公开(公告)号：US08363003B2

公开(公告)日：2013-01-29

申请号：US12289212

申请日：2008-10-22

申请人： Kyung-Joon Kwon ,  Hee-Won Ahn ,  Sung-Soo Kim

发明人： Kyung-Joon Kwon ,  Hee-Won Ahn ,  Sung-Soo Kim

IPC分类号： G09G3/36

CPC分类号： G09G3/3406 ,  G09G3/3611 ,  G09G2320/0646 ,  G09G2330/021 ,  G09G2360/16

摘要： A method of driving a liquid crystal display device includes inputting source image data, each of which has one of m gray level values, wherein m is a natural number, defining T error data from the source image data, wherein the error data have top k gray level values, and T and k are a natural number, generating conversion image data having larger gray level values than the source image data using one having a largest gray level value from the source image data excluding the error data, inputting the conversion image data to a liquid crystal panel, controlling a brightness of a backlight unit in accordance with the conversion image data, forming a bitmap corresponding to the conversion image data, wherein the bitmap shows positional distribution of pixels with the error data, counting error areas by scanning the bitmap, wherein each of the error areas includes the predetermined number of the pixels having the error data, and controlling the T according to the number of the error.

公开(公告)号：US20090109170A1

公开(公告)日：2009-04-30

申请号：US12289212

申请日：2008-10-22

申请人： Kyung-Joon Kwon ,  Hee-Won Ahn ,  Sung-Soo Kim

发明人： Kyung-Joon Kwon ,  Hee-Won Ahn ,  Sung-Soo Kim

IPC分类号： G09G3/36

CPC分类号： G09G3/3406 ,  G09G3/3611 ,  G09G2320/0646 ,  G09G2330/021 ,  G09G2360/16

摘要： A method of driving a liquid crystal display device includes inputting source image data, each of which has one of m gray level values, wherein m is a natural number, defining T error data from the source image data, wherein the error data have top k gray level values, and T and k are a natural number, generating conversion image data having larger gray level values than the source image data using one having a largest gray level value from the source image data excluding the error data, inputting the conversion image data to a liquid crystal panel, controlling a brightness of a backlight unit in accordance with the conversion image data, forming a bitmap corresponding to the conversion image data, wherein the bitmap shows positional distribution of pixels with the error data, counting error areas by scanning the bitmap, wherein each of the error areas includes the predetermined number of the pixels having the error data, and controlling the T according to the number of the error.

摘要翻译： 驱动液晶显示装置的方法包括输入源图像数据，每个源图像数据具有m个灰度值中的一个，其中m是自然数，其中源自源图像数据定义了T个误差数据，其中误差数据具有顶部k 灰度值，T和k是自然数，使用来自除了错误数据的源图像数据具有最大灰度值的一个，生成具有比源图像数据更大灰度值的转换图像数据，输入转换图像数据 根据转换图像数据控制背光单元的亮度，形成与转换图像数据相对应的位图，其中位图显示具有误差数据的像素的位置分布，通过扫描来计算误差区域 位图，其中每个错误区域包括具有错误数据的预定数量的像素，并且根据错误的数量来控制T。

公开(公告)号：US08654052B2

公开(公告)日：2014-02-18

申请号：US13177964

申请日：2011-07-07

申请人： Jung-Hwan Lee ,  Kyung-Joon Kwon ,  Dong-Woo Kim ,  Hee-Won Ahn

发明人： Jung-Hwan Lee ,  Kyung-Joon Kwon ,  Dong-Woo Kim ,  Hee-Won Ahn

IPC分类号： G09G3/36

CPC分类号： G09G3/3426 ,  G09G3/3648 ,  G09G2320/0646 ,  G09G2320/066 ,  G09G2360/16

摘要： The present invention provides method and device for driving local dimming in a liquid crystal display device which enables adaptive application of a gradation roll-off according to an image characteristic. The method for driving local dimming in a liquid crystal display device includes the steps of determining a local dimming value of each light emitting block by analyzing a received image data light emitting block by light emitting block of a backlight unit, producing a pixel compensating coefficient on a light quantity change of each pixel by using the local dimming value of each light emitting block, producing a required gradient value by compensating the received image data by using the pixel compensating coefficient, and producing maximum required gradient values for one frame and an average value of the maximum required gradient values for one frame, determining a roll-off end point of a gradient roll-off section according to the maximum required gradient value, and determining a roll-off starting point of the gradient roll-off section according to the average of the maximum required gradient values, setting a gradient change curve of the gradient roll-off section by using the roll-off starting point and end point, and producing a gain value of each pixel from the gradient change curve, and forwarding an output gradient value by correcting the required gradient value by using the gain value of each pixel.

摘要翻译： 本发明提供一种用于驱动液晶显示装置中的局部调光的方法和装置，其能够根据图像特性自动应用渐变滚降。 用于驱动液晶显示装置中的局部调光的方法包括以下步骤：通过背光单元的发光块分析接收的图像数据发光块来确定每个发光块的局部调光值，产生像素补偿系数 通过使用每个发光块的局部调光值，每个像素的光量变化，通过使用像素补偿系数补偿接收到的图像数据并产生一帧的最大所需梯度值并产生平均值，产生所需的梯度值 的一帧的最大所需梯度值，根据最大所需梯度值确定梯度滚降部分的滚降终点，并根据所述梯度滚降部分的滚降起点确定 最大所需梯度值的平均值，通过使用滚动设置梯度滚降部分的梯度变化曲线 离开起点和终点，并从梯度变化曲线产生每个像素的增益值，并通过使用每个像素的增益值校正所需的梯度值来转发输出梯度值。

公开(公告)号：US20110141154A1

公开(公告)日：2011-06-16

申请号：US12853811

申请日：2010-08-10

申请人： Hee-Won Ahn ,  Hee-Jung Hong ,  Kyung-Joon Kwon ,  Dong-Woo Kim

发明人： Hee-Won Ahn ,  Hee-Jung Hong ,  Kyung-Joon Kwon ,  Dong-Woo Kim

IPC分类号： G09G5/10 ,  G09G3/36

CPC分类号： G09G3/3426 ,  G02F2001/133601 ,  G09G2320/064 ,  G09G2320/0646

摘要： Disclosed herein is a local dimming driving method and device of an LCD device, which is capable of minimizing luminance deviation at the same gray scale due to a dimming difference between blocks. The local dimming driving method of the LCD device includes analyzing input image data in units of blocks and determining a local dimming value per block, performing spatial filtering with respect to the local dimming value per block, repeating spatial filtering by a predetermined repeat count, and controlling luminance of a backlight unit on a block-by-block basis using the local dimming value per block controlled by spatial filtering.

摘要翻译： 这里公开了一种LCD装置的局部调光驱动方法和装置，其能够由于块之间的调光差异而使相同灰度处的亮度偏差最小化。 LCD装置的局部调光驱动方法包括以块为单位分析输入图像数据，并确定每块的局部调光值，对每块的局部调光值进行空间滤波，以预定的重复计数重复空间滤波，以及 使用每个由空间滤波控制的块的局部调光值逐块地控制背光单元的亮度。

公开(公告)号：US08427419B2

公开(公告)日：2013-04-23

申请号：US12853811

申请日：2010-08-10

申请人： Hee-Won Ahn ,  Hee-Jung Hong ,  Kyung-Joon Kwon ,  Dong-Woo Kim

发明人： Hee-Won Ahn ,  Hee-Jung Hong ,  Kyung-Joon Kwon ,  Dong-Woo Kim

IPC分类号： G09G3/36 ,  G09G5/10 ,  G09F13/08

CPC分类号： G09G3/3426 ,  G02F2001/133601 ,  G09G2320/064 ,  G09G2320/0646

摘要： Disclosed herein is a local dimming driving method and device of an LCD device, which is capable of minimizing luminance deviation at the same gray scale due to a dimming difference between blocks. The local dimming driving method of the LCD device includes analyzing input image data in units of blocks and determining a local dimming value per block, performing spatial filtering with respect to the local dimming value per block, repeating spatial filtering by a predetermined repeat count, and controlling luminance of a backlight unit on a block-by-block basis using the local dimming value per block controlled by spatial filtering.

摘要翻译： 这里公开了一种LCD装置的局部调光驱动方法和装置，其能够由于块之间的调光差异而使相同灰度处的亮度偏差最小化。 LCD装置的局部调光驱动方法包括以块为单位分析输入图像数据，并确定每块的局部调光值，对每块的局部调光值进行空间滤波，以预定的重复计数重复空间滤波，以及 使用每个由空间滤波控制的块的局部调光值逐块地控制背光单元的亮度。

公开(公告)号：US20120056907A1

公开(公告)日：2012-03-08

申请号：US13177964

申请日：2011-07-07

申请人： Jung-Hwan Lee ,  Kyung-Joon Kwon ,  Dong-Woo Kim ,  Hee-Won Ahn

发明人： Jung-Hwan Lee ,  Kyung-Joon Kwon ,  Dong-Woo Kim ,  Hee-Won Ahn

IPC分类号： G09G5/10 ,  G09G3/36

CPC分类号： G09G3/3426 ,  G09G3/3648 ,  G09G2320/0646 ,  G09G2320/066 ,  G09G2360/16

摘要： The present invention provides method and device for driving local dimming in a liquid crystal display device which enables adaptive application of a gradation roll-off according to an image characteristic. The method for driving local dimming in a liquid crystal display device includes the steps of determining a local dimming value of each light emitting block by analyzing a received image data light emitting block by light emitting block of a backlight unit, producing a pixel compensating coefficient on a light quantity change of each pixel by using the local dimming value of each light emitting block, producing a required gradient value by compensating the received image data by using the pixel compensating coefficient, and producing maximum required gradient values for one frame and an average value of the maximum required gradient values for one frame, determining a roll-off end point of a gradient roll-off section according to the maximum required gradient value, and determining a roll-off starting point of the gradient roll-off section according to the average of the maximum required gradient values, setting a gradient change curve of the gradient roll-off section by using the roll-off starting point and end point, and producing a gain value of each pixel from the gradient change curve, and forwarding an output gradient value by correcting the required gradient value by using the gain value of each pixel.

摘要翻译： 本发明提供一种用于驱动液晶显示装置中的局部调光的方法和装置，其能够根据图像特性自动应用渐变滚降。 用于驱动液晶显示装置中的局部调光的方法包括以下步骤：通过背光单元的发光块分析接收到的图像数据发光块来确定每个发光块的局部调光值，产生像素补偿系数 通过使用每个发光块的局部调光值，每个像素的光量变化，通过使用像素补偿系数补偿接收到的图像数据并产生一帧的最大所需梯度值并产生平均值，产生所需的梯度值 的一帧的最大所需梯度值，根据最大所需梯度值确定梯度滚降部分的滚降终点，并根据所述梯度滚降部分的滚降起点确定 最大所需梯度值的平均值，通过使用滚动设置梯度滚降部分的梯度变化曲线 离开起点和终点，并从梯度变化曲线产生每个像素的增益值，并通过使用每个像素的增益值校正所需的梯度值来转发输出梯度值。

公开(公告)号：US09087485B2

公开(公告)日：2015-07-21

申请号：US12962710

申请日：2010-12-08

申请人： Hee-Won Ahn ,  Si-Hoon Lee ,  Kyung-Joon Kwon ,  Kyo-Hyuck Choo

发明人： Hee-Won Ahn ,  Si-Hoon Lee ,  Kyung-Joon Kwon ,  Kyo-Hyuck Choo

IPC分类号： G09G3/36 ,  G09G3/34

CPC分类号： G09G3/3426 ,  G09G3/3648 ,  G09G2320/0242 ,  G09G2320/0646 ,  G09G2330/021 ,  G09G2360/16

摘要： Disclosed herein is a local dimming driving method and device of a Liquid Crystal Display (LCD) device, which is capable of preventing color change due to gray scale saturation when data is compensated while enabling local dimming. The local dimming driving method of the LCD device includes detecting maximum values per pixel from input image data, analyzing the maximum values per pixel on a block-by-block basis, and determining local dimming values per block according to the analysis result, calculating a first gain value using the local dimming values per block, calculating a maximum gain value per pixel using the maximum value per pixel as a second gain value, selecting a smaller value of the first and second gain values as a final gain value, compensating the input image data using the final gain value, and controlling luminance of a backlight unit on the block-by-block basis using the local dimming value per block.

摘要翻译： 这里公开了一种液晶显示器（LCD）器件的局部调光驱动方法和装置，其能够在数据被补偿同时实现局部调光的同时防止灰度饱和引起的颜色变化。 LCD装置的局部调光驱动方法包括从输入图像数据检测每像素的最大值，逐块分析每像素的最大值，并根据分析结果确定每个块的局部调光值，计算 使用每块的局部调光值计算第一增益值，使用每像素的最大值计算每像素的最大增益值作为第二增益值，将第一和第二增益值的较小值选择为最终增益值，补偿输入 使用最终增益值的图像数据，并且使用每个块的局部调光值逐块地控制背光单元的亮度。

公开(公告)号：US08760385B2

公开(公告)日：2014-06-24

申请号：US13178006

申请日：2011-07-07

申请人： Kyung-Joon Kwon ,  Dong-Woo Kim ,  Hee-Won Ahn ,  Jung-Hwan Lee

发明人： Kyung-Joon Kwon ,  Dong-Woo Kim ,  Hee-Won Ahn ,  Jung-Hwan Lee

IPC分类号： G09G3/36 ,  G09G3/34

CPC分类号： G09G3/3426 ,  G09G2320/0646

摘要： A liquid crystal display device capable of improving a contrast ratio and of reducing a halo phenomenon with low power consumption and a method for local dimming driving the same are disclosed. A method for local dimming driving a liquid crystal display includes determining a local dimming value for each of light-emitting blocks based on analyzing input image data by the unit of light-emitting block provided in a backlight unit; determining a halo degree by analyzing a total light quantity of black pixels having black gradations in the input image data; adjusting the number of spatial filtering repetitions based on the determined halo degree; compensating the local dimming value by performing spatial filtering for the local dimming value an adjusted number of times; and controlling brightness of the backlight unit for each of the blocks by using the compensated local dimming value.

摘要翻译： 公开了能够提高对比度和降低功耗低的光晕现象的液晶显示装置及其局部调光方法。 驱动液晶显示器的局部调光方法包括：基于设置在背光单元中的发光块单元分析输入图像数据，确定每个发光块的局部调光值; 通过分析输入图像数据中具有黑色渐变的黑色像素的总光量来确定光晕度; 基于确定的光晕度来调整空间滤波重复的数量; 通过对局部调光值进行调整次数的空间滤波来补偿局部调光值; 以及通过使用补偿的局部调光值来控制每个块的背光单元的亮度。

公开(公告)号：US08576159B2

公开(公告)日：2013-11-05

申请号：US12827498

申请日：2010-06-30

申请人： Dae-Ho Cho ,  Kyung-Joon Kwon ,  Hee-Won Ahn ,  Chang-Kyun Park

发明人： Dae-Ho Cho ,  Kyung-Joon Kwon ,  Hee-Won Ahn ,  Chang-Kyun Park

IPC分类号： G09G3/36 ,  G09G5/10

CPC分类号： G09G3/3426 ,  G09G2320/064 ,  G09G2320/0646

摘要： A driving method for local dimming of a Liquid Crystal Display (LCD) device and an apparatus using the same are disclosed. The driving method includes measuring light intensities at a plurality of sampling points by driving a light source of a backlight unit and storing the light intensity measurements as light intensity data of the sampling points in a memory, determining a local dimming value of each block by analyzing input image data on a block basis, detecting a pixel position of current input data, selecting a plurality of sampling points adjacent to the current pixel and the light intensity data of the sampling points from the memory, detecting light intensity data of the current pixel by linearly interpolating the light intensity data of the sampling points individually, calculating a gain value by a light intensity analysis based on the light intensity data of the current pixel and the local dimming value of each block, compensating the current input data using the gain value, and controlling luminance of the backlight unit on a block basis using the local dimming value of each block.

摘要翻译： 公开了一种用于液晶显示器（LCD）器件的局部调光的驱动方法及其使用方法。 驱动方法包括通过驱动背光单元的光源并将光强度测量值作为采样点的光强度数据存储在存储器中来测量多个采样点的光强度，通过分析来确定每个块的局部调光值 以块为基础输入图像数据，检测当前输入数据的像素位置，从存储器中选择与当前像素相邻的多个采样点和采样点的光强数据，检测当前像素的光强度数据，检测当前像素的光强度数据 分别对采样点的光强度数据进行线性内插，通过基于当前像素的光强度数据和每个块的局部调光值的光强度分析来计算增益值，使用增益值补偿当前输入数据， 以及使用每个块的局部调光值在块基础上控制背光单元的亮度。

公开(公告)号：US20110141077A1

公开(公告)日：2011-06-16

申请号：US12827498

申请日：2010-06-30

申请人： Dae-Ho CHO ,  Kyung-Joon Kwon ,  Hee-Won Ahn ,  Chang-Kyun Park

发明人： Dae-Ho CHO ,  Kyung-Joon Kwon ,  Hee-Won Ahn ,  Chang-Kyun Park

IPC分类号： G09G3/36 ,  G09G5/10

CPC分类号： G09G3/3426 ,  G09G2320/064 ,  G09G2320/0646

摘要： A driving method for local dimming of a Liquid Crystal Display (LCD) device and an apparatus using the same are disclosed. The driving method includes measuring light intensities at a plurality of sampling points by driving a light source of a backlight unit and storing the light intensity measurements as light intensity data of the sampling points in a memory, determining a local dimming value of each block by analyzing input image data on a block basis, detecting a pixel position of current input data, selecting a plurality of sampling points adjacent to the current pixel and the light intensity data of the sampling points from the memory, detecting light intensity data of the current pixel by linearly interpolating the light intensity data of the sampling points individually, calculating a gain value by a light intensity analysis based on the light intensity data of the current pixel and the local dimming value of each block, compensating the current input data using the gain value, and controlling luminance of the backlight unit on a block basis using the local dimming value of each block.

摘要翻译： 公开了一种用于液晶显示器（LCD）器件的局部调光的驱动方法及其使用方法。 驱动方法包括通过驱动背光单元的光源并将光强度测量值作为采样点的光强度数据存储在存储器中来测量多个采样点的光强度，通过分析来确定每个块的局部调光值 以块为基础输入图像数据，检测当前输入数据的像素位置，从存储器中选择与当前像素相邻的多个采样点和采样点的光强数据，检测当前像素的光强度数据，检测当前像素的光强度数据 分别对采样点的光强度数据进行线性内插，通过基于当前像素的光强度数据和每个块的局部调光值的光强度分析来计算增益值，使用增益值补偿当前输入数据， 以及使用每个块的局部调光值在块基础上控制背光单元的亮度。