Analysis And Optimization On The Angular Color Shift Of Rgb Oled Displays

Abstract

Microcavites contribute to enhancing the optical efficiency and color saturation of an organic light emitting diode (OLED) display. A major tradeoff of the strong cavity effect is its apparent color shift, especially for RGB-based OLED displays, due to their mismatched angular intensity distributions. To mitigate the color shift, in this work we first analyze the emission spectrum shifts and angular distributions for the OLEDs with strong and weak cavities, both theoretically and experimentally. Excellent agreement between simulation and measurement is obtained. Next, we propose a systematic approach for RGB-OLED displays based on multi-objective optimization algorithms. Three objectives, namely external quantum efficiency (EQE), color gamut coverage, and angular color shift of primary and mixed colors, can be optimized simultaneously. Our optimization algorithm is proven to be effective for suppressing color shift while keeping a relatively high optical efficiency and wide color gamut.

Publication Date

12-25-2017

Publication Title

Optics Express

Volume

25

Issue

26

Number of Pages

33629-33642

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1364/OE.25.033629

Socpus ID

85039040383 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/85039040383

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