Patent ID: 8217883

Claim:
An output circuit for a data driver of a display device, comprising: a connection switch that includes a first terminal and a second terminal for receiving a first voltage and a second voltage, respectively, and first to third intermediate terminals, and that selects and supplies the first voltage or the second voltage to each of said first to third intermediate terminals, including selection of the same voltage for a plurality of the intermediate terminals, said connection switch switching assignment of the first voltage and the second voltage to said first to third intermediate terminals responsive to a connection switching signal; and an operation unit that receives the voltages supplied to said first to third intermediate terminals, and outputs to an output terminal of said output circuit a voltage obtained by performing a predetermined operation on the voltages supplied to said first to third intermediate terminals, wherein said connection switch performs switching between a first connection state and a second connection state by a periodic switching of the connection switching signal, using an integer multiple of a rewriting period of one screen of a display device or an integer multiple of a rewriting period of a data line, wherein: in the first connection state, said connection switch outputs the first voltage, the second voltage, and the second voltage to said first, second, and third intermediate terminals, respectively, and in the second connection state, said connection switch outputs the second voltage, the second voltage, and the first voltage to said first, second, third intermediate terminals, respectively, wherein said operation unit outputs to said output terminal a temporally averaged voltage of the output voltages of said operation unit in the first and second connection states by said switching between the first and second connection states.