Patent ID: 7209843

Claim:
A circuit inspection method, comprising: supplying electric charges to a first, second, and third electric charge holding electrodes, the first electric charge holding electrode being electrically connected to an output line when a predetermined drive voltage is supplied to a first scan line, the second electric charge holding electrode being electrically connected to the output line when a predetermined drive voltage is supplied to both the first scan line and a second scan line, the third electric charge holding electrode being electrically connected to the output line when a predetermined drive voltage is supplied to the second scan line; outputting the electric charges held in the first electric charge holding electrode after a predetermined period of time from supplying of the electric charges; changing voltages of the first and second scan lines to a drive voltage to output the electric charges held in the second electric charge holding electrode; and determining whether an electric charge writing function and an electric charge holding function of the second electric charge holding electrode are good or not based on (i) one of a quantity of the electric charges supplied to the second electric charge holding electrode and a quantity corresponding to the electric charges supplied to the second electric charge holding electrode, and (ii) a quantity of the electric charges output from the second electric charge holding electrode.