LIGHT EMITTING DIODE DRIVING CIRCUIT

摘要

A light emitting diode driving circuit is provided with a reference current section for generating a reference current; and a current outputting section for a plurality of channels, which generates a driving current for a plurality of systems in proportion to the reference current by on/off controlling a switch for the systems, and supplies a light emitting diode of the driving current. The light emitting diode driving circuit is characterized in that a power supply for the reference current section and a power supply for the current outputting section for each channel are separated from each other.