| 摘要 |
A data driver includes a gray scale voltage generating circuit includes resistance elements connected in series, and configured to generate a plurality of gray scale voltages; a gray scale voltage selecting circuit configured to select a selection gray scale voltage from among the plurality of gray scale voltages based on a digital signal. The gray scale voltage selecting circuit includes selecting circuits provided with MOS transistors for groups of resistance elements; an ESD (Electro-Static Discharge) protection circuit including P-type protection elements connected between a node for a first power supply voltage VDD and the plurality of nodes, and N-type protection elements connected between a node for a second power supply node to which a second power supply voltage VSS and the plurality of nodes; and a dummy gray scale voltage selecting circuit including a plurality of dummy selecting circuits which includes dummy circuit MOS transistors which are connected between the gray scale voltage generating circuit and the gray scale voltage selecting circuit. The plurality of dummy selecting circuits are always turned on to function as resistances.
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