Patent ID: 7317436

Claim:
A liquid crystal display device, comprising: a liquid crystal display panel having an effective area and a non-display area; and a temperature sense pattern provided, within the non-display area of the liquid crystal display panel, wherein the temperature sense pattern is connected to a current detection system wherein a first side of the temperature sense pattern receives a DC (Direct Current) constant voltage from an external source, and a second side of the temperature sense pattern produces a current value, wherein the current detection system is connected to a controller of the liquid crystal display panel, wherein the controller measures a temperature corresponding to the current value produced by the current detection system having a relationship of: T = 1 α ⁢ ( 1 ρ 0 ⁢ A l ⁢ V I - 1 ) , wherein “V” is the DC constant voltage supplied to the temperature sense pattern, “A” is an area of the temperature sense pattern, “l” is a length of the temperature sense pattern, “I” is the produced current value, “α” is a linear resistivity coefficient, and “ρ 0 ” is a resistivity of the temperature sense pattern at a temperature of 0° C.