Patents Assigned to Bell Ceramics Co., Ltd.
  • Patent number: 10604700
    Abstract: A method for manufacturing a nitride phosphor is provided. The method comprises providing a nitride phosphor formulation and subjecting the nitride phosphor formulation to a hot isostatic pressing step. The nitride phosphor formulation comprises a flux and a phosphor precursor, wherein the flux is a barium-containing nitride. The phosphor precursor comprises two or more metal nitrides, and wherein a plurality of metal elements are present in the nitride phosphor and the two or more metal nitrides contain the plurality of metal elements.
    Type: Grant
    Filed: November 1, 2017
    Date of Patent: March 31, 2020
    Assignee: BELL CERAMICS CO., LTD.
    Inventors: Chang-Lung Chiang, Mu-Huai Fang, Chia-Shen Hsu, Ru-Shi Liu, Chaochin Su, Te-Hsin Chiang
  • Patent number: 8836207
    Abstract: A fluorescent layer, its preparation method and uses are provided. The fluorescent layer is provided from a fluorescent material and a calcining material. The fluorescent material is in an amount ranging from about 5 wt % to about 95 wt % based on the total weight of the fluorescent layer. The fluorescent layer of the present invention can be used in a light-emitting diode to change the color of emitting-light and improve the heat dissipation of the light-emitting diode. Furthermore, the fluorescent layer of the present invention is free of an organic resin, and thus, does not have the problem of aging (etiolation). The final product has a stable, lasting and durable luminescent quality.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: September 16, 2014
    Assignee: Bell Ceramics Co., Ltd.
    Inventors: Te-Hsin Chiang, Ru-Shi Liu, Der-Shing Chiang, Chang-Yang Chiang