Lamp unit for forming a cut-off line and vehicular headlamp using the same
AssigneeKoito Manufacturing Co., Ltd.
InventorHiroyuki Ishida
Life of this patent
Estimating the term…
Abstract
A lamp unit for a vehicular headlamp includes a projection lens disposed on an optical axis extending in a vehicle longitudinal direction and a semiconductor light-emitting element having a light-emitting chip with a lower end edge formed linearly. The semiconductor light-emitting element is disposed in the rear of the projection lens facing forward so as to position the lower end edge 24a1 on the optical axis. The projection lens projects light from a point on the optical axis of the lower end edge within a vertical cross section as parallel light, and projects light from a point on the optical axis of the lower end edge within a horizontal cross section as diffused light.
Claims15
A lamp unit for a vehicular headlamp comprising:
- a projection lens;
- and
- a light-emitting element having a light-emitting chip with a lower end edge,
- wherein the lower end edge is disposed on an optical axis of the projection lens in a rear of the projection lens, and
- wherein the projection lens is configured to project light from a point on the optical axis at the lower end edge as parallel light within a plane perpendicular to the lower end edge chip, while projecting light from a point on the optical axis of the lower end edge as diffusion light within a plane parallel to the lower end edge.
A vehicular headlamp comprising a plurality of lamp units, wherein each of the plurality of lamp units comprises:
- a projection lens;
- and
- a light-emitting element having a light-emitting chip with a lower end edge,
- wherein the lower end edge is disposed on an optical axis of the projection lens in a rear of the first projection lens, and
- wherein the projection lens is configured to project light from a point on the optical axis at the lower end edge as parallel light within a plane perpendicular to the lower end edge chip, while projecting light from a point on the optical axis of the lower end edge as diffusion light within a plane parallel to the lower end edge.
A vehicular headlamp comprising:
- a first lamp unit;
- and
- a second lamp unit,
- wherein the first lamp unit comprises:
- a first projection lens;
- and
- a first light-emitting element having a light-emitting chip with a lower end edge that extends in a horizontal direction,
- wherein the lower end edge is disposed on an optical axis of the first projection lens in a rear of the first projection lens, and
- wherein the first projection lens is configured to project light from a point on the optical axis at the lower end edge as parallel light within a plane perpendicular to the lower end edge chip, while projecting light from a point on the optical axis of the lower end edge as diffusion light within a plane parallel to the lower end edge, and
- wherein the second lamp unit comprises:
- a second projection lens;
- and
- a second light-emitting element having a light-emitting chip with a lower end edge that extends in a direction inclined at a predetermined angle with respect to the horizontal direction,
- wherein the lower end edge is disposed on an optical axis of the second projection lens in a rear of the second projection lens, and
- wherein the second projection lens is configured to project light from a point on the optical axis at the lower end edge.
Dependencies are inferred from the claim text.