Display device and display device driving method

1. A display device comprising:

a display unit including a plurality of pixels, each of which emits light according to each of a plurality of data voltages;

a timing controller which divides an area of the display unit into an upper portion, a center portion and a bottom portion, divides one frame time into a plurality of sub-frames including a plurality of light emission sub-frames of a light emission period and a blank sub-frame of a blank period in which a black data signal is supplied, and generates an image data signal corresponding to each of the plurality of sub-frames; and

a data driver which applies a data voltage corresponding to the image data signal to the display unit,

wherein the timing controller

divides the upper portion into at least three groups including first to third groups, the center portion into at least four groups including fourth to seventh groups, and the bottom portion into at least three groups including eighth to tenth groups, and

differentiates a scan start time of a light emission sub-frame and a scan start time of the blank sub-frame of each group, and

increases the light emission period of a group of the first to the tenth groups and decrease the blank period of the group of the first to the tenth groups in proportion to an increase ratio of the light emission period as the group of the first to the tenth groups is closer to a middle of the center portion.

2. The display device of claim 1 , wherein the timing controller

orders the light emission period before the blank period in the plurality of sub-frames, and

sequentially delays scan start times of the second to fifth groups with reference to a scan start time of a first sub-frame of the first group and sequentially delays scan start times of the seventh to tenth groups with reference to a scan start time of a first sub-frame of the sixth group.

3. The display device of claim 2 , wherein the scan start time of the first sub-frame of the first group is behind the scan start time of the first sub-frame of the sixth group.

4. The display device of claim 1 , wherein the timing controller

orders the light emission period before the blank period in the plurality of sub-frames,

moves a scan start time of a first sub-frame of the second group to a point between a scan start time of a first sub-frame and a scan start time of a second sub-frame of the first group,

moves a scan start time of a first sub-frame of the third group to a point between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the second group,

moves a scan start time of a first sub-frame of the fourth group to a point between the scan start time of the first sub-frame and a scan start time of a second sub-frame of the third group,

moves a scan start time of a fourth sub-frame of the fifth group to a point between the scan start time of the first sub-frame and a scan start time of a second sub-frame of the fourth group,

moves a scan start time of a first sub-frame of the sixth group to a point between a scan start time of a fifth sub-frame and a scan start time of a blank sub-frame of the fifth group,

moves a scan start time of a fourth sub-frame of the seventh group to a point between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the sixth group,

moves a scan start time of the fifth sub-frame of the eighth group to a point between a scan start time of a third sub-frame and the scan start time of the fourth sub-frame of the seventh group,

moves a scan start time of a fourth sub-frame of the ninth group to a point between a scan start time of a first sub-frame and a scan start time of a second sub-frame of the eighth group, and

moves a scan start time of a first sub-frame of the tenth group to a point between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the ninth group.

5. The display device of claim 1 , wherein the timing controller

orders the light emission period before the blank period in the plurality of sub-frames of the first to third groups, orders the blank period before the light emission period in the plurality of sub-frames of the fourth and fifth groups, moves a scan start time of a first sub-frame of the fifth group to a point between a scan start time of a first sub-frame and a scan start time of a second sub-frame of the fourth group, and

orders the blank period before the light emission period in the plurality of sub-frames of the eighth to tenth groups, orders the light emission period before the blank period in the plurality of sub-frames of the sixth and seventh groups, and moves a scan start time of a first sub-frame of the sixth group to a point between a scan start time of a last sub-frame of a previous frame and a scan start time of the first sub-frame of a present frame of the fifth group.

6. The display device of claim 1 , wherein the timing controller

orders the light emission period before the blank period in the plurality of sub-frames of the first to third groups, orders the blank period before the light emission period in the plurality of sub-frames of the fourth and fifth groups, and moves a scan start time of a first sub-frame of the second group to a point between a scan start time of a fourth sub-frame and a scan start time of a fifth sub-frame of the first group, moves a scan start time of a first sub-frame of the third group to a point between a scan start time of a third sub-frame and a scan start time of a fourth sub-frame of the second group, moves a scan start time of a first sub-frame of the fourth group to a point between a scan start time of a fifth sub-frame of a previous frame and a scan start time of a blank sub-frame of the third group, and moves a scan start time of a first sub-frame of the fifth group to a point between the scan start time of the first sub-frame and a scan start time of a second sub-frame of the fourth group, and

orders the blank period before the light emission period in the plurality of sub-frames of the eighth to tenth groups, orders the light emission period before the blank period in the plurality of sub-frames of the sixth and seventh groups, and moves a scan start time of a first sub-frame of the sixth group to a point between a scan start time of a third sub-frame and a scan start time of a fourth sub-frame of the fifth group, moves a scan start time of a third sub-frame of the eighth group to a point between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the seventh group, and moves a scan start time of a second sub-frame of the ninth group to a point between a scan start time of a second sub-frame and the scan start time of the third sub-frame of the eighth group.

7. The display device of claim 1 , wherein the timing controller

controls an order of the plurality of sub-frames of the first to third groups to be a light emission period and a blank period, orders the blank period before the light emission period in the plurality of sub-frames of the fourth and fifth groups, and moves a scan start time of a first sub-frame of the fifth group to a point between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the fourth group, and

orders the blank period before the light emission period in the plurality of sub-frames of the eighth to tenth groups, orders the light emission period before the blank period in the plurality of sub-frames of the sixth and seventh groups, and moves a scan start time of a fourth sub-frame of the sixth group to a point between a scan start time of a first sub-frame and a scan start time of a second sub-frame of the fifth group.

8. The display device of claim 1 , wherein the timing controller

orders the light emission period before the blank period in the plurality of sub-frames of the first to third groups, orders the blank period before the light emission period in the plurality of sub-frames of the fourth and fifth groups, and moves a scan start time of a first sub-frame of the fifth group to a point between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the fourth group, and

orders the blank period before the light emission period in the plurality of sub-frames of the eighth to tenth groups, orders the light emission period before the blank period in the plurality of sub-frames of the sixth and seventh groups, and moves a scan start time of a fourth sub-frame of the sixth group to a point between the scan start time of the first sub-frame and a scan start time of a second sub-frame of the fifth group.

9. The display device of claim 1 , wherein the timing controller

orders the light emission period before the blank period in the plurality of sub-frames of the first to fifth groups, and controls a light emission period of the first group to be the shortest and a light emission period of the fifth group to be the longest, and

orders the blank period before the light emission period in the plurality of sub-frames of the sixth to tenth groups, and controls a light emission of the tenth group to be a shortest and a light emission period of the sixth group to be a longest.

10. The display device of claim 1 , wherein the timing controller

orders the light emission period before the blank period in the plurality of sub-frames of the first to third groups,

orders the blank period before the light emission period in the plurality of sub-frames of the fourth and fifth groups,

orders the blank period before the light emission period in the plurality of sub-frames of the eighth to tenth groups, and

orders the light emission period before the blank period in the plurality of sub-frames of the sixth and seventh groups.

11. A method for driving a display device, comprising:

(a) comprising dividing an area of a display unit into an upper portion, a bottom portion and a center portion;

(b) comprising dividing the upper portion into at least three groups including first to third groups, the center portion into at least four groups including fourth to seventh groups, and the bottom portion into at least three groups including eighth to tenth groups; and

(c) comprising dividing one frame time into a plurality of sub-frames of a light emission period and a blank sub-frame of a blank period that supplies a black data signal, differentiating a scan start time of light emission sub-frames and a scan start time of the blank sub-frame of the first to tenth groups, and increasing the light emission period of a group of the first to the tenth groups and decreasing the blank period of the group of the first to the tenth groups in proportional to an increase ratio of the light emission period as the group of the first to the tenth groups is closer to a middle of the center portion.

12. The method for driving the display device of claim 11 , wherein the (c) further comprises ordering the light emission period before the blank period in the plurality of sub-frames, sequentially delaying scan start times of the second to fifth groups with reference to a scan start time of a first sub-frame of the first group, and sequentially delaying scan start times of the seventh to tenth groups with reference to a scan start time of a first sub-frame of the sixth group.

13. The method for driving the display device of claim 11 , wherein the (c) further comprises

ordering the light emission period before the blank period in the plurality of sub-frames,

moving a scan start time of a first sub-frame of the second group to a point between a scan start time of a first sub-frame and a scan start time of a second sub-frame of the first group,

moving a scan start time of a first sub-frame of the third group to between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the second group,

moving a scan start time of a first sub-frame of the fourth group to between the scan start time of the first sub-frame and a scan start time of a second sub-frame of the third group,

moving a scan start time of a fourth sub-frame of the fifth group to between the scan start time of the first sub-frame and a scan start time of a second sub-frame of the fourth group,

moving a scan start time of a first sub-frame of the sixth group to between a scan start time of a fifth sub-frame and a scan start time of a blank sub-frame of the fifth group,

moving a scan start time of a fourth sub-frame of the seventh group to between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the sixth group,

moving a scan start time of a fifth sub-frame of the eighth group to between a scan start time of a third sub-frame and the scan start time of the fourth sub-frame of the seventh group,

moving a scan start time of a fourth sub-frame of the ninth group to between a scan start time of a first sub-frame and a scan start time of a second sub-frame of the eighth group, and

moving a scan start time of a first sub-frame of the tenth group to between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the ninth group.

14. The method for driving the display device of claim 11 , wherein the (c) further comprises

ordering the light emission period before the blank period in the plurality of sub-frames of the first to third groups, ordering the blank period before the light emission period in the plurality of sub-frames of the fourth and fifth group, and moving a scan start time of a fifth sub-frame of the fifth group to between a scan start time of a first sub-frame and a scan start time of a second sub-frame of the fourth group, and

ordering the blank period before the light emission period in the plurality of sub-frames of the eighth to tenth groups, ordering the light emission period before the blank period in the plurality of sub-frames of the sixth and seventh groups, and moving a scan start time of a first sub-frame of the sixth group to between a scan start time of a last sub-frame of a previous frame and a scan start time of a first sub-frame of a present frame of the fifth group.

15. The method for driving the display device of claim 11 , wherein the (c) further comprises:

ordering the light emission period before the blank period in the plurality of sub-frames of the first to third groups, ordering the blank period before the light emission period in the plurality of sub-frames of the fourth and fifth groups, moving a scan start time of a first sub-frame of the second group to between a scan start time of a fourth sub-frame and a scan start time of a fifth sub-frame of the first group, moving a scan start time of a first sub-frame of the third group to between a scan start time of a third sub-frame and a scan start time of a fourth sub-frame of the second group, moving a scan start time of a first sub-frame of the fourth group to between a scan start time of a fifth sub-frame of a previous frame and a scan start time of a blank sub-frame of the third group, and moving a scan start time of a first sub-frame of the fifth group to between the scan start time of the first sub-frame and a scan start time of a second sub-frame of the fourth group, and

ordering the blank period before the light emission period in the plurality of sub-frames of the eighth to tenth groups, ordering the light emission period before the blank period in the plurality of sub-frames of the sixth and seventh groups, moving a scan start time of a first sub-frame of the sixth group to between a scan start time of a third sub-frame and a scan start time of a fourth sub-frame of the fifth group, moving a scan start time of a third sub-frame of the eighth group to between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the seventh group, and moving a scan start time of a second sub-frame of the ninth group to between a scan start time of a second sub-frame and the scan start time of the third sub-frame of the eighth group.

16. The method for driving the display device of claim 11 , wherein the (c) further comprises:

ordering the light emission period before the blank period in the plurality of sub-frames of the first to third groups, ordering the blank period before the light emission period in the plurality of sub-frames of the fourth and fifth groups, and moving a scan start time of a first sub-frame of the fifth group to between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the fourth group,

ordering the blank period before the light emission period in the plurality of sub-frames of the eight to tenth groups, ordering the light emission period before the blank period in the plurality of sub-frames of the sixth and seventh groups, and moving a scan start time of a fourth sub-frame of the sixth group to between a scan start time of a first sub-frame and a scan start time of a second sub-frame of the fifth group.

17. The method for driving the display device of claim 11 , wherein the (c) further comprises:

ordering the light emission period before the blank period in the plurality of sub-frames of the first to third groups, ordering the blank period before the light emission period in the plurality of sub-frames of the fourth and fifth groups, and moving a scan start time of a first sub-frame of the fifth group to between a scan start time of a second sub-frame and a scan start time of a third sub-frame of the fourth group, and

ordering the blank period before the light emission period in the plurality of sub-frames of the eighth to tenth groups, ordering the light emission period before the blank period in the plurality of sub-frames of the sixth and seventh groups, and moving a scan start time of a fourth sub-frame of the sixth group to between the scan start time of the first sub-frame and a scan start time of a second sub-frame of the fifth group.

18. The method for driving the display device of claim 11 , wherein the (c) further comprises:

ordering the light emission period before the blank period in the plurality of sub-frames of the first to fifth groups, and controlling the light emission period of the first period to be the shortest and the light emission period of the fifth group to be the longest, and

ordering the blank period before the light emission period in the plurality of sub-frames of the sixth to tenth groups, and controlling the light emission period of the tenth group to be the shortest and the light emission period of the sixth group to be the longest.

19. The method for driving the display device of claim 11 , wherein the (c) further comprises:

ordering the light emission period before the blank period in the plurality of sub-frames of the first to third groups, and ordering the blank period before the light emission period in the plurality of sub-frames of the fourth and fifth groups, and

ordering the blank period before the light emission period in the plurality of sub-frames of the eighth to tenth groups, and ordering the light emission period before the blank period in the plurality of sub-frames of the sixth and seventh groups.