Patents by Inventor Chang LIAO

Chang LIAO 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: 20190293981
    Abstract: A cholesteric liquid crystal writing board can display a writing track, and comprises a cholesteric liquid crystal device, a photo-sensing array layer, a sensing-signal processing circuitry and a voltage control circuitry. The cholesteric liquid crystal device comprises a plurality of liquid crystal control areas. The photo-sensing array layer comprises a plurality of photo-sensing dot-areas arranged in an array, a photo-sensing element of the photo-sensing dot-area senses a luminous flux change and generates a sensing signal. The sensing-signal processing circuitry receives the sensing signal and accordingly outputs position data of the photo-sensing element in the photo-sensing array layer.
    Type: Application
    Filed: May 8, 2018
    Publication date: September 26, 2019
    Inventors: Chi-Chang LIAO, Shu-Shien LIU, Tsung-Ming PAI, Fu-Ming WANG
  • Publication number: 20190285923
    Abstract: A cholesteric liquid crystal writing board comprises a cholesteric liquid crystal device, a photo-sensing array layer and a sensing-signal processing circuitry. The cholesteric liquid crystal device comprises a cholesteric liquid crystal layer, and has a light-entering surface and a light-emitting surface opposite to the light-entering surface. The photo-sensing array layer comprises a plurality of photo-sensing elements arranged in an array. The photo-sensing array layer is disposed on one side of the light-emitting surface of the cholesteric liquid crystal device. When at least a portion of the cholesteric liquid crystal layer is morphologically changed due to a pressure caused by a press to generate a luminous flux change, one of the photo-sensing elements of the photo-sensing array layer senses the luminous flux change and generates a sensing signal accordingly.
    Type: Application
    Filed: April 30, 2018
    Publication date: September 19, 2019
    Inventors: Chi-Chang LIAO, Shu-Shien LIU, Tsung-Ming PAI, Fu-Ming WANG
  • Publication number: 20190046060
    Abstract: The present invention provides a system and a method for measuring physiological signal. The system includes a plurality of electrodes and a measurement apparatus. A plurality of first electrodes of the electrodes are attached on a first area of a subject. A plurality of second electrodes of the electrodes are attached on a second area of the subject. The measurement apparatus is coupled to the electrodes and performs testing on the first electrodes and the second electrodes to obtain a plurality of testing results. The measurement apparatus selects one of the first electrodes as a first measuring electrode and selects one of the second electrodes as a second measuring electrode according to the testing results. The measurement apparatus measures a physiological signal of the subject through the first measuring electrode and the second measuring electrode.
    Type: Application
    Filed: October 26, 2017
    Publication date: February 14, 2019
    Applicant: Singular Wings Medical Co., Ltd.
    Inventor: Chin-Chang Liao
  • Publication number: 20180367790
    Abstract: The invention relates to a method and apparatus for evaluating a network and for predicting network performance for a higher order modulation by analyzing network signals modulated using a lower order modulation format. A margin index may be generated for the current or projected modulation formats based on displacement vectors for received symbols to indicate a margin remaining before a codeword error occurs to alert the network operator of potential performance issues before actual codeword errors occur.
    Type: Application
    Filed: June 20, 2018
    Publication date: December 20, 2018
    Applicant: VIAVI SOLUTIONS INC.
    Inventors: Jim WALSH, Ching-Chang LIAO
  • Patent number: 10140498
    Abstract: A method for forming a sensing device includes providing a first substrate. The first substrate has a first surface and a second surface opposite thereto. A sensing region is adjacent to the first surface. A temporary cover plate is provided on the second surface to cover the sensing region. The method also includes forming a redistribution layer on the second surface and electrically connected to the sensing region. The method further includes removing the temporary cover plate after the formation of the redistribution layer. The first substrate is bonded to a second substrate and a cover plate after the removal of the temporary cover plate so that the first substrate is positioned between the second substrate and the cover plate. In addition, the method includes filling an encapsulating layer between the second substrate and the cover plate to surround the first substrate.
    Type: Grant
    Filed: October 19, 2016
    Date of Patent: November 27, 2018
    Assignee: XINTEC INC.
    Inventors: Tsang-Yu Liu, Ying-Nan Wen, Chi-Chang Liao, Yu-Lung Huang
  • Publication number: 20180263525
    Abstract: A physiological signal receiving apparatus and a manufacturing method thereof are provided. The physiological signal receiving apparatus includes an electrode layer, a protective layer and a conductive structure electrically connected to the electrode layer. The electrode layer is disposed on a substrate. The electrode layer includes a porous gel and a plurality of conductive particles distributed therein. The protective layer is disposed on the substrate and the electrode layer. The protective layer has an opening exposing a portion of the electrode layer. The porous gel is expanded after absorbing liquid, such that a surface of the electrode layer exposed by the opening is higher than a surface of the protective layer.
    Type: Application
    Filed: May 16, 2017
    Publication date: September 20, 2018
    Applicant: Singular Wings Medical Co., Ltd.
    Inventors: Chin-Chang Liao, Chen-Hao Lee
  • Patent number: 10027955
    Abstract: The invention relates to a method and apparatus for evaluating a network and for predicting network performance for a higher order modulation by analyzing network signals modulated using a lower order modulation format. A margin index may be generated for the current or projected modulation formats based on displacement vectors for received symbols to indicate a margin remaining before a codeword error occurs to alert the network operator of potential performance issues before actual codeword errors occur.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: July 17, 2018
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Jim Walsh, Ching-Chang Liao
  • Patent number: 9978788
    Abstract: A method for forming a photosensitive module is provided. The method includes providing a sensing device. The sensing device includes a conducting pad located on a substrate. A first opening penetrates the substrate and exposes the conducting pad. A redistribution layer is in the first opening to electrically connect to the conducting pad. A cover plate is located on the substrate and covers the conducting pad. The method also includes removing the cover plate of the sensing device. The method further includes bonding the sensing device to a circuit board after the removal of the cover plate. The redistribution layer in the first opening is exposed and faces the circuit board. In addition, the method includes mounting an optical component corresponding to the sensing device on the circuit board. A photosensitive module formed by the method is also provided.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: May 22, 2018
    Assignee: XINTEC INC.
    Inventors: Yen-Shih Ho, Tsang-Yu Liu, Chi-Chang Liao
  • Patent number: 9966400
    Abstract: A method for forming a photosensitive module is provided. The method includes providing a sensing device. The sensing device includes a substrate having a first surface and a second surface opposite thereto. A conducting pad is located on the first surface. A first opening penetrates the substrate and exposes the conducting pad. A redistribution layer is in the first opening to electrically connect to the conducting pad. A cover plate is located on the first surface and covers the conducting pad. The method also includes bonding the sensing device to a circuit board. The cover plate is removed after bonding the sensing device to the circuit board. The method further includes mounting an optical component corresponding to the sensing device on the circuit board. A photosensitive module formed by the method is also provided.
    Type: Grant
    Filed: January 25, 2016
    Date of Patent: May 8, 2018
    Assignee: XINTEC INC.
    Inventors: Tsang-Yu Liu, Chi-Chang Liao
  • Patent number: 9905198
    Abstract: A display panel includes a first substrate, a shading module, a second substrate, optical sensors, and a parallel-to-serial converter. The shading module is disposed on the first substrate. The second substrate is disposed corresponding to the first substrate. The optical sensors are disposed on the second substrate, and are disposed corresponding to the shading module. The optical sensors are configured to output sensing signals according to an offset amount between the optical sensors and the shading module. One of the optical sensors includes a first switch and a second switch, in which the first switch and the second switch are coupled in cascade. The parallel-to-serial converter is configured to generate the serial signal according to the sensing signals.
    Type: Grant
    Filed: June 6, 2016
    Date of Patent: February 27, 2018
    Assignee: AU OPTRONICS CORPORATION
    Inventors: Yu-Jung Huang, Wen-Chang Liao, Ting-Cheng Lin
  • Patent number: 9893764
    Abstract: Apparatus and method are provided for obtaining an upstream signal spectrum as it was during a time of transmission of a received upstream data packet. The apparatus includes an analog-to-digital converter (ADC), a packet detector coupled to ADC, and a spectrum calculation unit coupled to the ADC and the packet detector. In operation, the spectrum calculation unit computes a spectrum of the digitized upstream signal as it was between the start and end times of the first packet. As a result, the obtained spectrum is representative of a condition of the transmission path during transmission of the upstream data packet.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: February 13, 2018
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Adam D. Gray, Daniel K. Chappell, Ching-Chang Liao
  • Patent number: 9853074
    Abstract: This present invention provides a chip scale sensing chip package, comprising: a sensing chip with a first top surface and a first bottom surface opposite to each other, comprising: a sensing device adjacent to the first top surface; and a plurality of conductive pads adjacent to first top surface and the sensing device; a wiring layer formed on the first bottom surface and connected to each of the conductive pads; a dam having a supporter with a first opening and a spacer with a second opening formed on the first top surface, wherein the supporter is within the second opening and adjacent to the spacer, and the spacer is higher than the supporter by a predetermined distance d; a lens formed on the first top surface exposed by the first opening and above the sensing device; and an optical filter deposed on the supporter and above the lens.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: December 26, 2017
    Assignee: XINTEC INC.
    Inventors: Ho-Yin Yiu, Chi-Chang Liao, Shih-Yi Lee, Yen-Kang Raw
  • Publication number: 20170328876
    Abstract: The instant disclosure provides a gas concentration detection device including a plurality of gas concentration measurement modules and a control module. The control module coupled with the plurality of gas concentration measurement modules. Each gas concentration measurement module including: a gas chamber, a signal generating unit and a sensing unit. The control module providing a plurality of clock signals, wherein each clock signal controls the corresponding signal generating unit to correspondingly generate the medium to enter the gas chamber and pass through the gas. The sensing unit outputs a sensing signal by receiving the medium, and the control module corrects the sensing signals from the sensing units to respectively obtain corrected sensing signals, and the corrected sensing signals are integrated by the control module to obtain a gas concentration signal.
    Type: Application
    Filed: May 12, 2016
    Publication date: November 16, 2017
    Inventors: YU-CHIEN HUANG, CHIEN-CHANG LIAO, YU-TAI SUNG
  • Publication number: 20170230079
    Abstract: Apparatus and method are provided for obtaining an upstream signal spectrum as it was during a time of transmission of a received upstream data packet. The apparatus includes an analog-to-digital converter (ADC), a packet detector coupled to ADC, and a spectrum calculation unit coupled to the ADC and the packet detector. In operation, the spectrum calculation unit computes a spectrum of the digitized upstream signal as it was between the start and end times of the first packet. As a result, the obtained spectrum is representative of a condition of the transmission path during transmission of the upstream data packet.
    Type: Application
    Filed: April 26, 2017
    Publication date: August 10, 2017
    Applicant: VIAVI SOLUTIONS INC.
    Inventors: Adam D. GRAY, Daniel K. CHAPPELL, Ching-Chang LIAO
  • Publication number: 20170213865
    Abstract: This present invention provides a chip scale sensing chip package, comprising: a sensing chip with a first top surface and a first bottom surface opposite to each other, comprising: a sensing device adjacent to the first top surface; and a plurality of conductive pads adjacent to first top surface and the sensing device; a wiring layer formed on the first bottom surface and connected to each of the conductive pads; a dam having a supporter with a first opening and a spacer with a second opening formed on the first top surface, wherein the supporter is within the second opening and adjacent to the spacer, and the spacer is higher than the supporter by a predetermined distance d; a lens formed on the first top surface exposed by the first opening and above the sensing device; and an optical filter deposed on the supporter and above the lens.
    Type: Application
    Filed: January 19, 2017
    Publication date: July 27, 2017
    Inventors: Ho-Yin YIU, Chi-Chang LIAO, Shih-Yi LEE, Yen-Kang RAW
  • Patent number: 9711425
    Abstract: A sensing module is provided. The sensing module includes a sensing device. The sensing device includes a first substrate having a first surface and a second surface opposite thereto. The sensing device also includes a sensing region adjacent to the first surface and a conducting pad on the first surface. The sensing device further includes a redistribution layer on the second surface and electrically connected to the conducting pad. The sensing module also includes a second substrate and a cover plate bonded to the sensing device so that the sensing device is between the second substrate and the cover plate. The conducting pad is electrically connected to the second substrate through the redistribution layer. The sensing module further includes an encapsulating layer filled between the second substrate and the cover plate to surround the sensing device.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: July 18, 2017
    Assignee: XINTEC INC.
    Inventors: Shu-Ming Chang, Po-Chang Huang, Tsang-Yu Liu, Yu-Lung Huang, Chi-Chang Liao
  • Publication number: 20170180726
    Abstract: The invention relates to a method and apparatus for evaluating a network and for predicting network performance for a higher order modulation by analyzing network signals modulated using a lower order modulation format. A margin index may be generated for the current or projected modulation formats based on displacement vectors for received symbols to indicate a margin remaining before a codeword error occurs to alert the network operator of potential performance issues before actual codeword errors occur.
    Type: Application
    Filed: March 2, 2017
    Publication date: June 22, 2017
    Applicant: VIAVI SOLUTIONS INC.
    Inventors: Jim WALSH, Ching-Chang LIAO
  • Publication number: 20170116458
    Abstract: A method for forming a sensing device includes providing a first substrate. The first substrate has a first surface and a second surface opposite thereto. A sensing region is adjacent to the first surface. A temporary cover plate is provided on the second surface to cover the sensing region. The method also includes forming a redistribution layer on the second surface and electrically connected to the sensing region. The method further includes removing the temporary cover plate after the formation of the redistribution layer. The first substrate is bonded to a second substrate and a cover plate after the removal of the temporary cover plate so that the first substrate is positioned between the second substrate and the cover plate. In addition, the method includes filling an encapsulating layer between the second substrate and the cover plate to surround the first substrate.
    Type: Application
    Filed: October 19, 2016
    Publication date: April 27, 2017
    Inventors: Tsang-Yu LIU, Ying-Nan WEN, Chi-Chang LIAO, Yu-Lung HUANG
  • Publication number: 20170117242
    Abstract: A chip package is provided. The chip package includes a substrate. The substrate includes a sensing region or device region. The chip package also includes a first conducting structure disposed on the substrate. The first conducting structure is electrically connected to the sensing region or device region. The chip package further includes a passive element vertically stacked on the substrate. The passive element and the first conducting structure are positioned side by side.
    Type: Application
    Filed: October 19, 2016
    Publication date: April 27, 2017
    Inventors: Yen-Shih HO, Tsang-Yu LIU, Po-Han LEE, Chi-Chang LIAO
  • Patent number: 9634722
    Abstract: Apparatus and method are provided for obtaining an upstream signal spectrum as it was during a time of transmission of a received upstream data packet. The apparatus includes an analog-to-digital converter (ADC), a packet detector coupled to ADC, and a spectrum calculation unit coupled to the ADC and the packet detector. In operation, the spectrum calculation unit computes a spectrum of the digitized upstream signal as it was between the start and end times of the first packet. As a result, the obtained spectrum is representative of a condition of the transmission path during transmission of the upstream data packet.
    Type: Grant
    Filed: July 3, 2014
    Date of Patent: April 25, 2017
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Adam D. Gray, Daniel K. Chappell, Ching-Chang Liao