Patent ID: 8493305
Filing Date: 2013-07-23
Classification: G09G

Abstract:
1. A display device comprising: an image processing unit which performs image processing of input image data, a display panel which is driven by output image data from said image processing unit, a backlight which illuminates said display panel, and a backlight control unit which controls said backlight on the basis of an image adjustment parameter from said image processing unit; wherein said image processing unit is configured to generate the image adjustment parameter by lowering a chroma value of the input image data on the basis of a chroma coefficient which is externally set, wherein said image processing unit includes a chroma control unit is configured to: (a) receive the input image data, (b) convert the input image data into first image data comprising a first chroma value and a first luminance value, (c) generate a second chroma value by lowering the first chroma value on the basis of the chroma coefficient that is externally set, and (d) convert the second chroma value and the first luminance value into second image data, and output the second image data, and wherein said image processing unit further includes an input data processing unit which generates pixel information from the second image data output from said chroma control unit, a histogram coefficient unit which generates a histogram by counting the pixel information, an image adjustment parameter generation unit coupled to the backlight control unit, which generates the image adjustment parameter for adjusting luminance of the backlight via the backlight control unit on the basis of frequencies from said histogram coefficient unit, and an image expansion unit which discards a first part of the input image data, comprising gray level data exceeding the image adjustment parameter, by using the image adjustment parameter, and which expands a second part of the input image data, other than the first part, to full scale to generate the output image data to drive the display panel.