公开(公告)号：US11594177B2

公开(公告)日：2023-02-28

申请号：US17277493

申请日：2019-09-18

申请人： LG ELECTRONICS INC.

发明人： Jonghyung Lee ,  Kangsoo Kim ,  Hyomin Kim

IPC分类号： G09G3/3233 ,  G06F3/033 ,  G06F3/0482 ,  G09G3/3266 ,  G09G3/3283

摘要： The present disclosure relates to an image display apparatus. The image display apparatus includes: a display including an organic light emitting diode panel (OLED panel); and a controller configured to control the display, wherein the controller calculates an Average Picture Level (APL) of an input image, and in response to the calculated APL being greater than or equal to a first reference value in a high-dynamic range (HDR) mode, the controller decreases the APL and perform luminance conversion based on the decreased APL, and in response to the calculated APL being greater than or equal to the first reference value in a normal mode rather than the HDR mode, the controller performs luminance conversion based on the calculated APL. Accordingly, luminance representation may be improved during displaying image.

公开(公告)号：US11532289B2

公开(公告)日：2022-12-20

申请号：US17277225

申请日：2019-09-18

申请人： LG ELECTRONICS INC.

发明人： Jonghyung Lee ,  Kangsoo Kim ,  Hyomin Kim

IPC分类号： H04N21/485 ,  G09G5/10 ,  G09G3/3233

摘要： The present disclosure relates to an image display apparatus. The image display apparatus includes: a display; and a controller configured to control the display, wherein the controller detects a first peak area corresponding to a luminance value greater than or equal to a first reference value, and a second peak area corresponding to a luminance value between the first reference value and a second reference value less than the first reference value, in response to the number of pixels in the second peak area being less than or equal to a predetermined number, the controller performs first tone mapping based on the first peak area, the controller performs second tone mapping based on the first peak are and the second peak area, wherein a luminance value of the second peak area during the second tone mapping is greater than a luminance value of the second peak area during the first tone mapping. Accordingly, luminance and contrast during displaying image may be improved.

公开(公告)号：US11315522B2

公开(公告)日：2022-04-26

申请号：US16728742

申请日：2019-12-27

申请人： LG ELECTRONICS INC.

发明人： Jonghyung Lee ,  Kangsoo Kim ,  Jiwoong Cho

IPC分类号： G09G3/32 ,  G09G5/10 ,  G09G3/3233

摘要： Disclosed is an image display apparatus. The image display apparatus includes: a display; an illumination sensor configured to sense ambient illumination of the display; and a signal processing unit configured to output an image-quality-processed image signal to the display, wherein the signal processing unit is configured to, based on information on the illumination sensed by the illumination sensor, convert gray level of an input image according to a first gray level conversion mode or according to a second gray level conversion mode in which an amount of increase in gray level is greater than in the first gray level conversion mode. Accordingly, it is possible to improve gray level expression of a displayed image in response to ambient illumination of the display.

公开(公告)号：US09852700B2

公开(公告)日：2017-12-26

申请号：US14912870

申请日：2013-12-20

申请人： LG ELECTRONICS INC.

发明人： Seongyeol Ahn ,  Kangsoo Kim

IPC分类号： G09G3/34 ,  G02F1/1335 ,  G09G3/36

CPC分类号： G09G3/3426 ,  G02F1/1336 ,  G02F2001/133601 ,  G09G3/3648 ,  G09G2320/0646 ,  G09G2320/0686 ,  G09G2360/16

摘要： A liquid crystal display and a method for driving the same are disclosed. The liquid crystal display includes a display panel which is virtually divided into a plurality of blocks, a backlight unit including a plurality of light sources irradiating light onto the display panel, a backlight dimming controller which analyzes digital video data, calculates a dimming value of each of the blocks, and adjusts a global dimming value based on the dimming values of the blocks so as to increase brightness of the plurality of light sources within previously determined power consumption, and a light source driver which outputs light source driving signals for driving the plurality of light sources based on the dimming values of the blocks and the global dimming value.