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).
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Publication number: 20190293981Abstract: 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: ApplicationFiled: May 8, 2018Publication date: September 26, 2019Inventors: Chi-Chang LIAO, Shu-Shien LIU, Tsung-Ming PAI, Fu-Ming WANG
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Publication number: 20190285923Abstract: 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: ApplicationFiled: April 30, 2018Publication date: September 19, 2019Inventors: Chi-Chang LIAO, Shu-Shien LIU, Tsung-Ming PAI, Fu-Ming WANG
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Publication number: 20190046060Abstract: 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: ApplicationFiled: October 26, 2017Publication date: February 14, 2019Applicant: Singular Wings Medical Co., Ltd.Inventor: Chin-Chang Liao
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Publication number: 20180367790Abstract: 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: ApplicationFiled: June 20, 2018Publication date: December 20, 2018Applicant: VIAVI SOLUTIONS INC.Inventors: Jim WALSH, Ching-Chang LIAO
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Patent number: 10140498Abstract: 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: GrantFiled: October 19, 2016Date of Patent: November 27, 2018Assignee: XINTEC INC.Inventors: Tsang-Yu Liu, Ying-Nan Wen, Chi-Chang Liao, Yu-Lung Huang
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Publication number: 20180263525Abstract: 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: ApplicationFiled: May 16, 2017Publication date: September 20, 2018Applicant: Singular Wings Medical Co., Ltd.Inventors: Chin-Chang Liao, Chen-Hao Lee
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Patent number: 10027955Abstract: 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: GrantFiled: March 2, 2017Date of Patent: July 17, 2018Assignee: VIAVI SOLUTIONS INC.Inventors: Jim Walsh, Ching-Chang Liao
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Patent number: 9978788Abstract: 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: GrantFiled: January 25, 2016Date of Patent: May 22, 2018Assignee: XINTEC INC.Inventors: Yen-Shih Ho, Tsang-Yu Liu, Chi-Chang Liao
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Patent number: 9966400Abstract: 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: GrantFiled: January 25, 2016Date of Patent: May 8, 2018Assignee: XINTEC INC.Inventors: Tsang-Yu Liu, Chi-Chang Liao
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Patent number: 9905198Abstract: 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: GrantFiled: June 6, 2016Date of Patent: February 27, 2018Assignee: AU OPTRONICS CORPORATIONInventors: Yu-Jung Huang, Wen-Chang Liao, Ting-Cheng Lin
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Patent number: 9893764Abstract: 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: GrantFiled: April 26, 2017Date of Patent: February 13, 2018Assignee: VIAVI SOLUTIONS INC.Inventors: Adam D. Gray, Daniel K. Chappell, Ching-Chang Liao
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Patent number: 9853074Abstract: 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: GrantFiled: January 19, 2017Date of Patent: December 26, 2017Assignee: XINTEC INC.Inventors: Ho-Yin Yiu, Chi-Chang Liao, Shih-Yi Lee, Yen-Kang Raw
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Publication number: 20170328876Abstract: 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: ApplicationFiled: May 12, 2016Publication date: November 16, 2017Inventors: YU-CHIEN HUANG, CHIEN-CHANG LIAO, YU-TAI SUNG
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Publication number: 20170230079Abstract: 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: ApplicationFiled: April 26, 2017Publication date: August 10, 2017Applicant: VIAVI SOLUTIONS INC.Inventors: Adam D. GRAY, Daniel K. CHAPPELL, Ching-Chang LIAO
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Publication number: 20170213865Abstract: 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: ApplicationFiled: January 19, 2017Publication date: July 27, 2017Inventors: Ho-Yin YIU, Chi-Chang LIAO, Shih-Yi LEE, Yen-Kang RAW
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Patent number: 9711425Abstract: 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: GrantFiled: August 15, 2016Date of Patent: July 18, 2017Assignee: XINTEC INC.Inventors: Shu-Ming Chang, Po-Chang Huang, Tsang-Yu Liu, Yu-Lung Huang, Chi-Chang Liao
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Publication number: 20170180726Abstract: 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: ApplicationFiled: March 2, 2017Publication date: June 22, 2017Applicant: VIAVI SOLUTIONS INC.Inventors: Jim WALSH, Ching-Chang LIAO
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Publication number: 20170116458Abstract: 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: ApplicationFiled: October 19, 2016Publication date: April 27, 2017Inventors: Tsang-Yu LIU, Ying-Nan WEN, Chi-Chang LIAO, Yu-Lung HUANG
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Publication number: 20170117242Abstract: 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: ApplicationFiled: October 19, 2016Publication date: April 27, 2017Inventors: Yen-Shih HO, Tsang-Yu LIU, Po-Han LEE, Chi-Chang LIAO
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Patent number: 9634722Abstract: 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: GrantFiled: July 3, 2014Date of Patent: April 25, 2017Assignee: VIAVI SOLUTIONS INC.Inventors: Adam D. Gray, Daniel K. Chappell, Ching-Chang Liao