Patent ID: 8294470

Claim:
A one sheet test device for use in testing a sheet substrate comprising a plurality of panels, a plurality of first wires that are arranged in a first direction between the plurality of panels to be connected to corresponding ones of the panels, and a plurality of second wires that are arranged in a second direction other than the first direction between the plurality of panels and connected to corresponding ones of the panels, the test device comprising: a plurality of voltage application units that are selectively connected to the plurality of first and second wires, respectively, to apply a selected one of the first voltage and the second voltage to the panels through the corresponding first and second wires; a test unit that controls the plurality of voltage application units to selectively measure an on-current and off-current of each of the plurality of panels; and a plurality of resistors that are connected between the plurality of second wires and the plurality of voltage application units, respectively.