P‐13.7: Uniform Reflection of Panel and Polarizer for the Premium Black of Watch

The uniformity of premium black in all viewing directions in organic light‐emitting diode (OLED) displays is regarded as an important element for consumers and the properly combination of polarizer and uneven panel can improve the uniformity of large viewing angles for OLED displays. In this paper, the pattern of ΔE change is investigated with the different polarizer fitting angle on watch panel. The results showed that the premium black in all viewing directions for watch can be achieved by utilizing 0° or 135° fitting angle of polarizer on different watch panel.