Patent ID: 7268488
Filing Date: 2007-09-11
Classification: H01L,Y10S

Abstract:
1. An organic light emitting device (OLED), comprising: a transparent lower electrode formed on an insulation substrate; an organic emitting layer formed on the lower electrode; and an upper electrode formed on the organic emitting layer and having a semi-transparent metal layer and a transparent conductive layer, wherein a ratio of luminance in a direction towards the lower electrode to luminance in a direction towards the upper electrode is different according to a thickness of the semi-transparent metal layer, wherein either the semi-transparent metal layer is not less than 95 Å in thickness and the ratio of the luminance in the direction towards the lower electrode to the luminance in the direction towards the upper electrode is not less than 4.5 or the semi-transparent metal layer is not more than 60 Å in thickness and the ratio of the luminance in the direction towards the lower electrode to the luminance in the direction towards the upper electrode is not more than 3.5.