Lighting device

  • US 9,863,599 B2
  • Filed: 10/01/2014
  • Issued: 01/09/2018
  • Est. Priority Date: 06/19/2014
  • Status: Active Grant
First Claim
Patent Images

1. A lighting device, comprising:

  • a support;

    a light emitting component mounted on the support; and

    an electronic lamp cover mounted on the support to surround the light emitting component;

    wherein the electronic lamp cover presents different light transmitting states upon the electronic lamp cover being applied with different voltage values within an operation voltage range,wherein the electro-variable light transmittance layer is made of a material of photoelectric crystal, and the photoelectric crystal comprises KH2PO4, NH4H2PO4, KH2AsO4 and KD2PO4.

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