Electronic device including flexible display

An electronic device comprising:

• a housing including a first housing and a second housing slidably connected to the first housing, wherein the second housing slides with respect to the first housing;
• a flexible display including a first area and a second area extending from the first area, wherein the second area of the flexible display is configured to be drawn into or drawn out of the housing according to the movement of the second housing;
• a support plate coupled to the second housing to slide with the second housing, wherein the support plate includes at least one magnet disposed at a lateral side of the support plate such that an N-pole and an S-pole are aligned in a first direction in which the second housing slides;
• a Hall sensor structure including Hall sensors and a sensor flexible printed circuit board (FPCB), wherein the Hall sensors are disposed on the sensor FPCB and configured to detect a magnetic field of the at least one magnet on the support plate coupled to the second housing;
• a guide member configured to protrude toward a rear side of the electronic device, wherein a lateral side of a protruded portion of the guide member faces the lateral side of the support plate at which the magnet is disposed, and wherein the at least one Hall sensor is disposed at the lateral side of the protruded portion of the guide member through the sensor FPCB and faces the lateral side of the support plate,
• memory storing instructions;
• a printed circuit board (PCB) disposed in the first housing;
• and
• at least one processor disposed on the PCB and electrically connected to the Hall sensor structure,
• wherein the at least one magnet has a length shorter than the first distance between the Hall sensors, and is longer than half of the first distance, and
• wherein the instructions, when being executed by the at least one processor individually or collectively, cause the electronic device to:
• receive, via the PCB and the FPCB, a signal detected by the Hall sensors indicative of a relative position of the second housing with respect to the first housing, and
• identify a moving distance which the second housing slides with respect to the first housing based on the detection of the magnetic field obtained by the Hall sensors.