Patent ID: 8879027

Claim:
The liquid crystal display device comprising: at least one temperature sensor; a liquid crystal panel having a plurality of areas defined thereon, wherein the number of the plurality of areas is larger than that of the at least one temperature sensor; a memory having temperature relation information stored therein in advance, the temperature relation information representing a relation between an output value of the at least one temperature sensor and a temperature of each of the plurality of areas; a controller which receives an output value of the at least one temperature sensor and estimates, based on the temperature relation information and the received output value of the at least one temperature sensor, a temperature of each of the plurality of areas; wherein the controller uses a plurality of relation formulas defined by the temperature relation information to thereby estimate the temperature s of the plurality of areas, wherein each of the plurality of relation formulas represents the relation between the output value of the at least one temperature sensor and the temperature of each of the plurality areas, the memory has a plurality of coefficients stored therein as the temperature relation information, the plurality of coefficients being associated with the plurality of areas respectively, the plurality of relation formulas are defined by a fundamental relation formula to which the plurality of coefficients are applied, respectively, the fundamental relation formula includes, as its variables, a latest output value of the at least one temperature sensor and a value based on a preceding output value of the at least one temperature sensor, and the fundamental relations formula includes Infinite Impulse Response Filter function which includes, as its variable, the value based on the preceding output value of the at least one temperature sensor.