公开(公告)号：US20220164930A1

公开(公告)日：2022-05-26

申请号：US17195632

申请日：2021-03-08

Applicant: LG ELECTRONICS INC.

Inventor： Hyomin KIM ,  Yeonoh NAM

IPC: G06T5/00 ,  G06T5/40 ,  G09G5/10

Abstract: A tone mapping apparatus includes a dynamic tone mapping module configured to generate a first tone mapping curve based on a luminance distribution histogram of input image data and generate first image data from the input image data using the first tone mapping curve, and a processor configured to generate an RGB distribution histogram, a detail region histogram and a high-luminance region histogram based on pixel information of the first image data, generate a second tone mapping curve using the RGB distribution histogram, the detail region histogram and the high-luminance region histogram and generate output image data from the first image data using the second tone mapping curve.

公开(公告)号：US20230169631A1

公开(公告)日：2023-06-01

申请号：US17580138

申请日：2022-01-20

Applicant: LG ELECTRONICS INC.

Inventor： Hyomin KIM ,  Kyuri KIM ,  Hyun JUNG ,  Chanho LEE

IPC: G06T5/00 ,  G06T7/11

CPC classification number: G06T5/008 ,  G06T7/11 ,  G06T2207/20092

Abstract: A display device according to an embodiment may include a controller and a display unit. The controller may perform tone mapping for adjusting luminance of input image data, and the display unit may display an image according to output image data whose luminance is adjusted by the tone mapping. The controller may generate a base mapping curve for an entire region from the input image data, extract information for each local region of the entire region, and generate a local mapping curve reflecting the information for each local region with respect to each local region to perform tone mapping.

公开(公告)号：US20220318964A1

公开(公告)日：2022-10-06

申请号：US17596894

申请日：2019-06-20

Applicant: LG ELECTRONICS INC.

Inventor： Hyomin KIM ,  Kangsoo KIM ,  Jonghyung LEE

IPC: G06T5/00 ,  G06T5/40 ,  G09G3/20

Abstract: The present invention relates to a display device for providing improved dynamic tone mapping, the device comprising: a control unit for performing tone mapping to adjust a luminance of an input image by using a tone curve; and a display unit for displaying an image, the luminance of which has been adjusted by tone mapping, wherein the control unit may calculate a threshold value for separation of an object and a background in the input image, and may change the tone curve on the basis of the threshold value.

公开(公告)号：US20210319751A1

公开(公告)日：2021-10-14

申请号：US17277493

申请日：2019-09-18

Applicant: LG ELECTRONICS INC.

Inventor： Jonghyung LEE ,  Kangsoo KIM ,  Hyomin KIM

IPC: G09G3/3233 ,  G06F3/033 ,  G06F3/0482

Abstract: 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：US20220028353A1

公开(公告)日：2022-01-27

申请号：US17277225

申请日：2019-09-18

Applicant: LG ELECTRONICS INC.

Inventor： Jonghyung LEE ,  Kangsoo KIM ,  Hyomin KIM

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

Abstract: 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.