Patents by Inventor Yi-Cheng Chang

Yi-Cheng 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: 20240115616
    Abstract: The present disclosure provides a method for treating liver cirrhosis by using a composition including mesenchymal stem cells, extracellular vesicles produced by the mesenchymal stem cells, and growth factors. The composition of the present disclosure achieves the effect of treating liver cirrhosis through various efficacy experiments.
    Type: Application
    Filed: October 4, 2023
    Publication date: April 11, 2024
    Inventors: Po-Cheng Lin, Pi-Chun Huang, Zih-Han Hong, Ming-Hsi Chuang, Yi-Chun Lin, Chia-Hsin Lee, Chun-Hung Chen, Chao-Liang Chang, Kai-Ling Zhang
  • Patent number: 11955397
    Abstract: A semiconductor structure is provided. The semiconductor structure includes a substrate, a channel layer, a barrier layer, a compound semiconductor layer, a gate electrode, and a stack of dielectric layers. The channel layer is disposed on the substrate. The barrier layer is disposed on the channel layer. The compound semiconductor layer is disposed on the barrier layer. The gate electrode is disposed on the compound semiconductor layer. The stack of dielectric layers is disposed on the gate electrode. The stack of dielectric layers includes layers having different etching rates.
    Type: Grant
    Filed: November 9, 2020
    Date of Patent: April 9, 2024
    Assignee: Vanguard International Semiconductor Corporation
    Inventors: Shin-Cheng Lin, Cheng-Wei Chou, Ting-En Hsieh, Yi-Han Huang, Kwang-Ming Lin, Yung-Fong Lin, Cheng-Tao Chou, Chi-Fu Lee, Chia-Lin Chen, Shu-Wen Chang
  • Patent number: 11942543
    Abstract: A high-voltage semiconductor device structure is provided. The high-voltage semiconductor device structure includes a semiconductor substrate, a source ring in the semiconductor substrate, and a drain region in the semiconductor substrate. The high-voltage semiconductor device structure also includes a doped ring surrounding sides and a bottom of the source ring and a well region surrounding sides and bottoms of the drain region and the doped ring. The well region has a conductivity type opposite to that of the doped ring. The high-voltage semiconductor device structure further includes a conductor electrically connected to the drain region and extending over and across a periphery of the well region. In addition, the high-voltage semiconductor device structure includes a shielding element ring between the conductor and the semiconductor substrate. The shielding element ring extends over and across the periphery of the well region.
    Type: Grant
    Filed: June 29, 2022
    Date of Patent: March 26, 2024
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Hung-Chou Lin, Yi-Cheng Chiu, Karthick Murukesan, Yi-Min Chen, Shiuan-Jeng Lin, Wen-Chih Chiang, Chen-Chien Chang, Chih-Yuan Chan, Kuo-Ming Wu, Chun-Lin Tsai
  • Patent number: 11934239
    Abstract: In an embodiment, a circuit includes: an error amplifier; a temperature sensor, wherein the temperature sensor is coupled to the error amplifier; a discrete time controller coupled to the error amplifier, wherein the discrete time controller comprises digital circuitry; a multiple bits quantizer coupled to the discrete time controller, wherein the multiple bits quantizer produces a digital code output; and a heating array coupled to the multiple bits quantizer, wherein the heating array is configured to generate heat based on the digital code output.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: March 19, 2024
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Jui-Cheng Huang, Yi-Hsing Hsiao, Yu-Jie Huang, Tsung-Tsun Chen, Allen Timothy Chang
  • Publication number: 20240080376
    Abstract: A task dispatching method for EPD tag devices includes receiving a task command; the server system forwarding the task command to a target router to which the target EPD tag device is connected; the target router checking whether the target EPD tag device is currently connected thereto; when it is determined that the target EPD tag device is not currently connected to the target router, the target router notifying the server system that the target EPD tag device is offline; in response to receiving an online notification indicating that the target EPD tag device is connected to another router, the server system updating a connection list accordingly, and forwarding the task command to an updated target router; and when it is determined that the target EPD tag device is currently connected to the target router, the target router delivering the task command to the target EPD tag device.
    Type: Application
    Filed: April 27, 2023
    Publication date: March 7, 2024
    Inventors: Chih-Cheng Chang, Feng-Hsiang Chung, Yi-Bin Yu
  • Publication number: 20240038185
    Abstract: A backlight device to provide a light source is provided. The backlight device includes a switching element, a graphics processor, and a graphics generator. The graphics processor is electrically connected to the switching element, and generates a partition data signal. The graphics generator is electrically connected to the switching element, and generates an image signal. When the backlight device operates in a normal mode, the switching element receives the partition data signal, so that different blocks of the backlight device have different levels of brightness. When the backlight device operates in a safe mode, the switching element receives the image signal, so that different blocks of the backlight device have the same level of brightness.
    Type: Application
    Filed: June 15, 2023
    Publication date: February 1, 2024
    Inventors: Chueh-Yuan NIEN, Yu-Chien KAO, Li-Wei SUNG, Yi-Cheng CHANG
  • Patent number: 11888394
    Abstract: A switching power converter is provided with a one-shot bias boosting circuit that responds to a premature trip point to boost the performance of a linear comparator in a pulse width modulator. In a sense-amplifier based implementation of the comparator, a clock-edge generator boosts the performance of the sense amplifier at the premature trip point.
    Type: Grant
    Filed: August 31, 2021
    Date of Patent: January 30, 2024
    Assignee: DIALOG SEMICONDUCTOR (UK) LIMITED
    Inventors: Kevin Yi Cheng Chang, Kelly Consoer
  • Publication number: 20240003944
    Abstract: An electronic device is provided. The electronic device includes a panel, a detection system, and a test loop. The test loop is electrically connected to the panel and the detection system. The detection system includes a detection unit and a controller. The detection unit detects a signal transmitted by the test loop, and provides a detection result to the controller.
    Type: Application
    Filed: June 1, 2023
    Publication date: January 4, 2024
    Inventors: Chia-Min YEH, Hsieh-Li CHOU, Cheng-Tso CHEN, Yi-Cheng CHANG
  • Publication number: 20230422368
    Abstract: An electronic device includes a plurality of light-emitting elements, a temperature sensor, and a control element. The control element includes a storage unit, a comparison unit, and a first control unit. The storage unit stores a look-up table including different correspondences between different temperature ranges and different power thresholds. The comparison unit receives the first power consumption of the light-emitting elements, determines the predetermined power threshold in the different correspondences of the look-up table according to the ambient temperature, and compares the first power consumption with the predetermined power threshold to determine the second power consumption. The first power consumption is obtained by measuring the light-emitting elements. The first control unit drives the light-emitting elements according to the second power consumption.
    Type: Application
    Filed: May 11, 2023
    Publication date: December 28, 2023
    Inventors: Yi-Cheng CHANG, Wen-Tai CHIANG
  • Patent number: 11851435
    Abstract: Disclosed are compounds of formula (I) as follows: in which each of R1, R2, R3, R4, R5, L1, W, and Het is defined herein. Also provides are a method of inhibiting prostaglandin reductase 2 (“PTGR2”) using such a compound and a pharmaceutical composition containing same.
    Type: Grant
    Filed: March 7, 2022
    Date of Patent: December 26, 2023
    Assignees: National Health Research Institutes, National Taiwan University
    Inventors: Lun Kelvin Tsou, Ming-Shiu Hung, Chieh Wen Chen, Meng-Lun Hsieh, Yi-Cheng Chang, Lee Ming Chuang
  • Publication number: 20230373306
    Abstract: A vehicle system includes a vehicle computer, a display unit, a backlight unit, a diagnosis unit and a microcontroller. The vehicle computer is configured to output a plurality of signals for controlling the vehicle system. The display unit is configured to receive a display signal output by the vehicle computer, so as to display a frame. The backlight unit is configured to provide a light source of the display unit. The diagnosis circuit is configured to diagnose the state of the backlight unit. The microcontroller is electrically connected to the diagnosis circuit and the vehicle computer. When the backlight unit is diagnosed by the diagnosis unit, the display unit displays the frame at the same time.
    Type: Application
    Filed: April 14, 2023
    Publication date: November 23, 2023
    Inventors: Yi-Cheng CHANG, Nan-Chun LIN, Wen-Tai CHIANG
  • Publication number: 20230279008
    Abstract: Disclosed are compounds of formula (I) as follows: in which each of R1, R2, R3, R4, R5, L1, W, and Het is defined herein. Also provides are a method of inhibiting prostaglandin reductase 2 (“PTGR2”) using such a compound and a pharmaceutical composition containing same.
    Type: Application
    Filed: March 7, 2022
    Publication date: September 7, 2023
    Inventors: Lun Kelvin Tsou, Ming-Shiu Hung, Chieh Wen Chen, Meng-Lun Hsieh, Yi-Cheng Chang, Lee Ming Chuang
  • Publication number: 20220341965
    Abstract: An electronic device with function of recording falling and hitting events is provided. The electronic device includes a gravity sensing unit, a computing unit, and a memory unit. The gravity sensing unit is configured to generate a gravity sensing signal. The computing unit is electrically connected to the gravity unit and is configured to: continuously receive the gravity sensing signal; determine, based on the gravity sensing signal, whether the electronic device enters a falling state or not; determine, based on the gravity sensing signal, whether the electronic device encounters a hitting within a predetermined period of time or not after entering the falling state; and output a falling and hitting record when it is determined that the electronic device encounters a hitting. The memory unit is electrically connected to the computing unit and configured to store the falling and hitting record.
    Type: Application
    Filed: March 1, 2022
    Publication date: October 27, 2022
    Inventors: Chieh KAO, Yi- Cheng CHANG, Jheng-Siou CAI, Kai Yu HSU
  • Patent number: 11467202
    Abstract: The disclosure provides an electronic device and a diagnosis method of a light-emitting device. The light-emitting device includes at least one region, and each region of the at least one region has a plurality of light-emitting units. The diagnosis method includes the following steps. A plurality of light-emitting units of one of the at least one region are illuminated by a current. A voltage value corresponding to the current is compared with a first standard voltage value corresponding to a first standard current corresponding to the one of the at least one region. Whether the one of the at least one region is abnormal is determined according to a result of comparing the voltage value with the first standard voltage value. Therefore, the diagnosis method of the disclosure may effectively diagnose whether the at least one region of the light-emitting device is abnormal.
    Type: Grant
    Filed: August 31, 2020
    Date of Patent: October 11, 2022
    Assignee: Innolux Corporation
    Inventors: Yu-Ming Huang, Yi-Cheng Chang, Chia-Huan Huang
  • Patent number: 11469672
    Abstract: Disclosed is an interleaved buck-boost converter. The interleaved buck-boost converter includes a master switching stage and a slave switching stage that are controlled by a pulse-width-modulation (PWM) controller.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: October 11, 2022
    Assignee: Silego Technology Inc.
    Inventor: Kevin Yi Cheng Chang
  • Patent number: 11366263
    Abstract: A backlight module includes a circuit board, a light-emitting unit, a light-reflecting plate, a light guide plate, and a light-shielding sheet. The light-emitting unit is disposed on the circuit board. The light-reflecting plate is disposed above the circuit board. The light guide plate is disposed above the light-reflecting plate and includes a single-key light guide area. The single-key light guide area includes an accommodating hole and a light-blocking structure. The accommodating hole runs through the single-key light guide area and accommodates the light-emitting unit. The light-blocking structure and the light-emitting unit are arranged in a direction. The light-shielding sheet is disposed above the light guide plate.
    Type: Grant
    Filed: November 8, 2021
    Date of Patent: June 21, 2022
    Assignee: Chicony Power Technology Co., Ltd.
    Inventors: Hsuan-Wei Ho, Yi-Cheng Chang, Shin Liu
  • Patent number: 11217193
    Abstract: A signal-processing method for a display device, including: receiving a frame signal; and converting the frame signal into a plurality of sub-frame signals in a number of N corresponding to N different sub-frame duties, wherein N is a positive integer equal to or greater than 2. Therefore, the display device using a drive module with lower bits may have a resolution with higher bits to improve the display quality of the electronic device.
    Type: Grant
    Filed: June 18, 2020
    Date of Patent: January 4, 2022
    Assignee: INNOLUX CORPORATION
    Inventors: Kuan-Hsien Huang, Ho-Tien Chen, Yi-Cheng Chang, Hung-Chiao Wu
  • Publication number: 20210399636
    Abstract: A switching power converter is provided with a one-shot bias boosting circuit that responds to a premature trip point to boost the performance of a linear comparator in a pulse width modulator. In a sense-amplifier based implementation of the comparator, a clock-edge generator boosts the performance of the sense amplifier at the premature trip point.
    Type: Application
    Filed: August 31, 2021
    Publication date: December 23, 2021
    Inventors: Kevin Yi Cheng Chang, Kelly Consoer
  • Patent number: 11165344
    Abstract: Disclosed is an interleaved buck-boost converter. The interleaved buck-boost converter comprises a multi-level direct current (DC) to DC converter (MLDC converter), a flying capacitor monitor, and a voltage-level controller. The MLDC converter includes the IMPM and the IMPM includes the flying capacitor. The flying capacitor monitor is in signal communication with the flying capacitor and the voltage-level controller is in signal communication with the flying capacitor monitor. The flying capacitor monitor compares a flying capacitor voltage of the flying capacitor and switches a state of operation of the MLDC converter if the flying capacitor voltage is less than a first flying capacitor reference voltage.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: November 2, 2021
    Assignee: SILEGO TECHNOLGY INC.
    Inventor: Kevin Yi Cheng Chang
  • Patent number: 11144131
    Abstract: An illuminated module includes a light source assembly, a light guide plate, a filter, and a light-shielding sheet. The light source assembly includes a light-emitting component, the light-emitting component being configured to emit light. The light guide plate is on a traveling route of the light, and has a surface and a microstructure. The filter is located on the surface, and has a first area and a second area, the first area and the second area corresponding to the microstructure, where the first area has a first filter characteristic, the second area has a second filter characteristic, and the first filter characteristic is different from the second filter characteristic. The light-shielding sheet is located on the other side of the light guide plate opposite to the filter, and has a transparent opening corresponding to the microstructure. In addition, an illuminated keyboard is provided.
    Type: Grant
    Filed: September 9, 2020
    Date of Patent: October 12, 2021
    Assignee: CHICONY POWER TECHNOLOGY CO., LTD.
    Inventors: Hsuan-Wei Ho, Yi-Cheng Chang