公开(公告)号：US20210233456A1

公开(公告)日：2021-07-29

申请号：US17008409

申请日：2020-08-31

Applicant: Samsung Display Co., Ltd.

Inventor： Jong Man KIM ,  Sang Su HAN ,  Da Eun KANG ,  Jae Woo RYU

IPC: G09G3/20

Abstract: A display device and a method of driving the same are described. The display device includes: an over driver to overdrive current frame data included in input image data to output overdriving frame data; a data driver to generate a data signal for the current frame data based on the overdriving frame data; and a display panel including a plurality of pixels to receive the data signal, the over driver may calculate a temporal change rate or a spatial change rate of the input image data, and output the overdriving frame data utilizing a reference formula having a first main parameter determined according to the calculated result. Therefore, overdriving may be performed dynamically according to the spatial change rate or the temporal change rate of the input image data.

公开(公告)号：US20210217368A1

公开(公告)日：2021-07-15

申请号：US16942224

申请日：2020-07-29

Applicant: Samsung Display Co., Ltd.

Inventor： Young Soo SOHN ,  Jong Man KIM ,  Bong Gyun KANG ,  Jae Woo RYU ,  Sung Mo YANG

IPC: G09G3/3291

Abstract: A display device includes a display panel, a first memory, and a degradation compensator. The first memory device stores stress data including degradation values representing a degradation degree of each of the blocks in the display panel. The degradation compensator loads the stress data from the first memory device, updates the stress data based on current input data and a maximum degradation value, updates the maximum degradation value based on degradation values included in the updated stress data, and generate compensated data by compensating for the current input data based on the updated stress data. The degradation compensator determines whether a first degradation value included in the stress data is normal by comparing the first degradation value with the maximum degradation value, and updates the first degradation value based on at least one adjacent degradation value adjacent to the first degradation value, when the first degradation value is abnormal.

公开(公告)号：US20210099083A1

公开(公告)日：2021-04-01

申请号：US16871157

申请日：2020-05-11

Applicant: Samsung Display Co., Ltd.

Inventor： Kyun Ho KIM ,  Jung-taek KIM ,  Joon Suk BAIK ,  Sang Su HAN ,  Jae Woo RYU ,  Myung Ho LEE

IPC: H02M3/156 ,  H03F3/14

Abstract: A power voltage generator includes a booster, a voltage sensor, a constant voltage controller and a constant current controller. The booster is configured to boost an input voltage to an output voltage based on an on-off operation of a switch. The voltage sensor is configured to generate a sensing voltage by sensing the output voltage. The constant voltage controller is configured to generate a first switching signal to control the switch by comparing the sensing voltage with a reference voltage. The constant current controller is configured to generate a gain based on a ratio of an electrode signal of the switch and a target signal by comparing the electrode signal of the switch with the target signal.