Patents by Inventor Xiaodong Luo

Xiaodong Luo 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: 20150292582
    Abstract: A brake assembly and a method for manufacturing a brake assembly are provided. The brake assembly includes a brake pad affixed to a substrate. The brake pad extends from the substrate to a brake pad friction surface, and includes abradable cellular metal foam with the hardened ceramic particles.
    Type: Application
    Filed: August 29, 2012
    Publication date: October 15, 2015
    Applicant: Otis Elevator Company
    Inventors: Tahany Ibrahim El-Wardany, Aaron T. Nardi, Xiaodong Luo, Paul Sheedy, James T. Beals, Robert A. Barth, Wayde R. Schmidt
  • Publication number: 20150083533
    Abstract: A brake element is provided including a friction material. The friction material includes a polymer-based ceramic matrix composite material having a plurality of fibers. The plurality of fibers is arranged at an angle to a braking direction.
    Type: Application
    Filed: April 30, 2012
    Publication date: March 26, 2015
    Applicant: Otis Elevator Company
    Inventors: Tahany Ibrahim El-Wardany, Wayde R. Schmidt, Xiaodong Luo, Anthony Cooney, John T. Pitts
  • Patent number: 8988558
    Abstract: Image overlay in a mobile device is described. In one embodiment an imaging system of a mobile communications device includes a first camera having a control interface to a controller and a data interface to the controller, a second camera having a data interface to the first camera, and a processor to combine an image from the second camera received through the second camera data interface with an image from the first camera and to send the combined image to the controller through the data interface.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: March 24, 2015
    Assignee: OmniVision Technologies, Inc.
    Inventors: Sheaufoong Chong, Xiaodong Luo
  • Publication number: 20150077598
    Abstract: An image sensor is provided. The image sensor includes a pixel array, an analog-to-digital converter, and a processor. The analog-to-digital converter converts a black level reference signal and a pix signal from the pixel array into a first digital signal and a second digital signal, respectively. The processor obtains a black level reference value according to the first digital signal, and obtains a compensation coefficient according to the black level reference value, a maximum digital level of the analog-to-digital converter and a full signal range value. The processor obtains pix data according to the compensation coefficient, the black level reference value and the second digital signal.
    Type: Application
    Filed: July 7, 2014
    Publication date: March 19, 2015
    Inventor: XIAODONG LUO
  • Publication number: 20150077604
    Abstract: An image sensor is provided. The image sensor includes a pixel array, a sense amplifier, an analog-to-digital converter, a processor and a voltage generator. The sense amplifier obtains a first signal according to a pixel signal from the pixel array and a reference voltage, wherein the reference voltage has a first voltage level. The analog-to-digital converter converts the first signal into a first digital signal. The processor provides a feedback signal according to the first digital signal. The voltage generator adjusts the reference voltage to a second voltage level corresponding to the feedback signal. The sense amplifier removes a direct current (DC) bias voltage from the pixel signal according to the reference signal having the second voltage level.
    Type: Application
    Filed: June 26, 2014
    Publication date: March 19, 2015
    Inventor: Xiaodong LUO
  • Patent number: 8599284
    Abstract: A method of implementing high dynamic range bin algorithm in an image sensor including a pixel array with a first super row having a first integration time and a second super row having a second integration time is described. The method starts by reading out image data from the first super row into a counter. Image data from the first super row is multiplied by a factor to obtain multiplied data. The factor is a ratio between the first and the second integration times. The multiplied data is then compared with a predetermined data. The image data from the second super row is readout into the counter. If the multiplied data is larger than the predetermined data, the multiplied data from the first super row is stored in the counter. If not, the image data from the second super row is stored. Other embodiments are also described.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: December 3, 2013
    Assignee: OmniVision Technologies, Inc.
    Inventors: Yaowu Mo, Chen Xu, Min Qu, Xiaodong Luo, Donghui Wu
  • Patent number: 8576979
    Abstract: An arithmetic counter circuit for high performance CMOS image sensors includes a plurality of flip-flops of a plurality of counter stages and a plurality of multiplexers of the plurality of counter stages being coupled to the plurality of flip-flops. Each of the plurality of multiplexers coupled to receive control signals including at least one of a toggle signal, a keep signal, a shift enable signal, or a mode signal. The control signals select the output of each of the plurality of multiplexers. Each of the plurality of flip-flops is coupled to be in one of a toggle state, a keep state, a reset state or a set state based on inputs received from the plurality of multiplexers. Other embodiments are described.
    Type: Grant
    Filed: February 3, 2012
    Date of Patent: November 5, 2013
    Assignee: OmniVision Technologies, Inc.
    Inventors: Yaowu Mo, Chen Xu, Min Qu, Tiejun Dai, Rui Wang, Xiaodong Luo
  • Publication number: 20130089175
    Abstract: An arithmetic counter circuit for high performance CMOS image sensors includes a plurality of flip-flops of a plurality of counter stages and a plurality of multiplexers of the plurality of counter stages being coupled to the plurality of flip-flops. Each of the plurality of multiplexers coupled to receive control signals including at least one of a toggle signal, a keep signal, a shift enable signal, or a mode signal. The control signals select the output of each of the plurality of multiplexers. Each of the plurality of flip-flops is coupled to be in one of a toggle state, a keep state, a reset state or a set state based on inputs received from the plurality of multiplexers. Other embodiments are described.
    Type: Application
    Filed: February 3, 2012
    Publication date: April 11, 2013
    Applicant: OMNIVISION TECHNOLOGIES, INC.
    Inventors: Yaowu Mo, Chen Xu, Min Qu, Tiejun Dai, Rui Wang, Xiaodong Luo
  • Publication number: 20130088624
    Abstract: A method of implementing high dynamic range bin algorithm in an image sensor including a pixel array with a first super row having a first integration time and a second super row having a second integration time is described. The method starts by reading out image data from the first super row into a counter. Image data from the first super row is multiplied by a factor to obtain multiplied data. The factor is a ratio between the first and the second integration times. The multiplied data is then compared with a predetermined data. The image data from the second super row is readout into the counter. If the multiplied data is larger than the predetermined data, the multiplied data from the first super row is stored in the counter. If not, the image data from the second super row is stored. Other embodiments are also described.
    Type: Application
    Filed: February 3, 2012
    Publication date: April 11, 2013
    Applicant: OMNIVISION TECHNOLOGIES, INC.
    Inventors: Yaowu Mo, Chen Xu, Min Qu, Xiaodong Luo, Donghui Wu
  • Publication number: 20120283284
    Abstract: The present invention relates to pharmaceutical technical field, to melonine bisindole compounds, pharmaceutical compositions thereof, and preparation methods thereof. Specifically, the present invention relates to melonine bisindole compounds of Formula I, pharmaceutically acceptable salts thereof, pharmaceutical compositions comprising the compounds or pharmaceutically acceptable salts thereof. The present invention further relates to method for preparing the melonine bisindole compounds of Formula I or pharmaceutically acceptable salts thereof, and the use of the melonine bisindole compounds of Formula I or pharmaceutically acceptable salts thereof in the manufacture of a medicament for the treatment or prophylaxis of cancers.
    Type: Application
    Filed: November 4, 2010
    Publication date: November 8, 2012
    Applicant: Kunming Institute of Botany, The Chinese Academy of Sciences
    Inventors: Xiaodong Luo, Tao Feng, Yan Li, Yuanyuan Wang, Xianghai Cai, Yaping Liu
  • Publication number: 20120274808
    Abstract: Image overlay in a mobile device is described. In one embodiment an imaging system of a mobile communications device includes a first camera having a control interface to a controller and a data interface to the controller, a second camera having a data interface to the first camera, and a processor to combine an image from the second camera received through the second camera data interface with an image from the first camera and to send the combined image to the controller through the data interface.
    Type: Application
    Filed: April 26, 2011
    Publication date: November 1, 2012
    Inventors: Sheaufoong Chong, Xiaodong Luo
  • Publication number: 20120194735
    Abstract: An image sensor system and associated method supporting multiple video output standards, such as NTSC and PAL, including a pixel array corresponding in size to the frame size having a smaller line number of the video standards, is described. System and method for resolving discrepancies between standards includes multiple crystal oscillators or frequency synthesis to derive a dot clock, and a standard-specific pixel read-out scheme that provides additional lines when outputting according to the frame size having a larger line number of the video standards. In an embodiment, additional line video data is derived by duplicating a line of image data, and in an alternative embodiment additional line video data is derived by digital vertical interpolation.
    Type: Application
    Filed: June 11, 2010
    Publication date: August 2, 2012
    Applicant: OMINIVISION TECHNOLOGIES, INC.
    Inventor: Xiaodong Luo
  • Patent number: 8022994
    Abstract: An image sensor has an array of photo-sensitive pixels and supports a line-by-line read out of rows. In a normal resolution each row has the same nominal gain and exposure time. In a down-sampling mode the exposure times of the rows are varied according to an alternating sequence having at least two different exposure times. During down-sampling, raw pixel data from rows with different exposure times is combined to simultaneously achieve down-sampling and a high dynamic range.
    Type: Grant
    Filed: August 31, 2007
    Date of Patent: September 20, 2011
    Assignee: OmniVision Technologies, Inc.
    Inventors: Xiaodong Luo, Hongli Yang
  • Patent number: 7971687
    Abstract: An elevator load bearing assembly (20) includes a plurality of cords (22) within a jacket (24). The jacket has a plurality of grooves (32, 34, 36, 38 40) spaced along the length of the belt assembly. Each groove has a plurality of portions (50, 52, 54, 56) aligned at an oblique angle (A, B) relative to a longitudinal axis (48) of the belt (20). In one example, the grooves are separated such that there is no longitudinal overlap between adjacent grooves. In another example, transitions (60, 64) between the obliquely aligned portions are at different longitudinal positions on the belt. Another example includes a combination of the different longitudinal positions and the non-overlapping groove placement.
    Type: Grant
    Filed: February 7, 2003
    Date of Patent: July 5, 2011
    Assignees: Otis Elevator Company, ContiTech Antriebssysteme GmbH
    Inventors: Goldino Alves, Ary Mello, Xiaodong Luo, Bill Perron, Hugh O'Donnell, Paul von Hardenberg, Mark Marler, John Pitts, Randy Roberts, Hubert E. Goeser, Christoph Bederna
  • Patent number: 7748501
    Abstract: An elevator system design incorporates a belt having a jacket coating a plurality of elongate load bearing members such as steel cords. The jacket includes a plurality of spaced grooves on at least one side of the belt. The width of the grooves and the size of at least the drive sheave in the system are selected so that a ratio of the groove width to the sheave diameter is within a selected range. In one example, the ratio preferably is less than about 0.05. The grooves also preferably include a fillet at the edges of the grooves where the grooves meet with the sheave-engaging surface on the belt jacket.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: July 6, 2010
    Assignee: Otis Elevator Company
    Inventors: Mark E. Marler, Xiaodong Luo
  • Publication number: 20090109305
    Abstract: Embodiments of a process comprising receiving a plurality of offset analog signals, each corresponding to one of a plurality of black pixels in a pixel array; obtaining a corresponding digital value for each offset analog signal; computing an average of the digital values; and computing a black-level offset that, if applied to the digital values, would make the average of the digital values equal to a target value. Also disclosed are embodiments of an apparatus comprising an analog-to-digital converter coupled to an analog channel to receive offset analog black pixel signals from the analog channel and to obtain a corresponding digital value for each offset analog signal; circuitry and logic coupled to the analog-to-digital converter to average the digital values corresponding to the black pixels and compute a black-level offset that, if applied to the digital values of the black pixels, would make the average of the digital values of the black pixels equal to a target value.
    Type: Application
    Filed: October 31, 2007
    Publication date: April 30, 2009
    Inventors: Tiejun Dai, Xiaodong Luo, Xiangchen Xu
  • Publication number: 20090059048
    Abstract: An image sensor has an array of photo-sensitive pixels and supports a line-by-line read out of rows. In a normal resolution each row has the same nominal gain and exposure time. In a down-sampling mode the exposure times of the rows are varied according to an alternating sequence having at least two different exposure times. During down-sampling, raw pixel data from rows with different exposure times is combined to simultaneously achieve down-sampling and a high dynamic range.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 5, 2009
    Applicant: OMNIVISION TECHNOLOGIES, INC.
    Inventors: Xiaodong LUO, Hongli YANG
  • Publication number: 20080271957
    Abstract: An elevator door assembly (20) includes a single vane member (32) associated with a hoistway door (26). A magnetic device (36) on a car door (24) establishes a magnetic coupling with the vane member (32) to cause the hoistway door (26) to move with the car door (24) in at least two opposite directions. In a disclosed embodiment, a control (38) selectively powers the magnetic device (36), which comprises an electromagnet.
    Type: Application
    Filed: June 21, 2004
    Publication date: November 6, 2008
    Inventors: Bryan R. Siewert, Xiaodong Luo, Pei-Yuan Peng, Muhidin A. Lelic, Joseph Zacchio, Mark E. Renzulli, Michael Tracey, Thomas Malone
  • Patent number: 7430011
    Abstract: An image sensor formed on an integrated circuit is disclosed. The image sensor comprises an array of pixels including a plurality of bright pixels and a plurality of dark pixels. The image sensor also includes a dark exposure control circuit for controlling the exposure time of the plurality of dark pixels and a bright exposure control circuit for controlling the exposure time of the plurality of bright pixels.
    Type: Grant
    Filed: January 22, 2003
    Date of Patent: September 30, 2008
    Assignee: OmniVision Technologies, Inc.
    Inventors: Xiangchen Xu, Xiaodong Luo
  • Publication number: 20060175137
    Abstract: An elevator load bearing assembly (20) includes a plurality of cords (22) within a jacket (24). The jacket has a plurality of grooves (32, 34, 36, 38 40) spaced along the length of the belt assembly. Each groove has a plurality of portions (50, 52, 54, 56) aligned at an oblique angle (A, B) relative to a longitudinal axis (48) of the belt (20). In one example, the grooves are separated such that there is no longitudinal overlap between adjacent grooves. In another example, transitions (60, 64) between the obliquely aligned portions are at different longitudinal positions on the belt. Another example includes a combination of the different longitudinal positions and the non-overlapping groove placement.
    Type: Application
    Filed: February 7, 2003
    Publication date: August 10, 2006
    Inventors: Goldino Alves, Ary Mello, Xiaodong Luo, Bill Perron, Hugh O'Donnell, Paul Hardenberg, Mark Marler, John Pitts, Randy Roberts, Hubert Goeser, Christoph Bederna