Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2004-09-28
2009-02-10
Roy, Sikha (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S504000, C313S503000, C313S500000, C313S483000, C428S917000, C428S690000
Reexamination Certificate
active
07489074
ABSTRACT:
In an embodiment of the invention, a microcavity OLED device that minimizes or eliminates color change at different viewing angles is fabricated. The OLED device can be, for example, an OLED display or an OLED light source used for area illumination. This OLED device includes a multi-layer mirror on a substrate, and each of the layers are comprised of a non-absorbing material. The OLED device also includes a first electrode on the multi-layered first mirror, and the first electrode is substantially transparent. An emissive layer is on the first electrode. A second electrode is on the emissive layer, and the second electrode is substantially reflective and functions as a mirror. The multi-layer mirror and the second electrode form a microcavity. On a front surface of the substrate is a light modulation thin film. The light modulation thin film can be any one of: a cut-off color filter, a band-pass color filter, a brightness enhancing film, a microstructure that attenuates an emission spectrum at an angle at which there is a perceived color change, or a microstructure that redistributes wavelengths so the outputted emission spectrums have the same perceived color.
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Antoniadis Homer
Doerfel Fabian
Cohen Pontani Lieberman & Pavane LLP
Osram Opto Semiconductors GmbH
Roy Sikha
Walford Natalie K
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