Photo sensor, method of manufacturing photo sensor, and display apparatus

A method of manufacturing a photo sensor, the method comprising:

• forming a light receiving unit, a first adjacent unit, and a second adjacent unit on a substrate, such that:
• the light receiving unit includes an amorphous semiconductor material,
• the first and second adjacent units are formed as one body with the light receiving unit and the first and second adjacent units are separated from each other by the light receiving unit;
• and
• forming a first photo sensor electrode and a second photo sensor electrode such that the first photo sensor electrode is electrically connected to the first adjacent unit and the second photo sensor electrode is electrically connected to the second adjacent unit,
• wherein at least one of the first adjacent unit and the second adjacent unit includes a crystalline semiconductor material.