| 摘要 |
To provide a discharge lamp lighting device in which the initial state of discharge in a wiring of a circuit on the secondary side of a transformer in the discharge lamp lighting device is accurately detected and the operation thereof stops and which can be applied to a large-scaled liquid crystal display device. The discharge lamp lighting device according to the present invention includes a transformer 5, a transformer drive circuit 4, and a control circuit 3 for controlling the transformer drive circuit 4. The transformer drive circuit 4 drives the primary side of the transformer 5, and a discharge lamp 6 is lit on by being connected to the secondary side of the transformer 5. The discharge lamp lighting device further includes a discharge detecting pattern 13 having one end connected to the ground and the other end connected to the control circuit 3, and means that detects a voltage induced by electromagnetic waves received by the discharge detecting pattern 13 and stops the power supply to the secondary side of the transformer 5, and at least one part of the discharge detecting pattern 13 is disposed adjacent to a portion of a high-voltage wiring of a circuit on the secondary side of the transformer 5.
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