Patents by Inventor Stephen Chan

Stephen Chan 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: 20170310218
    Abstract: A slim and cost effective power module solution derived from the multiple-phase buck converter technology that addresses the problems of inductor thickness and excessive magnetic material use. Such power module solution utilizes a multi-phase constant current topology and a corresponding electronic controller to provide a constant current source for various OLED lighting applications. The multi-phase constant current topology comprises two or more inductor-flyback diode feedback loops. Each inductor-flyback diode feedback loop is triggered ON and OFF out-of-phase by a current controller, which senses and estimates the average current supplied to the load, and causes the adjustments to the average current supplied to the load by controlling the ON duration of the inductor-flyback diode feedback loops.
    Type: Application
    Filed: April 26, 2017
    Publication date: October 26, 2017
    Inventors: Wing Chi Stephen CHAN, Siu Hong LUI, Sing NG, Hon Sheung LIU, Xiacong LIU, Johnkid LO, Rong GAO
  • Publication number: 20170269779
    Abstract: A capacitive sensing method comprising: driving a first excitation signal onto a sensor electrode, and driving a second excitation signal onto the embedded electrodes. Either the first or the second excitation signal has voltage oscillations of constant first amplitude, while the other has voltage oscillations of varying second amplitude. The second amplitude varies between a high amplitude value that is larger than the first amplitude by an amplitude difference and a low amplitude value that is smaller than the first amplitude by the same amplitude difference. The method further comprises using one or more integrators to integrate an electric current due to combined voltage oscillations of the first and the second excitation signals within an integration cycle, and generate an integrated signal for detecting a capacitive change on the sensor electrode; wherein the integration cycle comprises a plurality of voltage oscillations of the first and the second excitation signals.
    Type: Application
    Filed: June 7, 2016
    Publication date: September 21, 2017
    Inventors: Wing Chi Stephen Chan, Jun Chen, Sing Ng
  • Patent number: 9689539
    Abstract: The invention discloses an LED fluorescent lamp, comprising a base plate, an end cap, an aluminum profile, a light diffusing plate, a light guide plate component, a lamp shade, a power unit and a lamp panel component as well as an LED lamp bead on the lamp panel component; first slots are arranged on two left side walls of the aluminum profile; the light guide plate can rotationally sleeved in the first slots; the top of the lamp shade is provided with a holding groove, at the bottom of which a hollowed-out part is hollowed out; the light diffusing plate is fixed in the holding groove and provided with many stripes on the surface; the stripes are crossed to form diamond-shaped stripes; and two sides of the lamp shade are arcs. The invention has the advantages of high thermal radiation effect, soft light and better light-emitting angle.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: June 27, 2017
    Inventors: Lap Wah Lin, Sek Lun Stephen Chan
  • Publication number: 20170073998
    Abstract: A barrier latch assembly having a housing including a first locking element, a second locking element, a trigger and a swing plate. The swing plate is coupled to the trigger and to the first and second locking elements. When the trigger is depressed, the swing plate pivots from an unlock position to a lock position over a rear side of the first and second locking element thereby blocking and preventing the first and second locking elements from being depressed inward.
    Type: Application
    Filed: July 18, 2016
    Publication date: March 16, 2017
    Inventors: Ruth Hsin-Ju FANG, Thomas Birkert, Stephen Kong, Stephen Chan
  • Publication number: 20170024036
    Abstract: Driving a touch-sensing-enabled active matrix LCD display panel for enhancing touch sensing by reducing parasitic capacitances is considered. In one embodiment, a plurality of driving voltages is generated. The driving voltages include a common voltage, and a first and a second gate-drive reference voltages for configuring a thin film transistor (TFT) in the panel to switch on and off, respectively. When the panel is operated in a sensing mode, the common voltage that is generated includes a pulse-train waveform. Furthermore, each of the first and the second gate-drive reference voltages is substantially time-synchronized to and includes the pulse-train waveform of the common voltage during the sensing mode. In one option, the driving voltages further include a sensing-mode source-drive voltage acting as a source-drive signal for the TFT during the sensing mode. The sensing-mode source-drive voltage is substantially time-synchronized to and includes the pulse-train waveform of the common voltage.
    Type: Application
    Filed: July 24, 2015
    Publication date: January 26, 2017
    Inventors: Jun CHEN, Cheung Fai LEE, Yiu Sang LEI, Wing Chi Stephen CHAN
  • Publication number: 20160364354
    Abstract: A system for communicating with a plurality of serially connected devices includes: a link master connected with one of the devices; a plurality of devices serially connected with one another, each device including: a first input port, a first output port, a switch connecting the first input port and the first output port, and a command decoder connected with the switch and configured to recognize different commands from the link master and close or open the switch accordingly; and an ID register configured to store the ID being assigned by a link master. The link master is configured to assign ID to each one of the devices in sequence, and to access any one of the devices directly for read or write by providing the assigned ID to all devices in parallel. A method for communicating with a plurality of serially connected devices is also provided.
    Type: Application
    Filed: June 18, 2015
    Publication date: December 15, 2016
    Inventors: Feng Lin, Wing Chi Stephen Chan, Yu Zhang, Wai Kwong Lee
  • Publication number: 20160305616
    Abstract: The invention discloses an LED fluorescent lamp, comprising a base plate, an end cap, an aluminum profile, a light diffusing plate, a light guide plate component, a lamp shade, a power unit and a lamp panel component as well as an LED lamp bead on the lamp panel component; first slots are arranged on two left side walls of the aluminum profile; the light guide plate can rotationally sleeved in the first slots; the top of the lamp shade is provided with a holding groove, at the bottom of which a hollowed-out part is hollowed out; the light diffusing plate is fixed in the holding groove and provided with many stripes on the surface; the stripes are crossed to form diamond-shaped stripes; and two sides of the lamp shade are arcs. The invention has the advantages of high thermal radiation effect, soft light and better light-emitting angle.
    Type: Application
    Filed: April 17, 2015
    Publication date: October 20, 2016
    Inventors: LAP WAH LIN, SEK LUN STEPHEN CHAN
  • Publication number: 20160234582
    Abstract: The present invention is related to redundancy within a passive optical network and may include a first optical line terminal (OLT), a second optical line terminal, a first optical networking terminal (ONT) including an optical port and at least one Ethernet port; and a first two-to-many passive optical splitter. In operation, the first ONT may be registered with the first OLT and the second OLT may have the transmit function of the first optical port turned off. The receive function of the first optical port on the second OLT may be turned on and may be listening to the communication between the first OLT and the first ONT. When the second OLT no longer receives a signal indicating that the first OLT is still registered with the first ONT, the second OLT may turn on the receive function of the first optical port and registers with the first ONT.
    Type: Application
    Filed: February 10, 2016
    Publication date: August 11, 2016
    Inventors: Daniel Ronald, Byron Thom, Stephen Chan, Nine Siong Lam Hang, Pook-Ping Yao
  • Patent number: 9210390
    Abstract: A poly-phase frame modulation system includes a phase matrix look-up table being configured for generating a reference phase matrix; a first phase modulator being configured for generating a first modulated output by taking in the data from a red channel and the sum of the reference phase matrix and a frame offset; a second phase modulator being configured for generating a second modulated output by taking in the data from a green channel and the sum of the reference phase matrix, the frame offset and a first channel offset; and a third phase modulator being configured for generating a third modulated output by taking in the data from a blue channel and the sum of the reference phase matrix, the frame offset and a second channel offset.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: December 8, 2015
    Assignee: SOLOMON SYSTECH LIMITED
    Inventors: Wing Chi Stephen Chan, Wai Kin Cheng
  • Publication number: 20150029212
    Abstract: A poly-phase frame modulation system includes a phase matrix look-up table being configured for generating a reference phase matrix; a first phase modulator being configured for generating a first modulated output by taking in the data from a red channel and the sum of the reference phase matrix and a frame offset; a second phase modulator being configured for generating a second modulated output by taking in the data from a green channel and the sum of the reference phase matrix, the frame offset and a first channel offset; and a third phase modulator being configured for generating a third modulated output by taking in the data from a blue channel and the sum of the reference phase matrix, the frame offset and a second channel offset.
    Type: Application
    Filed: August 5, 2013
    Publication date: January 29, 2015
    Applicant: Solomon Systech Limited
    Inventors: Wing Chi Stephen CHAN, Wai Kin CHENG
  • Publication number: 20150029131
    Abstract: A method is provided for recognizing touches by at least a finger on a touch panel and determining positions of the touches by analyzing a change in capacitance of electrodes of the touch panel. The change in capacitance is represented as at least an array. A digital signal processing unit and a touch panel that implement the method are also provided.
    Type: Application
    Filed: August 5, 2013
    Publication date: January 29, 2015
    Applicant: Solomon Systech Limited
    Inventors: Wai Kin CHENG, Wing Chi Stephen CHAN, Wai Pak CHOI
  • Patent number: 8751459
    Abstract: Website and newsletter operators may only have users' email addresses but not their person names. It can be beneficial for such operators to derive additional information about the email address owners so they can improve their services. However, there is no easy way to retrieve owners' information based on only email addresses. The present disclosure provides information such as the owners' names, professional profiles and aggregated statistics with only a list of email addresses as the input.
    Type: Grant
    Filed: May 24, 2012
    Date of Patent: June 10, 2014
    Assignee: App Tsunami, Inc.
    Inventors: Stephen Chan, Edbert Chan
  • Patent number: 8740032
    Abstract: An electric stapler (10) is disclosed as including a stapling head (12) with a driver (28), an intermediate magazine (14) for carrying staples each with two legs, a base part (16) carrying two anvils (44), cams (24), and eccentrically mounted wheels (52), in which the stapling head (12), intermediate magazine (14) and base part (16) are movable relative to one another, the eccentrically mounted wheels (52) are rotatable to move the stapling head (12) and intermediate magazine (14) relative to each other and relative to the base part (16) whereby the driver (28) of the stapling head (12) drives a staple away from the magazine (14), and the cams (24) are rotatable to move a movement transmission assembly (30) to move the anvils (44) to bend the legs of the staple.
    Type: Grant
    Filed: January 13, 2011
    Date of Patent: June 3, 2014
    Assignee: Lee Tack Stationary Manufactory Limited
    Inventor: Kwok Ki Stephen Chan
  • Patent number: 8640587
    Abstract: A hand-operated cutting apparatus including a main frame at least including a front wall, a base wall and two side walls, in which an opening is formed in the front wall, and a rack formed on an upper surface of the base wall along the length of the main frame, a bracket disposed between the side walls of the main frame and movable along the length of the main frame, a cutter provided in the front of the main frame and including a cutting blade located within the opening, and a squeezer attached to the front surface of the bracket facing to the cutter. The bracket includes a base, a handle pivotally provided on the base and a pusher arm pivotally provided on the handle, in which a lower end of the pusher arm is located between two teeth of the rack, and the pivot axis of the pusher arm on the handle departs from the pivot axis of the handle on the base towards the rear of the main frame.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: February 4, 2014
    Assignee: Cosso International Ltd.
    Inventors: Yiu Joe Cheung, Chung Wai Stephen Chan
  • Publication number: 20140010445
    Abstract: A method for compressing image data into a sequence of codes, the image data being represented by a plurality of input color vectors. The method includes a repetitive processing of one color vector at a time with the following steps: receiving one of the input color vectors; comparing the received input color vector with codebook words in a codebook, the codebook words being expressed as color vectors: compressing the received input color vector to generate a code based on the comparison; updating the codebook with a color vector, the color vector being generated by decoding the code; and outputting the code before receiving a next one of the input color vectors; wherein the updating may include rearranging the order of the codebook words based on the comparison.
    Type: Application
    Filed: September 4, 2013
    Publication date: January 9, 2014
    Applicant: SOLOMON SYSTECH LIMITED
    Inventors: Wing Chi Stephen CHAN, Wai Pak Icarus CHOI
  • Publication number: 20130318098
    Abstract: Website and newsletter operators may only have users' email addresses but not their person names. It can be beneficial for such operators to derive additional information about the email address owners so they can improve their services. However, there is no easy way to retrieve owners' information based on only email addresses. The present disclosure provides information such as the owners' names, professional profiles and aggregated statistics with only a list of email addresses as the input.
    Type: Application
    Filed: May 24, 2012
    Publication date: November 28, 2013
    Inventors: Stephen Chan, Edbert Chan
  • Publication number: 20130268420
    Abstract: Methods and systems for real-time, interactive solutioning and visualization of working capital for an enterprise employ a processor coupled to memory and other computer hardware and software components for storing fixed data consisting at least in part of information regarding financial institution products and information regarding governmental regulations; storing variable data consisting at least in part of information regarding operations of the enterprise; receiving variable data interactively consisting at least in part of information regarding enterprise preferences; and generating at least one recommendation for a proposed structure for the enterprise based at least in part on the fixed data and the variable data.
    Type: Application
    Filed: April 5, 2013
    Publication date: October 10, 2013
    Applicant: Citigroup Technology, Inc.
    Inventors: Shi Wei Ong, E May Neoh, Stephen Chan, Keng Mun Lee, Kwan Hoon Park, Andrew Kehoe, Alfonso Martin, Anthony Nappi, Geraldine Yip, Dianne Challenor, Sudeep Yadav, Gourang Shah, Philippe Jaccard, Jason Batman, Mike David, Danielle Johnson, Peter Williams, Elizabeth Towler, Gary Greenwald, Yogesh Ajinkya, Sabiha Kazi
  • Patent number: 8471501
    Abstract: An illumination brightness control apparatus receives an input voltage from a light dimmer and produces a control signal to regulate a drive signal to a power conversion switch of a switching mode power converter. The apparatus includes a voltage conditioning circuit to condition the dimmer input voltage to provide a conditioned voltage signal; an ADC circuit to sample analog data of the conditioned voltage signal at a sampling rate that is high relative to a nominal variation rate of the dimmer input voltage and to provide digital data corresponding to the sampled analog data; a digital signal processing circuit to produce a running data average of the digital data; and a controller to produce a signal corresponding to the running data average as the control signal to regulate the drive signal.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: June 25, 2013
    Assignee: Solomon Systech Limited
    Inventors: Wing Chi Stephen Chan, Hing Mo Jeff Lam, Jun Pan, Stephen Wai-Yan Lai, Xiaolong He, Wai Kin Josh Cheng
  • Patent number: 8314779
    Abstract: A controller for detection of touches by a single finger or multiple fingers on a touch panel, the touch panel including a first group of electrodes arranged in a first direction and a second group of electrodes arranged in a second direction, thereby forming a plurality of crossover points.
    Type: Grant
    Filed: February 23, 2009
    Date of Patent: November 20, 2012
    Assignee: Solomon Systech Limited
    Inventors: Wing Chi Stephen Chan, Wai Pak Choi, Wai Kin Cheng, Kwok Wah Chu, Siu Hong Lui, Yao Lu, Wai Hon Ng
  • Publication number: 20120212145
    Abstract: An illumination brightness control apparatus receives an input voltage from a light dimmer and produces a control signal to regulate a drive signal to a power conversion switch of a switching mode power converter. The apparatus includes a voltage conditioning circuit to condition the dimmer input voltage to provide a conditioned voltage signal; an ADC circuit to sample analog data of the conditioned voltage signal at a sampling rate that is high relative to a nominal variation rate of the dimmer input voltage and to provide digital data corresponding to the sampled analog data; a digital signal processing circuit to produce a running data average of the digital data; and a controller to produce a signal corresponding to the running data average as the control signal to regulate the drive signal.
    Type: Application
    Filed: February 22, 2011
    Publication date: August 23, 2012
    Inventors: Wing Chi Stephen CHAN, Hing Mo Jeff Lam, Jun Pan, Stephen Wai-Yan Lai, Xiaolong He, Wai Kin Josh Cheng