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US 6,472,817 B1Granted
Organic light emitting device incorporating a waveguide
AssigneeSeiko Epson Corporation
InventorTakeo Kawase
Life of this patent
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Abstract
The present invention provides an organic light emitting device having a first electrode and a transparent electrode with an organic light emitting layer therebetween; characterized by a waveguide provided on the opposite side of the transparent electrode compared to the organic light emitting layer. The present invention also provides a device incorporating at least two such organic light emitting devices so as to provide a pulsed modulation output or a multi-color output.
Claims15
An organic light emitting device, comprising:
- a first electrode;
- a transparent electrode;
- an organic light emitting layer disposed between the first electrode and the transparent electrode;
- and
- a waveguide provided on the opposite side of the transparent electrode compared to the organic light emitting layer and having an interface with the transparent electrode, wherein at least one of a refractive index and a thickness of the light emitting layer and a refractive index and a thickness of the transparent electrode are arranged to cause, in operation of the device, resonance of light emitted by the light emitting layer within the light emitting layer and the transparent electrode and to cause light emitted from the light emitting layer to enter the waveguide at a shallow grazing angle relative to the interface between the waveguide and the transparent electrode.
2 more elements
Dependencies are inferred from the claim text.