Title:
FLUORESCENT MATERIAL FOR DISPLAY UNIT, PROCESS FOR PRODUCING THE SAME AND COLOR DISPLAY UNIT INCLUDING THE SAME
Document Type and Number:
WIPO Patent Application WO/2004/031322
Kind Code:
A1
Abstract:
Fluorescent material for display unit (1) comprising fluorescent material matrix grains (2) constituted substantially of zinc sulfide of crystal structure composed mainly of, for example, hexagonal crystal or cubic crystal. First activator (3) is localized in surface layer part (2a) of the fluorescent material matrix grains (2). Second activator is uniformly dispersed in the fluorescent material matrix grains (2). The color of light emitted from a fluorescent material of zinc sulfide having a crystal structure of, for example, hexagonal crystal can be improved by such a grain structure. Alternatively, unwanted light emission attributed to electron beams on the low voltage side of the fluorescent material for display unit (1) can be suppressed.
Inventors:
Yamaguchi, Kenichi c/o Intellectual, Property Division (Toshiba Corporation 1-1, Shibaura 1-chom, Minato-ku Tokyo, 105-8001, JP)
Inamura, Masaaki c/o Intellectual, Property Division (Toshiba Corporation 1-1, Shibaura 1-chom, Minato-ku Tokyo, 105-8001, JP)
Ito, Takeo c/o Intellectual, Property Division (Toshiba Corporation 1-1, Shibaura 1-chom, Minato-ku Tokyo, 105-8001, JP)
Matsuura, Susumu (497-3, Naganuma-cho Sakae-k, Yokohama-shi Kanagawa, 244-0841, JP)
Inamura, Masaaki c/o Intellectual, Property Division (Toshiba Corporation 1-1, Shibaura 1-chom, Minato-ku Tokyo, 105-8001, JP)
Ito, Takeo c/o Intellectual, Property Division (Toshiba Corporation 1-1, Shibaura 1-chom, Minato-ku Tokyo, 105-8001, JP)
Matsuura, Susumu (497-3, Naganuma-cho Sakae-k, Yokohama-shi Kanagawa, 244-0841, JP)
Application Number:
PCT/JP2003/012285
Publication Date:
April 15, 2004
Filing Date:
September 26, 2003
Export Citation:
Assignee:
KABUSHIKI KAISHA TOSHIBA (1-1 Shibaura 1-chome, Minato-ku, Tokyo, 105-8001, JP)
Yamaguchi, Kenichi c/o Intellectual, Property Division (Toshiba Corporation 1-1, Shibaura 1-chom, Minato-ku Tokyo, 105-8001, JP)
Inamura, Masaaki c/o Intellectual, Property Division (Toshiba Corporation 1-1, Shibaura 1-chom, Minato-ku Tokyo, 105-8001, JP)
Ito, Takeo c/o Intellectual, Property Division (Toshiba Corporation 1-1, Shibaura 1-chom, Minato-ku Tokyo, 105-8001, JP)
Matsuura, Susumu (497-3, Naganuma-cho Sakae-k, Yokohama-shi Kanagawa, 244-0841, JP)
Yamaguchi, Kenichi c/o Intellectual, Property Division (Toshiba Corporation 1-1, Shibaura 1-chom, Minato-ku Tokyo, 105-8001, JP)
Inamura, Masaaki c/o Intellectual, Property Division (Toshiba Corporation 1-1, Shibaura 1-chom, Minato-ku Tokyo, 105-8001, JP)
Ito, Takeo c/o Intellectual, Property Division (Toshiba Corporation 1-1, Shibaura 1-chom, Minato-ku Tokyo, 105-8001, JP)
Matsuura, Susumu (497-3, Naganuma-cho Sakae-k, Yokohama-shi Kanagawa, 244-0841, JP)
International Classes:
C09K11/58; C09K11/64; H01J1/63; C09K11/58; C09K11/64; H01J1/00; (IPC1-7): C09K11/08; C09K11/56; H01J29/20; H01J31/12
Attorney, Agent or Firm:
Suyama, Saichi (Kanda Higashiyama Bldg, 1 Kandata-cho 2-chom, Chiyoda-ku Tokyo, 101-0046, JP)
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