Patents by Inventor Chen-Hung Chew

Chen-Hung Chew 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).

  • High efficiency liquid crystal display projection system
    Patent number: 7589797
    Abstract: A transmitting-type liquid crystal display projection system including a planar light source which emits planar white beam or planar R/G/B beams in succession is provided. A first polarization filter receives the planar light source and polarizes the same to be in a first polarization state. A liquid-crystal light valve receives the polarized planar light source, and converts the first polarization state to a second polarization state having a corresponding gray level. A second polarization filter receives a light output from the liquid crystal light valve to produce a second polarization light beam. A projection unit projects the second polarization light beam onto a display plane. Using the same planar light source, a polarization beam splitting (PBS) device with a refection-type liquid crystal light valve can be used to achieve the reflection-type projection system.
    Type: Grant
    Filed: July 13, 2007
    Date of Patent: September 15, 2009
    Assignee: Industrial Technology Research Institute
    Inventors: Ra-Min Tain, Chun-Chuan Lin, Wei-Kuo Han, Je-Ping Hu, Chen-Hung Chew
  • HIGH EFFICIENCY LIQUID CRYSTAL DISPLAY PROJECTION SYSTEM
    Publication number: 20070258018
    Abstract: A transmitting-type liquid crystal display projection system including a planar light source which emits planar white beam or planar R/G/B beams in succession is provided. A first polarization filter receives the planar light source and polarizes the same to be in a first polarization state. A liquid-crystal light valve receives the polarized planar light source, and converts the first polarization state to a second polarization state having a corresponding gray level. A second polarization filter receives a light output from the liquid crystal light valve to produce a second polarization light beam. A projection unit projects the second polarization light beam onto a display plane. Using the same planar light source, a polarization beam splitting (PBS) device with a refection-type liquid crystal light valve can be used to achieve the reflection-type projection system.
    Type: Application
    Filed: July 13, 2007
    Publication date: November 8, 2007
    Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Ra-Min Tain, Chun-Chuan Lin, Wei-Kuo Han, Je-Ping Hu, Chen-Hung Chew