Vehicle head lamp driving apparatus and vehicle provided with same

Patent metadata

Field	Value
Publication number	US-10029607-B2
Application number	US-201515502272-A
Country	US
Kind code	B2
Filing date	Aug 6, 2015
Priority date	Aug 7, 2014
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

The present invention relates to a vehicle head lamp driving apparatus and a vehicle provided with the same. The vehicle head lamp driving apparatus of the present invention comprises: a light output unit to output structured visible light to the front of a vehicle; a light receiving unit to receive reception light corresponding to the structured visible light; and a processor to calculate a distance to and a location of an object positioned in front of the vehicle, on the basis of the received reception light and structured visible light, wherein the light output unit comprises: a laser diode to output structured visible light having a first color; a light conversion unit for converting, into structured visible light having second and third colors, at least a part of the structured visible light having the first color; and a light diffusing unit for diffusing and outputting the structured visible light having the first to third colors to the front of the vehicle. Therefore, the distance to the object in front of the vehicle can be detected on the basis of visible light.

First claim

The invention claimed is:

1. An apparatus for driving a vehicle head lamp, the apparatus comprising:
a light output unit to output structured visible light ahead of a vehicle;
a light receiving unit to receive reception light corresponding to the structured visible light; and
a processor to calculate a distance and position of an object ahead of the vehicle based on the received reception light and the structured visible light,
wherein the light output unit comprises:
a laser diode to output structured visible light of a first color;
a light converter to convert at least part of the structured visible light of the first color to structured visible light of a second color and a third color; and
a light diffuser to diffuse the structured visible light of the first, second, and third colors ahead of the vehicle,

wherein the processor generates a disparity map for an area ahead of the vehicle based on a phase difference between the received reception light and the structured visible light, and calculates the distance and position of the object ahead of the vehicle based on the disparity map.

2. The apparatus according to claim 1 , wherein the light converter comprises:
a first phosphor to convert the structured visible light of the first color to the structured visible light of the second color; and
a second phosphor to convert the structured visible light of the first color to the structured visible light of the third color.

3. The apparatus according to claim 1 , wherein the light converter further comprises a mirror to change an optical path of the structured visible light of the first color, and
wherein the first phosphor and the second phosphor are coated on the mirror.

4. The apparatus according to claim 1 , wherein the light receiving unit comprises:
an infrared blocking filter; and
a light detector to convert the reception light passed through the infrared blocking filter to an electrical signal.

5. The apparatus according to claim 1 , wherein the processor changes at least one of an output direction, an output intensity, and an output distance of the structured visible light of the light output unit based on the distance and position of the object ahead of the vehicle.

6. The apparatus according to claim 5 , wherein the light output unit comprises a scanner to externally output the structured visible light by scanning, and
wherein the processor changes the output direction of the structured visible light or the intensity of the structured visible light output from the light output unit by controlling a scanning direction of the scanner based on the distance and position of the object ahead of the vehicle.

7. The apparatus according to claim 1 , further comprising an illumination sensor to sense an ambient illuminance of the vehicle, and
wherein the processor changes an intensity of the structured visible light output from the light output unit based on the sensed illuminance.

8. The apparatus according to claim 1 , wherein the processor changes at least one of an output direction, an output intensity, and an output distance of the structured visible light output from the light output unit based on a steering direction change signal of the vehicle.

9. An apparatus for driving a vehicle head lamp, the apparatus comprising:
a communication unit to exchange data with an external device;
a light output unit to output structured visible light ahead of a vehicle;
a light receiving unit to receive reception light corresponding to the structured visible light; and
a processor to calculate a distance and position of an object ahead of the vehicle based on the received reception light and the structured visible light,
wherein the light output unit comprises:
a laser diode to output structured visible light of a first color;
a light converter to convert at least part of the structured visible light of the first color to structured visible light of a second color and a third color; and
a light diffuser to diffuse the structured visible light of the first, second, and third colors ahead of the vehicle,

wherein upon receipt of a light output unit operation signal through the communication unit, the processor outputs the structured visible light through the light output unit, or the processor sets at least one of an output direction, an output intensity, and an output distance of the structured visible light based on data received through the communication unit.

10. An apparatus for driving a vehicle head lamp, the apparatus comprising:
a first light output unit to output structured visible light ahead of a vehicle;
a second light output unit to output infrared light;
a light receiving unit to receive first reception light corresponding to the structured visible light or second reception light corresponding to the infrared light; and
a processor to calculate a distance and position of an object ahead of the vehicle based on the received first reception light and the structured visible light, or based on the received second reception light and the infrared light,
wherein the processor changes at least one of an output direction, an output intensity, and an output distance of the structured visible light of the first light output unit or the infrared light of the second light output unit based on the distance and position of the object ahead of the vehicle,
wherein the first light output unit comprises a scanner to externally output the structured visible light and the infrared light by scanning, and
wherein the processor changes the output direction of at least one of the structured visible light and the infrared light or the intensity of the structured visible light output from the light output unit by controlling a scanning direction of the scanner based on the distance and position of the object ahead of the vehicle.

11. The apparatus according to claim 10 , wherein the first light output unit comprises:
a laser diode to output structured visible light of a first color;
a light converter to convert at least part of the structured visible light of the first color to structured visible light of a second color and a third color; and
a light diffuser to diffuse the structured visible light of the first, second, and third colors ahead of the vehicle.

12. A vehicle comprising:
a steering driver to drive a steering apparatus;
a brake driver to drive a brake apparatus;
a power source driver to drive a power source;
a light output unit to output structured visible light ahead of the vehicle;
a light receiving unit to receive reception light corresponding to the structured visible light; and
a processor to calculate a distance and position of an object ahead of the vehicle based on the received reception light and the structured visible light,
wherein the light output unit comprises:
a laser diode to output structured visible light of a first color;
a light converter to convert at least part of the structured visible light of the first color to structured visible light of a second color and a third color; and
a light diffuser to diffuse the structured visible light of the first, second, and third colors ahead of the vehicle,

wherein the processor changes at least one of an output direction, an output intensity, and an output distance of the structured visible light of the light output unit based on the distance and position of the object ahead of the vehicle,
wherein the light output unit comprises a scanner to externally output the structured visible light by scanning, and
wherein the processor changes the output direction of the structured visible light or the intensity of the structured visible light output from the light o

Assignees

• Lg Electronics Inc

Inventors

• Kim Sungmin
• Kim Younsun

Classifications

• F21S41/176

  Light sources where the light is generated by photoluminescent material spaced from a primary light generating element · CPC title

• B60Q1/1423 Primary

  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 title

• F21S41/675

  by moving reflectors · CPC title

• B60W10/04

  including control of propulsion units · CPC title

• B60Q2300/314

  Ambient light · CPC title