Patents by Inventor Lei Dai

Lei Dai 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: 20210063813
    Abstract: A display apparatus includes a first polarizer, a first liquid crystal panel, a second polarizer, a second liquid crystal panel and a third polarizer which are sequentially stacked, wherein the second polarizer includes two protective layers, and a polarizing layer positioned between the two protective layers.
    Type: Application
    Filed: July 7, 2020
    Publication date: March 4, 2021
    Inventors: Jiaqing LIU, Yanping LIAO, Ke DAI, Lei GUO
  • Publication number: 20210059676
    Abstract: A degradable intestinal complete diversion device, made of biocompatible degradable materials, includes a circular tube constituting the bridge for the intestinal incisions on both sides to crawl towards each other and anastomosed; the end of the circular tube is connected with a gradually expanding flared opening, and a convex ring for binding the broken end of the intestine is arranged on the circular tube near each flared opening, and the hollow inner cavity of the circular tube is provided with a barrier film for blocking the hollow inner cavity. The invention used with a drainage tube realizes complete intestinal diversion without secondary operations of stoma reintroduction.
    Type: Application
    Filed: August 21, 2020
    Publication date: March 4, 2021
    Inventors: Xiujun CAI, Zhongyu WU, Mingyu CHEN, Diyu HUANG, Yifan WANG, Lei SHI, Weijian DAI, Yanli MA
  • Publication number: 20210063735
    Abstract: A method and device for controlling image display in a VR system, and a VR head mounted device. The method comprises: monitoring a synchronization signal of an image frame in a VR system and acquiring an original 2D image; sampling sensor data at a preset time point before a next synchronization signal arrives to obtain latest pose information of a tracked object; converting the original 2D image into a corresponding 3D image, and calculating a motion vector corresponding to each pixel point of the 3D image according to the latest pose information and pose information corresponding to the 3D image; performing position transformation on pixel points of the original 2D image based on the motion vector, and filling at pixel points of a vacant area appearing after the position transformation to obtain a target frame; and triggering display of the target frame when the next synchronization signal arrives.
    Type: Application
    Filed: August 1, 2019
    Publication date: March 4, 2021
    Inventors: Lei CAI, Tianrong DAI
  • Patent number: 10936829
    Abstract: Embodiments of the present disclosure provide a method and apparatus for processing a multi-language text. According to embodiments of the present disclosure, the multi-language text including contents in a plurality of languages may be encoded with a Unicode. The method further comprises splitting the multi-language text into a plurality of parts based on the Unicode of the multi-language text, contents of the plurality of parts having different languages. In addition, the multi-language text may also be processed based on the plurality of parts.
    Type: Grant
    Filed: June 21, 2017
    Date of Patent: March 2, 2021
    Assignee: EMC IP Holding Company LLC
    Inventors: Kun Wu Huang, Winston Lei Zhang, Chao Chen, Jingjing Liu, Duke Hongtao Dai
  • Publication number: 20210024511
    Abstract: Provided is a compound represented by formula 1, and a display panel and a display apparatus including the compound. In formula 1, L1 and L2 are each independently selected from the group consisting of a single bond, C6-C30 aryl, and C4-C30 heteroaryl; a and b are each independently selected from 0, 1, 2, 3, or 4; D1 and D2 are each independently a nitrogen-containing electron donor unit selected from the group consisting of carbazolyl and derivative groups thereof, acridinyl and derivative groups thereof, diarylamino and derivative groups thereof, and triarylamino and derivative groups thereof; and c and d are each independently selected from 0, 1, 2, 3, or 4, and c+d?1.
    Type: Application
    Filed: September 29, 2020
    Publication date: January 28, 2021
    Inventors: Wei GAO, Lei ZHANG, Wenpeng DAI, Quan RAN, Lu ZHAI, Wenjing XIAO, Jinghua NIU
  • Publication number: 20200407359
    Abstract: The present disclosure relates to the field of organic electroluminescence materials and particularly relates to a compound, an OLED display panel and a display device.
    Type: Application
    Filed: October 3, 2019
    Publication date: December 31, 2020
    Inventors: Wenpeng Dai, Wei Gao, Lei Zhang, Jinghua Niu, Ying Liu, Ping An
  • Publication number: 20200407383
    Abstract: The present disclosure relates to the field of organic electroluminescence, in particular to a compound, an organic electroluminescence device and a display device. The compound has a structure shown in a formula (I): and X is selected from O atom or S atom; X1-X8 are each independently selected from C atoms or N atoms, and at least one of X1-X8 is N atoms; A and B are each independently selected from any one or more of the substituted or unsubstituted C6-C40 aryl, and substituted or unsubstituted C4-C40 heteroaryl; R1 is selected from C1-C9 alkyl, substituted or unsubstituted C6-C18 aryl, substituted or unsubstituted C4-C30 heteroaryl.
    Type: Application
    Filed: October 3, 2019
    Publication date: December 31, 2020
    Applicant: Shanghai Tianma AM-OLED Co., Ltd.
    Inventors: Wenpeng DAI, Wei Gao, Lei Zhang, Jinghua Niu, Ying Liu, Ping An
  • Publication number: 20200411769
    Abstract: The present disclosure relates to the field of organic electroluminescence materials and particularly relates to a compound and an organic light emitting display device. The compound has a structure represented by Formula (I): and, m, n, p, q, r, s, u, and v are each independently selected from 0 or 1, at least one of r and s is 1, at least one of u and v is 1, L1, L2, L3, and L4 are each independently selected from substituted or unsubstituted C6-C40 aryl, or substituted or unsubstituted C3-C40 heterocyclyl, and A1, A2, A3, and A4 each are independently selected from an electron acceptor unit.
    Type: Application
    Filed: October 1, 2019
    Publication date: December 31, 2020
    Applicant: Shanghai Tianma AM-OLED Co., Ltd.
    Inventors: Wei GAO, Ying LIU, Lei ZHANG, Wenpeng DAI, Jinghua NIU, Gaojun HUANG
  • Publication number: 20200403161
    Abstract: Provided are a compound, an organic light-emitting element including the same, a display panel and a display device. The compound has a structure represented by Formula I. The organic light-emitting element includes an anode, a cathode and an organic thin film layer disposed between the anode and the cathode; where the organic thin film layer includes a light-emitting layer, and further includes any one or a combination of at least two of a hole transport layer, an electron blocking layer and an auxiliary light-emitting layer, and at least one of the hole transport layer, the electron blocking layer and the auxiliary light-emitting layer contains at least one of the compounds. The compound has a relatively shallow HOMO energy level, a relatively shallow LUMO energy level, a relatively high triplet energy level, an appropriate hole mobility, a relatively high Tg, a large molecular torque and good thermal stability.
    Type: Application
    Filed: September 3, 2020
    Publication date: December 24, 2020
    Inventors: Quan RAN, Wei GAO, Jinghua NIU, Lei ZHANG, Wenpeng DAI
  • Publication number: 20200403159
    Abstract: Provided are a compound having a structure represented by Formula I, and an organic light-emitting element, a display panel and a display device including the same. The organic light-emitting element includes an anode, a cathode and an organic thin film disposed between the anode and the cathode; where the organic thin film includes any one or a combination of at least two of a light-emitting layer, an electron transport layer and a hole blocking layer, and includes at least the light-emitting layer, and at least one of the light-emitting layer, the electron transport layer or the hole blocking layer contains at least one of the compounds. The compound has a relatively deep LUMO energy level, a relatively deep HOMO energy level, a relatively high triplet energy level, a high electron mobility, a high Tg, and good thermal and chemical stability, and is not easy to crystallize.
    Type: Application
    Filed: September 3, 2020
    Publication date: December 24, 2020
    Inventors: Lei ZHANG, Wei Gao, Jinghua Niu, Wenpeng Dai, Quan Ran, Xia Li
  • Publication number: 20200395554
    Abstract: Provided are a compound and an organic electro-optical device containing the same. The compound has a structure represented by Formula I. The organic electro-optical device comprises an anode, a cathode, and at least one organic thin film layer located between the cathode and the anode. The molecule of the compound provided by the present disclosure has higher rigidity, a large conjugated system, a deeper LUMO energy level, a higher triplet energy level and good molecular stability, and is not easy to crystallize, and thus the compound can be used as an electron transport material or a hole blocking material of the organic electro-optical device, facilitating the reduction of the turn-on voltage of the device, the improvement of current efficiency and the increase of service life.
    Type: Application
    Filed: August 31, 2020
    Publication date: December 17, 2020
    Inventors: Wenjing XIAO, Wei Gao, Lei Zhang, Wenpeng Dai, Quan Ran, Jinghua Niu
  • Publication number: 20200388764
    Abstract: The present disclosure relates to the field of OLED technologies, and provides a light-emitting host material including an adamantane structure, and having a structure represented by Formula (I). L1 and L2 are each independently selected from a single bond, phenyl, naphthyl or the like. The electron donor D is selected from carbazolyl and its derivative groups, diphenylamino and its derivative groups, or acridinyl and its derivative groups. The electron acceptor A is mainly selected from a nitrogen-containing heterocyclic substituent, a cyano-containing substituent, a triarylboron-based substituent. The D-(?)-?-(?)-A structure in the compound has a bipolar property, and the intermediate ? bond can effectively interrupt the intramolecular charge transmission between the electron donor D and the electron acceptor A. The compound is used as a host material of the light-emitting layer in an OLED to reduce the efficiency roll-off of the blue light material, and enhance luminance and efficiency.
    Type: Application
    Filed: October 30, 2019
    Publication date: December 10, 2020
    Inventors: Wenpeng Dai, Wei Gao, Jinghua Niu, Lei Zhang, Yan Lu, Dongyang Deng
  • Patent number: 10862506
    Abstract: The present disclosure relates to an encoder and an encoding method thereof, as well as a decoder and a decoding method thereof, which can be used to reduce the number of wires necessary for data transmission and transmit more data at a faster speed with the same number of wires, thereby improving the efficiency of data transmission. The encoder may comprises two input terminals configured to receive two input signals simultaneously, each input terminal comprises a wire identifying a positive voltage and a wire identifying a negative voltage; and a plurality of output terminals, wherein each output terminal comprises a wire identifying a positive voltage and a wire identifying a negative voltage, a combination of the two input signals corresponds to one of the plurality of output terminals, and the output terminal to which the current combination of the two input signals corresponds is configured to output signals through the two wires of the output terminal.
    Type: Grant
    Filed: May 13, 2019
    Date of Patent: December 8, 2020
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., CHENGDU BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Lei Dai, Taehyun Kim
  • Patent number: 10860590
    Abstract: The present disclosure provides method and apparatus of information processing. The method comprises: in response to a request of a first user for first information, searching a database to obtain second information; determining a first relevance between a second user associated with the second information and the first user; determining a second relevance between the second information and the first information based on the first relevance; and presenting the second information to the first user based at least in part on the second relevance.
    Type: Grant
    Filed: April 17, 2018
    Date of Patent: December 8, 2020
    Assignee: EMC IP Holding Corporation LLC
    Inventors: Duke Hongtao Dai, Winston Lei Zhang, Kun Wu (Sheperd) Huang, Charlie Chao Chen, Jingjing Liu
  • Patent number: 10859840
    Abstract: Provided are graphics rendering method and apparatus of virtual reality, which include according to an acquired spatial position information and direction information of a head-mounted virtual reality device, rendering in accordance with a first angular resolution to generate a first image corresponding to the spatial position information and the direction information; according to an acquired position information of a human eye fixation point on the display screen, rendering in accordance with a second angular resolution to generate a second image corresponding to the position information of the human eye fixation point; and synthesizing the first image and the second image into a third image. Since the first angular resolution and the second angular resolution adopted in the present disclosure are lower angular resolutions, when rendering a virtual reality image, the calculating amount of the GPU may be effectively reduced, and the image rendering efficiency may be improved.
    Type: Grant
    Filed: July 24, 2018
    Date of Patent: December 8, 2020
    Assignee: GOERTEK INC.
    Inventors: Tianrong Dai, Xin Zhang, Lei Cai
  • Publication number: 20200381631
    Abstract: The present disclosure relates to the technical field of OLED, and provides a compound having TADF property. In an embodiment the compound has a structure according to Formula (1), in which X1-X5 are each independently selected from a carbon atom and a nitrogen atom, and at least one of X1-X5 is a nitrogen atom; R11-R20 are each selected from the group consisting of a hydrogen atom, a fluorine atom, alkyl, alkoxy, cyano, trifluoromethyl, an electron-accepting group, and an electron-donating group; at least one of R11-R15 is an electron-donating group or an electron-accepting group, and at least one of R16-R20 is an electron-donating group or an electron-accepting group; when each of R11-R15 is an electron-accepting group, at least one of R16-R20 is an electron-donating group, and each of R11-R15 is an electron-donating group, at least one of R16-R20 is an electron-accepting group.
    Type: Application
    Filed: December 31, 2019
    Publication date: December 3, 2020
    Inventors: Wei GAO, Lei ZHANG, Wenpeng DAI, Yang LI, Jinghua NIU
  • Publication number: 20200373501
    Abstract: The present disclosure belongs to the technical field of organic light-emitting diods (OLEDs), and provides a compound used as an electron transmission material of OLEDs. Molecules of the compounds include an aromatic ring (or aromatic fused ring) and a phenanthroline group that are connected to each other. In an embodiment, the compound according to the present disclosure includes two types of groups, i.e., an aromatic ring (or aromatic fused ring) and a phenanthroline (or benzoquinoline) group. These two groups not only have good electron accepting ability, but also can be well doped with metals. The planarity of the two groups is conducive to the stacking of molecules, which facilitates the combination of holes and electrons and generates excitons, thereby increasing the electron mobility of the material and improving efficiency of device.
    Type: Application
    Filed: October 30, 2019
    Publication date: November 26, 2020
    Inventors: Lei Zhang, Wei Gao, Jinghua Niu, Wenpeng Dai, Yan Lu
  • Patent number: D906281
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: December 29, 2020
    Assignee: SHENZHEN VOXTECH CO., LTD.
    Inventors: Haofeng Zhang, Hengnan Dai, Mingmin Wang, Lei Zhong, Xin Yu
  • Patent number: D907002
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: January 5, 2021
    Assignee: SHENZHEN VOXTECH CO., LTD.
    Inventors: Haofeng Zhang, Hengnan Dai, Mingmin Wang, Lei Zhong, Xin Yu
  • Patent number: D909996
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: February 9, 2021
    Assignee: SHENZHEN VOXTECH CO., LTD.
    Inventors: Haofeng Zhang, Hengnan Dai, Mingmin Wang, Lei Zhong, Xin Yu