Light source module

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.

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;
• a third light source arranged such that an output light of the third light source is irradiated to the low-beam region by the first optical system,
• wherein the lighting circuit is structured to supply the driving current to the third light source in response to a turn-on instruction for the low beam, and
• wherein the lighting circuit comprises:
• a first switch structured to turn on in response to a turn-on instruction for the low beam;
• a second switch structured to turn on in response to a turn-on instruction for the high beam;
• and
• a driving circuit structured to generate the driving current,
• wherein the first light source, the third light source, and the first switch are coupled in series,
• and wherein the second light source and the second switch are coupled in parallel with the third light source and the first switch.

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 for a low beam;
• a first switch arranged in parallel with the first light source;
• a second light source for a low beam and a second switch coupled in series with the first light source;
• a third light source for a high beam and a third switch arranged in series such that they form a path that is parallel to the second light source and the second switch;
• and
• a driving circuit structured to generate a driving current in response to any one from among the high beam turn-on instruction and the low beam turn-on instruction.