Patents by Inventor Yonggang Du

Yonggang Du 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: 10333069
    Abstract: The present invention provides methods for purifying a layer of carbon nanotubes comprising providing a precursor layer of substantially aligned carbon nanotubes supported by a substrate, wherein the precursor layer comprises a mixture of first carbon nanotubes and second carbon nanotubes; selectively heating the first carbon nanotubes; and separating the first carbon nanotubes from the second carbon nanotubes, thereby generating a purified layer of carbon nanotubes. Devices benefiting from enhanced electrical properties enabled by the purified layer of carbon nanotubes are also described.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: June 25, 2019
    Assignees: The Board of Trustees of The University of Illinois, Northwestern University, University of Miami
    Inventors: John A. Rogers, William L. Wilson, Sung Hun Jin, Simon N. Dunham, Xu Xie, Ahmad Islam, Frank Du, Yonggang Huang, Jizhou Song
  • Publication number: 20190155113
    Abstract: An array substrate is provided, comprising a display area and a non-display area outside the display area. The non-display area is provided with a first transistor and a first conductive region electrically connected with the first transistor. A control terminal, and one of a source and a drain of the first transistor are both electrically connected to a data line in the display area, the other of the source and the drain of the first transistor is electrically connected to the first conductive region. For this array substrate, the static electricity generated on the data line in the rubbing process can be led to the first conductive region through the first transistor, so as to prevent the static electricity from being transmitted to the display area, which could have destroyed the TFT device in the display area.
    Type: Application
    Filed: April 16, 2018
    Publication date: May 23, 2019
    Inventors: Peng ZENG, Yonggang DU, Zhangfei GAO, Guohua XU
  • Patent number: 9513499
    Abstract: The present invention discloses a laser repairing apparatus for a display panel, which comprises a laser generating device, a bearing device, a backlight, a first polarizer, a second polarizer and an image generating device, the laser generating device is located above the bearing device, the first polarizer is located between the backlight and the bearing device, and the second polarizer is located between the image generating device and the bearing device. In the technical solution of the present invention, the first polarizer and the second polarizer are used to control the amount of light transmittance of the transmission light, and the human eye can identify the exact positions of the defective pixels quickly and accurately by means of the transmission image having overall low brightness, and consequently, the time required for the whole repairing process is shortened.
    Type: Grant
    Filed: May 21, 2014
    Date of Patent: December 6, 2016
    Assignees: BOE TECHNOLOGY GROUP CO., LTD., HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD.
    Inventors: Yuxin Deng, Manping Niu, Ran Tong, Wei Qin, Yonggang Du
  • Publication number: 20160299365
    Abstract: The present invention discloses a laser repairing apparatus for a display panel, which comprises a laser generating device, a bearing device, a backlight, a first polarizer, a second polarizer and an image generating device, the laser generating device is located above the bearing device, the first polarizer is located between the backlight and the bearing device, and the second polarizer is located between the image generating device and the bearing device. In the technical solution of the present invention, the first polarizer and the second polarizer are used to control the amount of light transmittance of the transmission light, and the human eye can identify the exact positions of the defective pixels quickly and accurately by means of the transmission image having overall low brightness, and consequently, the time required for the whole repairing process is shortened.
    Type: Application
    Filed: May 21, 2014
    Publication date: October 13, 2016
    Inventors: Yuxin DENG, Manping NIU, Ran TONG, Wei QIN, Yonggang DU
  • Patent number: 9268186
    Abstract: Embodiments of the invention provide an array substrate, a display panel and a display device. The array substrate comprises: a plurality of data lines extending in a first direction, a counter substrate region, a plurality of data pad regions and a data repair line extending in a second direction. The counter substrate region is a projection region of a counter substrate on the array substrate after the counter substrate and the array substrate are bonded together. One end of several data lines is disposed in one data pad region, and the plurality of data pad regions are disposed on one side of the array substrate and positioned outside the counter substrate region. The data repair line is provided inside the counter substrate region, along an edge of the counter substrate region and is proximate to the plurality of data pad regions.
    Type: Grant
    Filed: October 31, 2013
    Date of Patent: February 23, 2016
    Assignees: HEFEI BOE OPTOELECTRONICS TECHNOLOGY CO., LTD., BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Ran Tong, Yonggang Du, Manping Niu, Lina Wang, Bin Wu
  • Publication number: 20140118658
    Abstract: Embodiments of the invention provide an array substrate, a display panel and a display device. The array substrate comprises: a plurality of data lines extending in a first direction, a counter substrate region, a plurality of data pad regions and a data repair line extending in a second direction. The counter substrate region is a projection region of a counter substrate on the array substrate after the counter substrate and the array substrate are bonded together. One end of several data lines is disposed in one data pad region, and the plurality of data pad regions are disposed on one side of the array substrate and positioned outside the counter substrate region. The data repair line is provided inside the counter substrate region, along an edge of the counter substrate region and is proximate to the plurality of data pad regions.
    Type: Application
    Filed: October 31, 2013
    Publication date: May 1, 2014
    Applicants: Boe Technology Group Co., Ltd., Hefei Boe Optoelectronics and Technology Co., Ltd.
    Inventors: Ran TONG, Yonggang DU, Manping NIU, Lina WANG, Bin WU
  • Patent number: 8514837
    Abstract: There is elucidated a method of communicating data packets (210; 520) within a data communication network (10). The network (10) comprises communication nodes (30a, 30b, 30c, 40), wherein a first nodal set (30a, 30b, 30c) comprises nodes which are operable to communicate via a communication medium with a second nodal set (40) comprising at least one of said nodes (30a, 30b, 30c, 40). The method comprises steps of: (a) mutually synchronizing together two or more nodes of said first nodal set; and (b) simultaneously in a synchronized manner transmitting one or more data packets from the mutually synchronized two or more nodes of said first nodal set via said communication medium for substantially simultaneous reception at said second nodal set (40).
    Type: Grant
    Filed: June 12, 2007
    Date of Patent: August 20, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Xiangyu Wang, Yonggang Du
  • Patent number: 8432868
    Abstract: The present invention takes the advantage of the WLAN resources in hotspots for voice and data connections and enables seamless handover between WWAN and WLAN and vice versa. This allows two users in the hotspots to communicate with each other by making a voice over IP (VoIP) or video call, thus achieving cost savings for the end users and WWAN resources savings for the wireless operators. According to one embodiment of the invention, a mobile terminal has wireless wide area network (WWAN) and wireless local area network (WLAN) interfaces. The mobile terminal via a WWAN. If a WLAN is present, the mobile terminal sends a handover request together with its network address to the called mobile terminal, using a short message service (SMS) technique or a watermarking technique, for initiating a WLAN call with the called mobile terminal via a WLAN. After the WLAN call is established with the called mobile terminal, the mobile terminal releases the WWAN call.
    Type: Grant
    Filed: May 6, 2004
    Date of Patent: April 30, 2013
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Lei Feng, Xiaoling Shao, Jiawen Tu, Yonggang Du, Bo Liu, Xiaohui Jin, Jianbo Tian, Xiaolu Sun
  • Patent number: 8325672
    Abstract: A communication method for a mobile terminal to perform seamless handover between a WWAN and a WLAN. The method comprises receiving a registration message sent by the mobile terminal when it enters the WLAN, wherein the registration message at least contains a WLAN address that the mobile terminal acquires when entering the WLAN; establishing the mapping relationship between the WWAN address and the WLAN address of the mobile terminal according to the registration message; encapsulating the WLAN address into the data information to be sent to the mobile terminal according to the mapping relationship when receiving the data information to be sent to the mobile terminal from a source address; and sending the data information containing the WLAN address to the mobile terminal via the WLAN.
    Type: Grant
    Filed: November 3, 2004
    Date of Patent: December 4, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Yonggang Du, Xiaoling Shao, Xiaohui Jin, Lei Feng, Bo Liu
  • Patent number: 8150162
    Abstract: The present invention provides a 3D handwriting recognition system that allows users to freely write words or characters in a 3D space in a touchless manner, without requiring any physical medium such as a pad or a tablet. The users' handwriting input in a 3D space will be tracked by an input device of the system that generates corresponding 3D motion data and wirelessly transfers the 3D motion data to a recognition device of the system. The 3D motion data will be converted and then mapped onto a 2D plane to generate corresponding 2D images for handwriting recognition. In this way, the users' inputting will never be limited to any screen, pad or plane, and the users will have more flexibility and enjoyable writing experience.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: April 3, 2012
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Yonggang Du, Jiawen Tu, Lei Feng, Xiaoling Shao
  • Patent number: 7962140
    Abstract: A method to be performed by a user terminal with WWAN and WLAN interfaces, comprising steps of: communicating via the WWAN interface; inspecting whether its WLAN interface is available; entering into a WWAN-to WLAN state from a WWAN active state if its WLAN interface is available; said user terminal provides a public server with known network address with its presence information said WWAN-to-WLAN state; and acquiring the network address of another user terminal communicating with said user terminal from said server, sending a WLAN call request to said another user terminal by using said address; entering into WLAN active state after receiving the message for accepting the WLAN call request from said another user terminal.
    Type: Grant
    Filed: August 19, 2004
    Date of Patent: June 14, 2011
    Assignee: ST-Ericsson SA
    Inventors: Lei Feng, Xiaoling Shao, Xiaohui Jin, Yonggang Du, Bo Liu, Xiaolu Sun
  • Patent number: 7801260
    Abstract: A time reference point can be determined in a radio system by sending a synchronization sequence s(i), i=0, . . . N?1, from transmitter X, 40 to receiver Y, 48, and by detecting the peak value at the output of a matched-filter, 44, h(i)=s(N?1-i) on Y. In practical systems the accuracy of this peak detection is limited by interference and noise on the radio channel. To increase the peak detection accuracy, we propose to repeat the transmission of the same synchronization sequence K times. The interval L between repetitions is constant and the amplitude of the synchronization sequence in each repetition varies according to a given variation pattern a(jL), j=0, . . . , K?1. The receiver Y, 48 knows L and a(jL), j=0, . . . , K?1. After comparison to a threshold, the matched-filter 44 at the receiver 48 may deliver peaks resulted from repeatedly received synchronization sequences or peaks caused by interference and/or noise.
    Type: Grant
    Filed: June 13, 2002
    Date of Patent: September 21, 2010
    Assignee: ST-Ericsson SA
    Inventors: Yonggang Du, Li Sun
  • Publication number: 20100220697
    Abstract: The present invention proposes a method for performing multi-mode conversations for mobile terminals, comprising the steps of: 1)detecting whether there is Wireless Local Area Network (WLAN) available nearby; 2)accessing a network device for correlative location information of another mobile terminal which it intends to communicate with when there is a WLAN available; 3)establishing communication with said another mobile terminal by using said correlative location information via said WLAN after receiving said correlative location information of said another mobile terminal sent back by said network device; and 4)accessing said network device to request updating correlative location information of said mobile terminal when said correlative location information of said mobile terminal changes.
    Type: Application
    Filed: June 29, 2006
    Publication date: September 2, 2010
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventors: Bo Liu, Xiaohui Jin, Xiaoling Shao, Rob Davies, Yonggang Du
  • Patent number: 7746915
    Abstract: A wireless network employs at least a base station (1 to 3) and a plurality of assigned terminals (4 to 14) for exchanging user data and control data. That base station (1 to 3) includes a device (21, 22) for correlating a signaling sequence transmitted by at least one terminal (4 to 14) to indicate the wish to use a contention channel and for detecting the pulse evolved from a received and correlated signaling sequence. After a signaling sequence has been detected, the base station (1 to 3) transmits a provision message over a contention channel to be utilized by the assigned terminals (4 to 14).
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: June 29, 2010
    Assignees: U.S. Philips Corporation, Sharp Corporation
    Inventors: Christoph Herrmann, Yonggang Du
  • Publication number: 20090232234
    Abstract: The present invention relates to a communication system comprising a plurality of terminals each having an uplink transmission unit (1) for transmitting radio frequency OFDM signals at a radio frequency and an access point having an uplink receiving unit (4) for concurrently receiving said radio frequency OFDM signals from at least two terminals, said OFDM signals being Orthogonal Frequency Division Multiplex (OFDM) modulated, wherein the bandwidth of said uplink transmission units and of the transmitted radio frequency OFDM signals is smaller than the bandwidth of said uplink receiving unit and that the bandwidth of at least two uplink transmission units and of their transmitted radio frequency OFDM signals is different.
    Type: Application
    Filed: June 15, 2007
    Publication date: September 17, 2009
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: Yonggang Du
  • Publication number: 20090201984
    Abstract: The present invention relates to a bandwidth asymmetric communication system comprising at least one terminal having an uplink transmission unit (1) for transmitting radio frequency OFDM signals at a radio frequency and an access point having an uplink receiving unit (4) for receiving said radio frequency OFDM signals, said OFDM signals being Orthogonal Frequency Division Multiplex (OFDM) modulated. To reduce the implementation complexity and synchronization requirements a communication system is proposed in which the bandwidth of said uplink transmission unit and of the transmitted radio frequency OFDM signals is smaller than the bandwidth of said uplink receiving unit.
    Type: Application
    Filed: June 21, 2007
    Publication date: August 13, 2009
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: Yonggang Du
  • Publication number: 20090196163
    Abstract: The present invention relates to a communication system comprising a plurality of terminals each having an uplink transmission unit (1) for transmitting radio frequency OFDM signals at a radio frequency and an access point having an uplink receiving unit (4) for concurrently receiving said radio frequency OFDM signals from at least two terminals, said OFDM signals being Orthogonal Frequency Division Multiplex (OFDM) modulated, wherein the bandwidth of said uplink transmission units and of the transmitted radio frequency OFDM signals is smaller than the bandwidth of said uplink receiving unit, that the bandwidth of at least two uplink transmission units and of their transmitted radio frequency OFDM signals is different and that the uplink transmission unit is adapted to assign different connections for concurrently transmitting radio frequency OFDM signals to different sub-carriers in the same time slots or to the same or different sub-carriers in different time slots.
    Type: Application
    Filed: June 21, 2007
    Publication date: August 6, 2009
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.
    Inventor: Yonggang Du
  • Publication number: 20090175260
    Abstract: There is elucidated a method of communicating data packets (210; 520) within a data communication network (10). The network (10) comprises communication nodes (30a, 30b, 30c, 40), wherein a first nodal set (30a, 30b, 30c) comprises nodes which are operable to communicate via a communication medium with a second nodal set (40) comprising at least one of said nodes (30a, 30b, 30c, 40). The method comprises steps of: (a) mutually synchronizing together two or more nodes of said first nodal set; and (b) simultaneously in a synchronized manner transmitting one or more data packets from the mutually synchronized two or more nodes of said first nodal set via said communication medium for substantially simultaneous reception at said second nodal set (40).
    Type: Application
    Filed: June 12, 2007
    Publication date: July 9, 2009
    Applicant: Koninklijke Philips Electronics N.V.
    Inventors: Xiangyu Wang, Yonggang Du
  • Patent number: 7457298
    Abstract: The invention relates to a local area network including at least one bridge terminal, which bridge terminal is provided for transmitting data between the terminals of at least two sub-networks via a wireless medium. The bridge terminal is alternately connected to the sub-networks for exchanging data. For buffering received data for an unconnected sub-network, the bridge terminal includes an intermediate store.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: November 25, 2008
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Yonggang Du, Christoph Herrmann, Klaus P. May
  • Patent number: 7308266
    Abstract: The present invention provides a wireless communication system capable of managing peer-to-peer (P2P) communications. In one embodiment of the invention, upon receiving a request for initiating a call, the system determines whether P2P communication can be established between the two mobile terminals. The system also determines an operating mode of the two mobile terminals for P2P communication. If the P2P communication can be established between the two mobile terminals and both mobile terminals are in a default mode for P2P communication, the system establishes P2P communication between the two mobile terminals. On the other hand, if any one of the mobile terminals is in a prompt mode, the system sends a prompt to the mobile terminal in the prompt mode, along with information about incentives for using P2P communication services.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: December 11, 2007
    Assignee: Koninklijke Philips Electronics, N.V.
    Inventors: Yonggang Du, Li Sun, Ni Ma