公开(公告)号：US09685123B2

公开(公告)日：2017-06-20

申请号：US14696884

申请日：2015-04-27

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Ho-In Kim ,  Won-Jin Seo ,  Jun-Ho Hwang

IPC: G09G3/36

CPC classification number: G09G3/3607 ,  G09G2320/0233 ,  G09G2320/0247 ,  G09G2320/0276 ,  G09G2320/0673

Abstract: In a method of testing a display apparatus, a plurality of minimum compensation data for a plurality of grayscales, respectively and a plurality of maximum compensation data for the plurality of grayscales, respectively are determined. The display apparatus includes a display panel displaying an image having the plurality of grayscales. A plurality of grayscale compensation data corresponding to the plurality of grayscales, respectively are set based on the plurality of minimum compensation data and the plurality of maximum compensation data. A flicker characteristic with respect to the plurality of grayscales is measured based on the plurality of grayscale compensation data and test images displayed on the display panel. The flicker characteristic is optimized by selectively changing the plurality of grayscale compensation data based on the measured flicker characteristic.

公开(公告)号：US09691337B2

公开(公告)日：2017-06-27

申请号：US14459200

申请日：2014-08-13

Applicant: Samsung Display Co., LTD.

Inventor： Ho-In Kim ,  Young-Sun Kwak ,  Jun-Ho Hwang

IPC: G09G3/36 ,  G02F1/1335 ,  G09G3/00

CPC classification number: G09G3/3607 ,  G02F1/1336 ,  G09G3/006 ,  G09G3/3648 ,  G09G2320/0233 ,  G09G2320/0276 ,  G09G2320/0673

Abstract: A digital gamma correction part includes a memory and a selector. The memory is configured to store a basic gamma reference data, a first compensated gamma reference data and a second compensated gamma reference data, where respective data of the first compensated gamma reference data are greater than respective data of the basic gamma reference data, and respective data of the second compensated gamma reference data are less than respective data of the basic gamma reference data. The selector is configured to receive a luminance data determined based on a luminance of a display panel, and to output a gamma reference data by selecting one from the basic gamma reference data, the first compensated gamma reference data and the second compensated gamma reference data based on the luminance data and a gamma converted reference range.

公开(公告)号：US10147384B2

公开(公告)日：2018-12-04

申请号：US15063847

申请日：2016-03-08

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jun-Ho Hwang ,  Ho-In Kim ,  Shim-Ho Yi

IPC: G09G3/36 ,  H02M3/07

Abstract: A boosting voltage generator includes a switching circuit, a control circuit and a boosting circuit. The switching circuit is connected to a first input terminal receiving a first frame signal and a second input terminal receiving a second frame signal, and generates a first switching signal and a second switching signal based on a voltage at the first input terminal and a voltage at the second input terminal. The second frame signal has a phase opposite to that of the first frame signal. The control circuit is connected to the first and second input terminals, and selectively connects the first and second input terminals with a ground voltage based on a mode selection signal. The boosting circuit generates a first boosting voltage and a second boosting voltage based on the first switching signal, the second switching signal, a first feedback voltage and a second feedback voltage.