Patent ID: 7586498

Claim:
A color temperature conversion method for a color temperature conversion apparatus, comprising a plurality of storage units, controlling color temperatures of an image display device by comparing a user-set color temperature and each of a plurality of basic color temperatures provided by the image display device and then compensating for a color temperature of an input pixel based on comparison results, the color temperature conversion method comprising: calculating variables for determining a conversion range, the conversion range being represented by a quadratic curve; determining whether, based on the calculated variables, the input pixel is to be color-temperature-converted by determining whether the input pixel is within the conversion range; receiving the user-set color temperature and comparing the user-set color temperature with basic color temperatures of the image display device if the input pixel is to be color-temperature converted; calculating color coordinates of a target point, based on the user-set color temperature, if there are no matches for the user-set color temperature and the basic color temperatures, and calculating the color coordinates of the target point based on one of the plurality of basic color temperatures, if there is a match with the user-set color temperature and the one basic color temperature; and converting the color temperature of the input pixel by moving the input pixel and a reference point of the conversion range, in a direction same as the reference point to the target point in an amount proportional to a displacement of the reference point, so that the input pixel can be automatically moved along with the reference point of the conversion range.