公开(公告)号：US20210248940A1

公开(公告)日：2021-08-12

申请号：US17147987

申请日：2021-01-13

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： YOON YOUNG LEE

IPC: G09G3/00

Abstract: A power voltage generator includes a first sensor, a second sensor, a comparator and a shutdown controller. The first sensor is configured to sense a first power voltage output node that outputs a first power voltage. The second sensor is configured to sense a second power voltage output node that outputs a second power voltage. The comparator is configured to compare a first sensing signal of the first sensor with a second sensing signal of the second sensor. The shutdown controller is configured to shut down the power voltage generator based on a comparison signal from the comparator.

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：US20240249669A1

公开(公告)日：2024-07-25

申请号：US18545165

申请日：2023-12-19

Applicant: Samsung Display Co., LTD.

Inventor： YOON YOUNG LEE ,  SUNGCHUN PARK

IPC: G09G3/32 ,  G09G3/3291

CPC classification number: G09G3/32 ,  G09G3/3291 ,  G09G2310/0275 ,  G09G2330/021 ,  G09G2330/028 ,  G09G2330/04

Abstract: A power manager includes a first driving voltage generator which supplies a first driving voltage to a first power line and a second driving voltage generator which supplies a second driving voltage to a second power line, where a voltage level of the second driving voltage is lower than a voltage level of the first driving voltage. During an initial driving period in which the first driving voltage is supplied to the first power line and before the second driving voltage is supplied to the second power line, the second driving voltage generator senses a voltage of the second power line, and a supply of the first driving voltage is controlled based on the voltage of the second power line.

公开(公告)号：US20240071304A1

公开(公告)日：2024-02-29

申请号：US18132785

申请日：2023-04-10

Applicant: Samsung Display Co., Ltd.

Inventor： YOON YOUNG LEE ,  SUNGCHUN PARK

IPC: G09G3/3233 ,  H02M3/145

CPC classification number: G09G3/3233 ,  H02M3/145 ,  G09G2330/028

Abstract: A DC-DC converter includes a first switching element, a second switching element, a first amplifier, a second amplifier, a Pulse Width Modulation (PWM) controller, an output inductor and a power compensator. The second switching element is connected to the first switching element. The first amplifier outputs a first switching control signal to control the first switching element. The second amplifier outputs a second switching control signal to control the second switching element. The PWM controller generates a control signal applied to input terminals of the first amplifier and the second amplifier. The output inductor includes a first terminal connected to the first switching element and the second switching element and a second terminal outputting the pixel power supply voltage. The power compensator receives an input voltage and adjusts a power supply voltage applied to a power supply terminal of the first amplifier.