Organic light emitting diode display comprising a dot that includes two blue pixels

1. An organic light emitting device comprising:

a first pixel having a first area displaying red;

a second pixel having the second area displaying green;

a third pixel having a third area displaying blue;

a fourth pixel having a fourth area displaying blue, the first pixel, second pixel, third pixel and fourth pixel positioned adjacent to each other on a plane and forming a dot, and wherein the size of the first area, second area, third area and fourth area are the same,

a signal controller configured to receive and input image signal, the input image signal including a red input luminance for an individual red pixel, a green input luminance for an individual green pixel, and a blue input luminance for an individual blue pixel, the signal controller generating a red output signal based on the red input luminance for the individual red pixel, a green output signal based on the green input luminance for the individual green pixel, a first blue output signal based on the blue input luminance for the individual blue pixel and a second blue output signal based on the blue input luminance for the individual blue pixel; and

a data controller generating a first pixel data voltage based on the red output signal, a second pixel data voltage based on the green output signal, a third pixel data voltage based on the first blue output signal and a fourth pixel data voltage based on the second blue output signal;

wherein the first to fourth pixels respectively comprise a switching element receiving a corresponding data voltage and an organic light emitting element connected to the switching element,

a sum of areas of the first to fourth pixels is substantially the same as an area of the dot, and

the third pixel and the fourth pixel are simultaneously supplied with third pixel and fourth pixel data voltages that are smaller than the first pixel and the second pixel data voltages at a same time, and, the third pixel data voltage and the fourth pixel data voltage are each, respectively, less than a data voltage for only one blue pixel based on the blue input luminance for the individual blue pixel in a dot including only the individual red pixel, individual green pixel and individual blue pixel positioned adjacent to each other in a plane in which the individual blue pixel has an area equal to the third area of the third pixel.

2. The organic light emitting device of claim 1 , wherein

a sum of an area of the third pixel and the fourth pixel is larger than an individual area of the first pixel and the second pixel.

3. The organic light emitting device of claim 2 , wherein

the first to fourth pixels respectively comprise an organic light emitting material, and

the organic light emitting material of the third and fourth pixels has a shorter life than a life of the organic light emitting material of the first and second pixels.

4. The organic light emitting device of claim 3 , wherein

the first to fourth pixels form a rectangle having long sides and short sides, and

the first to fourth pixels are arranged in a line in an extended direction of the short sides.

5. The organic light emitting device of claim 4 , wherein

a length of each the long sides of the first to fourth pixels is four times a length of the short sides.

6. The organic light emitting device of claim 2 , wherein

the first to fourth pixels form a 2×2 matrix.

7. The organic light emitting device of claim 6 , wherein

each of the first to fourth pixels is a square.

8. The organic light emitting device of claim 2 , wherein

areas of each of the first to fourth pixels are substantially the same.

9. The organic light emitting device of claim 1 further comprising:

a scanning signal line transmitting a scanning signal to the third pixel; and

a driving voltage line transmitting a driving voltage to the third pixel,

wherein the scanning signal line and the driving voltage line cross each other.

10. The organic light emitting device of claim 1 , wherein

scanning signals applied to the third and fourth pixels are the same.

11. The organic light emitting device of claim 1 , wherein

a number of grays that the third pixel and the fourth pixel may respectively represent is the same as a number of grays that the first pixel and the second pixel may represent.

12. The organic light emitting device of claim 1 , wherein

a number of grays that the third pixel and the fourth pixel may respectively represent is less than a number of grays that the first and second pixels may represent.