| 摘要 |
A first switch circuit is provided between a gradation voltage selection circuit and an output circuit. The output circuit includes a test switch that disconnects the gradation voltage selection circuit from the output circuit in a test mode; a test switch that connects, in the test mode, the gradation voltage selection circuit to a tester connection terminal TESR1; and a test switch that connects, in the test mode, the output circuit to a tester connection terminal TESR2. A second switch circuit is provided between a gradation voltage generation circuit and the gradation voltage selection circuit to disconnect, in the test mode, the gradation voltage generation circuit from the gradation voltage selection circuit.
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