公开(公告)号：US20240106330A1

公开(公告)日：2024-03-28

申请号：US18199067

申请日：2023-05-18

Applicant: Samsung Display Co., LTD.

Inventor： YANGUK NAM ,  SUNGCHUN PARK

IPC: H02M3/158 ,  G09G3/20

CPC classification number: H02M3/158 ,  G09G3/2096 ,  G09G2330/021 ,  G09G2330/028

Abstract: A power voltage generator includes: an input voltage providing part outputting input voltage based on a first signal; an inductor receiving the input voltage to generate an inductor current and connected to an outputting part; the outputting part generating an output voltage based on the inductor current and generating a feedback voltage; an output sensing part sensing the output voltage based on a second signal and generating an output sensing voltage; a peak voltage generator generating a peak voltage based on the input voltage, set data corresponding to an output set voltage, and ripple data corresponding to a ripple set voltage; a first comparing part generating a stop signal based on the output sensing and peak voltages; a second comparing part generating a start signal based on the set data and feedback voltage; and a switch controller generating the first and second signals based on the start and stop signals.

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.

公开(公告)号：US20230410743A1

公开(公告)日：2023-12-21

申请号：US18132264

申请日：2023-04-07

Applicant: Samsung Display Co., LTD.

Inventor： EUNRYEOL BAEK ,  SUNGCHUN PARK

IPC: G09G3/3233 ,  H02M3/156 ,  H02M1/00

CPC classification number: G09G3/3233 ,  H02M3/156 ,  H02M1/0009 ,  G09G2300/0842 ,  G09G2310/08 ,  G09G2330/028 ,  G09G2330/021

Abstract: A power supply unit includes: a first DC-DC converter that generates a first power supply voltage and a second DC-DC converter that generates a second power supply voltage. The second DC-DC converter includes an inductor, a mode selector that receives at least one signal including information on an inductance value of the inductor and generates an inductor selection driving signal based on the at least one signal, and a feedback loop that receives the inductor selection driving signal and changes a parameter value for generating a current flowing through the inductor based on the inductor selection driving signal.

公开(公告)号：US20230252926A1

公开(公告)日：2023-08-10

申请号：US17993966

申请日：2022-11-24

Applicant: Samsung Display Co., Ltd.

Inventor： JIN-TAEK HONG ,  SUNGCHUN PARK

IPC: G09G3/20 ,  H02M3/158 ,  H02M1/00 ,  H02H7/12 ,  H02H1/00

CPC classification number: G09G3/20 ,  H02M3/158 ,  H02M1/0009 ,  H02H7/12 ,  H02H1/0007 ,  G09G2330/021 ,  G09G2330/04

Abstract: A power management circuit is disclosed that includes a boost converter, a pass transistor, and an overcurrent detect circuit. The boost converter is configured to convert an input voltage into a first power supply voltage. The pass transistor is configured to transfer the first power supply voltage as a second power supply voltage after a predetermined time from a time point at which the first power supply voltage is activated. The overcurrent detect circuit is configured to perform an overcurrent detect operation by sensing a current flowing through the pass transistor. A display device is also disclosed that includes the power management circuit.

公开(公告)号：US20190371228A1

公开(公告)日：2019-12-05

申请号：US16540429

申请日：2019-08-14

Applicant: Samsung Display Co., Ltd.

Inventor： SUNGCHUN PARK

IPC: G09G3/30 ,  H02M1/36 ,  H02M3/158

Abstract: A DC-DC converter includes: a first converter including a pass transistor coupled between the first node and a first output, and a body diode connected in parallel to the pass transistor; a sensor coupled between both ends of the pass transistor and which detects a driving current; and a second converter which outputs a second power voltage lower than the first power voltage to a second output. The second converter includes a master inverting converter which outputs the second power voltage independently of the driving current, a slave inverting converter which outputs the second power voltage when the driving current is greater than a predetermined threshold or when the input power voltage is greater than a predetermined boosting voltage limit, and an inverting converter controller which controls operations of the master and slave inverting converters in first and second drive modes based on the driving current and the input power voltage.