39results about How to "Suitable Dielectric Anisotropy" patented technology

The present invention provides a liquid crystal composition with positive dielectric anisotropy, comprising: one or more compounds selected from compounds expressed in general formula I, general formula II, and general formula III, and a combination thereof as a first component; one or more compounds selected from compounds expressed in general formula IV, general formula V, and general formula VI, and a combination thereof as a second component, the dielectric anisotropy of the first component being positive, and the dielectric anisotropy of the second component being negative. The liquid crystal composition not only maintains advantages such as fast response, a low drive voltage, a high clearing point, low rotary viscosity, appropriate optical anisotropy and appropriate dielectric anisotropy of IPS liquid crystal, but also significantly improves the transmittance of the liquid crystal display. Compared with existing IPS liquid crystal with positive dielectric anisotropy, the liquid crystal composition can improve the transmittance by 5 to 20%. The present invention further provides a liquid crystal display including the liquid crystal composition of the present invention and having an IPS display mode.

The invention provides a liquid crystal composition, which comprises at least a compound in a general formula I; at least a compound in a general formula II; and at least a compound selected from a general formula III-1, a general formula III-2, a general formula III-3, a general formula III-4 and its combination. The liquid crystal composition has characteristics of appropriate optical anisotropy, appropriate dielectric anisotropy and fast response speed. The invention also provides a liquid crystal display containing the liquid crystal composition.

The invention provides a negative liquid crystal composition comprising: at least one compound of general formula I as a first component; at least one compound of general formula II as a second component, and 1- 2000ppm of antistatic agent, said antistatic agent comprising at least one crown ether compound and a compound of formula V. The negative liquid crystal composition of the present invention can effectively reduce current power consumption, reduce electrostatic discharge time, and greatly reduce the risk of image sticking, uneven image display and other poor display problems. The present invention also provides a liquid crystal display comprising the negative liquid crystal composition of the present invention.

Provided is a liquid crystal composition, comprising: by weight of the total liquid crystal composition, 1-20% of the compound of formula I; 5-35% of the compound selected from a group consisting of formula II-1, formula II-2, formula II-3, and combinations thereof; 25-50% of the compound of formula III; 5-25% of the compound selected from a group consisting of formula IV-1, formula IV-2, and combinations thereof; and 5-25% of the compound selected from a group consisting of formula V-1, formula V-2, and combinations thereof. The liquid crystal composition has appropriate optical anisotropy and dielectric anisotropy, high speed of response, good low-temperature storage stability, ultraviolet irradiation resistance and heat stability, and is suitable for display modes such as IPS and FFS. Also provided is a liquid crystal display device comprising the liquid crystal composition.

The present invention provides a liquid crystal composition and a liquid crystal display device, the liquid crystal composition comprises at least one compound of general formula I, at least one compound of general formula II and at least one compound of general formula III, through these three The combination of these compounds can make the composition have better and higher optical anisotropy, dielectric anisotropy, good low temperature miscibility, and excellent resistivity and voltage retention after ultraviolet irradiation, which can be better Solve the problem of image retention. Moreover, when the polymerizable compound is polymerized in the liquid crystal composition, the polymerized particles are relatively uniform, and it is difficult to form larger polymerized particles, and no bright spots are formed in the panel of the liquid crystal display device to affect the display effect.

The invention provides a liquid crystal composition and a liquid crystal display device thereof. The liquid crystal composition comprises: at least one compound of general formula I-1 and / or general formula I-2 and at least one compound of general formula I-3 as a first component; at least one compound of general formula I-3 as a second component; a compound of general formula II; and at least one compound of general formula III as a third component. The liquid crystal composition provided by the invention has properties such as appropriately large refractive index anisotropy, suitable dielectric anisotropy, relatively high nematic temperature upper limit, and relatively fast response speed. The liquid crystal composition can be suitable for liquid crystal display, so that the liquid crystal display has characteristics such as short response time.

The invention provides a liquid crystal composition and a liquid crystal display device thereof. The liquid crystal composition comprises: the compound of general formula I accounting for 2-40% of the total weight of the liquid crystal composition; the compound of general formula II accounting for 5-30% of the total weight of the liquid crystal composition; The compound of general formula III accounting for 15-55% of the total weight; the compound of general formula IV accounting for 2-45% of the total weight of the liquid crystal composition; the compound of general formula V accounting for 0-30% of the total weight of the liquid crystal composition . The liquid crystal composition of the present invention has at least one of the characteristics of high resistivity, high voltage retention, suitable optical anisotropy, suitable dielectric anisotropy, good ultraviolet and high temperature stability, and is suitable for liquid crystal display device. The present invention also provides a liquid crystal display device comprising the liquid crystal composition.

The invention discloses a liquid-crystal composition and a display device thereof. The liquid-crystal composition comprises one or more compounds of a general formula I, one or more compounds of a general formula II, one or more compounds of a general formula II, and one or more compounds of a general formula IV. The provided liquid-crystal composition possesses the characteristics that the liquid-crystal composition possesses appropriate optical anisotropy, appropriate dielectric anisotropy, relatively high clearing points, relatively high nematic-phase temperature upper limit, relatively rapid response speed, relatively good anti-UV stability and relatively good high-temperature stability, is applicable to the liquid-crystal display device and enables the liquid-crystal display device to possess rapid response, high reliability and capability of working in a severe environment.