Control device and control method, and planar light source and control method of planar light source

摘要

A control device for controlling driving of an LED (11) includes: a driving section driving the LED (11), the driving section being formed including a switching element (12); a control value obtaining section (61) obtaining a control value of n + m bits; and a controlling section (21, 31, 34, 37, 36, 62-64) controlling the driving of the LED (11) by the driving section on a basis of the control value of the n + m bits obtained by the control value obtaining section (61) such that a number of times of turning on the switching element (12) in a predetermined period is controlled by a control value of n higher-order bits, an ON time at one of the times of turning on the switching element (12) is controlled by a control value of m lower-order bits, and ON times of the switching element (12) excluding the ON time at the one time of turning on the switching element (12) are a predetermined time.