Display devices using feedback enhanced light emitting diode
AssigneeZeolux Corporation
InventorsJohn N. Magno, Gene C. Koch
Life of this patent
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Abstract
Display devices using feedback-enhanced light emitting diodes are disclosed. The display devices include but are not limited to 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. In one aspect, feedback elements that provide this function include, but are not limited to, holographic reflectors with refractive index variations that are continuous.
Claims11
A method of fabricating a display device, comprising:
- forming pixel drive circuits on a substrate;
- forming a first feedback layer having continuously varying refractive index profile on the substrate with pixel drive circuits;
- forming a first conductive layer on the first feedback layer;
- patterning the first conductive layer into first electrodes;
- forming interconnections from the pixel drive circuits to the first electrodes;
- forming a light emitting diode structure comprising at least one emissive layer on the first feedback layer and first electrodes;
- forming a second conductive layer on the light emitting diode structure;
- patterning the second conductive layer into second electrodes;
- and
- forming a second feedback layer over the light emitting diode structure.
A method of fabricating a display device, comprising:
- forming a substrate;
- forming a first feedback layer having a continuously varying refractive index profile on the substrate;
- forming one or more first electrode strips on the first feedback layer;
- forming an OLED device comprising at least one layer of emissive material over the first electrode strips;
- forming one or more second electrode strips over the OLED device overlaying the first electrode strips, wherein areas of the OLED device where the first electrode strip and the second electrode strip overlap form pixel areas capable of being driven via the first electrode strips and the second electrode strips;
- and
- forming a second feedback layer over the one or more second electrode strips.
Dependencies are inferred from the claim text.