Patents by Inventor Zhaohui zy Yang

Zhaohui zy Yang 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).

  • Pixelated LED
    Patent number: 9196653
    Abstract: A pixelated light emitting diode (LED) and a method for pixelating an LED are described. The pixelated LED includes two or more monolithically integrated electroluminescent elements disposed adjacent each other on a substrate, wherein at least a portion of each electroluminescent element immediately adjacent the substrate includes an inverted truncated pyramidal shape. The method for pixelating an LED includes selectively removing material from the major surface of an LED to a depth below the emissive region, thereby forming an array of inverted truncated pyramid shapes. The efficiency of the pixelated LEDs can be improved by incorporating the truncated pyramidal shape. Additionally, the crosstalk between adjacent LED pixels can be reduced by incorporating the truncated pyramidal shape.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: November 24, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Catherine A. Leatherdale, Zhaohui Zy Yang
  • PIXELATED LED
    Publication number: 20120119237
    Abstract: A pixelated light emitting diode (LED) and a method for pixelating an LED are described. The pixelated LED includes two or more monolithically integrated electroluminescent elements disposed adjacent each other on a substrate, wherein at least a portion of each electroluminescent element immediately adjacent the substrate includes an inverted truncated pyramidal shape. The method for pixelating an LED includes selectively removing material from the major surface of an LED to a depth below the emissive region, thereby forming an array of inverted truncated pyramid shapes. The efficiency of the pixelated LEDs can be improved by incorporating the truncated pyramidal shape. Additionally, the crosstalk between adjacent LED pixels can be reduced by incorporating the truncated pyramidal shape.
    Type: Application
    Filed: July 27, 2010
    Publication date: May 17, 2012
    Applicant: 3M Innovative Properties Company
    Inventors: Catherine A. Leatherdale, Zhaohui zy Yang