Patents by Inventor HAO-JHEN CHANG

HAO-JHEN 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: 20180093365
    Abstract: A vacuum device includes a negative pressure pump and a vacuum-switching device. The vacuum-switching device includes a cylinder, a piston and a piston-driving device. The cylinder has a first hole row, which includes a plurality of first vacuum suction holes. The cylinder has two through holes at two opposite ends, wherein either one of the two through holes is connected with a negative pressure pump. The piston is slidably connected within a hollow chamber inside the cylinder. The piston-driving device enables the piston to be slid back and forth so as to define two different-pressured chambers, thereby switching the first vacuum suction holes progressively to a different pressure.
    Type: Application
    Filed: November 10, 2016
    Publication date: April 5, 2018
    Inventors: Hao-Jhen CHANG, Chia-Chu HUANG, Chih-Chin WEN, Shi-Wei LIN, Cheng-Chang CHIU
  • Patent number: 9749621
    Abstract: A calibration plate and a method for calibrating image capturing devices are provided. The calibration plate includes: a plate having a front face and a rear face; a plurality of calibration patterns formed at the front face of the plate, arranged in a regular manner, and used to calibrate image distortions, lens aberrations, and image center positions for the image capturing devices; and a plurality of graphically encoded patterns formed at the front face of the plate, the graphically encoded patterns being different from each other, and the graphically encoded patterns having information providing the positions of the calibration patterns.
    Type: Grant
    Filed: December 3, 2013
    Date of Patent: August 29, 2017
    Assignee: METAL INDUSTRIES RESEARCH & DEVELOPMENT CENTRE
    Inventors: Shi-Wei Lin, Chih-Chin Wen, Kuo-Kai Hung, Chia-Chu Huang, Hao-Jhen Chang
  • Publication number: 20140184815
    Abstract: A calibration plate and a method for calibrating image capturing devices are provided. The calibration plate includes: a plate having a front face and a rear face; a plurality of calibration patterns formed at the front face of the plate, arranged in a regular manner, and used to calibrate image distortions, lens aberrations, and image center positions for the image capturing devices; and a plurality of graphically encoded patterns formed at the front face of the plate, the graphically encoded patterns being different from each other, and the graphically encoded patterns having information providing the positions of the calibration patterns.
    Type: Application
    Filed: December 3, 2013
    Publication date: July 3, 2014
    Applicant: METAL INDUSTRIES RESEARCH&DEVELOPMENT CENTRE
    Inventors: SHI-WEI LIN, CHIH-CHIN WEN, KUO-KAI HUNG, CHIA-CHU HUANG, HAO-JHEN CHANG