公开(公告)号：US20160133205A1

公开(公告)日：2016-05-12

申请号：US14918487

申请日：2015-10-20

Applicant: LG Display Co., Ltd.

Inventor： Kyungjoon Kwon ,  Cheon Heo

IPC: G09G3/36 ,  G09G3/34

CPC classification number: G09G3/342 ,  G09G2320/0271 ,  G09G2320/029 ,  G09G2320/0626 ,  G09G2320/0646 ,  G09G2330/023

Abstract: The present disclosure provides method and device for dimming the backlight of an LCD. A number of pixels at each grayscale level of an input image is determined. The determined number of pixels at each grayscale level is accumulated to generate an accumulated distribution of the number of pixel and the accumulated distribution is filtered. A threshold grayscale level at which the filtered accumulated distribution exceeds a threshold value is determined. A scaling factor is determined based on the threshold grayscale level. The grayscale level of pixels of the input image having a grayscale level lower than or equal to the threshold grayscale level are up-scaled based on the scaling factor, the grayscale value of pixels of the input image having a grayscale level greater than the threshold grayscale level are set to have a predetermined clipping grayscale level, and the LCD backlight is dimmed based on the scaling factor.

Abstract translation: 本公开提供了用于使LCD的背光调光的方法和装置。 确定输入图像的每个灰度级的像素数。 在每个灰度级别确定的像素数量被累积以产生像素数目的累积分布，并且对累积分布进行滤波。 确定滤波后的累积分布超过阈值的阈值灰度级。 基于阈值灰度级确定缩放因子。 基于缩放因子，具有低于或等于阈值灰度级的灰度级的输入图像的像素的灰阶级别被调高，输入图像的像素的灰度值具有大于阈值灰度级的灰度级 电平设置为具有预定的削波灰度级，并且基于缩放因子使LCD背光变暗。

公开(公告)号：US09489725B2

公开(公告)日：2016-11-08

申请号：US14920473

申请日：2015-10-22

Applicant: LG Display Co., Ltd.

Inventor： Kyungjoon Kwon

IPC: G06T5/00 ,  G06K9/46 ,  G06K9/62 ,  G06T7/40 ,  G09G3/00

CPC classification number: G06T5/008 ,  G06K9/4652 ,  G06K9/4661 ,  G06K9/6215 ,  G06T5/009 ,  G06T2207/20021 ,  G06T2207/20028 ,  G06T2207/20208 ,  G09G3/00 ,  G09G3/3648 ,  G09G2300/0452 ,  G09G2320/0271 ,  G09G2320/0276

Abstract: An apparatus generates pixel data in a display. RGB pixel data is received corresponding to a target pixel of an image. A local adaption level is determined for the RGB pixel data representing perceived brightness of the RGB pixel data. The local adaption level is modified to generate a modified local adaption level. A transfer curve is generated based on the modified local adaption level and the transfer curve is applied to the input RGB pixel data. A local dimming value is generated to drive a light source driver of the display based on RGB pixel data for each of the pixels in the local dimming block and RGBW pixel data for each of the pixels in the local dimming block.

Abstract translation: 一种装置在显示器中生成像素数据。 对应于图像的目标像素接收RGB像素数据。 为表示RGB像素数据的感知亮度的RGB像素数据确定局部适应度。 修改局部自适应级别以生成修改后的局部自适应级别。 基于修改的局部自适应电平生成传输曲线，并将传输曲线应用于输入RGB像素数据。 产生局部调光值以基于局部调光块中的每个像素的RGB像素数据和本地调光块中的每个像素的RGBW像素数据来驱动显示器的光源驱动器。

公开(公告)号：US20160140924A1

公开(公告)日：2016-05-19

申请号：US14940908

申请日：2015-11-13

Applicant: LG DISPLAY CO., LTD.

Inventor： Cheon HEO ,  Kyungjoon Kwon

IPC: G09G3/36 ,  G09G3/32

CPC classification number: G09G3/2003 ,  G09G2300/0452 ,  G09G2340/06 ,  G09G2360/16

Abstract: A data clipping method and a display device using the same are disclosed. RGBW data is modulated by multiplying clipped data of an input image by a gain, a luminance increment is created based on the result of subtracting the clipped data from the modulated RGB data, and the luminance increment is added to the W data to be written to a W sub-pixel.

Abstract translation: 公开了一种数据剪辑方法和使用其的显示装置。 通过将输入图像的削减数据乘以增益来调制RGBW数据，基于从调制RGB数据中减去剪切数据的结果生成亮度增量，并将亮度增量添加到要写入的W数据 一个W子像素。

公开(公告)号：US10720112B2

公开(公告)日：2020-07-21

申请号：US14918487

申请日：2015-10-20

Applicant: LG Display Co., Ltd.

Inventor： Kyungjoon Kwon ,  Cheon Heo

IPC: G09G3/34

Abstract: The present disclosure provides method and device for dimming the backlight of an LCD. A number of pixels at each grayscale level of an input image is determined. The determined number of pixels at each grayscale level is accumulated to generate an accumulated distribution of the number of pixel and the accumulated distribution is filtered. A threshold grayscale level at which the filtered accumulated distribution exceeds a threshold value is determined. A scaling factor is determined based on the threshold grayscale level. The grayscale level of pixels of the input image having a grayscale level lower than or equal to the threshold grayscale level are up-scaled based on the scaling factor, the grayscale value of pixels of the input image having a grayscale level greater than the threshold grayscale level are set to have a predetermined clipping grayscale level, and the LCD backlight is dimmed based on the scaling factor.

公开(公告)号：US09240144B2

公开(公告)日：2016-01-19

申请号：US13849212

申请日：2013-03-22

Applicant: LG DISPLAY CO., LTD.

Inventor： Byoungchul Cho ,  Kyungjoon Kwon ,  Heewon Ahn ,  Changkyun Park

IPC: G09G5/02 ,  G09G3/34

CPC classification number: G09G3/3406 ,  G09G3/3426 ,  G09G2320/0233 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2360/16

Abstract: A liquid crystal display includes a liquid crystal display panel, a backlight unit including a plurality of light sources, the backlight unit providing light to a back surface of the liquid crystal display panel, a backlight driving circuit that individually drives a plurality of previously determined blocks each including the light sources based on a dimming value of each of the blocks, and a local dimming control circuit that calculates a pixel gain value compensating for a luminance reduction resulting from the dimming value of each block and corrects the pixel gain value based on a grayscale saturation level of each block.

Abstract translation: 液晶显示器包括液晶显示面板，包括多个光源的背光单元，背光单元向液晶显示面板的背面提供光;背光驱动电路，分别驱动多个先前确定的块 每个块包括基于每个块的调光值的光源，以及局部调光控制电路，其计算补偿由每个块的调光值导致的亮度降低的像素增益值，并且基于 每个块的灰阶饱和度。

公开(公告)号：US09990878B2

公开(公告)日：2018-06-05

申请号：US14940908

申请日：2015-11-13

Applicant: LG DISPLAY CO., LTD.

Inventor： Cheon Heo ,  Kyungjoon Kwon

IPC: G09G3/20

CPC classification number: G09G3/2003 ,  G09G2300/0452 ,  G09G2340/06 ,  G09G2360/16

Abstract: A data clipping method using red, green, blue and white data, and a display device using the same are disclosed. Red (R), Green (G), Blue (B), and White (W) data are modulated by multiplying clipped data of an input image by a gain, a luminance increment is created based on the result of subtracting the clipped data from the modulated RGB data, and the luminance increment is added to the W data to be written to a W sub-pixel.

公开(公告)号：US09378684B2

公开(公告)日：2016-06-28

申请号：US14514133

申请日：2014-10-14

Applicant: LG Display Co., Ltd.

Inventor： Dongwoo Kim ,  Heejung Hong ,  Kyungjoon Kwon ,  Heewon Ahn ,  Daeho Cho

IPC: G09G3/36 ,  G09G3/34

CPC classification number: G09G3/3406 ,  G09G3/3648 ,  G09G2320/0646 ,  G09G2320/066

Abstract: A method of compensating for pixel data includes extending a side portion and a corner portion of a real screen to set an virtual screen, setting dimming values of the virtual screen using dimming values of the real screen, calculating an amount of light of each of pixels on the real screen using the dimming values of the virtual screen mapped to a predetermined analysis area, and multiplying the amount of light of each pixel by a gain of each pixel to modulate pixel data.

Abstract translation: 补偿像素数据的方法包括延伸真实屏幕的侧部和角部以设置虚拟屏幕，使用实际屏幕的调光值设置虚拟屏幕的调光值，计算每个像素的光量 在实际屏幕上使用映射到预定分析区域的虚拟屏幕的调光值，并且将每个像素的光量乘以每个像素的增益以调制像素数据。

公开(公告)号：US09171491B1

公开(公告)日：2015-10-27

申请号：US14576580

申请日：2014-12-19

Applicant: LG Display Co., Ltd.

Inventor： Kyungjoon Kwon ,  Sungjo Koo

IPC: G09G3/20 ,  G09G3/36 ,  G09G3/30 ,  G06F3/038 ,  G09G5/00 ,  G09G5/10 ,  H04N9/64 ,  G06K9/36 ,  G06K9/46

CPC classification number: G09G3/2003 ,  G09G3/3648 ,  G09G2320/0252 ,  G09G2320/0285 ,  G09G2320/0666 ,  G09G2340/06 ,  G09G2340/16 ,  G09G2360/12

Abstract: An over-driving circuit for a display device having a display panel includes a first 4-color data generation module configured to generate output 4-color data of the previous frame based on 3-color data and a gain of the previous frame, and to generate output 4-color data of the current frame based on 3-color data and a gain of the current frame. The over-driving circuit also includes a second 4-color data generation module configured to generate input 4-color data based on input 3-color data and the gain of the current frame. The over-driving circuit further includes a data modulator configured to generate modulated data based on the output 4-color data of the previous frame, the output 4-color data of the current frame, and the input 4-color data.

Abstract translation: 具有显示面板的显示装置的过驱动电路包括：第一4色数据生成模块，被配置为基于3色数据和前一帧的增益生成前一帧的输出4色数据，并且 基于3色数据和当前帧的增益生成当前帧的输出4色数据。 过驱动电路还包括第二4色数据生成模块，其被配置为基于输入的3色数据和当前帧的增益生成输入的4色数据。 过驱动电路还包括：数据调制器，被配置为基于前一帧的输出4色数据，当前帧的输出4色数据和输入的4色数据生成调制数据。

公开(公告)号：US20130215161A1

公开(公告)日：2013-08-22

申请号：US13849212

申请日：2013-03-22

Applicant: LG DISPLAY CO., LTD.

Inventor： Byoungchul Cho ,  Kyungjoon Kwon ,  Heewon Ahn ,  Changkyun Park

IPC: G09G3/34

CPC classification number: G09G3/3406 ,  G09G3/3426 ,  G09G2320/0233 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2360/16

Abstract: A liquid crystal display includes a liquid crystal display panel, a backlight unit including a plurality of light sources, the backlight unit providing light to a back surface of the liquid crystal display panel, a backlight driving circuit that individually drives a plurality of previously determined blocks each including the light sources based on a dimming value of each of the blocks, and a local dimming control circuit that calculates a pixel gain value compensating for a luminance reduction resulting from the dimming value of each block and corrects the pixel gain value based on a grayscale saturation level of each block.

Abstract translation: 液晶显示器包括液晶显示面板，包括多个光源的背光单元，背光单元向液晶显示面板的背面提供光;背光驱动电路，分别驱动多个先前确定的块 每个块包括基于每个块的调光值的光源，以及局部调光控制电路，其计算补偿由每个块的调光值导致的亮度降低的像素增益值，并且基于 每个块的灰阶饱和度。