Patents by Inventor Lian Duan

Lian Duan 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: 20160322582
    Abstract: The present invention discloses an organic electroluminescent device and a manufacturing method thereof. The host material of the light-emitting layer of the organic electroluminescent device is material in which the triplet state energy level of the CT excited state is higher than that of the n-? excited state by 0 to 0.3 eV; or the triplet state of the host material of the light-emitting layer is higher than that of the n-? excited state by more than 1.0 eV; in addition, the difference in energy level between the second triplet state of the n-? state and the first singlet state of the CT excited state is ?0.1 to 0.1 eV; and the luminescent dye is a fluorescent dye. With regard to the organic electroluminescent device in the present invention, as new host material in the light-emitting layer is used and the host material has a donor group and an acceptor group, the triplet state in the light-emitting layer may be fully utilized to achieve a 100% light-emitting efficiency in the fluorescent device.
    Type: Application
    Filed: December 16, 2014
    Publication date: November 3, 2016
    Applicants: BEIJING VISIONOX TECHNOLOGY CO., LTD., TSINGHUA UNIVERSITY
    Inventors: Yong QIU, Lian DUAN, Dongdong ZHANG, Guohui ZHANG
  • Patent number: 9471277
    Abstract: Data measured by PS-OCT is corrected in a non-linear manner to enhance the quantitative analysis capability of PS-OCT and permit accurate quantitative diagnosis, including diagnosis of disease stage of lesions, as a useful means for computer diagnosis. Even when retardation per PS-OCT 1 contains error and becomes noise and its distribution is not normal or symmetrical around the true value, measured data is converted using a distribution conversion function obtained by analyzing the characteristics of noise via Monte Carlo simulation to remove the systematic error and estimate the true value otherwise buried in noise and thereby correct the PS-OCT 1 image more clearly.
    Type: Grant
    Filed: April 25, 2012
    Date of Patent: October 18, 2016
    Assignee: UNIVERSITY OF TSUKUBA
    Inventors: Yoshiaki Yasuno, Lian Duan, Masahide Ito
  • Patent number: 9465125
    Abstract: Methods and systems for compensating for source and receiver ghost effects in a reverse time migration (RTM) equation are described. Boundary conditions associated with the RTM acoustic wave equations for the source and recorded wavefields are modified. The resultant modified RTM acoustic wave equations are solved to generate ghost compensated modeled seismic images. In another aspect an imaging condition is also modified and the resultant RTM acoustic wave equations are solved to generate velocity and impedance perturbation images.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: October 11, 2016
    Assignee: CGG SERVICES SA
    Inventors: Yu Zhang, Graham Roberts, Lian Duan
  • Patent number: 9448316
    Abstract: Methods and systems for generating a stable reverse time demigration (RTDM) equation for predicting wave phenomena such as reflections, refractions and multiples are described. A coupling term is added to an RTDM equation and reflectivity associated with the coupling term is replaced with a pseudo-density function derived from a nonlinear equation. The resultant coupled and stabilized RTDM equation is then used to predict the desired wave phenomena based on the applied seismic image.
    Type: Grant
    Filed: April 11, 2013
    Date of Patent: September 20, 2016
    Assignee: CGG SERVICES SA
    Inventors: Yu Zhang, Lian Duan
  • Publication number: 20160146961
    Abstract: An Earth model of a subsurface is created from acquired seismic data by migrating at least one of the incident wavefields and reflected wavefields to generate angle gathers for the seismic data and identifying for the subsurface an elastic Earth model equation for the incident wavefields and the reflected wavefields in the acquired seismic data. The elastic Earth model is a function of reflection angle between the incident wavefields and reflected wavefields and elastic parameters and is fit to the generated angle gathers through perturbation in the elastic parameters. The generated perturbations are used to create the Earth model of the subsurface.
    Type: Application
    Filed: November 20, 2015
    Publication date: May 26, 2016
    Inventors: Andrew RATCLIFFE, Graham ROBERTS, Lian DUAN
  • Publication number: 20160135683
    Abstract: From OCT-measured data, only the image data of the choroidal vascular network present in the layer of the choroidal layer is selectively extracted, thereby accurately obtaining the thickness of the choroidal vessels and thickness of the choroidal vascular network from the image data, to allow for quantitative evaluation of the choroidal vascular network. The optical coherence tomography apparatus has an optical coherence tomography device, and a computer that processes the three-dimensional OCT tomographic images obtained based on the OCT-measured data acquired by the optical coherence tomography device. The computer functions as a means for selectively separating out only the images of the choroidal vessels from the three-dimensional OCT tomographic images to acquire image data of the choroidal vessels, and also as a means for obtaining the data to be used in the quantitative evaluation of the shape of the choroidal vessels based on the image data of the choroidal vessels.
    Type: Application
    Filed: June 10, 2014
    Publication date: May 19, 2016
    Inventors: Yoshiaki YASUNO, Lian DUAN, Masahide ITOH
  • Publication number: 20160043324
    Abstract: The present invention relates to monochromatic organic light emitting devices. The organic light emitting device includes a substrate, an anode, a cathode and an organic electroluminescent medium disposed between the anode and the cathode, wherein the organic electroluminescent medium includes compound monochromatic luminescent layer; and the compound monochromatic luminescent layer includes host A doped with monochromatic dopant and host B doped with monochromatic dopant, wherein the host A is consisted of two kinds of materials with different transporting characteristics, one is hole-transporting material, and the other is electron-transporting material. In addition, the present invention further relates to white organic light emitting devices, wherein the organic electroluminescent medium is consisted of at least one compound monochromatic luminescent layer, which includes host A doped with monochromatic dopant and host B doped with monochromatic dopant.
    Type: Application
    Filed: October 19, 2015
    Publication date: February 11, 2016
    Inventors: Yong QIU, Kongwu WU, Guohui ZHANG, Lian DUAN
  • Patent number: 9196856
    Abstract: The present invention relates to monochromatic organic light emitting devices. The organic light emitting device includes a substrate, an anode, a cathode and an organic electroluminescent medium disposed between the anode and the cathode, wherein the organic electroluminescent medium includes compound monochromatic luminescent layer; and the compound monochromatic luminescent layer includes host A doped with monochromatic dopant and host B doped with monochromatic dopant, wherein the host A is consisted of two kinds of materials with different transporting characteristics, one is hole-transporting material, and the other is electron-transporting material. In addition, the present invention further relates to white organic light emitting devices, wherein the organic electroluminescent medium is consisted of at least one compound monochromatic luminescent layer, which includes host A doped with monochromatic dopant and host B doped with monochromatic dopant.
    Type: Grant
    Filed: December 3, 2008
    Date of Patent: November 24, 2015
    Assignees: KUNSHAN VISIONOX TECHNOLOGY CO., LTD., TSINGHUA UNIVERSITY
    Inventors: Yong Qiu, Kongwu Wu, Guohui Zhang, Lian Duan
  • Publication number: 20140301158
    Abstract: There is a method for generating a final image of a subsurface of the earth. The method includes receiving measured seismic data d of the subsurface; selecting an objective function E that is function of a reflectivity r of the subsurface; and calculating, in a processor, the reflectivity r based on the measured seismic data d, the objective function E, simulated data {tilde over (d)}, a modeling operator M from a reverse time demigration (RTDM) process and an imaging operator MT from a reverse time migration (RTM) process.
    Type: Application
    Filed: November 5, 2013
    Publication date: October 9, 2014
    Applicant: CGG SERVICES SA
    Inventors: Yu ZHANG, Lian DUAN, Yi XIE
  • Publication number: 20140115022
    Abstract: Data measured by PS-OCT is corrected in a non-linear manner to enhance the quantitative analysis capability of PS-OCT and permit accurate quantitative diagnosis, including diagnosis of disease stage of lesions, as a useful means for computer diagnosis. Even when retardation per PS-OCT 1 contains error and becomes noise and its distribution is not normal or symmetrical around the true value, measured data is converted using a distribution conversion function obtained by analyzing the characteristics of noise via Monte Carlo simulation to remove the systematic error and estimate the true value otherwise buried in noise and thereby correct the PS-OCT 1 image more clearly.
    Type: Application
    Filed: April 25, 2012
    Publication date: April 24, 2014
    Applicant: UNIVERSITY OF TSUKUBA
    Inventors: Yoshiaki Yasuno, Lian Duan, Masahide Ito
  • Publication number: 20130279292
    Abstract: Methods and systems for generating a stable reverse time demigration (RTDM) equation for predicting wave phenomena such as reflections, refractions and multiples are described. A coupling term is added to an RTDM equation and reflectivity associated with the coupling term is replaced with a pseudo-density function derived from a nonlinear equation. The resultant coupled and stabilized RTDM equation is then used to predict the desired wave phenomena based on the applied seismic image.
    Type: Application
    Filed: April 11, 2013
    Publication date: October 24, 2013
    Applicant: CGGVERITAS SERVICES SA
    Inventors: Yu ZHANG, Lian DUAN
  • Patent number: 8480448
    Abstract: A donor film for a laser induced thermal imaging method capable of improving the optical efficiency of an emission layer, a light emitting device using the same, and a method of manufacturing the light emitting device are provided. The donor film for a laser induced thermal imaging method includes a base substrate, a light to heat conversion layer (LTHC) provided on the base substrate and having a pattern with a predetermined step difference, and a transfer layer provided on the LTHC. It is possible to improve the optical efficiency of the emission layer by patterning the transfer layer using the LTHC having the pattern with a predetermined step difference.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: July 9, 2013
    Assignee: Samsung Display Co., Ltd.
    Inventors: Nam-Choul Yang, Lian Duan, Mu-Hyun Kim, Seong-Taek Lee
  • Patent number: 8390191
    Abstract: The present invention relates to a method of preparing a Li film, wherein said Li film is fabricated by directly decomposing a compound of Li under a vacuum evaporation condition, and said compound is Li3N. Said Li film is fabricated by decomposing Li3N at an evaporation rate of 0.01-0.25 nm/s and an evaporation temperature of 300-450° C., and said Li film has a thickness of 0.3-5.0 nm. The present invention also relates to an organic light emitting device comprising said Li film as an electron injection layer and a method for the preparation thereof, and an organic light emitting device including an electron injection layer comprising an electron transport material doped with Li obtained by decomposing Li3N under a vacuum evaporation condition, and a method for the preparation thereof.
    Type: Grant
    Filed: November 29, 2011
    Date of Patent: March 5, 2013
    Assignees: Tsinghua University, Beijing Visionox Technology Co., Ltd., Kunshan Visionox Display Co., Ltd.
    Inventors: Yong Qiu, Deqiang Zhang, Yang Li, Guohui Zhang, Kongwu Wu, Lian Duan, Yudi Gao
  • Patent number: 8367221
    Abstract: The present invention provides an organic light emitting device and a fabrication method thereof, comprising a substrate, an anode layer formed on said substrate, an organic function layer formed on said anode layer, and a cathode layer formed on said organic function layer, characterized in that, further comprising a cathode interface modification layer between said organic function layer and said cathode layer, wherein said cathode interface modification layer contains a compound AxByCz, A is an element of Group IA or IIA, B is an element of Group IIIA or VA, C is a hydrogen element, and 1?x?2, y?[0,1], 1?z?4. In the present invention, the cathode interface modification layer is formed after forming a light emitting layer, the cathode interface modification layer contains a compound AxByCz, the electron injection ability at the cathode interface can be improved by adding the cathode interface modification layer, and hence the device performance can be significantly improved.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: February 5, 2013
    Assignees: Tsinghua University, Beijing Visionox Technology Co., Ltd., Kunshan Visionox Display Co., Ltd.
    Inventors: Yong Qiu, Lian Duan, Yang Li, Guohui Zhang
  • Patent number: 8257128
    Abstract: The present invention relates to a method of preparing a Li film, wherein said Li film is fabricated by directly decomposing a compound of Li under a vacuum evaporation condition, and said compound is Li3N. Said Li film is fabricated by decomposing Li3N at an evaporation rate of 0.01-0.25 nm/s and an evaporation temperature of 300-450° C., and said Li film has a thickness of 0.3-5.0 nm. The present invention also relates to an organic light emitting device comprising said Li film as an electron injection layer and a method for the preparation thereof, and an organic light emitting device including an electron injection layer comprising an electron transport material doped with Li obtained by decomposing Li3N under a vacuum evaporation condition, and a method for the preparation thereof.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: September 4, 2012
    Assignees: Tsinghua University, Beijing Visionox Technology, Kunshan Visionox Display Co., Ltd.
    Inventors: Yong Qiu, Deqiang Zhang, Yang Li, Guohui Zhang, Kongwu Wu, Lian Duan, Yudi Gao
  • Publication number: 20120138908
    Abstract: The present invention relates to a method of preparing a Li film, wherein said Li film is fabricated by directly decomposing a compound of Li under a vacuum evaporation condition, and said compound is Li3N. Said Li film is fabricated by decomposing Li3N at an evaporation rate of 0.01-0.25 nm/s and an evaporation temperature of 300-450° C., and said Li film has a thickness of 0.3-5.0 nm. The present invention also relates to an organic light emitting device comprising said Li film as an electron injection layer and a method for the preparation thereof, and an organic light emitting device including an electron injection layer comprising an electron transport material doped with Li obtained by decomposing Li3N under a vacuum evaporation condition, and a method for the preparation thereof.
    Type: Application
    Filed: November 29, 2011
    Publication date: June 7, 2012
    Inventors: Yong QIU, Deqiang Zhang, Yang Li, Guohui Zhang, Kongwu Wu, Lian Duan, Yudi Gao
  • Publication number: 20110014729
    Abstract: A donor film for a laser induced thermal imaging method capable of improving the optical efficiency of an emission layer, a light emitting device using the same, and a method of manufacturing the light emitting device are provided. The donor film for a laser induced thermal imaging method includes a base substrate, a light to heat conversion layer (LTHC) provided on the base substrate and having a pattern with a predetermined step difference, and a transfer layer provided on the LTHC. It is possible to improve the optical efficiency of the emission layer by patterning the transfer layer using the LTHC having the pattern with a predetermined step difference.
    Type: Application
    Filed: September 24, 2010
    Publication date: January 20, 2011
    Applicant: SAMSUNG MOBILE DISPLAY CO., LTD.
    Inventors: Nam-Choul YANG, Lian DUAN, Mu-Hyun KIM, Seong-Taek LEE
  • Publication number: 20090267499
    Abstract: The present invention provides an organic light emitting device and a fabrication method thereof, comprising a substrate, an anode layer formed on said substrate, an organic function layer formed on said anode layer, and a cathode layer formed on said organic function layer, characterized in that, further comprising a cathode interface modification layer between said organic function layer and said cathode layer, wherein said cathode interface modification layer contains a compound AxByCz, A is an element of Group IA or IIA, B is an element of Group IIIA or VA, C is a hydrogen element, and 1?x?2, y ? [0,1], 1?z?4. In the present invention, the cathode interface modification layer is formed after forming a light emitting layer, the cathode interface modification layer contains a compound AxByCz, the electron injection ability at the cathode interface can be improved by adding the cathode interface modification layer, and hence the device performance can be significantly improved.
    Type: Application
    Filed: April 22, 2009
    Publication date: October 29, 2009
    Inventors: Yong Qiu, Lian Duan, Yang Li, Guohui Zhang
  • Publication number: 20090189509
    Abstract: The present invention relates to monochromatic organic light emitting devices. The organic light emitting device includes a substrate, an anode, a cathode and an organic electroluminescent medium disposed between the anode and the cathode, wherein the organic electroluminescent medium includes compound monochromatic luminescent layer; and the compound monochromatic luminescent layer includes host A doped with monochromatic dopant and host B doped with monochromatic dopant, wherein the host A is consisted of two kinds of materials with different transporting characteristics, one is hole-transporting material, and the other is electron-transporting material. In addition, the present invention further relates to white organic light emitting devices, wherein the organic electroluminescent medium is consisted of at least one compound monochromatic luminescent layer, which includes host A doped with monochromatic dopant and host B doped with monochromatic dopant.
    Type: Application
    Filed: December 3, 2008
    Publication date: July 30, 2009
    Applicants: Tsinghua University, Beijing Visionox Technology Co., Ltd., Kunshan Visionox Display Co., Ltd.
    Inventors: Yong Qiu, Kongwu Wu, Guohui Zhang, Lian Duan
  • Publication number: 20090045737
    Abstract: The present invention relates to a method of preparing a Li film, wherein said Li film is fabricated by directly decomposing a compound of Li under a vacuum evaporation condition, and said compound is Li3N. Said Li film is fabricated by decomposing Li3N at an evaporation rate of 0.01-0.25 nm/s and an evaporation temperature of 300-450° C., and said Li film has a thickness of 0.3-5.0 nm.
    Type: Application
    Filed: August 15, 2008
    Publication date: February 19, 2009
    Inventors: Yong QIU, Deqiang ZHANG, Yang LI, Guohui ZHANG, Kongwu WU, Lian DUAN, Yudi GAO