Display device and controlling method of display device

A display device comprising:

• a display panel comprising a plurality of light emitting diodes and a plurality of pixel driver circuits for driving the plurality of light emitting diodes;
• a panel driver configured to control operations of the plurality of pixel driver circuits, the panel driver comprising a plurality of driver integrated circuits (ICs) and a first switching element;
• a timing controller comprising a second switching element;
• and
• a plurality of signal transmission lines connecting the first switching element and the second switching element,
• wherein the timing controller is configured to:
• control the first switching element and the second switching element to transmit an image data signal from the timing controller to the panel driver through a signal transmission line of the plurality of signal transmission lines during a first time period and to not receive a state data signal from the panel driver to the timing controller during the first time period, and
• control the first switching element and the second switching element to receive the state data signal regarding the display panel from the panel driver through the signal transmission line of the plurality of signal transmission lines during a second time period different from the first time period and to not transmit the image data signal from the timing controller to the panel driver during the second time period.