公开(公告)号：US20230335060A1

公开(公告)日：2023-10-19

申请号：US18159269

申请日：2023-01-25

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： DAE-SIK LEE ,  KEUNOH KANG ,  SANGHYUN LEE

IPC: G09G3/3258

CPC classification number: G09G3/3258 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2300/0866 ,  G09G2320/0233 ,  G09G2320/0693 ,  G09G2330/10

Abstract: Disclosed is an electronic device, which includes a display panel, a data driving circuit, a scan driving circuit, a signal control circuit, and a power supply circuit that trims a first voltage and a second voltage based on a first control value generated based on the first voltage and the second voltage, and the power supply circuit includes a controller that generates the first control value, a sign determining circuit that determines a sign of the first control value based on the first voltage and the second voltage, a plurality of voltage generators that generate a trimming voltage of the first control value based on the first voltage and the second voltage, and a first memory that stores the first control value, and the first control value is a value for controlling the sign determining circuit and each of the plurality of voltage generators.

公开(公告)号：US20230343297A1

公开(公告)日：2023-10-26

申请号：US18099451

申请日：2023-01-20

Applicant: Samsung Display Co., Ltd.

Inventor： DAE-SIK LEE ,  SIDUK SUNG ,  SONGYI HAN

IPC: G09G3/3275

CPC classification number: G09G3/3275 ,  G09G2330/021 ,  G09G2310/027

Abstract: A display device includes a display panel which displays an image, and a control circuit board connected to the display panel. The control circuit board includes a controller which analyzes the image in real time and determines in real time a digital-type power voltage based on the image, and a voltage generator which generates an analog-type power voltage based on the digital-type power voltage received from the controller. The voltage generator includes a digital-analog converter which converts the digital-type power voltage into the analog-type power voltage and outputs the analog-type power voltage.

公开(公告)号：US20230282142A1

公开(公告)日：2023-09-07

申请号：US18082071

申请日：2022-12-15

Applicant: Samsung Display Co., Ltd.

Inventor： DAE-SIK LEE ,  KEUNOH KANG ,  SANGHYUN LEE

IPC: G09G3/00

CPC classification number: G09G3/006 ,  G09G3/3208

Abstract: A display device includes: a display panel including a plurality of pixels, which displays an image; a first circuit board connected to the display panel and which provides a first signal to the display panel; a second circuit board, which provides a second signal to the first circuit board, and a connection board, which electrically connects the first circuit board to the second circuit board and includes a connection portion connected to the first circuit board and the second circuit board. The second circuit board includes a connection detection circuit, which detects a connection status of the connection portion and generates a detection signal.

公开(公告)号：US20240290286A1

公开(公告)日：2024-08-29

申请号：US18659694

申请日：2024-05-09

Applicant: Samsung Display Co., Ltd.

Inventor： DAE-SIK LEE ,  SIDUK SUNG ,  SONGYI HAN

IPC: G09G3/3275

CPC classification number: G09G3/3275 ,  G09G2310/027 ,  G09G2330/021

Abstract: A display device includes a display panel which displays an image, and a control circuit board connected to the display panel. The control circuit board includes a controller which analyzes the image in real time and determines in real time a digital-type power voltage based on the image, and a voltage generator which generates an analog-type power voltage based on the digital-type power voltage received from the controller. The voltage generator includes a digital-analog converter which converts the digital-type power voltage into the analog-type power voltage and outputs the analog-type power voltage.

公开(公告)号：US20230419910A1

公开(公告)日：2023-12-28

申请号：US18086762

申请日：2022-12-22

Applicant: Samsung Display Co., Ltd.

Inventor： DAE-SIK LEE ,  SIDUK SUNG ,  SONGYI HAN

IPC: G09G3/3266

CPC classification number: G09G3/3266 ,  G09G2310/08 ,  G09G2310/0289 ,  G09G2330/12 ,  G09G2330/02

Abstract: A display device may include a timing controller which generates on-clock and off-clock signals, a level shifter which sequentially generates gate clock signals each having a rising edge and a falling edge respectively synchronized with a rising edge of the on-clock signal and a falling edge of the off-clock signal, the gate clock signals having a voltage corresponding to a gate driving voltage, a gate driver generating gate signals based on the gate clock signals, an over-current detector detecting an over-current by sensing a current of each of the gate clock signals at a time point when the falling edge of the on-clock signal is generated in an on-current detection mode, and generates a shutdown signal in response to the detected over-current, and a voltage generator providing the gate driving voltage to the level shifter and stops providing the gate driving voltage in response to the generated shutdown signal.

公开(公告)号：US20230186831A1

公开(公告)日：2023-06-15

申请号：US17869218

申请日：2022-07-20

Applicant: Samsung Display Co., Ltd.

Inventor： KIHYUN PYUN ,  SUNG-MO YANG ,  SEUNGHO PARK ,  DAE-SIK LEE

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2320/0271 ,  G09G2330/021 ,  G09G2300/0828

Abstract: A display device includes a display panel which displays an image based on input image data, a driving controller which generates a voltage control signal for adjusting a first power voltage applied to the display panel in an (N+M)-th frame based on a maximum grayscale value of the input image data of an N-th frame, where N is a positive integer, and M is a positive integer, and a power voltage generator which senses a power current applied to the display panel in the (N+M)-th frame, generates a second power voltage based on the voltage control signal, and controls a voltage level of the first power voltage based on the second power voltage and a current level of the power current.

公开(公告)号：US20190251888A1

公开(公告)日：2019-08-15

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

CPC classification number: G09G3/20 ,  G02F1/136286 ,  G09G3/3266 ,  G09G3/3677 ,  G09G2300/0426 ,  G09G2310/0243 ,  G09G2310/0267 ,  G09G2310/08 ,  H01L27/3276

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.

公开(公告)号：US20230368719A1

公开(公告)日：2023-11-16

申请号：US17979028

申请日：2022-11-02

Applicant: Samsung Display Co., Ltd.

Inventor： SANGHYUN LEE ,  DAE-SIK LEE ,  KEUNOH KANG ,  SIDUK SUNG ,  SONGYI HAN

IPC: G09G3/20

CPC classification number: G09G3/2011 ,  G09G2320/0673 ,  G09G2320/0276 ,  G09G2310/027

Abstract: A gamma voltage generator within a display device includes a plurality of gamma generation circuits that respectively generate a plurality of gamma voltages. At least one gamma generation circuit includes an input circuit configured to receive a first reference voltage and a second reference voltage, a reference voltage select circuit configured to select a reference voltage among the first reference voltage and the second reference voltage by comparing a gamma voltage generated by the at least one gamma generation circuit with the first reference voltage and the second reference voltage, a digital-to-analog conversion circuit configured to generate an analog voltage corresponding to a gamma code based on the reference voltage selected by the reference voltage select circuit, and an output circuit configured to output the gamma voltage based on the analog voltage.

公开(公告)号：US20230317013A1

公开(公告)日：2023-10-05

申请号：US18087902

申请日：2022-12-23

Applicant: Samsung Display Co., Ltd.

Inventor： SANGHYUN LEE ,  DAE-SIK LEE ,  KEUNOH KANG ,  SIDUK SUNG ,  SONGYI HAN

IPC: G09G3/3258

CPC classification number: G09G3/3258 ,  G09G2330/04

Abstract: A display device includes a display panel including a pixel circuit, a display panel driving circuit that drives the display panel, a voltage generating circuit that receives an input power supply voltage when the display device is powered on and generates display panel voltages and driving circuit voltages based on the input power supply voltage, and an over-current protecting circuit that monitors an over-current generated inside the display device and generates a shut-down request signal when the over-current is detected. The voltage generating circuit outputs an initialization voltage at a first time point corresponding to a time point at which the input power supply voltage is received. The display panel driving circuit outputs a scan clock signal at a second time point. The over-current protecting circuit performs a first over-current protecting operation in a power-on monitoring period set between the first time point and the second time point.

公开(公告)号：US20150187286A1

公开(公告)日：2015-07-02

申请号：US14452692

申请日：2014-08-06

Applicant: SAMSUNG DISPLAY CO., LTD,

Inventor： SEOK HWAN LEE ,  DAE-SIK LEE ,  HWAN WOONG LEE ,  SEUNG YOUNG CHOI

IPC: G09G3/34 ,  G06F3/14

CPC classification number: G06F3/1423 ,  G09G3/3406 ,  G09G3/342 ,  G09G2320/0233 ,  G09G2360/145

Abstract: A display device is provided. The display device includes a display panel, a backlight unit, and a luminance comparison unit. The backlight unit is configured to supply light to the display panel. The luminance comparison unit is configured to compare a measured luminance of the display panel with a reference luminance range. The backlight unit includes a light source unit, a DC-DC converter, and a driving current controller. The DC-DC converter is configured to supply a driving voltage to the light source unit, and the driving current controller is configured to control a driving current flowing to the light source unit based on the comparison result of the luminance comparison unit.

Abstract translation: 提供显示装置。 显示装置包括显示面板，背光单元和亮度比较单元。 背光单元被配置为向显示面板提供光。 亮度比较单元被配置为将显示面板的测量亮度与参考亮度范围进行比较。 背光单元包括光源单元，DC-DC转换器和驱动电流控制器。 DC-DC转换器被配置为向光源单元提供驱动电压，并且驱动电流控制器被配置为基于亮度比较单元的比较结果来控制流向光源单元的驱动电流。