Patent ID: 6815975
Filing Date: 2004-11-09
Classification: G09G,H05B,Y02B

Abstract:
An inspection method for an active matrix substrate comprising:a first step of providing an active matrix substrate including a plurality of signal lines, a plurality of scanning lines, a plurality of voltage supply lines, and a plurality of pixels, each of the plurality of pixels being connected with one of the signal lines, one of the scanning lines, and one of the voltage supply lines, each of the plurality of pixels including a pixel select transistor connected with the one signal line and the one scanning line and an operating transistor, a gate of the operating transistor being connected with the pixel select transistor, one of a source and a drain of the operating transistor being connected with the one voltage supply line, and the other of the source and the drain of the operating transistor being in an open state; a second step of charging a parasitic capacitor between the gate of the operating transistor and the one voltage supply line by supplying a potential from an inspection device; a third step of measuring discharge current by using the inspection device when discharging the parasitic capacitor; and a fourth step of determining whether or not a defect exists in each of the plurality of pixels by using the inspection device based on a value of the discharge current.