US 11,938,858 B2
Headlight control device, headlight control system, and headlight control method
Nobuya Orihara, Hitachinaka (JP)
Assigned to HITACHI ASTEMO, LTD., Ibaraki (JP)
Appl. No. 17/612,480
Filed by Hitachi Astemo, Ltd., Hitachinaka (JP)
PCT Filed Jun. 2, 2020, PCT No. PCT/JP2020/021704
§ 371(c)(1), (2) Date Nov. 18, 2021,
PCT Pub. No. WO2020/250746, PCT Pub. Date Dec. 17, 2020.
Claims priority of application No. 2019-109494 (JP), filed on Jun. 12, 2019.
Prior Publication US 2022/0194291 A1, Jun. 23, 2022
Int. Cl. B60Q 1/14 (2006.01); B60Q 9/00 (2006.01); G06V 20/56 (2022.01); G06V 20/62 (2022.01); H05B 47/125 (2020.01)
CPC B60Q 1/1423 (2013.01) [G06V 20/56 (2022.01); G06V 20/625 (2022.01); H05B 47/125 (2020.01); B60Q 2300/054 (2013.01); B60Q 2300/41 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A headlight control device that controls a light distribution pattern of a headlight, comprising:
a processor;
a storage device; and
a headlight control program and an image recognition program that are stored in the storage device and executed by the processor, wherein
the headlight control program includes a sequence control section that generates a headlight control signal from an image captured by a camera mounted on a vehicle, and a control value calculation section that calculates a control value for the light distribution pattern in the headlight control signal,
the image recognition program includes a license plate recognition section that detects a license plate of a preceding vehicle from the image, and a cut-off line recognition section that detects a cut-off line of the headlight from the image, and
the control value calculation section calculates the control value for the light distribution pattern such that the cut-off line detected by the cut-off line recognition section is positioned higher by a predetermined height than an upper end of the license plate detected by the license plate recognition section.