Handwriting input apparatus and input method using the handwriting input apparatus, display divice for inputting of the handwriting input apparatus

PURPOSE: An electronic pen, an input method using the same, and a display device for the same are provided to implement a display device for electronic pen input without additional processes or components for pattern formation. CONSTITUTION: An electronic pen generates a light in a display direction through a light source(610). The electronic pen takes a photograph of the display through a camera unit(620). The electronic recognizes a BM(Black Matrix) pattern of the display device in the photographed image(630). The electronic pen detects a light source irradiating position on the display device(640). [Reference numerals] (610) Emitting light source of an electronic pen; (620) Photographing a camera; (630) Recognizing a pattern of a BM; (640) Detecting an input location; (650) Outputting an input location; (AA) Start; (BB) End