Lighting device including first electrode, second electrode, light emitting layer therebetween and third electrode connected to the first electrode through opening in the second electrode and the light emitting layer
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United States of America Patent
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Apr 6, 2010
Grant Date -
Nov 24, 2005
app pub date -
May 4, 2005
filing date -
May 21, 2004
priority date (Note) -
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Abstract
An object of the invention is to provide a lighting device which can suppress luminance nonuniformity in a light emitting region when the lighting device has large area. A layer including a light emitting material is formed between a first electrode and a second electrode, and a third electrode is formed to connect to the first electrode through an opening formed in the second electrode and the layer including a light emitting material. An effect of voltage drop due to relatively high resistivity of the first electrode can be reduced by electrically connecting the third electrode to the first electrode through the opening.
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