公开(公告)号：US20210174735A1

公开(公告)日：2021-06-10

申请号：US16770671

申请日：2019-03-06

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Shinwook CHOI ,  Youngsoo KIM ,  Kangmoon SEO

IPC: G09G3/32 ,  H05B45/375 ,  H05B45/48

Abstract: Disclosed is a display device including a power transformer converting an input voltage into a specified voltage, a display driver including a rectifier rectifying a voltage converted through the power transformer and a converter converting a voltage rectified through the rectifier based on a control signal for outputting an image, and a display panel receiving a converted voltage through the display driver to display the image. The display driver may include a voltage drop unit dropping a voltage input through the rectifier. Other various embodiments as understood from the specification are also possible.

公开(公告)号：US20210249950A1

公开(公告)日：2021-08-12

申请号：US16973334

申请日：2019-07-11

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Moonyoung KIM ,  Jeongil KANG ,  Shinwook CHOI

IPC: H02M1/42 ,  H02M3/335

Abstract: An electronic apparatus includes: an operator; and a power circuit configured to supply power to the operator, wherein the power circuit includes a first voltage converter configured to output a first voltage based on input power, and a power factor corrector (PFC) configured to output a second voltage by performing power factor correction for the first voltage, and supplies power based on the first voltage or the second voltage to the operator, wherein the power circuit stops an operation of the PFC, lowers the first voltage to have a level corresponding to the second voltage, and supplies power based on the lowered first voltage to the operator, based on power consumption of the operator lower than or equal to a predetermined value.

公开(公告)号：US20210329760A1

公开(公告)日：2021-10-21

申请号：US17274349

申请日：2019-08-14

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Moonyoung KIM ,  Jeongil KANG ,  Shinwook CHOI

IPC: H05B45/325 ,  H05B45/3725 ,  H05B45/14

Abstract: Disclosed is an LED driving apparatus. The LED driving apparatus comprises an LED driving circuit, a power supply unit for supplying a driving voltage to the LED driving circuit, a voltage ripple controller located between the LED driving circuit and the power supply unit, and a switching unit for controlling a voltage supplied to the LED driving circuit by turning on or off the voltage ripple controller according to a duty ratio of a pulse width modulation (PWM) dimming signal.

公开(公告)号：US20210305844A1

公开(公告)日：2021-09-30

申请号：US17259351

申请日：2019-07-31

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Shinwook CHOI ,  Jeongil KANG ,  Moonyoung KIM

IPC: H02J50/12 ,  H02J50/00 ,  H02J50/80 ,  H02J7/02 ,  H04B5/00

Abstract: A wireless power reception device is disclosed. The wireless power reception device comprises: a reception coil which receives power from a wireless power transmission device; a rectifier which rectifies the received power; an output terminal which outputs the rectified power to an external electronic device; a first switch which is provided between the rectifier and the output terminal; and a controller which identifies the intensity of the rectified power, turns on the first switch so as for the received power to be supplied to the output terminal if the intensity of the rectified power falls within a preset range, and turns off the first switch so as to block the supply of the rectified power to the output terminal if the intensity of the rectified power does not fall within the preset range.

公开(公告)号：US20200021183A1

公开(公告)日：2020-01-16

申请号：US16456263

申请日：2019-06-28

Applicant: Samsung Electronics Co., Ltd.

Inventor： Shinwook CHOI ,  Jeongil KANG ,  Moonyoung KIM

IPC: H02M1/32 ,  H02M7/21 ,  H02M7/04 ,  H02M1/42 ,  H01R24/60

Abstract: Disclosed is an electronic apparatus including a connector configured to connect the electronic device to an external apparatus; and a power circuit configured to supply power to the connected external apparatus, the power circuit including: a transformer configured to output an output voltage by varying a level of an input voltage; a switching unit comprising a switch configured to perform switching operation for the transformer; a controller configured to control the switching unit to match a level of the output voltage with the external apparatus; and an auxiliary power circuit including an auxiliary winding, and configured to supply power to the controller based on a voltage induced in the auxiliary winding by the output voltage and to decrease the number of turns of the auxiliary winding based on the output voltage having a level greater than or equal to a predetermined value.