Patent ID: 7505085
Filing Date: 2009-03-17
Classification: G09G

Abstract:
1. An image display device, comprising: a memory for storing a reference brightness value and a mapping table, the reference brightness value being a predetermined value for determining whether to adjust a dark region of an original luminance, chrominance of blue component, and chrominance of red component (YUV) format image, the adjustment of the dark region being determined by comparing the reference brightness value with an average brightness value of the entire original YUV format image, the mapping table being used to obtain a brightness mapping value corresponding to each brightness value of pixels of the original YUV format image when the adjustment of the dark region is determined; a controller for converting an original red, green, and blue (RGB) format image into the original YUV format image, calculating the average brightness value of the entire original YUV format image, determining whether the average brightness value is less than the reference brightness value, mapping the brightness value of each pixel of the original YUV format image into a corresponding brightness mapping value of the mapping table when the average brightness value is less than the reference brightness value, and converting the converted YUV format image into a converted RGB format image; and a display means comprising a liquid crystal display (LCD) for displaying the converted RGB format image.