Patent ID: 7773259

Claim:
A hue adjusting device, an image signal being inputted to a display system, the image signal being composed of N pixels, N being a natural number, each of the N pixels of the image signal being converted to the one comprising a first color component and a second color component, the hue adjusting device being used to adjust a hue angle of the i-th pixel of the image signal, i being an integer index ranging from 1 to N, the hue angle being obtained by converting the first color component and the second color component, and the hue adjusting device comprising: a first memory unit for storing a first look-up table, the first look-up table recording a plurality of hue angles, a plurality of adjusting parameters, and a plurality of rotation angles, each of the rotation angles being corresponding to one of the hue angles and one of the adjusting parameters respectively, and the plurality of hue angles also being divided into a plurality of color axes; a second memory unit for storing a second look-up table; a first processing unit for downloading a plurality of corresponding rotation angles from the first look-up table to the second look-up table according to a user-selected color axis and a user-selected adjusting parameter, wherein the user-selected color axis is the one selected from the color axes, and the user-selected adjusting parameter is the one selected from the adjusting parameters of the first look-up table; and a second processing unit for retrieving a rotation angle from the second look-up table according to the hue angle of the i-th pixel and for readjusting the first color component and the second color component of the i-th pixel, such that the hue angle of the i-th pixel is readjusted.