Patent ID: 8330356
Filing Date: 2012-12-11
Classification: H01L

Abstract:
1. An organic light emitting display device (OLED), comprising: a substrate; a first electrode formed over the substrate, the first electrode comprising a reflective layer, the reflective layer being substantially reflective to visible light; an organic layer formed over the first electrode, the organic layer comprising at least one light emission layer configured to emit white light; a semi-transmissive second electrode formed over the organic layer and configured to transmit therethrough white light from the organic layer; and a transmittance controlled layer (TCL) formed on the second electrode and configured to regulate intensity of various frequency components of the white light from the semi-transmissive second electrode, the transmittance controlled layer having an optical path length of about 260 Å to about 1520 Å, wherein the optical path length extends in the direction of the thickness of the transmittance controlled layer, wherein but for the TCL, white light passing through the semi-transmissive second electrode would have an original intensity spectrum, in which a blue light peak is lower than a green light peak, which is lower than a red light peak, wherein by contrast, after passing through the semi-transmissive second electrode and the TCL, the white light has a regulated intensity spectrum, in which a difference between normalized values of a blue light peak and a red light peak is substantially smaller than a difference between normalized values of the blue light peak and the red light peak of the original spectrum.