公开(公告)号：US12057076B2

公开(公告)日：2024-08-06

申请号：US18086762

申请日：2022-12-22

Applicant: Samsung Display Co., Ltd.

Inventor： Dae-Sik Lee ,  Siduk Sung ,  Songyi Han

IPC: G09G3/30 ,  G09G3/3266

CPC classification number: G09G3/3266 ,  G09G2310/0289 ,  G09G2310/08 ,  G09G2330/02 ,  G09G2330/025 ,  G09G2330/04 ,  G09G2330/12

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：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：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.