Ink annotation sharing method and system

An ink annotation sharing method for sharing an ink annotation input by using an electronic book terminal,

• the electronic book terminal including a display device capable of displaying an electronic book, a touch sensor that detects a finger, a pen sensor that detects a pen, and an integrated circuit connected to the touch sensor and the pen sensor,
• the ink annotation sharing method comprising:
• displaying, by the integrated circuit, text of the electronic book on the display device;
• detecting, by the integrated circuit using the touch sensor or the pen sensor, user operation which indicates a place of an annotation for the text;
• and
• outputting, by the integrated circuit, place data indicating the place of the ink annotation and indicating which one of the touch sensor or the pen sensor has detected the user operation.

A system comprising:

• an electronic book terminal including:
• a display device capable of displaying an electronic book;
• a touch sensor that detects a finger;
• a pen sensor that detects a pen;
• and
• an integrated circuit connected to the touch sensor and the pen sensor;
• wherein
• the integrated circuit
• displays text of the electronic book on the display device,
• detects, using the touch sensor or the pen sensor, user operation which indicates a place of an annotation for the text, and
• outputs place data indicating the place of the ink annotation and indicating which one of the touch sensor or the pen sensor has detected the user operation.