Analysis of the Display Defect : White Spots

Abstract

Various kinds of display defects occasionally occur in liquid crystal displays (LCDs), producing uneven brightness. Such display defects cause significant problems on production. In this study, we have analyzed the display defect called white spot, using of FT-IR microscope and microsampling mass spectrometer. We cannot find any differences in bulk LC layer between abnormal part and normal part. But the composition ratios of the LC are different in the interface of LC/PI film, and much more polyol is detected at abnormal part than normal part in this interface.