DISPLAY DEVICE WITH BUILT-IN PHOTOSENSOR

摘要

PROBLEM TO BE SOLVED: To prepare a display device with a built-in photosensor which is stable at low costs and wherein malfunction due to external light and backlight light is eliminated.

SOLUTION: A unit pixel of an array substrate of the display device with the built-in photosensor includes a thin film transistor for pixel switching and a thin film transistor for photodetection formed on a glass substrate 1 and a pixel electrode 9 controlled by the thin film transistor for pixel switching. Each channel layer of the thin film transistor for pixel switching and the thin film transistor for photodetection is constituted of a two layer structure of a fine crystal silicon film 4 having sensitivity in a wavelength band of near IR light and a non-doped amorphous silicon film 23 having sensitivity to visible light of external light.

COPYRIGHT: (C)2009,JPO&INPIT