公开(公告)号：US20210056926A1

公开(公告)日：2021-02-25

申请号：US17092650

申请日：2020-11-09

Applicant: Samsung Display Co., Ltd.

Inventor： Jahun KOO ,  Haksun KIM ,  Kyung-hun LEE

IPC: G09G5/00 ,  G09G3/20 ,  H04N7/01

Abstract: A display device includes a display panel which includes pixels arranged in a matrix form and a controller which receives a first image signal corresponding to a first active period of a first frame, outputs a first final output signal corresponding to a first conversion active period of the first frame, and drives the display panel based on the first final image signal. The controller includes a timing changing unit which receives the first image signal and changes a first image signal pixel size corresponding to the first image signal to a panel pixel size corresponding to the display panel to generate the first output signal, and a frequency changing unit which receives the first output signal from the timing changing unit and reduces a frame frequency of the first output signal based on the first image signal to output the first final output signal.

公开(公告)号：US20180151149A1

公开(公告)日：2018-05-31

申请号：US15818008

申请日：2017-11-20

Applicant: Samsung Display Co., Ltd.

Inventor： Jahun KOO ,  Haksun KIM ,  Kyung-hun LEE

IPC: G09G5/00 ,  G09G3/20 ,  H04N7/01

CPC classification number: G09G5/005 ,  G09G3/2092 ,  G09G2310/08 ,  G09G2320/103 ,  G09G2340/04 ,  G09G2340/0407 ,  G09G2340/0435 ,  H04N7/0122

Abstract: A display device includes a display panel which includes pixels arranged in a matrix form and a controller which receives a first image signal corresponding to a first active period of a first frame, outputs a first final output signal corresponding to a first conversion active period of the first frame, and drives the display panel based on the first final image signal. The controller includes a timing changing unit which receives the first image signal and changes a first image signal pixel size corresponding to the first image signal to a panel pixel size corresponding to the display panel to generate the first output signal, and a frequency changing unit which receives the first output signal from the timing changing unit and reduces a frame frequency of the first output signal based on the first image signal to output the first final output signal.

公开(公告)号：US20210035507A1

公开(公告)日：2021-02-04

申请号：US16773887

申请日：2020-01-27

Applicant: Samsung Display Co., Ltd.

Inventor： Jahun KOO ,  Seong Soon CHO ,  Jongwoon KIM ,  Kyung-Hun LEE

IPC: G09G3/34

Abstract: A display device includes a backlight unit including light source rows, each of the light source rows including light source blocks, a display panel configured to display an image by transmitting light emitted by the backlight unit, a panel driver configured to drive the display panel, and a backlight driver configured to drive the backlight unit. The backlight driver is configured to perform a vertical direction scan operation that sequentially select the light source rows and a horizontal direction sequential driving operation that sequentially drives the light source blocks included in a selected light source row of the light source rows.

公开(公告)号：US20200175930A1

公开(公告)日：2020-06-04

申请号：US16657408

申请日：2019-10-18

Applicant: Samsung Display Co., Ltd.

Inventor： Jahun KOO ,  Su-Han WOO ,  Kyung-Hun LEE

IPC: G09G3/34 ,  G09G3/36

Abstract: A method of adjusting luminance of a backlight unit included in a liquid crystal display device that performs inversion driving is provided. The method derives a positive polarity histogram and a negative polarity histogram of an image frame based on image frame data, corresponding to the image frame, and a data polarity pattern for implementing the image frame, derives a luminance compensation value according to data polarity dominance of the image frame by analyzing the positive polarity histogram and the negative polarity histogram, and applies the luminance compensation value to the luminance of the backlight unit during a portion of a time period of the image frame.

公开(公告)号：US20190279596A1

公开(公告)日：2019-09-12

申请号：US16426531

申请日：2019-05-30

Applicant: Samsung Display Co., Ltd.

Inventor： Jahun KOO ,  Haksun KIM ,  Kyung-hun LEE

IPC: G09G5/00 ,  G09G3/20 ,  H04N7/01

Abstract: A display device includes a display panel which includes pixels arranged in a matrix form and a controller which receives a first image signal corresponding to a first active period of a first frame, outputs a first final output signal corresponding to a first conversion active period of the first frame, and drives the display panel based on the first final image signal. The controller includes a timing changing unit which receives the first image signal and changes a first image signal pixel size corresponding to the first image signal to a panel pixel size corresponding to the display panel to generate the first output signal, and a frequency changing unit which receives the first output signal from the timing changing unit and reduces a frame frequency of the first output signal based on the first image signal to output the first final output signal.

公开(公告)号：US20190228733A1

公开(公告)日：2019-07-25

申请号：US16244344

申请日：2019-01-10

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Jahun KOO ,  Kyung-Hun LEE ,  Ho LEE

IPC: G09G3/36 ,  G02F1/133 ,  G09G5/12

Abstract: A liquid crystal display device includes a source device that outputs image data and a sink device that performs a displaying operation based on the image data. The source device changes a frame rate of an image frame composing the image data while the displaying operation is performed. The sink device changes a frame rate of a panel driving frame for the displaying operation by adjusting a vertical blank period of the panel driving frame as the frame rate of the image frame is changed. Here, the sink device adjusts a common voltage applied to a display panel included in the sink device during a display operation of an individual frame, in accordance with the frame rate of the panel driving frame.

公开(公告)号：US20190005907A1

公开(公告)日：2019-01-03

申请号：US15906058

申请日：2018-02-27

Applicant: Samsung Display Co., LTD.

Inventor： Jahun KOO ,  Kyung-Hun LEE

IPC: G09G3/36

Abstract: A display apparatus includes a display panel, a gate driver and a data driver. The display panel is configured to display an image. The gate driver is configured to output a gate signal to the display panel. The data driver is configured to output a data voltage to the display panel. The display panel includes a first subpixel row including first subpixels having a first color and a second subpixel row including second subpixels having a second color. A first gate off voltage of a first gate signal applied to the first subpixel row to turn off switching elements of the first subpixel row is different from a second gate off voltage of a second gate signal applied to the second subpixel row to turn off switching elements of the second subpixel row.

公开(公告)号：US20180158432A1

公开(公告)日：2018-06-07

申请号：US15829007

申请日：2017-12-01

Applicant: Samsung Display Co., Ltd.

Inventor： Jahun KOO ,  Haksun KIM ,  Kyung-hun LEE ,  Ho LEE

IPC: G09G3/36 ,  G09G3/3291 ,  G09G5/00

Abstract: A display device includes a display panel which includes a plurality of gate lines and a plurality of pixels, where each of the pixels is connected to a corresponding gate line among the gate lines, and a gate driving circuit which includes a stage that applies a gate signal to at least one of the gate lines. The gate signal includes a high period in which the gate signal has a high voltage and a low period in which the gate signal has a low voltage having a level less than a level of the high voltage, and the low period includes a falling period in which the low voltage falls to a second level from a first level which is greater than the second level.