Optical device and organic EL display
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United States of America Patent
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Aug 11, 2009
Grant Date -
Mar 23, 2006
app pub date -
Nov 10, 2005
filing date -
Aug 13, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
An optical device includes a first waveguide layer in which multiple-beam interference occurs, a second waveguide layer which includes a back surface facing the first waveguide layer and a front surface as a light output surface, and a diffraction grating which is arranged on a back side of the second waveguide layer and faces the first waveguide layer, wherein a grating constant of the diffraction grating is defined such that a first-order diffracted light emerges from the second waveguide layer, the first-order diffracted light being generated when a light component having a highest intensity of light which propagates in an in-plane direction while causing multiple reflection in the first waveguide layer enters the diffraction grating.
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