公开(公告)号：EP3376833B1

公开(公告)日：2020-08-26

申请号：EP18160837.3

申请日：2018-03-09

申请人： Ricoh Company, Ltd. ,  Kyushu Institute of Technology

发明人： Oka, Yuuki ,  Ueno, Tsuyoshi ,  Abe, Seiya

IPC分类号： H05B33/08 ,  H02M3/158 ,  H02M1/32 ,  H02M1/36 ,  H05B45/37

公开(公告)号：EP3376833A1

公开(公告)日：2018-09-19

申请号：EP18160837.3

申请日：2018-03-09

申请人： Ricoh Company, Ltd. ,  Kyushu Institute of Technology

发明人： Oka, Yuuki ,  Ueno, Tsuyoshi ,  Abe, Seiya

IPC分类号： H05B33/08 ,  H02M3/158

摘要： A drive circuit (101, 201, 301, 401, 501, 601, 701, and 801) is configured to supply a current to a light emitting element (2). The drive circuit (101, 201, 301, 401, 501, 601, 701, and 801) includes a plurality of switching elements (111 and 112) configured to switch between ON/OFF states with a modulation signal, a capacitor (115) connected in parallel with the light emitting element (2), and a control module (113) configured to control the switching elements (111 and 112) so that a voltage of the capacitor (115) does not become lower than a threshold.