公开(公告)号：US20210057989A1

公开(公告)日：2021-02-25

申请号：US16997475

申请日：2020-08-19

Applicant: Samsung Electronics Co., Ltd. ,  Kookmin University Industry Academy Cooperation Foundation

Inventor： Duhee JANG ,  Sangkyoo HAN ,  Jeongil KANG ,  Kasan HA ,  Sanghoon LEE

IPC: H02M1/42 ,  H02M3/335 ,  H02M1/08 ,  H04N5/63

Abstract: Disclosed are a display apparatus and an electronic apparatus, the display apparatus including: a main body including a display and a connector; and an adapter connectable to the main body and configured to supply power to the connected main body, the adapter including: a transformer configured to boost an input first alternating current (AC) voltage, a switch including a switching device configured to switch a current flowing in the transformer, a controller configured to control the switching device to output a second AC voltage boosted by the transformer, and the main body including a power factor correction (PFC) converter configured to correct a power factor of the second AC voltage output from the adapter and output a direct current (DC) voltage.

公开(公告)号：US20210119437A1

公开(公告)日：2021-04-22

申请号：US17060194

申请日：2020-10-01

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Duhee JANG ,  Jeongil KANG ,  Kasan HA

IPC: H02H3/22 ,  H01F27/34 ,  H02H9/04

Abstract: An electronic apparatus is provided. The electronic apparatus includes: a main circuit; and a power supply circuit configured to receive external power from an external power supply and supply operating power to the main circuit. The power supply circuit includes: a converter; and a lightning protection circuit that includes: a varistor configured to have a first rated voltage corresponding to a breakdown voltage of a device of the converter; and a surge arrester connected in series to the varistor and configured to have a second rated voltage, and based on the external power being higher than the first rated voltage of the varistor, the varistor is clamped so that a voltage applied to the converter does not exceed the first rated voltage, and based on a voltage applied to the surge arrester being equal to or higher than the second rated voltage, the surge arrester is short-circuited.

公开(公告)号：US20220158548A1

公开(公告)日：2022-05-19

申请号：US17588601

申请日：2022-01-31

Applicant: SAMSUNG ELECTRONICS CO., LTD. ,  KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATION

Inventor： Duhee JANG ,  Sangkyoo HAN ,  Jeongil KANG ,  Hyosoon CHOI ,  Kasan HA

IPC: H02M1/42 ,  G09G3/20 ,  H02M3/335

Abstract: Disclosed is a display apparatus including: a display; a transformer configured to boost an input alternating current (AC) first voltage and output a second voltage; a switch configured to allow an electric current to flow or stop in the transformer based on a control signal; a power factor correction (PFC) converter configured to correct a power factor of the output second voltage, and output a direct current (DC) third voltage to the display; and a controller configured to modulate a frequency of the control signal so that the second voltage has a target level, and increase or decrease the frequency of the control signal within a specified range to synchronize with an AC period of the first voltage.