Patent ID: 9338837
Filing Date: 2016-05-10
CPC Classification: B60Q,F21S,H05B

Claim Text:
1. A lighting device comprising: a substrate; a light emitting element provided on the substrate; and a resistive element provided on the substrate, and connected to the light emitting element in series, the resistive element controlling a current which flows in the light emitting element, wherein a voltage rate of the resistive element when a value of a first voltage which is reduced to half is applied to a first circuit to which the light emitting element and the resistive element are connected in series becomes equal to or smaller than 25% of a voltage rate of the resistive element when the first voltage is applied to the first circuit, and a second circuit in which the light emitting element and the resistive element are connected in series, wherein a voltage rate of the resistive element of the second circuit when a value of the first voltage which is reduced to half is applied to the second circuit is set to be higher than a voltage rate of the resistive element of the first circuit when the value of the first voltage which is reduced to half is applied to the first circuit.