OLED devices having improved efficiency
First Claim
Patent Images
1. An organic light emitting display comprising:
- a first emissive region having a width across a substrate of 2r; and
an outcoupling component disposed over the emissive region and having a horizontal base surface, the base surface disposed a vertical distance t from the first emissive region and optically coupled to the first emissive region, the outcoupling component having an index of refraction nlens and a width across the base surface of 2R;
wherein [0≤
t<
√
{square root over (nlens2−
1)}*(r+R)].
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Abstract
Devices, components and fabrication methods are provided for improving the efficiency of OLED displays. An outcoupling component such as a microlens array (MLA) is attached to an OLED, with a relatively small distance between the MLA and the OLED. Cross-talk and back scattering are reduced by the use of colored lenses, focusing layers, and other methods.
77 Citations
19 Claims
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1. An organic light emitting display comprising:
-
a first emissive region having a width across a substrate of 2r; and an outcoupling component disposed over the emissive region and having a horizontal base surface, the base surface disposed a vertical distance t from the first emissive region and optically coupled to the first emissive region, the outcoupling component having an index of refraction nlens and a width across the base surface of 2R; wherein [0≤
t<
√
{square root over (nlens2−
1)}*(r+R)]. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An organic light emitting display comprising:
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a first emissive region having a width across a substrate of 2r; and a scattering layer disposed over the emissive region and having a width of 2R; and a spacing layer with a thickness oft and an average refractive index of nsp, the spacing layer being disposed between and optically coupled to the first emissive region and the scattering layer; wherein 0<
t<
√
{square root over (nsp2−
1)}*(r+R).
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Specification