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Enhancement of blue‐light‐emission properties for OLED displays by using a polarized light‐recycling structure
Author(s) -
Adachi Masaya,
Aratani Sukekazu,
Yanagawa Kaoru
Publication year - 2008
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/1.2966450
Subject(s) - gamut , materials science , polarizer , optoelectronics , blue light , oled , luminous efficacy , backlight , optics , light emission , color rendering index , phosphorescence , light reflection , light emitting diode , diode , liquid crystal display , fluorescence , nanotechnology , layer (electronics) , physics , birefringence
— The blue‐light‐emission properties of organic light‐emitting‐diode (OLED) displays must be enhanced to meet the requirements for color purity and luminous efficiency because few blue‐light‐emitting materials meet these requirements. This is particularly true for polymeric and phosphorescent light‐emitting materials. To attain the required purity and efficiency, a polarized‐light‐recycling structure for blue light that is called a blue enhanced circular polarizer (BECP) has been developed. The principle of the structure and the fabricated prototype device is described and it is shown that the structure increases blue‐light intensity and color purity, improves efficiency, provides a wide color gamut, and limits ambient‐light reflection.