Patents by Inventor Hing Mo Jeff Lam

Hing Mo Jeff Lam 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).

  • Illumination brightness control apparatus and method
    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
  • ILLUMINATION BRIGHTNESS CONTROL APPARATUS AND METHOD
    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