| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an EL display device capable of measuring or monitoring current flowing through a power supply line without physically changing or operating mechanism etc. of the power supply line. <P>SOLUTION: In the EL display device, a switch SW1 being turned off using an output open function of a power supply circuit 12, a cathode voltage Vss is not transmitted, an output terminal takes on a high impedance condition and, a probing being done into a pad P1 of the cathode voltage Vss output terminal with a probe 304, an ammeter 303 which measures a current Ia is disposed between the probe 304 and an external power supply 471, making an adjustment time cathode voltage Vsst equal to an image display time cathode voltage Vss. <P>COPYRIGHT: (C)2009,JPO&INPIT |
