US 12,187,183 B2
Vehicular lamp system, power supply circuit
Yu Ota, Shizuoka (JP); Masashi Kato, Shizuoka (JP); Shohei Yanagizu, Shizuoka (JP); and Satoshi Kikuchi, Shizuoka (JP)
Assigned to KOITO MANUFACTURING CO., LTD., Tokyo (JP)
Filed by KOITO MANUFACTURING CO., LTD., Tokyo (JP)
Filed on Dec. 8, 2022, as Appl. No. 18/063,307.
Application 18/063,307 is a continuation of application No. PCT/JP2021/021725, filed on Jun. 8, 2021.
Claims priority of application No. 2020-100450 (JP), filed on Jun. 9, 2020; application No. 2020-100451 (JP), filed on Jun. 9, 2020; and application No. 2020-100452 (JP), filed on Jun. 9, 2020.
Prior Publication US 2023/0108612 A1, Apr. 6, 2023
Int. Cl. B60Q 1/076 (2006.01); B60Q 1/14 (2006.01); B60Q 1/16 (2006.01); F21S 41/663 (2018.01); F21V 23/00 (2015.01); F21Y 115/10 (2016.01); H01L 27/15 (2006.01)
CPC B60Q 1/076 (2013.01) [B60Q 1/1423 (2013.01); B60Q 1/16 (2013.01); F21S 41/663 (2018.01); F21V 23/003 (2013.01); F21Y 2115/10 (2016.08); H01L 27/156 (2013.01)] 30 Claims
OG exemplary drawing
 
1. A lamp system comprising:
an array-type light-emitting device comprising a plurality of pixel circuits electrically coupled in parallel, and spatially arranged in a matrix; and
a power supply circuit structured to supply electric power to the array-type light-emitting device,
wherein the power supply circuit comprises:
a DC/DC converter having an output coupled to the array-type light-emitting device via a power supply cable; and
a power supply control circuit structured to set a target value according to a light distribution pattern, and to control the DC/DC converter such that a control target voltage which is based on an output voltage of the DC/DC converter approaches the target value.