UV pattern forming method using inkjet printing, bezel manufacturing method including same, and bezel manufactured according thereto

#This application is a national phase entry under 35 U.S.C. § 371 of International Application No. PCT/KR2017/009365, filed Aug. 28, 2017, which claims priority to Korean Patent Application No. 10-2016-0167971, filed Dec. 9, 2016, the disclosures of which are incorporated herein by reference.

#The present invention relates to a method for forming a UV pattern using inkjet printing, a method for manufacturing a bezel comprising the same, and a bezel manufactured thereby. More specifically, it relate to a method for forming a UV pattern using inkjet printing, which enables to form a hairline or pattern having metallic luster in a single inkjet patterning process, a method for manufacturing a bezel comprising the same, and a bezel manufactured thereby.

#A bezel, which is a non-display area, exists on the cover window of a display device such as a smart phone or a tablet PC. The bezel is formed with a printed layer of various colors such as black and white for providing a sense of aesthetics. But it has a disadvantage of flat external design. In the prior art, in order to enhance the aesthetic design of the product, a UV pattern layer is formed by a UV molding method, a reflective pattern layer for realizing a metallic feeling is formed on the UV pattern layer by a vapor deposition process, and then a printed layer for realizing colors is formed thereon. Thereby, hairlines and patterns having various designs and metallic luster are formed on the printed layer.

#FIG. 1 is a sectional side view of a conventional bezel.

#FIG. 2 is a schematic view of a process for manufacturing a bezel including a UV pattern and a printed layer formed with a black ink, according to one embodiment of the present invention.

#FIG. 3 is a schematic view of a process for manufacturing a bezel including a UV pattern and a printed layer formed with a color or white ink, according to other embodiment of the present invention.

#The present invention will now be described in detail.

#The method for forming a UV pattern using inkjet printing according to the present invention comprises the steps of: a) inkjet printing an ultraviolet curable ink containing metal particles on a non-display area of a cover window for a display to form a UV pattern; and b) curing the UV pattern.

#The metal particles, which are contained in the ultraviolet curable ink, are used for imparting metallic luster to the UV pattern formed by the inkjet printing or patterning. The metal particles can be used without limitations as long as they are ordinary metals having luster. Examples thereof include aluminum (Al), silver (Ag), copper (Cu), nickel (Ni), cobalt (Co), iron (Fe), etc. The size of the metal particles is 50 to 1,000 nm, preferably 100 to 800 nm, and more preferably 200 to 500 nm. If the size of the metal particles is less than 50 nm, the reflection effect may be deteriorated, and the UV pattern may not be visually recognized. If the size of the metal particles exceeds 1,000 nm, the nozzle of the inkjet head may be clogged and the performance of process may be deteriorated.