Title:
LIGHT SOURCE DEVICE
Document Type and Number:
Japanese Patent JP2023005157
Kind Code:
A
Abstract:
To provide a technology for reducing electromagnetic noise generated when a plurality of LEDs are driven.SOLUTION: A light source device according to an embodiment of the present disclosure includes a plurality of LEDs 12, a plurality of switching regulators 30, and a control portion 50. The plurality of switching regulators each drive at least one LED. The control portion controls the plurality of switching regulators with switching signals of at least two different frequencies.SELECTED DRAWING: Figure 1
Inventors:
ISHIKAWA CHIAKI
Application Number:
JP2021106899A
Publication Date:
January 18, 2023
Filing Date:
June 28, 2021
Export Citation:
Assignee:
DENSO CORP
International Classes:
H05B45/36; F21V19/00; H05B45/325; H05B45/345; H05B45/375; H05B45/38
Attorney, Agent or Firm:
Nagoya International Patent Attorney Corporation