Organic electroluminescent device

Details Organic electroluminescent device Organic electroluminescent device

2005-06-14

2005-06-14

Patel, Vip (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S506000

Reexamination Certificate

active

06906457

ABSTRACT:
An organic electroluminescent display (EL) device including a substrate, a transparent electrode, a hole transport layer, a light emitting layer, an electron transport layer and a cathode, sequentially stacked, wherein assuming that the sum of a geometric thickness of the electron transport layer, a geometric thickness of the light emitting layer is denoted by l1, the l1with a maximum of luminance is denoted by a peak_l1, the sum of a geometric thickness of the hole transport layer and a geometric thickness of the transparent electrode is denoted by l2, the geometric thickness of the hole transport layer is denoted by d(HTL), the d(HTL) with a maximum or minimum of luminance is denoted by a peak_d(HTL), the l1is set to have an maximum of luminance and l2is set such that a thickness distribution according to colors of red, green and blue at the peak_l2is within the range of 30 nm, respectively.

REFERENCES:
patent: 4-137485 (1992-05-01), None
patent: 4-328295 (1992-11-01), None
patent: 7-240277 (1995-09-01), None

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