Vehicle headlamp
A vehicle headlamp that is mounted on a vehicle and forms a light distribution pattern including a low-beam light distribution pattern includes first irradiator that irradiates a first light distribution pattern that is a portion of the low-beam light distribution pattern, and a second irradiator that irradiates a second light distribution pattern that is a portion of the low-beam light distribution pattern, at least a portion of the second light distribution pattern being located above the first light distribution pattern. A first G-value at an upper end of the first light distribution pattern is 0.25 or more and 0.35 or less, and a second G-value at an upper end of the second light distribution pattern is 0.25 or more and 0.35 or less.
1 . A vehicle headlamp mounted on a vehicle and configured to form a light distribution pattern including a low-beam light distribution pattern, the headlamp including:
a first irradiator configured to irradiate a first light distribution pattern that is a first portion of the low-beam light distribution pattern; and
a second irradiator configured to irradiate a second light distribution pattern that is a second portion of the low-beam light distribution pattern and is different from the first portion, at least a portion of the second light distribution pattern being located above the first light distribution pattern,
wherein a first G-value, defined as a luminance gradient expressed in cd/m 2 per degree, at an upper end of the first light distribution pattern is 0.25 or more and 0.35 or less,
a second G-value, defined as a luminance gradient expressed in cd/m 2 per degree, at an upper end of the second light distribution pattern is 0.25 or more and 0.35 or less, and
a cutoff line of the second light distribution pattern overlaps with a cutoff line of the first light distribution pattern or is located above the cutoff line of the first light distribution pattern, and is located below an H-H line.
2 . The vehicle headlamp according to claim 1 , wherein the at least a portion of the second light distribution pattern overlaps with a central portion of the first light distribution pattern in a left-right direction.
3 . The vehicle headlamp according to claim 1 , wherein the second light distribution pattern overlaps with a cutoff line of the first light distribution pattern.
4 . The vehicle headlamp according to claim 1 , wherein the second light distribution pattern includes a first portion on a vehicle own lane side from a V-V line and a second portion on an opposing lane side from the V-V line.
5 . The vehicle headlamp according to claim 4 , wherein a portion of an upper end of the second portion near the V-V line is positioned lower than a remaining portion.
6 . The vehicle headlamp according to claim 1 , wherein the second G-value is equal to or less than the first G-value.
7 . The vehicle headlamp according to claim 1 , further comprising:
a third irradiator configured to irradiate an area including at least an area above a cutoff line of the low-beam light distribution pattern with light and configured to dim any area within the irradiated area,
wherein during high beam activation, both the first irradiator and the third irradiator are turned ON, or the second irradiator is dimmed while both the first irradiator and the third irradiator are turned ON, and
wherein during low beam activation, both the first irradiator and the second irradiator are turned ON.
8 . The vehicle headlamp according to claim 1 , wherein an upper end of the first light distribution pattern includes a plurality of upper portions having different vertical positions,
wherein the first light distribution pattern includes, in a left-right direction, a central region located near a V-V line, a left region located on a left side of the central region, and a right region located on a right side of the central region,
wherein upper portions of the left region and the right region extend linearly in a horizontal direction and are located at the same vertical position, and
wherein the central region includes at least two upper portions having different vertical positions, both of which are located below an H-H line.
9 . The vehicle headlamp according to claim 4 , wherein an upper end of the second light distribution pattern has a downwardly concave shape in a region near a V-V line.
10 . The vehicle headlamp according to claim 4 , wherein the second portion includes a first upper part located near the V-V line and a second upper part located farther from the V-V line in a left-right direction, and
wherein the first upper part is positioned lower than the second upper part.
11 . The vehicle headlamp according to claim 4 , wherein an upper end of the first portion of the second light distribution pattern on the vehicle own lane side is located at a same vertical position as an upper end of the second portion of the second light distribution pattern located farther from the V-V line.
12 . The vehicle headlamp according to claim 1 , wherein the first light distribution pattern and the second light distribution pattern overlap with each other to form an overlapping region in which light from both the first irradiator and the second irradiator is superposed.