A mirror device (1) which can be simultaneously used for display purposes based on e.g. an LCD display (5) with a polarizing mirror (2) placed in front of it. The orientation direction of a retardation layer (31, 32) is aligned with respect to the polarization direction of the polarizing mirror to give...http://www.google.co.uk/patents/US20070183037?utm_source=gb-gplus-sharePatent US20070183037 - Mirror with built-in-display
