Patents by Inventor Shen-Xiang Lin

Shen-Xiang Lin 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).

  • Patent number: 10257898
    Abstract: A LED driving apparatus including a power converter, a judging module and a control module is disclosed. The power converter and the judging module are coupled to at least one LED respectively. The control module is coupled to the judging module. The control module includes a current source and a transconductance amplifier. The current source is coupled to an output terminal of the transconductance amplifier. The power converter converts an input voltage into an output voltage and transmits the output voltage to the at least one LED. The judging module judges whether a LED current is changed from a first LED current value to a second LED current value. If yes, the judging module generates a judging signal to the control module. The control module changes a current value of the current source and a transconductance of the transconductance amplifier.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: April 9, 2019
    Assignee: Raydium Semiconductor Corporation
    Inventors: Hsuan-Hao Chien, Shen-Xiang Lin, Chih-Jen Hung
  • Patent number: 10143054
    Abstract: In a LED driver, a dimming control circuit receives a PWM signal and a clock signal and outputs a dimming signal and a sampling signal. A turn-on time of sampling signal is shorter than a cycle of clock signal. A first error amplifier receives a feedback voltage, a reference voltage and a dimming signal and outputs a compensating voltage. A second error amplifier receives the compensating voltage and a ramp signal and outputs a pulse voltage. A driving controller receives the dimming signal and pulse voltage and outputs a control signal. An output stage receives the control signal and an input voltage and generates an output voltage to LED strings. A minimum voltage selecting unit selects a minimum LED voltage. The first error amplifier receives the minimum LED voltage through the selectively conducted switch unit controlled by the sampling signal.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: November 27, 2018
    Assignee: DAZZO TECHONOLOGY CORPORATION
    Inventors: Shen-Xiang Lin, Hsuan-Hao Chien, Chih-Jen Hung
  • Publication number: 20180211588
    Abstract: A bias generation circuit coupled to a display panel is disclosed. The bias generation circuit includes a linear regulator, a charge pump and a synchronous dual mode boost DC-DC converter. The linear regulator and the charge pump are coupled to the display panel respectively. The synchronous dual mode boost DC-DC converter is selectively operated in a pulse width modulation mode or a pulse frequency modulation mode according to a control signal. In the pulse width modulation mode, the synchronous dual mode boost DC-DC converter controls the linear regulator to generate a first voltage signal to the display panel. In the pulse frequency modulation mode, the synchronous dual mode boost DC-DC converter controls the charge pump to generate a second voltage signal to the display panel.
    Type: Application
    Filed: January 25, 2018
    Publication date: July 26, 2018
    Inventors: Shen-Xiang LIN, Hsuan-Hao CHIEN, Chih-Jen HUNG
  • Publication number: 20180132323
    Abstract: A LED driving apparatus including a power converter, a judging module and a control module is disclosed. The power converter and the judging module are coupled to at least one LED respectively. The control module is coupled to the judging module. The control module includes a current source and a transconductance amplifier. The current source is coupled to an output terminal of the transconductance amplifier. The power converter converts an input voltage into an output voltage and transmits the output voltage to the at least one LED. The judging module judges whether a LED current is changed from a first LED current value to a second LED current value. If yes, the judging module generates a judging signal to the control module.
    Type: Application
    Filed: November 9, 2017
    Publication date: May 10, 2018
    Inventors: Hsuan-Hao CHIEN, Shen-Xiang LIN, Chih-Jen HUNG
  • Publication number: 20180132321
    Abstract: In a LED driver, a diming control circuit receives a PWM signal and a clock signal and outputs a dimming signal and a sampling signal. A turn-on time of sampling signal is shorter than a cycle of clock signal. A first error amplifier receives a feedback voltage, a reference voltage and a dimming signal and outputs a compensating voltage. A second error amplifier receives the compensating voltage and a ramp signal and outputs a pulse voltage. A driving controller receives the dimming signal and pulse voltage and outputs a control signal. An output stage receives the control signal and an input voltage and generates an output voltage to LED strings. A minimum voltage selecting unit selects a minimum LED voltage. The first error amplifier receives the minimum LED voltage through the selectively conducted switch unit controlled by the sampling signal.
    Type: Application
    Filed: November 9, 2017
    Publication date: May 10, 2018
    Inventors: Shen-Xiang LIN, Hsuan-Hao CHIEN, Chih-Jen HUNG
  • Publication number: 20040256546
    Abstract: A position-detecting device is provided. The optical position-detecting device essentially comprises a light-emitting source, a mask, and a light-detecting device, in which a plurality of grating-holes are provided on the mask for allowing of a projecting light source, generated by the light-emitting source, to pass therethrough, and the projecting light source passing through the grating-holes are then absorbed by a plurality of light-detecting element provided on the light-detecting device. Each light-detecting device is provided as a non-rectangular mode, while an interval space is existed between any two of adjacent light-detecting elements. The partially active area of one of the light-detecting elements is naturally provided at the vertical extension of the interval space, and thus diminishing disadvantages of misdetermination and low sensitivity of the light-detecting device induced by the presence of an interval space.
    Type: Application
    Filed: January 26, 2004
    Publication date: December 23, 2004
    Inventors: Chun-Fang Hsiao, Shen-Xiang Lin, Chih-Hsiung Shen, San-Bao Lin