公开(公告)号：US11249532B2

公开(公告)日：2022-02-15

申请号：US17155061

申请日：2021-01-21

Applicant: Samsung Display Co., Ltd.

Inventor： Eun Ryeol Baek ,  Yoon Young Lee

IPC: G06F1/32 ,  G06F1/08 ,  G06F1/10 ,  G06F1/12 ,  G06F1/3206

Abstract: A display device includes: a display panel including scan lines, a first power line, a second power line, and pixels connected to the scan lines and the first and second power lines; a gate driver to sequentially provide scan signals to the scan lines based on a clock signal; and a power supply including transistors to convert an input power voltage into a first power voltage through a switching operation of the transistors and to supply the first power voltage to the first power line through a first output terminal. In response to an amount of current flowing through the pixels being less than a first reference current amount, the power supply is configured to change one or more of an off-duty of at least one of the transistors, a channel capacitance of at least one of the transistors, a switching frequency of at least one of the transistors, and a slew rate of at least one of control signals for the transistors.

公开(公告)号：US11783768B2

公开(公告)日：2023-10-10

申请号：US16736622

申请日：2020-01-07

Applicant: Samsung Display Co., Ltd.

Inventor： Eun Ryeol Baek

IPC: G09G3/3208 ,  H02M1/36 ,  H02M3/07

CPC classification number: G09G3/3208 ,  H02M1/36 ,  G09G2310/08 ,  G09G2330/021 ,  G09G2380/10 ,  H02M3/07

Abstract: A power supply may include a power converter configured to supply a driving voltage to a display panel. The power converter may also include a sub-power unit configured to supply a sub-driving voltage to the display panel when the power converter operates abnormally.

公开(公告)号：US11145236B2

公开(公告)日：2021-10-12

申请号：US16851811

申请日：2020-04-17

Applicant: Samsung Display Co., Ltd.

Inventor： Eun Ryeol Baek

IPC: G09G3/20

Abstract: A display device includes: a display unit including a plurality of pixels to display an image according to a driving voltage; a data driver to provide data signals to the plurality of pixels; a gamma voltage generator to provide a plurality of grayscale voltages to the data driver; and a reference voltage generator to provide a first reference voltage and a second reference voltage to the gamma voltage generator. The gamma voltage generator is to generate the plurality of grayscale voltages by dividing the first reference voltage and the second reference voltage, and the reference voltage generator is to generate a sensing driving voltage by measuring the driving voltage from the display unit, and to generate the first reference voltage and the second reference voltage by utilizing the sensing driving voltage and a reference driving voltage.