The voltages as transmitted through a wiring groups 25 and 26 are, for example, a ground voltage of e.g. 0 V, a high voltage of e.g. 5 V for a logical operation, a high lighting voltage of e.g. 0 V for a liquid crystal drive, a high non-lighting voltage to e.g. -4 V for a liquid crystal drive, a low non-lighting voltage of e.g. -26 V for a liquid crystal drive, and a low lighting voltage of e.g. -