To enable a finger writing input, to improve operability and to surely prevent the mischievous writing by a ballpoint pen, etc., by having a constitution that detection by the simultaneous operations of plural intersected points which are adjacent with each other of each intersected point of a detection means is fetched as finger writing input information.

A detection means detecting a contact or proximity operation and the location by the matrix array of plural optical intersected points Sa is provided corresponding to the screen of a color liquid crystal display device. The detection by the simultaneous operations of plural optical intersected points Sa which are adjacent with each other of each optical intersected points Sa of this detection means is fetched as finger writing input information. This detection means is classified into the means in which the mutual space of each optical intersected point Sa is narrow and the resolution of a contact type detection is high and the satisfactory recognition performance for a finger writing input can be obtained. Namely, the partial area of a touch panel 5 can be functioned as a finger writing input area 52.