US 12,139,062 B2
Automotive lamp system
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 Nov. 23, 2022, as Appl. No. 18/058,385.
Application 18/058,385 is a continuation of application No. PCT/JP2021/019412, filed on May 21, 2021.
Claims priority of application No. 2020-094517 (JP), filed on May 29, 2020; application No. 2020-094657 (JP), filed on May 29, 2020; application No. 2020-094918 (JP), filed on May 29, 2020; and application No. 2020-094919 (JP), filed on May 29, 2020.
Prior Publication US 2023/0093633 A1, Mar. 23, 2023
Int. Cl. B60Q 1/08 (2006.01); B60Q 11/00 (2006.01); H05B 45/37 (2020.01); H05B 45/50 (2022.01)
CPC B60Q 1/08 (2013.01) [B60Q 11/005 (2013.01); H05B 45/37 (2020.01); H05B 45/50 (2020.01)] 22 Claims
OG exemplary drawing
 
1. A lamp system comprising:
a variable light distribution light source comprising an array-type light-emitting device that comprises a power supply terminal and a plurality of pixel circuits electrically coupled in parallel and spatially arranged in a matrix; and
a power supply circuit comprising a power supply unit structured to supply electric power to the array-type light-emitting device,
wherein the power supply unit comprises:
a DC/DC converter having an output coupled to the power supply terminal of the array-type light-emitting device via a power supply line;
a voltage setting circuit structured to generate a controllable correction voltage;
a feedback circuit structured to generate a feedback voltage based on a control target voltage that corresponds to an output voltage of the DC/DC converter and the correction voltage; and
a converter controller having a feedback pin coupled to receive the feedback voltage and structured to control the DC/DC converter such that the feedback voltage approaches a predetermined target voltage.