Patent ID: 7616214

Claim:
A method of generating characteristic data of illumination around an image display device, comprising: obtaining predetermined illumination characteristic data of illumination around the image display device, either using a measurement sensor or directly from a user via an interface; and making the predetermined illumination characteristic data into a data format comprising a type block and an illuminance block, wherein the type block indicates information on a type of illumination, and the illuminance block indicates information on the illuminance of illumination, the information on the type of illumination comprising at least one of a color temperature of illumination which is expressed by an 8-bit quantization value and a coordinate value having the range of [0,1] in Chromaticity coordinates of illumination, and the information on the illuminance of illumination being a numerical illuminance value which is represented in the units of Lux and has a value equal to or greater than 0, and wherein the type block comprises: a flag to indicate whether data in a type payload is a color temperature value or a chromaticity coordinate value.