Patents by Inventor Hsiu-Fen Yeh

Hsiu-Fen Yeh 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: 7605398
    Abstract: The present invention discloses an apparatus of high dynamic-range CMOS image sensor and method thereof. The present invention utilize a pixel circuit outputting an output signal, wherein the pixel circuit has a photodiode and a plurality of transistors; and utilize a current source as a charge supplement unit to supply current into one end of the photodiode, and providing charges to the parasitic capacitor of the photodiode to delay saturation in the pixel circuit. In addition, a feedback circuit can be further designed connecting the pixel circuit. The feedback circuit receives the output signal from the pixel circuit and then outputs a control signal according to the output signal of the pixel circuit to control status of the charge supplement unit, and thereby increasing the dynamic range of the CMOS image sensor.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: October 20, 2009
    Assignee: National Chung Cheng University
    Inventors: Oscal T.-C. Chen, Wei-Jean Liu, Hsiu-Fen Yeh
  • Publication number: 20090002533
    Abstract: The present invention discloses an apparatus of high dynamic-range CMOS image sensor and method thereof. The present invention utilize a pixel circuit outputting an output signal, wherein the pixel circuit has a photodiode and a plurality of transistors; and utilize a current source as a charge supplement unit to supply current into one end of the photodiode, and providing charges to the parasitic capacitor of the photodiode to delay saturation in the pixel circuit. In addition, a feedback circuit can be further designed connecting the pixel circuit. The feedback circuit receives the output signal from the pixel circuit and then outputs a control signal according to the output signal of the pixel circuit to control status of the charge supplement unit, and thereby increasing the dynamic range of the CMOS image sensor.
    Type: Application
    Filed: May 12, 2008
    Publication date: January 1, 2009
    Inventors: Oscal T.-C Chen, Wei-Jen Liu, Hsiu-Fen Yeh
  • Publication number: 20080241017
    Abstract: An electronic device including a control module and a filter. The electronic device generates a pernicious substance when the electronic device is operated. The control module controls the electronic device. The filter filters the pernicious substance.
    Type: Application
    Filed: November 27, 2007
    Publication date: October 2, 2008
    Applicant: BEYOND INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Chiu-Yuan Lin, Hsiu-Fen Yeh
  • Publication number: 20070046800
    Abstract: The present invention discloses an apparatus of high dynamic-range CMOS image sensor and method thereof. The present invention utilize a pixel circuit outputting an output signal, wherein the pixel circuit has a photodiode and a plurality of transistors; and utilize a current source as a charge supplement unit to supply current into one end of the photodiode, and providing charges to the parasitic capacitor of the photodiode to delay saturation in the pixel circuit. In addition, a feedback circuit can be further designed connecting the pixel circuit. The feedback circuit receives the output signal from the pixel circuit and then outputs a control signal according to the output signal of the pixel circuit to control status of the charge supplement unit, and thereby increasing the dynamic range of the CMOS image sensor.
    Type: Application
    Filed: August 26, 2005
    Publication date: March 1, 2007
    Inventors: Oscal Chen, Wei-Jean Liu, Hsiu-Fen Yeh