Organic light-emitting diode (OLED) screens are becoming popular in consumer devices due to the ability to fold such screens. However, repeated folding and unfolding is known to cause bending (warpage) at the fold. This disclosure describes techniques that reduce warpage by introducing a fan at the hinge. By Bernoulli’s principle, an increase in air speed along the fan axis causes a pressure differential perpendicular to the axis of the fan, e.g., across the fold. This pressure differential undoes the warpage.
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Tan, Wenli; Ou, Davis; and Tseng, Chun, "Reducing warpage in foldable OLED screens", Technical Disclosure Commons, (August 14, 2019)