LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE

• US 20180148649A1
• Filed: 11/28/2017
• Published: 05/31/2018
• Est. Priority Date: 11/29/2016
• Status: Active Grant

• Current Assignee: JNC Corporation (Chisso Corporation), JNC Petrochemical Corporation (Chisso Corporation)
• Original Assignee: JNC Corporation (Chisso Corporation), JNC Petrochemical Corporation (Chisso Corporation)
• Inventors: SAITO, Masayuki
• Granted Patent: US 10,519,376 B2
• Time in Patent Office: Days
• CPC Class Codes: C09K 19/0208 Twisted Nematic (T.N.); Super Twisted Nematic (S.T.N.); Optical Mode Interference (O.M.I.)
• CPC Class Codes: C09K 19/0216 Super Birefringence Effect (S.B.E.); Electrically Controlled Birefringence (E.C.B.)
• CPC Class Codes: C09K 19/2007 the chain containing -COO- or -OCO- groups
• CPC Class Codes: C09K 19/2021 Compounds containing at least one asymmetric carbon atom
• CPC Class Codes: C09K 19/3066 in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
• CPC Class Codes: C09K 19/3068 chain containing -COO- or -OCO- groups
• CPC Class Codes: C09K 19/44 containing compounds with benzene rings directly linked
• CPC Class Codes: C09K 19/46 containing esters
• CPC Class Codes: C09K 19/54 Additives having no specific mesophase characterised by their chemical composition
• CPC Class Codes: C09K 2019/0466 the linking chain being a -CF2O- chain
• CPC Class Codes: C09K 2019/122 Ph-Ph
• CPC Class Codes: C09K 2019/123 Ph-Ph-Ph
• CPC Class Codes: C09K 2019/2035 Ph-COO-Ph
• CPC Class Codes: C09K 2019/3016 Cy-Ph-Ph
• CPC Class Codes: C09K 2019/3025 Cy-Ph-Ph-Ph
• CPC Class Codes: C09K 2019/3075 Cy-COO-Ph
• CPC Class Codes: C09K 2019/3422 the heterocyclic ring being a six-membered ring

Abstract

Provided are a liquid crystal composition satisfying at least one of characteristics such as high maximum temperature, low minimum temperature, small viscosity, suitable optical anisotropy, large dielectric anisotropy and high stability to ultraviolet light, or having a suitable balance regarding at least two of the characteristics, and an AM device including the composition.

The liquid crystal composition contains a quencher as an additive, and may contain a specific compound having large positive dielectric anisotropy as a first component, a specific compound having high maximum temperature or small viscosity as a second component, or a specific compound having large negative dielectric anisotropy as a third component.

Claims

1. A liquid crystal composition that contains a compound represented by formula (1) as an additive, and has a nematic phase and positive dielectric anisotropy:

2. The liquid crystal composition according to claim 1, wherein a proportion of the additive is in the range from 0.005% by weight to 2% by weight.

3. The liquid crystal composition according to claim 1, containing at least one compound selected from the group of compounds represented by formula (2) as a first component:

4. The liquid crystal composition according to claim 3, containing at least one compound selected from the group of compounds represented by formula (2-1) to formula (2-35) as the first component:

5. The liquid crystal composition according to claim 3, wherein a proportion of the first component is in the range from 10% by weight to 85% by weight.

6. The liquid crystal composition according to claim 1, containing at least one compound selected from the group of compounds represented by formula (3) as a second component:

7. The liquid crystal composition according to claim 6, containing at least one compound selected from the group of compounds represented by formula (3-1) to formula (3-13) as the second component:

8. The liquid crystal composition according to claim 6, wherein a proportion of the second component is in the range from 10% by weight to 85% by weight.

9. The liquid crystal composition according to claim 3, containing at least one compound selected from the group of compounds represented by formula (3) as a second component:

10. The liquid crystal composition according to claim 1, containing at least one compound selected from the group of compounds represented by formula (4) as a third component:

11. The liquid crystal composition according to claim 10, containing at least one compound selected from the group of compounds represented by formula (4-1) to formula (4-22) as the third component:

12. The liquid crystal composition according to claim 10, wherein a proportion of the third component is in the range from 3% by weight to 25% by weight.

13. The liquid crystal composition according to claim 3, containing at least one compound selected from the group of compounds represented by formula (4) as a third component:

14. The liquid crystal composition according to claim 6, containing at least one compound selected from the group of compounds represented by formula (4) as a third component:

15. The liquid crystal composition according to claim 9, containing at least one compound selected from the group of compounds represented by formula (4) as a third component:

16. The liquid crystal composition according to claim 1, wherein a maximum temperature of a nematic phase is 70°

C. or higher, an optical anisotropy measured at 25°

C. at a wavelength of 589 nanometers is 0.07 or more, and a dielectric anisotropy measured at 25°

C. at a frequency of 1 kHz is 2 or more.

17. A liquid crystal display device including the liquid crystal composition according to claim 1.

18. The liquid crystal display device according to claim 17, wherein an operating mode in the liquid crystal display device is a TN mode, an ECB mode, an OCB mode, an IPS mode, an FFS mode or an FPA mode, and a driving mode in the liquid crystal display device is an active matrix mode.