Liquid crystal compositions and display panels using the same

A display panel comprising a first substrate and a second substrate disposed facing the first substrate, and a liquid crystal layer disposed between the first substrate and the second substrate, wherein a material of the liquid crystal layer comprises a liquid crystal composition comprising:

• a first compound represented by formula (I);
• a second compound represented by formula (II);
• a third compound represented by formula (III);
• and
• a fourth compound represented by formula (IV);
• wherein
• is selected from a group consisting of following substituted or unsubstituted groups:
• and substituent groups thereof are independently selected from a group consisting of F, Cl, Br, and I,
• are independently selected from a group consisting of following substituted or unsubstituted groups:
• and substituent groups thereof are independently selected from a group consisting of F, Cl, Br, and I;
• Z1 and Z2 are independently selected from a group consisting of a single bond, —O—, —S—, —SO2—, —CO—, —C(O)O—, —OC(O)—, —OC(O)O—, and —C≡C—;
• or Z1 and Z2 are independently selected from a group consisting of following substituted or unsubstituted groups:—CH2O—, —OCH2—, —CH2—CH2—, —(CH2)3—, and —CH═CH—, and substituent groups thereof are independently selected from a group consisting of F, Cl, Br, and I;
• X is selected from O or S;
• n is selected from 0, 1, or 2;
• Y is selected from
• and
• R1 to R8 are independently selected from a group consisting of —H, —F, —Cl, —Br, —I, —CN, —SCN, —NCS, and —SF;
• or, R1 to R8 are independently selected from a group consisting of a substituted or unsubstituted alkyl group having 1-15 carbon atoms, a substituted or unsubstituted alkoxy group having 1-15 carbon atoms, a substituted or unsubstituted alkenyl group having 2-15 carbon atoms, a substituted or unsubstituted alkenyloxy group having 2-15 carbon atoms, a substituted or unsubstituted alkynyl group having 2-15 carbon atoms, and a substituted or unsubstituted alkynyloxy group having 2-15 carbon atoms, and substituent groups thereof are independently selected from a group consisting of F, Cl, Br, and I.