PURPOSE: To complement the electrical resistance difference between liquid crystal driving power source lines and to obtain a uniform display by providing the liquid crystal driving power source lines of the small resistance of display electrode patterns with regulating resistors.

CONSTITUTION: A rectangular display screen 18 of a liquid crystal display panel 14 is composed by sticking a glass substrate 15 for scanning and a glass substrate 16 for signals to each other. The signal side liquid crystal driving power source lines 19, 20 are formed in the regions exclusive of the display screen 18 of the glass substrate 16 for signals. Wiring patterns 26 are formed on a printed circuit board 23. A resistor chip 27 which is the regulating resistor is disposed on wiring patterns 26 between a part, i.e., IC chip 24, of the wiring patterns 26 and a connector 25. The wiring resistance difference generated in the display electrode patterns is corrected by the resistance chip 27 according to the liquid crystal display panel 14 provided with such printed circuit board 23. As a result, the contrast differences are no longer generated between the individual liquid crystal display panels 14.