Title:
VEHICLE LIGHTING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/241451
Kind Code:
A1
Abstract:
A variable light distribution light source 210 includes an array-type light-emitting device 212. The array-type light-emitting device 212 has: a power supply terminal VDD; and a plurality of pixel circuits PIX that are electrically connected in parallel to each other and are spatially arranged in a matrix shape. A power supply circuit 220 includes a power supply unit 222 that supplies power to the array-type light-emitting device 212. The output of a DC/DC converter 224 is connected to the power supply terminal VDD of the array-type light-emitting device 212 via an output terminal OUT. A voltage setting circuit 230 generates a controllable correction voltage VCNT. A feedback circuit 226 generates a feedback voltage VFB on the basis of a control target voltage VCNT according to an output voltage VOUT of the DC/DC converter 224 and the correction voltage VCMP, and supplies said feedback voltage to a feedback pin FB of a converter controller 228.
Inventors:
OTA YU (JP)
KATO MASASHI (JP)
YANAGIZU SHOHEI (JP)
KIKUCHI SATOSHI (JP)
KATO MASASHI (JP)
YANAGIZU SHOHEI (JP)
KIKUCHI SATOSHI (JP)
Application Number:
PCT/JP2021/019412
Publication Date:
December 02, 2021
Filing Date:
May 21, 2021
Export Citation:
Assignee:
KOITO MFG CO LTD (JP)
International Classes:
B60Q11/00; B60Q1/04; B60Q1/14; H05B45/305; H05B45/325; H05B45/375; H05B45/48; H05B47/105; H05B47/14; H05B47/20
Foreign References:
| JP2015155280A | 2015-08-27 | |||
| JP2017212340A | 2017-11-30 | |||
| JP2013008615A | 2013-01-10 | |||
| JP2015116915A | 2015-06-25 | |||
| JP2011515027A | 2011-05-12 | |||
| JP2007295641A | 2007-11-08 | |||
| JP2010272410A | 2010-12-02 | |||
| JP2012125074A | 2012-06-28 | |||
| JP2011139609A | 2011-07-14 | |||
| JP2017117606A | 2017-06-29 | |||
| JP2018172038A | 2018-11-08 |
Other References:
See also references of EP 4159540A4
Attorney, Agent or Firm:
MORISHITA Sakaki (JP)
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