Liquid crystal composition and display device thereof

Abstract

The present invention discloses a liquid crystal composition, comprising: at least a first compound selected from the group consisting of a compound of general Formula I-1, a compound of general Formula I-2, and a combination thereof, and at least a second compound selected from the group consisting of a compound of general Formula II-1, a compound of general Formula II-2, a compound of general Formula II-3, a compound of general Formula II-4 and a combination thereof. The liquid crystal composition provided in the present invention has the properties of appropriate optical and dielectric anisotropies, high clearing point, existence of a nematic phase over a wide range of temperature, low viscosity and good high-temperature stability. The liquid crystal composition is applicable to a liquid crystal display (LCD) device, to enable the LCD device to have such properties as short response time, excellent display effect at high temperature, and others.

What is claimed is: 
     
       1. A liquid crystal composition, comprising:
 a first component, which comprises a compound of general Formula I-1 or a combination of the compound of the general Formula I-1 in an amount of at most 15 wt %, based on the total weight of the liquid crystal composition, and a compound of general Formula I-2 in an amount of 5-20 wt %, based on the total weight of the liquid crystal composition: 
 
       
         
           
           
               
               
           
         
       
       and
 a second component, which is one or more selected from the group consisting of a compound of general Formula II-1, a compound of general Formula II-2, a compound of general Formula II-3, a compound of general Formula II-4, and a combination thereof: 
 
       
         
           
           
               
               
           
         
         wherein: 
         R 1  and R 2  are the same or different, and each independently denote an alkyl group having 2 to 5 carbon atoms; 
         R 3 , R 5 , R 6 , R 7 , R 8 , R 9  and R 10  are the same or different, and each independently denote an alkyl or alkoxy group having 1 to 5 carbon atoms, or an alkenyl group having 2 to 5 carbon atoms; 
         R 4  denotes an alkenyl group having 2 to 5 carbon atoms; and 
         L 1  denotes H or F. 
       
     
     
       2. The liquid crystal composition according to  claim 1 , wherein the first component is one or more selected from the compounds of general Formula I-1. 
     
     
       3. The liquid crystal composition according to  claim 1 , wherein the second component comprises one or more selected from the compounds of general Formula II-1. 
     
     
       4. The liquid crystal composition according to  claim 1 , wherein the liquid crystal composition further comprising:
 a third component, which is one or more selected from the group consisting of a compound of general Formula III-1, a compound of general Formula III-2, a compound of general Formula III-3 and a combination thereof: 
 
       
         
           
           
               
               
           
         
         wherein: 
         R 11 , R 12 , R 13 , R 14 , R 15  and R 16  are the same or different, and each independently denote an alkyl group having 1 to 5 carbon atoms, or an alkenyl group having 2 to 5 carbon atoms; 
         L 2  and L 3  are the same or different, and each independently denote H or F. 
       
     
     
       5. The liquid crystal composition according to  claim 4 , wherein the third component accounts for at most 20% of the total weight of the liquid crystal composition. 
     
     
       6. The liquid crystal composition according to  claim 1 , wherein the second-component accounts for 10-90% of the total weight of the liquid crystal composition. 
     
     
       7. The liquid crystal composition according to  claim 4 , wherein the second component accounts for 10-90% of the total weight of the liquid crystal composition; and the third component accounts for at most 15% of the total weight of the liquid crystal composition. 
     
     
       8. The liquid crystal composition according to  claim 6 , wherein the first component accounts for 10-45% of the total weight of the liquid crystal composition, and the second component accounts for 55-90% of the total weight of the liquid crystal composition. 
     
     
       9. The liquid crystal composition according to  claim 7 , wherein the first component accounts for 10-45% of the total weight of the liquid crystal composition; the second component accounts for 55-90% of the total weight of the liquid crystal composition; and the third component accounts for at most 10% of the total weight of the liquid crystal composition. 
     
     
       10. The liquid crystal composition according to  claim 1 , wherein the compound of general Formula I-1 is one or more selected from the group consisting of: 
       
         
           
           
               
               
           
         
       
       and
 the compound of general Formula I-2 is one or more selected from the group consisting of: 
 
       
         
           
           
               
               
           
         
       
     
     
       11. The liquid crystal composition according to  claim 1 , wherein the compound of general Formula II-1 is one or more selected from the group consisting of: 
       
         
           
           
               
               
           
         
         the compound of general Formula II-2 is one or more selected from the group consisting of: 
       
       
         
           
           
               
               
           
         
         the compound of general Formula II-3 is one or more selected from the group consisting of: 
       
       
         
           
           
               
               
           
         
       
       and
 the compound of general Formula II-4 is one or more selected from the group consisting of: 
 
       
         
           
           
               
               
           
         
       
     
     
       12. The liquid crystal composition according to  claim 4 , wherein the compound of general Formula III-1 is one or more selected from the group consisting of: 
       
         
           
           
               
               
           
         
         the compound of general Formula III-2 is one or more selected from the group consisting of: 
       
       
         
           
           
               
               
           
         
         the compound of general Formula III-3 is one or more selected from the group consisting of: 
       
       
         
           
           
               
               
           
         
       
     
     
       13. The liquid crystal composition according to  claim 8 , wherein the first component accounts for 10-35% of the total weight of the liquid crystal composition. 
     
     
       14. The liquid crystal composition according to  claim 9 , wherein the first component accounts for 10-35% of the total weight of the liquid crystal composition. 
     
     
       15. A liquid crystal display (LCD), wherein it comprises the liquid crystal composition according to  claim 1 .