El display, el display driving circuit and image display

A driving circuit of EL display apparatus, comprising:

• a plurality of unit current sources;
• a reference current generation circuit for defining a current to be output from the unit current sources;
• a plurality of current switching circuits disposed on output ends of the unit current sources,
• a current wiring having one end connected to the current switching circuits via a first change over switch and the other end connected to source signal lines;
• and
• a precharge voltage source which outputs a predetermined voltage and is connected to the current wiring via a second change over switch, wherein
• the current switching circuits are turned on and off depending on 30 gray scale data of an image signal, and
• the first and the second change over switches selectively connect either the current switching circuits or the precharge voltage source to the source signal line.