An electronic device comprising: a flexible touch screen (201, 202) having flexibility, including a substantially flat shape, and including: a display unit configured to display an image; and a bending unit configured to sense a user bending input; and a body part (301, 302) disposed below the flexible touch screen (201, 202) wherein the body part (301, 302) includes: a controller configured to control a transition from a lock state to an unlock state of the flexible touch screen (201, 202) based on the user bending input; and a memory configured to store a predefined bending action used to transition from the lock state to the unlock state of the flexible touch screen (201, 202); characterised in that: the body part (301, 302) has no flexibility; at least one side of the top surface of the body part (301, 302) is curved, wherein a spaced groove is formed in a thickness direction between the at least one side of the top surface of the body part (301, 302) and the flexible touch screen (201, 202); and in that the electronic device further includes a flexible material disposed at the spaced groove. a flexible touch screen (201, 202) having flexibility, including a substantially flat shape, and including: a display unit configured to display an image; and a bending unit configured to sense a user bending input; and a display unit configured to display an image; and a bending unit configured to sense a user bending input; and a body part (301, 302) disposed below the flexible touch screen (201, 202) wherein the body part (301, 302) includes: a controller configured to control a transition from a lock state to an unlock state of the flexible touch screen (201, 202) based on the user bending input; and a memory configured to store a predefined bending action used to transition from the lock state to the unlock state of the flexible touch screen (201, 202); characterised in that: the body part (301, 302) has no flexibility; at least one side of the top surface of the body part (301, 302) is curved, wherein a spaced groove is formed in a thickness direction between the at least one side of the top surface of the body part (301, 302) and the flexible touch screen (201, 202); and in that the electronic device further includes a flexible material disposed at the spaced groove. a controller configured to control a transition from a lock state to an unlock state of the flexible touch screen (201, 202) based on the user bending input; and a memory configured to store a predefined bending action used to transition from the lock state to the unlock state of the flexible touch screen (201, 202); characterised in that: the body part (301, 302) has no flexibility; at least one side of the top surface of the body part (301, 302) is curved, wherein a spaced groove is formed in a thickness direction between the at least one side of the top surface of the body part (301, 302) and the flexible touch screen (201, 202); and in that the electronic device further includes a flexible material disposed at the spaced groove. the body part (301, 302) has no flexibility; at least one side of the top surface of the body part (301, 302) is curved, wherein a spaced groove is formed in a thickness direction between the at least one side of the top surface of the body part (301, 302) and the flexible touch screen (201, 202); and in that the electronic device further includes a flexible material disposed at the spaced groove.