Display device and control method therefor

A display device, comprising:

• a casing having an opening;
• a display structure comprising a display that is configured to be extended from or retracted into the casing through the opening;
• a motor gear assembly connected to move the display structure;
• and
• a sensor configured to measure a lateral distance between the display structure and an inner wall of the casing;
• wherein the distance changes according to withdrawal of the display structure from the casing, and
• wherein the display device is configured to measure a withdrawal range of the display structure by checking a degree of withdrawal of the display based on a value measured by the sensor.

A method of operating a display device with a retractable display, the display device comprising a casing having an opening with the retractable display configured to be inserted into or withdrawn from the casing through the opening by operation of a motor gear assembly, the display device further comprising a sensor configured and arranged to measure a distance between the display and an inner wall of the casing, the method comprising:

• checking a position of the display based on values measured by the sensor;
• receiving a mode signal initiated by a user;
• driving a motor of the motor gear assembly based on the mode signal initiated by the user;
• and
• determining whether the display has been moved according to the mode signal by the user based on values measured by the sensor;
• wherein checking the position of the display based on values measured by the sensor comprising measuring, with the sensor, a distance between the sensor and a mode control structure, wherein the mode control structure has a shape that varies along a movement direction of the display.