Current output type digital-analog conversion circuit, and graphic display device

A current output type digital-analog conversion circuit comprising a decoder and a plurality of binary current generators, wherein:

• the decoder outputs a plurality of decode signals obtained by decoding higher-order bits of input digital data;
• each of the binary current generators comprises:
• a carry current source for outputting a carry current;
• k binary current sources for respectively outputting k currents which increase from the carry current up to a current corresponding to 2(k−1) times of the carry current by a rate of a power of 2;
• bit switch means for turning ON/OFF the output currents from the k binary current sources;
• all-ON switch means for turning ON/OFF the output current from the carry current source;
• and
• output enable switch means for turning ON/OFF the current obtained by adding up the output current from the carry current source and the output currents from the k binary current sources;
• and
• the current output type digital-analog conversion circuit further comprises means for adding up and outputting the binary currents and the all-ON currents output by the plurality of binary current generators.