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Energy-efficient optoelectronic smart window

  • US 7,940,457 B2
  • Filed: 08/29/2008
  • Issued: 05/10/2011
  • Est. Priority Date: 05/30/2008
  • Status: Active Grant
First Claim
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1. A window comprising:

  • a first window pane having a first index of refraction;

    a second window pane having a second index of refraction, wherein the first index of refraction is smaller than the second index of refraction; and

    a diffraction grating comprising;

    an electro-optic material positioned between the first and second window panes;

    a counter electrode; and

    a two-dimensional array of signal electrode elements;

    wherein the electro-optic material is provided between the counter electrode and the two-dimensional array of signal electrode elements such that voltages applied between the counter electrode and the signal electrode elements provide a selected spatial distribution of refractive indices to the electro-optic material.

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