Patents by Inventor Hyun-Won CHA

Hyun-Won CHA 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).

  • Passive optical network-based video overlay pluggable type optical network device
    Patent number: 10591683
    Abstract: The present invention relates generally to a passive optical network (PON)-based video overlay pluggable type optical network device that is easily connected and detached from an indoor optical network terminal (ONT) at a subscriber side, which transmits and receives an optical signal in which a video RF optical signal and a PON optical signal are overlaid, wherein a PON board for receiving and processing the PON optical signals and a video RF board for receiving and processing the video RF optical signals are easily removed for replacement from a housing including an optical sub-assembly (OSA), which separates the PON optical signal and the video RF optical signal, and the PON board and the video RF board are individually designed and configured in a removable manner so that interference between the signals is minimized and selective combinations and production are possible according to various types of PONs and video services.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: March 17, 2020
    Assignee: LIGHTRON FIGER-OPTIC DEVICES INC.
    Inventors: Hyun-Won Cha, Keun-Jae Park, Jeong-Hwan Cho, Oh-Sang Kwon, Hyun-Jong Youm, Seong-Seok Seo, Young-Un Heo
  • PASSIVE OPTICAL NETWORK-BASED VIDEO OVERLAY PLUGGABLE TYPE OPTICAL NETWORK DEVICE
    Publication number: 20190324219
    Abstract: The present invention relates generally to a passive optical network (PON)-based video overlay pluggable type optical network device that is easily connected and detached from an indoor optical network terminal (ONT) at a subscriber side, which transmits and receives an optical signal in which a video RF optical signal and a PON optical signal are overlaid, wherein a PON board for receiving and processing the PON optical signals and a video RF board for receiving and processing the video RF optical signals are easily removed for replacement from a housing including an optical sub-assembly (OSA), which separates the PON optical signal and the video RF optical signal, and the PON board and the video RF board are individually designed and configured in a removable manner so that interference between the signals is minimized and selective combinations and production are possible according to various types of PONs and video services.
    Type: Application
    Filed: November 20, 2018
    Publication date: October 24, 2019
    Applicant: LIGHTRON FIBER-OPTIC DEVICES INC.
    Inventors: Hyun-Won CHA, Keun-Jae PARK, Jeong-Hwan CHO, Oh-Sang KWON, Hyun-Jong YOUM, Seong-Seok SEO, Young-Un HEO