Housing of an led display device and method for manufacturing the same

Abstract

A method for manufacturing a housing of an LED display device includes the steps of: (a) filling a first material into a first mold assembly at a first place to form a cover with a plurality of first display holes, followed by moving the cover to a second place, filling a second material into a second mold assembly and the cover to seal one of the plurality of the first display holes via a plurality of first transparent members; and (b) disposing an ink layer on a display side of the cover in such a manner that the ink layer covers the display side of the cover and that the first transparent member in each of the first display holes is exposed from the ink layer.

What is claimed is: 
     
         1 . A method for manufacturing a housing of an LED display device, comprising the steps of:
 (a) injection molding a cover that is formed with a plurality of through holes, followed by injection molding a plurality of transparent members in each of the through holes using a spin double injection machine;   (b) disposing an ink layer on a display side of the cover and an outer surface of the transparent member in each of the through holes using an ink disposing machine; and   (c) laser engraving a part of the ink layer covering the transparent members so as to forma specific light transparent pattern using a laser engraving machine.   
     
     
         2 . The method as claimed in  claim 1 , wherein, in step (a), the cover is injection molded using a first mold assembly at a first place, followed by moving the cover to a second place where a second mold assembly is provided and injection molding one of the transparent members in a corresponding one of the through holes using the second mold assembly. 
     
     
         3 . The method as claimed in  claim 2 , wherein the cover has a back side opposite to the display side and a lateral side interconnecting the display and back sides, in step (a), the first mold assembly including a movable mold, a first stationary mold and a core mold extending through the movable mold, the movable mold, the first stationary mold and the core mold cooperatively defining the first formation cavity, filling the first material into the first formation cavity through a sprue channel of the first stationary mold to form the cover, abutting against the display side and the lateral side of the cover via the movable mold, moving the cover along with the movable mold of the first mold assembly to the second place where the movable mold cooperates with the second mold assembly to clamp the cover therebetween, the second mold assembly including a plurality of protrusion molds respectively extending into the through holes of the cover, filling the second material into a respective one of the through holes through a sprue channel of the protrusion molds of the second mold assembly. 
     
     
         4 . The method as claimed in  claim 3 , wherein, in step (a), the second mold assembly further has a second stationary mold to cover the back side of the cover and the movable mold, and at least one molding projection extending through the movable mold oppositely of the second stationary mold, the molding projection having a forming surface that faces a respective one of the through holes and that is co-planar with the display side of the cover such that an outer surface of each of the transparent members in the through holes is flush with the display side of the display cover. 
     
     
         5 . A housing of an LED display device, comprising:
 a cover having a display side that is formed with a plurality of first through holes;   a first transparent member disposed in said first through holes and having an outer surface that is indented from said display side of said cover; and   an ink layer covering said display side of said cover without extending to said first transparent member.   
     
     
         6 . The housing as claimed in  claim 5 , wherein said cover is further formed with a second through hole, said housing further comprising a second transparent member disposed in said second through hole and having an outer surface that is flush with said display side of said cover, said ink layer covering said display side of said cover and a part of said outer surface of said second transparent member. 
     
     
         7 . The housing as claimed in  claim 6 , wherein a specific light transparent pattern is formed on the said ink layer via a laser engraving process. 
     
     
         8 . The housing as claimed in  claim 6 , wherein said first and second through holes are bounded by a hole wall including a non-diverging portion that is directly and perpendicularly connected to said display side of said cover, and a tapered portion that is tapered from said non-diverging portion away from said display side. 
     
     
         9 . The housing as claimed in  claim 8 , wherein said hole wall further including a horizontal portion that extends horizontally from an end of the tapered portion. 
     
     
         10 . The housing as claimed in  claim 5 , wherein said first through hole is bounded by a hole wall including a non-diverging portion that is directly and perpendicularly connected to said display side of said cover, and a tapered portion that is tapered from said non-diverging portion away from said display side. 
     
     
         11 . The housing as claimed in  claim 10 , wherein said hole wall further including a horizontal portion that extends horizontally from an end of the tapered portion.