Patents by Inventor Yau-Zen Chang

Yau-Zen Chang 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: 8298245
    Abstract: A three-dimensional positioning device for minimally invasive surgery includes a base, two angle adjustable assemblies, an arc, a sliding assembly, a first positioning assembly, a second positioning assembly and a third positioning assembly. The base includes two first frames and two second frames. Two ends of each second frame are connected to the first frames respectively. Each first frame has a pivotal member. The angle adjustable assemblies are pivotably connected to the pivotal member of the first frame respectively. The arc includes a hollow track member. The angle adjustable assemblies are connected to two ends of the arc. The sliding assembly is mounted on the track member of the arc according to a predetermined position of a nidus. Therefore, the three-dimensional positioning device can effectively improve precision and operation more precisely in minimally invasive surgery to increase surgery success rate.
    Type: Grant
    Filed: August 17, 2009
    Date of Patent: October 30, 2012
    Assignee: Chang Gung University
    Inventors: Shih-Tseng Li, Yau-Zen Chang, Heng-Liang Liu, Shun-Chung Chuang
  • Patent number: 8229167
    Abstract: The present invention discloses an optical tracking device and a positioning method thereof. The optical tracking device comprises several light-emitting units, several image tracking units, an image processing unit, an analysis unit, and a calculation unit. First, the light-emitting units are correspondingly disposed on a carrier in geometric distribution and provide light sources. Secondly, the image tracking units track the plurality of light sources and capture images. The images are subjected to image processing by the image processing unit to obtain light source images corresponding to the light sources from each image. Then the analysis unit analyzes the light source images to obtain positions and colors corresponding to the light-emitting units. Lastly, the calculation unit establishes three-dimensional coordinates corresponding to the light-emitting units based on the positions and colors and calculates the position of the carrier based on the three-dimensional coordinates.
    Type: Grant
    Filed: January 19, 2010
    Date of Patent: July 24, 2012
    Assignee: Chang-Gung University
    Inventors: Shih-Tseng Lee, Yau-Zen Chang, Chan-Peng Lo
  • Publication number: 20110144748
    Abstract: A structure of breast augmentation pocket comprises a biocompatible liquid pocket, wherein a biocompatible liquid and a plurality of hollow silicone gel particles in the forms of large, small circles, or various shapes are filled inside. The silicone gel is applied with colors to form recognizable silicone gel such that the silicone gel particles are readily recognized and then cleaned away in case of rupture of the biocompatible liquid pocket. The silicone gel particles are hollow with the same average density as that of the biocompatible liquid so as to be suspended in the biocompatible liquid, whereby a touch feeling more similar to that of real tissue is provided because of the combination of biocompatible liquid with silicone gel particles. With good biocompatibility with non-dissolvability, the silicone gel particles neither lead to immune reactions nor cause any possible sequelae.
    Type: Application
    Filed: December 15, 2009
    Publication date: June 16, 2011
    Applicant: CHANG GUNG UNIVERSITY
    Inventors: YAU-ZEN CHANG, MOU-CHUAN LIU
  • Publication number: 20110064270
    Abstract: The present invention discloses an optical tracking device and a positioning method thereof. The optical tracking device comprises several light-emitting units, several image tracking units, an image processing unit, an analysis unit, and a calculation unit. First, the light-emitting units are correspondingly disposed on a carrier in geometric distribution and provide light sources. Secondly, the image tracking units track the plurality of light sources and capture images. The images are subjected to image processing by the image processing unit to obtain light source images corresponding to the light sources from each image. Then the analysis unit analyzes the light source images to obtain positions and colors corresponding to the light-emitting units. Lastly, the calculation unit establishes three-dimensional coordinates corresponding to the light-emitting units based on the positions and colors and calculates the position of the carrier based on the three-dimensional coordinates.
    Type: Application
    Filed: January 19, 2010
    Publication date: March 17, 2011
    Applicant: CHANG-GUNG UNIVERSITY
    Inventors: Shih-Tseng Lee, Yau-Zen Chang, Chan-Peng Lo
  • Publication number: 20110040304
    Abstract: A three-dimensional positioning device for minimally invasive surgery comprising: a base, two angle adjustable assemblies, an arc, a sliding assembly, a first positioning assembly, a second positioning assembly and a third positioning assembly. The base includes two first frames and two second frames. Two ends of each second frame connected to the first frames respectively. Each first frame has a pivotal member. The angle adjustable assemblies are pivotably connected to the pivotal member of the first frame respectively. The arc includes a hollow track member. The angle adjustable assemblies are connected to two ends of the arc. The sliding assembly is mounted on the track member of the arc according to a predetermined position of a nidus. Therefore, the three-dimensional positioning device can effectively improve the precision and operate more precisely in the minimally invasive surgery to increase the surgery success rate.
    Type: Application
    Filed: August 17, 2009
    Publication date: February 17, 2011
    Inventors: Shih-Tseng Li, Yau-Zen Chang, Heng-Liang Liu, Shun-Chung Chuang