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US 9,425,432 B2Granted
Organic electroluminescent element and light emitting device with optical path control layer
AssigneeKabushiki Kaisha Toshiba
InventorsTomoaki Sawabe, Tomio Ono, Toshiya Yonehara, Shintaro Enomoto
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Abstract
According to one embodiment, an organic electroluminescent element includes a first electrode, a second electrode provided opposite to the first electrode, an organic light emitting layer provided between the first electrode and the second electrode, and a protrusion. The protrusion is provided at least one of between the first electrode and the organic light emitting layer and between the organic light emitting layer and the second electrode.
Claims18
An organic electroluminescent element comprising:
- a first electrode;
- a second electrode provided opposite to the first electrode;
- an organic light emitting layer provided between the first electrode and the second electrode;
- and
- a protrusion provided at least one of between the first electrode and the organic light emitting layer and between the organic light emitting layer and the second electrode;
- and
- an optical path control layer provided on an opposite side of the first electrode from a side provided with the organic light emitting layer,
- a formula
- n1×0.9≦n2≦n1×1.1
- is satisfied, where n2 is a refractive index of an optical path control layer, and n1 is a refractive index of the organic light emitting layer.
7 more elements
A light emitting device comprising:
- an organic electroluminescent element including:
- a first electrode;
- a second electrode provided opposite to the first electrode;
- an organic light emitting layer provided between the first electrode and the second electrode;
- a protrusion provided at least one of between the first electrode and the organic light emitting layer and between the organic light emitting layer and the second electrode;
- and
- an optical path control layer provided on an opposite side of the first electrode from a side provided with the organic light emitting layer,
- a formula
- n1×0.9≦n2≦n1×1.1
- is satisfied, where n2 is a refractive index of an optical path control layer, and n1 is a refractive index of the organic light emitting layer,
- a driving unit configured to apply a current to the organic electroluminescent element;
- and
- a control unit configured to control the driving unit.
10 more elements
Dependencies are inferred from the claim text.