Vehicle lamp and vehicle having the vehicle lamp

Patent metadata

Field	Value
Publication number	US-10082267-B2
Application number	US-201715468486-A
Country	US
Kind code	B2
Filing date	Mar 24, 2017
Priority date	Mar 25, 2016
Publication date	Sep 25, 2018
Grant date	Sep 25, 2018

Abstract

A vehicle lamp includes a light source configured to draw a road surface, a projection lens configured to transmit light emitted from the light source, and a movable shade disposed in the vicinity of a rear focal point of the projection lens. The movable shade includes at least one plate-shaped shade which has a light-shielding surface along a direction orthogonal to an optical axis of the projection lens. The at least one plate-shaped shade is formed with at least one light-transmitting part having an enclosed shape.

First claim

The invention claimed is:

1. A vehicle lamp comprising:
a light source configured to draw a road surface;
a projection lens configured to transmit light emitted from the light source; and
a movable shade disposed in the vicinity of a rear focal point of the projection lens,
wherein the movable shade is rotatable and comprises at least one plate-shaped shade which has a light-shielding surface along a direction orthogonal to an optical axis of the projection lens, and
wherein the at least one plate-shaped shade is formed with at least one light-transmitting part having an enclosed rectangular shape that draws a rectangular light distribution pattern on the road surface.

2. The vehicle lamp according to claim 1 ,
wherein the at least one light-transmitting part is moved by rotating the movable shade.

3. The vehicle lamp according to claim 2 ,
wherein the movable shade is constituted by a disc-shaped shade,
wherein the disc-shaped shade has a rotational axis parallel to the optical axis and an opening portion which is formed so as to extend in an outer peripheral direction from a center of the disc-shaped shade and thus constitutes the at least one light-transmitting part, and
wherein the disc-shaped shade is rotated around the rotational axis.

4. The vehicle lamp according to claim 2 ,
wherein the rear focal point of the projection lens is disposed between the at least one light-transmitting part and a rotation shaft that rotates the movable shade.

5. A vehicle comprising the vehicle lamp according to claim 1 .

6. The vehicle lamp according to claim 1 ,
wherein the light source is disposed above the optical axis of the projection lens.

7. The vehicle lamp according to claim 1 ,
wherein the at least one plate-shaped shade further comprises an arrow-shaped opening portion that draws an arrow-shaped light distribution pattern on the road surface.

8. The vehicle lamp according to claim 1 ,
wherein the rectangular light distribution pattern is rotatable.

9. A vehicle lamp comprising:
a light source configured to draw a road surface;
a projection lens configured to transmit light emitted from the light source; and
a movable shade disposed in the vicinity of a rear focal point of the projection lens,
wherein the movable shade comprises at least one cylinder or partial cylinder-shaped shade which has a curved light-shielding surface that curves around a center axis that is orthogonal to an optical axis of the projection lens, and
wherein the at least one cylinder or partial cylinder-shaped shade is formed with at least one light-transmitting part having an enclosed rectangular shape that draws a rectangular light distribution pattern on the road; wherein the at least one plate-shaped shade further comprises an arrow-shaped opening portion that draws an arrow-shaped light distribution pattern on the road surface.

10. The vehicle lamp according to claim 9 ,
wherein the movable shade is rotated about a rotational axis along a horizontal direction or a vertical direction, and
wherein the rotational axis is outside of the movable shade.

11. The vehicle lamp according to claim 10 ,
wherein the light-transmitting part is constituted by a plurality of linear opening portions which extends long in a direction perpendicular to a rotation direction or in a direction inclined with respect to the rotation direction.

12. The vehicle lamp according to claim 9 ,
wherein the vehicle lamp further includes a fixed shade disposed between the light source and the movable shade, and
wherein the fixed shade is provided at a position where the fixed shade is capable of shielding light emitted toward at least a part of the movable shade in a rotation direction.

13. The vehicle lamp according to claim 12 ,
wherein the movable shade is rotated about a rotational axis along the horizontal direction or the vertical direction, so that the movable shade is movable to a position where the movable shade does not shield light which travels from the light source toward the projection lens through the fixed shade.

14. The vehicle lamp according to claim 9 ,
wherein the at least one shade is rotatable about a rotation axis in an arc.

15. A vehicle lamp comprising:
a light source configured to draw a road surface;
a projection lens configured to transmit light emitted from the light source; and
a movable shade disposed in the vicinity of a rear focal point of the projection lens,
wherein the movable shade comprises at least one plate-shaped shade which has a light-shielding surface along a direction orthogonal to an optical axis of the projection lens,
wherein the at least one plate-shaped shade is formed with at least one light-transmitting part having an enclosed shape, and
wherein the at least one plate-shaped shade is movable in a vertical direction and a lateral direction perpendicular to both the optical axis of the projection and the vertical direction.

16. The vehicle lamp according to claim 15 ,
wherein the at least one shade comprises a first shade movable in the vertical direction, and a second shade movable in the lateral direction.

17. The vehicle lamp according to claim 15 ,
wherein the at least one shade comprises a single shade that is movable in both the vertical direction and the lateral direction.

18. The vehicle lamp according to claim 15 ,
wherein the at least one plate-shaped shade further comprises an arrow-shaped opening portion that draws an arrow-shaped light distribution pattern on the road surface.

Assignees

• Koito Mfg Co Ltd

Inventors

• Tanaka Hidetada
• Masuda Takeshi
• Shibata Yuichi
• Mochizuki Mitsuyuki
• Tokida Tsukasa
• Tani Kentaro

Classifications

• H05B45/00

  Circuit arrangements for operating light-emitting diodes [LED] · CPC title

• F21S41/663

  by switching light sources (by switching incandescent light sources F21S41/162) · CPC title

• F21V19/001

  the light sources being semiconductors devices, e.g. LEDs · CPC title

• F21S41/695

  Screens rotating around a vertical axis (rotating flaps F21S41/689) · CPC title

• F21S41/143

  the main emission direction of the LED being parallel to the optical axis of the illuminating device · CPC title