Screen for displaying information for an optical device

A screen for displaying information for an optical device, which is arranged within an optical path of the optical device and comprises:

• a transparent organic light-emitting device (TOLED) which is capable of emitting light when a control signal is present at an input to the TOLED,
• wherein the TOLED includes:
• (i) a transparent substrate;
• (ii) a lower electrode which is formed on the substrate to receive a power and the control signal;
• (iii) an organic layer which is formed on the lower electrode;
• (iv) a first light-transmissive layer which is formed on the organic layer;
• (v) an upper electrode which is formed on the first light-transmissive layer to receive the control signal;
• and
• (vi) a second light-transmissive layer which is formed on the upper electrode,
• wherein the (i), (ii), (iii), (vi), (v), and (vi) are stacked in this order,
• wherein the first light-transmissive layer (iv) and the second light-transmissive layer (vi) each include at least one selected from the group consisting of an oxide, nitride, salt, and a composite thereof, and
• wherein the first light-transmissive layer (iv) and the second light-transmissive layer (vi) are made of different materials from each other.