公开(公告)号：US10810942B2

公开(公告)日：2020-10-20

申请号：US16205512

申请日：2018-11-30

Applicant: Samsung Display Co., Ltd.

Inventor： Si Beak Pyo ,  Choon Yul Oh

IPC: G09G3/3258 ,  H01L27/32 ,  G01K3/10 ,  G09G3/3266 ,  G09G3/3275

Abstract: An organic light emitting display device includes a display panel, a display panel driver, and a power supply. The display panel includes pixels. Each of the pixels includes an organic light emitting diode configured to emit light in an emission period based on a first power supply voltage and a second power supply voltage. The display panel driver is configured to apply a scan signal, an emission control signal, and a data signal to the pixels. The power supply is configured to: generate the first power supply voltage, the second power supply voltage, and a third power supply voltage applied to the pixels in a non-emission period; and adjust a voltage level of the second power supply voltage and a voltage level of the third power supply voltage based on an ambient temperature and a brightness of the display panel.

公开(公告)号：US12087203B2

公开(公告)日：2024-09-10

申请号：US18491499

申请日：2023-10-20

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Si Beak Pyo ,  Seung Kyu Lee ,  Choon Yul Oh ,  Jun Ho Hwang

IPC: G09G3/20 ,  G09G3/3233 ,  G09G3/32

CPC classification number: G09G3/2007 ,  G09G3/2003 ,  G09G3/3233 ,  G09G3/32 ,  G09G2320/0276 ,  G09G2320/0673 ,  G09G2320/0686

Abstract: A display device includes: a target pixel; observation target pixels located adjacent to the target pixel; and a grayscale corrector for converting an input grayscale value corresponding to the target pixel with reference to observation target grayscale values corresponding to the observation target pixels. The grayscale corrector includes: a light emitting pixel counter for providing a number of light emitting pixels by counting a number of observation target pixels that exceeds a reference value; and a grayscale converter for providing a converted grayscale value by converting the input grayscale value, based on the number of light emitting pixels.

公开(公告)号：US11961454B2

公开(公告)日：2024-04-16

申请号：US18055249

申请日：2022-11-14

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Si Beak Pyo ,  Seung Kyu Lee ,  Young Uk Hwang

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2310/027 ,  G09G2320/0233 ,  G09G2320/0285 ,  G09G2360/16

Abstract: A display device includes: a plurality of pixels to receive data voltages based on converted grayscales; and a grayscale converter to: calculate first compensation offsets based on positions of the pixels and input grayscales for the pixels; convert the first compensation offsets into second compensation offsets according to a maximum luminance weight based on an input maximum luminance; and calculate the converted grayscales by applying the second compensation offsets to the input grayscales.

公开(公告)号：US11804173B1

公开(公告)日：2023-10-31

申请号：US17947219

申请日：2022-09-19

Applicant: Samsung Display Co., Ltd.

Inventor： Si Beak Pyo

IPC: G09G3/32

CPC classification number: G09G3/32 ,  G09G2310/08 ,  G09G2320/0626

Abstract: A display device includes a light emitting element, a timing controller, and an initialization power generator. The timing controller determines whether a second image associated with a second frame is different from a first image associated with a first frame. The second frame immediately follows the first frame. The initialization power generator is electrically connected to the timing controller, provides a reference voltage for initializing the light emitting element in the second frame when/if the second image is identical to the first image, and provides a first adjusted voltage unequal to the reference voltage for initializing the light emitting element in the second frame when/if the second image is different from the first image.

公开(公告)号：US11600217B2

公开(公告)日：2023-03-07

申请号：US17734408

申请日：2022-05-02

Applicant: Samsung Display Co., Ltd.

Inventor： Si Beak Pyo ,  Hyun Jung Son

IPC: G09G3/22 ,  G09G5/10

Abstract: Provided is an optical compensation method for a display device including a pixel coupled between first power and second power sources. In the optical compensation method, the first voltage level of the second power source corresponding to a first luminance level is set while measuring the luminance of the display device, the second voltage level of the second power source corresponding to a second luminance level is set while measuring the luminance of the display device, the third voltage levels of the second power source for representative luminance levels including the first and second luminance levels are set based on the first and second voltage levels, and the fourth voltage levels of the second power source for the representative luminance levels according to temperature conditions are set based on the third voltage levels and temperature offsets according to the temperature conditions, under which the display device is driven.

公开(公告)号：US11545073B2

公开(公告)日：2023-01-03

申请号：US16735134

申请日：2020-01-06

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Si Beak Pyo ,  Seung Kyu Lee ,  Min Seong Son

IPC: G09G3/32 ,  G09G3/20

Abstract: A display device includes a display unit including a plurality of pixels coupled to a plurality of data lines, a plurality of scan lines, and a plurality of emission control lines, a controller for determining a width of a gate-off section of an emission control signal, which corresponds to a non-emission section of each of a plurality of frames belonging to a dimming period, in response to a dimming signal, and an emission driver for supplying the emission control signal in units of a plurality of consecutive pixel rows through the plurality of emission control lines.

公开(公告)号：US11302238B2

公开(公告)日：2022-04-12

申请号：US16532411

申请日：2019-08-05

Applicant: Samsung Display Co., Ltd.

Inventor： Si Beak Pyo ,  Seung Kyu Lee ,  Choon Yul Oh ,  Jun Ho Hwang

IPC: G09G3/20 ,  G09G3/3233 ,  G09G3/32

Abstract: A display device includes: a target pixel; observation target pixels located adjacent to the target pixel; and a grayscale corrector for converting an input grayscale value corresponding to the target pixel with reference to observation target grayscale values corresponding to the observation target pixels. The grayscale corrector includes: a light emitting pixel counter for providing a number of light emitting pixels by counting a number of observation target pixels that exceeds a reference value; and a grayscale converter for providing a converted grayscale value by converting the input grayscale value, based on the number of light emitting pixels.

公开(公告)号：US10049617B2

公开(公告)日：2018-08-14

申请号：US15237201

申请日：2016-08-15

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Won Ju Shin ,  Si Beak Pyo

IPC: A61B5/0402 ,  G06F3/041 ,  G09G3/3225 ,  G09G3/20 ,  G06F3/01 ,  G09G3/36 ,  A61B5/024 ,  G09G5/10

Abstract: A display device may include a display panel, a data driver transmitting a data signal, a scan driver sequentially transmitting a scan signal, a frequency selector for selecting a driving frequency for image display, selecting a low frequency if the image displayed on the display panel is a first image and selecting a normal frequency if the image displayed on the display panel is not the first image, the normal frequency being higher than the low frequency. The display device also includes a timing controller for controlling the data driver and the scan driver based on the selected driving frequency. The timing controller may control the data driver and the scan driver such that luminance of the display panel on which the first image is displayed is periodically changed according to the low frequency if the image displayed on the display panel is the first image.

公开(公告)号：US11501694B2

公开(公告)日：2022-11-15

申请号：US17248443

申请日：2021-01-25

Applicant: Samsung Display Co., Ltd.

Inventor： Si Beak Pyo ,  Seung Kyu Lee ,  Young Uk Hwang

IPC: G09G3/32

Abstract: A display device includes: a plurality of pixels to receive data voltages based on converted grayscales; and a grayscale converter to: calculate first compensation offsets based on positions of the pixels and input grayscales for the pixels; convert the first compensation offsets into second compensation offsets according to a maximum luminance weight based on an input maximum luminance; and calculate the converted grayscales by applying the second compensation offsets to the input grayscales.

公开(公告)号：US11450266B2

公开(公告)日：2022-09-20

申请号：US17531633

申请日：2021-11-19

Applicant: Samsung Display Co., Ltd.

Inventor： Si Beak Pyo ,  Sung Kook Kim

IPC: G09G3/3208

Abstract: A luminance control unit includes: a driving power voltage setting unit configured to determine a driving power voltage to be provided to a display panel, the driving power voltage corresponding to a target brightness, based on a plurality of driving power voltages respectively corresponding to a plurality of reference brightnesses of the display panel; and a gamma voltage setting unit configured to determine a target luminance corresponding to the target brightness, based on a plurality of target luminances respectively corresponding to the plurality of reference brightnesses, and to set gamma voltages for implementing the target luminance, wherein the driving power voltage and the gamma voltages are differently set with respect to the same reference brightness according to an ambient illumination intensity of the display panel.