| 摘要 |
A portable electronic device includes a display unit; an input detection unit that detects an input to the display unit, and a lock control unit that sets or releases a locked state for a part or all of functions of the portable electronic device when a predetermined input is detected by the input detection unit, wherein the predetermined input includes inputs, in which a preset screen operation is continuously performed by a predetermined number of times in an area of the display unit.
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