Vehicle headlamp system with obstacle sensor and heated photochromic lens

• US 10,197,236 B2
• Filed: 04/21/2017
• Issued: 02/05/2019
• Est. Priority Date: 04/21/2017
• Status: Active Grant

• Current Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Original Assignee: Ford Global Technologies, LLC (Ford Motor Company)
• Inventors: Robinson, Connor I.
• Primary Examiner(s): Negron, Ismael
• Application Number:
  US15/493,610
• Publication Number:
  US 20180306401A1
• Time in Patent Office: 655 Days
• CPC Class Codes: B60Q 1/0023 the element being a sensor, e.g. distance sensor, camera
• CPC Class Codes: B60Q 1/085 due to special conditions, e.g. adverse weather, type of road, badly illuminated road signs or potential dangers B60Q1/10, B60Q1/12, B60Q1/1423 take precedence
• CPC Class Codes: B60Q 1/143 combined with another condition, e.g. using vehicle recognition from camera images or activation of wipers
• CPC Class Codes: B60Q 2300/42 oncoming vehicle
• CPC Class Codes: B60Q 2300/45 Special conditions, e.g. pedestrians, road signs or potential dangers
• CPC Class Codes: F21S 41/13 Ultraviolet light; Infrared light
• CPC Class Codes: F21S 41/18 Combination of light sources of different types or shapes
• CPC Class Codes: F21S 41/28 Cover glass
• 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 41/321 the reflector being a surface of revolution or a planar surface, e.g. truncated
• CPC Class Codes: F21S 41/43 characterised by the shape thereof
• CPC Class Codes: F21S 41/64 by changing their light transmissivity, e.g. by liquid crystal or electrochromic devices
• CPC Class Codes: F21S 41/645 by electro-optic means, e.g. liquid crystal or electrochromic devices
• CPC Class Codes: F21S 41/657 by moving light sources
• CPC Class Codes: F21S 41/663 by switching light sources by switching incandescent light sources F21S41/162
• CPC Class Codes: F21S 45/60 Heating of lighting devices, e.g. for demisting

Abstract

A vehicle headlamp system that includes: a photochromic lens, a primary light source for transmitting a headlamp pattern, a secondary light source for emitting UV light to darken the photochromic lens, a lens heating system, an imaging sensor for detecting an object external to the vehicle, and a controller for activating the secondary light source and the heating system, in response to data provided by the sensor, to darken or lighten a portion of the lens and prevent light from the primary light source from passing through the lens.

Claims

1. A headlamp system for a vehicle, comprising:

a headlamp comprising a photochromic lens, a primary light source for transmitting a headlamp pattern, a secondary light source and a lens heating system;

an imaging sensor; and

a controller that directs the secondary light source and the heating system to darken and lighten a portion of the lens in response to an exterior object sensed by the sensor.

2. The system according to claim 1, wherein the photochromic lens comprises an inner lens, the inner lens comprising a photochromic element, and further wherein the photochromic lens further comprises an outer lens, the outer lens comprising an ultraviolet light shielding element.

3. The system according to claim 1, wherein the lens heating system comprises a heating element, the element comprising a plurality of heat-conducting fibers within the lens for heating portions of the lens.

4. The system according to claim 1, wherein the controller is further configured to direct the heating system to heat the portion of the lens in response to the exterior object sensed by the sensor.

5. The system according to claim 1, wherein the lens heating system comprises a heating element, the element comprising a heating source for indirectly heating the lens.

6. The system according to claim 1, wherein the headlamp pattern is a high beam headlamp pattern, and the sensor configured to sense a pedestrian, an oncoming vehicle, other traffic, or an animal located within the headlamp pattern.

7. A headlamp system for a vehicle, comprising:

a headlamp comprising a photochromic lens, a primary light source for transmitting a headlamp pattern, a plurality of secondary light sources and a lens heating system;

an imaging sensor; and

a controller that directs the secondary light sources and the heating system to darken and lighten a portion of the lens in response to an exterior object sensed by the sensor.

8. The system according to claim 7, wherein the photochromic lens comprises an inner lens, the inner lens comprising a photochromic element, and further wherein the photochromic lens further comprises an outer lens, the outer lens comprising an ultraviolet light shielding element.

9. The system according to claim 7, wherein the lens heating system comprises a heating element, the element comprising a plurality of heat-conducting fibers within the lens for heating portions of the lens.

10. The system according to claim 7, wherein the controller is further configured to direct the heating system to heat the portion of the lens in response to the exterior object sensed by the sensor.

11. The system according to claim 7, wherein the controller is further adapted to return the portion of the lens to a non-darkened state by deactivating the secondary light sources and directing the heating system to heat the portion of the lens in response to the object being located outside of the headlamp pattern.

12. The system according to claim 7, wherein the lens heating system comprises a heating element, the element comprising a heating source for indirectly heating the lens.

13. The system according to claim 7, wherein the headlamp pattern is a high beam headlamp pattern, and the sensor configured to sense a pedestrian, an oncoming vehicle, other traffic, or an animal located within the headlamp pattern.

14. A headlamp system for a vehicle, comprising:

a headlamp comprising a photochromic lens, a primary light source for transmitting a headlamp pattern, a movable secondary light source coupled to a positioning system, and a lens heating system;

an imaging sensor; and

a controller that directs the secondary light source, the positioning system, and the heating system to darken and lighten a portion of the lens in response to an exterior object sensed by the sensor.

15. The system according to claim 14, wherein the photochromic lens comprises an inner lens, the inner lens comprising a photochromic element, and further wherein the photochromic lens further comprises an outer lens, the outer lens comprising an ultraviolet light shielding element.

16. The system according to claim 14, wherein the lens heating system comprises a heating element, the element comprising a plurality of heat-conducting fibers within the lens for heating portions of the lens.

17. The system according to claim 14, wherein the controller is further configured to direct the heating system to heat the portion of the lens in response to the exterior object sensed by the sensor.

18. The system according to claim 14, wherein the controller is further adapted to return the portion of the lens to a non-darkened state by deactivating the secondary light source and directing the heating system to heat the portion of the lens in response to the object being located outside of the headlamp pattern.

19. The system according to claim 14, wherein the lens heating system comprises a heating element, the element comprising a heating source for indirectly heating the lens.

20. The system according to claim 14, wherein the headlamp pattern is a high beam headlamp pattern, and the sensor configured to sense a pedestrian, an oncoming vehicle, other traffic, or an animal located within the headlamp pattern.