Koito Manufacturing Company, Ltd.

Tomoyuki Moritani

Akinori Matsumoto

Masahito Naganawa

Takayuki Iwaki

Takahiro Suzuki

Naohi Nino

Kiyotaka Fukawa

Masao Kinoshita

Sumito Ohtaki

Kohji Shimakura

Noriyuki Konagai

A vehicle head lamp includes: a light source; a reflector that reflects light emitted from the light source; a condenser lens that irradiates the light reflected by the reflector forward; and a shade that blocks part of the light reflected by the reflector to obtain a desired light distribution. The shade includes a main shade that has an opening for passing overhead sign light irradiated forward and upward and a sub-shade that is provided so as to be inclined rearward and downward from an upper edge of the main shade in order to obtain a cut line of the light distribution, and the reflector has an OHS reflection area used to project part of the reflected light toward a lower surface of the sub-shade and that allows the light reflected on the lower surface to pass through the opening of the main shade as the OHS light.

Vehicle head lamp

A projection-type vehicle headlamp includes a lamp body, a front cover forming a lamp housing together with the lamp body, a light projection unit accommodated inside the lamp body, and a cover extending in a forward direction from the light projection unit. A louver is formed on a portion of the cover where light from the light projection unit is irradiated so as to allow irradiated light to pass through the louver.

Projection-type vehicle headlamp having a louvered cover

A vehicle headlamp includes a projection lens which is placed on an optical axis extending in a front and rear direction of a vehicle, a light source which is placed behind a rear focal point of the projection lens, a reflector which reflects light emanated directly from the light source in a forward direction and toward the optical axis, and a light-dark boundary forming plate which is placed between the projection lens and the light source. The light-dark boundary forming plate extends rearward and obliquely downward from a vicinity of the rear focal point of the projection lens, and a light-dark boundary forming portion is formed on a front end portion of the light-dark boundary forming plate. The light-dark boundary forming portion shields a part of the light reflected from the reflector and forms a cut-off line of a light distribution pattern.

Vehicle headlamp

A first shadeis properly moved to vertically shift the position of a cutoff line, and furthermore, a lighting unitis properly tilted in a vertical direction to displace a whole light distribution pattern in the vertical direction. Consequently, a light irradiation is carried out with a light distribution pattern at an irradiation angle corresponding to a vehicle traveling situation. In that case, a second shadeis properly moved to form a dark portion in a central part on the lower end of the light distribution pattern in a predetermined size if necessary. Consequently, the amount of a light irradiation on a short-distance region can be controlled finely, and a road surface on this side can be prevented from becoming too bright in a high-speed travel and a light reflected by the road surface which causes a glare can be prevented from being generated in a rain travel.

Headlamp for vehicle

In a headlamp having a single filament bulb or discharge bulb, there is provided a movable shade that can appear from a reflection mirror located above the single filament bulb. In a usual condition, the movable shade is pulled at the back of the reflection mirror located above the single filament bulb. Then, a light emitted from the single filament bulb is condensed by the reflection mirror and irradiates a very long distance thereby to make a high-speed traveling possible. On the contrary, when it is rainy or foggy, the movable shade is protruded in the front of the reflection mirror. Then, a part of a light emitted from the single filament bulb is shielded by the movable shade, and the road surface in 20-40 m front of the vehicle is darkened thereby to reduce surface reflection from the road surface.

Growing community of inventors

Shizuoka, Japan

Tomoyuki Moritani