An electronic device comprising: a housing; an always on display disposed in the housing, wherein at least a part of the display is exposed through one surface of the housing; a power management circuit disposed inside the housing; and a processor disposed inside the housing and operably connected to the display and the power management circuit, wherein the processor is configured to: control the display to operate based on a first designated scheme in a first designated state; control the display to operate based on a second designated scheme corresponding to a second designated state when an occurrence of a first event for switching a state of the electronic device to the second designated state is confirmed; and control the power management circuit to supply to the processor, when in the second designated state, a voltage lower than a voltage supplied to the processor in the first designated state, and the display is configured to: display at least one object in the second designated state, and change a display state of the at least one object and display the changed display state on the display when information indicating confirmation of an occurrence of a second event with respect to the electronic device is acquired from the processor; wherein the changed display state includes flickering of the displayed at least one object, and wherein the at least one object is displayed during a first time period and the at least one object is not displayed during a second time period, and wherein the second time period is longer than the first time period, wherein the display includes a display panel and a signal driving circuit comprising a source driver and a gate driver, wherein the source driver and the gate driver are configured to output scan line signals and output data line signals to the display panel and wherein a power consumption of the source driver and the gate driver is lower in the second time period than the first time period. a housing; an always on display disposed in the housing, wherein at least a part of the display is exposed through one surface of the housing; a power management circuit disposed inside the housing; and a processor disposed inside the housing and operably connected to the display and the power management circuit, wherein the processor is configured to: control the display to operate based on a first designated scheme in a first designated state; control the display to operate based on a second designated scheme corresponding to a second designated state when an occurrence of a first event for switching a state of the electronic device to the second designated state is confirmed; and control the power management circuit to supply to the processor, when in the second designated state, a voltage lower than a voltage supplied to the processor in the first designated state, and control the display to operate based on a first designated scheme in a first designated state; control the display to operate based on a second designated scheme corresponding to a second designated state when an occurrence of a first event for switching a state of the electronic device to the second designated state is confirmed; and control the power management circuit to supply to the processor, when in the second designated state, a voltage lower than a voltage supplied to the processor in the first designated state, and the display is configured to: display at least one object in the second designated state, and change a display state of the at least one object and display the changed display state on the display when information indicating confirmation of an occurrence of a second event with respect to the electronic device is acquired from the processor; wherein the changed display state includes flickering of the displayed at least one object, and wherein the at least one object is displayed during a first time period and the at least one object is not displayed during a second time period, and wherein the second time period is longer than the first time period, wherein the display includes a display panel and a signal driving circuit comprising a source driver and a gate driver, wherein the source driver and the gate driver are configured to output scan line signals and output data line signals to the display panel and wherein a power consumption of the source driver and the gate driver is lower in the second time period than the first time period. display at least one object in the second designated state, and change a display state of the at least one object and display the changed display state on the display when information indicating confirmation of an occurrence of a second event with respect to the electronic device is acquired from the processor; wherein the changed display state includes flickering of the displayed at least one object, and wherein the at least one object is displayed during a first time period and the at least one object is not displayed during a second time period, and wherein the second time period is longer than the first time period, wherein the display includes a display panel and a signal driving circuit comprising a source driver and a gate driver, wherein the source driver and the gate driver are configured to output scan line signals and output data line signals to the display panel and wherein a power consumption of the source driver and the gate driver is lower in the second time period than the first time period.