Organic light emitting display device and electronic device

1. An organic light-emitting device, comprising:

an array substrate having a white sub-pixel region; and

an organic electro-luminescent multi-layer structure disposed on the white sub-pixel region of the array substrate comprising a top electrode, a first bottom electrode and an emission layer therebetween, wherein the first bottom electrode has a thinner first portion and a thicker second portion for providing a wavelength shift of light in different directions, and wherein the thinner first portion and the thicker second portions are alternatively arranged.

2. The organic light-emitting device as claimed in claim 1 , further comprising red, blue and green sub-pixel areas disposed on the array substrate, wherein the red, blue and green sub-pixel areas comprise a second, a third and a fourth bottom electrode, respectively.

3. The organic light-emitting device as claimed in claim 2 , wherein at least two of the second, third and fourth bottom electrodes have the same thickness.

4. The organic light-emitting device as claimed in claim 3 , wherein the first, second, third and fourth bottom electrodes are a single layer.

5. The organic light-emitting device as claimed in claim 3 , wherein the first, second, third and fourth bottom electrodes comprise ITO, IZO, ZnO:Sn, ZnO:V, ZnO:Co, ZnO:Al, ZnO:Ga, ZnO:Ti, or ZnO:In.

6. The organic light-emitting device as claimed in claim 2 , wherein the second, third and fourth bottom electrodes have the same thickness.

7. The organic light-emitting device as claimed in claim 2 , wherein the second, third and fourth bottom electrodes have different thicknesses.

8. The organic light-emitting device as claimed in claim 1 , wherein the thinner first portion is circular or square.

9. The organic light-emitting device as claimed in claim 1 , wherein the thicker second portion is circular or square.

10. The organic light-emitting device as claimed in claim 1 , wherein a proportion of area of the thicker second portion to the emission area of the white sub-pixel area is not less than 10%.

11. The organic light-emitting device as claimed in claim 1 , wherein a proportion of area of the thicker second portion to the emission area of the white sub-pixel area is between 40% and 60%.

12. The organic light-emitting device as claimed in claim 1 , wherein the organic light-emitting device is a top-emitting organic light-emitting device, and the top electrode comprises a transparent conductive material.

13. An electronic device, comprising:

the organic light-emitting device as claimed in claim 1 ; and

an input unit coupled to the organic light-emitting device and operative to provide input signals to the organic light-emitting device to generate images.

14. The electronic device as claimed in claim 13 , wherein the electronic device is a mobile phone, digital camera, PDA (personal digital assistant), notebook computer, desktop computer, television, GPS, car display, aviation display, digital photo frame or portable DVD player.

15. An organic light-emitting device, comprising:

an array substrate having a white sub-pixel region;

an organic electro-luminescent multi-layer structure disposed on the white sub-pixel region of the array substrate comprising a top electrode, a first bottom electrode and an emission layer therebetween, wherein the first bottom electrode has a thinner first portion and a thicker second portion for providing a wavelength shift of light in different directions; and

red, blue and green sub-pixel areas disposed on the array substrate, wherein the red, blue and green sub-pixel areas comprise a second, a third and a fourth bottom electrode, respectively,

wherein at least one of the second, third and fourth bottom electrodes has a thinner first portion and a thicker second portion.

16. An organic light-emitting device, comprising:

an array substrate having a white sub-pixel region; and

an organic electro-luminescent multi-layer structure disposed on the white sub-pixel region of the array substrate comprising a top electrode, a first bottom electrode and an emission layer therebetween, wherein the first bottom electrode has a thinner first portion and a thicker second portion for providing a wavelength shift of light in different directions,

wherein the first bottom electrode is a composite layer including a first transparent material layer and a second transparent material layer thereon.

17. The organic light-emitting device as claimed in claim 16 , wherein the thinner first portion comprises the first transparent material layer and the thicker second portion comprises the first and second transparent material layers.

18. The organic light-emitting device as claimed in claim 16 , wherein the first transparent material layer and the second transparent material layer have the same thickness and comprise different conductive materials.

19. The organic light-emitting device as claimed in claim 16 , wherein the first transparent material layer and the second transparent material layer comprise the same conductive material, and have different thicknesses.

20. The organic light-emitting device as claimed in claim 16 , wherein the thinner first portion and the thicker second portions are alternatively arranged.