LIGHT EMITTING DEVICE, LIGHTING DEVICE, LIGHTING SYSTEM, LIGHT EMITTING DIODE CIRCUIT, MOUNTING SUBSTRATE, AND LIGHT EMITTING METHOD FOR LIGHT EMITTING DIODE

摘要

A lighting system includes: plural light emitting chips (52) each having a blue LED; a substrate (51) on which the plural blue LEDs are connected in a series with polarities thereof aligned, thereby to form a light emitting diode array; a shade (12) to which the substrate (51) is attached, the shade (12) being electrically grounded; an AC-DC conversion device for converting alternating current supplied from an AC power supply through first and second feed lines into direct current and supplying the direct current to the light emitting diode array; a conductive sheet disposed between the substrate (51) and the shade (12), the sheet being electrically insulated from the substrate (51) and the shade (12) and being electrically connected to the first feed line; and a switch for electrically connecting and disconnecting the second feed line.