Display apparatus and driving method thereof
A display apparatus includes a display panel configured to display an image, a gate driver configured to supply gate signals to the display panel, a data driver connected with the display panel, and a timing controller configured to control the gate driver, wherein the timing controller controls an output type of the gate driver so that one gate signal of the gate signals is applied per one gate line or per at least two gate lines, based on an image applied from an external device.
1 . A display apparatus comprising:
a display panel configured to display an image;
a gate driver configured to supply gate signals to the display panel;
a data driver connected with the display panel; and
a timing controller configured to control the gate driver,
wherein the gate driver comprises:
a shift register configured to output the gate signals;
a level shifter configured to output scan clock signals that drive the shift register; and
an output change circuit configured to control an output of the shift register or the level shifter based on an output change signal provided from the timing controller,
wherein the timing controller is configured to:
when a driving frequency of the display apparatus is a first frequency, generate the output change signal as a first logic that deactivates the output change circuit in order to apply one gate signal of the gate signals per one gate line, and
when the driving frequency is a second frequency smaller than the first frequency, generate the output change signal as a second logic that activates the output change circuit in order to apply the one gate signal per at least two gate lines during an active period where an image is displayed and generate the output change signal as the first logic in order to apply the one gate signal of the gate signals per one gate line during a blank period where an image is not displayed.
2 . The display apparatus of claim 1 , wherein the output change circuit is activated or deactivated based on control by the timing controller to control the gate signals output from the shift register or control the scan clock signals output from the level shifter.
3 . The display apparatus of claim 1 , wherein during a resolution change period of the display panel during which an apparatus is operated under a changed driving condition when a resolution is changed by the image applied from an external device, the gate signals are not output during the resolution change period.
4 . The display apparatus of claim 1 , wherein the output change circuit comprises:
a first-type transistor including a gate electrode connected with an output change signal line through which the output change signal is transferred, a first electrode connected with a first output terminal of the shift register included in the gate driver and a first gate line, and a second electrode connected with a second output terminal of the shift register and a second gate line; and
a second-type transistor including a gate electrode connected with the output change signal line, a first electrode connected with the second output terminal of the shift register, and a second electrode connected with the second gate line, and
the first-type transistor differs from the second-type transistor.