LED Lamp with a Brightness Control Device

• US 20170080849A1
• Filed: 09/21/2016
• Published: 03/23/2017
• Est. Priority Date: 09/21/2015
• Status: Active Grant

• Current Assignee: Zedel
• Original Assignee: Zedel
• Inventors: Nogha Mbai, Christophe, Berrel, Philippe
• Granted Patent: US 9,862,303 B2
• Time in Patent Office: Days
• CPC Class Codes: B60Q 1/1423 Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
• CPC Class Codes: F21L 4/025 the light sources being of different shape or type
• CPC Class Codes: F21L 4/027 the light sources being a LED
• CPC Class Codes: F21V 23/0464 the sensor sensing the level of ambient illumination, e.g. dawn or dusk sensors
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: H05B 31/50 specially adapted for ac
• CPC Class Codes: H05B 45/12 using optical feedback
• CPC Class Codes: H05B 47/105 in response to determined parameters

Abstract

The present invention provides a headlamp capable of producing different light beams and fitted with a dynamic control mechanism for controlling the brightness minimizing light interference in all situations. The lamp comprises a light source with LED-type diodes; means for controlling the brightness and/or the geometry of the light beam; capturing means for generating an electrical signal representative of the reflected light intensity of the area illuminated by said light beam onto an illuminated object; and a control unit for generating control signals from the information generated by said capture system. The lamp has capturing means includes a focal system having a variable field under control of the control unit. Preferably, the capturing means includes at least two sensors with fixed focal length or, alternatively, a single sensor may be combined with a single controllable focal system electrically.

Claims

1. A lamp comprising

a light source having one or more LED-type diodes;

means for controlling the brightness and/or the geometry of said light beam of said light source in response to a control information or control signal;

capturing means for sensing light and generating an electrical signal representative of the reflected light intensity of the area illuminated by said light;

a control unit for generating said control information or said control signal from the information generated by said capturing means;

wherein said capturing means is associated with a variable focal field controlled by said control unit to generate corresponding electrical signals at different focal lengths.

2. The lamp according to claim 1 wherein said capturing means comprises:

a first sensor associated with a first optical system for generating an electrical signal representative of the reflected light intensity of the area illuminated by said light beam onto an illuminated object;

a second sensor associated with a separate second optical system of the first optical system to generate a second information representative of the reflected light intensity of the illuminated area,

wherein said control unit is adapted to select one or the other signals generated by said first and second sensor, the control of said light beam resulting from the information generated by one or the other of said sensors.

3. The lamp according to claim 1 wherein said capturing means comprises

a sensor associated with an optical system is electrically controllable and configured to be controlled by said control unit,

wherein said control unit jointly generates said control signal or control information for controlling the brightness and said control signal controlling said electrically controllable optical system.

4. The lamp of claim 2 wherein the light source comprises a display unit having at least two LEDs, each having a focal own optical system and whose power supply is controlled by said control information or control signal.

5. The lamp of claim 2 wherein the light source comprises one or more LED(s) associated with a controllable optical system, said optical system being controlled by said control information or said control signal.

6. The lamp according to claim 1, wherein said control module further comprises telemetry means for determining the distance to an object in order to jointly use the measurement of distance for the generation of control information or control signal of the light beam and/or the capture angle of said capturing means.

7. The lamp according to claim 1 wherein the control unit is configured with parameters corresponding to a plurality of predetermined profiles.

8. The lamp of claim 6 wherein said configuration is performed via a USB port for communication with a computer, a touchscreen tablet, or smartphone.

9. The lamp according to claim 1 wherein it consists of a headlamp.

10. A method of providing a lamp comprising

a light source having one or more LED-type diodes;

controlling the brightness and/or the geometry of said light beam of said light source in response to a control information or control signal;

sensing light and generating an electrical signal representative of the reflected light intensity of the area illuminated by said light, by a capturing means;

a control unit for generating said control information or said control signal from the information generated by said capturing means;

wherein said capturing means is associated with a variable focal field controlled by said control unit to generate corresponding electrical signals at different focal lengths.

11. The method according to claim 10 wherein said capturing means comprises:

a first sensor associated with a first optical system for generating an electrical signal representative of the reflected light intensity of the area illuminated by said light beam onto an illuminated object;

a second sensor associated with a separate second optical system of the first optical system to generate a second information representative of the reflected light intensity of the illuminated area,

wherein said control unit is adapted to select one or the other signals generated by said first and second sensor, the control of said light beam resulting from the information generated by one or the other of said sensors.

12. The method according to claim 10 wherein said capturing means comprises

a sensor associated with an optical system is electrically controllable and is controlled by said control unit,

wherein said control unit jointly generates said control signal or control information for controlling the brightness and said control signal controlling said electrically controllable optical system.

13. The method of claim 11 wherein the light source comprises a display unit having at least two LEDs, each having a focal own optical system and whose power supply is controlled by said control information or control signal.

14. The method of claim 11 wherein the light source comprises one or more LED (s) associated with a controllable optical system, said optical system being controlled by said control information or said control signal.

15. The method according to claim 10, wherein said control module further comprises determining the distance to an object, by telemetry means in order to jointly use the measurement of distance for the generation of control information or control signal of the light beam and/or the capture angle of said capturing means.

16. The method according to claim 10 wherein the control unit has parameters corresponding to a plurality of predetermined profiles.

17. The method of claim 15 wherein said configuration is performed via a USB port for communication with a computer, a touchscreen tablet, or smartphone.

18. The method according to claim 10 wherein it consists of a headlamp.