Patents by Inventor Chia-Chun Chang

Chia-Chun 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).

  • Patent number: 11127700
    Abstract: An integrated circuit device includes a substrate and an integrated circuit area on the substrate. The integrated circuit area includes a dielectric stack. A cap layer is disposed on the dielectric stack. A seal ring is disposed in the dielectric stack and around a periphery of the integrated circuit area. A trench is formed around the seal ring to expose a sidewall of the dielectric stack. A MIM capacitor including a CTM layer and a CBM layer is disposed on the dielectric stack. A moisture blocking layer continuously covers the integrated circuit area and the MIM capacitor. The cap layer is interposed between the CTM layer and the CBM layer of the MIM capacitor and functions as a capacitor dielectric layer of the MIM capacitor. The moisture blocking layer extends to the sidewall of the dielectric stack, thereby sealing a boundary between two adjacent dielectric films in the dielectric stack.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: September 21, 2021
    Assignee: UNITED MICROELECTRONICS CORP.
    Inventors: Purakh Raj Verma, Kuo-Yuh Yang, Chia-Huei Lin, Chu-Chun Chang
  • Patent number: 11108393
    Abstract: An optical keyswitch includes a keycap, a supporting mechanism having a protrusion disposed under the keycap to support the keycap to move downward or upward, and a switch module including a circuit board, an emitter, and a receiver. The emitter and the receiver are electrically connected to the circuit board. The emitter emits an optical signal to the receiver. When the keycap is not pressed, the receiver receives the optical signal of a first intensity. When the keycap is pressed, the protrusion moves along with the keycap, and the protrusion changes the optical signal received by the receiver to have a second intensity different from the first intensity, so the switch module is triggered to generate a triggering signal.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: August 31, 2021
    Assignee: DARFON ELECTRONICS CORP.
    Inventors: Chen Yang, Yu-Chun Hsieh, Yung-Chih Wang, Chia-Hung Liu, Ching-Yu Wang, Li-Te Chang
  • Publication number: 20210257910
    Abstract: Devices and methods are provided for controlling dead-time of a direct current to direct current (DC-DC) converter. A control circuit includes a first transistor having a source/drain terminal coupled to an output voltage of the DC-DC converter configured to provide current based on the output voltage. The control circuit also includes a digital up/down counter having an output terminal electrically coupled to an input terminal of a delay cell of the DC-DC converter. A current sensing circuit of the control circuit is electrically coupled to an input terminal of the digital up/down counter configured to receive the current and drive the digital up/down counter based on the current.
    Type: Application
    Filed: April 7, 2021
    Publication date: August 19, 2021
    Inventors: Chia-Chun Chang, Alan Roth, Eric Soenen, Tysh-Bin Liu
  • Patent number: 10998817
    Abstract: Devices and methods are provided for controlling dead-time of a direct current to direct current (DC-DC) converter. A control circuit includes a first transistor having a source/drain terminal coupled to an output voltage of the DC-DC converter configured to provide current based on the output voltage. The control circuit also includes a digital up/down counter having an output terminal electrically coupled to an input terminal of a delay cell of the DC-DC converter. A current sensing circuit of the control circuit is electrically coupled to an input terminal of the digital up/down counter configured to receive the current and drive the digital up/down counter based on the current.
    Type: Grant
    Filed: January 3, 2018
    Date of Patent: May 4, 2021
    Assignee: Taiwan Semiconductor Manufacturing Company Limited
    Inventors: Chia-Chun Chang, Alan Roth, Eric Soenen, Tysh-Bin Liu
  • Publication number: 20200412251
    Abstract: A DC-DC converter and a DC-DC converter operation method are provided. The DC-DC converter includes a power stage, an error amplifier, a pulse width modulation (PWM) generator, and a gate controller. The power stage includes a first transistor and a second transistor. The power stage is configured to generate an output at a first node. The error amplifier is configured to receive the output from the first node and generates an error signal. The PWM generator is configured to receive the error signal from the error amplifier and generates a pulse width modulation signal. The gate controller includes a plurality of voltage dividers and a comparator. The voltage dividers are configured to perform a voltage division on the first node and a second node to generate a first voltage and a second voltage. The first node is an output node of the DC-DC converter and the second node is a node between the first transistor and the second transistor of the DC-DC converter.
    Type: Application
    Filed: March 2, 2020
    Publication date: December 31, 2020
    Applicant: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Chia-Chun Chang, Alan Roth, Eric Soenen, Ying-Chih Hsu
  • Patent number: 10649276
    Abstract: A backlight module and a display device are provided. The display device includes a display panel and a backlight module. The backlight module includes a back plate, a spacer element, and an optical element. The spacer element passes through the back plate and includes a base portion, a supporting portion, a positioning portion and a first protruding portion. The base portion has a first surface and a second surface. The supporting portion is disposed on the first surface. The positioning portion is disposed on the second surface. The first protruding portion is disposed on the second surface and is located around the positioning portion. The first protruding portion has a third surface away from and parallel to the second surface. The optical element is disposed on the spacer element. A part of the back plate is located between the base portion and a part of the positioning portion.
    Type: Grant
    Filed: October 16, 2018
    Date of Patent: May 12, 2020
    Assignee: INNOLUX CORPORATION
    Inventors: Chia-Chun Chang, Jen-Hsiang Yen
  • Publication number: 20190155102
    Abstract: A backlight module and a display device are provided. The display device includes a display panel and a backlight module. The backlight module includes a back plate, a spacer element, and an optical element. The spacer element passes through the back plate and includes a base portion, a supporting portion, a positioning portion and a first protruding portion. The base portion has a first surface and a second surface. The supporting portion is disposed on the first surface. The positioning portion is disposed on the second surface. The first protruding portion is disposed on the second surface and is located around the positioning portion. The first protruding portion has a third surface away from and parallel to the second surface. The optical element is disposed on the spacer element. A part of the back plate is located between the base portion and a part of the positioning portion.
    Type: Application
    Filed: October 16, 2018
    Publication date: May 23, 2019
    Inventors: Chia-Chun CHANG, Jen-Hsiang YEN
  • Publication number: 20190103812
    Abstract: Devices and methods are provided for controlling dead-time of a direct current to direct current (DC-DC) converter. A control circuit includes a first transistor having a source/drain terminal coupled to an output voltage of the DC-DC converter configured to provide current based on the output voltage. The control circuit also includes a digital up/down counter having an output terminal electrically coupled to an input terminal of a delay cell of the DC-DC converter. A current sensing circuit of the control circuit is electrically coupled to an input terminal of the digital up/down counter configured to receive the current and drive the digital up/down counter based on the current.
    Type: Application
    Filed: January 3, 2018
    Publication date: April 4, 2019
    Inventors: Chia-Chun Chang, Alan Roth, Eric Soenen, Tysh-Bin Liu
  • Patent number: 10186958
    Abstract: A circuit includes a first circuit that operates at a first-circuit supply voltage value and generates at least one of a first reference voltage value or a second reference voltage value, based on a voltage rated for transistors in a second circuit. The second circuit operates at the first-circuit supply voltage value and receives a first signal and at least one of the first reference voltage value or the second reference voltage value. The first signal is configured to swing between a low voltage value and a high voltage value lower than the first-circuit supply voltage value. The second circuit keeps a voltage across two terminals of a first transistor in the second circuit below the voltage rated for the first transistor, based on the at least one of the first reference voltage value or the second voltage value.
    Type: Grant
    Filed: September 20, 2017
    Date of Patent: January 22, 2019
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Alan Roth, Chia-Chun Chang, Eric Soenen
  • Publication number: 20180345466
    Abstract: A tube crimper includes a front crimper including a crimper body and multiple crimper wires arranged in a U shape and defining with the crimper body a U-shaped closed space therebetween, a die block mounted in the U-shaped closed space, and a hydraulic device having a pusher inserted through the crimper body of the front crimper and connected with the die block. After insertion of the tube and connector to be crimped into the U-shaped closed space, the hydraulic device is operated to move the pusher, causing the die block and the crimper wires to crimp the tube onto the connector.
    Type: Application
    Filed: May 27, 2018
    Publication date: December 6, 2018
    Inventor: Chia-Chun CHANG
  • Patent number: 10101527
    Abstract: A display device includes a display panel and a light transmission layer disposed on the display panel. The display panel has an active area having a first side and a second side opposite to the first side and outputting a main image, and an auxiliary area located outside of and distributed along the first side and outputting an auxiliary image. The light transmission layer has a bottom surface facing the active area and receiving the main image. A light entrance surface and a reflective surface are located at sides of the bottom surface corresponding to the first side for receiving the auxiliary image and to the second side while inclining outward away from the bottom surface, respectively. After entering the light entrance surface, the auxiliary image is transmitted to the reflective surface and reflected outside one side of the main image corresponding to the second side via the reflective surface.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 16, 2018
    Assignee: AU OPTRONICS CORPORATION
    Inventors: Tzu-Chin Huang, Chia-Chun Chang
  • Publication number: 20180013343
    Abstract: A circuit includes a first circuit that operates at a first-circuit supply voltage value and generates at least one of a first reference voltage value or a second reference voltage value, based on a voltage rated for transistors in a second circuit. The second circuit operates at the first-circuit supply voltage value and receives a first signal and at least one of the first reference voltage value or the second reference voltage value. The first signal is configured to swing between a low voltage value and a high voltage value lower than the first-circuit supply voltage value. The second circuit keeps a voltage across two terminals of a first transistor in the second circuit below the voltage rated for the first transistor, based on the at least one of the first reference voltage value or the second voltage value.
    Type: Application
    Filed: September 20, 2017
    Publication date: January 11, 2018
    Inventors: Alan ROTH, Chia-Chun CHANG, Eric SOENEN
  • Publication number: 20170307817
    Abstract: A display device includes a display panel and a light transmission layer disposed on the display panel. The display panel has an active area having a first side and a second side opposite to the first side and outputting a main image, and an auxiliary area located outside of and distributed along the first side and outputting an auxiliary image. The light transmission layer has a bottom surface facing the active area and receiving the main image. A light entrance surface and a reflective surface are located at sides of the bottom surface corresponding to the first side for receiving the auxiliary image and to the second side while inclining outward away from the bottom surface, respectively. After entering the light entrance surface, the auxiliary image is transmitted to the reflective surface and reflected outside one side of the main image corresponding to the second side via the reflective surface.
    Type: Application
    Filed: January 26, 2017
    Publication date: October 26, 2017
    Inventors: Tzu-Chin HUANG, Chia-Chun CHANG
  • Patent number: 9780647
    Abstract: A circuit comprises a first circuit and a second circuit. The first circuit is configured to operate at a first-circuit supply voltage value, and to generate a first reference voltage value based on a voltage rated for transistors in a second circuit. The second circuit is configured to operate at a second-circuit supply voltage value, to receive a first signal and the first reference voltage value, and to clamp an input node of the second circuit based on the first reference voltage value. The second-circuit supply voltage value is less than the first-circuit supply voltage value. The first signal is configured to swing between a low voltage value and a voltage value higher than the second-circuit supply voltage value.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: October 3, 2017
    Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.
    Inventors: Alan Roth, Chia-Chun Chang, Eric Soenen
  • Publication number: 20170116644
    Abstract: A computer-implemented method for providing advertisements in an augmented reality environment to a user includes receiving data related to a marker, the marker placed amongst one or more physical objects captured by the video camera. The computer-implemented method also includes retrieving dynamic digital content associated with the marker. Further, the computer-implemented method includes displaying the dynamic digital content amongst the one or more physical objects. Furthermore, the computer-implemented method includes receiving a user interaction with the dynamic digital content. Moreover, the computer-implemented method includes performing an action based on the user interaction.
    Type: Application
    Filed: January 3, 2017
    Publication date: April 27, 2017
    Applicant: EXCALIBUR IP, LLC
    Inventors: Wyatt Ling-Wei Huang, Balduran Chia-Chun Chang, Connie Shih-Ting Huang
  • Patent number: 9630236
    Abstract: A pipe positioning device for pipe expander includes a mold positioning device defining therein a locating space, an axle located at an outer side of the mold positioning device, and a stop member including a barrel pivotally coupled to and movable along the axle, an extension arm extended from the barrel and a stop plate located at the distal end of the extension arm and turnable about the axle into the locating space to abut at a front end of a mold in the locating space for stopping against a pipe in the mold for expanding, facilitating quick pipe expanding.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: April 25, 2017
    Assignee: SUN-WONDER INDUSTRIAL CO., LTD
    Inventor: Chia-Chun Chang
  • Publication number: 20170001270
    Abstract: A pipe crimping tool includes a positioning unit including a positioning base defining therein a positioning space and having a connection portion and a first side arm amd a second side arm respectively extended from two opposite ends of the connection portion in parallel and respectively terminating in a first stopper and a second stopper, two position-limit members respectively disposed at the first side arm and the second side arm at a bottom side, a connection unit pivotally connected to the first stopper and lockable to the second stopper to close the passage of the positioning space, and a hydraulic cylinder connected to the positioning base to hold a pressure block in the positioning space and operable to move the pressure block in achieving a crimping operation.
    Type: Application
    Filed: August 9, 2015
    Publication date: January 5, 2017
    Inventor: Chia-Chun CHANG
  • Patent number: 9536251
    Abstract: A computer-implemented method for providing advertisements in an augmented reality environment to a user includes receiving data related to a marker, the marker placed amongst one or more physical objects captured by the video camera. The computer-implemented method also includes retrieving dynamic digital content associated with the marker. Further, the computer-implemented method includes displaying the dynamic digital content amongst the one or more physical objects. Furthermore, the computer-implemented method includes receiving a user interaction with the dynamic digital content. Moreover, the computer-implemented method includes performing an action based on the user interaction.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: January 3, 2017
    Assignee: Excalibur IP, LLC
    Inventors: Wyatt (Ling-Wei) Huang, Balduran (Chia-Chun) Chang, Connie (Shih-Ting) Huang
  • Patent number: 9490457
    Abstract: A display device includes a rear bezel, a display panel and at least two heat dissipation sheets. The display panel is disposed on the rear bezel. The display panel includes at least one power line having an extension direction. The heat dissipation sheets are disposed between the rear bezel and the display panel. The heat dissipation sheets have at least one seam formed therebetween. The at least one seam is substantially parallel to the extension direction of the at least one power line.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: November 8, 2016
    Assignee: AU OPTRONICS CORP.
    Inventors: Yu-Chun Huang, Chia-Chun Chang, Hong-Shen Lin
  • Patent number: 9398093
    Abstract: A control method of a storage apparatus including a control module and a storage element is provided. In the method, the control module provides a first and a second data transmission interface and a control interface, in which the control module respectively establishes data connections with a first and a second electronic device. Then, the control module transmits a first data between the first electronic device and the storage element via the first data transmission interface. In transmitting the first data between the first electronic device and the storage element via the first data transmission interface by the control module, when receiving a transmission request for a second data in the storage element from the second data transmission interface, the control module provides the second data transmission interface for transmitting the second data after the transmission of the first data has been completed.
    Type: Grant
    Filed: July 5, 2013
    Date of Patent: July 19, 2016
    Assignee: COMPAL ELECTRONICS, INC.
    Inventors: Chung-Jen Yang, Yung-Chih Tsao, Shin-Che Feng, Chang-Ching Hung, Chia-Chun Chang