Patent ID: 7105368

Claim:
A method of evaluating a LCD device, comprising: a first substrate on which switching elements are formed; a second substrate on which a color layer is formed; the color layer having a red sublayer, a green sublayer, and a blue sublayer; the green sublayer being formed by a green-coloring composition; a liquid-crystal layer located between the first and second substrates; and the second substrate including no electrodes formed in such a way as to be located on a side nearer to the liquid-crystal layer with respect to the color layer; the method comprising: applying an alternating-current electric field of 100 Hz to 1 MHz to the color layer; measuring a dielectric loss factor of the color layer under the alternating-current electric field; calculating a ratio of (∈″ 100 /∈″ min ) where ∈″ 100 is a value of the dielectric loss factor at approximately 100 Hz, and ∈″ min is a minimum value of the dielectric loss factor in a range from 100 Hz to 1 MHz; and comparing the ratio of (∈″ 100 /∈″ min ) with a specific value, thereby evaluating a display quality of the device.