公开(公告)号：US09870733B2

公开(公告)日：2018-01-16

申请号：US14700719

申请日：2015-04-30

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Byung-Ki Chun ,  Jae-Shin Kim ,  Jeong-Hun So ,  Won-Woo Jang

IPC: G09G3/32 ,  G09G3/3225 ,  G09G3/20

CPC classification number: G09G3/3225 ,  G09G3/2007 ,  G09G2320/0276 ,  G09G2320/029 ,  G09G2360/16

Abstract: A data signal processing device includes a load calculator and a compensation processor. The load calculator calculates an on-pixel rate (OPR) based on image data signals and positional weight values. The positional weight values are determined based on locations of pixels in a display panel. The OPR is proportional to a frame luminance load, which corresponds to a sum of driving currents for the pixels to emit light in each of a plurality of frames. The compensation processor compensates distorted luminance caused by the frame luminance load based on the OPR.

公开(公告)号：US09947265B2

公开(公告)日：2018-04-17

申请号：US14692054

申请日：2015-04-21

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jong-Woong Park ,  Jae-Shin Kim

IPC: G09G3/3208

CPC classification number: G09G3/3208 ,  G09G2320/0233 ,  G09G2320/0285 ,  G09G2320/043 ,  G09G2320/045 ,  G09G2360/16

Abstract: A method for driving an electroluminescent display device includes grouping pixels in a display panel into a plurality of pixel groups, each pixel group including a plurality of rows and a plurality of columns. Accumulated block stress values are provided based on input image data. Each accumulated block stress value represents a degree of degeneration of the pixels in each pixel block. Corrected stress values are provided by correcting each accumulated block stress value based on the accumulated block stress values of the adjacent pixel blocks. Input image data is corrected based on the corrected stress values.

公开(公告)号：US09940872B2

公开(公告)日：2018-04-10

申请号：US15184945

申请日：2016-06-16

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Bo-Young An ,  Jae-Shin Kim ,  Ho-Suk Maeng ,  Jong-Woong Park

IPC: G09G3/32 ,  G09G3/3208 ,  G09G3/20

CPC classification number: G09G3/3208 ,  G09G3/2003 ,  G09G3/3233 ,  G09G2320/0242 ,  G09G2320/048 ,  G09G2330/026

Abstract: A degradation compensating device includes an accumulator configured to accumulate stress data every pixel block, a memory configured to receive the stress data from the accumulator, and to load accumulated data from an external flash memory when a display device power is turned on, the accumulated data being a total sum of the stress data, a compensation factor calculator configured to determine a target compensation factor based on the accumulated data to compensate image data, and to apply an initial compensation factor to the target compensation factor during a wake-up period after loading the accumulated data is completed, the initial compensation factor being changed gradually during the wake-up period, and a data compensator configured to generate image compensation data based on the target compensation factor, and to generate initial image data based on a wake-up factor that is an adjusted target compensation factor based on the initial compensation factor.

公开(公告)号：US20170162109A1

公开(公告)日：2017-06-08

申请号：US15184945

申请日：2016-06-16

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Bo-Young An ,  Jae-Shin Kim ,  Ho-Suk Maeng ,  Jong-Woong Park

IPC: G09G3/3208 ,  G09G3/20

CPC classification number: G09G3/3208 ,  G09G3/2003 ,  G09G3/3233 ,  G09G2320/0242 ,  G09G2320/048 ,  G09G2330/026

Abstract: A degradation compensating device includes an accumulator configured to accumulate stress data every pixel block, a memory configured to receive the stress data from the accumulator, and to load accumulated data from an external flash memory when a display device power is turned on, the accumulated data being a total sum of the stress data, a compensation factor calculator configured to determine a target compensation factor based on the accumulated data to compensate image data, and to apply an initial compensation factor to the target compensation factor during a wake-up period after loading the accumulated data is completed, the initial compensation factor being changed gradually during the wake-up period, and a data compensator configured to generate image compensation data based on the target compensation factor, and to generate initial image data based on a wake-up factor that is an adjusted target compensation factor based on the initial compensation factor.