Portable terminal and method of setting and releasing use restriction therefor

A portable terminal having a front surface and a rear surface, the portable terminal comprising:

• a display device provided on the front surface;
• a rear password input device provided on the rear surface to receive a setting password for setting use restriction for the portable terminal or a releasing password for releasing the use restriction set for the portable terminal;
• an input section selection device that receives from a user selection of an input section selected from the group consisting of the display device and the rear password input device into which the setting password is to be input in setting the use restriction and the releasing password is to be input in releasing the use restriction;
• a face recognizing device that recognizes a face of the user to create recognition information for the setting when the setting password is input if the rear password input device is selected as the input section, and to create recognition information for the releasing when the releasing password is input if the rear password input device is selected as the input section in the releasing, respectively;
• and
• a control device that stores the setting password, the input section, and the recognition information in a storage device if the setting password is input into the selected input section while setting the use restriction, and that performs comparison of the input releasing password, the selected input section, and the created recognition information for the releasing with the stored setting password, the stored input section, and the stored recognition information if the releasing password is input to release the use restriction,
• wherein the control device releases the use restriction, provided that the required conditions are satisfied, the required conditions selected from the group consisting of:
• the setting and releasing input sections are identical to each other as the display device, and the setting and releasing passwords are matched to each other;
• the setting and releasing input sections are identical to each other as the rear password input device, and either (i) the recognition information for the setting and the recognition information for the releasing are matched to each other, and the setting and releasing passwords are matched to each other, or (ii) the recognition information for the setting and the recognition information for the releasing are different from each other, and the setting and releasing passwords are symmetrical to each other;
• and
• the setting and releasing input sections are different from each other, and either (i) the recognition information is not obtained by recognizing the face, and the setting and releasing passwords are matched to each other, or (ii) the recognition information is obtained by recognizing the face, and the setting and releasing passwords are symmetrical to each other.

A method of setting and releasing use restriction for a portable terminal, the method comprising:

• setting the use restriction for the portable terminal including a display device provided on a front surface of a body thereof and a rear password input device provided on a rear surface of the body;
• and
• releasing the use restriction set for the portable terminal, provided that required conditions are satisfied,
• wherein the setting of the use restriction comprises:
• receiving from a user selection of an input section selected from the group consisting of the display device and the rear password input device into which a setting password for the setting of the use restriction is to be input;
• receiving from the user selection of whether the setting password is to be input in a forward direction that the display unit faces the user or a reverse direction that the rear password input unit faces the user if the rear password input unit is selected as the input section;
• inputting the setting password into the selected input section;
• and
• storing the input setting password, the selected input section, and a selected input direction while setting the use restriction;
• and
• the releasing of the use restriction comprises:
• receiving from the user selection of an input section selected from the group consisting of the display device and the rear password input device into which a releasing password is to be input;
• receiving from the user selection of whether the releasing password is to be input in the forward direction that the display device faces the user or the reverse direction that the rear password input device faces the user, if the rear password input device is selected as the input section;
• inputting the releasing password into the selected input section;
• and
• comparing the input releasing password, the selected input section, and a selected input direction for the releasing with the setting password, the input section, and the input direction, which are stored in the setting of the use restriction;
• and
• releasing the use restriction, provided that the required conditions are satisfied, the required conditions selected from the group consisting of:
• the setting and releasing input sections are identical to each other as the display device, and the setting and releasing passwords are matched to each other;
• the setting and releasing input sections are identical to each other as the rear password input device, and either (i) the input directions for the setting and the releasing are identical to each other, and the setting and releasing passwords are matched to each other, or (ii) the input directions for the setting and the releasing are different from each other, and the setting and releasing passwords are symmetrical to each other;
• and
• the setting and releasing input sections are different from each other, and either (i) the input directions for the setting and the releasing are the reverse directions, and the setting and releasing input passwords are matched to each other, or (ii) the input directions for the setting and the releasing are forward directions, and the input setting and releasing passwords are symmetrical to each other.

A method of setting and releasing use restriction for a portable terminal, the method comprising:

• setting the use restriction for the portable terminal including a display device provided on a front surface of a body thereof and a rear password input device provided on a rear surface of the body;
• and
• releasing the use restriction set for the portable terminal, provided that required conditions are satisfied,
• wherein the setting of the use restriction comprises:
• receiving from a user selection of an input section selected from the group consisting of the display device and the rear password input device into which a setting password is to be input;
• inputting the setting password into the selected input section;
• creating recognition information of a face of the user when the setting password is input if the rear password input device is selected as the input section;
• and
• storing the input setting password, the selected input section, and the created recognition information while setting the use restriction;
• and
• the releasing of the use restriction comprises:
• receiving from the user selection of one of the input sections of the display device and the rear password input device into which a releasing password is to be input;
• inputting the releasing password into said one input section;
• creating recognition information of the face of the user when the releasing password is input if the rear password input device is selected as the input section;
• comparing the input releasing password, the selected input section and the created recognition information for the releasing with the setting password, the input section, and the recognition information which are stored in the setting of the use restriction;
• and
• treleasing the use restriction, provided that the required conditions are satisfied, the required conditions selected from the group consisting of:
• the setting and releasing input sections are identical to each other as the display device, and the setting password and the releasing password are matched to each other,
• the setting and releasing input sections are identical to each other as the rear password input device, and either (i) two pieces of recognition information are matched to each other, and the setting and releasing passwords are matched to each other, or (ii) the two pieces of recognition information are different from each other, and the setting and releasing passwords are symmetrical to each other;
• and
• the setting and releasing input sections are different from each other, and either (i) the recognition information is not obtained by recognizing the face, and the setting and releasing passwords are matched to each other, or (ii) the recognition information is obtained by recognizing the face, and the setting and releasing passwords are symmetrical to each other.