Method for making phosphor ink and system using the same

#1. Field of the Invention

#The present invention relates to phosphor ink, and in particular to a method for making phosphor ink and a system using the same.

#2. Description of the Related Art

#The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

#In the drawings:

#FIG. 1 shows a method for making phosphor ink in accordance with the conventional art;

#Hereinafter, a method for making phosphor ink and a system using the same capable of dispersing phosphor particles quickly and uniformly, increasing a quantity of light generated in the phosphor by removing the surface defect layers and increasing luminance of a PDP (plasma display panel) by repeatedly performing a process for dispersing phosphor particles mixed in a slurry with ultrasonic vibrations in a high frequency band and a process for removing surface defect layers formed on the surfaces of the phosphor particles with ultrasonic vibrations in a low frequency band will be described with reference to FIGS. 4˜5B.

#FIG. 4 shows a system using a method for making phosphor ink in accordance with the present invention.

#As depicted in FIG. 4, the system using the method for making phosphor ink in accordance with the present invention includes a control unit 40 for generating an electric signal having a high frequency signal or an electric signal having a low frequency signal; a piezoelectric element 50 for generating ultrasonic vibrations in a high frequency band or ultrasonic vibrations in a low frequency band by the electric signal having a high frequency signal or the electric signal having a low frequency signal; and a dispersing container 60 for containing a slurry in which phosphor particles are mixed. Herein, the piezoelectric element is installed at the dispersing container, and surface defect layers 20 formed on the phosphor particles in the slurry in the dispersing container 60 are removed by ultrasonic vibrations in a low frequency band generated by the piezoelectric element 50. In addition, the phosphor particles mixed in the slurry are dispersed quickly and uniformly by ultrasonic vibrations in a high frequency band generated by the piezoelectric element 50.