Patent ID: 6746775
Filing Date: 2004-06-08
Classification: B32B,G02F,Y10T

Abstract:
Glazing comprising (a) at least one electrically controllable system having variable optical and/or energy properties, (b) at least one coating for adjusting the optical appearance conferred on the said glazing by the said system, said at least one coating having antireflection properties in the visible, wherein said coating having antireflection properties is deposited on at least one of the external faces of said glazing and comprises a stack of thin layers having alternately high and low reflective indices or a graded-refractive-index layer, and (c) at least one coating for attenuating/modifying the color of the glazing in reflection, wherein said at least one coating of component (c) acts to lower C* saturation values in the (L, a*, b*) colorimetry system of the glazing in reflection,wherein the coating (c) includes a thin layer having a refractive index of between 1.6 and 1.9, and wherein the thin layer having a refractive index of between 1.6 and 1.9 is based on at least one of aluminum oxide Al2O3, yttrium oxide Y2O3, silicon oxycarbide SiOC, and silicon oxynitride SiON.