52‐4: Novel Polarizer‐Free OLED Structure with High Optical Gain

With the recent increase in OLED usage, the size and shape of devices are diversifying. In addition, portability is becoming more important along with product performance and improvement. In order to enhance portability, it is necessary to improve battery performance and increase the time available without charging. To this end, it is required to reduce display power consumption, and various methods and structures for reducing power consumption by improving the efficiency of many OLED products have been proposed. Most OLED displays have a polarizer film applied to secure black viewing in the off‐state. However, this reflectance‐reducing film has a transmittance 50% or less, thus the light extraction efficiency is very bad. This paper introduces a simulation‐based design methodology of a new display that is devoid of polarizer film. It required the task of obtaining high outdoor contrast by reducing reflectance of external light with improved light efficiency. By separating the panel structure and optimizing optical filters and OLED devices, reflection reduction, efficiency improvement, and viewing angle characteristics were secured at the same time. The simulation‐based optical design methodology is an important technology that can simultaneously optimize the optical characteristics of new type of display, and is expected to be applied to various product developments in the future.