Liquid crystal medium composite as well as liquid crystal display using same and manufacturing method of liquid crystal medium composite

Abstract

The invention provides a liquid crystal medium composite as well as a liquid crystal display using the liquid crystal medium composite and a manufacturing method of the liquid crystal medium composite. The liquid crystal medium composite comprises the following components: a liquid crystal material, a polymerizable monomer, a stabilizing agent and a sensitizing agent, wherein the sensitizing agent has strong absorption on ultraviolet light with the wavelength in a range of 300-380 nm; and the structure is formed by connecting a polycyclic aromatic hydrocarbon formed by connecting a plurality of benzene rings, with an aromatic ring. The liquid crystal display comprises an upper substrate, a lower substrate and the liquid crystal medium composite, wherein the upper substrate and the lower substrate are arranged in parallel; and the liquid crystal medium composite is arranged between the upper substrate and the lower substrate. According to the invention, the stabilizing agent which has the strong absorption on the ultraviolet light with the wavelength in the range of 300-380 nm is used so that a reaction wavelength of the polymerizable monomer can be moved towards a long wavelength; the ultraviolet light with the wavelength in the range of 300-380 nm is used for irradiating to keep away from the absorption wave section of a liquid crystal material, so that the damage effect on the liquid crystal material and an alignment material PI (Polyimide) by the ultraviolet light is reduced, and the polymerization reaction efficiency and the uniformity of the polymerizable monomer can be improved.

Description

technical field [0001] The invention relates to liquid crystal display technology, in particular to a liquid crystal medium composition, a liquid crystal display using the liquid crystal display and a manufacturing method thereof. Background technique [0002] In the LCD industry, the PSVA (Polymer stabilized vertical alignment) technology developed in recent years has many advantages compared with the traditional TN / STN technology, such as wide viewing angle, high contrast, and fast response. Compared with other VA technologies, such as MVA and PVA Technology also has considerable advantages in penetration rate and process simplicity, so PSVA has become a major mainstream technology in the TFT-LCD industry today. [0003] In the key process of PSVA: Negative liquid crystal material is used. When no electric field is applied, the liquid crystal molecules are arranged perpendicular to the surface of the substrate. A certain amount of monomer that can undergo polymerization re...

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Problems solved by technology

However, there are some problems in the direct use of UV light to make these RMs react: the main wavelength range that can cause the photopolymerization of RMs containing the above-mentioned groups is 200-300nm, although ultraviolet light with a wavelength exceeding 300nm can also cause RMs to react , but the efficiency is very low, the speed is very slow, and it does not have good mass production, so a light source with a wavelength below 300nm must be used to illuminate the panel to make RM react

However, the use of light sources below 300nm will bring many disadvantages and difficulties to the production of panels: First, ultraviolet light below 300nm has high energy, which will cause price reduction and damage to the alignment layer material polyimide (Polyimide) and liquid crystal molecules. It causes the VHR (Voltage holding ratio) of the panel to decrease, Image sticking (affecting residue) to become serious, and RA (Reliability analysis) results to deteriorate, etc.; secondly, the glass used to make TFT-LCD substrates is usually suitable for the Ultraviolet light below 300nm has a certain absorption effect, which will reduce the irradiation efficiency of the light source; what is more fatal is that the liquid crystal material itself has a strong absorption effect on ultraviolet light below 300nm, and ultraviolet light with a wavelength below 300nm cannot pass through the liquid crystal material at all. , that is to say, most of the ultraviolet light from the light source is absorbed by the liquid crystal material (playing a destructive role), and only a very small part is absorbed by the RM to undergo polymerization reaction, which occurs at a very shallow position on the light-incident side, which in turn leads to light-incident The inhomogeneity of the RM reaction between the side and the backlight side reduces the alignment effect of the panel

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