LED device having improved contrast

Details LED device having improved contrast LED device having improved contrast

2007-06-11

2010-11-02

Roy, Sikha (Department: 2879)

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Light diffusing

C313S112000, C313S117000, C313S498000, C313S506000, C313S509000, C445S024000, C445S025000

Reexamination Certificate

active

07825570

ABSTRACT:
A light-emitting diode (LED) device includes a reflective electrode and a transparent electrode having one or more light-emitting layers formed there-between. A contrast-enhancement element is located on a side of the transparent electrode opposite the light-emitting layer. The contrast-enhancement element has a first reflected-light absorbing layer and a second layer including transparent areas and reflective areas. The second layer is between the first reflected-light absorbing layer and the reflective electrode. A patterned light-scattering layer is located between the reflective areas of the second layer and the reflective electrode.

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