Information Input Device

An information input device comprising:

• a sensor portion configured to generate an output corresponding to a position of a writing tool inside a predetermined detection area, in the course of writing that is performed on a recording medium using the writing tool, the recording medium being set on the information input device such that the recording medium corresponds to the detection area;
• and
• a processor configured to perform processes comprising:
• acquiring position information based on the output of the sensor portion, the position information being information corresponding to the position of the writing tool;
• storing trajectory information in a storage medium, the trajectory information corresponding to a trajectory of writing performed using the writing tool, and being formed of a series of the position information as a result of chronologically storing the acquired position information in the storage medium;
• determining whether the position of the writing tool corresponding to the acquired position information is included in a second area, which is an area obtained by excluding a first area from the detection area, the first area being an area of a predetermined width along an outer edge of the detection area;
• prohibiting processing that adds the acquired position information to the trajectory information and stores the updated trajectory information, when it is determined that the position of the writing tool corresponding to the acquired position information is not included in the second area;
• and
• performing processing that adds the acquired position information to the trajectory information and stores the updated trajectory information, when it is determined that the position of the writing tool corresponding to the acquired position information is included in the second area.