公开(公告)号：US20220338319A1

公开(公告)日：2022-10-20

申请号：US17575281

申请日：2022-01-13

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Junhyun WON ,  Jiwon LEE ,  Sungyong JOO ,  Taejun YOU

IPC: H05B45/10 ,  H01L27/15 ,  H05B45/30

Abstract: An electronic apparatus is provided. The electronic apparatus includes: a plurality of LED arrays disposed in parallel, a first sensing inductor connected to a first LED array of the plurality of LED arrays in series, a first auxiliary inductor disposed adjacent to the first sensing inductor, a second sensing inductor connected to a second LED array of the plurality of LED arrays in series, a second auxiliary inductor disposed adjacent to the second sensing inductor, a variable resistance connected to the plurality of LED arrays and configured to adjust an amount of a current flowing to the plurality of LED arrays according to a resistance value, and an LED driver configured to, based on at least one of a first induced voltage generated on the first auxiliary inductor or a second induced voltage generated in the second auxiliary inductor being a threshold voltage or more, identify that an error occurs in at least one of the first LED array or the second LED array, and adjust the resistance value of the variable resistance based on the identified result.

公开(公告)号：US20240266950A1

公开(公告)日：2024-08-08

申请号：US18625977

申请日：2024-04-03

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jiwon LEE ,  Sungyong JOO ,  Junhyun WON ,  Taejun YOU

IPC: H02M1/42 ,  H02M1/00

CPC classification number: H02M1/4208 ,  H02M1/0035

Abstract: An electronic apparatus includes a power factor correction (PFC) circuit including an inductor and a switch serially connected to the inductor, and a control circuit. The control circuit, based on an amount of current flowing in the PFC circuit being less than or equal to a threshold current, operates the PFC circuit in a standby mode, and based on an output voltage of the PFC circuit being less than a threshold output voltage corresponding to the standby mode, adjusts the output voltage to correspond to a reference voltage by applying a signal for on-off control of the switch in the PFC circuit to the switch. The control circuit identifies an on-off frequency of the switch based on a reference current level for limiting a peak current of the inductor included in the PFC circuit in the standby mode, and applies the signal to the switch based on the on-off frequency.

公开(公告)号：US20220386481A1

公开(公告)日：2022-12-01

申请号：US17687962

申请日：2022-03-07

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Jiwon LEE ,  Sungyong JOO ,  Junhyun WON ,  Taejun YOU

IPC: H05K5/00 ,  H05K1/18 ,  H05K5/02

Abstract: Provided is a display apparatus. The display apparatus includes: a display panel; a chassis supporting the display panel; a printed circuit board on which an electronic component is mounted; and a supporter inserted in the printed circuit board, wherein the printed circuit board includes a first surface facing the chassis, a second surface facing a direction opposite to the first surface, and a through hole penetrating the first surface and the second surface. The supporter includes: a head fixed on the second surface of the printed circuit board; a first body positioned inside the through hole, and extending from the head toward the chassis; and a second body extending from the first body, and protruding from the through hole toward the chassis.