OLED display with improved color uniformity

    公开(公告)号:US10566391B2

    公开(公告)日:2020-02-18

    申请号:US16301142

    申请日:2017-05-18

    Abstract: Organic light emitting diode (OLED) displays having an emissive OLED layer and a nanostructured interface configured to reduce variability of color with view angle are described. An optical stack having first and second layers with differing refractive indices includes the nanostructured interface between the first and second layers. The second layer is disposed between the first layer and the emissive OLED layer. The nanostructured interface has a substantially azimuthally symmetric power spectral density (PSD) and a wavenumber-PSD product has a maximum for a wavenumber larger than 6 radians/micrometer times the refractive index of the second layer. For all wavenumbers lower than 6 radians/micrometer times the second refractive index, the wavenumber-PSD product is no more than 0.3 times the maximum.

    THIN HOLLOW BACKLIGHTS WITH BENEFICIAL DESIGN CHARACTERISTICS
    17.
    发明申请
    THIN HOLLOW BACKLIGHTS WITH BENEFICIAL DESIGN CHARACTERISTICS 有权
    具有优点设计特性的中空背光

    公开(公告)号:US20140009963A1

    公开(公告)日:2014-01-09

    申请号:US13938016

    申请日:2013-07-09

    Abstract: A front and back reflector are arranged to form a hollow light recycling cavity having an output region, and one or more light sources (e.g. LEDs) are disposed to emit light into the cavity. In one aspect, the back reflector has a design characterized by a first and second parameter. The first design parameter is a ratio of the collective emitting area of the light sources Aemit to the area of the output region Aout, and Aemit/Aout is preferably from 0.0001 to 0.1. The second design parameter is SEP/H, where H is the depth of the recycling cavity, and SEP is an average plan view source separation associated with the light sources. Other aspects of the disclosed extended area light sources are also described.

    Abstract translation: 前后反射器被布置成形成具有输出区域的中空光循环腔,并且设置一个或多个光源(例如LED)以将光发射到空腔中。 在一个方面,后反射器具有以第一和第二参数为特征的设计。 第一设计参数是光源Aemit的总发光面积与输出区域Aout的面积的比,Aemit / Aout优选为0.0001〜0.1。 第二个设计参数是SEP / H,其中H是回收腔的深度,SEP是与光源相关的平均平面视图源分离。 还描述了所公开的扩展区域光源的其他方面。

    OLED DISPLAY WITH IMPROVED COLOR UNIFORMITY
    20.
    发明申请

    公开(公告)号:US20190214436A1

    公开(公告)日:2019-07-11

    申请号:US16301142

    申请日:2017-05-18

    Abstract: Organic light emitting diode (OLED) displays having an emissive OLED layer and a nanostructured interface configured to reduce variability of color with view angle are described. An optical stack having first and second layers with differing refractive indices includes the nanostructured interface between the first and second layers. The second layer is disposed between the first layer and the emissive OLED layer. The nanostructured interface has a substantially azimuthally symmetric power spectral density (PSD) and a wavenumber-PSD product has a maximum for a wavenumber larger than 6 radians/micrometer times the refractive index of the second layer. For all wavenumbers lower than 6 radians/micrometer times the second refractive index, the wavenumber-PSD product is no more than 0.3 times the maximum.

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