Patent ID: 11872932
Assignee: KOITO MANUFACTURING CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  F  H | IPC B  H

Claim 0:
1. A lighting circuit for an automotive lamp, wherein the automotive lamp comprises a first semiconductor light source and a second semiconductor light source having different colors and is structured to mix the two colors so as to generate mixed-color light, the lighting circuit comprising:
a first driving circuit structured to supply a first driving current stabilized to a first target amount to the first semiconductor light source;
a second driving circuit structured to supply a second driving current stabilized to a second target amount to the second semiconductor light source;
a first abnormal state detection circuit structured to stop an operation of the second driving circuit in responsive to detecting an abnormal non-lighting state in the first semiconductor light source; and
a second abnormal state detection circuit structured to stop an operation of the first driving circuit in responsive to detecting an abnormal non-lighting state in the second semiconductor light source.