Abstract: An optical device, having an active matrix, containing polymer dispersed liquid crystals, guest-host liquid crystals, suspended particles and/or polymer stabilized cholesteric liquid crystals, the active high transmissive mode has at least 40% of incoming light transmitted through the optical device and in low transmissive mode less than 40% of incoming light transmitted through the optical device, the active matrix is switchable between high transmissive mode and low transmissive mode. The optical device containing a fail-safe mechanism, which is capable to switch the active matrix from a low transmissive mode in a high transmissive mode without the power of an applied grid. The optical device has a fail-safe mechanism comprising at least one battery and a controller.

Abstract: The invention pertains to an optical device comprising at least one glass or polymer area, whereby an active matrix is located in contact with the at least one glass or polymer area, the optical device comprises a power supply system located between a first auxiliary plane and a second auxiliary-plane parallel to a glass or polymer area, and a distance L from a third auxiliary-plane or a fourth auxiliary-plane approximately perpendicular to the glass or polymer area. The invention pertains also to a power supply system for such an optical device.

Abstract: An optical device, having an active matrix, containing polymer dispersed liquid crystals, guest-host liquid crystals, suspended particles and/or polymer stabilized cholesteric liquid crystals, the active high transmissive mode has at least 40% of incoming light transmitted through the optical device and in low transmissive mode less than 40% of incoming light transmitted through the optical device, the active matrix is switchable between high transmissive mode and low transmissive mode. The optical device containing a fail-safe mechanism, which is capable to switch the active matrix from a low transmissive mode in a high transmissive mode without the power of an applied grid.

Abstract: The invention pertains to an optical device comprising at least one glass or polymer area, whereby an active matrix is located in contact with the at least one glass or polymer area, the optical device comprises a power supply system located between a first auxiliary plane and a second auxiliary-plane parallel to a glass or polymer area, and a distance L from a third auxiliary-plane or a fourth auxiliary-plane approximately perpendicular to the glass or polymer area. The invention pertains also to a power supply system for such an optical device.