LIGHT OUTPUT CONTROL DEVICE, ILLUMINATION SYSTEM, AND FACILITY APPARATUS

摘要

A light output control device includes a switching device, multiple signal input ports, a signal selection circuit, and a control circuit. The switching device is to be electrically connected between a direct-current power supply and a light source circuit. The light source circuit includes a semiconductor light emitting element. The multiple signal input ports respectively correspond to multiple kinds of light output control signals. The signal selection circuit selects, when receiving two or more light output control signals indicating different light output levels through the multiple signal input ports, a light output control signal indicating a lowest (or highest) light output level, from the two or more light output control signals. The control circuit performs switching control of the switching device with a duty cycle corresponding to the lowest (or highest) light output level indicated by the light output control signal selected by the signal selecting circuit.

主权项

1. A light output control device, comprising:
a switching device to be electrically connected between a direct-current power supply and a light source circuit including a semiconductor light emitting element; multiple signal input ports respectively corresponding to multiple kinds of light output control signals; a signal selection circuit configured to, when receiving two or more light output control signals indicating different light output levels through the multiple signal input ports, select a light output control signal indicating a lowest light output level, from the two or more light output control signals; and a control circuit configured to perform switching control of the switching device with a duty cycle corresponding to the lowest light output level indicated by the light output control signal selected by the signal selecting circuit.