Patents by Inventor Chengfeng Ruan

Chengfeng Ruan 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).

  • Method of controlling light adjustment
    Patent number: 11153944
    Abstract: A method of controlling light adjustment include activating a power supply; activating a digital control circuit to carry out an adjustment output voltage control mode, sense a signal from a light adjustment control switching circuit, and determine a light adjustment control mode; in response to an LED power source operating in the adjustment output voltage control mode, adjusting luminance from 100% to N % and continuously adjusting luminance from N % to ?0.01% wherein a 100% PWM signal output from a PWM driving signal circuit is unchanged, and a light adjustment signal collection circuit transmits a collected light adjustment signal having luminance between N % and ?0.01% to the digital control circuit; in response to the LED power source operating in a PWM adjustment control mode, adjusting luminance from 100% to N % and continuously adjusting luminance from N % to ?0.01%; and obtaining a light adjustment curve.
    Type: Grant
    Filed: January 20, 2021
    Date of Patent: October 19, 2021
    Assignee: Zhuhai Vofan Technology Co., Ltd
    Inventors: Guobiao Wen, Chuqiang Tan, Chengfeng Ruan
  • Method of controlling light adjustment
    Publication number: 20210144819
    Abstract: A method of controlling light adjustment include activating a power supply; activating a digital control circuit to carry out an adjustment output voltage control mode, sense a signal from a light adjustment control switching circuit, and determine a light adjustment control mode; in response to an LED power source operating in the adjustment output voltage control mode, adjusting luminance from 100% to N % and continuously adjusting luminance from N % to ?0.01% wherein a 100% PWM signal output from a PWM driving signal circuit is unchanged, and a light adjustment signal collection circuit transmits a collected light adjustment signal having luminance between N % and ?0.01% to the digital control circuit; in response to the LED power source operating in a PWM adjustment control mode, adjusting luminance from 100% to N % and continuously adjusting luminance from N % to ?0.01%; and obtaining a light adjustment curve.
    Type: Application
    Filed: January 20, 2021
    Publication date: May 13, 2021
    Inventors: Guobiao Wen, Chuqiang Tan, Chengfeng Ruan