BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
FIG. 1A is a cross-sectional view of a conventional portable electronic device.
FIG. 1B is a diagram of the top casing in FIG. 1A along line A-A.
FIG. 2A is a cross-sectional view of a portable electronic device according to an embodiment of the present invention.
FIG. 2B is a diagram of the first casing in FIG. 2A along line B-B.
FIG. 3 is a diagram of a portable electronic device according to another embodiment of the present invention.