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LIGHT EMITTING DEVICE AND MANUFACTURING METHOD THEREOF

  • US 20180123001A1
  • Filed: 10/19/2017
  • Published: 05/03/2018
  • Est. Priority Date: 05/14/2014
  • Status: Active Grant
First Claim
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1. A light-emitting device, comprising:

  • at least one light-emitting unit, wherein the light-emitting unit has an upper surface and a lower surface opposite to each other, the light-emitting unit comprises two electrode pads, and the two electrode pads are located on the lower surface of the light-emitting unit;

    a wavelength conversion adhesive layer, disposed on the upper surface of the light-emitting unit, wherein the wavelength conversion adhesive layer comprises a low-concentration fluorescent adhesive layer and a high-concentration fluorescent adhesive layer, and the high-concentration fluorescent adhesive layer is located between the low-concentration fluorescent adhesive layer and the light-emitting unit; and

    a reflective protecting element, covering the light-emitting unit and a portion of the wavelength conversion adhesive layer and at least exposing the two electrode pads of the light-emitting unit and the low-concentration fluorescent layer,wherein a width of the high-concentration fluorescent adhesive layer is WH, a width of the low-concentration fluorescent adhesive layer is WL, a width of the light-emitting unit is WE, and the light-emitting device further satisfies the following inequalities;


    WE<

    WL, WH<

    WL; and


    0.8<

    WH/WE

    1.2.

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