Publication number: 20100214774
    Abstract: A light emitting device is disclosed. The light emitting device includes a bottle, and a solar bulb for capping with the bottle. The solar bulb includes a housing, a solar panel disposed on the housing for converting solar energy into electric energy, a rechargeable battery module installed inside the housing for storing the electric energy generated by the solar panel, a light source installed inside the housing for emitting light to the bottle, and a control circuit installed inside the housing and coupled to the solar panel and the rechargeable battery module for transmitting the electric energy from the rechargeable battery module to the light source.
    Type: Application
    Filed: February 26, 2009
    Publication date: August 26, 2010
    Inventors: Tzu-Wei Liu, Chian-Chi Huang, Min-Feng Huang