Patents by Inventor Jui-Hua Chang

Jui-Hua 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: 20240045100
    Abstract: A programmable structured light generator, a photoelectric device having same, and a manufacturing method. The structured light generator includes: a laser module, wherein the laser module includes a programmable controller and an individually addressable vertical cavity surface emitting laser array (VCSEL), and the programmable controller is used for controlling light spot position coding of the VCSEL array; a collimation module, disposed at a light source emitter of the VCSEL array, wherein the collimation module is used for collimating emergent light of the VCSEL array; and a metasurface module, disposed on an emitted light focal plane path, wherein the metasurface module is used for projecting a programmable structured light speckle dot matrix pattern in a far field.
    Type: Application
    Filed: October 12, 2023
    Publication date: February 8, 2024
    Inventors: Chenyang Wu, Xuanlun Huang, Yipeng Ji, Jiaxing Wang, Constance Jui-Hua Chang-Hasnain
  • Patent number: 5974912
    Abstract: A door lock unlockable electro-magnetically and with a key consists of an inner plate, a control device, a drive mechanism, a housing, a handle and a locking mechanism. The control device has a control block engaging a post of the inner plate, and the control block has an outer end engageable with the drive mechanism. An IC key card can power the control device to unlock the door lock, and a key can also be used to rotate the locking mechanism for rotating the drive mechanism which moves inward to engage the control block of the control device. Then the handle can be rotated to rotate the shaft of a deadbolt to disengage from a deadbolt hole in a door frame to unlock the door lock for preventing from being unlocked by prying or breaking said lock mechanism illegally.
    Type: Grant
    Filed: November 13, 1998
    Date of Patent: November 2, 1999
    Inventors: Tung-Chi Cheng, Jui-Hua Chang