公开(公告)号：US09769889B2

公开(公告)日：2017-09-19

申请号：US15183796

申请日：2016-06-16

Applicant: ASUSTeK COMPUTER INC.

Inventor： Tao Jiang ,  Xiaofeng Zhou ,  Ching-Ji Liang

IPC: G05F1/00 ,  H05B37/02 ,  H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0842

Abstract: A driving circuit for providing a driving voltage to a first flash light-emitting diode is provided. The driving circuit includes an inductor, a first switch, a second switch, a capacitor, a third switch, a fourth switch and a control unit. The control unit controls operating modes of the inductor and the capacitor to a boost mode or a buck mode according to a driving mode of the first flash light-emitting diode, and determines whether to switch the operating modes of the inductor and the capacitor according to a first driving current flowing through the first flash light-emitting diode. An operating method for the driving circuit is also provided.

公开(公告)号：US20160374163A1

公开(公告)日：2016-12-22

申请号：US15183796

申请日：2016-06-16

Applicant: ASUSTeK COMPUTER INC.

Inventor： Tao Jiang ,  Xiaofeng Zhou ,  Ching-Ji Liang

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0842

Abstract: A driving circuit for providing a driving voltage to a first flash light-emitting diode is provided. The driving circuit includes an inductor, a first switch, a second switch, a capacitor, a third switch, a fourth switch and a control unit. The control unit controls operating modes of the inductor and the capacitor to a boost mode or a buck mode according to a driving mode of the first flash light-emitting diode, and determines whether to switch the operating modes of the inductor and the capacitor according to a first driving current flowing through the first flash light-emitting diode. An operating method for the driving circuit is also provided.

Abstract translation: 提供了用于向第一闪光发光二极管提供驱动电压的驱动电路。 驱动电路包括电感器，第一开关，第二开关，电容器，第三开关，第四开关和控制单元。 根据第一闪光发光二极管的驱动模式，控制单元将电感器和电容器的工作模式控制为升压模式或降压模式，并且根据第一闪光发光二极管的驱动模式确定是否切换电感器和电容器的工作模式 流过第一闪光发光二极管的第一驱动电流。 还提供了用于驱动电路的操作方法。