公开(公告)号：US20180063931A1

公开(公告)日：2018-03-01

申请号：US15682660

申请日：2017-08-22

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Yuya YAMAMOTO ,  Toshifumi OGATA ,  Shigeru IDO ,  Shun KUSUDA

IPC: H05B39/04 ,  H05B33/08

CPC classification number: H05B39/041 ,  H05B33/0803 ,  H05B33/083

Abstract: A light-emitting device includes a light emission controller which causes first and second light-emitting element groups to emit light, by supplying undulating voltage to the first and second light-emitting element groups. The light emission controller supplies the undulating voltage to the first light-emitting element group, during a first period in which a magnitude of the undulating voltage is greater than a first predetermined value and at most a second predetermined value. The second predetermined value is less than a maximum value of the undulating voltage. The light emission controller supplies the undulating voltage to the first and second light-emitting element groups during a second period in which the magnitude of the undulating voltage is greater than the second predetermined value. The first light-emitting element group surrounds the second light-emitting element group.

公开(公告)号：US20180266667A1

公开(公告)日：2018-09-20

申请号：US15913080

申请日：2018-03-06

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Shun KUSUDA

IPC: F21V23/02 ,  H05K1/18 ,  H05K1/11 ,  F21V15/01 ,  H05B33/08 ,  F21V17/08

CPC classification number: F21V23/02 ,  F21V3/00 ,  F21V7/041 ,  F21V7/28 ,  F21V15/01 ,  F21V17/08 ,  F21W2131/10 ,  F21Y2115/10 ,  H05B33/0815 ,  H05B37/02 ,  H05K1/0233 ,  H05K1/115 ,  H05K1/181 ,  H05K2201/09027 ,  H05K2201/09063 ,  H05K2201/10015 ,  H05K2201/1003 ,  H05K2201/10106 ,  H05K2201/10166 ,  H05K2201/10522

Abstract: A circuit board includes: an inductor and a control IC which are included in a switching power supply circuit; and a substrate having a first face, a second face on a reverse side of the first face, and an opening in a center portion of the substrate. The inductor is disposed on the first face, the control IC is disposed on the second face, and at least part of the inductor overlaps with at least part of the control IC when viewed from a direction perpendicular to the first face.

公开(公告)号：US20180063903A1

公开(公告)日：2018-03-01

申请号：US15671242

申请日：2017-08-08

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Yuya YAMAMOTO ,  Toshifumi OGATA ,  Shigeru IDO ,  Shun KUSUDA

IPC: H05B33/08 ,  F21S8/02 ,  F21V23/00 ,  F21V23/06 ,  F21V29/89 ,  H01L33/50

CPC classification number: H05B33/083 ,  F21K9/20 ,  F21S8/02 ,  F21V5/04 ,  F21V23/005 ,  F21V23/06 ,  F21V29/89 ,  F21Y2115/10 ,  H01L25/0753 ,  H01L25/167 ,  H01L33/50 ,  H01L33/508 ,  H01L33/52

Abstract: A light-emitting device includes a light emission controller which causes first and second light-emitting element groups to emit light, by supplying undulating voltage to the first and second light-emitting element groups. The light emission controller supplies the undulating voltage to the first light-emitting element group during a first period in which a magnitude of the undulating voltage is greater than a first predetermined value and at most a second predetermined value. The second predetermined value is less than a maximum value of the undulating voltage. The light emission controller supplies the undulating voltage to the first and second light-emitting element groups during a second period in which the magnitude of the undulating voltage is greater than the second predetermined value. The second light-emitting element group surrounds the first light-emitting element group.