Light emitting device and manufacturing method thereof and display used this light emitting device
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United States of America Patent
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-
May 31, 2005
Grant Date -
Apr 3, 2003
app pub date -
Sep 30, 2002
filing date -
Oct 3, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A light emitting device and a manufacturing method thereof and a display used the light emitting device, in which fine patterning for the light emitting device is realized by a simple process and the light leakage is prevented and the efficiency at extracting light is increased, are provided. The light emitting device provides an organic electroluminescent (EL) device in which electrodes and a luminescent layer are formed, a diffraction grating or a zone plate, and a filter. Light emitted from the luminescent layer transmits through the diffraction grating or the zone plate, which is formed with a designated grating pitch, or is reflected at the diffraction grating or the zone plate. With this, the transmitting or reflecting light is controlled to be in a designated angle region. And when the light is transmitted through the filter, light having different color tone and chromaticity from those of the light emitted from the luminescent layer is extracted.
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