WINDOW SYSTEM COMBINING WINDOW AND ILLUMINATION FUNCTIONALITIES

摘要

The present invention discloses a window system (10) comprising a transparent window element (1), a transparent organic light-emitting element (2) comprising at least one organic light emitting layer (21) arranged between electrodes (22) to emit artificial light (51, 52) and an optical element (3) comprising at least one functional layer (31) arranged between switching electrodes (32), which is electrically switchable between a transparent mode in order to enable a transmission of window light (4) through the window system and a reflective or absorbing mode in order to reflect or absorb at least an essential part of the artificial light (51, 52) emitted towards the optical element (3) as well as a building system comprising a multitude of window systems and a method of operating a window system.