| 摘要 |
<p>Drawing board comprises a support on which are applied >=1 light emitting layer and >=1 layer having a surface for drawing. The layer for drawing is pref. transparent and pref. also comprises the light emitting layer. Luminescent material is pref. Zns. At least one layer is a polymer or polycondensate which is applied pref. hot and then evaporated or which is prepd. in situ. The polymer or polycondensate is pref. in the form of a film fixed to the other layers and it pref. contains the luminescent material. Suitable polymers are e.g. polyolefins and polyesters. Drawing can be effected in total or partial darkness, e.g. in vehicle piloting by night.</p> |
