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Graphene layers for identification of products

  • US 9,568,421 B2
  • Filed: 07/22/2016
  • Issued: 02/14/2017
  • Est. Priority Date: 01/19/2015
  • Status: Active Grant
First Claim
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1. A method of verifying a product using a multilayered security device, comprising:

  • applying, by an antenna of a capture device, a low-power radio frequency (RF) signal to a security device attached to the product,wherein the security device includes an Organic Light Emitting Diode (OLED) substrate with an embedded RF coil, the embedded RF coil causing the OLED substrate to emit light in response to the applied low-power RF signal, the security device further comprising a graphene sheet made of a monolayer of covalently bonded carbon atoms, the graphene sheet preventing light emitted from the OLED substrate to form a contrasting pattern of emitted light;

    receiving, by a camera of the capture device and in response to the applied low-power RF signal, a captured pattern from the contrasting pattern of emitted light of the security devicedetermining the captured pattern matches an expected pattern; and

    verifying the authenticity of the product in response to the captured pattern matching the expected pattern.

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