Patent ID: 8072572

Claim:
A substrate for a display panel comprising: a terminal from which a signal for inspection is inputted; a line drawn from a bus line in a display region; an insulating film; and a line for inspection which includes a section overlapping with and/or intersecting the line drawn from the bus line between which the insulating film is sandwiched, and is arranged to electrically connect the terminal from which the signal for inspection is inputted with the line drawn from the bus line, wherein a relation between an area of the line drawn from the bus line and an area of the inspection line satisfies a formula, V>|Q X S X /C X âˆ’Q Y S Y /C Y |, where V is a withstand voltage of the insulating film; Q X is an amount of electrostatic charge per unit area of the line drawn from the bus line; S X is the area of the line drawn from the bus line; C X is a capacity of the line drawn from the bus line; Q Y is an amount of electrostatic charge per unit area of the inspection line; S Y is the area of the inspection line; and C Y is a capacity of the inspection line.