Patents by Inventor Dajun Wu

Dajun Wu 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: 20220014123
    Abstract: A linear resonant device and a braking method for the same. The linear resonant device comprises a linear resonant motor and a drive chip. The drive chip pre-stores a drive waveform and at least one first braking waveform therein. The method comprises: determining, in response to a braking instruction, whether vibration of the linear resonant motor meets a first condition while being driven by the drive waveform; and if so, controlling the drive chip to drive, by using the first braking waveform, the linear resonant motor and to conduct a first braking process for the linear resonant motor, wherein the first braking waveform comprises at least two pulse waveforms, and an amplitude value of each of the at least two pulse waveforms gradually decreases along a propagation direction of the first braking waveform.
    Type: Application
    Filed: December 12, 2019
    Publication date: January 13, 2022
    Inventors: Guanxing ZHAO, Shaofu WU, Dajun WU, Zhijun MENG
  • Patent number: 10958203
    Abstract: There are provided a method, a system and a device for calibrating a frequency of a driving voltage waveform for a linear resonance device. An actual sampling frequency is continuously corrected, so that a difference between a measured natural frequency of the linear resonance device obtained during a calibration process and a frequency of a standard driving voltage waveform stored in a driving chip for the linear resonance device is in a predetermined range. The driving chip outputs a driving waveform at a finally corrected actual sampling frequency, to drive the linear resonance device. Further, only an actual sampling frequency is required to be adjusted, and it is not required to modify waveform data stored in the driving chip for the linear resonance device.
    Type: Grant
    Filed: November 14, 2019
    Date of Patent: March 23, 2021
    Assignee: Shanghai Awinic Technology Co., LTD
    Inventors: Zhijun Meng, Shaofu Wu, Guanxing Zhao, Dajun Wu
  • Publication number: 20200195184
    Abstract: There are provided a method, a system and a device for calibrating a frequency of a driving voltage waveform for a linear resonance device. An actual sampling frequency is continuously corrected, so that a difference between a measured natural frequency of the linear resonance device obtained during a calibration process and a frequency of a standard driving voltage waveform stored in a driving chip for the linear resonance device is in a predetermined range. The driving chip outputs a driving waveform at a finally corrected actual sampling frequency, to drive the linear resonance device. Further, only an actual sampling frequency is required to be adjusted, and it is not required to modify waveform data stored in the driving chip for the linear resonance device.
    Type: Application
    Filed: November 14, 2019
    Publication date: June 18, 2020
    Applicant: Shanghai Awinic Technology Co., LTD
    Inventors: Zhijun MENG, Shaofu WU, Guanxing ZHAO, Dajun WU
  • Patent number: 8723585
    Abstract: Provided is a level shift circuit which includes: a first level shift module; a first signal input terminal for providing a first input signal for the first level shift module; a first signal output terminal for providing output from the first level shift module; a second level shift module; a second signal input terminal for providing a second input signal for the second level shift module; a second signal output terminal for providing output from the second level shift module; a drive module connected to the first signal output terminal and the second signal output terminal; and a drive signal output terminal from the drive module. The level shift circuit of the present invention can be applicable for the requirements of BCD process and prevent damages to the high-voltage device due to the excessively high gate voltage.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: May 13, 2014
    Assignee: Shanghai Belling Corp., Ltd.
    Inventors: Zhengcai Qin, Qifu Liu, Nan Liu, Dajun Wu, Chengjie Zhou, Ning Lu, Ding Xu
  • Publication number: 20130249617
    Abstract: Provided is a level shift circuit which includes: a first level shift module; a first signal input terminal for providing a first input signal for the first level shift module; a first signal output terminal for providing output from the first level shift module; a second level shift module; a second signal input terminal for providing a second input signal for the second level shift module; a second signal output terminal for providing output from the second level shift module; a drive module connected to the first signal output terminal and the second signal output terminal; and a drive signal output terminal from the drive module. The level shift circuit of the present invention can be applicable for the requirements of BCD process and prevent damages to the high-voltage device due to the excessively high gate voltage.
    Type: Application
    Filed: December 8, 2010
    Publication date: September 26, 2013
    Applicant: SHANGHAI BELLING CORP LTD
    Inventors: Zhengcai Qin, Qifu Liu, Nan Liu, Dajun Wu, Chengjie Zhou, Ning Lu, Ding Xu
  • Publication number: 20120063695
    Abstract: In one embodiment, a method for encoding a digital picture of a sequence of digital pictures is provided, the digital picture comprising a plurality of pixels, wherein the plurality of pixels is associated at least partially with a first group of pixels and the plurality of pixels or a plurality of pixels of another digital picture is associated at least partially with at least one second group of pixels. The method comprises determining, for the second group of pixels, a second group of pixels coding mode, determining, for the first group of pixels, based on the second group of pixels coding mode, a first group of pixels coding mode, and encoding the digital picture using the first group of pixels coding mode for the first group of pixels.
    Type: Application
    Filed: October 15, 2009
    Publication date: March 15, 2012
    Inventors: Dajun Wu, Wei Siong Lee, Jo Yew Tham, Kwong Huang Goh, Susanto Rahardja
  • Patent number: 8094720
    Abstract: A method for inter-mode prediction in video coding, the method comprising checking a data block of an image for zero motion; computing frame difference of the data block based on the checking for zero motion; and making an inter-mode prediction selection based on the computed frame difference.
    Type: Grant
    Filed: August 25, 2004
    Date of Patent: January 10, 2012
    Assignee: Agency for Science Technology and Research
    Inventors: Keng Pang Lim, Dajun Wu, Si Wu, Susanto Rahardja, Feng Pan, Xiao Lin, Zhengguo Li
  • Publication number: 20110261887
    Abstract: In various embodiments, a method for estimating motion in a plurality of frames is provided, the method including determining a first set of motion vectors with respect to a first frame and a second frame, the second frame being in succession with the first frame along a time direction, determining a second set of motion vectors with respect to a predicted frame and the second frame, the predicted frame being in succession with the first frame along the time direction; wherein some motion vectors of the second set of motion vectors are interpolated from motion vectors of the first set of motion vectors; and determining a third set of motion vectors based on the first set of motion vectors and the second set of motion vectors.
    Type: Application
    Filed: June 5, 2009
    Publication date: October 27, 2011
    Inventors: Wei Siong Lee, Yih Han Tan, Jo Yew Tham, Kwong Huang Goh, Dajun Wu
  • Patent number: 7876821
    Abstract: A method for rate control for encoding video sequence, wherein the video sequence includes a plurality of Group Of Pictures, wherein each Group of Picture includes at least and I-frame and an Inter-frame, where the rate control method includes the following steps for the encoding of the Inter-frame in the Group of Picture: determining a desired frame rate based on an available bandwidth of a channel for transmitting the video sequence and an available computational resources for the encoding process; determining a target buffer level based on the desired frame rate and the position of the Inter-frame with respect to the I-frame; and determining a target bit rate based on the target buffer level and the available channel bandwidth, wherein the target bit rate is used for controlling the rate of encoding the video sequence.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: January 25, 2011
    Assignee: Agency for Science, Technology and Research
    Inventors: Zhengguo Li, Feng Pan, Keng Pang Lim, Dajun Wu, Rongshan Yu, Genan Feng, Dusheng Wang
  • Publication number: 20070140337
    Abstract: A method for inter-mode prediction in video coding, the method comprising checking a data block of an image for zero motion; computing frame difference of the data block based on the checking for zero motion; and making an inter-mode prediction selection based on the computed frame difference.
    Type: Application
    Filed: August 25, 2004
    Publication date: June 21, 2007
    Inventors: Keng Lim, Dajun Wu, Si Wu, Susanto Rahardja, Feng Pan, Xiao Lin, Zhengguo Li
  • Patent number: D822836
    Type: Grant
    Filed: March 24, 2017
    Date of Patent: July 10, 2018
    Assignee: Shenzhen Do Intelligent Technology Co., Ltd.
    Inventor: Dajun Wu
  • Patent number: D875728
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: February 18, 2020
    Assignee: Shenzhen DO Intelligent Technology Co., Ltd.
    Inventor: Dajun Wu
  • Patent number: D891424
    Type: Grant
    Filed: June 6, 2017
    Date of Patent: July 28, 2020
    Assignee: Shenzhen DO Intelligent Technology Co., Ltd.
    Inventor: Dajun Wu
  • Patent number: D909369
    Type: Grant
    Filed: August 7, 2019
    Date of Patent: February 2, 2021
    Assignee: SHENZHEN DO INTELLIGENT TECHNOLOGY CO., LTD.
    Inventor: Dajun Wu
  • Patent number: D920327
    Type: Grant
    Filed: April 28, 2018
    Date of Patent: May 25, 2021
    Assignee: Shenzhen DO Intelligent Technology Co., Ltd.
    Inventor: Dajun Wu
  • Patent number: D920328
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: May 25, 2021
    Assignee: Shenzhen DO Intelligent Technology Co., Ltd.
    Inventor: Dajun Wu
  • Patent number: D926753
    Type: Grant
    Filed: July 29, 2019
    Date of Patent: August 3, 2021
    Assignee: SHENZHEN DO INTELLIGENT TECHNOLOGY CO., LTD.
    Inventor: Dajun Wu
  • Patent number: D927484
    Type: Grant
    Filed: September 10, 2019
    Date of Patent: August 10, 2021
    Assignee: Shenzhen DO Intelligent Technology Co., Ltd.
    Inventor: Dajun Wu
  • Patent number: D927485
    Type: Grant
    Filed: December 13, 2019
    Date of Patent: August 10, 2021
    Assignee: SHENZHEN DO INTELLIGENT TECHNOLOGY CO., LTD.
    Inventor: Dajun Wu
  • Patent number: D928148
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: August 17, 2021
    Assignee: SHENZHEN DO INTELLIGENT TECHNOLOGY CO., LTD.
    Inventor: Dajun Wu