公开(公告)号：US09431903B2

公开(公告)日：2016-08-30

申请号：US14614012

申请日：2015-02-04

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Soon-Gi Kwon ,  Sung-Cheon Park

IPC: G09G3/32 ,  H02M3/156 ,  H02M3/158 ,  G05F1/24 ,  H02M1/00

CPC classification number: H02M3/156 ,  G05F1/24 ,  G09G3/3233 ,  G09G3/3258 ,  G09G2310/0264 ,  G09G2310/0278 ,  G09G2320/0233 ,  G09G2320/04 ,  G09G2330/00 ,  G09G2330/08 ,  G09G2330/12 ,  H02M3/158 ,  H02M2001/0025

Abstract: A DC-DC converter includes a first power source generator, the first power source generator including an input port and a first output port, the first power source generator being configured to receive an input power source to the input port, and being configured to generate a first power source, the first power source being output to the first output port, and a selecting unit, the selecting unit being configured to selectively transmit, to the first power source generator, one of: a feedback voltage, the feedback voltage being input from an external feedback wiring line via a feedback terminal, and a voltage of the first output port.

公开(公告)号：US10325548B2

公开(公告)日：2019-06-18

申请号：US15427584

申请日：2017-02-08

Applicant: Samsung Display Co., Ltd.

Inventor： Soon-Gi Kwon ,  Sung-Chun Park

IPC: G09G3/20 ,  H02M1/15 ,  H02M3/158 ,  H02M1/00

Abstract: A power converter may include the following elements: an input terminal for receiving an input voltage; an output terminal for providing an output voltage; a reference member for receiving a reference voltage; a first transistor electrically connected between the reference member and the input terminal; a second transistor electrically connected between the input terminal and the output terminal; a diode electrically connected in parallel with the second transistor; and a controller for selecting a first mode if the input voltage is greater than a first reference voltage level and for selecting a second mode if the input voltage has been less than a second reference voltage level for a reference time period. The first transistor and the diode may generate the output voltage in the first mode. The first transistor and the second transistor may generate the output voltage in the second mode.

公开(公告)号：US12165553B2

公开(公告)日：2024-12-10

申请号：US18095097

申请日：2023-01-10

Applicant: Samsung Display Co., LTD.

Inventor： Hai-Jung In ,  Chulkyu Kang ,  Kimyeong Eom ,  Soon-Gi Kwon ,  Min Jeong Kim

IPC: G09G3/20

Abstract: A gate driver includes: a pull-up circuit configured to pull up a gate output signal to a high voltage in response to a signal at a first node of the pull-up circuit; a first pull-down circuit configured to pull down the gate output signal to a low voltage in response to a signal at a second node of the first pull-down circuit; a second pull-down circuit configured to pull down the gate output signal to the low voltage in response to a signal at a third node of the second pull-down circuit; a first selection circuit configured to activate the first pull-down circuit and deactivate the second pull-down circuit based on a first selection signal; and a second selection circuit configured to activate the second pull-down circuit and deactivate the first pull-down circuit based on a second selection signal.

公开(公告)号：US10310589B2

公开(公告)日：2019-06-04

申请号：US15408015

申请日：2017-01-17

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Soon-Gi Kwon ,  Sung-Cheon Park

IPC: G06F9/00 ,  G06F1/3287 ,  G06F1/30 ,  H02M1/32 ,  H02M3/158 ,  G09G3/20 ,  G06F1/3234 ,  G06F1/3296 ,  H02M1/00

Abstract: A power controller includes an inductor coupled to an input terminal to which an input voltage is input, a first switch coupled between the inductor and a first power source voltage output terminal, a second switch coupled between the inductor and a ground, a switch controller controlling a voltage output to the first power source voltage output terminal by controlling duties of the first and second switches according to a feedback voltage input to a feedback terminal corresponding to a voltage output to the first power source voltage output terminal, and a diode coupled between the first power source voltage output terminal and the feedback terminal, and preventing a voltage of the first power source voltage output terminal from increasing higher than a breakdown voltage of the first and second switches.

公开(公告)号：US09754523B2

公开(公告)日：2017-09-05

申请号：US14698119

申请日：2015-04-28

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yoon-Young Lee ,  Kwang-Hun Kang ,  Soon-Gi Kwon ,  Sung-Chun Park ,  Jeong-Min Seo

IPC: G09G3/20

CPC classification number: G09G3/20 ,  G09G2330/028

Abstract: A power supply device includes a voltage range selector, a voltage level controller, and a power supply voltage generator. The voltage range selector generates a range selection signal to select a voltage control range. The voltage level controller generates a voltage level control signal based on a driving condition of a display panel. The power supply voltage generator generates a power supply voltage having a voltage level corresponding to the voltage level control signal within the voltage control range, and supplies the power supply voltage to the display panel.