Headlight module

• US 9,702,519 B2
• Filed: 01/12/2015
• Issued: 07/11/2017
• Est. Priority Date: 05/12/2010
• Status: Active Grant

• Current Assignee: OSRAM GmbH (Ams-Osram AG)
• Original Assignee: OSRAM GmbH (Ams-Osram AG)
• Inventors: Reiners, Thomas
• Primary Examiner(s): Tso, Laura
• Application Number:
  US14/594,937
• Publication Number:
  US 20150124468A1
• Time in Patent Office: 911 Days
• Field of Search: 362510, 362 84, 362507, 362509, 362514, 362516, 362517, 362538
• CPC Class Codes: F21S 41/13 Ultraviolet light; Infrared light
• CPC Class Codes: F21S 41/16 Laser light sources
• CPC Class Codes: F21S 41/176 Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
• CPC Class Codes: F21S 41/255 Lenses with a front view of circular or truncated circular outline
• CPC Class Codes: F21S 41/285 Refractors, transparent cover plates, light guides or filters not provided in groups F21S41/24-F21S41/28
• CPC Class Codes: F21S 41/663 by switching light sources by switching incandescent light sources F21S41/162
• CPC Class Codes: F21S 41/675 by moving reflectors
• CPC Class Codes: F21S 45/43 using gas
• CPC Class Codes: F21S 45/47 Passive cooling, e.g. using fins, thermal conductive elements or openings
• CPC Class Codes: F21S 45/70 Prevention of harmful light leakage

Abstract

A headlight module comprising separate phosphors which can be excited by electromagnetic radiation to emit light, and at least one radiation source for exciting the phosphors. Each phosphor is associated with an optical device, so that light emitted by the optical devices is merged into an overall image. Beam splitter devices and beam directing devices are disposed such that electromagnetic radiation emitted by the at least one radiation source is directed on the phosphors. A control device is provided for controlling operation of the at least one radiation source and the beam directing devices.

Claims

1. A headlight module comprising:

separate phosphors adapted to be excited by electromagnetic radiation to emit light; and

at least one radiation source for exciting the phosphors;

each phosphor having an associated optical device, said optical devices being configured so that light emitted by said optical devices is merged into an overall image;

beam splitter devices and beam directing devices disposed such that electromagnetic radiation emitted by said at least one radiation source is directed on the phosphors; and

a control device for controlling operation of the at least one radiation source and the beam directing devices.

2. The headlight module as claimed in claim 1, wherein the beam directing devices are micromirrors which are pivotable about two axis.

3. The headlight module as claimed in claim 2, wherein the control device comprises a horizontal/vertical deflection unit for horizontal and vertical deflection of the micromirrors.

4. The headlight module as claimed in claim 3, wherein the control device is configured to match an angular range of the horizontal and vertical deflection of the micromirrors to a required light distribution.

5. The headlight module as claimed in claim 3, wherein the control device and the micromirrors are configured to operate at different frequencies for horizontal and vertical deflection of the micromirrors.

6. The headlight module as claimed in claim 1, wherein the control device is configured to control operation of the beam directing devices and the at least one radiation source in a fixed grid so that a light distribution of the headlight in angle ranges of plus 50°

to minus 50°

horizontally, minus 15°

to plus 10°

vertically is achieved.

7. The headlight module as claimed in claim 6, wherein the control device is configured to briefly switch off the at least one radiation source during sweeping of sectors of said angle ranges in which no light is currently required.

8. The headlight module as claimed in claim 1, wherein at least one of the phosphors is arranged on a curved surface.

9. The headlight module as claimed in claim 1, wherein each of the phosphors is activated by a respective beam directing device.