Patent ID: 8183758

Claim:
A liquid crystal display device comprising a white light source having a blue phosphor, a green phosphor, and a red phosphor and having a light-on state and a light-off state in a single frame; and a liquid crystal display panel which controls an amount of transmitted light from the white light source for each pixel and which has a color filter for allowing any of blue light, green light, and red light to be transmitted therethrough for each pixel, wherein the green phosphor is a phosphor mixture prepared by mixing at least two types of green phosphors different in host type-composition, at least two type of green phosphors being a first green phosphor and a second green phosphor, respectively, with all of the green phosphors contained in the phosphor mixture having the same element as a luminescence center; a molar ratio of the first green phosphor: the second green phosphor is from 0.9:0.1 to 0.7:0.3, wherein the first green phosphor has a high response time, a period of time required for a brightness for the first green phosphor to rise from 0% to 90% due to an electric power supply and a period of time required for the brightness of the first green phosphor to fall from 100% to 10% due to an electric power supply is less than 4 msec; wherein the second green phosphor has a response time slower than the first green phosphor, a period of time required for a brightness of the second green phosphor to rise from 0% to 90% due to an electric power supply and a period of time required for the brightness of the second green phosphor to fall from 100% to 10% due to an electric power supply are at least 4 msec; wherein when the phosphor mixture has the greatest brightness of 100%, both a period of time required for a brightness of the phosphor mixture to rise from 0% to 90% due to an electric power supply and a period of time required for the brightness of the phosphor mixture to fall from 100% to 10% due to an electric power supply are 4 msec or less.