Organic light emitting device
View Patent ↗An organic light emitting device includes a plurality of colored pixels, and a white pixel, wherein the respective pixels include; a first electrode, a second electrode which faces the first electrode, and a light emitting member disposed between the first electrode and the second electrode, and the white pixel further includes; a first semi-transparent member disposed on the first electrode to form a microcavity with the second electrode.
1. An organic light emitting device comprising:
a plurality of colored pixels, and a white pixel, wherein the respective pixels comprise:
a first electrode;
a second electrode which faces the first electrode; and
a light emitting member disposed between the first electrode and the second electrode, and
the white pixel further comprises:
a first semi-transparent member disposed on the first electrode to form a microcavity with the second electrode.
2. The organic light emitting device of claim 1 , wherein
the first semi-transparent member is Ag, Al or a combination of Ag and Al.
3. The organic light emitting device of claim 1 , wherein the light emitting member comprises:
a plurality of sub-emitting layers which emit light having different wavelengths; and
the light having different wavelengths are combined to emit a substantially white light.
4. The organic light emitting device of claim 3 , wherein
the white light has a yellowish tint.
5. The organic light emitting device of claim 3 , wherein
the first semi-transparent member is formed at only a portion of a region through which the white light passes.
6. The organic light emitting device of claim 3 , wherein
the plurality of colored pixels includes a red pixel, a green pixel, and a blue pixel, and each of the colored pixels further comprise a color filter formed below the first electrode.
7. The organic light emitting device of claim 3 , wherein
a pixel having the lowest emission efficiency among the plurality of colored pixels further comprises:
a second semi-transparent member disposed on the first electrode to form the microcavity together with the second electrode.
8. The organic light emitting device of claim 7 , wherein
the pixel having the lowest emission efficiency is a blue pixel.
9. The organic light emitting device of claim 7 , wherein
the second semi-transparent member is Ag, Al or a combination of Ag and Al.
10. The organic light emitting device of claim 7 , wherein
the second semi-transparent member is formed over substantially the entire region through which the white light passes.
11. The organic light emitting device of claim 7 , wherein
the plurality of colored pixels comprise a red pixel and a green pixel and the red pixel and the green pixel further comprise a color filter formed below the first electrode.
12. The organic light emitting device of claim 1 , further comprising:
a driving thin film transistor connected to the first electrode including a polycrystalline semiconductor; and
a switching thin film transistor connected to the driving thin film transistor including an amorphous semiconductor.
13. The organic light emitting device of claim 12 , wherein
the driving thin film transistor comprises;
a driving input electrode formed on the polycrystalline semiconductor,
a driving output electrode which faces the driving input electrode on the polycrystalline semiconductor, and
a driving control electrode formed on the driving input electrode and the driving output electrode.
14. The organic light emitting device of claim 13 , wherein
the switching thin film transistor comprises;
a switching control electrode formed below the amorphous semiconductor,
a switching input electrode formed on the amorphous semiconductor, and
a switching output electrode which faces the switching input electrode on the amorphous semiconductor and is connected to the driving control electrode.