Automatically alternating clear glass and milk or matt glass sheet or glass elements

摘要

The invention relates to automatically alternating clear glass and milk or matt glass sheets or glass elements which are characterised in that an electroviscous liquid is applied as a thin intermediate layer between two glass sheets coated to have different electrical conductivity, which intermediate film changes its refractive index by applying an electric voltage to the metal electrodes having imperfections so that the initially clear transparency is distorted, causing a milk glass effect. When the electric voltage is removed, the clear glass state is reconstituted.