The sensor 143 may be positioned adjacent to the wheel 153. For example, the sensor 143 may be a photo sensor. The sensor 143 may detect the rotation of the wheel 153. A controller may consider 360 degrees to be one turn. Accordingly, even when the display device is rebooted after the wheel 153 is rotated to a certain angle, the controller may identify the certain angle to which the wheel 153 had been rotated.

Referring to FIG. 16, the head 60 may include the back cover 40; 40′. The head 60 may be inclined with respect to the stand 50 (see FIGS. 6 and 7) by means of a tilt assembly 200 to be described later. Here, the head 60 may be rotated about an axis parallel to the lateral direction or the first direction DR1.

A bracket 51 may be fixed to the stand 50 (see FIGS. 6 and 7). The tilt assembly 200 may be detachably coupled to the bracket 51 through a hole 60H formed in the back cover 40; 40′.

Referring to FIGS. 17 and 18, the bracket 51 may include a body 510, which is configured to have a plate shape overall. The bracket 51 may include reinforcing portions 512, which project forwards from the body 510. The body 510 may have formed therein holes h12, through which fastening elements fastened to the stand 50 (see FIGS. 6 and 7) extend.