公开(公告)号：US08976192B2

公开(公告)日：2015-03-10

申请号：US13178106

申请日：2011-07-07

申请人： Pei-Chen Huang ,  Yu-Chung Lee ,  Shih-Yu Hsu ,  Po-Yang Wu

发明人： Pei-Chen Huang ,  Yu-Chung Lee ,  Shih-Yu Hsu ,  Po-Yang Wu

IPC分类号： G09G3/30 ,  G09G5/02 ,  G09G3/34

CPC分类号： G09G3/3406 ,  G09G2320/066 ,  G09G2360/16

摘要： A contrast control device is provided. The device of the invention includes a detecting unit, a judging unit, a backlight control unit, a gain generating unit and a contrast gain processing unit. The detecting unit calculates an average value and detects a maximum value of a current image. The judging unit generates a gain index and a brightness index according to the average value. The backlight control unit generates a backlight control signal according to the brightness index. The gain generating unit generates a first contrast gain value and a soft-clamping gain value according to the gain index, the average value and the maximum value and then selects one from the first contrast gain value and the soft-clamping gain value for output as a second contrast gain value according to an input pixel value of the current image. The contrast gain processing unit generates an output pixel value according to the second contrast gain value and the input pixel value.

摘要翻译： 提供对比度控制装置。 本发明的装置包括检测单元，判断单元，背光控制单元，增益生成单元和对比度增益处理单元。 检测单元计算平均值并检测当前图像的最大值。 判断单元根据平均值生成增益指标和亮度指标。 背光控制单元根据亮度指标生成背光控制信号。 增益产生单元根据增益指数，平均值和最大值产生第一对比度增益值和软钳位增益值，然后从第一对比增益值和软钳位增益值中选择一个作为输出， 根据当前图像的输入像素值的第二对比度增益值。 对比增益处理单元根据第二对比度增益值和输入像素值生成输出像素值。

公开(公告)号：US20120007880A1

公开(公告)日：2012-01-12

申请号：US13178106

申请日：2011-07-07

申请人： Pei-Chen HUANG ,  Yu-Chung Lee ,  Shih-Yu Hsu ,  Po-Yang Wu

发明人： Pei-Chen HUANG ,  Yu-Chung Lee ,  Shih-Yu Hsu ,  Po-Yang Wu

IPC分类号： G09G5/00

CPC分类号： G09G3/3406 ,  G09G2320/066 ,  G09G2360/16

摘要： A contrast control device is provided. The device of the invention includes a detecting unit, a judging unit, a backlight control unit, a gain generating unit and a contrast gain processing unit. The detecting unit calculates an average value and detects a maximum value of a current image. The judging unit generates a gain index and a brightness index according to the average value. The backlight control unit generates a backlight control signal according to the brightness index. The gain generating unit generates a first contrast gain value and a soft-clamping gain value according to the gain index, the average value and the maximum value and then selects one from the first contrast gain value and the soft-clamping gain value for output as a second contrast gain value according to an input pixel value of the current image. The contrast gain processing unit generates an output pixel value according to the second contrast gain value and the input pixel value.

摘要翻译： 提供对比度控制装置。 本发明的装置包括检测单元，判断单元，背光控制单元，增益生成单元和对比度增益处理单元。 检测单元计算平均值并检测当前图像的最大值。 判断单元根据平均值生成增益指标和亮度指标。 背光控制单元根据亮度指标生成背光控制信号。 增益产生单元根据增益指数，平均值和最大值产生第一对比度增益值和软钳位增益值，然后从第一对比增益值和软钳位增益值中选择一个作为输出， 根据当前图像的输入像素值的第二对比度增益值。 对比增益处理单元根据第二对比度增益值和输入像素值生成输出像素值。