Display device

A display device comprising:

• a driving controller which receives an image signal, and a signal including a command for entering a low power mode, or a command for terminating the low power mode, and generates a synchronization signal;
• a panel driver which operates in response to a control signal provided from the driving controller;
• and
• a display panel which is controlled by the panel driver,
• wherein the driving controller
• generates a count value by counting a clock of the synchronization signal, when receiving the command for entering or terminating the low power mode, and
• changes the control signal from a first state to a second state different from the first state, when the count value is equal to or greater than a count reference value, and
• wherein at least one selected from a frequency of the synchronization signal and the count reference value is constant.

An electronic device comprising a display device comprising:

• a driving controller which receives an image signal, and a signal including a command for entering a low power mode, or a command for terminating the low power mode, and generates a synchronization signal;
• a panel driver which operates in response to a control signal provided from the driving controller;
• and
• a display panel which is controlled by the panel driver, wherein the display panel selectively operates in a first mode for operating at a specific driving frequency or a second mode for operating at a variable driving frequency,
• wherein the panel driver includes:
• a data driving circuit which provides a data signal to the display panel in synchronization with the synchronization signal, and
• wherein the driving controller
• changes the control signal based on the synchronization signal after a specific time period, when receiving the command for entering the low power mode or the command for terminating the low power mode, and
• wherein a frequency of the synchronization signal is changed from a first frequency to a second frequency, which is equal to or greater than the first frequency, when receiving the command for entering the low power mode or the command for terminating the low power mode.