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

Claim 0:
1. 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 driving circuit is structured to supply the driving circuit having a first amount to the series connection circuit in an on state of the bypass switch and to supply the driving circuit having a second amount which is smaller than the first amount to the series connection circuit in an off state of the bypass switch.