referring to fig1 through 12 , preferred embodiments of the present invention will be described . with respect to fig1 a front perspective view of a first preferred embodiment of the present 3d illusion frame 10 invention is shown in a horizontal display configuration . the display frame housing 20 includes a curved front wall 22 which surrounds a viewing aperture 28 through which an image object 90 may be viewed . joined to front wall 22 along one edge is a first rear wall 24 , and joined to wall 22 along an opposite edge is a second rear wall 26 . display frame housing 20 is supported upon base 30 by two mounting pegs 70 . base 30 includes a front surface 32 upon which textual or graphic material 40 may optionally be displayed . front surface 32 extends substantially across the width of base 30 , and forms a predetermined acute angle from the vertical , which tilts front surface 32 a predetermined angle away from a viewer facing the front wall 22 of display frame housing 20 . display frame housing 20 may alternatively be repositioned in a vertical display configuration , as shown in fig2 . the display frame housing 20 may easily be reconfigured between horizontal and vertical configuration , as will be discussed below . referring to fig1 , 6 , 8 , 9 , 10 a and 11 , a first embodiment of the 3d illusion frame 10 includes display frame 20 in a horizontal configuration removably attached to base 30 by two first mounting pegs 70 . with particular reference to fig8 pegs 70 include an upper portion 74 of predetermined diameter and a lower portion 76 having a predetermined diameter smaller than the diameter of portion 74 , and further having a different predetermined cross - sectional shape and size . a shoulder 72 is formed at the junction of upper portion 74 and lower portion 76 of peg 70 . upper portion 74 of peg 70 includes projection 80 which forms curved mating surface 84 . the curvature of surface 84 is adapted to be complimentary to the shape or curvature of the outer surface 50 of the second rear wall 26 of display frame 20 . pin 86 extends from mating surface 84 and is adapted to snugly , but removably engage positioning holes 36 , 38 formed in wall 26 . the upper portion 74 of peg 70 includes lip 82 and groove 88 which are adapted to removably engage the edge of wall 26 . display frame 20 is assembled to first mounting pegs 70 by placing the edge of rear wall 26 into groove 88 and rotating display frame 20 about the edge of wall 26 relative to peg 70 so as to engage pin 86 in one of the positioning holes 36 , 38 . by reversing this operation , frame 20 may be disassembled from first mounting pegs 70 . pin 86 and positioning holes 36 , 38 have complimentary shape and size to engage snugly , but removably . further referring to fig1 , 6 , 8 , 9 , 10 a and 11 , the lower portion 76 of each of first mounting pegs 70 is received in sockets 54 , 56 formed in the top surface 34 of base 30 . sockets 54 , 56 are adapted to be complimentary to the shape and size of lower portion 76 of each peg 70 . each of pegs 70 is inserted into sockets 54 , 56 until peg shoulder 72 contacts the top surface 34 of base 30 . the intersection of the long axis of first mounting peg 70 and the chord of the curvature of mating surface 84 forms a first predetermined acute angle , and when inserted into base 30 , the long axis of peg 70 forms a second predetermined acute angle from the vertical , which angles together tilt the display frame 20 a third predetermined angle away from a viewer facing its front wall 22 . referring to fig2 , 5 , 6 , 7 , 9 , 10 b and 12 , a second embodiment of the 3d illusion frame 10 includes display frame 20 placed in a vertical configuration , and removably attached to base 30 by two second mounting pegs 58 . with particular reference to fig7 each second mounting peg 58 includes an upper portion 62 of predetermined diameter , preferably of a cylindrical shape , and a lower portion 64 having a predetermined diameter smaller than that of portion 62 and further having a different predetermined cross - sectional shape and size . a shoulder 60 is formed at the junction of upper portion 62 and lower portion 64 of peg 58 . upper portion 62 of each second mounting peg 58 includes slot 66 having floor 68 which is adapted to compliment the shape and thickness of the first rear wall 24 and the second rear wall 26 of display frame 20 in order to receive either of these two rear walls . slot 66 of peg 58 is sized and configured to snugly , but removably engage the first inner surface 46 , second inner surface 48 , first outer surface 50 , and second outer surface 52 of rear walls 24 , 26 , respectively . display frame housing 20 is mounted on second pegs 58 by inserting a curved edge of rear wall 24 or rear wall 26 into slot 66 until the floor 68 is contacted . by reversing this operation , frame 20 may be disassembled from second mounting pegs 58 . further referring to fig2 , 5 , 6 , 7 , 9 , 10 b and 12 , the lower portion 64 of each of second mounting pegs 58 is received in sockets 54 , 56 formed in the top surface 34 of base 30 . sockets 54 , 56 are adapted to conform to the shape and size of lower portion 64 of peg 58 , which is admitted into either of sockets 54 , 56 until peg shoulder 60 contacts the top surface 34 of base 30 . when inserted into base 30 , the long axis of each peg 58 forms a predetermined acute angle from the vertical , which tilts the display frame 20 a predetermined angle away from a viewer facing its front wall 22 . referring to fig1 and 12 , display frame 20 includes an image object 90 , typically a photograph or graphic selected by the user . optionally , the image object 90 may be enclosed in a transparent or translucent holder having a front leaf 92 and a rear leaf 94 . with particular reference to fig1 , the image object 90 may be positioned in a forward position within frame 20 so as to essentially conform with the inner surface 42 of front wall 22 . alternatively , and with particular reference to fig1 , the image object 90 may be positioned in a rearward position within frame 20 so as to essentially conform with the inner surfaces 46 , 48 of rear walls 24 , 26 , respectively . when viewed through viewing aperture 28 with the image object 90 in a rearward position within frame 20 a visual suggestion of depth may be perceived . as has been described herein , the display frame 20 may be positioned on base 30 to display an image object 90 in either a horizontal format or a vertical format at the discretion of the user , and the display frame 20 may easily be alternated between the horizontal format configuration or the vertical format configuration as required by the format of the image object 90 . the 3d illusion frame 10 is preferably fabricated of plastic , however any material having the required strength and rigidity may be used . it will be understood by one skilled in the art that sockets 54 , 56 and lower portion 76 of first mounting peg 70 , and the lower portion 64 of second mounting peg 58 , may each be keyed so as to admit mounting pegs 58 , 70 in only selected orientations . it will also be understood by one skilled in the art that second mounting peg 58 and first mounting peg 70 may be fabricated as a single integrated structure combining both functions of supporting display frame 20 in the horizontal and in the vertical orientations , and further that the two peg mounting configuration may be replaced by a single structure . it will further be understood by one skilled in the art that walls 22 , 24 , 26 need not be curved , but may be planar , and that walls 24 , 26 may be extended to form a single wall . it will additionally be appreciated by one skilled in the art that walls 22 , 24 and walls 22 , 26 need not be joined along a common edge , but may each be joined to an intervening structure to increase the distance between walls 22 , 24 and walls 22 , 26 , respectively . it will be understood that certain features and sub - combinations are of utility and may be employed without reference to other features and sub - combinations as they are outlined within the description above and within the claims appended hereto . while the preferred embodiments and application of the invention have been described , it is apparent to those skilled in the art that the objects and features of the present invention are only limited as set forth in the claims appended hereto .
the present invention concerns a display frame and base which provides for easily alternating the orientation of the display frame with respect to the base between a horizontal display format and a vertical display format , and which frame suggests the illusion of depth of a displayed image . the base , additionally , provides a substantially upright broad front face suitable for presentation of graphic or textual information .