Frame glue and its preparation method and narrow frame liquid crystal display device

Abstract

The invention provides a frame adhesive, a preparation method and a narrow-frame liquid crystal display device thereof. The frame adhesive is prepared from a crosslinking agent, aphoto-initiator, epoxy resin oligomers, an acrylic monomer, a curing agent, a coupling agent, a defoaming agent, a plasticizer and white carbon black, and the structural formula of the crosslinking agent is shown in the description. By adding the crosslinking agent, on one hand, the crosslinking agent can react with non-cyclized amido in polyimide during heat curing of the frame adhesive to form chemical bond, on the other hand, the crosslinking agent can promote cross-linking reaction of the epoxy resin oligomers in the frame adhesive, the self strength of an adhesive material is strengthened, and finally the purpose of increasing the bonding power between the frame adhesive and a polyimide material is achieved. The preparation method of the frame adhesive is simple in preparation process, the prepared frame adhesive has strong bonding power with the polyimide material. The narrow-frame liquid crystal display device contains the frame adhesive, and the bonding and sealing effect between a TFT substrate and a CF substrate is better.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a sealant, a preparation method thereof, and a narrow-frame liquid crystal display device. Background technique [0002] With the development of display technology, liquid crystal displays (Liquid Crystal Display, LCD) and other flat display devices are widely used in mobile phones, televisions, personal Various consumer electronic products such as digital assistants, digital cameras, notebook computers, and desktop computers have become the mainstream of display devices. [0003] Most of the liquid crystal display devices currently on the market are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module. Usually, the liquid crystal display panel consists of a color filter substrate (CF, Color Filter), a thin film transistor substrate (TFT, Thin Film Transistor), a liquid crystal (LC, Liquid Crystal) sandwiched between the ...

AI Technical Summary

Problems solved by technology

[0005] like figure 1 As shown, in a common liquid crystal display device, the sealant 400 adheres the indium tin oxide (ITO) material 300 on the edge region of the TFT / CF substrate 100 , and the sealant 400 and the polymer on the TFT / CF substrate 100 The distance between the imide (PI) alignment films 500 is 1000 μm to 5000 μm, but for some narrow-frame liquid crystal display devices, due to the need to increase the display area, polyimide is usually integrated on the TFT / CF substrate 100 Surface coating, the formed polyimide alignment film 500 covers the indium tin oxide material 300 in the edge region of the TFT / CF substrate 100, so when the sealant 400 is applied to the TFT / CF substrate 100, The object changes from the indium tin oxide material 300 to the polyimide alignment film 500 (such as figure 2 As shown), due to the different material properties of polyimide and indium tin oxide, the adhesive force between the sealant 400 and the polyimide alignment film 500 is poor, which ultimately leads to poor packaging effect of the liquid crystal display panel

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