Method for providing screen by using flexible display, and electronic device supporting same

A method for providing a screen using a flexible display by an electronic device, the method comprising:

• detecting a change of a state of the electronic device from a first state or a second state to a third state in which a second housing is unfolded about a hinge unit at a designated angle or more from a first housing and a third housing, through at least one sensor of the electronic device;
• based on detecting the change of the state of the electronic device to the third state, identifying whether an external input device communicatively connected to the electronic device through a communication module of the electronic device exists;
• based on identifying that the external input device communicatively connected to the electronic device exists, identifying a type of the external input device;
• based on the type of the external input device being a first type, displaying a screen corresponding to a first mode, through a first area of the display, disposed on the first housing, a second area of the display, disposed on the second housing, and a third area of the display, disposed on the third housing;
• and
• based on the type of the external input device being a second type different from the first type, displaying a screen corresponding to a second mode different from the first mode, through a first area of the display, disposed on the first housing, a second area of the display, disposed on the second housing, and a third area of the display, disposed on the third housing.

An electronic device, comprising:

• a housing including a first housing part and a second housing part configured to movably engage with the first housing part between a retracted position and an extended position;
• a flexible display coupled to the first housing part and the second housing part such that a size of an area of the flexible display that is visible from a front side of the housing changes as the second housing part is moved between the retracted position and the extended position;
• at least one sensor configured to detect a movement of the second housing part;
• a communication module including communication circuitry;
• at least one processor including processing circuitry;
• and
• memory storing instructions that, when executed by the at least one processor individually or collectively, cause the electronic device to:
• identify that a state of the electronic device is changed from a first state in which the size of the area of the flexible display is less than a designated size to a second state in which the size of the area of the flexible display is greater than or equal to the designated size through the at least one sensor;
• based on identifying that the state of the electronic device is changed from the first state to second state, identify an external input device communicatively connected to the electronic device exists;
• based on identifying that the external input device communicatively connected to the electronic device exists, identify a type of the external input device;
• based on the type of the external input device being a first type, display a screen corresponding to a first mode, through the first area, the second area, and the third area of the flexible display;
• and
• based on the type of the external input device being a second type different from the first type, display a screen corresponding to a second mode different from the first mode, through the first area, the second area, and the third area of the flexible display.