Electronic pen, electronic device, and method of controlling the same

An electronic pen comprising:

• a first pen module including a first pen core and a pattern sensing unit,
• wherein the first pen core contains a material used for writing which is used for a medium, and
• wherein the pattern sensing unit is configured to obtain a handwritten image in order for the electronic pen to obtain first location information,
• wherein the handwritten image is an image made by a user with the first pen core, and
• wherein the first location information is defined as a location of the electronic pen with respect to the medium;
• a second pen module including a second pen core,
• wherein the second pen core is configured to generate at least one of a magnetic field and an electric field in order for an electronic device to obtain second location information, and
• wherein the second location information is defined as a location of the electronic pen with respect to the electronic device;
• a main body which has a cavity,
• wherein the first pen module is disposed at a first end of the main body and the second pen module is fixed to at least one of the first end and a second end which is an opposite end of the main body,
• wherein the first end includes a first pen core accommodating part and a light transmitting unit, and
• wherein the first pen core is supported by being inserted into the first pen core accommodating part so that a part of the first pen core is exposed, and
• wherein the pattern sensing unit is positioned and fixed coaxially with the light transmitting unit;
• and
• a control unit which is configured to generate a signal for controlling the first pen module and the second pen module.