| 摘要 |
An offset cancel output circuit of source drivers for driving liquid crystal displays which is capable of appropriately cancelling out an offset voltage from an output amplifier to thereby prevent degradation in display quality. The offset cancel output circuit includes an operational amplifier with a non-inverted input port to which a reference voltage is applied, and an input capacitor and an output capacitor with each one end thereof connected to an inverted input port of the operational amplifier. The offset cancel output circuit further includes a switching element circuit which has a first field effect transistor connected between the inverted input port and an output port of the operational amplifier and controlled to turn on during a reset operation. During the reset operation and the normal output operation, a first potential equal to the reference voltage is applied to the substrate of the first field effect transistor.
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