| 摘要 |
PROBLEM TO BE SOLVED: To provide a gradation potential generation circuit which prevents an output impedance from being made higher and can output stable gradation potential, to provide a data driver of display device comprising the gradation potential generation circuit, and to provide a display device having the data driver of display device. SOLUTION: The gradation potential generation circuit 14 comprises: a first ladder resistance circuit 32 which generates j pieces of gradation potentials (therein, j is an integer of two or more) produced by dividing first and second reference voltages supplied to both ends of the first ladder resistance circuit and outputs the generated j pieces of gradation potentials to j pieces of first nodes; a second ladder resistance circuit 33 which generates thinned-out k pieces of gradation potentials (therein, j>k) among the j pieces of gradation potentials generated by the first ladder resistance circuit 32; and k pieces of switches which supply the k pieces of gradation potentials generated by the second ladder resistance circuit 33 to k pieces of first nodes among j pieces of first nodes on the basis of a first control signal. COPYRIGHT: (C)2008,JPO&INPIT
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