Display driving circuit and display driving system

A display driving circuit connected to a plurality of groups of display channel units in which a plurality of display devices which can display indifferent colors from each other are combined into a group and which enable a plurality of types of color representations by time-sequentially changing each of driving conditions of the display devices for each group distinguished by a channel unit number, the display driving circuit comprising:

• a plurality of groups of channel driving units, each of which is provided for each display channel unit, and each of which can drive the plurality of the display devices of the display channel unit independently from each other;
• a cycle switching unit which switches, for each display channel unit, a lighting cycle sequentially to a next lighting cycle every time a lighting period of the lighting cycle elapses while setting different timings for switching the lighting cycles with predetermined delay periods;
• and
• a pallet data setting unit which uses a plurality of types of pallet data correlating a channel driving condition, which is a driving condition of each display device of the display channel unit, and each type of color representation, manages a time-sequential color representation instruction which is instructed in advance in a separated manner to the pallet data correlated to the color representation and information representing a movement of the color representation on a time axis, obtains pallet data corresponding to each display channel unit for each lighting cycle according to the time-sequential color representation instruction which is instructed in advance, assigns the obtained pallet data while sequentially switching the pallet data according to delayed switching of the lighting cycle, and sets the driving condition of each display device of the display channel unit.