Low and high beam headlamp
View Patent ↗A vehicle headlamp system having a headlamp module and a processor. The headlamp module may include a light source and a reflector. The light source may include a plurality of light emitters which are individually controllable by the processor. The reflector may include a plurality of facets for reflecting the light received from the light source. The headlamp module is capable of switching between high and low beam light without mechanically movable components.
1. A vehicle headlamp module, comprising:
a housing carrying:
a fixed light source located within an interior space of a housing, the light source having a plurality of light emitters which may be independently actuated ON or OFF to emit light;
a fixed reflector having a plurality of facets located within the interior space of the housing and coupled thereto and positioned to receive light from the light source and directionally control the light, wherein each of the plurality of facets comprises at least one of: a flat region or a curved region, wherein the reflector is substantially responsible for redirecting light from the plurality of emitters;
an at least partially transparent and lens-less window for transmission of the light redirected by the fixed reflector; and
a processor,
wherein the processor operates in a first mode to actuate a first set of one or more of the plurality of light emitters, the light emitter(s) of the first set being positioned relative to the facets of the reflector so as to provide a first beam pattern, wherein the first beam pattern is a low beam pattern, and
wherein the processor operates in a second mode to actuate a second set of one or more of the plurality of light emitters, the light emitter(s) of the second set being positioned relative to the facets of the reflector so as to provide a second beam pattern, wherein the second beam pattern is a high beam pattern.
2. A vehicle headlamp module, comprising:
a light source located within an interior space of a housing, the light source having a plurality of light emitters which may be actuated ON or OFF;
a reflector having a plurality of facets located within the interior space of the housing and coupled thereto and positioned to receive light from the light source and directionally control the light; and
a processor,
wherein the processor operates in a first mode to actuate a first set of one or more of the plurality of light emitters, the light emitter(s) of the first set being positioned relative to the facets of the reflector so as to provide a first beam pattern,
wherein the processor operates in a second mode to actuate a second set of one or more of the plurality of light emitters, the light emitter(s) of the second set being positioned relative to the facets of the reflector so as to provide a second beam pattern,
wherein the processor is coupled to an electronic control unit (ECU) within the vehicle, wherein the ECU is coupled to and receives input from one or more turning angle detectors,
wherein when the ECU receives input indicating the at least one wheel is oriented to the right, the processor operates in a fourth mode to actuate a fourth set of one or more of the plurality of light emitters and the headlight is shifted to the right using the facets of the reflector, and
wherein when the ECU receives input indicating the at least one wheel is oriented to the left, the processor operates in a fifth mode to actuate a fifth set of one or more of the plurality of light emitters and the headlight is shifted to the left using the facets of the reflector.
3. A method of switching between a low beam and a high beam of a vehicle headlamp module without mechanically movable components, comprising the steps of:
providing a predetermined amount of power to a first set of one or more of the plurality of light emitters in a light source, wherein the light source is located in a vehicle headlamp module which comprises:
a housing;
the light source, wherein the light source is fixedly mounted within an interior space of the housing, wherein the light source comprises at least two substrate portions lying in different Cartesian planes, wherein each of the at least two substrate portions carry at least one of the plurality of light emitters; and
a reflector having a plurality of facets, wherein the reflector is fixedly mounted within an interior space of the housing, and wherein the reflector is oriented to receive light from the light source;
receiving a command to switch between the low beam and the high beam at a processor, wherein the processor is electrically coupled to the light source; and then
providing a predetermined amount of power to a second set of one or more of the plurality of light emitters in the light source.
4. A vehicle headlamp system, comprising:
a headlamp module, comprising:
a light source located within an interior space of a housing, the light source having a plurality of light emitters which may be actuated ON or OFF, wherein the light emitters have a 3-D (three-dimensional) arrangement so that at least one of the light emitters is not in the same plane as at least one of the other light emitters; and
a reflector having a plurality of facets located within the interior space of the housing and coupled thereto and positioned to receive light from the light source and directionally control the light; and
a processor responsive to user input,
wherein the processor operates in a first mode to actuate a first set of one or more of the plurality of light emitters, the light emitter(s) of the first set being positioned relative to the facets of the reflector so as to provide a first beam pattern, and
wherein the processor operates in a second mode to actuate a second set of one or more of the plurality of light emitters, the light emitter(s) of the second set being positioned relative to the facets of the reflector so as to provide a second beam pattern.
5. The vehicle headlamp system as defined in claim 4 , wherein the processor is located within the headlamp module.
6. The vehicle headlamp system as defined in claim 4 , wherein the headlamp is a sealed beam headlamp module.
7. The vehicle headlamp system as defined in claim 4 , wherein the processor operates in a third mode to actuate a third set of one or more of the plurality of light emitters, the light emitted therefrom directionally located by the facets of the reflector to provide a third beam pattern, wherein any switching between the first, second, or third beam patterns does not require any mechanically movable parts.
8. The vehicle headlamp system as defined in claim 4 , wherein the light emitters are LEDs, wherein the light source includes at least one multi-chip LED, at least one single-chip LED, or both.
9. The vehicle headlamp system as defined in claim 8 , wherein the LEDs are arranged in two adjacent single row arrays on a two-dimensional substrate, wherein the arrangement includes a 12×1 array and a 5×1 array.
10. The vehicle headlamp system as defined in claim 8 , wherein the LEDs are arranged in a arrangement of at least one of the following: a triangle-shaped, hexagonally-shaped, diamond-shaped, or quadrilaterally-shaped arrangement.
11. The vehicle headlamp system as defined in claim 4 , wherein the vehicle headlamp is a lens-less LED headlamp.
12. The vehicle headlamp system as defined in claim 4 , wherein the vehicle headlamp module does not require any mechanically or electro-mechanically movable parts to switch the first beam pattern to the second beam pattern, or vice-versa.
13. The vehicle headlamp system as defined in claim 4 , wherein the processor alters the intensity of the beam patterns by controlling which of the plurality of light emitters are ON.
14. The vehicle headlamp system as defined in claim 4 , wherein the processor alters the intensity of the beam patterns by managing the power to at least one light emitter using pulse-width modulation.
15. The vehicle headlamp system as defined in claim 4 , wherein processor deviates the direction of the beam pattern to the right or left by controlling which of the plurality of light emitters are ON.
16. The vehicle headlamp system as defined in claim 4 , wherein the reflector is formed to provide the first and second beam patterns in accordance with motor vehicle specification Federal Motor Vehicle Safety Standard 108 (FMVSS108), wherein the two beam patterns are each defined by light intensities at a finite set of points in a planar surface.
17. The vehicle headlamp system as defined in claim 4 ,
wherein the processor is coupled to an electronic control unit (ECU) within the vehicle, wherein the ECU is coupled to and receives input from one or more turning angle detectors,
wherein when the ECU receives input indicating the at least one wheel is oriented to the right, the processor operates in a fourth mode to actuate a fourth set of one or more of the plurality of light emitters and the headlight is shifted to the right using the facets of the reflector, and
wherein when the ECU receives input indicating the at least one wheel is oriented to the left, the processor operates in a fifth mode to actuate a fifth set of one or more of the plurality of light emitters and the headlight is shifted to the left using the facets of the reflector.