Patents by Inventor Chang-Ching Tsai

Chang-Ching Tsai 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).

  • Publication number: 20140078726
    Abstract: A LED lens assembly comprises a longitudinal rotationally symmetric inner surface contact to at least one LED and a longitudinal rotationally symmetric exterior surface exposure to the air. The half of the longitudinal cross section of the exterior surface constitutes at least three sections. One primary section bounds part of light by longitudinal total internal reflection, one secondary section reflects part of light by transverse total internal reflection and one tertiary section spreads light accordingly. The shape of each section includes straight or curved lines. The surface of each section includes micro structure of a smooth surface, a diffusive surface, a grating surface, a grooving surface, a surface of random gratings, an irregular grooving surface, a random scattering surface, or a surface of photonics crystal. The LED lens assembly further comprises one concave lens on top of the exterior surface.
    Type: Application
    Filed: September 15, 2012
    Publication date: March 20, 2014
    Inventor: Chang Ching Tsai
  • Publication number: 20130343046
    Abstract: A hallow light tube for LED lighting comprises an inner surface, an outer surface and at least one end surface. At least one LED is placed on at least one end surface to provide edge illumination. The rays emitting from edge LEDs are fed into the light tube along the longitudinal directions. The inner surface and the outer surface can be aligned in different ways to meet different lighting requirements. The inner, outer and end surfaces can be textured. The texture includes a smooth surface, a diffusive surface, a surface with micro structures, a surface with gratings, a surface with grooves, a random scattering surface, and a surface of photonics crystal.
    Type: Application
    Filed: June 22, 2012
    Publication date: December 26, 2013
    Inventor: Chang Ching Tsai
  • Patent number: 8115999
    Abstract: A polarizing lamp includes a polarization beam splitter, a metallic grating reflector having metallic gratings with a trapezoidal profile, and an unpolarized light source positioned between the polarization beam splitter and the metallic grating reflector.
    Type: Grant
    Filed: October 7, 2008
    Date of Patent: February 14, 2012
    Assignees: Chimei Innolux Corporation, University of Central Florida Research Foundation, Inc.
    Inventors: Chang-Ching Tsai, Shin-Tson Wu, Wang-Yang Li, Chung-Kuang Wei
  • Publication number: 20110216408
    Abstract: A linearly polarized light converter uses a polarization recycling mechanism for separating a first linearly polarized wave of an unpolarized wave that includes orthogonal first and second linearly polarized waves and that is produced by a light source. The linearly polarized light converter includes a polarized beam splitter adapted to be disposed on a first side of the light source for receiving the unpolarized wave, transmitting the first linearly polarized wave therethrough, and reflecting the second linearly polarized wave. A metallic reflector is adapted to be disposed on a second side of the light source that is opposite to the first side, and includes a metal layer and a plurality of metal particles distributed over the metal layer to cooperatively define a rough surface which converts the reflected second linearly polarized wave into an elliptical polarized wave and which reflects the elliptical polarized wave therefrom.
    Type: Application
    Filed: March 5, 2010
    Publication date: September 8, 2011
    Applicants: LITE-ON TECHNOLOGY CORP.
    Inventor: CHANG-CHING TSAI
  • Publication number: 20110110627
    Abstract: A device, method of collimating beam coming out from an optical tapered-core guided wave structure with change of index of refraction longitudinally along the axial direction of the tapered-core guided wave structure in the core or cladding region is proposed in this invention. The guided wave structure includes optical fibers and waveguides. The beam collimator in this invention is combined with light couplers and illuminating sources in applications to laser surgery, machinery, probing, measuring, weapons, imaging devices.
    Type: Application
    Filed: October 24, 2010
    Publication date: May 12, 2011
    Inventor: Chang Ching TSAI
  • Publication number: 20100085639
    Abstract: A polarizing lamp includes a polarization beam splitter, a metallic grating reflector having metallic gratings with a trapezoidal profile, and an unpolarized light source positioned between the polarization beam splitter and the metallic grating reflector.
    Type: Application
    Filed: October 7, 2008
    Publication date: April 8, 2010
    Inventors: Chang-Ching Tsai, Shin-Tson Wu, Wang-Yang Li, Chung-Kuang Wei
  • Patent number: 7583439
    Abstract: Apparatus and methods for a polarization converter comprising a polarization beam splitter for receiving an input light beam and allows a transverse magnetic to pass through the polarization beam splitter and reflects a transverse electric wave and a diffraction grating having a reflectivity and polarization convertible grating for receiving the transverse electric wave reflects back a reflected transverse electric wave having a polarization rotation. The broadband wide-angle polarization beam splitter can be alternative optical elements such as a prism or an optical device having multi-layered films.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: September 1, 2009
    Assignees: University of Central Florida Research Foundation, Inc., Chi Mei Optoelectronics Corp.
    Inventors: Chang-Ching Tsai, Shin-Tson Wu, Wang-Yang Li, Chung-Kuang Wei
  • Publication number: 20090040608
    Abstract: Apparatus and methods for a polarization converter comprising a polarization beam splitter for receiving an input light beam and allows a transverse magnetic to pass through the polarization beam splitter and reflects a transverse electric wave and a diffraction grating having a reflectivity and polarization convertible grating for receiving the transverse electric wave reflects back a reflected transverse electric wave having a polarization rotation. The broadband wide-angle polarization beam splitter can be alternative optical elements such as a prism or an optical device having multi-layered films.
    Type: Application
    Filed: August 9, 2007
    Publication date: February 12, 2009
    Applicants: CHI MEI OPTOELECTRONICS CORP., University of Central Florida Research Foundation, Inc.
    Inventors: Chang-Ching Tsai, Shin-Tson Wu, Wang-Yang Li, Chung-Kuang Wei
  • Patent number: D658313
    Type: Grant
    Filed: June 15, 2011
    Date of Patent: April 24, 2012
    Inventor: Chang Ching Tsai
  • Patent number: D689634
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: September 10, 2013
    Inventor: Chang Ching Tsai