期刊
OPTICAL MATERIALS
卷 34, 期 4, 页码 716-723出版社
ELSEVIER
DOI: 10.1016/j.optmat.2011.10.005
关键词
Organic light emitting diodes; Contrast ratio; Polarizer; Black matrix
资金
- Samtel Color Ltd., New Delhi
- Department of Science and Technology, Government of India
Organic light emitting diode (OLED) based displays have matured into commercial products. However, while we consider OLED for a low-cost high-resolution and high-contrast displays with a long life span. still there are performance gaps. This review addresses various techniques used for increasing the ambient contrast ratio of OLED displays. There are techniques which are integral to the OLED device, such as black cathodes and absorbing transport layers. In contrast, anti-reflection (AR) coatings and circular polarizer are applied externally to the device. This review provides a brief overview of each technique along with a discussion on its merits and demerits. The choice of a particular contrast enhancement technique for a display depends on the ambient where the same is intended to be used. Accordingly, for indoor and outdoor applications, the best possible methods are suggested. (C) 2011 Elsevier B.V. All rights reserved.
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