embodiments of the present invention will be described more fully hereinafter with reference to the accompanying drawings , in which exemplary embodiments of the invention are shown . as those skilled in the art would realize , the described embodiments may be modified in various different ways , all without departing from the spirit or scope of the present invention . it shall be noted that the drawings are schematic and do not necessarily depict exact dimensions . the relative proportions and ratios of elements in the drawings may be exaggerated or diminished in size for the sake of clarity and / or convenience , and such arbitrary proportions are intended only to be illustrative , and are not intended to be limiting in any way . like reference numerals are used for like structures , elements , or parts shown in two or more drawings to show similar characteristics . when one part is said to be “ over ” or “ on ” another part , the one part may be directly over the other part or may be accompanied by one or more other parts interposed therebetween . the drawings specifically show exemplary embodiments of the present invention . as a result , various modifications of the drawings in accordance with the present invention are anticipated . accordingly , exemplary embodiments are not limited to certain forms of the regions illustrated , but may include forms that are modified due to manufacturing , for example . hereinafter , a running machine 101 according to an exemplary embodiment of the present invention will be described with reference to fig1 to fig4 . as shown in fig1 and fig2 , the running machine 101 according to the present exemplary embodiment includes a rotator 200 , a display unit 100 , and a support 500 , which may include two or more individual supports . the rotator 200 is in the shape of a hollow cylinder , which is set on the side of the cylinder when the rotator 200 is upright , and has a diameter that is greater than the height of an intended user , and also has a constant thickness ( e . g ., a width , or a geometric height of the cylinder ). a user may walk or run on the running machine 101 by stepping on an interior of the rotator 200 with his foot ( e . g ., at a point higher than the lowest point of the rotator 200 ). the rotator 200 of the present embodiment is formed of a transparent material . for example , the rotator 200 may be formed of glass or plastic . the display unit 100 is formed in the shape of a hollow cylinder corresponding to the shape of the rotator 200 ( e . g ., the display unit 100 may have a slightly larger inner diameter than an outer diameter of the rotator 200 ). in addition , the display unit 100 is arranged to overlap ( e . g ., encircle ) the rotator 200 and to be positioned on an exterior of the rotator 200 . that is , the interior circumference of the display unit 100 is located outside of the external circumference of the rotator 200 . in addition , as shown in fig3 , the display unit 100 and the rotator 200 are spaced from each other . the display unit 100 displays an image in a direction toward an interior of the cylinder that is the display unit 100 . further , the display unit 100 includes an organic light emitting element ( e . g ., a plurality of organic light emitting elements ). that is , the display unit 100 may be a flexible organic light emitting diode display formed in the shape of a cylinder . the flexible organic light emitting diode display forming the display unit 100 may employ various known organic light emitting diode displays . in addition , the running machine 101 may further include a pair of support rings 300 located at both edges of the rotator 200 and the display unit 100 to support the rotator 200 and the display unit 100 . in the present embodiment , the pair of support rings 300 supports the rotator 200 to be rotatable ( e . g ., the rotator 200 is able to move with respect to the rings 300 ). in addition , the display unit 100 may be fixed by the pair of support rings 300 ( e . g ., fixed with respect to the support 500 , in a non - rotatable state ) rather than rotating along , or along with , the rotator 200 . thus , the rotator 200 rotates according to motion ( i . e ., walking or running ) of the user , and the display unit 100 may provide an image and / or image information to the user walking or running along the interior of the rotator 200 . furthermore , the rotator 200 functions as a surface for supporting the user , and also functions as a protection window to protect the display unit 100 . in further detail , the display unit 100 of the present embodiment can provide exercise information of the user such as , for example , walking or running speed , calories burned , distance traveled , etc . in addition , the display unit 100 can provide an image of a user - desired environment . that is , the display unit 100 may provide images selected by the user such as , for example , a forest park , an exotic street landscape , and / or other scenes found in nature , such that exercise experience of the user can be improved . in fig3 , the running machine 101 of the present embodiment has a structure in which the rotator 200 and the display unit 100 are separated from each other , but the exemplary embodiment of the present invention is not limited thereto . thus , the rotator 200 and the display unit 100 may be integrally formed . in this case , the display unit 100 rotates together with the rotator 200 . in addition , the display unit 100 is driven to display an image in consideration of a rotation speed ( e . g ., the images displayed on the display unit 100 may be adjusted to produce an image that appears to be steady or stable with respect to the user despite the rotation of the display unit 100 ). for rotation of the rotator 200 , the support 500 supports the rotator 200 and the display unit 100 while putting them in an erected ( e . g ., upright ) state . the support 500 may be at opposite sides of the rotator 200 , and may be offset in a thickness or width direction of the rotator 200 , or may be aligned on opposite sides of the rotator 200 in a rotation direction of the rotator 200 . in addition , the support 500 may rotatably drive the rotator 200 , and may do so using various devices and / or methods known to a person skilled in the art . for example , the support 500 can rotate the rotator with a motor roller . the support 500 of the present embodiment is provided at both sides of the rotator 200 while the rotator 200 is in the erected ( e . g ., upright ) state . the support 500 may be formed in the shape of a triangle or a triangular pyramid including two triangle - shaped sides and three square - shaped , or rectangularly - shaped , sides coupling the two triangle - shaped sides . in this case , one of the two triangular - shaped sides contacts the rotator 200 , and one of the three squared - shaped sides may be a bottom side , or a base . in addition , at least one of an information display unit and a control panel may be provided at another side of the third square - shaped sides in the support 500 . the user may control a rotation speed of the rotator 200 through the control panel 550 of the support 500 , and / or may select the type of image displayed in the display unit 100 . with such a configuration , the running machine 101 according to the exemplary embodiment of the present invention can improve the exercise experience of the user . hereinafter , operation of the running machine 101 provided on a table according to the exemplary embodiment of the present invention will be described with reference to fig4 . as shown in fig4 , the user stamps on , or steps on , the interior of the rotator 200 to walk or run . in this case , the user controls a rotation speed of the rotator 200 through the control panel 550 located in or on the support 500 , and selects an image displayed in the display unit 100 . the display unit 100 provides images such as , for example , a forest park , an exotic street landscape , and / or other scenes in nature in accordance with a rotation speed of the rotator 200 to provide the user walking or running on the rotator 200 with a visual effect of walking or running outside . accordingly , the user can expect an improved exercise experience . while embodiments of the present invention has been described in connection with what is presently considered to be practical exemplary embodiments , it is to be understood that the invention is not limited to the disclosed embodiments , but , on the contrary , is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims , and their equivalents .
a running machine including a hollow cylinder - shaped rotator having a diameter and including a wall having a constant thickness , a hollow cylinder - shaped display unit having a diameter greater than that of the rotator and encircling the rotator , and a support for supporting the rotator and the display unit in an upright state and for enabling rotation of the rotator about an axis of the rotator .