公开(公告)号：US11250757B2

公开(公告)日：2022-02-15

申请号：US17154943

申请日：2021-01-21

Applicant: Samsung Display Co., Ltd.

Inventor： Yanguk Nam

IPC: G09G3/20

Abstract: A display device includes a display panel, a display panel driving circuit, and a power management integrated circuit that generates driving voltages, receives driving set data from a timing controller, stores driving hex values corresponding to the driving set data in first internal registers, and determines voltage levels of the driving voltages based on the driving hex values. The power management integrated circuit divides the driving hex values into upper and lower decimal values, derives a result decimal value by applying the upper and lower decimal values to a first authentication-formula, generates a result hex value based on the result decimal value, compares an authentication hex value corresponding to authentication data received from the timing controller with the result hex value, and selectively operates in a normal mode or in a protection mode based on a comparison result between the authentication hex value and the result hex value.

公开(公告)号：US11210977B2

公开(公告)日：2021-12-28

申请号：US16797198

申请日：2020-02-21

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yanguk Nam

IPC: G09G3/00 ,  G09G3/20

Abstract: Systems and methods are described for preventing damage from overcurrent flows in a display device. The display device may include a display panel, a display panel driving circuit, and a driving control circuit. The display device also includes, a power management integrated circuit and a display panel protection circuit. If an overcurrent condition is detected, the display panel protection circuit may periodically mask frames from being sent to the display panel to prevent damage.

公开(公告)号：US11114056B2

公开(公告)日：2021-09-07

申请号：US16388231

申请日：2019-04-18

Applicant: Samsung Display Co., Ltd.

Inventor： Yanguk Nam ,  Dae-Sik Lee ,  Taegon Im

IPC: G09G5/00

Abstract: A display apparatus includes a display panel, a data driver, a power voltage generator, a driving controller and a timing compensator. The display panel displays an image based on input image data. The data driver outputs a data voltage to the display panel. The power voltage generator outputs a data power voltage to the data driver. The driving controller controls a driving timing of the data driver. The timing compensator changes an output timing of the data voltage of the data driver when a feedback data power voltage is less than a reference data power voltage at a start point of an active period.

公开(公告)号：US10650724B2

公开(公告)日：2020-05-12

申请号：US16293334

申请日：2019-03-05

Applicant: Samsung Display Co., Ltd.

Inventor： Sujin Kim ,  Jongjae Lee ,  Yanguk Nam ,  Dae-sik Lee

IPC: G09G3/20

Abstract: A display device includes: a first data driving chip including: a first data driving circuit to generate a first data signal; and a first sensor to sense a first overcurrent flowing in the first data driving circuit based on a first power current flowing in the first data driving circuit to generate a first signal; a second data driving chip including: a second data driving circuit to generate a second data signal; and a second sensor to sense a second overcurrent flowing in the second data driving circuit based on a second power current flowing in the second data driving circuit to generate a second signal; and a power controller to control first and second powers respectively supplied to the first and second data driving chips, and to block at least one of the first and second powers based on at least one of the first and second signals.

公开(公告)号：US20190197940A1

公开(公告)日：2019-06-27

申请号：US16293334

申请日：2019-03-05

Applicant: Samsung Display Co., Ltd.

Inventor： Sujin Kim ,  Jongjae Lee ,  Yanguk Nam ,  Dae-sik Lee

IPC: G09G3/20

CPC classification number: G09G3/2092 ,  G09G3/20 ,  G09G2300/0426 ,  G09G2330/02 ,  G09G2330/028

Abstract: A display device includes: a first data driving chip including: a first data driving circuit to generate a first data signal; and a first sensor to sense a first overcurrent flowing in the first data driving circuit based on a first power current flowing in the first data driving circuit to generate a first signal; a second data driving chip including: a second data driving circuit to generate a second data signal; and a second sensor to sense a second overcurrent flowing in the second data driving circuit based on a second power current flowing in the second data driving circuit to generate a second signal; and a power controller to control first and second powers respectively supplied to the first and second data driving chips, and to block at least one of the first and second powers based on at least one of the first and second signals.

公开(公告)号：US11962241B1

公开(公告)日：2024-04-16

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：US11694632B2

公开(公告)日：2023-07-04

申请号：US17173528

申请日：2021-02-11

Applicant: Samsung Display Co., Ltd.

Inventor： Yanguk Nam ,  Hyungrae Nam

IPC: G09G3/3291

CPC classification number: G09G3/3291 ,  G09G2310/0291 ,  G09G2330/028

Abstract: A power voltage generator includes a charge pump and a regulator. The charge pump generates a charge pumping voltage. The charge pumping voltage has a headroom margin which is automatically set. The charge pumping voltage is varied based on a target voltage. The regulator generates a power voltage based on the charge pumping voltage.

公开(公告)号：US11087691B2

公开(公告)日：2021-08-10

申请号：US16720370

申请日：2019-12-19

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yanguk Nam ,  Dae-sik Lee ,  Yoomi Kim ,  Junghwan Hwang

IPC: G09G3/3258 ,  G09G3/3233 ,  H01L27/32 ,  G09G3/36

Abstract: A display device includes: a display panel including data lines, gate lines, and pixels, the display panel is operated in an active period or in a blank period; and a driving circuit for driving the display panel, the driving circuit including: a signal controller for outputting clock control signals; a voltage generator for receiving the clock control signals, wherein the voltage generator outputs active clock signals synchronized with the clock control signals during the active period and outputs blank clock signals during the blank period; and an overcurrent detection circuit for receiving the clock control signals and the blank clock signals, the overcurrent detection circuit detects an overcurrent of the blank clock signals, and a phase difference between the clock control signals in the active period is different from a phase difference between the clock control signals in the blank period.

公开(公告)号：US10957277B2

公开(公告)日：2021-03-23

申请号：US16376922

申请日：2019-04-05

Applicant: Samsung Display Co., Ltd.

Inventor： Dae-Sik Lee ,  Yanguk Nam ,  Songyi Han

IPC: G09G5/00

Abstract: A power voltage generating circuit includes an input capacitor including a first end connected to an input node, and a second end connected to a ground, an inductor, an input switching element connected between the input node and a first end of the inductor, a control switching element including a control electrode connected to a switching controller configured to apply a switching control signal, an input electrode connected to a resistor, and an output electrode connected to a second end of the inductor, a diode including a first electrode connected to the second end of the inductor, and a second electrode connected to an output node, and an output capacitor connected between the output node and the ground, wherein the input switching element is configured to be turned off when a short circuit of a load connected to the output node is detected in a monitoring period.

公开(公告)号：US10916167B2

公开(公告)日：2021-02-09

申请号：US16248112

申请日：2019-01-15

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Dae-Sik Lee ,  Yanguk Nam ,  Yoomi Kim

IPC: G09G3/20 ,  G09G3/36 ,  G02F1/1362 ,  H01L27/32 ,  G09G3/3266

Abstract: A gate driving device of a display device may include a voltage generator, a gate controller and a gate driver. The voltage generator may generate a gate driving voltage that varies between a gate-on voltage and a gate-off voltage. The gate controller may generate gate clock signals based on the gate driving voltage and gate control signals. The gate driver may generate a gate signal based on the gate clock signals. The gate control signals may include a first control signal and clock control signals, each varying between a high level and a low level. The gate controller may output the gate clock signals having a voltage level of the gate-off voltage when the first control signal and the clock control signals are each provided to the gate controller at the low level, thereby avoiding a display defect due to voltage ramping that may otherwise occur.