Patent ID: 7196681

Claim:
A light emitting element driving circuit for controlling, based on a voltage value of a data line, an ON/OFF state of a light emitting element specified by a selection signal from an address line, comprising: a first switching element controlled in accordance with said selection signal; a first capacitor for holding an electrical charge corresponding to the voltage value of said data line supplied via said first switching element; and a pulse supply circuit for providing said light emitting element with pulses in synchronization with a clock signal as long as said first capacitor holds said voltage value, wherein said pulse supply circuit includes: first and second driving power sources; second and third switching elements serially connected between one terminal of said light emitting element and said first driving power source; a second capacitor having one terminal connected to said one terminal of the light emitting element; and a fourth switching element having one common terminal and two independent terminals for alternately connecting said common terminal to said two independent terminals, wherein said common terminal is connected to the other terminal of the second capacitor, and one of said two independent terminals is connected to said second driving power source, while the other terminal of said two independent terminals is connected to a reference potential, said second switching element being controlled by said voltage value held in said first capacitor, and said third and fourth switching elements controlled in synchronization with each other based on the clock signal.