公开(公告)号：US20250030344A1

公开(公告)日：2025-01-23

申请号：US18762847

申请日：2024-07-03

Applicant: Samsung Display Co., LTD.

Inventor： SUNGCHUN PARK ,  JEONGMIN SEO ,  YOON YOUNG LEE

IPC: H02M3/158 ,  G09G3/20 ,  H02M1/32

Abstract: A DC-DC converter includes: a master converter configured to operate to generate a panel power voltage based on an input voltage regardless of a panel current, and a slave converter configured to operate to generate the panel power voltage with the master converter based on the input voltage when the panel current is greater than a reference current. The master converter and the slave converter are connected to a first inductor.

公开(公告)号：US20240296790A1

公开(公告)日：2024-09-05

申请号：US18369842

申请日：2023-09-19

Applicant: Samsung Display Co., Ltd.

Inventor： JEONGMIN SEO ,  SUNGCHUN PARK

IPC: G09G3/3208 ,  H02H1/00 ,  H02H7/20 ,  H02M3/158

CPC classification number: G09G3/3208 ,  H02H1/0007 ,  H02H7/20 ,  H02M3/158 ,  G09G2310/08 ,  G09G2330/02 ,  G09G2330/04

Abstract: Disclosed is a display device which includes a voltage generator including a first converter that generates a first voltage using an input voltage and is shut down in response to a shutdown signal and a short circuit protection part including a first short circuit protection part that compares an output voltage of an output terminal of the first converter with a first reference voltage and outputs the shutdown signal. The first converter pre-charges the output voltage to a predetermined voltage level during a first period, maintains a level of the output voltage during a second period subsequent to the first period, and boosts and outputs the output voltage as the first voltage during a third period subsequent to the second period. The first short circuit protection part outputs the shutdown signal when the output voltage in the second period has a level lower than that of the first reference voltage.

公开(公告)号：US20240305195A1

公开(公告)日：2024-09-12

申请号：US18388834

申请日：2023-11-11

Applicant: Samsung Display Co., LTD.

Inventor： JEONGMIN SEO ,  SUNGCHUN PARK

IPC: H02M3/158 ,  G09G3/20 ,  H02M1/00 ,  H02M1/32

CPC classification number: H02M3/158 ,  G09G3/20 ,  H02M1/0032 ,  H02M1/32 ,  G09G2330/021 ,  G09G2330/028

Abstract: A direct current to direct current converter includes a switcher which generates an output voltage based on an external input voltage, and a controller which controls the switcher based on a pulse width modulation signal. The controller counts the number of switching of the pulse width modulation signal in a pulse skip mode of a low-power mode, generate a count value, and determines a short circuit defect when the count value is equal to or greater than a reference count value.