Title:
VEHICLE LAMP AND LIGHTING CIRCUIT FOR SAME
Document Type and Number:
WIPO Patent Application WO/2020/209295
Kind Code:
A1
Abstract:
The present invention provides a lighting circuit 300 for driving a blue first semiconductor light source 202 and a green second semiconductor light source 204. A first drive circuit 310 feeds, to the first semiconductor light source 202, a first drive current ILED1 stabilized at a first target amount IREF1. A second drive circuit 320 feeds, to the second semiconductor light source 204, a second drive current ILED2 stabilized at a second target amount IREF2. The lighting circuit 300 varies, in accordance with the output of a temperature sensor 330, the relative balance between the first target amount IREF1 and the second target amount IREF2.
Inventors:
ICHIKAWA TOMOYUKI (JP)
Application Number:
PCT/JP2020/015845
Publication Date:
October 15, 2020
Filing Date:
April 08, 2020
Export Citation:
Assignee:
KOITO MFG CO LTD (JP)
International Classes:
H05B45/28; B60Q1/00; H01L33/00
Foreign References:
| JP2017054799A | 2017-03-16 | |||
| JP2017010810A | 2017-01-12 | |||
| JP2006171693A | 2006-06-29 | |||
| JP2017143692A | 2017-08-17 | |||
| JP2003178611A | 2003-06-27 | |||
| JP2012164594A | 2012-08-30 |
Attorney, Agent or Firm:
MORISHITA Sakaki (JP)
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