Headlamp for vehicle
First Claim
Patent Images
1. A headlamp for a vehicle which is constituted to form a light distribution pattern for a low beam, comprising:
- a plurality of lighting units using semiconductor light emitting elements as light sources, wherein a cutoff line forming unit for carrying out a light irradiation to form a cutoff line of the light distribution pattern for a low beam, a hot zone forming unit for carrying out a light irradiation to form a hot zone of the light distribution pattern for a low beam and a diffusion region forming unit for carrying out a light irradiation to form a diffusion region of the light distribution pattern for a low beam are used as the lighting units;
wherein the cutoff line forming unit, the hot zone forming unit and the diffusion region forming unit are provided in three stages;
said three stages being an upper stage, lower stage, and middle stage; and
said cutoff line forming unit is positioned in the middle stage.
1 Assignment
0 Petitions
Accused Products
Abstract
A headlamp having a plurality of lighting units using light emitting diodes as light sources. A cutoff line forming unit, hot zone forming units, and a diffusion region forming unit are used as these lighting units. Consequently, a light distribution pattern for a low beam having a desirable pattern shape and light intensity distribution can be obtained as the synthetic light distribution pattern of light distribution patterns formed by the irradiation of a light from these three kinds of lighting units.
-
Citations
7 Claims
-
1. A headlamp for a vehicle which is constituted to form a light distribution pattern for a low beam, comprising:
-
a plurality of lighting units using semiconductor light emitting elements as light sources, wherein a cutoff line forming unit for carrying out a light irradiation to form a cutoff line of the light distribution pattern for a low beam, a hot zone forming unit for carrying out a light irradiation to form a hot zone of the light distribution pattern for a low beam and a diffusion region forming unit for carrying out a light irradiation to form a diffusion region of the light distribution pattern for a low beam are used as the lighting units;
wherein the cutoff line forming unit, the hot zone forming unit and the diffusion region forming unit are provided in three stages;
said three stages being an upper stage, lower stage, and middle stage; and
said cutoff line forming unit is positioned in the middle stage. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A headlamp, comprising:
-
a plurality of lighting units operable to form a light distribution pattern, the plurality of lighting units comprising;
a cutoff line forming unit operable to carry out a light irradiation to form a cutoff line of the light distribution pattern;
a hot zone forming unit operable to carry out a light irradiation to form a hot zone of the light distribution pattern; and
a diffusion region forming unit operable to carry out a light irradiation to form a diffusion region of the light distribution pattern;
wherein the cutoff line forming unit, the hot zone forming unit and the diffusion region forming unit are provided in three stages;
said three stages being an upper stage, lower stage, and middle stage; and
said cutoff line forming unit is positioned in the middle stage. - View Dependent Claims (7)
-
Specification