Patents by Inventor Chun-Sing Lee

Chun-Sing Lee 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: 20130099207
    Abstract: The present invention provides a bipolar compound represented by formula (I) and the derivatives thereof as a host material having excellent bipolar transporting properties for organic light-emitting diodes (OLEDs). The present invention also relates to a device including at least a layer of the bipolar compound and/or the derivatives thereof as a host material and a method of making the same.
    Type: Application
    Filed: April 19, 2012
    Publication date: April 25, 2013
    Applicant: NANO AND ADVANCED MATERIALS INSTITUTE LIMITED
    Inventors: Chun Sing LEE, Xiao Hong ZHANG, Shuit Tong LEE, Caijun ZHENG, Man Keung FUNG
  • Patent number: 8119254
    Abstract: There are disclosed rare-earth metal containing electron-injecting electrodes which are particularly effective for use with organic LED devices used in electroluminescent structures and which may in particular be formed as transparent electrodes for use in transparent or surface emitting OLEDs.
    Type: Grant
    Filed: September 27, 2005
    Date of Patent: February 21, 2012
    Assignee: City University of Hong Kong
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Shiu-Lun Lai, Mei-Yee Chan
  • Patent number: 8101290
    Abstract: Disclosed herein are several organic compounds having electron-transporting and/or hole-blocking performance and their preparation method and use and the OLEDs comprising the organic compound. The organic compounds exhibit high ionization potential (IP), electron affinity (Ea), glass transition temperature (Tg) and high electron mobility, and are a kind of good electron-transporting material with good hole-blocking ability. The devices comprising these compounds as one of the emitting layer, electron-transporting layer (ETL) and hole-blocking layer (HBL) show improved efficiency and better color purity.
    Type: Grant
    Filed: October 15, 2008
    Date of Patent: January 24, 2012
    Assignee: Technical Institute of Physics and Chemistry of Chinese Academy of Sciences
    Inventors: PengFei Wang, Na Li, Weimin Liu, Shuit-Tong Lee, Chun-Sing Lee
  • Patent number: 8048541
    Abstract: An electroluminescence device has an anode, a cathode and an emitting layer located between the anode and the cathode. The emitting layer contains a compound selected from a group consisting of neutral red and its derivatives.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: November 1, 2011
    Assignee: City University of Hong Kong
    Inventors: Shuit-Tong Lee, Chun Sing Lee, Pengfei Wang, Zhiyuan Xie
  • Publication number: 20100148662
    Abstract: An electroluminescence device has an anode, a cathode and an emitting layer located between the anode and the cathode. The emitting layer contains a compound selected from a group consisting of neutral red and its derivatives.
    Type: Application
    Filed: December 17, 2008
    Publication date: June 17, 2010
    Applicant: CITY UNIVERSITY OF HONG KONG
    Inventors: Shuit-Tong Lee, Chun Sing Lee, Pengfei Wang, Zhiyuan Xie
  • Publication number: 20090102356
    Abstract: Disclosed herein are several organic compounds having electron-transporting and/or hole-blocking performance and their preparation method and use and the OLEDs comprising the organic compound. The organic compounds exhibit high ionization potential (IP), electron affinity (Ea), glass transition temperature (Tg) and high electron mobility, and are a kind of good electron-transporting material with good hole-blocking ability. The devices comprising these compounds as one of the emitting layer, electron-transporting layer (ETL) and hole-blocking layer (HBL) show improved efficiency and better color purity.
    Type: Application
    Filed: October 15, 2008
    Publication date: April 23, 2009
    Applicant: Technical Institute Of Physics And Chemistry Of Chinese Academy Of Sciences
    Inventors: PengFei WANG, Na LI, Weimin LIU, Shuit-Tong LEE, Chun-Sing Lee
  • Publication number: 20090021161
    Abstract: A simple and efficient method of increasing conductivity of the fluorocarbon film is disclosed. By illuminating the fluorocarbon film under ultraviolet light (UV-CFx), the film conductivity can be increased by five orders of magnitude. Devices using such a UV-treated, conductive fluorocarbon film as a buffer layer give much better performance in terms of lower operational voltage and enhanced operational stability. The improved smoothness and lowered hole injection barrier height with UV-CFx are responsible for the enhanced performance of electroluminescent devices.
    Type: Application
    Filed: September 30, 2008
    Publication date: January 22, 2009
    Applicant: City University of Hong Kong
    Inventors: Chun Sing LEE, Shuit-Tong LEE, Shi Wun TONG, Yeshayahu LIFSHITZ
  • Patent number: 7429662
    Abstract: This invention relates to an organic electroluminescence (EL) device and to the use of a tris-cyclometalated iridium complex with a 3-Phenyl-azine ligand for thin-film type organic electroluminescence devices.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: September 30, 2008
    Assignee: City University of Hong Kong
    Inventors: Shuit Tong Lee, Chun Sing Lee, Baoxiu Mi, Peng-Fei Wang
  • Patent number: 7232617
    Abstract: A compound of formula [I]: X—R[I] wherein X represents the group: and R is either (i) represented by the formula [II] wherein n is 1 or 2, and the or each R7 group is independently selected from the group consisting of hydrogen and halogen atoms, cyano, nitro, mercapto, carbonyl and sulfone groups, and optionally substituted alkyl, haloalkyl, hydroxyalkyl, aryl, alkoxy, aryloxy, alkylamino, arylamino, alkylthio, arylthio, ester, siloxy, cyclic hydrocarbon and heterocyclic groups; or (ii) is selected from the group consisting of optionally substituted alkyl, hydroxyalkyl, aryl, cyclic hydrocarbon and heterocyclic groups; wherein in each case R1–R6 are each independently selected from the group consisting of hydrogen and halogen atoms, cyano, nitro, mercapto, carbonyl and sulfone groups, and optionally substituted alkyl, haloalkyl, hydroxyalkyl, aryl, alkoxy, aryloxy, alkylamino, arylamino, alkylthio, arylthio, ester, siloxy, cyclic hydrocarbon and heterocyclic groups.
    Type: Grant
    Filed: February 4, 2003
    Date of Patent: June 19, 2007
    Assignee: Cityu Research Limited
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Peng-Fei Wang, Bao-Xiu Mi
  • Patent number: 7132126
    Abstract: A simple chemical technique has been developed to grow large quantity of carbon nanostructures, including carbon nanotubes, hydrocarbon nanotubes and carbon nanoonions, in the organic solution at ambient (room) temperature and atmospheric pressure using silicon nanostructures (nanowires, nanodots, ribbons, and porous silicon) as starting materials. These CNT and CNO have the lattice d-spacing from 3.4 ? to 5 ?.
    Type: Grant
    Filed: October 17, 2002
    Date of Patent: November 7, 2006
    Assignee: City University of Hong Kong
    Inventors: Shuit-Tong Lee, Chi-Pui Li, Xu-Hui Sun, Ning-Bew Wong, Chun-Sing Lee, Boon-Keng Teo
  • Publication number: 20060186792
    Abstract: There are disclosed rare-earth metal containing electron-injecting electrodes which are particularly effective for use with organic LED devices used in electroluminescent structures and which may in particular be formed as transparent electrodes for use in transparent or surface emitting OLEDs.
    Type: Application
    Filed: September 27, 2005
    Publication date: August 24, 2006
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Shiu-Lun Lai, Mei-Yee Chan
  • Patent number: 7037600
    Abstract: Compounds of formula [I] wherein each R1 to R8 is independently selected from the group consisting of halogen atoms, cyano, isocyano, mercapto, amino, carbonyl, carboxy, sulfone, nitro and hydroxy groups, and optionally substituted alkyl, alkenyl, alkynyl, haloalkyl, hydroxyalkyl, aryl, alkoxy, aryloxy, alkylamino, arylamino, alkylarylamino, amide, alkylthio, arylthio, alkoxy carbonyl, siloxy, cyclic hydrocarbon or heterocyclic groups; each x is independently zero, one, two or three; each y is independently zero or one; and each z is independently zero, one, two or three are useful in organic electroluminescence devices. Such compounds are disclosed herein, as well as organic electroluminescence devices using the compounds in the emissive layer.
    Type: Grant
    Filed: March 18, 2003
    Date of Patent: May 2, 2006
    Assignee: City University of Hong Kong
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Liang-Sun Hung, Baoxiu Mi, Zhi-Qiang Gao
  • Patent number: 6917158
    Abstract: An organic light-emitting diode is described in which the anode comprises midfrequency magnetron sputtered aluminum-doped zinc oxide to increase the device stability and to decrease the material cost. Due the novel deposition technique, ZnO:Al film with ITO-like electrical conductivity can be deposited and improved device performance, especially the long-term stability can be obtained which are attributed to the modification of the ZnO:Al conductivity and surface chemistry.
    Type: Grant
    Filed: March 8, 2002
    Date of Patent: July 12, 2005
    Assignee: City University of Hong Kong
    Inventors: Shuit-Tong Lee, Xin Jiang, Chun-Sing Lee, Fu-Lung Wong
  • Publication number: 20050052118
    Abstract: There are diclosed rare-earth metal containing electron-injecting electrodes which are particularly effective for use with organic LED devices used in electroluminescent structures and which may in particular be formed as transparent electrodes for use in transparent or surface emitting OLEDs.
    Type: Application
    Filed: September 5, 2003
    Publication date: March 10, 2005
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Shiu-Lun Lai, Mei-Yee Chan
  • Patent number: 6861162
    Abstract: An organic electroluminescence device which includes an anode, a cathode, a hole transport layer, an electron transport layer, and at least one organic luminescent medium doped with a pyrazolo[3,4b]quinoxaline derivative is disclosed. The present device provides improved efficiency, and the emission band associated therewith is surprisingly narrow. The improved green emitting organic electroluminescence device exhibits high color purity.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: March 1, 2005
    Assignee: CityU Research Ltd.
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Peng-Fei Wang, Zhi-Yuan Xie
  • Patent number: 6833202
    Abstract: Organic electroluminescence devices are described, each of which comprises an anode, a cathode, a luminescent layer, at least one hole-transporting layer disposed between the anode and the luminescent layer, at least one electron-transporting layer disposed between the cathode and the luminescent layer, and a substrate present on either the anode or cathode. The luminescent layer in the devices uses as red-emitting materials, salicylaldiminato Schiff bases or their metal complexes based on diaminomaleonitrile and salicylaldehyde derivatives. These organic electroluminescence devices exhibit excellent color chromaticity co-ordinates and good efficiency.
    Type: Grant
    Filed: March 13, 2003
    Date of Patent: December 21, 2004
    Assignee: City University of Hong Kong
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Peng-Fei Wang, Zhi-Yuan Xie
  • Publication number: 20040185298
    Abstract: The invention provides a compound of formula [I] 1
    Type: Application
    Filed: March 18, 2003
    Publication date: September 23, 2004
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Liang-Sun Hung, Baoxiu Mi, Zhi-Qiang Gao
  • Publication number: 20040180234
    Abstract: Organic electroluminescence devices are described, each of which comprises an anode, a cathode, a luminescent layer, at least one hole-transporting layer disposed between the anode and the luminescent layer, at least one electron-transporting layer disposed between the cathode and the luminescent layer, and a substrate present on either the anode or cathode. The luminescent layer in the devices uses as red-emitting materials, salicylaldiminato Schiff bases or their metal complexes based on diaminomaleonitrile and salicylaldehyde derivatives. These organic electroluminescence devices exhibit excellent color chromaticity co-ordinates and good efficiency.
    Type: Application
    Filed: March 13, 2003
    Publication date: September 16, 2004
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Peng-Fei Wang, Zhi-Yuan Xie
  • Publication number: 20040151943
    Abstract: A compound of formula [I]:
    Type: Application
    Filed: February 4, 2003
    Publication date: August 5, 2004
    Inventors: Shuit-Tong Lee, Chun-Sing Lee, Peng-Fei Wang, Bao-Xiu Mi
  • Patent number: 6761803
    Abstract: A method and an apparatus have been developed to fabricate large area uniform silicon cone arrays using different kinds of ion-beam sputtering methods. The apparatus includes silicon substrate as the silicon source, and metal foils are used as catalyst. Methods of surface modification of the as-synthesized silicon cones for field emission application have also been developed, including hydrofluoric acid etching, annealing and low work-function metal coating. Nano-structure modification based on silicon cones takes advantage of the fact that the cone tip consists of metal/metal siliside, which can be used as catalyst and template for nanowires growth. A method and an apparatus have been developed to grow silicon oxide/silicon nanowires on tips of the silicon cones.
    Type: Grant
    Filed: December 17, 2001
    Date of Patent: July 13, 2004
    Assignee: City University of Hong Kong
    Inventors: Shuit-Tong Lee, Igor Bello, Chun-Sing Lee, Quan Li, Naigui Shang