CONTACT AREA SENSOR AND DISPLAY DEVICE PROVIDED WITH THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a light, thin and miniaturized contact area sensor. SOLUTION: Concerning this contact area sensor, each of pixels, the area sensor has, has an EL element as a light source and a photodiode as a photoelectric converting element and the operation of the EL element and the photodiode is controlled by a TFT.