Active matrix type organic electro luminescence display device including a low refractive thin film and method of fabricating the same
View Patent ↗An active matrix organic electro luminescence display panel device includes a substrate, at least one low refractive thin film formed on the substrate, and an organic electro luminescence diode formed on the low refractive thin film to selectively emit light. Also, a method of fabricating an active matrix organic electro luminescence display panel device includes the steps of forming at least one low refractive thin film on a substrate, and forming an organic electro luminescence diode on the low refractive thin film to selectively emit light.
1. An active matrix organic electro luminescence display panel device comprising:
a substrate;
at least one low refractive thin film formed directly on the substrate;
an organic electro luminescence diode formed on the low refractive thin film to selectively emit light;
a switching device formed on the low refractive thin film for selectively driving the organic electro luminescence diode; and
a capacitor for sustaining a light emission of the organic electro luminescence diode, wherein the organic electro luminescence diode includes:
a first electrode formed of transparent conductive material on the low refractive thin film and connected to the switching device;
an organic light emission layer including an organic luminous material on the first electrode; and
a second electrode including a metal material to cover the organic light emission layer, the switching device, and the capacitor, and
wherein the switching device includes:
a buffer layer formed on the substrate;
a semiconductor layer formed at a predetermined area on the buffer layer;
a gate insulating film and a gate electrode sequentially deposited on the semiconductor layer;
a drain electrode connected to the semiconductor layer and connected to the first electrode of the organic electro luminescence diode; and
a source electrode connected to the semiconductor layer and connected to the capacitor.
2. The device according to claim 1 , wherein the capacitor includes:
a capacitor electrode formed on the buffer layer and separated from the semiconductor layer with a gap therebetween;
a first insulating layer covering the capacitor electrode; and
a power electrode overlapping the capacitor electrode on the first insulating layer and connected to the source electrode.
3. The device according to claim 1 , further comprising:
a second insulating layer covering the switching device and the capacitor, wherein the second insulating layer includes a contact hole and a portion of the first electrode is within the contact hole; and
a third insulating layer formed between the second insulating layer and the second electrode.
4. The device according to claim 1 , further comprising at least one fourth insulating layer formed between the low refractive thin film and the first electrode.
5. An active matrix organic electro luminescence display panel device comprising:
a substrate;
at least one low refractive thin film formed on the substrate;
an organic electro luminescence diode formed on the low refractive thin film to selectively emit light;
a switching device formed on the low refractive thin film for selectively driving the organic electro luminescence diode;
a first insulating layer formed between the substrate and the low refractive thin film to cover the switching device; and
a capacitor formed between the substrate and the low refractive thin film to sustain a light emission of the organic electro luminescence diode, the first insulating layer covering the capacitor,
wherein a refractive rate (n) of the low refractive thin film is less than or equal to 1.5.
6. The device according to claim 5 , wherein the organic electro luminescence diode includes:
a first electrode formed of transparent conductive material on the low refractive thin film, wherein the low refractive thin film includes a contact hole and a portion of the first electrode is within the contact hole contacting the switching device;
an organic light emission layer formed of organic luminous material on the first electrode; and
a second electrode formed of metal material to cover the organic light emission layer, the switching device and the capacitor.
7. The device according to claim 6 , wherein the switching device includes:
a buffer layer formed on the substrate;
a semiconductor layer formed at a predetermined area on the buffer layer;
a gate insulating film and a gate electrode sequentially deposited on the semiconductor layer;
a drain electrode connected to the semiconductor layer and connected to the first electrode of the organic electro luminescence diode; and
a source electrode connected to the semiconductor layer and connected to the capacitor.
8. The device according to claim 7 , wherein the capacitor includes:
a capacitor electrode formed on the buffer layer and separated from the semiconductor layer with a gap therebetween;
a first insulating layer covering the capacitor electrode;
a second insulating layer covering the capacitor electrode; and
a power electrode overlapping the capacitor electrode on the first insulating layer and connected to the source electrode.