Portable display device with graphical user interface

FIG. 1 is a front view of a portable display device with graphical user interface showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a front view of another embodiment of a portable display device with graphical user interface showing our new design;

FIG. 8 is a rear view thereof;

FIG. 9 is a top view thereof;

FIG. 10 is a left side view thereof;

FIG. 11 is a right side view thereof; and,

FIG. 12 is a bottom view thereof.

The broken lines shown in the drawings represent unclaimed portions of the portable display device with graphical user interface and form no part of the claimed design.