Lamp for vehicles

Patent metadata

Field	Value
Publication number	US-12276385-B2
Application number	US-202418608074-A
Country	US
Kind code	B2
Filing date	Mar 18, 2024
Priority date	Sep 20, 2021
Publication date	Apr 15, 2025
Grant date	Apr 15, 2025

Abstract

A lamp for vehicles is provided with a number of light modules that are offset or tilted in relation to one another, such that light distributions of the light modules can be overlapped to obtain a homogenous overall light distribution.

First claim

We claim:

1. A lamp for vehicles, comprising:
two or more light modules, each light module including:
a light source unit that has a number of light sources in a row running in a primary direction (V) and/or in a column, which emit light;
a screen placed in front of the light source unit in a main beam direction (H), with openings spaced apart from one another in the primary direction (V) and positioned to align with the light sources;
a collimator placed in front of the screen in the main beam direction (H), which aligns the light emitted from the light source unit; and
a diffusion lens placed in front of the collimator in the main beam direction (H) that diffuses the light passing through the openings in the screen horizontally and vertically to obtain light spots forming a light distribution, wherein the diffusion lens has a first optical structure on the light-entry side, facing the collimator, which has a number of micro-optical elements, and/or a second optical structure on the light-emitting side, facing away from the collimator, which has a number of micro-optical elements, to deflect the light vertically and/or horizontally,

wherein the two or more light modules are spatially offset to one another,
wherein either:
a first light module and a second light module of the two or more light modules are parallel to one another along the primary direction of the screen, and wherein the second light module is offset to the first light module in only a first direction, which is perpendicular to a plane defined by the primary direction (V) and the main beam direction (H), or
the second light module is offset to the first light module in the first direction and in the primary direction (V), and the light modules are offset to one another in the primary direction (V), such that a row of light pixels from a first light module, and a row of light pixels from a second light module are projected into a row of light spots forming a first light distribution generated by the first light module, or a second light distribution generated by the second light module, which are offset to one another along the primary direction on a measurement projection screen, and

wherein the first and second light module, or the components composed of the light source unit, the screen, and the collimator in the first and second light modules, are pivoted about a tilting axis that is parallel to the primary direction (V) so differently that the rows of light spots in the first light distribution and second light distribution that are offset to one another in the primary direction (V) on the measurement projection screen overlap in the primary direction (V).

2. The lamp according to claim 1 , wherein the light modules are aligned such that the light distributions generated by the light modules are offset equally and in the primary direction (V) to one another.

3. The lamp according to claim 1 , wherein the screen is spaced apart from the collimator.

4. The lamp according to claim 1 , wherein the collimator and/or diffusion lens are made of glass or plastic.

5. The lamp according to claim 1 , wherein the openings in the screen are smaller than light-emitting surfaces of the light sources in the light source unit dedicated thereto.

6. The lamp according to claim 1 , wherein the openings in the screen extend longitudinally and/or laterally at least 0.2 mm less than the longitudinal and/or lateral extension of the light source.

7. The lamp according to claim 1 , wherein the first optical structure on the light-entry side of the diffusion lens is formed by a first micro-optical element of the number of micro-optical elements, and wherein the first micro-optical element is composed of prism elements and arced elements that alternate in the direction transverse to the primary direction (V).

8. The lamp according to claim 7 , wherein the arced elements are each formed on an end of the prism elements facing away from a base of the light-entry side.

9. The lamp according to claim 7 , wherein the prism elements include a peak protruding away from the base of the light-entry side at uniform angles of 2°-8° to the base.

10. The lamp according to claim 9 , wherein a distance (d) between the peaks of the prism elements and the base of the light-entry side decreases as they get closer to the axis.

11. The lamp according to claim 7 , wherein the micro-optical elements in the second optical structure on the light-emitting side form partial cylinders with a cylinder axis that is transverse to the primary direction (V) and to the main beam direction (H).

12. The lamp according to claim 1 , wherein the diffusion lens forms a plate.

13. The lamp according to claim 1 , wherein the diffusion lens is large enough to cover the collimators for all of the light modules projecting in the main beam direction (H).

14. The lamp according to claim 1 , wherein the diffusion lens is tilted in a plane defined by the main beam direction (H) and a direction perpendicular thereto and to the primary axis.

15. The lamp according to claim 1 , wherein there is an odd number of light modules including a first light module, a second light module positioned above the first light module, and a third light module positioned below the first light module, and wherein the first light module forms a reference for the second light module and the third light module.

16. The lamp according to claim 1 , wherein the light modules above a middle light module are tilted at an angle (φ) in a first direction, and the light modules below the middle light module are tilted at the same angle (φ) in the opposite direction.

17. The lamp according to claim 1 , wherein the collimators and the light modules are integrally joined to one another.

18. The lamp according to claim 1 , wherein there are at least three light modules including a reference light module located in a middle position relative to the remaining light modules, and wherein the tilting angle of the light modules increases as the distance to the reference light module in the direction transverse to the primary direction (V) increases.

19. The lamp according to claim 1 , wherein the collimator receives light from a plurality of openings in the screen.

Assignees

• Hella Gmbh & Co Kgaa

Inventors

• Drüppel Mathias
• Fischer Bernd
• Kaup Marc
• Willeke Benjamin

Classifications

• F21S41/151

  arranged in one or more lines · CPC title

• F21S41/40

  characterised by screens, non-reflecting members, light-shielding members or fixed shades · CPC title

• F21S41/143 Primary

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

• F21W2102/145

  wherein the light is emitted between two parallel vertical cutoff lines, e.g. selectively emitted rectangular-shaped high beam · CPC title

• F21S41/663

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