Display device
A display device includes a display panel, a data driving circuit, a scan driving circuit, and a driving controller. The driving controller receives an image signal and a control signal and controls the data and scan driving circuits to display an image on the display panel. The driving controller divides the display panel into first and second display regions based on the image signal, and outputs start and masking signals indicating starts of one frame and the second display region, respectively. First and second frames have first and second durations, respectively. The scan driving circuit sequentially drives scan lines in synchronization with the start signal and stop the driving of scan lines, corresponding to the second display region, of the scan lines, in response to the masking signal.
1. A driving method of a display device, the method comprising:
dividing a display panel into a first display region and a second display region in a way such that the first display region is driven at a first driving frequency and the second display region is driven at a second driving frequency;
outputting a start signal and a masking signal, the masking signal indicating a start of the second display region;
sequentially driving a plurality of scan lines in synchronization with the start signal, and
stopping the driving of scan lines, corresponding to the second display region, of the plurality of scan lines in response to the masking signal,
wherein an active level of the start signal indicates a start of each of a plurality of frames,
wherein the number of the active level of the start signal during a predetermined time in a first mode is greater than the number of the active level of the start signal during the predetermined time in a second mode, and
wherein a first frame among the plurality of frames has a first duration, and a second frame among the plurality of frames has a second duration different from the first duration, during the first mode.
2. The method of claim 1 , wherein the second duration of the second frame is shorter than the first duration of the first frame, during a first mode.
3. The method of claim 2 , wherein the first duration of the first frame is equal to the second duration of the second frame, during a second mode different from the first mode.
4. The method of claim 3 , wherein the first duration of the first frame during the first mode is equal to the first duration of the first frame during the second mode.
5. The method of claim 3 , wherein the first display region and the second display region are driven with a predetermined frequency, during the second mode, and
during the first mode, the first display region is driven with a first driving frequency higher than the predetermined frequency and the second display region is driven with a second driving frequency lower than the predetermined frequency.
6. The method of claim 1 , further comprising:
outputting an image data signal which corresponds to the first display region and the second display region to a data driving circuit during the first frame, and
outputting the image data signal which corresponds to the first display region during the second frame.
7. A driving controller, comprising:
a controller which receives an image signal and a control signal and output an image data signal,
wherein the controller divides a display panel into a first display region and a second display region and outputs a start signal indicating a start of each of a first frame and a second frame following the first frame and a masking signal indicating a start of the second display region,
the controller outputs the image data signal which corresponds to the first display region and the second display region to a data driving circuit during the first frame,
the controller outputs the image data signal which corresponds to the first display region during the second frame, and
a first frame has a first duration, and a second frame following the first frame has a second duration.
8. The driving controller of claim 7 , wherein the second duration of the second frame is shorter than the first duration of the first frame, during a first mode.
9. The driving controller of claim 8 , wherein the first duration of the first frame is equal to the second duration of the second frame, during a second mode different from the first mode.
10. The driving controller of claim 9 , wherein the first duration of the first frame during the first mode is equal to the first duration of the first frame during the second mode.
11. The driving controller of claim 9 , wherein the controller drives the first display region and the second display region with a predetermined frequency, during the second mode.
12. The driving controller of claim 11 , wherein the controller drives the first display region with a first driving frequency higher than the predetermined frequency and drives the second display region with a second driving frequency lower than the predetermined frequency, during the first mode.