公开(公告)号：US12243456B2

公开(公告)日：2025-03-04

申请号：US18059721

申请日：2022-11-29

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kihyun Pyun ,  Siduk Sung

IPC: G09G3/32 ,  G09G3/00 ,  G09G3/3283

Abstract: An organic light-emitting diode (OLED) display device includes a display panel including a plurality of pixels, the plurality of pixels being grouped into a plurality of pixel blocks, a nonvolatile memory configured to store previous accumulated block degradation information for the plurality of pixel blocks up to a previous driving period, a controller configured to calculate current block degradation information for the plurality of pixel blocks in a current driving period, to calculate current accumulated block degradation information for the plurality of pixel blocks up to the current driving period by adding the current block degradation information to the previous accumulated block degradation information in response to a power control signal indicating a power-off, and to determine whether a sensing operation for each of the plurality of pixel blocks is to be performed by comparing the current accumulated block degradation information for each of the plurality of pixel blocks with a sensing reference degradation amount, and a sensing circuit configured to selectively perform the sensing operation for each of the plurality of pixel blocks.

公开(公告)号：US12217677B2

公开(公告)日：2025-02-04

申请号：US18230668

申请日：2023-08-07

Applicant: Samsung Display Co., Ltd.

Inventor： Eunjin Choi ,  Geonhwi Park ,  Jang-Mi Lee ,  Kihyun Pyun

IPC: G09G3/3233 ,  G09G3/32

Abstract: A display device includes a display panel displaying an image based on output image data, a voltage curve controller generating a converted peak luminance, a converted full white luminance, a converted peak grayscale, and a converted full white grayscale from a reference peak luminance and a reference full white luminance based on a gain mode and a gain value, and generating converted voltage curves including a first converted voltage curve from a first reference voltage curve based on the converted peak grayscale and the converted full white grayscale, and a driving voltage controller generating a driving voltage from the converted voltage curves based on a load and a maximum grayscale value of input image data. A voltage of the first converted voltage curve with respect to a peak grayscale is equal to a voltage of the first reference voltage curve with respect to the converted peak grayscale.

公开(公告)号：US12020645B2

公开(公告)日：2024-06-25

申请号：US18075759

申请日：2022-12-06

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Sung-In Kang

IPC: G09G3/3233

CPC classification number: G09G3/3233 ,  G09G2300/0842 ,  G09G2330/021 ,  G09G2330/028 ,  G09G2360/16

Abstract: A display device includes a display panel including a plurality of pixels, a power supply which provides a driving voltage to the pixels, and a controller which outputs a first signal by comparing a sensing driving current generated by sensing driving currents flowing through the pixels with a limit current, outputs a second signal by comparing a load of previous frame data with a limit load, and outputs a driving voltage control signal for controlling the driving voltage to the power supply based on the first signal and the second signal.

公开(公告)号：US12020615B2

公开(公告)日：2024-06-25

申请号：US17569802

申请日：2022-01-06

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Kyoungho Lim

IPC: G09G3/20

CPC classification number: G09G3/20 ,  G09G2300/0857 ,  G09G2330/02 ,  G09G2330/045

Abstract: A display apparatus includes a display panel, a data driver, a driving controller and a power voltage generator. The display panel displays an image. The data driver outputs a data voltage to the display panel. The driving controller controls an operation of the data driver. The power voltage generator outputs a power voltage of the display panel. The data driver outputs a clock recovery signal representing whether a clock recovery operation is normal or abnormal to the driving controller. The driving controller generates an overcurrent signal representing an overcurrent based on the clock recovery signal and outputs the overcurrent signal to the power voltage generator.

公开(公告)号：US12014680B2

公开(公告)日：2024-06-18

申请号：US18111234

申请日：2023-02-17

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Hyunjoo Seo

IPC: G09G3/3225

CPC classification number: G09G3/3225 ,  G09G2300/0828 ,  G09G2320/0626 ,  G09G2330/028

Abstract: A display device includes a display panel which is driven in a mode selected from among a plurality of modes including different luminance values, a voltage generator which generates a driving voltage, a resistor connected to an output terminal, from which the driving voltage is output, a current sensing unit connected in parallel to the resistor, where the current sensing unit measures a voltage value across both ends of the resistor and calculates a driving current value using a resistance value of the resistor and a measured voltage value, and a maximum current calculating unit which calculates a maximum measured current value corresponding a the luminance value of a selected mode and outputs a selection signal corresponding to the maximum measured current value, and the current sensing unit sets a maximum measured voltage value corresponding to the maximum measured current value in response to the selection signal.

公开(公告)号：US11922849B2

公开(公告)日：2024-03-05

申请号：US18135273

申请日：2023-04-17

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kihyun Pyun ,  Heesook Park

IPC: G09G3/20

CPC classification number: G09G3/2007 ,  G09G2320/0223 ,  G09G2330/021 ,  G09G2330/028

Abstract: A display apparatus including: a display panel including a plurality of display blocks; and a display panel driver configured to generate a power voltage based on a maximum grayscale value of input image data and a position of a maximum load block among the display blocks and configured to output the power voltage to the display panel, wherein the maximum load block has a largest load of the input image data among the display blocks.

公开(公告)号：US11869419B2

公开(公告)日：2024-01-09

申请号：US18062863

申请日：2022-12-07

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kihyun Pyun ,  Jang-Hoon Kwak

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2310/08 ,  G09G2320/0233

Abstract: A display device includes a first source printed circuit board connected to a control printed circuit board through a cable, a second source printed circuit board connected to the first source printed circuit board through a flexible printed circuit board, a display panel connected to the first source printed circuit board and the second source printed circuit board through a connection part, and a timing controller determining predicted power currents based on input image data, determining a target gain based on the predicted power currents and a maximum allowable power current of the flexible printed circuit board, and correcting the input image data corresponding to a gain reduction region of the display panel based on the target gain. Accordingly, the display device may reduce a power current flowing through the flexible printed circuit board and may include a flexible printed circuit board including a small number of pins.

公开(公告)号：US11854499B2

公开(公告)日：2023-12-26

申请号：US18088715

申请日：2022-12-26

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Kyoungho Lim

IPC: G09G3/3291 ,  G09G3/32 ,  G09G3/36

CPC classification number: G09G3/3291 ,  G09G3/32 ,  G09G3/3688 ,  G09G2310/027 ,  G09G2320/0276 ,  G09G2320/0673 ,  G09G2360/16

Abstract: A display device is disclosed that includes a display panel, a controller, and a data driver. The controller is configured to determine first luminances with respect to a reference grayscale in a second frame when the reference grayscale is displayed in the second frame after the reference grayscale is displayed in a first frame. The controller is configured to determine second luminances with respect to the reference grayscale in the second frame when the reference grayscale is displayed in the second frame after a minimum grayscale is displayed in the first frame. The controller is further configured to temporally and spatially arrange first data corresponding to the reference grayscale and second data corresponding to the minimum grayscale to generate a data signal. And, the controller is configured to drive the display panel with a digital driving method in a first grayscale section, and drive the display panel with an analog driving method in a second grayscale section. The data driver is configured to generate a data voltage based on the data signal.

公开(公告)号：US11847981B2

公开(公告)日：2023-12-19

申请号：US18149443

申请日：2023-01-03

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Moonshik Kang ,  Dae-Sik Lee ,  Jun Pyo Lee ,  Min-Soo Choi ,  Songyi Han

IPC: G09G3/34 ,  H05B45/14

CPC classification number: G09G3/3406 ,  H05B45/14 ,  G09G2330/023 ,  G09G2360/145

Abstract: A light source apparatus includes a plurality of light source gate lines extending in a first direction, a plurality of light source data lines extending in a second direction crossing the first direction, a plurality of light source emission lines, a plurality of feedback lines and a plurality of light source blocks. At least one of the light source blocks is connected to the light source gate line, the light source data line, the light source emission line and the feedback line.

公开(公告)号：US20230368724A1

公开(公告)日：2023-11-16

申请号：US18083296

申请日：2022-12-16

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Jang-Mi Lee

IPC: G09G3/20

CPC classification number: G09G3/2096 ,  G09G2310/08 ,  G09G2330/028 ,  G09G2360/12

Abstract: A display device is disclosed that includes a display panel, a data driver, a timing controller, a memory device, and a power voltage generator. The display panel includes pixels. The data driver is configured to apply data voltages to the pixels. The timing controller is configured to control the data driver, to generate a test strobe signal by shifting a phase of a strobe signal, to perform a test write operation and a test read operation with the memory device based on the test strobe signal, and to increase a power voltage when an error bit occurs in the test write operation and the test read operation. The memory device is configured to sample memory data received from the timing controller using the strobe signal and to store sampled memory data. The power voltage generator is configured to apply the power voltage to the memory device.