| 摘要 |
PROBLEM TO BE SOLVED: To reduce manufacturing cost by confirming the operation of a TFT substrate before forming the film of EL(electroluminescence) material in an active matrix type EL display device to enhance the rate of non-defective products of final products. SOLUTION: In this display device, whether the TFT for drive is operates normally or not is judged by providing a capacitance for inspection which is connected to the drain region of the TFT for drive of a pixel part and by confirming the charge and discharge of the capacitance for inspection. As a result, it is possible to eliminate defective products before the film formation of the EL material and, thus, manufacturing cost can be reduced. |
