Display device and electronic apparatus

1. A display device comprising:

a pixel comprising a first sub-pixel having a first light-emitting element and a second sub-pixel having a second light-emitting element, each of the first and second light-emitting elements comprising a pixel electrode, an electroluminescent layer, and an opposite electrode;

a first source driver which supplies a first video signal for the first sub-pixel; and

a second source driver which supplies a second video signal for the second sub-pixel,

wherein the pixel electrode and the opposite electrode of the first light-emitting element have light-transmitting properties,

wherein the pixel electrode of the second light-emitting element has reflectiveness;

wherein the electroluminescent layers of the first light-emitting element and the second light-emitting element are provided in a same layer,

wherein the opposite electrodes of the first light-emitting element and the second light-emitting element are provided in a same layer, and

wherein a reflective layer is provided so as to overlap with the opposite electrode of the first light-emitting element.

2. A device according to claim 1 , further comprising gate drivers which control the first sub-pixel and the second sub-pixel.

3. A device according to claim 1 , further comprising a first gate driver which control the first sub-pixel and a second gate driver which control the second sub-pixel.

4. A device according to claim 1 , wherein the number of transistors including the first sub-pixel and the number of transistors including the second sub-pixel are the same.

5. A device according to claim 1 , wherein the number of transistors including the first sub-pixel and the number of transistors including the second sub-pixel are different.

6. A device according to claim 1 , wherein each of the first light-emitting element and the second light-emitting element emits one of red, green, and blue light.

7. A device according to claim 1 , wherein the first light-emitting element and the second light-emitting element emit white light.

8. A device according to claim 1 , wherein the first source driver is connected to a first digital data line and the second source driver is connected to a second digital data line.

9. A device according to claim 1 , wherein the first source driver is connected to a digital data line and the second source driver is connected to an analog data line.

10. A device according to claim 1 , wherein the first source driver is connected to a first analog data line and the second source driver is connected to a second analog data line.

11. An electronic device using the display device according to claim 1 .

12. A device according to claim 11 , wherein said electronic device is selected from the group consisting of a television apparatus, a digital camera, a digital video camera, a cellular phone device, a portable information terminal, a portable game machine, a monitor, a personal computer, a tablet PC, an audio reproducing device, and an image reproducing device provided with a recording medium.

13. The display device according to claim 1 ,

wherein the pixel is provided over a surface of a light-transmitting substrate;

wherein a first display region using the first sub-pixel is provided over the surface of the substrate; and

wherein a second display region using the second sub-pixel is provided over an opposite surface of the substrate.

14. A display device comprising:

a pixel comprising a first sub-pixel having a first light-emitting element and a second sub-pixel having a second light-emitting element over a substrate, each of the first and second light-emitting elements comprising a pixel electrode, an electroluminescent layer, and an opposite electrode;

a first source driver which supplies a first video signal for the first sub-pixel; and

a second source driver which supplies a second video signal for the second sub-pixel,

wherein the opposite electrodes of the first light-emitting element and the second light-emitting element are provided in a same layer and have light-transmitting properties,

wherein the electroluminescent layers of the first light-emitting element and the second light-emitting element are provided in a same layer, and

wherein a first reflective layer is provided so as to overlap with the opposite electrode of the first light-emitting element.

15. A device according to claim 14 , further comprising gate drivers which control the first sub-pixel and the second sub-pixel.

16. A device according to 14 , further comprising a first gate driver which control the first sub-pixel and a second gate driver which control the second sub-pixel.

17. A device according to 14 , wherein the number of transistors including the first sub-pixel and the number of transistors including the second sub-pixel are the same.

18. A device according to 14 , wherein the number of transistors including the first sub-pixel and the number of transistors including the second sub-pixel are different.

19. A device according to 14 , wherein each of the first light-emitting element and the second light-emitting element emits one of red, green, and blue light.

20. A device according to 14 , wherein the first light-emitting element and the second light-emitting element emit white light.

21. A device according to 14 , wherein the first source driver is connected to a first digital data line and the second source driver is connected to a second digital data line.

22. A device according to 14 , wherein the first source driver is connected to a digital data line and the second source driver is connected to an analog data line.

23. A device according to 14 , wherein the first source driver,is connected to a first analog data line and the second source driver is connected to a second analog data line.

24. The display device according to 14 ,

wherein a first display region using the first sub-pixel is provided over the surface of the substrate; and

wherein a second display region using the second sub-pixel is provided over an opposite surface of the substrate.

25. An electronic device using the display device according to claim 14 .

26. A device according to 25 , wherein said electronic device is selected from the group consisting of a television apparatus, a digital camera, a digital video camera, a cellular phone device, a portable information terminal, a portable game machine, a monitor, a personal computer, a tablet PC, an audio reproducing device, and an image reproducing device provided with a recording medium.

27. A display device comprising:

a pixel comprising a first sub-pixel having a first light-emitting element and a second sub-pixel having a second light-emitting element over a substrate, each of the first and second light-emitting elements comprising a pixel electrode, an electroluminescent layer, and an opposite electrode;

a first source driver which supplies a first video signal for the first sub-pixel; and

a second source driver which supplies a second video signal for the second sub-pixel,

wherein the opposite electrodes of the first light-emitting element and the second light-emitting element are provided in a same layer and have light-transmitting properties,

wherein the electroluminescent layers of the first light-emitting element and the second light-emitting element are provided in a same layer,

wherein a first reflective layer is provided so as to overlap with the opposite electrode of the first light-emitting element, and

wherein the first light-emitting element emits light in a first direction and the second light-emitting element emits light in a second diction.

28. A device according to 27 , further comprising gate drivers which control the first sub-pixel and the second sub-pixel.

29. A device according to 27 , further comprising a first gate driver which control the first sub-pixel and a second gate driver which control the second sub-pixel.

30. A device according to 27 , wherein the number of transistors including the first sub-pixel and the number of transistors including the second sub-pixel are the same.

31. A device according to 27 , wherein the number of transistors including the first sub-pixel and the number of transistors including the second sub-pixel are different.

32. A device according to 27 , wherein each of the first light-emitting element and the second light-emitting element emits one of red, green, and blue light.

33. A device according to 27 , wherein the first light-emitting element and the second light-emitting element emit white light.

34. A device according to 27 , wherein the first source driver is connected to a first digital data line and the second source driver is connected to a second digital data line.

35. A device according to 27 , wherein the first source driver is connected to a digital data line and the second source driver is connected to an analog data line.

36. A device according to 27 , wherein the first source driver is connected to a first analog data line and the second source driver is connected to a second analog data line.

37. The display device according to 27 ,

wherein a first display region using the first sub-pixel is provided over the surface of the substrate; and

wherein a second display region using the second sub-pixel is provided over an opposite surface of the substrate.

38. An electronic device using the display device according to claim 27 .

39. A device according to claim 38 , wherein said electronic device is selected from the group consisting of a television apparatus, a digital camera, a digital video camera, a cellular phone device, a portable information terminal, a portable game machine, a monitor, a personal computer, a tablet PC, an audio reproducing device, and an image reproducing device provided with a recording medium.