Lighting device having plural light emitting layers with carrier generation layer therebetween
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United States of America Patent
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May 7, 2013
Grant Date -
May 5, 2011
app pub date -
Dec 28, 2010
filing date -
Sep 13, 2004
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Abstract
It is an object of the present invention to provide a light emitting device which is less affected by a malfunction caused in a light emitting element. It is another object of the invention to provide a light emitting device in which light emitting elements are connected in series. As to a light emitting device of the invention, groups of circuits each having a light emitting element and a limiter are connected in parallel. Here, a light emitting element and a limiter are connected in series. The number of the circuits may be at least two or more. Further, each circuit group includes at least one light emitting element.
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