Abstract: Applying the method of manufacturing a polymeric foil (30) having partly embedded inorganic particles (19) results in the polymeric foil (30) being suitable for use as a movable element (3) in a display panel (21). The method starts by embedding inorganic particles (19) partly into a release layer (32) which covers a substrate (31). This product (37) is covered with a layer of polymeric material (18), which is solidified to obtain the polymeric foil (30). By removing the release layer (32), the polymeric foil (30) having a surface with a roughness brought about by the partly embedded inorganic particles (19) is set free.

Abstract: The display panel 21 comprises a light guide plate 2, a second plate 4 and a movable element 3 between both plates, for locally coupling light out of the light guide plate 2. Voltages applied to electrodes 5, 6 and 25 locally bring the movable element 3 into contact with the light guide plate 2 or the second plate 4. Means for reducing sticking of the movable element 3 to the plates comprise a roughness R1 at the contact surface 14 of the light guide plate 2 facing the movable element 3, a roughness R2 at the contact surface 15 of the movable element 3 facing the light guide plate 2, a roughness R3 at the contact surface 16 of the second plate 4 facing the movable element 3 and a roughness R4 at the contact surface 17 of the movable element 3 facing the second plate 4. The roughnesses R1 and R2 are smaller than at least one of the roughnesses R3 and R4. By virtue thereof, sticking is reduced and the display panel 21 requires relatively little energy to be operated.