P‐180: Swipe Mura in LCD Panel and Its Correlation with the Panel Shape

Swipe mura is known to occur in LCD panels both in IPS/FFS and VA modes. This mura is generated when one swipes the surface of a vertically placed panel such that an applied force continuously induces a local bend. After the swipe, the mura stays visible along the swipe direction, until a light tapping on the panel surface makes it disappear, indicating a temporal/metastable shape change being the culprit. Corning acquired a new capability with which we can capture a slight shape change in vertically placed LCD panels (up to 75”) and at the same time capture a brightness distribution. With this new tool, we investigated the mechanism and the optics of the swipe mura.