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High energy invisible light light emitting diode having safety indication

  • US 9,502,621 B2
  • Filed: 03/23/2015
  • Issued: 11/22/2016
  • Est. Priority Date: 03/23/2015
  • Status: Expired due to Fees
First Claim
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1. A high energy invisible light light emitting diode (LED) having safety indication, comprising:

  • a high energy invisible light light emitting structure, sequentially stacking and comprising a P-type semiconductor layer, a high energy invisible light light emitting layer that receives a forward bias to emit invisible light, and an N-type semiconductor layer, the N-type semiconductor layer comprising a light exiting surface away from the high energy invisible light light emitting layer;

    two potential applying layers, respectively being in contact with the P-type semiconductor layer and the N-type semiconductor layer; and

    a safety indication structure, deposed on the high energy invisible light light emitting structure, comprising a semiconductor layer contacting with the light exiting surface directly and a photoluminescent light emitting layer absorbing and converting invisible light to visible light and contacting with the semiconductor layer directly, wherein the photoluminescent light emitting layer comprises a plurality of hollow regions to reveal invisible light directly and forming a three-dimensional structure which is partially hollow on the light exiting surface,wherein the safety indication structure is disposed on a partial region of the light exiting surface, andwherein the safety indication structure is one of numeric, text, and text and numeric representations.

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