Patent ID: 11906123
Assignee: KOITO MANUFACTURING CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC F  B  H | IPC F

Claim 4:
5. A light source module for a vehicle structured to be switchable between a high beam and a low beam, the light source module comprising:
a first light source arranged such that an output light of the first light source is irradiated to a low-beam region by a first optical system;
a second light source arranged such that an output light of the second light source is irradiated to a high-beam region by a second optical system; and
a lighting circuit structured to supply a driving current to the first light source in response to any one from among a turn-on instruction for the high beam and a turn-on instruction for the low beam, and to supply the driving current to the second light source in response to the turn-on instruction for the high beam,
wherein the first light source and the second light source are coupled in series, and wherein the lighting circuit comprises:
a driving circuit structured to supply the driving current to a series connection circuit of the first light source and the second light source; and
a bypass switch arranged in parallel with the second light source, and structured to be turned off during a period in which the turn-on instruction for the high beam occurs, and to be turned on during a period in which the turn-on instruction for the low beam occurs,
wherein the first light source comprises a first semiconductor light-emitting element and a second semiconductor light-emitting element;
wherein the second light source comprises a third semiconductor light-emitting element; and

wherein the first optical system comprises:
a first lens structured to receive an output light of the first semiconductor light-emitting element so as to form a light distribution for a region below an elbow point of the low-beam region; and
a second lens structured to receive an output light of the second semiconductor light-emitting element so as to form a light distribution for a region above an elbow point of the low-beam region,
and wherein the second optical system comprises a third lens structured to receive an output light of the third semiconductor light-emitting element so as to illuminate the high-beam region.