A light control circuit that makes it possible to, when the light intensity of the area surrounding a display screen varies in a relatively short time, prevent the brightness of a backlight from being erroneously adjusted as the result of the variation being detected is provided. The light control circuit controls the backlight of a display panel. This light control circuit is provided with functions of performing the following operation: detection signals from multiple optical sensors are taken into a common sampling means in a time division manner to acquire multiple sampling values temporally dispersed; a surrounding light intensity is determined by majority decision based on the multiple sampling values, and the result of determination is externally outputted.