Patents by Inventor Chin-Fu Chang

Chin-Fu Chang 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: 20240126388
    Abstract: A touch panel sequentially comprising: a first electrode layer, an elastic dielectric layer, and a second structure, the first electrode layer comprises one or more first electrodes in parallel to a first axis, the second structure comprises multiple second circuits in parallel to a second axis, multiple third circuits in parallel to the first axis, multiple second electrodes, and multiple switch circuits, wherein each of the switch circuits connects one of the second electrodes and one of the second circuits, respectively, wherein each of the switch circuits is configured to connect or disconnect the one of the second electrodes and the one of the second circuits according to signals transmitted from one of the third circuits, wherein each of the first electrodes covers at least one of the third circuits, the switch circuits configured by the at least covered one of the third circuits, and the second electrodes corresponding to the switch circuits.
    Type: Application
    Filed: August 2, 2023
    Publication date: April 18, 2024
    Inventor: Chin-Fu Chang
  • Publication number: 20240105629
    Abstract: A semiconductor package includes a first semiconductor die, a second semiconductor die, a semiconductor bridge, an integrated passive device, a first redistribution layer, and connective terminals. The second semiconductor die is disposed beside the first semiconductor die. The semiconductor bridge electrically connects the first semiconductor die with the second semiconductor die. The integrated passive device is electrically connected to the first semiconductor die. The first redistribution layer is disposed over the semiconductor bridge. The connective terminals are disposed on the first redistribution layer, on an opposite side with respect to the semiconductor bridge. The first redistribution layer is interposed between the integrated passive device and the connective terminals.
    Type: Application
    Filed: November 30, 2023
    Publication date: March 28, 2024
    Applicant: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Chen-Hsuan Tsai, Chin-Chuan Chang, Szu-Wei Lu, Tsung-Fu Tsai
  • Patent number: 11921947
    Abstract: A touch function setting method is provided. The method comprising: receiving a sequence parameter which includes multiple clicks, each of the clicks is corresponding to one of areas of a touch panel or screen; receiving a function parameter corresponding to the sequence parameter, the function parameter is corresponding to activate a function; and storing a group of touch function parameters, which includes the sequence parameter and the function parameter.
    Type: Grant
    Filed: February 18, 2022
    Date of Patent: March 5, 2024
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh, Chia-Ling Sun, Jia-Ming Chen
  • Patent number: 11775113
    Abstract: A pressure calibration function calculation method, applicable to a touch panel which sequentially comprises a first electrode layer, an elastic dielectric layer and a second electrode layer, the first electrode layer includes multiple first electrodes in parallel to a first axis, the second electrode layer includes multiple second electrodes in parallel to a second axis, the pressure calibration function calculating method comprising: when standard testing pressure is applied to one or more calibrating points corresponding to one or more vertex of multiple calibration areas of the touch panel, respectively, gathering a pressure sensing value of each of the calibrating points by utilizing mutual capacitance sensing between the multiple first electrodes and the multiple second electrodes; and calculating a pressure calibration function corresponding to each of the calibration areas according to a coordinate, the standard testing pressure and the pressure sensing value of each of the calibration areas.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: October 3, 2023
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Publication number: 20230259241
    Abstract: A touch panel, sequentially comprising: a conductive layer, a dielectric layer; and at least one layer of touch electrodes, which comprises multiple first electrodes in parallel to a first axis and multiple second electrodes in parallel to a second axis, wherein the first and the second electrodes connects to a touch sensitive processing apparatus, respectively, wherein the touch sensitive processing apparatus detects an external object approaching or touching the touch panel via the first and the second electrodes, wherein the conductive layer is closer to the external object than the at least one layer of touch electrodes.
    Type: Application
    Filed: April 25, 2023
    Publication date: August 17, 2023
    Inventors: CHIN-FU CHANG, SHANG-TAI YEH
  • Patent number: 11698692
    Abstract: A transmitter comprising: a signal modulator for transmitting electrical signals via an electrode, wherein the electrical signals carry a message representing a signal value; and a controller, coupled to the signal modulator, configured for having the signal modulator transmitting the electrical signals with a first duty cycle in a reference signal time period and transmitting the electrical signals with a second duty cycle in a modulation signal time period, wherein a first ratio corresponding to the second duty cycle and the first duty cycle is corresponding to the signal value, wherein the lengths of the reference signal time period and the modulation signal time period are the same, and wherein the maximum amplitudes of the electrical signals during the reference signal time period and the modulation signal time period are the same.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: July 11, 2023
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Publication number: 20230205364
    Abstract: A pressure calibration method, applicable to a touch panel which sequentially comprises a first electrode layer, an elastic dielectric layer and a second electrode layer, the first electrode layer includes multiple first electrodes in parallel to a first axis, the second electrode layer includes multiple second electrodes in parallel to a second axis, the pressure calibration method comprising: retrieving a depression event according to mutual capacitance sensing between the first electrodes and the second electrodes; finding a corresponding calibration area according to coordinate of the depression event; when a calibration area where the touching event locates exists, taking the found calibration area as the corresponding calibration area; otherwise, taking a nearby calibration area which is closest to the touching event as the corresponding calibration area; and calculating a calibrated pressure value according to a pressure sensing value of the depression event and a pressure calibration function of the c
    Type: Application
    Filed: February 24, 2023
    Publication date: June 29, 2023
    Inventors: CHIN-FU CHANG, SHANG-TAI YEH
  • Patent number: 11669214
    Abstract: A touch panel, sequentially comprising: a conductive layer, a dielectric layer; and at least one layer of touch electrodes, which comprises multiple first electrodes in parallel to a first axis and multiple second electrodes in parallel to a second axis, wherein the first and the second electrodes connects to a touch sensitive processing apparatus, respectively, wherein the touch sensitive processing apparatus detects an external object approaching or touching the touch panel via the first and the second electrodes, wherein the conductive layer is closer to the external object than the at least one layer of touch electrodes.
    Type: Grant
    Filed: January 20, 2022
    Date of Patent: June 6, 2023
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Patent number: 11662842
    Abstract: The present application provides a transmitter including a first sensor and a processing module electrically coupled to the first sensor. The processing module is configured to transmit a first electric signal during a first time period. The first electric signal represents at least one part of a digital sensing value of the first sensor.
    Type: Grant
    Filed: October 19, 2021
    Date of Patent: May 30, 2023
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Patent number: 11614831
    Abstract: A pressure calibration method, applicable to a touch panel which sequentially comprises a first electrode layer, an elastic dielectric layer and a second electrode layer, the first electrode layer includes multiple first electrodes in parallel to a first axis, the second electrode layer includes multiple second electrodes in parallel to a second axis, the pressure calibration method comprising: retrieving a depression event according to mutual capacitance sensing between the first electrodes and the second electrodes; finding a corresponding calibration area according to coordinate of the depression event; and calculating a calibrated pressure value according to a pressure sensing value of the depression event and a pressure calibration function of the corresponding calibration area.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: March 28, 2023
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Patent number: 11550422
    Abstract: A flexible touch screen, comprising: a flexible display with a first bending line, wherein the first bending line separates the flexible display into a first part and a second part; and a first touch panel and a second touch panel disposed in different sides of the first bending line, wherein the first and the second touch panels attach to the flexible display, each of the first and the second touch panels comprises first electrodes and second electrodes which are connected with a touch sensitive processing apparatus, the first and the second electrodes intersect each other.
    Type: Grant
    Filed: July 20, 2021
    Date of Patent: January 10, 2023
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Patent number: 11474640
    Abstract: A touch sensitive processing method for reducing interference from pixel refresh, comprising: sensing horizontal electrodes of a touch screen three times for gathering three sensing values, the sensing steps are separated by a time period; summing the three sensing values as sums; according to the sums, determining an external conductive object is disposed near a N-th horizontal electrode among the horizontal electrode of the touch screen; emitting driving signal from the N-th horizontal electrode and sensing the driving signal via vertical electrodes of the touch screen for gathering an N-th sensing array; and calculating a position of a touch event according to the N-th sensing array and the position of the N-th horizontal electrode.
    Type: Grant
    Filed: June 1, 2021
    Date of Patent: October 18, 2022
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Publication number: 20220308731
    Abstract: A touch sensitive processing method comprising: sensing a first characteristic value of the electrical signals received in a reference signal time period; sensing a second characteristic value of the electrical signals, having a first number of waves, received in a first modulation signal time period; sensing a third characteristic value of the electrical signals, having a second number of waves, received in a second modulation signal time period; calculating a first ratio of the second characteristic value and the first characteristic value and calculating a second ratio of the third characteristic value and first characteristic value; and calculating the signal value according to a function of the first ratio, the second ratio, the first number of waves and the second number of waves.
    Type: Application
    Filed: March 23, 2022
    Publication date: September 29, 2022
    Inventors: CHIN-FU CHANG, SHANG-TAI YEH
  • Publication number: 20220308678
    Abstract: A transmitter comprising: a signal modulator for transmitting electrical signals via an electrode, wherein the electrical signals carry a message representing a signal value; and a controller, coupled to the signal modulator, configured for having the signal modulator transmitting the electrical signals with a first duty cycle in a reference signal time period and transmitting the electrical signals with a second duty cycle in a modulation signal time period, wherein a first ratio corresponding to the second duty cycle and the first duty cycle is corresponding to the signal value, wherein the lengths of the reference signal time period and the modulation signal time period are the same, and wherein the maximum amplitudes of the electrical signals during the reference signal time period and the modulation signal time period are the same.
    Type: Application
    Filed: March 23, 2022
    Publication date: September 29, 2022
    Inventors: CHIN-FU CHANG, SHANG-TAI YEH
  • Patent number: 11442576
    Abstract: A touch sensitive processing method comprising: sensing a first characteristic value of the electrical signals received in a reference signal time period; sensing a second characteristic value of the electrical signals, having a first number of waves, received in a first modulation signal time period; sensing a third characteristic value of the electrical signals, having a second number of waves, received in a second modulation signal time period; calculating a first ratio of the second characteristic value and the first characteristic value and calculating a second ratio of the third characteristic value and first characteristic value; and calculating the signal value according to a function of the first ratio, the second ratio, the first number of waves and the second number of waves.
    Type: Grant
    Filed: March 23, 2022
    Date of Patent: September 13, 2022
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Patent number: 11435852
    Abstract: A touch sensitive processing method, comprising: generating modified codes of N orthogonal pseudo random number (PN) codes, each of PN code has M symbols, where M and N are positive integers larger than 1; transmitting driving signals modulated by the N modified codes via N first electrodes, respectively, and sensing via multiple second electrodes in a M symbols period to generate M one-dimensional sensing information arrays; calculating sums of corresponding elements of the M one-dimensional sensing information arrays corresponding to each of the second electrodes, respectively; determining whether each of the sums is in a range; and recording the M one-dimensional sensing information arrays and their corresponding N first electrodes and N PN codes in response to that at least one of the sums is determined out of the range.
    Type: Grant
    Filed: December 22, 2021
    Date of Patent: September 6, 2022
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Publication number: 20220269367
    Abstract: A touch function setting method is provided. The method comprising: receiving a sequence parameter which includes multiple clicks, each of the clicks is corresponding to one of areas of a touch panel or screen; receiving a function parameter corresponding to the sequence parameter, the function parameter is corresponding to activate a function; and storing a group of touch function parameters, which includes the sequence parameter and the function parameter.
    Type: Application
    Filed: February 18, 2022
    Publication date: August 25, 2022
    Inventors: CHIN-FU CHANG, SHANG-TAI YEH, CHIA-LING SUN, JIA-MING CHEN
  • Patent number: 11409379
    Abstract: The present invention provides a stylus for transmitting electrical signals carrying pressure information, comprising: a first component with variable impedance reflecting a pressure, wherein the first component is configured for receiving first signals encoded by a first pseudo-random number (PN) code; a second component with fixed impedance, wherein the second component is configured for receiving second signals encoded by a second PN code; and a conductive tip section configured for: receiving, simultaneously, the first signals from the first component and the second signals from the second component; and transmitting electrical signals which is composed of the first signals and the second signals, wherein the first PN code is orthogonal to the second PN code.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: August 9, 2022
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh
  • Publication number: 20220229518
    Abstract: A touch panel, sequentially comprising: a conductive layer, a dielectric layer; and at least one layer of touch electrodes, which comprises multiple first electrodes in parallel to a first axis and multiple second electrodes in parallel to a second axis, wherein the first and the second electrodes connects to a touch sensitive processing apparatus, respectively, wherein the touch sensitive processing apparatus detects an external object approaching or touching the touch panel via the first and the second electrodes, wherein the conductive layer is closer to the external object than the at least one layer of touch electrodes.
    Type: Application
    Filed: January 20, 2022
    Publication date: July 21, 2022
    Inventors: CHIN-FU CHANG, SHANG-TAI YEH
  • Patent number: 11392221
    Abstract: The present invention provides a touch sensitive processing apparatus for receiving electrical signals carrying pressure information transmitted from a first stylus, comprising: a sensing circuit, configured for receiving the electrical signals via electrodes of a touch panel; and a processor, coupled to the sensing circuit, configured for: despreading a first preamble code of the received electrical signals in accordance with a first pseudo-random number (PN) code; despreading a second preamble code of the received electrical signals in accordance with a second PN code; and calculating the pressure information according to a first signal strength ratio of a first part of the received electrical signal and a second part of the received electrical signal, wherein the first part comprises the first preamble code and the second part comprises the second preamble code, wherein the first PN code is orthogonal to the second PN code.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: July 19, 2022
    Assignee: EGALAX_EMPIA TECHNOLOGY INC.
    Inventors: Chin-Fu Chang, Shang-Tai Yeh