Display device and driving method thereof

1 . A display device, comprising:

a first pixel circuit including a first driving transistor, a first initialization transistor, a first anode initialization transistor, and a first light emitting diode emitting a first color, the first light emitting diode including a first anode and a first cathode;

a second pixel circuit including a second driving transistor, a second initialization transistor, a second anode initialization transistor, and a second light emitting diode emitting a second color different from the first color, the second light emitting diode including a second anode and a second cathode; and

a third pixel circuit including a third driving transistor, a third initialization transistor, a third anode initialization transistor, and a third light emitting diode emitting a third color different from the first color and the second color, the third light emitting diode including a third anode and a third cathode,

wherein:

a first anode initialization voltage is applied to the first anode through the first anode initialization transistor,

a second anode initialization voltage is applied to the second anode through the second anode initialization transistor, the second anode initialization voltage being different from the first anode initialization voltage,

a third anode initialization voltage is applied to the third anode through the third anode initialization transistor, the third anode initialization voltage being same as the first anode initialization voltage, and

a cathode voltage commonly applied to the first cathode, the second cathode, and the third cathode.

2 . The display device as claimed in claim 1 , wherein:

the first pixel circuit and the third pixel circuit are coupled to a first data line, and

the second pixel circuit is coupled to a second data line.

3 . The display device as claimed in claim 1 , wherein:

the first pixel circuit and the second pixel circuit are coupled to a first data line, and

the third pixel circuit is coupled to a second data line.

4 . The display device as claimed in claim 1 , wherein:

a first voltage is applied to a gate terminal of the first driving transistor through the first initialization transistor,

a second voltage is applied to a gate terminal of the second driving transistor through the second initialization transistor,

a third voltage is applied to a gate terminal of the third driving transistor through the third initialization transistor, and

the first voltage, the second voltage, and the third voltage have a same value.

5 . The display device as claimed in claim 4 , wherein:

the first voltage is applied to the gate terminal of the first driving transistor in a first initialization period, and

the second voltage is applied to the gate terminal of the second driving transistor in the first initialization period.

6 . The display device as claimed in claim 5 , wherein:

the first anode initialization voltage is applied to the first anode in a second initialization period, and

the second anode initialization voltage is applied to the second anode in the second initialization period.

7 . The display device as claimed in claim 6 , wherein:

the third voltage is applied to the gate terminal of the third driving transistor in a third initialization period different from the first initialization period, and

the third anode initialization voltage is applied to the third anode in a fourth initialization period different from the second initialization period.

8 . The display device as claimed in claim 1 , wherein:

the first anode initialization voltage is applied to a first initialization line connected to the first anode through the first anode initialization transistor,

the second anode initialization voltage is applied to a second initialization line connected to the second anode through the second anode initialization transistor, and

the third anode initialization voltage is applied to a third initialization line connected to the third anode through the third anode initialization transistor.

9 . The display device as claimed in claim 8 , wherein:

the first initialization line and the second initialization line are separated from each other.

10 . The display device as claimed in claim 9 , wherein:

the third initialization line is connected to the first initialization line.

11 . The display device as claimed in claim 1 , wherein:

the cathode voltage is smaller than the first anode initialization voltage.

12 . The display device as claimed in claim 1 , wherein:

the first anode initialization voltage is smaller than the second anode initialization voltage.

13 . The display device as claimed in claim 1 , wherein an area of a light emitting surface of the second light emitting diode is less than an area of a light emitting surface of the first light emitting diode.

14 . The display device as claimed in claim 13 , wherein

the first color is red, and

the second color is green.

15 . The display device as claimed in claim 1 , further comprising:

a first scan line; and

a second scan line different from the first scan line, wherein

the first initialization transistor and the second initialization transistor are coupled to the first scan line, and

the first anode initialization transistor and the second anode initialization transistor are coupled to the second scan line.

16 . The display device as claimed in claim 15 , wherein:

a first scan signal is applied to the first scan line before a second scan signal is applied to the second scan line.

17 . An electronic device, comprising:

an external source supplying image signals;

a timing controller supplying converted image signals based on the image signals;

a data driver supplying data voltages based on the converted image signals, the data driver connected to a first data line and a second data line different from the first data line; and

a display unit, the display unit comprising:

a first pixel circuit including a first driving transistor, a first initialization transistor, a first anode initialization transistor, and a first light emitting diode emitting a first color, the first light emitting diode including a first anode and a first cathode;

a second pixel circuit including a second driving transistor, a second initialization transistor, a second anode initialization transistor, and a second light emitting diode emitting a second color different from the first color, the second light emitting diode including a second anode and a second cathode; and

a third pixel circuit including a third driving transistor, a third initialization transistor, a third anode initialization transistor, and a third light emitting diode emitting a third color different from the first color and the second color, the third light emitting diode including a third anode and a third cathode,

wherein:

a first anode initialization voltage is applied to the first anode through the first anode initialization transistor,

a second anode initialization voltage is applied to the second anode through the second anode initialization transistor, the second anode initialization voltage being different from the first anode initialization voltage,

a third anode initialization voltage is applied to the third anode through the third anode initialization transistor, the third anode initialization voltage being same as the first anode initialization voltage, and

a cathode voltage commonly applied to the first cathode, the second cathode, and the third cathode.

18 . The electronic device as claimed in claim 17 , wherein:

the first pixel circuit and the third pixel circuit are coupled to the first data line, and

the second pixel circuit is coupled to the second data line.

19 . The electronic device as claimed in claim 17 , wherein:

the first pixel circuit and the second pixel circuit are coupled to the first data line, and

the third pixel circuit is coupled to the second data line.

20 . The electronic device as claimed in claim 17 , wherein:

a first voltage is applied to a gate terminal of the first driving transistor through the first initialization transistor,

a second voltage is applied to a gate terminal of the second driving transistor through the second initialization transistor,

a third voltage is applied to a gate terminal of the third driving transistor through the third initialization transistor, and

the first voltage, the second voltage, and the third voltage have a same value.

21 . The electronic device as claimed in claim 20 , wherein:

the first voltage is applied to the gate terminal of the first driving transistor in a first initialization period, and

the second voltage is applied to the gate terminal of the second driving transistor in the first initialization period.

22 . The electronic device as claimed in claim 21 , wherein:

the first anode initialization voltage is applied to the first anode in a second initialization period, and

the second anode initialization voltage is applied to the second anode in the second initialization period.

23 . The electronic device as claimed in claim 22 , wherein:

the third voltage is applied to the gate terminal of the third driving transistor in a third initialization period different from the first initialization period, and

the third anode initialization voltage is applied to the third anode in a fourth initialization period different from the second initialization period.

24 . The electronic device as claimed in claim 17 , wherein:

the first anode initialization voltage is applied to a first initialization line connected to the first anode through the first anode initialization transistor,

the second anode initialization voltage is applied to a second initialization line connected to the second anode through the second anode initialization transistor, and

the third anode initialization voltage is applied to a third initialization line connected to the third anode through the third anode initialization transistor.

25 . The electronic device as claimed in claim 24 , wherein:

the first initialization line and the second initialization line are separated from each other.

26 . The electronic device as claimed in claim 24 , wherein:

the third initialization line is connected to the first initialization line.

27 . The electronic device as claimed in claim 17 , wherein:

the cathode voltage is smaller than the first anode initialization voltage.

28 . The electronic device as claimed in claim 17 , wherein:

the first anode initialization voltage is smaller than the second anode initialization voltage.

29 . The electronic device as claimed in claim 17 , wherein an area of a light emitting surface of the second light emitting diode is less than an area of a light emitting surface of the first light emitting diode.

30 . The electronic device as claimed in claim 29 , wherein

the first color is red, and

the second color is green.

31 . The electronic device as claimed in claim 17 , further comprising:

a first scan line; and

a second scan line different from the first scan line, wherein

the first initialization transistor and the second initialization transistor are coupled to the first scan line, and

the first anode initialization transistor and the second anode initialization transistor are coupled to the second scan line.

32 . The electronic device as claimed in claim 31 , wherein:

a first scan signal is applied to the first scan line before a second scan signal is applied to the second scan line.