Patents by Inventor Takeshi WARAGAWA

Takeshi WARAGAWA 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).

  • Semiconductor light emitting device having an optical plate including a meniscus control structure and method of manufacturing
    Patent number: 8455907
    Abstract: A semiconductor light-emitting device and a method for manufacturing the same can include a wavelength converting layer in order to emit various colored lights including white light. The semiconductor light-emitting device can include a base board, a frame located on the base board, at least one light-emitting chip mounted on the base board, the wavelength converting layer located between an optical plate and each outside surface of the chips so as to extend toward the optical plate using a meniscus control structure, and a reflective material layer disposed at least between the frame and both side surfaces of the wavelength converting layer and the optical plate. The semiconductor light-emitting device can be configured to improve light-emitting efficiency and color variability between the light-emitting chips by using the reflective material layer as each reflector, and therefore can emit a wavelength-converted light having a high light-emitting efficiency from various small light-emitting surfaces.
    Type: Grant
    Filed: December 13, 2011
    Date of Patent: June 4, 2013
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Takeshi Waragawa, Kosaburo Ito
  • SEMICONDUCTOR LIGHT EMITTING DEVICE AND MANUFACTURING METHOD
    Publication number: 20120140506
    Abstract: A semiconductor light-emitting device and a method for manufacturing the same can include a wavelength converting layer in order to emit various colored lights including white light. The semiconductor light-emitting device can include a base board, a frame located on the base board, at least one light-emitting chip mounted on the base board, the wavelength converting layer located between an optical plate and each outside surface of the chips so as to extend toward the optical plate using a meniscus control structure, and a reflective material layer disposed at least between the frame and both side surfaces of the wavelength converting layer and the optical plate. The semiconductor light-emitting device can be configured to improve light-emitting efficiency and color variability between the light-emitting chips by using the reflective material layer as each reflector, and therefore can emit a wavelength-converted light having a high light-emitting efficiency from various small light-emitting surfaces.
    Type: Application
    Filed: December 13, 2011
    Publication date: June 7, 2012
    Inventors: Takeshi WARAGAWA, Kosaburo Ito