| 摘要 |
A horizontal drive unit (3) of a display has a first current drive section (34) for supplying, according to the control data a forward drive current to a light-emitting device and a second current drive section (35) for supplying a predetermined reverse current to the light-emitting device. The horizontal drive unit section includes a voltage comparing section (36) for judging whether or not the an opposite voltage required to supply the predetermined reverse current is lower than a predetermined voltage and detects an abnormality, if any, of the light-emitting device on the basis of the judgme nt by the voltage comparing section (36). Even when the light-emitting device i s connected to the horizontal drive unit (3), an abnormal light-emitting devic e where a leak current in the reverse direction is generated, if any, can be detected.
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