摘要 |
There is provided a liquid crystal display device which prevents a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) therein and which overcomes problems of defective display such as voids, uneven alignment, and screen burn-in. The liquid crystal display device prevents a decrease in the voltage holding ratio (VHR) of a liquid crystal layer and an increase in ion density (ID) therein and reduces defective display such as screen burn-in; hence, such a liquid crystal display device is particularly useful as liquid crystal display devices of a VA mode and PSVA mode which involve active matrix driving and can be applied to the liquid crystal display devices of liquid crystal TV sets, monitors, mobile phones, and smartphones. |
代理机构 |
Westerman, Hattori, Daniels & Adrian, LLP |
代理人 |
Westerman, Hattori, Daniels & Adrian, LLP |
主权项 |
1. A liquid crystal display device comprising a first substrate, a second substrate, a liquid crystal composition layer disposed between the first substrate and the second substrate, a color filter including a black matrix and at least RGB three-color pixels, a pixel electrode, and a common electrode, wherein
the liquid crystal composition layer contains a liquid crystal composition containing a compound represented by General Formula (I) in an amount of 30 to 50% (where R1 and R2 each independently represent an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms; and A represents a 1,4-phenylene group or a trans-1,4-cyclohexylene group), a compound represented by General Formula (II-1) in an amount of 5 to 30% (where R3 represents an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms; R4 represents an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 4 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or an alkenyloxy group having 3 to 8 carbon atoms; and Z3 represents a single bond, —CH═CH—, —C≡C—, —CH2CH2—, —(CH2)4—, —COO—, —OCH2—, —CH2O—, —OCF2—, or —CF2O—), and a compound represented by General Formula (II-2) in an amount of 25 to 45% (where R5 represents an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 2 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or an alkenyloxy group having 2 to 8 carbon atoms; R6 represents an alkyl group having 1 to 8 carbon atoms, an alkenyl group having 4 to 8 carbon atoms, an alkoxy group having 1 to 8 carbon atoms, or an alkenyloxy group having 3 to 8 carbon atoms; B represents a 1,4-phenylene group or trans-1,4-cyclohexylene group which is optionally substituted with a fluorine atom; and Z4 represents a single bond, —CH═CH—, —C≡C—, —CH2CH2—, —(CH2)4—, —COO—, —OCH2—, —CH2O—, —OCF2—, or —CF2O—); and the color filter contains an organic pigment, wherein among whole particles of the organic pigment, particles having a particle size greater than 1000 nm have a volume fraction of not more than 1%, and particles having a particle size ranging from 40 nm to 1000 nm have a volume fraction of not more than 25%. |