公开(公告)号：US10715775B2

公开(公告)日：2020-07-14

申请号：US16246294

申请日：2019-01-11

Applicant: LG ELECTRONICS INC.

Inventor： Kyuri Kim

IPC: H04N9/77 ,  H04N9/68 ,  H04N9/64 ,  G06T5/00

Abstract: The present invention discloses a multimedia device for processing a video signal and control method thereof. According to an embodiment of the present invention, the multimedia device includes a controller configured to perform tone mapping, a dynamic contrast function, and a local contrast function. The controller performs the tone mapping not only on an HDR video signal but also on an SDR video signal. When performing the tone mapping on the SDR video signal, the controller amplifies only an intermediate-gradient region without adjusting low-gradient and high-gradient regions. When performing the dynamic contrast function, the controller only an intermediate-gradient region of the video signal without adjusting low-gradient and high-gradient regions. When performing the local contrast function, the controller divides the video signal into blocks, calculates an APL value of each block, and then applies a linear curve based on the APL value.

公开(公告)号：US11297295B1

公开(公告)日：2022-04-05

申请号：US17090826

申请日：2020-11-05

Applicant: LG ELECTRONICS INC.

Inventor： Kyuri Kim

IPC: G06T7/136 ,  H04N9/77 ,  G09G3/20

Abstract: One or more embodiments of the present invention are directed to a display device including a display unit configured to output an image, a brightness converting unit configured to acquire a brightness corrected image by correcting brightness of the image, and a controller configured to detect a face included in the image, to acquire a color corrected image by applying a gain value to a color of the brightness corrected image according to whether the face is detected, and to output the color corrected image or the brightness corrected image through the display unit.

公开(公告)号：US11961212B2

公开(公告)日：2024-04-16

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：US12008741B2

公开(公告)日：2024-06-11

申请号：US17627836

申请日：2019-07-31

Applicant: LG ELECTRONICS INC.

Inventor： Kyuri Kim ,  Jongmin Park

IPC: G06T5/92 ,  G06T5/40

CPC classification number: G06T5/92 ,  G06T5/40 ,  G06T2207/10024 ,  G06T2207/20021 ,  G06T2207/20208

Abstract: A display device including a display; one or more processors; and a memory storing one or more programs configured to be executed by the one or more processors, the one or more programs including instructions for receiving an input image to be displayed on the display; selecting a look-up table (LUT) curve stored in the memory for the received input image; performing a histogram on the received input image; applying an offset gain to the selected LUT curve based on the histogram to generate an offset LUT curve; performing tone mapping of the input image through the offset LUT curve; and displaying the tone mapped image on the display.

公开(公告)号：US11580899B1

公开(公告)日：2023-02-14

申请号：US17721149

申请日：2022-04-14

Applicant: LG ELECTRONICS INC.

Inventor： Kyuri Kim ,  Jongmin Park

IPC: G09G3/32

Abstract: Provided is a display device including a controller and a display. The controller may perform tone mapping for adjusting luminance of input image data, and the display may display an image according to an output image data, in which luminance is adjusted by the tone mapping. The controller may generate a base mapping curve from the input image data, analyze depth map information of the input image data, generate a mapping curve, to which the depth map information is reflected, from the base mapping curve, and perform the tone mapping using the mapping curve.