Source driver and display device including the same

1. A display device comprising:

a display panel configured to display an image corresponding to each of a plurality of frames; and

a source driver configured to drive the display panel,

wherein the plurality of frames includes a first frame operating at a first operating frequency, and a second frame operating at a frequency higher than the first operating frequency,

wherein the first frame includes a plurality of sections, and

wherein the source driver operates in a normal driving mode during some of the plurality of sections, and operates in a low-power driving mode during others of the plurality of sections.

2. The display device of claim 1 , wherein the plurality of sections comprises a write cycle section, a hold cycle section, and a blank section including a standby section, and

the some of the plurality of sections comprise the write cycle section and the hold cycle section, and

the others of the plurality of sections comprise the standby section.

3. The display device of claim 2 , wherein the source driver receives a first driving voltage and a second driving voltage and outputs a data signal, and

wherein the source driver in the normal driving mode receives the first driving voltage and the second driving voltage, and the source driver in the low-power driving mode receives the second driving voltage.

4. The display device of claim 3 , wherein a level of the second driving voltage is uniform in the normal driving mode and the low-power driving mode, wherein a power consumption of the source driver is defined as a product of the second driving voltage and a circuit current, and

wherein a power consumption of the source driver in the normal driving mode is higher than the power consumption of the source driver in the low-power driving mode.

5. The display device of claim 3 , wherein, during each of the write cycle section and the hold cycle section, the data signal has a waveform having a level, which is changed between a first voltage level and a second voltage level higher than the first voltage level, and

wherein, during the standby section, the data signal is not output from the source driver.

6. The display device of claim 5 , wherein the blank section further includes a setup section between the hold cycle section and the standby section, and a hold section after the standby section.

7. The display device of claim 6 , wherein the data signal is maintained at the second voltage level during the setup section and the hold section.

8. The display device of claim 6 , wherein at least one of a length of the setup section and a length of the hold section is determined based on the first operating frequency.

9. The display device of claim 3 , wherein, in the low-power driving mode, the first driving voltage is not provided to the source driver.

10. The display device of claim 2 , wherein the display panel is configured to:

operate in a first mode operating at a predetermined operating frequency; or

operate in a second mode operating at a variable operating frequency, and

wherein the image corresponding to the first frame is displayed in the second mode.

11. The display device of claim 10 , further comprising:

a driving controller configured to control operations of the display panel and the source driver and to receive an image signal,

wherein, in the second mode, the image signal is input at a random period.

12. The display device of claim 11 , wherein the driving controller is configured to:

count a cycle of a previous frame;

count a cycle of a current frame; and

determine an end time point of the standby section by comparing a cycle count of the previous frame with a cycle count of the current frame.

13. An electronic device comprising a source driver comprising:

a first input terminal configured to receive a first driving voltage;

a second input terminal configured to receive a second driving voltage; and

a logic circuit configured to:

receive image data corresponding to a first frame or a second frame, wherein the first frame is operated at a first operating frequency and includes a plurality of sections, and the second frame is operated at a frequency higher than the first operating frequency; and

output a data signal,

wherein the source driver operates in a normal driving mode during some of the plurality of sections and operates in a low-power driving mode during others of the plurality of sections.

14. The electronic device of claim 13 , wherein, in the low-power driving mode, the first driving voltage is not provided to the first input terminal.

15. The electronic device of claim 13 , wherein a level of the second driving voltage is uniform in the normal driving mode and the low-power driving mode.

16. The electronic device of claim 13 , wherein a current flowing through the second input terminal in the normal driving mode is greater than a current flowing through the second input terminal in the low-power driving mode.

17. The electronic device of claim 13 , wherein the plurality of sections comprises a write cycle section, and a blank section including a standby section, and

the some of the plurality of sections comprise the write cycle section, and

the others of the plurality of sections comprise the standby section.

18. The electronic device of claim 17 , wherein the data signal during the write cycle section has a level changed between a first voltage level and a second voltage level higher than the first voltage level, and

wherein the data signal is not output from the logic circuit during the standby section.

19. The electronic device of claim 18 , wherein the blank section further includes a setup section between the write cycle section and the standby section, and a hold section after the standby section, and

wherein the data signal is maintained at the second voltage level during the setup section and the hold section.

20. The electronic device of claim 19 , wherein at least one of a length of the setup section and a length of the hold section is determined based on the first operating frequency.