or plastic or other like wood etc the fastening structure is shown only schematically in fig1 the two receiving elements 82 and the two fastening elements 62 may establish a bayonet connector or may be arranged to fasten the two fastening elements 62 of the organic electroluminescent device 1 arranged as plates flaps latches or hooks the fastening elements 62 may be fixed into the cooresponding part of the bayonet connector via springs pushing onto the fastening elements 62 people skilled in the art are able to chose the appropriate shape of a bayonet connector a fastening element 62 as latch plate or flap would be inserted into a corresondingly shaped cavity as the receiving element 82 the insertation could be performed via a translational motion or via a rotational mortion depending on the shape of the housing 8 the oled 1 and or the cover lid 6 62 the material of the fastening elements 62 could be any material suitable to fasten the oled 1 to the housing 8 preferably the fastening elements 62 are made of the same material as the remaining cover lid 6 more preferably the cover lid 6 comprising the fastening elements 62 is a single piece component 6 after inserting in the organic electroluminescent device 1 into the housing 8 a light emitting unit is formed when a driving voltage is applied to the.