Electronic device comprising display operating with state for low power consumption, and method therefor

An electronic device comprising:

• a display;
• an illuminance sensor;
• and
• one or more processors, including first processing circuitry, second processing circuitry, and third processing circuitry,
• wherein the third processing circuitry is configured to, while the display operates in a first display operating state, of the display, for lower power consumption, transmit, to the second processing circuitry from among the first and second processing circuitry, an illuminance level obtained using the illuminance sensor for maintaining a first operating state, of the first processing circuitry, for lower power consumption,
• wherein the second processing circuitry is configured to, in response to reception of the illuminance level from the third processing circuitry, transmit, to the display, a command to change a brightness level of an image displayed on the display that operates in the first display operating state, and
• wherein a state of the first processing circuitry to maintain operating in the first operating state, while the brightness level of the image is changed from a first brightness level to a second brightness level in accordance with the command.