Patents by Inventor Chung-An Tang

Chung-An Tang 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: 10121048
    Abstract: A fingerprint sensing system has a fingerprint sensing device and a power supply circuit. The fingerprint sensing device has a high-voltage input terminal and a low-voltage input terminal. During scan phases of the fingerprint sensing device, the power supply circuit provides a first voltage to the high voltage input terminal and provides a second voltage to the low voltage input terminal. During the read phases of the fingerprint sensing device, the power supply circuit provides a third voltage to the high voltage input terminal and provides a fourth voltage to the low voltage input terminal. A first voltage difference is between the first voltage and the second voltage. A second voltage difference is between the third voltage and the fourth voltage. The first voltage difference is greater than the second voltage difference.
    Type: Grant
    Filed: January 4, 2017
    Date of Patent: November 6, 2018
    Assignee: ELAN MICROELECTRONICS CORPORATION
    Inventors: Chao-Chi Yang, Jui-Che Lin, Tung-An Yao, Chung-Han Cheng, Chung-An Tang
  • Patent number: 9984275
    Abstract: A fingerprint sensor having electrostatic discharge (ESD) protection includes a first ESD protection electrode and a second ESD protection electrode. The first ESD protection electrode is connected to an ESD protection circuit for providing an ESD path, where the first ESD protection electrode and a fingerprint sensor electrode array are formed in a same layer of the fingerprint sensor. The second ESD electrode is connected to the first ESD electrode via multiple conductive via.
    Type: Grant
    Filed: September 18, 2016
    Date of Patent: May 29, 2018
    Assignee: ELAN MICROELECTRONICS CORPORATION
    Inventors: Tsung-Yin Chiang, Chun-Chi Wang, Chung-An Tang
  • Publication number: 20180032779
    Abstract: A fingerprint sensing system has a fingerprint sensing device and a power supply circuit. The fingerprint sensing device has a high-voltage input terminal and a low-voltage input terminal. During scan phases of the fingerprint sensing device, the power supply circuit provides a first voltage to the high voltage input terminal and provides a second voltage to the low voltage input terminal. During the read phases of the fingerprint sensing device, the power supply circuit provides a third voltage to the high voltage input terminal and provides a fourth voltage to the low voltage input terminal. A first voltage difference is between the first voltage and the second voltage. A second voltage difference is between the third voltage and the fourth voltage. The first voltage difference is greater than the second voltage difference.
    Type: Application
    Filed: January 4, 2017
    Publication date: February 1, 2018
    Applicant: ELAN MICROELECTRONICS CORPORATION
    Inventors: Chao-Chi YANG, Jui-Che LIN, Tung-An YAO, Chung-Han CHENG, Chung-An TANG
  • Publication number: 20170286744
    Abstract: A fingerprint sensor having electrostatic discharge (ESD) protection includes a first ESD protection electrode and a second ESD protection electrode. The first ESD protection electrode is connected to an ESD protection circuit for providing an ESD path, where the first ESD protection electrode and a fingerprint sensor electrode array are formed in a same layer of the fingerprint sensor. The second ESD electrode is connected to the first ESD electrode via multiple conductive via.
    Type: Application
    Filed: September 18, 2016
    Publication date: October 5, 2017
    Inventors: Tsung-Yin Chiang, Chun-Chi Wang, Chung-An Tang
  • Publication number: 20160171276
    Abstract: A fingerprint sensor having ESD protection structure and has a substrate having an upper surface. Multiple sensing electrode plates, an ESD protection electrode part connected to ground, a dielectric layer and a protection layer are formed on the upper surface in bottom-up sequence. The ESD protection layer has a first conductive layer and a second conductive layer. The first conductive layer is formed on the upper surface and coplanar with the sensing electrode plates. The second conductive layer is formed on the dielectric layer and has multiple separated conductive elements. Each of conductive elements overlaps the first conductive layer along a vertical axis and connected to the first conductive layer via multiple vias formed in the dielectric layer. When the first conductive layer and/or the second conductive layer are/is coupled to ground, both of the first and second conductive layers are established a discharging path of static electricity.
    Type: Application
    Filed: November 12, 2015
    Publication date: June 16, 2016
    Applicant: ELAN MICROELECTRONICS CORPORATION
    Inventors: Tsung-Yin Chiang, Chun-Chi Wang, Chung-An Tang
  • Patent number: 7643014
    Abstract: A voltage is generated after a touch screen is touched, and the voltage is transformed into a digital signal for detecting a touch point which the touch screen is touched. A touch sensing system includes a first switch having a first node coupled to a first voltage source, a second switch having a node coupled to a second voltage source, a first resistor coupled between the first switch and the second switch in a series connection, a comparator having a first input node coupled to a second node of the first switch, a successive approximation register (SAR) having an input node coupled to an output node of the comparator, and a simulation circuit. An output voltage of the simulation circuit is continuously adjusted by the comparator and the simulation circuit to transform the voltage generated on the touch screen into a digital signal.
    Type: Grant
    Filed: March 2, 2006
    Date of Patent: January 5, 2010
    Assignee: Elan Microelectronics Corporation
    Inventors: Chao-Chi Yang, Chung-An Tang
  • Publication number: 20070089914
    Abstract: A voltage is generated after a touch screen is touched, and the voltage is transformed into a digital signal for detecting a touch point which the touch screen is touched. A touch sensing system includes a first switch having a first node coupled to a first voltage source, a second switch having a node coupled to a second voltage source, a first resistor coupled between the first switch and the second switch in a series connection, a comparator having a first input node coupled to a second node of the first switch, a successive approximation register (SAR) having an input node coupled to an output node of the comparator, and a simulation circuit. An output voltage of the simulation circuit is continuously adjusted by the comparator and the simulation circuit to transform the voltage generated on the touch screen into a digital signal.
    Type: Application
    Filed: March 2, 2006
    Publication date: April 26, 2007
    Inventors: Chao-Chi Yang, Chung-An Tang
  • Patent number: 7158070
    Abstract: While transforming an analog input voltage into a digital signal including several bits, an analog-to-digital converter including a built-in self test (BIST) circuit is used for performing the transformation and compensating an offset error of the analog input voltage. The operations of the digital-to-analog converter include a self test mode and a normal mode. And each of the self test mode and the normal mode includes a sampling phase and a bit cycling phase.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: January 2, 2007
    Assignee: Elan Microelectronics Corporation
    Inventors: Chao-Chi Yang, Chung-An Tang