公开(公告)号：US08957880B2

公开(公告)日：2015-02-17

申请号：US12491334

申请日：2009-06-25

申请人： Kazuhiko Tanaka ,  Yasutaka Tsuru ,  Yuya Ogi

发明人： Kazuhiko Tanaka ,  Yasutaka Tsuru ,  Yuya Ogi

IPC分类号： G06F3/038 ,  G09G5/00 ,  G09G3/36 ,  F21V7/04 ,  G09G3/34

CPC分类号： G09G3/342 ,  G09G3/36 ,  G09G2320/0233 ,  G09G2320/062

摘要： In a local dimming technology for reducing power consumption of a display device using a backlight as in a liquid crystal display, the backlight is configured by a plurality of independently controllable light sources, an image is divided into areas of the same number as that of the controllable light sources and light emission intensity of the light source is calculated based on a feature value of each area. However, this technology has a problem that when a backlight luminance distribution within each area is not uniform, image quality is deteriorated or a power consumption reduction effect is lowered.In the present invention, the image is divided into areas of the number greater than that of the controllable light sources, and the light emission intensity of each light source is determined based on the feature values of a plurality of areas to reduce the above-described problem.

摘要翻译： 在用于降低液晶显示器中使用背光的显示装置的功耗的局部调光技术中，背光由多个可独立控制的光源构成，图像被划分为与 基于每个区域的特征值计算可控光源和光源的发光强度。 然而，该技术存在的问题是，当各区域内的背光亮度分布不均匀时，图像质量劣化或降低功耗降低效果。 在本发明中，将图像分割为比可控光源大的数量的区域，并且基于多个区域的特征值来确定每个光源的发光强度，以减少上述 问题。

公开(公告)号：US20100045694A1

公开(公告)日：2010-02-25

申请号：US12491334

申请日：2009-06-25

申请人： Kazuhiko Tanaka ,  Yasutaka Tsuru ,  Yuya Ogi

发明人： Kazuhiko Tanaka ,  Yasutaka Tsuru ,  Yuya Ogi

IPC分类号： G09G3/36 ,  G09G5/02

CPC分类号： G09G3/342 ,  G09G3/36 ,  G09G2320/0233 ,  G09G2320/062

摘要： In a local dimming technology for reducing power consumption of a display device using a backlight as in a liquid crystal display, the backlight is configured by a plurality of independently controllable light sources, an image is divided into areas of the same number as that of the controllable light sources and light emission intensity of the light source is calculated based on a feature value of each area. However, this technology has a problem that when a backlight luminance distribution within each area is not uniform, image quality is deteriorated or a power consumption reduction effect is lowered.In the present invention, the image is divided into areas of the number greater than that of the controllable light sources, and the light emission intensity of each light source is determined based on the feature values of a plurality of areas to reduce the above-described problem.

摘要翻译： 在用于降低液晶显示器中使用背光的显示装置的功耗的局部调光技术中，背光由多个可独立控制的光源构成，图像被划分为与 基于每个区域的特征值计算可控光源和光源的发光强度。 然而，该技术存在的问题是，当各区域内的背光亮度分布不均匀时，图像质量劣化或降低功耗降低效果。 在本发明中，将图像分割为比可控光源大的数量的区域，并且基于多个区域的特征值来确定每个光源的发光强度，以减少上述 问题。

公开(公告)号：US20110057961A1

公开(公告)日：2011-03-10

申请号：US12785242

申请日：2010-05-21

申请人： Yasutaka Tsuru ,  Yuya Ogi ,  Kazuhiko Tanaka

发明人： Yasutaka Tsuru ,  Yuya Ogi ,  Kazuhiko Tanaka

IPC分类号： G09G5/10 ,  G09G3/36

CPC分类号： G09G3/342 ,  G09G2310/0232 ,  G09G2320/0233 ,  G09G2320/0271 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2330/021

摘要： In a liquid crystal device, an in-region gradation value detection section detects gradation levels of input video signals on every sub-region, removing gradation levels of pixels within a predetermined upper range (m %) from the brightest gradation level in the sub-region to detect the maximum in-region gradation level Pa. A boundary gradation value detecting section removes gradation levels for pixels within a predetermined upper range (n %) from the brightest gradation level for pixel groups belonging to the region boundary portion in the sub-region to detect the maximum boundary gradation level Pb. A backlight control value deciding section selects higher one of the level Pa and the level Pb as the maximum gradation level Pc in the sub-region, and decides a backlight control value K based on the ratio between the level Pc and the upper limit value Pmax of the gradation level.

摘要翻译： 在液晶装置中，区域内灰度值检测部检测各子区域的输入图像信号的灰度等级，从子区域中的最亮灰度级除去规定的上限（m％）以内的像素的灰度等级， 区域，以检测最大区域内灰度级Pa。边界灰度值检测部分从属于子区域灰度级中的区域边界部分的像素组的最亮灰度级除去预定上限范围（n％）内的像素的灰度级， 区域以检测最大边界灰度级Pb。 背光源控制值判定部选择电平Pa和电平Pb中的较高的一个作为子区域中的最大灰度级Pc，并且基于电平Pc与上限值Pmax之间的比率来决定背光控制值K 的灰度级。

公开(公告)号：US20110249039A1

公开(公告)日：2011-10-13

申请号：US13079076

申请日：2011-04-04

申请人： Yuya OGI ,  Yasutaka Tsuru ,  Kazuhiko Tanaka

发明人： Yuya OGI ,  Yasutaka Tsuru ,  Kazuhiko Tanaka

IPC分类号： G09G5/10

CPC分类号： G09G3/3426 ,  G09G3/3611 ,  G09G2320/0233 ,  G09G2320/062 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2330/021 ,  G09G2360/16

摘要： In a liquid-crystal display device including an edge-light-scheme-employed backlight device, it is implemented to reduce its power consumption while maintaining its excellent picture-quality. The present invention is applied to the backlight device with a plurality of edge-light-scheme backlight cells in a matrix-like manner including a LED light-source, and a light-guiding plate for emitting light. The intensity of light from a backlight cell positioned at a screen's peripheral portion is so controlled as to be made lower than the intensity of light from a backlight cell at a central portion. The light intensity of a backlight cell having a LED light-source adjacent to a first edge portion of the illumination surface of the backlight device is so controlled as to be made higher than the light intensity of a backlight cell adjacent to a second edge portion opposed to the first edge portion.

摘要翻译： 在包括边缘照明方案的背光装置的液晶显示装置中，实现了降低其功耗，同时保持其优异的图像质量。 本发明以包括LED光源的矩阵状方式和用于发光的导光板应用于具有多个边缘光方案背光单元的背光装置。 来自位于屏幕周边部分的背光单元的光的强度被控制得低于在中心部分来自背光单元的光的强度。 具有与背光装置的照明面的第一边缘部相邻的LED光源的背光单元的光强度被控制为高于与相对的第二边缘部相邻的背光单元的光强度 到第一边缘部分。

公开(公告)号：US20110157247A1

公开(公告)日：2011-06-30

申请号：US12963342

申请日：2010-12-08

申请人： Kazuhiko TANAKA ,  Yasutaka Tsuru ,  Yuya Ogi

发明人： Kazuhiko TANAKA ,  Yasutaka Tsuru ,  Yuya Ogi

IPC分类号： G09G5/10 ,  G09G3/36

CPC分类号： G09G3/3426 ,  G09G2320/0276 ,  G09G2320/028 ,  G09G2320/0646 ,  G09G2320/0653 ,  G09G2320/068 ,  G09G2330/021 ,  G09G2354/00 ,  G09G2360/16

摘要： An image display device using the area control method for eliminating irregularities as seen from the side and also capable of lowering power consumption. The degree of flatness indicating the image flatness of an image in each image area is calculated, and in areas that are flat the light source luminance is set high in order to lessen irregularities as seen from the side; and in areas that are not flat the irregularities are difficult to perceive as seen from the side so an effect that cuts power consumption is obtained without having to correct the light source luminance.

摘要翻译： 一种图像显示装置，其使用区域控制方法来消除从侧面观察的不规则性并且还能够降低功耗。 计算出每个图像区域中的图像的平坦度的平坦度，并且在平坦的区域中，为了减轻从侧面看的不规则性，将光源亮度设置得较高; 并且在不平坦的区域中，不方便从侧面观察到难以察觉的情况，从而在不必校正光源亮度的情况下获得削减功耗的效果。

公开(公告)号：US09047829B2

公开(公告)日：2015-06-02

申请号：US12781239

申请日：2010-05-17

申请人： Kazuhiko Tanaka ,  Yasutaka Tsuru ,  Yuya Ogi

发明人： Kazuhiko Tanaka ,  Yasutaka Tsuru ,  Yuya Ogi

IPC分类号： G09G3/34 ,  G02F1/1335

CPC分类号： G09G3/3426 ,  G02F1/1336 ,  G02F2001/133601 ,  G09G2320/0238 ,  G09G2320/0247 ,  G09G2320/0646 ,  G09G2330/021

摘要： An image display apparatus includes a dimming value determination circuit for determining a dimming value of a backlight based on an input image signal, an image signal compensation circuit for compensating the input image signal supplied to a liquid crystal panel in accordance with the dimming value, and a backlight drive circuit for driving and controlling the backlight in accordance with the dimming value. When the light emitting luminance of the present frame of the backlight increases relative to the light emitting luminance of the previous frame, the backlight drive circuit delays the timing for applying the dimming value of the present frame. This makes it possible to reduce power consumption of the backlight by suppressing deterioration in the image quality in spite of the sharp change in the display image luminance.

摘要翻译： 图像显示装置包括：调光值确定电路，用于基于输入图像信号确定背光的调光值;图像信号补偿电路，用于根据调光值补偿提供给液晶面板的输入图像信号;以及 用于根据调光值驱动和控制背光的背光驱动电路。 当背光的当前帧的发光亮度相对于前一帧的发光亮度增加时，背光驱动电路延迟了施加当前帧的调光值的定时。 这使得可以通过抑制显示图像亮度的急剧变化来抑制图像质量的劣化来降低背光的功耗。

公开(公告)号：US08823633B2

公开(公告)日：2014-09-02

申请号：US13079076

申请日：2011-04-04

申请人： Yuya Ogi ,  Yasutaka Tsuru ,  Kazuhiko Tanaka

发明人： Yuya Ogi ,  Yasutaka Tsuru ,  Kazuhiko Tanaka

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

CPC分类号： G09G3/3426 ,  G09G3/3611 ,  G09G2320/0233 ,  G09G2320/062 ,  G09G2320/064 ,  G09G2320/0646 ,  G09G2330/021 ,  G09G2360/16

摘要： In a liquid-crystal display device including an edge-light-scheme-employed backlight device, it is implemented to reduce its power consumption while maintaining its excellent picture-quality. The present invention is applied to the backlight device with a plurality of edge-light-scheme backlight cells in a matrix-like manner including a LED light-source, and a light-guiding plate for emitting light. The intensity of light from a backlight cell positioned at a screen's peripheral portion is so controlled as to be made lower than the intensity of light from a backlight cell at a central portion. The light intensity of a backlight cell having a LED light-source adjacent to a first edge portion of the illumination surface of the backlight device is so controlled as to be made higher than the light intensity of a backlight cell adjacent to a second edge portion opposed to the first edge portion.

摘要翻译： 在包括边缘照明方案的背光装置的液晶显示装置中，实现了降低其功耗，同时保持其优异的图像质量。 本发明以包括LED光源的矩阵状方式和用于发光的导光板应用于具有多个边缘光方案背光单元的背光装置。 来自位于屏幕周边部分的背光单元的光的强度被控制得低于在中心部分来自背光单元的光的强度。 具有与背光装置的照明面的第一边缘部相邻的LED光源的背光单元的光强度被控制为高于与相对的第二边缘部相邻的背光单元的光强度 到第一边缘部分。

公开(公告)号：US08451212B2

公开(公告)日：2013-05-28

申请号：US12963342

申请日：2010-12-08

申请人： Kazuhiko Tanaka ,  Yasutaka Tsuru ,  Yuya Ogi

发明人： Kazuhiko Tanaka ,  Yasutaka Tsuru ,  Yuya Ogi

IPC分类号： G09G3/3406

CPC分类号： G09G3/3426 ,  G09G2320/0276 ,  G09G2320/028 ,  G09G2320/0646 ,  G09G2320/0653 ,  G09G2320/068 ,  G09G2330/021 ,  G09G2354/00 ,  G09G2360/16

摘要： An image display device using the area control method for eliminating irregularities as seen from the side and also capable of lowering power consumption. The degree of flatness indicating the image flatness of an image in each image area is calculated, and in areas that are flat the light source luminance is set high in order to lessen irregularities as seen from the side; and in areas that are not flat the irregularities are difficult to perceive as seen from the side so an effect that cuts power consumption is obtained without having to correct the light source luminance.

摘要翻译： 一种图像显示装置，其使用区域控制方法来消除从侧面观察的不规则性并且还能够降低功耗。 计算出每个图像区域中的图像的平坦度的平坦度，并且在平坦的区域中，为了减轻从侧面看的不规则性，将光源亮度设置得较高; 并且在不平坦的区域中，不方便从侧面观察到难以察觉的情况，从而在不必校正光源亮度的情况下获得削减功耗的效果。

公开(公告)号：US08896638B2

公开(公告)日：2014-11-25

申请号：US13088207

申请日：2011-04-15

申请人： Hiroyuki Kurabayashi ,  Yasutaka Tsuru ,  Yuya Ogi ,  Kazuhiko Tanaka ,  Akihiro Shiraishi

发明人： Hiroyuki Kurabayashi ,  Yasutaka Tsuru ,  Yuya Ogi ,  Kazuhiko Tanaka ,  Akihiro Shiraishi

IPC分类号： G09G5/10 ,  G09G3/34

CPC分类号： G09G3/3426 ,  G09G2320/0233 ,  G09G2320/0238 ,  G09G2320/0606 ,  G09G2320/0646 ,  G09G2320/0653 ,  G09G2360/16

摘要： An initial light control value calculation section calculates the backlight's initial light control value K0 according to brightness of an inputted image signal for each area. A black area measurement section measures a black area S by obtaining ratio of the number of pixels satisfying Y≦Y0 (Y: brightness signal level, Y0: black level threshold) in the screen. A minimum light control value output section determines a minimum light control value Kmin based on comparison between the measured black area S and a black area threshold S0 and outputs a maximum value permissible for the light control value as the value Kmin when the black area S is the threshold value S0 or less. An LED control signal calculation section outputs a control signal to LED light sources based on a light control value K1 as the higher one of K0 and Kmin.

摘要翻译： 初始光控制值计算部根据每个区域的输入图像信号的亮度来计算背光源的初始光控制值K0。 黑色区域测量部通过获得满足Y＆nlE; Y0（Y：亮度信号电平，Y0：黑色电平阈值））的像素数的比例来测量黑色区域S. 最小光控制值输出部根据被测量的黑色区域S和黑色区域阈值S0之间的比较来确定最小光控制值Kmin，并且当黑色区域S为黑色区域S时，将控制值允许的最大值作为值Kmin输出 阈值S0以下。 LED控制信号计算部基于作为K0和Kmin中较高者的光控制值K1将控制信号输出到LED光源。

公开(公告)号：US20110267379A1

公开(公告)日：2011-11-03

申请号：US13088207

申请日：2011-04-15

申请人： Hiroyuki KURABAYASHI ,  Yasutaka Tsuru ,  Yuya Ogi ,  Kazuhiko Tanaka ,  Akihiro Shiraishi

发明人： Hiroyuki KURABAYASHI ,  Yasutaka Tsuru ,  Yuya Ogi ,  Kazuhiko Tanaka ,  Akihiro Shiraishi

IPC分类号： G09G5/10

CPC分类号： G09G3/3426 ,  G09G2320/0233 ,  G09G2320/0238 ,  G09G2320/0606 ,  G09G2320/0646 ,  G09G2320/0653 ,  G09G2360/16

摘要： An initial light control value calculation section calculates the backlight's initial light control value K0 according to brightness of an inputted image signal for each area. A black area measurement section measures a black area S by obtaining ratio of the number of pixels satisfying Y≦Y0 (Y: brightness signal level, Y0: black level threshold) in the screen. A minimum light control value output section determines a minimum light control value Kmin based on comparison between the measured black area S and a black area threshold S0 and outputs a maximum value permissible for the light control value as the value Kmin when the black area S is the threshold value S0 or less. An LED control signal calculation section outputs a control signal to LED light sources based on a light control value K1 as the higher one of K0 and Kmin.

摘要翻译： 初始光控制值计算部根据每个区域的输入图像信号的亮度来计算背光源的初始光控制值K0。 黑色区域测量部通过获得满足Y＆nlE; Y0（Y：亮度信号电平，Y0：黑色电平阈值））的像素数的比例来测量黑色区域S. 最小光控制值输出部根据被测量的黑色区域S和黑色区域阈值S0之间的比较来确定最小光控制值Kmin，并且当黑色区域S为黑色区域S时，将控制值允许的最大值作为值Kmin输出 阈值S0以下。 LED控制信号计算部基于作为K0和Kmin中较高者的光控制值K1将控制信号输出到LED光源。