Koito Manufacturing Company, Ltd.

Hidetada Tanaka

Takeshi Masuda

Satoshi Yamamura

Yuichi Shibata

Michihiko Hayakawa

Misako Nakazawa

Takayuki Yagi

Motohiro Komatsu

Kazutoshi Sakurai

Takao Muramatsu

Takashi Inoue

Hiroyuki Ishida

Naoki Uchida

Toshiaki Tsuda

Tsukasa Tokida

Takanori Namba

Mitsuyuki Mochizuki

Noriko Sato

Kentarou Murakami

Akihiro Matsumoto

Tetsuya Suzuki

Naoki Sone

Takuya Kotajima

Kentaro Tani

Masayasu Ito

Michio Tsukamoto

Satoshi Kikuchi

Hiroshi Kawashima

Yuji Yasuda

Yuta Maruyama

Misako Kamiya

Ryuho Sato

Hiroki Kawai

Yoshiyuki Nakanishi

Teppei Muramatsu

Hiroaki Hara

Noriko Okada

Hidemichi Sone

Yoshiaki Aiso

Takayoshi Ishizuka

Ken Kato

Takatomo Fujiyoshi

Naoki Sugiura

Syouhei Yanagidu

Takeshi Toda

Kenta Oishi

Yukiko Kitazawa

A vehicle headlight () includes a light source unit () including a plurality of light emitting elements (), a reflector () that scans light from the plurality of light emitting elements () to form a light distribution pattern (), and a control unit (). The control unit () controls the light source unit () such that the light amount of light emitted from some light emitting elements to a predetermined region (AR) overlapping a target object does not change and the light amount of light emitted from other some light emitting elements to the predetermined region (AR) overlapping the target object changes among the light emitting elements that emit light to the predetermined region (AR) overlapping the target object in the superimposition region (PA).

Vehicle headlight

An optical unit includes a first light source, a second light source, a rotary reflector that rotates about an axis of rotation while reflecting first light emitted from the first light source, and a projection lens that projects the first light reflected by the rotary reflector into a light illuminating direction of the optical unit to form a first light distribution pattern. The second light source is disposed such that second light emitted from the second light source enters the projection lens without being reflected by the rotary reflector. The projection lens is configured to project the second light into the light illuminating direction of the optical unit to form a second light distribution pattern such that the second light distribution pattern overlaps an end portion of the first light distribution pattern in a right-left direction.

Optical unit

A rotating reflector is a resin rotating reflector including: a rotating part; and a blade provided around the rotating part and functioning as a reflecting surface, wherein the rotating part has a hole in which a rotary shaft is inserted.

Rotating reflector, optical unit, support component, vehicle headlamp system, method of manufacturing rotating reflector

An optical unit includes: a light source; a rotating reflector configured to be rotated in a single direction with the rotational axis as the center of rotation while reflecting light emitted from the light source; and a projector lens configured to project light reflected by the rotating reflector in the light irradiation direction. The projector lens has a first lens region LRthat defines the first focal plane and a second lens region that defines the second focal plane that differs from the first focal plane. The light source is arranged such that, when the rotating reflector is set to the first rotational position, its virtual position is in the vicinity of the focal plane, and such that, when the rotating reflector is set to the second rotational position, its virtual position is in the vicinity of the focal plane.

Optical unit and method for determining reflection plane

A vehicle lamp includes a light source unit for road surface drawing capable of forming a light source image longer in an upper and lower direction than a left and right direction of the lamp and a projection lens through which light forming the light source image is transmitted and which projects a predetermined light distribution pattern on a road surface. A light emitting surface or a light transmitting surface of the light source unit is disposed in a vicinity of a rear focal point of the projection lens. The light emitting surface or the light transmitting surface is inclined with respect to an upper and lower direction orthogonal to an optical axis of the projection lens.

Vehicle lamp, vehicle lamp control system, and vehicle provided with vehicle lamp and vehicle lamp control system

In this invention, letters that can be seen by a pedestrian () are drawn on an intersection (). A mark (MM) that can be seen by the driver of the host vehicle (C) is drawn on the road () between the intersection () and the host-vehicle (C). The shapes of the letters (MO) are corrected in accordance with the positional relationship between the pedestrian () and the intersection (). The shape of the mark (MM) is corrected in accordance with the positional relationship between the driver of the host-vehicle (C) and the road ().

Road surface image-drawing system for vehicle

An optical unit includes a light source and a rotary reflector configured to reflect a light emitted from the light source and rotate around a rotation axis in one direction. The rotary reflector is provided with a reflective surface such that a desired light distribution pattern is formed by scanning a light of a light source reflected by the rotary reflector while the rotary reflector is rotated. The light source includes a first light-emitting portion configured to be turned on when forming a first light distribution pattern that mainly illuminates a range lower than a horizontal line, and a second light-emitting portion configured to be turned on when forming a second light distribution pattern that illuminates a range at least higher than the horizontal line.

Vehicle lamp including rotary reflector

A blade receives light emitted from a light source and repeats a predetermined periodic motion to scan the front of a vehicle with reflected light of the emitted light. A position detector generates a position detection signal Sindicating a timing at which a predetermined reference point of the blade passes a predetermined position. Based on the position detection signal S, a period calculator calculates a period Tp of the periodic motion of the blade. A light intensity calculator receives light-distribution-pattern information Sto be formed in front of the vehicle and calculates light intensity to be generated by the light source at each time based on the position detection signal Sand the period Tp. A driver turns on a semiconductor light source so as to obtain the light intensity calculated by the light intensity calculator at each time.

Lighting circuit and vehicular lighting device

The control part controls a timing of changing the light emission intensity of the first light source and a timing of changing the light emission intensity of the second light source such that a first light-shielding portion is formed in a part of the first irradiation pattern, a second light-shielding portion is formed in a part of the second irradiation pattern so as to overlap with the first light-shielding portion, and a range of the first light-shielding portion and a range of the second light-shielding portion are deviated from each other.

When forming a first light distribution pattern, the controller is configured to control the magnitudes of the drive currents of first light emitting element and the second light emitting element. When forming a second light distribution pattern, the controller is configured to control so that the magnitude of the drive current of the second light emitting element is smaller than when forming the first light distribution pattern and/or so that a time period in which the drive current is to be supplied to the second light emitting element is shorter than when forming the first light distribution pattern.

A lamp unit includes a light-emitting element array composed by a plurality of light-emitting elements, having respective individual irradiation regions constituting a high-beam light-distribution pattern and configured to be capable of being turned on individually, mounted in array on a substrate, a projection lens disposed in front of the light-emitting element array, and a reflector disposed below the light-emitting element array. Inter-light-emitting-element spacing within the light-emitting element array widens the more separated the elements are from the projection lens' optical axis.

Lamp unit and vehicle headlamp

An optical unit includes a light source, a rotary reflector that rotates about an axis of rotation and includes a reflective surface that reflects light emitted by the light source, and a projection lens including an incident surface on which reflected light from the rotary reflector is incident. A shade is provided between the projection lens and the rotary reflector. The shade blocks at least a portion of light that has been incident on an emission surface of the projection lens at an angle within a predetermined range, that has been condensed by the projection lens, and that travels toward the reflective surface of the rotary reflector.

Optical unit and vehicle lamp

An optical unit includes a first light source, a second light source, a rotary reflector rotating around its rotation axis while reflecting a first light emitted from the first light source, and a projection lens configured to project the first light reflected by the rotary reflector in a light irradiation direction of the optical unit. The second light source is disposed such that a second light emitted from the second light source is incident on the projection lens without being reflected by the rotary reflector. The projection lens is configured to project the second light in the light irradiation direction of the optical unit.

Growing community of inventors

Shizuoka, Japan

Hidetada Tanaka