Case for portable display device

FIG. 1 is a top front perspective view of a case for portable display device in an open position showing the claimed design;

FIG. 2 is a bottom rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is an enlarged left side view thereof;

FIG. 8 is an enlarged right side view thereof;

FIG. 9 is a front view thereof showing the case for portable display device in a closed position;

FIG. 10 is an enlarged bottom view in two parts; and,

FIG. 11 is an enlarged top view in two parts.

The dashed broken lines in the figures show portions of the case for portable display device that form no part of the claimed design.

The dot-dash broken lines in the figures show boundaries that form no part of the claimed design.

The shade lines in the figures show contour or transparency and not surface ornamentation.