LIGHT EXTRACTION APPARATUS AND METHODS FOR OLED DISPLAYS AND OLED DISPLAYS USING SAME

Apparatus and methods for improved light extraction from top-emitting OLEDs used to form displays include an array of light-emitting apparatus (60) each having the OLED (32) and a light-extraction apparatus (64) that includes an index-matching layer (70) and a tapered reflector (51). The tapered ref...

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Main Authors KANG KIAT CHYAI, ISHIKAWA TOMOHIRO, KUKSENKOV DMITRI VLADISLAVOVICH, TIMOFEEV NIKOLAY TIMOFEYEVICH, MLEJNEK MICHAL
Format Patent
LanguageChinese
English
Published 15.03.2019
Subjects
BASIC ELECTRIC ELEMENTS
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
SEMICONDUCTOR DEVICES
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Summary:Apparatus and methods for improved light extraction from top-emitting OLEDs used to form displays include an array of light-emitting apparatus (60) each having the OLED (32) and a light-extraction apparatus (64) that includes an index-matching layer (70) and a tapered reflector (51). The tapered reflector (51) has the form of an inverted truncated pyramid, with the narrow end (58) interfacing withthe OLED (32) through the index-matching layer (70). Light from the OLED undergoes total internal reflection within the tapered reflector (51) at the tapered reflector side surfaces (56) and is directed toward the top surface (54) of the tapered reflector (51). This light falls within the escape cone (59) of the top surface (54) and so exits the top surface (54). The OLED display (30) has a substrate that supports an array of OLEDs (32) and also includes an array of the tapered reflectors (51) operably arranged with respect to the OLEDs (32), and an encapsulation layer (100) atop the taperedreflector array. 用于改进从用于形成
Bibliography:Application Number: CN201780046800