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AC TFEL device having a white light emitting multilayer phosphor

  • US 5,598,059 A
  • Filed: 04/19/1995
  • Issued: 01/28/1997
  • Est. Priority Date: 04/28/1994
  • Status: Expired due to Term
First Claim
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1. An AC thin film electroluminescent (TFEL) device including a plurality of phosphor layers for forming a white light-emitting phosphor comprising:

  • (a) a bottom substrate;

    (b) a first electrode layer deposited on the bottom substrate;

    (c) a first insulating layer deposited on the first electrode layer;

    (d) a red light-emitting phosphor layer comprising a ZnS;

    Mn layer deposited on the first insulating layer;

    (e) a blue green light-emitting phosphor layer comprising an SrS;

    Ce layer deposited on the red light-emitting phosphor layer;

    (f) a blue light-emitting phosphor layer comprising a Srx Ca1-x Ga2 S4 ;

    Ce layer, where 1≧

    x≧

    0, deposited on the blue green layer;

    (g) a transparent second insulating layer placed atop the blue light-emitting phosphor layer; and

    (h) a transparent second electrode layer deposited on the transparent second insulating layer.

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