Patents by Inventor Zhaojun Liu

Zhaojun Liu 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: 9041025
    Abstract: A high-resolution, Active Matrix (AM) programmed monolithic Light Emitting Diode (LED) micro-array is fabricated using flip-chip technology. The fabrication process includes fabrications of an LED micro-array and an AM panel, and combining the resulting LED micro-array and AM panel using the flip-chip technology. The LED micro-array is grown and fabricated on a sapphire substrate and the AM panel can be fabricated using PMOS process, NMOS process, or CMOS process. LED pixels in a same row share a common N-bus line that is connected to the ground of AM panel while p-electrodes of the LED pixels are electrically separated such that each p-electrode is independently connected to an output of drive circuits mounted on the AM panel. The LED micro-array is flip-chip bonded to the AM panel so that the AM panel controls the LED pixels individually and the LED pixels exhibit excellent emission uniformity.
    Type: Grant
    Filed: December 5, 2013
    Date of Patent: May 26, 2015
    Assignee: NANO AND ADVANCED MATERIALS INSTITUTE LIMITED
    Inventors: Kei May Lau, Zhaojun Liu
  • Publication number: 20150138786
    Abstract: A lighting structure for holding light-emitting-diodes (“LEDs”) of an LED light bulb, wherein said lighting structure is in a grid form with a plurality of openings therein and having one or more locations for interconnecting LED lighting components disposed on said lighting structure, wherein the grid having a number of pre-selected intersections forming the grid, and wherein a number of pre-selected intersections is in proportion with the amount of desired ventilation and the number of LEDs generating the pre-determined amount of light. The lighting structure can be made from printed-circuit-board material and the openings of the grid can be in one of the following shapes: square, rectangular, circular, and oval.
    Type: Application
    Filed: January 26, 2015
    Publication date: May 21, 2015
    Inventors: James Wang, Kei May Lau, Parco Wong, Wei Xiong Liao, Terence Cho, Zhaojun Liu, Eddie Chong
  • Publication number: 20140177279
    Abstract: Structures for LED light bulbs comprise a driver board and a lighting structure having one or more LEDs disposed thereon. The driver board, in a Y shape, can be the circuit board and has a positive terminal and a negative terminal for receiving electrical power. The Y-shaped driver board having two prongs connects to the light structure to power the LEDs thereon. The lighting structure can be in the form of a grid having the LEDs disposed thereon.
    Type: Application
    Filed: August 19, 2013
    Publication date: June 26, 2014
    Applicant: CLEDOS green tech Limited
    Inventors: James Wang, Kei May Lau, Parco Wang, Wei Xiong Liao, Terence Cho, Zhaojun Liu, Eddie Chong
  • Publication number: 20140091993
    Abstract: A high-resolution, Active Matrix (AM) programmed monolithic Light Emitting Diode (LED) micro-array is fabricated using flip-chip technology. The fabrication process includes fabrications of an LED micro-array and an AM panel, and combining the resulting LED micro-array and AM panel using the flip-chip technology. The LED micro-array is grown and fabricated on a sapphire substrate and the AM panel can be fabricated using PMOS process, NMOS process, or CMOS process. LED pixels in a same row share a common N-bus line that is connected to the ground of AM panel while p-electrodes of the LED pixels are electrically separated such that each p-electrode is independently connected to an output of drive circuits mounted on the AM panel. The LED micro-array is flip-chip bonded to the AM panel so that the AM panel controls the LED pixels individually and the LED pixels exhibit excellent emission uniformity.
    Type: Application
    Filed: December 5, 2013
    Publication date: April 3, 2014
    Applicant: NANO AND ADVANCED MATERIALS INSTITUTE LIMITED
    Inventors: Kei May LAU, Zhaojun LIU
  • Patent number: 8642363
    Abstract: A high-resolution, Active Matrix (AM) programmed monolithic Light Emitting Diode (LED) micro-array is fabricated using flip-chip technology. The fabrication process includes fabrications of an LED micro-array and an AM panel, and combining the resulting LED micro-array and AM panel using the flip-chip technology. The LED micro-array is grown and fabricated on a sapphire substrate and the AM panel can be fabricated using PMOS process, NMOS process, or CMOS process. LED pixels in a same row share a common N-bus line that is connected to the ground of AM panel while p-electrodes of the LED pixels are electrically separated such that each p-electrode is independently connected to an output of drive circuits mounted on the AM panel. The LED micro-array is flip-chip bonded to the AM panel so that the AM panel controls the LED pixels individually and the LED pixels exhibit excellent emission uniformity.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: February 4, 2014
    Assignee: Nano and Advanced Materials Institute Limited
    Inventors: Kei May Lau, Zhaojun Liu
  • Publication number: 20140008667
    Abstract: A high-resolution, Active Matrix (AM) programmed monolithic Light Emitting Diode (LED) micro-array is fabricated using flip-chip technology. The fabrication process includes fabrications of an LED micro-array and an AM panel, and combining the resulting LED micro-array and AM panel using the flip-chip technology. The LED micro-array is grown and fabricated on a sapphire substrate and the AM panel can be fabricated using CMOS process. LED pixels in a same row share a common N-bus line that is connected to the ground of AM panel while p-electrodes of the LED pixels are electrically separated such that each p-electrode is independently connected to an output of drive circuits mounted on the AM panel. The LED micro-array is flip-chip bonded to the AM panel so that the AM panel controls the LED pixels individually and the LED pixels exhibit excellent emission uniformity. According to this constitution, incompatibility between the LED process and the CMOS process can be eliminated.
    Type: Application
    Filed: September 10, 2013
    Publication date: January 9, 2014
    Applicant: NANO AND ADVANCED MATERIALS INSTITUTE LIMITED
    Inventors: Kei May LAU, Chi Wing KEUNG, Zhaojun LIU
  • Patent number: 8557616
    Abstract: A high-resolution, Active Matrix (AM) programmed monolithic Light Emitting Diode (LED) micro-array is fabricated using flip-chip technology. The fabrication process includes fabrications of an LED micro-array and an AM panel, and combining the resulting LED micro-array and AM panel using the flip-chip technology. The LED micro-array is grown and fabricated on a sapphire substrate and the AM panel can be fabricated using CMOS process. LED pixels in a same row share a common N-bus line that is connected to the ground of AM panel while p-electrodes of the LED pixels are electrically separated such that each p-electrode is independently connected to an output of drive circuits mounted on the AM panel. The LED micro-array is flip-chip bonded to the AM panel so that the AM panel controls the LED pixels individually and the LED pixels exhibit excellent emission uniformity. According to this constitution, incompatibility between the LED process and the CMOS process can be eliminated.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: October 15, 2013
    Assignee: Nano and Advanced Materials Institute Limited
    Inventors: Kei May Lau, Chi Wing Keung, Zhaojun Liu
  • Publication number: 20120223875
    Abstract: A high-resolution, Active Matrix (AM) programmed monolithic Light Emitting Diode (LED) micro-array is fabricated using flip-chip technology. The fabrication process includes fabrications of an LED micro-array and an AM panel, and combining the resulting LED micro-array and AM panel using the flip-chip technology. The LED micro-array is grown and fabricated on a sapphire substrate and the AM panel can be fabricated using PMOS process, NMOS process, or CMOS process. LED pixels in a same row share a common N-bus line that is connected to the ground of AM panel while p-electrodes of the LED pixels are electrically separated such that each p-electrode is independently connected to an output of drive circuits mounted on the AM panel. The LED micro-array is flip-chip bonded to the AM panel so that the AM panel controls the LED pixels individually and the LED pixels exhibit excellent emission uniformity.
    Type: Application
    Filed: May 8, 2012
    Publication date: September 6, 2012
    Applicant: NANO AND ADVANCED MATERIALS INSTITUTE LIMITED
    Inventors: Kei May LAU, Zhaojun LIU
  • Publication number: 20110309378
    Abstract: A high-resolution, Active Matrix (AM) programmed monolithic Light Emitting Diode (LED) micro-array is fabricated using flip-chip technology. The fabrication process includes fabrications of an LED micro-array and an AM panel, and combining the resulting LED micro-array and AM panel using the flip-chip technology. The LED micro-array is grown and fabricated on a sapphire substrate and the AM panel can be fabricated using CMOS process. LED pixels in a same row share a common N-bus line that is connected to the ground of AM panel while p-electrodes of the LED pixels are electrically separated such that each p-electrode is independently connected to an output of drive circuits mounted on the AM panel. The LED micro-array is flip-chip bonded to the AM panel so that the AM panel controls the LED pixels individually and the LED pixels exhibit excellent emission uniformity. According to this constitution, incompatibility between the LED process and the CMOS process can be eliminated.
    Type: Application
    Filed: June 1, 2010
    Publication date: December 22, 2011
    Applicant: Nano and Advanced Materials Institute Limited
    Inventors: Kei May Lau, Chi Wing Keung, Zhaojun Liu