公开(公告)号：US20230110937A1

公开(公告)日：2023-04-13

申请号：US18059721

申请日：2022-11-29

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Siduk Sung

IPC: 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：US11605338B2

公开(公告)日：2023-03-14

申请号：US17233260

申请日：2021-04-16

Applicant: Samsung Display Co., Ltd.

Inventor： Eunjin Choi ,  Wonjin Seo ,  Kihyun Pyun

IPC: G09G3/3208

Abstract: A driving controller includes: a logo determiner configured to determine whether or not input image data includes a logo; a logo grayscale value calculator configured to calculate a logo grayscale value of a logo area corresponding to the logo in response to the input image data including the logo; a light emitting element life expectancy determiner configured to determine a life expectancy of a light emitting element corresponding to the logo area; a compensation reference grayscale value generator configured to determine a compensation reference grayscale value according to the life expectancy of the light emitting element corresponding to the logo area; and a logo luminance compensator configured to compare the logo grayscale value to the compensation reference grayscale value to determine whether or not to compensate a luminance of the logo area.

公开(公告)号：US11605331B2

公开(公告)日：2023-03-14

申请号：US17556163

申请日：2021-12-20

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Sung-Mo Yang

IPC: G09G3/20

Abstract: A display device may include a display panel which displays an image based on a data voltage, a driving controller including a net power control setter which determines a scale factor for adjusting a gray scale of (N+1)th frame data based on a load of Nth frame data and a net power control reference value, where the driving controller generates a data signal based on input image data, and N is a natural number greater than or equal to 2, a data driver which converts the data signal into the data voltage and outputs the data voltage to the display panel, and a power supply voltage generator which senses a power supply current applied to the display panel in an Nth frame and generates a power supply voltage based on a current level of the power supply current.

公开(公告)号：US11551593B2

公开(公告)日：2023-01-10

申请号：US17211370

申请日：2021-03-24

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kihyun Pyun ,  Siduk Sung

IPC: 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：US11545063B2

公开(公告)日：2023-01-03

申请号：US17388808

申请日：2021-07-29

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kihyun Pyun ,  Heesook Park

IPC: G09G3/30 ,  G09G3/36 ,  G09G3/20

Abstract: A data transmission circuit includes a transmitter configured to transmit a data signal, a receiver configured to receive the data signal, a first transmission line connected between the transmitter and the receiver, and a second transmission line connected between the transmitter and the receiver. The data signal includes a line start signal, and a configuration signal. The data signal further includes at least one of an inverted line start signal which is an inverted version of the line start signal or an inverted configuration signal which is an inverted version of the configuration signal.

公开(公告)号：US11482152B2

公开(公告)日：2022-10-25

申请号：US16728756

申请日：2019-12-27

Applicant: Samsung Display Co., Ltd.

Inventor： Gwangsoo Ahn ,  Keunoh Kang ,  Kihyun Pyun ,  Moonshik Kang

IPC: G09G3/20

Abstract: A display system includes a source device and a sink device. The source device generates red-color display data, green-color display data, and blue-color display data and transmits first packet data including the red-color display data and a red-color display reference gamma-set, second packet data including the green-color display data and a green-color display reference gamma-set, and third packet data including the blue-color display data and a blue-color display reference gamma-set. The sink device converts the red-color display data, the green-color display data, and the blue-color display data into red-color display data-voltages, green-color display data-voltages, and blue-color display data-voltages and displays an image using the red-color display data-voltages, the green-color display data-voltages, and the blue-color display data-voltages. The sink device generates red-color display gamma-voltages, green-color display gamma-voltages, and blue-color display gamma-voltages based on the red-color display reference gamma-set, the green-color display reference gamma-set, and the blue-color display reference gamma-set, respectively.

公开(公告)号：US11423822B2

公开(公告)日：2022-08-23

申请号：US17445941

申请日：2021-08-25

Applicant: Samsung Display Co., Ltd.

Inventor： Heesook Park ,  Kihyun Pyun

IPC: G09G3/20

Abstract: An embodiment of a display apparatus includes a display panel, a driving controller, and a data driver. In operation the driving controller determines a gain reducing area based on an edge load of input image data corresponding to an edge area of the display panel and compensates a grayscale value of the input image data corresponding to the gain reducing area to generate a data signal. The data driver converts the data signal to a data voltage and outputs the data voltage to the display panel.

公开(公告)号：US11380242B2

公开(公告)日：2022-07-05

申请号：US16705114

申请日：2019-12-05

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Yunmi Kim ,  Ji Woong Choi

IPC: G09G3/20 ,  G06F1/04 ,  G06N20/00

Abstract: A display device includes a controller to generate a start frame control signal having a first level in an active period and a second level in a blank period, a load signal toggling between the first level and the second level in the active period and having the second level in the blank period, and a data signal including image data in the active period and a training pattern in the blank period, and a data driver to recover the image data from the data signal based on an internal clock signal to provide display pixels with data voltages in the active period, and to perform a training operation for the internal clock signal using the training pattern in the data signal when both of the start frame control signal and the load signal are maintained as the second level for more than a reference time in the blank period.

公开(公告)号：US11158269B2

公开(公告)日：2021-10-26

申请号：US16582454

申请日：2019-09-25

Applicant: Samsung Display Co., Ltd.

Inventor： Gwangsoo Ahn ,  Kihyun Pyun ,  Moonshik Kang

IPC: G09G3/34

Abstract: A display device includes a light-source module including a plurality of light-source blocks configured to provide light to a display panel, a plurality of light-source drivers configured to drive the plurality of light-source blocks, a timing controller configured to generate a dimming level signal of a corresponding one of the light-source blocks, and to generate a dimming select signal configured to select a corresponding one of the light-source drivers corresponding to the dimming level signal, a signal converter configured to convert an n-bit dimming select signal into an m-bit switch control signal, “n” and “m” being natural numbers, and n being less than m, and a plurality of switches connected between the timing controller and the plurality of light-source drivers, and configured to provide a plurality of dimming level signals to the plurality of light-source drivers based on a switch control signal.

公开(公告)号：US11107418B2

公开(公告)日：2021-08-31

申请号：US16803572

申请日：2020-02-27

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Kihyun Pyun ,  Sung-In Kang ,  Kyunho Kim

IPC: G09G3/3283

Abstract: A display device includes a display panel including pixels, a luminance controller that divides the display panel into blocks based on coordinate information, calculates a block reference current based on a block current sensed in each of the blocks when reference images are sequentially displayed on the blocks, calculates a target current based on the block reference current and a block load of each of the blocks based on input image data, and calculates a scaling factor based on the target current and a sensing current sensed in each of the blocks when an input image corresponding to the input image data is displayed on the display panel, and a data driver that generates a data voltage corresponding to the input image data and supplies the data voltage to the pixels by adjusting a voltage level of the data voltage based on the scaling factor.