Method for curing seal agent

Abstract

The invention discloses a method for curing a seal agent. Before the seal agent is cured by ultraviolet rays, a non-transparent film is formed at the ultraviolet ray incidence side of a liquid crystal panel so as to replace a traditional ultraviolet ray mask. The non-transparent film is at least provided with a hollow structure which is opposite to the position of the seal agent; the ultraviolet rays can be irradiated to the seal agent at a specific angle through the hollow structure which is opposite to the position of the seal agent to realize a process for curing the seal agent. As the non-transparent film is directly formed on the liquid crystal panel, and no gaps exist between the non-transparent film and the liquid crystal panel, the phenomenon that the ultraviolet rays skew in the horizontal direction due to the distance from the ultraviolet ray mask to the liquid crystal panel can be eliminated; the total skewing amount in the horizontal direction when the ultraviolet rays are emitted into the liquid crystal panel from the ultraviolet ray mask is reduced; the possibility that display is abnormal due to the fact that the ultraviolet rays are irradiated to an effective display area is prevented, and the design difficulty of a narrow-border liquid crystal panel is lowered. Moreover, the ultraviolet ray mask is replaced by adopting the non-transparent film, so that the cost of the ultraviolet ray mask can be saved.

Description

technical field [0001] The invention relates to the field of liquid crystal module manufacturing, in particular to a method for curing a frame sealant. Background technique [0002] At present, the specific steps of the liquid crystal screen box forming process are: first, use a sealant coating device to coat the sealant around one glass substrate; then, use the drop injection method (ODF, One Drop Fill) to drop liquid crystal; after that, two glass substrates are vacuum bonded, that is, the box alignment process; finally, the sealing glue is cured: the sealing glue is partially cured by ultraviolet light (UV, Ultraviolet Rays) irradiation for a short time , into the UV curing chamber to further cure the photosensitive components in the sealant, and finally fully cure the uncured sealant in a high-temperature furnace to complete the box-forming process. [0003] Among them, the schematic diagram of the UV curing of the sealant, such as figure 1 shown, on the light-receivin...

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Problems solved by technology

[0005] However, in the design of liquid crystal panels with narrow borders, the distance between the effective display area of ​​the liquid crystal panel and the sealant is relatively close, such as figure 2 As shown, when the above-mentioned method of using UV Mask is used to cure the sealant, since the ultraviolet light has an emission angle that is offset by 15 degrees relative to the vertical direction, the distance from the UV Mask to the liquid crystal panel will cause the ultraviolet light to be in the horizontal direction. The first offset of , such as Figure 3a As shown, and the second offset of the ultraviolet light in the horizontal direction due to the internal spacing of the liquid crystal panel, such as Figure 3b shown

exist Figure 3a In the above, the distance from the UV Mask to the LCD panel is 2mm as an example. Figure 3b In the figure, the internal spacing of the LCD panel is 1.78mm as an example. It can be seen that the ultraviolet light from the emission to the irradiation of the liquid crystal panel has a total offset of 0.54mm+0.48mm=1.02mm in the horizontal direction, and the ultraviolet light is in the horizontal direction. The deviation of the direction will cause the ultraviolet light to irradiate the inside of the A-A area, which will cause abnormal display around the effective display area of ​​the liquid crystal panel; at the same time, a part of the sealant that should be irradiated by the ultraviolet light will not be irradiated, so that The curing effect of the sealant is not good, which will cause problems such as seal open (Seal Open) or liquid crystal leakage (LC Leakage)

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