G02F 2001/15025

Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on an electrochromic effect {complementary cell having an inorganic electrochromic layer and a second solid organic electrochromic layer}