Patent ID: 9651847
Date: 2017-05-16
CPC Classifications: E06B,G02B,G02F

Claim:
1. An electrophoretic insulated glass unit (IGU) comprises an electrophoretic laminate and a pane spaced apart from said electrophoretic laminate, the respective inner faces of said laminate and said pane defining a sealed cavity there between, and an outer face of said electrophoretic laminate being in contact with an environment, one inner face of said cavity having a coating that is transparent to visible light and which rejects infrared light greater than a cut-off wavelength; wherein said electrophoretic laminate includes an electrophoretic device including charged particles of at least one type in an electrophoretic cell, the particles being responsive to an electric field applied to said electrophoretic device to move between: a first extreme light state in which particles are maximally spread within said cell to lie in the path of sunlight through the cell and to strongly absorb visible sunlight transmitted through the cell and a second extreme light state in which said particles are maximally concentrated within the cell to remove them from the path of sunlight through the cell and to substantially transmit visible sunlight through the cell; and said coating is arranged to direct thermal radiation emitted by said charged particles to said environment in contact with said outer face, and said sealed cavity is arranged to direct thermal conduction diffusing from said charged particles to said environment in contact with said outer face.