公开(公告)号：US11942868B2

公开(公告)日：2024-03-26

申请号：US18153132

申请日：2023-01-11

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yoon Young Lee ,  Sung Chun Park

IPC: H02M3/158 ,  G09G3/3233 ,  H02M1/00 ,  H02M1/088 ,  H02M3/156 ,  H02M3/335

CPC classification number: H02M3/1584 ,  G09G3/3233 ,  H02M1/0009 ,  H02M1/088 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2320/0247 ,  G09G2330/021 ,  G09G2330/028 ,  H02M3/156 ,  H02M3/1586 ,  H02M3/33507

Abstract: A power provider includes: first, second, and third inductors; a first transistor connected to the second inductor; a second transistor connected to the third inductor; and a power integrated chip (IC) including input terminals connected to the first, second, and third inductors, and an output terminal connected to a power line. The power provider may supply the power voltage using the first inductor and the power IC when power current is less than a first reference value, supply the power voltage using the second inductor, the first transistor, and the power IC when the power current is greater than the first reference value and less than a second reference value, and supply the power voltage using the second and third inductors, the first and second transistors, and the power IC when the power current is greater than the second reference value.

公开(公告)号：US10672317B2

公开(公告)日：2020-06-02

申请号：US16257050

申请日：2019-01-24

Applicant: Samsung Display Co., Ltd.

Inventor： Yoon Young Lee ,  Sungchun Park

IPC: G09G3/20

Abstract: A display device includes: a display panel; a power management circuit configured to: perform a short detection operation with a first short detection condition during a start-up operation; supply first and second power supply voltages in the normal mode; and stop supplying the first and second power supply voltages in the low power mode; and a display driver configured to provide a first image signal in the normal mode and a second image signal for in the low power mode, the display driver comprising a power block configured to supply first and second standby power supply voltages in the low power mode, wherein, in a transition frame between the low power mode and the normal mode, the display driver provides the second image signal for the standby image to the display panel, and the power management circuit performs the short detection operation with a second short detection condition.

公开(公告)号：US11308835B2

公开(公告)日：2022-04-19

申请号：US16667208

申请日：2019-10-29

Applicant: Samsung Display Co., Ltd.

Inventor： Yoon Young Lee ,  Sung Chun Park

IPC: G09G3/20

Abstract: A display device includes a display panel to display an image, a data driver to supply a data signal to the display panel, and a power supply to supply a driving voltage to the display panel through a power supply line and to supply a data driving voltage to the data driver, in which the power supply is configured to detect a voltage of the power supply line during an initial driving period during which the data driving voltage is supplied to the data driver, to supply a ground voltage to the display panel when the voltage detected from the power supply line is different from a reference voltage, and to supply the driving voltage to the power supply line after the initial driving period.

公开(公告)号：US11087664B2

公开(公告)日：2021-08-10

申请号：US16895510

申请日：2020-06-08

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sung Chun Park ,  Yoon Young Lee

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

Abstract: A direct current-to-direct current (“DC-DC”) converter includes: a first converter which outputs a first power voltage in a normal mode or a power saving mode based on a inductor current generated therein, where the first converter operates in a first driving manner in the normal mode, and operates in a second driving manner in the power saving mode; a second converter which outputs a second power voltage based on a inductor current generated therein, where the second converter operates in a third driving manner in the power saving mode, and a magnitude of the second power voltage in the power saving mode is different from that in the normal mode; and a mode selector which supplies a mode control signal to the first and second converters, where the first and second converters are driven in the normal mode or the power saving mode based on the mode control signal.

公开(公告)号：US10972008B2

公开(公告)日：2021-04-06

申请号：US16444329

申请日：2019-06-18

Applicant: Samsung Display Co., Ltd.

Inventor： Yoon Young Lee

IPC: H02M3/158 ,  G09G3/3233 ,  H02M1/00

Abstract: A display device includes a display panel which displays an image in a normal mode or low power mode. A DC-DC converter supplies a source driving voltage to the data driver, and supplies a first power voltage to the power line of the display panel in the normal mode. The data driver supplies a first auxiliary power voltage to the power line of the display panel in the low power mode. The DC-DC converter gradually changes the voltage level of the first power voltage to a reference output voltage level over a first period when the display panel initially enters into the normal mode, and changes the voltage level of the first power voltage to the reference output voltage level over a second period shorter than the first period when the mode of the display panel is switched from the low power mode to the normal mode.

公开(公告)号：US12155306B2

公开(公告)日：2024-11-26

申请号：US18341472

申请日：2023-06-26

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yoon Young Lee

IPC: G09G3/30 ,  H02M1/00 ,  H02M3/158

Abstract: An embodiment of the present disclosure provides a voltage converter including: an inductor in which a first electrode thereof receives an input voltage and a second electrode thereof is connected to a first node; a first transistor in which a first electrode thereof is connected to the first node and a second electrode thereof is connected to a second node providing an output voltage; a second transistor in which a first electrode thereof is connected to the first node and a second electrode thereof is connected to a reference terminal; and a current sensor connected to the first node and the second node, wherein the current sensor includes: a third transistor in which a first electrode thereof is connected to the first node and a second electrode thereof is connected to a third node; and a current mirror circuit that mirrors currents flowing through the second node, the third node, and a sensing terminal.

公开(公告)号：US11620941B2

公开(公告)日：2023-04-04

申请号：US17012755

申请日：2020-09-04

Applicant: Samsung Display Co., Ltd.

Inventor： Yoon Young Lee ,  Sung Chun Park ,  Chang Seok Chae

IPC: G09G3/3208 ,  H02M3/158 ,  H02M1/084

Abstract: A DC-DC includes a sensor, a determiner, a reference voltage controller and an output voltage controller. The sensor is configured to sense an output voltage to generate a sensed signal. The determiner is electrically connected to the sensor and is configured to determine a difference between the sensed signal and a first protection level for generating a determiner output. The reference voltage controller is electrically connected to the determiner and is configured to generate a second reference voltage based on a first reference voltage and a value of the determiner output. The output voltage controller is electrically connected to the sensor and is configured to output the output voltage based on an input voltage, a feedback voltage of the output voltage, and the second reference voltage.

公开(公告)号：US11574566B2

公开(公告)日：2023-02-07

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：US11249532B2

公开(公告)日：2022-02-15

申请号：US17155061

申请日：2021-01-21

Applicant: Samsung Display Co., Ltd.

Inventor： Eun Ryeol Baek ,  Yoon Young Lee

IPC: G06F1/32 ,  G06F1/08 ,  G06F1/10 ,  G06F1/12 ,  G06F1/3206

Abstract: A display device includes: a display panel including scan lines, a first power line, a second power line, and pixels connected to the scan lines and the first and second power lines; a gate driver to sequentially provide scan signals to the scan lines based on a clock signal; and a power supply including transistors to convert an input power voltage into a first power voltage through a switching operation of the transistors and to supply the first power voltage to the first power line through a first output terminal. In response to an amount of current flowing through the pixels being less than a first reference current amount, the power supply is configured to change one or more of an off-duty of at least one of the transistors, a channel capacitance of at least one of the transistors, a switching frequency of at least one of the transistors, and a slew rate of at least one of control signals for the transistors.

公开(公告)号：US12277903B2

公开(公告)日：2025-04-15

申请号：US18198383

申请日：2023-05-17

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yoon Young Lee

IPC: G09G3/3233 ,  G09G3/20

Abstract: A display device including: a pixel unit including pixels for generating light in response to a first power and a second power; a power supply for supplying the first power to a first power line and the second power to a second power line; and a protection circuit for discharging a voltage of the first power line and the second power line when the pixels are in a turn-off state, and putting the first power line and the second power line in a high impedance state after a predetermined time.