Display devices using feedback enhanced light emitting diode

摘要

Display devices using feedback-enhanced light emitting diodes may include active and passive matrix displays and projection displays. A light emissive element disposed between feedback elements is used as light emitting element in the display devices. The light emissive element may include organic or non-organic material. The feedback elements coupled to an emissive element allow the emissive element to emit collimated light by stimulated emission. The feedback elements that provide this function include holographic reflectors with refractive index variations that are continuous.

主权项

1. A display device, comprising:
a first feedback layer adapted to receive and reflect light; one or more first electrode strips formed over the first feedback layer; one or more semiconducting layers formed over the first electrode strips, at least one of the one or more semiconducting layers comprising at least a luminescent material; one or more second electrode strips formed over the luminescent material the second electrode strips being formed such that they overlay one or more of the first electrode strips, wherein an area where the first electrode strip and the second electrode strip overlap comprises a segment area capable of being driven via the first electrode strips and the second electrode strips; a second feedback layer adapted to receive and reflect light disposed over the one or more second electrode strips; and an imaging element disposed proximate to one of the first feedback layer and the second feedback layer; wherein one or both of the first feedback layer and the second feedback layer has a refractive index profile that varies at least in part periodically alone an axis normal or substantially normal to a plane of a respective feedback layer; and wherein one or both of the first feedback layer and the second feedback layer comprises at least a layer of holographic recording material.