Patents by Inventor Chang Tu

Chang Tu 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: 12341430
    Abstract: A circuit includes a signal modification circuit, a power stage circuit, and a boost converter circuit. The signal modification circuit generates a modified signal according to an input signal. The power stage circuit is electrically coupled to the signal modification circuit and receives a first voltage to amplify the modified signal and generate an output signal. The boost converter circuit selectively controls the amplitude of the first voltage. The signal modification circuit electrically coupled to the boost converter circuit. Therefore, the signal modification circuit is configured to dynamically adjust its own gain corresponding to the value of the first voltage, and the input signal is modified into the modified signal based on the gain of the signal modification circuit.
    Type: Grant
    Filed: December 9, 2022
    Date of Patent: June 24, 2025
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventors: Chen-Fong Liao, Yi-Chang Tu
  • Patent number: 12282560
    Abstract: A method for blocking an external boot device, a non-transient computer readable storage medium, and a computer are provided. The method includes: executing BIOS program code in a POST process, where the program code includes a BIOS setup menu, which includes a boot device option; hiding device information of an external boot device in the boot device option when determining that the external boot device is classified as a restricted device; displaying a boot device menu when determining that received input information is consistent with a piece of hot key information, where the boot device menu includes the device information of the external boot device; displaying a password input window when determining that the external boot device corresponding to received selection information is classified as the restricted device; and reading the external boot device to execute operating system program code when determining that received password information matches a preset password.
    Type: Grant
    Filed: March 28, 2023
    Date of Patent: April 22, 2025
    Assignee: MITAC COMPUTING TECHNOLOGY CORPORATION
    Inventor: Ming-Chang Tu
  • Patent number: 12275258
    Abstract: A printing device and the ribbon mounting mechanism thereof are disclosed. The ribbon mounting mechanism is used for mounting a first ribbon comprising a first core and a second ribbon comprising a second core having a diameter smaller than that of the first core. The ribbon mounting mechanism includes a first shaft supporting the first core of the first ribbon; a second shaft supporting the second core of the second ribbon, wherein the second shaft and the first shaft are concentrically disposed; a torque generator comprising a third shaft; a first gear set connecting the first shaft and the third shaft, and torque generated by the torque generator is transmitted to the first shaft through the first gear set; and a second gear set connecting the second shaft and the third shaft, and torque generated by the torque generator is transmitted to the second shaft through the second gear set.
    Type: Grant
    Filed: May 28, 2023
    Date of Patent: April 15, 2025
    Assignee: GODEX INTERNATIONAL CO., LTD
    Inventors: Feng-Yi Tai, Ching-Yang Chou, Che-Fu Hsu, Chun-Chang Tu
  • Publication number: 20240391263
    Abstract: A printing device and the ribbon mounting mechanism thereof are disclosed. The ribbon mounting mechanism is used for mounting a first ribbon comprising a first core and a second ribbon comprising a second core having a diameter smaller than that of the first core. The ribbon mounting mechanism includes a first shaft supporting the first core of the first ribbon; a second shaft supporting the second core of the second ribbon, wherein the second shaft and the first shaft are concentrically disposed; a torque generator comprising a third shaft; a first gear set connecting the first shaft and the third shaft, and torque generated by the torque generator is transmitted to the first shaft through the first gear set; and a second gear set connecting the second shaft and the third shaft, and torque generated by the torque generator is transmitted to the second shaft through the second gear set.
    Type: Application
    Filed: May 28, 2023
    Publication date: November 28, 2024
    Inventors: FENG-YI TAI, CHING-YANG CHOU, CHE-FU HSU, CHUN-CHANG TU
  • Patent number: 12095231
    Abstract: A vertical cavity surface emitting laser includes an active area, an inner trench, an outer trench, and a first implantation region. The active area includes a first mirror, an active region, a second mirror, and an etch stop layer. The first mirror is formed over a substrate. The active region is formed over the first mirror. The second mirror is formed over the active region. The etch stop layer with an aperture is formed between the active region and the second mirror. The inner trench surrounds the active area in a top view. The outer trench is formed beside the inner trench. The first implantation region is formed below the inner trench.
    Type: Grant
    Filed: March 25, 2021
    Date of Patent: September 17, 2024
    Assignee: WIN SEMICONDUCTORS CORP.
    Inventors: Min-Chang Tu, Jiun-Tsuen Lai, Wan-Ting Chien
  • Publication number: 20240222878
    Abstract: A multiple polarized dish antenna includes a main dish reflector and a multiple polarized antenna source. The main dish reflector includes an inner concave surface. The multiple polarized antenna source is at least partially disposed beside the inner concave surface. The inner concave surface of the main dish reflector reflects a radiation energy emitted by the multiple polarized antenna source. The multiple polarized antenna source includes a carrier, at least one radiator, and feeding portions. The carrier includes a conductive layer. The at least one radiator is disposed above the carrier. A resonance gap is between the at least one radiator and the conductive layer. The feeding portions are disposed beside the at least one radiator. A projection of each of the feeding portions on a plane where the corresponding radiator is located is at least partially overlapped with the radiator. each of the feeding portions is insulated from the conductive layer.
    Type: Application
    Filed: October 2, 2023
    Publication date: July 4, 2024
    Applicant: Gemtek Technology Co., Ltd.
    Inventors: Hsiao-Ching Chien, Hsu-Sheng Wu, Yi Chang Tu
  • Publication number: 20240014791
    Abstract: An amplifier system includes an output circuit, a processor circuit, a feedback circuit, and a controller circuit. The output circuit outputs an output signal and returns a digital output feedback signal. The processor circuit receives a filtered error audio signal and outputs a pulse width modulation control signal to the output circuit. An addition unit of the feedback circuit adds the negative value of the digital output feedback signal to the digital input signal to obtain the error audio signal. A variable filter unit of the feedback circuit filters the error audio signal and outputs the filtered error audio signal. A compensation unit of the variable filter unit changes the gain characteristics of the variable filter unit. The controller circuit adjusts one or more parameters of the compensation unit according to a pre-compensation signal so as to change the gain characteristics of the variable filter unit.
    Type: Application
    Filed: July 6, 2023
    Publication date: January 11, 2024
    Applicant: REALTEK SEMICONDUCTOR CORP.
    Inventors: Chen-Fong Liao, Yi-Chang Tu
  • Publication number: 20230366782
    Abstract: A buffer for holding a pipe adapted to transport a fluid includes a base. The buffer further includes a plurality of fingers extending outwardly from a first side of the base, wherein a first finger of the plurality of fingers and a second finger of the plurality of fingers define a cavity for receiving the pipe, the first finger extends outwardly from a first end of the base, and the second finger extends outwardly from a central portion of the base, and a third finger of plurality of fingers extends outwardly from a second end of the base opposite the first end, wherein the second finger is between the first finger and the third finger. The buffer further includes at least one roller on a second side of the base opposite the first side.
    Type: Application
    Filed: July 26, 2023
    Publication date: November 16, 2023
    Inventors: Po Yao LI, Shao Chang TU, Tsung-Ying WU, Wei Chih LIN
  • Publication number: 20230325510
    Abstract: A method for blocking an external boot device, a non-transient computer readable storage medium, and a computer are provided. The method includes: executing BIOS program code in a POST process, where the program code includes a BIOS setup menu, which includes a boot device option; hiding device information of an external boot device in the boot device option when determining that the external boot device is classified as a restricted device; displaying a boot device menu when determining that received input information is consistent with a piece of hot key information, where the boot device menu includes the device information of the external boot device; displaying a password input window when determining that the external boot device corresponding to received selection information is classified as the restricted device; and reading the external boot device to execute operating system program code when determining that received password information matches a preset password.
    Type: Application
    Filed: March 28, 2023
    Publication date: October 12, 2023
    Applicant: MITAC COMPUTING TECHNOLOGY CORPORATION
    Inventor: Ming-Chang TU
  • Patent number: 11754469
    Abstract: A method of monitoring wear of a buffer includes holding a pipe for transporting a fluid and an electrical cable using a buffer placed on a support plate. The buffer includes a base, a plurality of fingers, and a roller contacting the support plate. The plurality of fingers includes a first finger, a second finger, and a third finger. The first finger and the second finger define a first cavity for receiving the pipe, and the second finger and the third finger defines a second cavity for receiving the electrical cable. The method includes detecting acoustic waves generated by the roller on the support plate. The method further includes analyzing changes in frequencies of the acoustic waves to determine an extent of the wear of the roller over time. The method includes triggering an alert when an increase in the frequencies of the acoustic waves exceeds a pre-determined threshold value.
    Type: Grant
    Filed: June 29, 2022
    Date of Patent: September 12, 2023
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Po Yao Li, Shao Chang Tu, Tsung-Ying Wu, Wei Chih Lin
  • Publication number: 20230188039
    Abstract: A circuit includes a signal modification circuit, a power stage circuit, and a boost converter circuit. The signal modification circuit generates a modified signal according to an input signal. The power stage circuit is electrically coupled to the signal modification circuit and receives a first voltage to amplify the modified signal and generate an output signal. The boost converter circuit selectively controls the amplitude of the first voltage. The signal modification circuit electrically coupled to the boost converter circuit. Therefore, the signal modification circuit is configured to dynamically adjust its own gain corresponding to the value of the first voltage, and the input signal is modified into the modified signal based on the gain of the signal modification circuit.
    Type: Application
    Filed: December 9, 2022
    Publication date: June 15, 2023
    Applicant: REALTEK SEMICONDUCTOR CORP.
    Inventors: Chen-Fong LIAO, Yi-Chang TU
  • Patent number: 11635347
    Abstract: A buffer for holding a pipe adapted to transport a fluid is provided. The buffer includes a base, a plurality of fingers extending outwardly from a first side of the base. A first finger of the plurality of fingers and a second finger of the plurality of fingers define a cavity for receiving the pipe. The buffer further includes at least one roller on a second side of the base opposite the first side.
    Type: Grant
    Filed: October 7, 2019
    Date of Patent: April 25, 2023
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Po Yao Li, Shao Chang Tu, Tsung-Ying Wu, Wei Chih Lin
  • Patent number: 11509321
    Abstract: The present invention provides a receiving circuit, wherein the receiving circuit includes a first ADC, an attenuator, a second ADC, a harmonic generation circuit and an output circuit. In the operations of the receiving circuit, the first ADC performs an analog-to-digital operation on an analog input signal to generate a first digital output signal, the attenuator reduces strength of the analog input signal to generate an attenuated analog input signal, the second ADC performs the analog-to-digital operation on the attenuated analog input signal to generate a second digital input signal, the harmonic generation circuit generates at least one harmonic signal according to the second digital input signal, and the output circuit deletes a harmonic component of the first digital input signal by using the at least one harmonic signal to generate an output signal.
    Type: Grant
    Filed: December 17, 2020
    Date of Patent: November 22, 2022
    Assignee: Realtek Semiconductor Corp.
    Inventors: Chung-Chieh Cheng, Yi-Chang Tu
  • Publication number: 20220334028
    Abstract: A method of monitoring wear of a buffer includes holding a pipe for transporting a fluid and an electrical cable using a buffer placed on a support plate. The buffer includes a base, a plurality of fingers, and a roller contacting the support plate. The plurality of fingers includes a first finger, a second finger, and a third finger. The first finger and the second finger define a first cavity for receiving the pipe, and the second finger and the third finger defines a second cavity for receiving the electrical cable. The method includes detecting acoustic waves generated by the roller on the support plate. The method further includes analyzing changes in frequencies of the acoustic waves to determine an extent of the wear of the roller over time. The method includes triggering an alert when an increase in the frequencies of the acoustic waves exceeds a pre-determined threshold value.
    Type: Application
    Filed: June 29, 2022
    Publication date: October 20, 2022
    Inventors: Po Yao LI, Shao Chang TU, Tsung-Ying WU, Wei Chih LIN
  • Patent number: 11463058
    Abstract: The present invention provides a feedback system including a mixing circuit, a forward circuit, a feedback circuit, a feedback gain circuit and a control circuit. In the operations of the feedback system, the mixing circuit generates a mixed signal according to an input signal and a feedback signal, the forward circuit processes the mixed signal to generate an output signal, the feedback gain circuit and the feedback circuit generates the feedback signal according to the output signal, and the control circuit determines a feedback gain of the feedback gain circuit according to a gain of the forward circuit.
    Type: Grant
    Filed: October 12, 2020
    Date of Patent: October 4, 2022
    Assignee: Realtek Semiconductor Corp.
    Inventors: Shih-Hsin Lin, Yi-Chang Tu
  • Publication number: 20220311212
    Abstract: A vertical cavity surface emitting laser includes an active area, an inner trench, an outer trench, and a first implantation region. The active area includes a first mirror, an active region, a second mirror, and an etch stop layer. The first mirror is formed over a substrate. The active region is formed over the first mirror. The second mirror is formed over the active region. The etch stop layer with an aperture is formed between the active region and the second mirror. The inner trench surrounds the active area in a top view. The outer trench if formed beside the inner trench. The first implantation region is formed below the inner trench.
    Type: Application
    Filed: March 25, 2021
    Publication date: September 29, 2022
    Inventors: Min-Chang TU, Jiun-Tsuen LAI, Wan-Ting CHIEN
  • Patent number: 11277105
    Abstract: An audio device is adapted to receive and process a digital audio signal and output an analog audio signal. The audio device includes an adder, a digital-to-analog conversion circuit, an amplifying circuit, a voltage detecting circuit and an offset compensating circuit. The voltage detecting circuit detects a supply voltage received by the amplifying circuit. The offset compensating circuit generates a DC offset compensation value according to the supply voltage. The adder adds the digital audio signal and the DC offset compensation value to output an added signal. The digital-to-analog conversion circuit converts the added signal into a converted analog audio signal. The amplifying circuit amplifies the converted analog signal to output an amplified analog signal. Accordingly, the audio device can reduce pop noise caused by a DC offset.
    Type: Grant
    Filed: September 1, 2020
    Date of Patent: March 15, 2022
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventors: Shih-Hsin Lin, Che-Hung Lin, Yi-Chang Tu
  • Patent number: 11221259
    Abstract: A temperature computing parameter providing circuit, configured to generate sensing voltage values and calibrated voltage values as temperature computing parameters for a target electronic device, including: a parameter computing circuit, configured to compute a reference voltage, which is a cross voltage of a reference resistor coupled to the target electronic device in series, to generate a reference voltage value, and to compute the sensing voltage, which is a cross voltage of the target electronic device, to generate the sensing voltage value; a reference temperature sensing circuit, configured to sense a current reference temperature of the reference resistor; and a computing circuit, configured to calibrate the reference voltage value to generate the calibrated voltage value according to a calibrating function and the current reference temperature. The calibrating function corresponds to a resistance-temperature variation function.
    Type: Grant
    Filed: December 3, 2019
    Date of Patent: January 11, 2022
    Assignee: Realtek Semiconductor Corp.
    Inventors: Shin-Hao Chen, Yi-Chang Tu
  • Patent number: 11114984
    Abstract: An audio device for reducing pop noise is adapted to compensate for a direct current (DC) offset of an audio source signal and output the audio source signal to an audio playing device. The audio device includes a linear operation circuit, an adder, a digital-to-analog circuit, and an amplification circuit. The digital-to-analog circuit is coupled between the adder and the amplification circuit. The linear operation circuit generates a DC offset value based on a linear equation, a temperature parameter, a slope parameter, and a constant. The adder is configured to process an input signal and the DC offset value to generate a calibration signal. The digital-to-analog circuit is configured to convert a calibration signal in a digital form to a calibration signal in an analog form. The amplification circuit is configured to process the calibration signal in the analog form to output the audio source signal.
    Type: Grant
    Filed: July 24, 2019
    Date of Patent: September 7, 2021
    Assignee: REALTEK SEMICONDUCTOR CORP.
    Inventors: Shih-Hsin Lin, Che-Hung Lin, Yi-Chang Tu
  • Patent number: 11106709
    Abstract: The present disclosure provides a recommendation method and device, and a device for formulating recommendations. The recommendation method specifically includes obtaining a current context of an input method program after the input method program is triggered, analyzing data of past input actions by a current user under past contexts to obtain a target entry matching the current context in the data of the past input actions, and displaying the target entry. The present disclosure provides candidate entries to the user without any input operation by the user, thereby substantially improving the user's input efficiency.
    Type: Grant
    Filed: March 22, 2016
    Date of Patent: August 31, 2021
    Assignee: BEIJING SOGOU TECHNOLOGY DEVELOPMENT CO., LTD.
    Inventors: Chang Tu, Yang Zhang, Yanfeng Wang