INTERRUPTION CIRCUIT FOR EXTERNAL ELECTRODE FLUORESCENT LAMP DRIVING POWER SUPPLY, LIGHTING DEVICE COMPRISING SAME AND DISPLAY

摘要

An interruption circuit of an external electrode fluorescent lamp driving power supply comprising a detecting section for detecting the variation rate of a voltage supplied to an external electrode fluorescent lamp from the external electrode fluorescent lamp driving power supply for driving the external electrode fluorescent lamp such that the external electrode fluorescent lamp emits light with a luminance within a predetermined range, and an interruption signal-outputting section for outputting an interruption signal for stopping operation of the external electrode fluorescent lamp driving power supply when the detected value at the detecting section exceeds a predetermined level. With such an arrangement, the external electrode fluorescent lamp can be prevented from being in a runaway state.