Abstract:
Electronic alpha-numeric or symbol sectional display system featuring readily accessible access to internally located modular display and other components for quick changeout of modular and other components. Display panels, which are modular, are readily and quickly secured in stackable enclosure cabinets by the use of ¼ turn or other quick fastening hardware. Other changeout friendly hardware is incorporated within to promote economy of manufacturing and changeout functions. Viewability of alpha-numeric or other symbol information is preserved and enhanced by the use of small panel fine mesh screens which maintain planar attributes and which are located at the front of each modular display panel residing in close proximity to the LED character block displays.

Description:
CROSS REFERENCES TO CO-PENDING APPLICATIONS 
     None. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention pertains to lighting displays or message boards and, more particularly, relates to a sectional electronic alpha-numeric light display system which incorporates modular assemblies which is easily and readily installed and maintained by the provision of quick and easy access to the internally located components. 
     2. Description of the Prior Art 
     Prior art sign displays were not always designed from the standpoint of easily and readily accomplished installation or maintenance and, at best, ready access was often considered late in the execution of the design. Access often was provided either from the back side or the front side of the sign and then required that a generous number of fasteners, such as screws, nuts, bolts, clips or the like be laboriously removed for separation of layered components and to disassemble the sign for access to the other internal components such as illuminating devices such as incandescent lights or LED&#39;s, circuit boards, power supplies or other such devices. Often displays of larger sizes required that entire large, unwieldy and expansive surrounding frontal framework members be removed to gain access to a small portion of the display, thus requiring the use of extra personnel. Large frontally located screen mesh in front of LED character blocks often proved difficult to properly stretch, to manage, to place and to orient without screen mesh distortion, thus hampering visual acuity. Excessive bulkiness also created a symmetry problem between adjacent LED character block panel assemblies. Addition of adjacent or stacked assemblies often proved difficult with respect to maintaining proper spacing between LED character block panel assemblies, wherein the distance from LED character blocks provided between LED character blocks in each individual LED character block panel assembly was not consistent when comparing LED character block to LED character block spacing of LED character blocks from one LED character block panel to other adjacent or stacked LED character block panel assemblies. 
     Clearly what is needed is a sectional sign display system which incorporates manageability with respect to installing component size, component symmetry and spacing, modularity and closely aligned LED character block components, which combines with quick and ready accessibility to the layered or other component members for the purpose of quick changeout or other maintenance such as is offered by the present invention, as now described. 
     SUMMARY OF THE INVENTION 
     The general purpose of the present invention is a sectional electronic alpha-numeric light modular display system, also called the sectional display system, which is constructed of major components incorporating, in general, building blocks of modules, including one or more stackable enclosure cabinets and a plurality of display panels, which are modular, fastened to and residing in the enclosure cabinet(s). Each modular display panel includes side by side, or in the alternative, singular display module/nested frame assemblies, joined by upper and lower framework channels. Each modular display panel has one or more display circuit board module/nested frame assemblies, each having a plurality of LED character blocks, a driver circuit board, sometimes incorporated in a display circuit board module, and inner and outer configured nesting frames surrounding the edges of the display circuit board module. The nesting inner and outer frames capture a fine mesh screen or other alternative filtering materials. The captured fine mesh screen aligns closely to the LED character block to provide best visual acuity and to prevent parallax distortion. Each modular display panel aligns to opposing inner and outer vertically aligned brackets located in the enclosure cabinet and is secured thereto by mating resident quick fastening hardware on the rearward edge of each display panel and on the inner and outer brackets. Access holes are provided through the display panel(s) for actuation of the quick fastening hardware for removal or installation of each modular display panel. The enclosure cabinet also houses a controller card, power supplies and other components. A method and structure is also provided for stacking of or placing side by side of multiple unit sectional displays constructed in accordance with the present invention. 
     According to one or more embodiments of the present invention, there is provided a sectional alpha-numeric or symbol light display system including an enclosure cabinet and one or more modular display panels secured within the enclosure cabinet. Each modular display panel includes an inner and an outer frame, a fine mesh screen or other filtering media closely engaged between the inner and outer frames, display circuit boards, which are modular, having LED character blocks located rearwardly of the fine mesh screen, a driver circuit board, upper and lower framework channels at the rear of the display circuit boards, and quick fastening hardware located and residing on the rearward portion of the upper and lower framework channels. The enclosure cabinet, which receives and accommodates each modular display panel, includes one or more inner and outer opposing and vertically oriented brackets having quick fastening hardware for accommodation of and for securing to the quick fastening hardware of the modular display panel. 
     One significant aspect and feature of the present invention is a sectional alpha-numeric or symbol light display system having quick change and installation capabilities. 
     Yet another significant aspect and feature of the present invention is a sectional alpha-numeric or symbol light display system which is readily accessible by common tools from the front. 
     Still another significant aspect and feature of the present invention is a sectional alpha-numeric or symbol light display system requiring a minimum of tools for accessing the interior of the display system. 
     A further significant aspect and feature of the present invention is a sectional alpha-numeric or symbol light display system incorporating quick fastening hardware for installation or removal of a modular display panel to or from the surrounding enclosure cabinet. 
     A still further significant aspect and feature of the present invention is a sectional alpha-numeric or symbol light display system in which the nucleus of components can be removed from the front of an enclosure cabinet. 
     Yet another significant aspect and feature of the present invention is component manageability with respect to size provided by incorporation of sectional, panel, and modular construction. 
     Yet another significant aspect and feature of the present invention is the incorporation of fine mesh screen or other filtering media utilized as small area manageable units. 
     Yet another significant aspect and feature of the present invention is close placement of the fine mesh screen or filtering media to LED character blocks to preserve visual acuity and to prevent or minimize parallax distortion. 
     Yet another significant aspect and feature of the present invention is the incorporation of nested outer frames and inner frames which capture a fine mesh screen or filtering media therebetween. 
     Still another significant aspect and feature of the present invention is the use of one or more horizontal aligned Z-shaped mounting bars and vertically aligned brackets on the rearward area of the sectional display system. Disassembly of the sectional display system is not required to attach the vertically aligned brackets to the rearward area of the sectional display system or to mount the sectional displays to a wall or suitable mounting surface. 
     Another significant aspect and feature of the present invention allows simple and straightforward ease of installation of the sectional display system where disassembly of components is not required. 
     Still another significant aspect and feature of the present invention is the ability to provide power to and to provide signal interconnecting between multiply-placed or multiply-stacked sectional display systems without disassembly of sectional displays during the mounting procedure. 
     Another significant aspect and feature of the present invention is the incorporation of internally threaded fasteners secured to component members which minimize construction and maintenance functions with respect to time, materials and cost. 
     Another significant aspect and feature of the present invention is the arraying of modular display panels and/or the arraying of sectional display systems to maintain center-to-center distance of LED character blocks consistently throughout the entire height and length of adjacent or stacked modular display panels and/or adjacent or stacked sectional display systems to provide a seamless appearance. 
     As shown in an alternative embodiment, flush mounted studs replace machine screws and extend in rigid fashion to provide for simpler overall ease of assembly and to present a more aesthetically pleasing display module outer frame. 
     Having thus set forth distinguishing traits of the present invention, it is one object of the present invention to provide a sectional alpha-numeric or symbol light display system having easily accessible installation and quick change capabilities. 
     Other objects of the present invention are now set forth. 
     Other aspects of the quick change display system are incorporated into already required parts, and thus parasitic parts are minimized. The fastening system is captive. That is, it is secured to each modular display panel or other components at all times and will not fall from a modular display panel when the panel is removed from the enclosure cabinet for service. Labor of factory assembly is reduced over conventional methods of modular display panel attachment. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Other objects of the present invention and many of the attendant advantages of the present invention will be readily appreciated as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, in which like reference numerals designate like parts throughout the figures thereof and wherein: 
     FIG. 1 illustrates an isometric semi-exploded view of a representative sectional electronic alpha-numeric or symbol light display system, known herein as the sectional display system; 
     FIG. 2 illustrates an exploded isometric front view of a representative modular display panel of FIG. 1; 
     FIG. 2A illustrates an isometric view of the outer frame; 
     FIG. 2B illustrates an isometric view of the inner frame; 
     FIG. 3 illustrates a front view of the enclosure cabinet of FIG. 1; 
     FIG. 4 illustrates an exploded side view in cutaway and partial cross-section of the sectional display system; 
     FIG. 5 illustrates a view of the quick fastener hardware; 
     FIG. 6 illustrates an isometric rear view of the sectional display system; 
     FIG. 7 illustrates the method of stacking of the sectional display system with other identical or similarly constructed or otherwise dimensioned sectional display systems; 
     FIG. 8 illustrates the constant center-to-center distance maintained between LED character blocks along and across display circuit board modules; 
     FIG. 9, a first alternative embodiment, illustrates an exploded isometric front view of a representative modular display panel incorporating flush mounted studs; 
     FIG. 10 illustrates a side view of the display panel incorporating flush mounted studs; and, 
     FIG. 11 illustrates the use of flush mounted studs mounted in the outer frame. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     FIG. 1 illustrates an isometric and partially exploded view of the electronic alpha-numeric or symbol light display system, known herein as the sectional display system  10 . The sectional display system  10  includes an enclosure cabinet  12  into which a plurality of like and similarly configured modular display panels  14   a ,  14   b ,  14   c  and  14   d  mount. The enclosure cabinet  12  includes a right planar side  16 , a left planar side  18 , a planar top  20 , a planar bottom  22  and a planar back  24 . Visible in FIG. 1 is a vertically aligned outer bracket  26  and a vertically aligned inner bracket  28 , each bracket extending between the planar top  20  and the planar bottom  22  and each being aligned and secured to the planar back  24 . The outer bracket  26  and the inner bracket  28  and additional like and similar brackets including a outer bracket  30  and an inner bracket  32  align in a like fashion as just described, and such is illustrated in FIG.  3 . Each inner or outer bracket includes a plurality of quick-connect fasteners, as later described in detail. Modular display panel  14   a , shown displaced from the enclosure cabinet  12 , includes a left display module/nested frame assembly  34  and juxtaposed similar right display module/nested frame assembly  36  each secured to an upper framework channel  38  and a lower framework channel  40  in common. When the modular display panel  14   a  is installed into the enclosure cabinet  12 , the upper and lower framework channels  38  and  40  position and align perpendicular to the outer bracket  26  and the inner bracket  28  and are suitably secured thereto by quick fastening hardware. Just the structure of the left display module/nested frame assembly  34 , which is similar in construction to the right display module/nested frame assembly  36 , is described in detail in FIG.  2  and other illustrations for the purpose of brevity and clarity. Also included at the ends of the planar top  20  are vertically oriented alignment pins  42  and  44  extending therefrom which can align to alignment holes in the planar bottom of additional sectional display systems  10  to facilitate stacking of sectional display systems  10 . Also included along the planar back  24  are a plurality of vertically aligned brackets  46   a - 46   n  and horizontally aligned and similarly shaped Z-shaped bars  48  upon which the brackets  46   a - 46   n  secure. 
     FIG. 2 illustrates an exploded view of the modular display panel  14   a , where all numerals correspond to those previously or otherwise described. Modular display panel  14   a  includes similar side by side and mutually joined left and right display module/nested frame assemblies  34  and  36  of which the left display module/nested frame assembly  34  is now described. The most readily visible components of the left display module/nested frame assembly  34  include an outer frame  50 , also illustrated in FIG. 2A, a fine mesh screen  52 , an inner frame  54 , also illustrated in FIG. 2B, a display circuit board module  56  which includes a plurality of LED character blocks  57   a - 57   n , and a driver circuit board  58  which, alternatively, can be incorporated into the display circuit board module  56 . The right display module/nested frame assembly  36  is composed of like and similar components as that shown in the left display module/nested frame assembly  34  including outer frame  50   a , a fine mesh screen  52   a , an inner frame  54   a , a display circuit board module  56   a , and a driver circuit board  58   a . Other components in this figure and following figures may also be referred to utilizing an “a” suffix to designate like and corresponding component parts. The upper and lower framework channels  38  and  40  align across and suitably secure to the upper regions and the lower regions of the display circuit board module  56  and also to the adjacent display circuit board module  56   a  of the right display module/nested frame assembly  36  to secure together the components of the left and right display module/nested frame assemblies  34  and  36 , thereby forming the modular display panel  14   a . Inner frame  54  and outer frame  50  are similarly shaped but differently dimensioned structures. The inner frame  54  is constructed to nest and fit closely within the general confines of the outer frame  50  and at the same time to capture the fine mesh screen  52 , or alternative filtering media, between the structure of the inner and outer frames  54  and  50 , respectively. 
     The outer frame  50 , a one-piece unit, as also shown in FIG. 2A, includes a top planar panel  60 , an opposing bottom planar panel  62 , a left planar panel  64 , a right planar panel  66 , an upper planar frontal panel  68  extending at a right angle downwardly from the top planar panel  60 , a lower planar frontal panel  70  extending upwardly at a right angle from the bottom planar panel  62 , a left planar frontal panel  72  extending inwardly at a right angle from the left planar panel  64 , a right planar frontal panel  74  extending inwardly at a right angle from the right planar panel  66 , a horizontally aligned central planar frontal panel  76  located and extending between the left planar frontal panel  72  and the right planar frontal panel  74 , an upper planar tab  78  and a lower planar tab  80  extending inwardly from the left planar frontal panel  72 , and an upper planar tab  82  and a lower planar tab  84  extending inwardly from the right planar frontal panel  74 . Each planar tab  78 ,  80 ,  82  and  84  and the central planar frontal panel  76  includes a body hole for securing of the outer frame  50  to the inner frame  54  by a plurality of machine screws  87   a - 87   n  which engage a plurality of internally threaded spacers  85   a - 85   n  on the rearward side of the inner frame  54  for the purpose of securing the fine mesh screen  52  therein. Access hole  77  is located in the upper planar frontal panel  68  and access hole  81  is located in the lower planar frontal panel  70  and access hole  79  and access hole  83  are located in the corresponding panels  68   a  and  70   a  of the outer frame  50   a  (of the right display module/nested frame assembly  36 ) for actuation (through additional component layers) of a plurality of quick fastening hardware ¼ turn male fasteners  89   a - 89   n  located in the upper and lower framework channels  38  and  40 , as later described in detail. Operation of the quick fastening hardware ¼ turn male fasteners  89   a - 89   n  in the appropriate rotational manner through the access holes  77 ,  79 ,  81  and  83  allows the left and right display module/nested frame assemblies  34  and  36 , which together form the modular display panel  14   a , to be installed or removed as a single unit. 
     The inner frame  54 , as also shown in FIG. 2B, a one-piece unit, is sized slightly smaller than the outer frame  50 , and the planar frontal panels of the inner frame  54  are configured dimensionally to replicate in alignmental size the corresponding planar frontal panels of the outer frame  50  to which the planar frontal panels of the inner frame  54  align in order to provide best frontal alignment for capture of the fine mesh screen  52 . The inner frame  54  includes a top planar panel  86 , an opposing bottom planar panel  88 , a left planar panel  90 , a right planar panel  92 , an upper planar frontal panel  94  extending at a right angle downwardly from the top planar panel  86 , a lower planar frontal panel  96  extending upwardly at a right angle from the bottom planar panel  88 , a left planar frontal panel  98  extending inwardly at a right angle from the left planar panel  90 , a right planar frontal panel  100  extending inwardly at a right angle from the right planar panel  92 , a horizontally aligned central planar frontal panel  102  located and extending between the left planar frontal panel  98  and the right planar frontal panel  100 , an upper planar tab  104  and a lower planar tab  106  extending inwardly from the left planar frontal panel  98 , and an upper planar tab  108  and a lower planar tab  110  extending inwardly from the right planar frontal panel  100 . Each planar tab  104 ,  106 ,  108  and  110  and the central planar frontal panel  102  includes a body hole for securing of the outer frame  50  to the inner frame  54  by the plurality of machine screws  87   a - 87   n  which engage the plurality of internally threaded spacers  85   a - 85   n  on the rearward side of the frame  54  for the purpose of securing the fine mesh screen  52  therein. Access holes  120  and  122  are located in the upper planar frontal panels  94  and  94   a  and access holes  124  and  126  are located in the lower planar frontal panels  96  and  96   a  for actuation (through additional component layers) of a plurality of quick fastening hardware ¼ turn male fasteners  89   a - 89   n  located in the upper and lower framework channels  38  and  40 , as later described in detail. 
     The fine mesh screen  52 , or alternate filtering media, may be preformed to provide a left planar tab  112  and a right planar tab  114  and also includes a top edge  116  and a bottom edge  118 . The fine mesh screen  52  is captured between the structure of the inner and outer frames  54  and  50 , respectively, and presents a smooth fine mesh planar area for optimal and undistorted viewing of the LED character blocks  57   a - 57   n  located immediately to the rearward of the fine mesh screen  52 . The left planar tab  112  of the fine mesh screen  52  is captured in frictional engagement between the left planar panel  64  of the outer frame  50  and the left planar panel  90  of the inner frame  54 , and, in a similar fashion, the right planar tab  114  of the fine mesh screen  52  is captured in frictional engagement between the right planar panel  66  of the outer frame  50  and the right planar panel  92  of the inner frame  54 . To aid in retaining a flat and planar fine mesh screen ( 52 ) surface, the top edge  116  is captured and held by the outer frame upper planar frontal panel  68  and the inner frame upper planar frontal panel  94  and the bottom edge  118  is captured and held by the outer frame lower planar frontal panel  70  and the inner frame lower planar frontal panel  96 . The plurality of machine screws  87   a - 87   n  align the outer frame  50 , expressly, through the body holes of the upper planar tabs  78  and  82 , the lower planar tabs  80  and  84 ; through appropriately located (not shown) holes in the screen  52 ; through the inner frame  54 , expressly, through the body holes of the upper planar tabs  104  and  108 , the lower planar tabs  106  and  110 ; and then into a plurality of internally threaded spacers  85   a - 85   n . The machine screws  87   a - 87   n  are tightened in the spacers  85   a - 85   n  to draw the inner frame  54  and the outer frame  50  towards each other in nesting and intimate engagement to capture, tension and contain the fine mesh screen  52  therein. Access holes  77 ,  79 ,  81  and  83  in the upper planar frontal panels  68  and  68   a  and the lower planar frontal panels  70  and  70   a , respectively, of the outer frames  50  and  50   a , respectively, are in alignment through appropriately located (not shown) holes in the screens  52  and  52   a , respectively, with access holes  120 ,  122 ,  124  and  126  in the upper and lower planar frontal panels  94  and  94   a  and  96  and  96   a , respectively, with a plurality of holes  129   a - 129   n  in the display circuit board modules  56  and  56   a , respectively, with a plurality of holes  132   a - 132   n  in the upper and lower framework channels  38  and  40 , respectively, and with a plurality of ¼ turn male fasteners  89   a - 89   n  secured, for the purpose of rotation, in the rearward portion of the upper and lower framework channels  38  and  40 . 
     FIG. 2A illustrates an isometric view of the outer frame  50 , where all numerals correspond to those previously or otherwise described. 
     FIG. 2B illustrates an isometric view of the inner frame  54 , where all numerals correspond to those previously or otherwise described. 
     FIG. 3 illustrates a front view of the enclosure cabinet  12  with the modular display panels  14   a ,  14   b ,  14   c  and  14   d  removed, where all numerals correspond to those previously or otherwise described. Illustrated in particular are symmetrically opposed outer brackets  26  and  30 , symmetrically opposed inner brackets  28  and  32 , and the plurality of ¼ turn female fastener receptacles  130   a - 130   n  residing thereupon. A plurality of power supplies  134   a - 134   d , intended for use with modular display panels  14   a - 14   d , a controller card  136 , an optional modem  138 , an optional fuse/fuse holder  135 , an optional transformer  137 , an optional buzzer  139 , and other components are secured to the planar back  24  of the enclosure cabinet  12 . An access termination panel  140  is also located on the planar back  24  for access to signal input and output jacks  142  and  144  and to a power input jack  145 . The signal input and output jacks  142  and  144  facilitate connection of multiple sectional display systems  10  where a plurality of sectional display systems are stacked or placed side by side for large display use. 
     FIG. 4 illustrates a side view of modular display panel  14   b , similar in construction to the previously described modular display panel  14   a , removed from but aligned to the upper region of the enclosure cabinet  12 , where all numerals correspond to those previously or otherwise described. Illustrated in particular is the placement and alignment of the components of the modular display panel  14   b  with respect to itself and to the components of the enclosure cabinet  12 . As previously described, the plurality of machine screws  87   a - 87   n  pass through the planar tabs of the outer frame  50 , the fine mesh screen  52 , the inner frame  54  and into the plurality of internally threaded spacers  85   a - 85   n . Machine screws  87   a - 87   n  extend through and beyond the internally threaded spacers  85   a - 85   n  to serve as mounting posts for the display circuit board module  56  which is secured thereto by a plurality of nuts  128   a - 128   n . In a somewhat similar fashion, a machine screw  53 , of short length, passes through a hole  51  (FIG. 2) of the central planar frontal panel  76  of the outer frame  50 , through the fine mesh screen  52 , through a hole  49  of the central planar frontal panel  102  of the inner frame  54 , and into a male/female threaded spacer  69  that is attached to the display circuit board module  56  to ensure and maintain flatness and planarity in the central region of the fine mesh screen  52 . The male/female threaded spacer  69  is attached through the driver circuit board module  56  into another male/female threaded spacer  71  and through the driver circuit board  58  to receive a nut  59  to secure the driver circuit board  58  to the display circuit board module  56 . Also secured to the upper framework channel  38  and the lower framework channel  40  are captivated threaded inserts  148   a - 148   n . A plurality of machine screws  156   a - 156   n  pass through the upper region and the lower region of the display circuit board modules  56  and  56   a  to engage the internally threaded fittings  148   a - 148   n  to secure the upper and lower framework channels  38  and  40  to the display circuit board modules. The upper framework channel  38  and the lower framework channel  40  serve as a structural stiffener for the display circuit board modules  56  and  56   a , as well as the modular display panels, such as modular display panel  14   b . Alignment pin  42  threadingly engages one of a plurality of captivated threaded inserts  150   a - 150   n  which are secured to the planar top  20  of the enclosure cabinet  12 . Alternatively, ring supports  184 , such as shown in FIG. 7, can be utilized in engagement with the captivated threaded inserts  150   a - 150   n  in lieu of the alignment pins  42  and  44  for suspension, such as by a cable or other suitable device, of the sectional display system  10 . A bracket  46   a  is shown secured to the planar back  24  of the enclosure cabinet  12  by a plurality of fasteners  152   a - 152   n , which pass through captivated threaded inserts  151   a - 151   n  which mutually secure the planar back  24  of the enclosure cabinet  12 , the bracket  46   a  and the outer bracket  26 . A plurality of rivets  160   a - 160   n  pass through the planar back  24  of the enclosure cabinet  12  and secure the outer bracket  26  and other brackets to the planar back  24 . The use of internally threaded fittings, such as captivated threaded inserts  148   a - 148   n  and  151   a - 151   n , simplifies construction and assembly of the invention and also aids in quick and simple installation and for component change-outs without the need for a large number of tools. 
     FIG. 5 illustrates the engagement of the upper framework channel  38  to the outer bracket  26 , where all numerals correspond to those previously or otherwise described. With reference to FIG.  5  and FIG.  4  and other figures previously described, the mode of operation is now described in part. The modular display panel  14   b  is brought into engagement within the enclosure cabinet  12 , subsequent to cable loom engagement, such that the upper framework channel  38  and the lower framework channel  40  align against the outer bracket  26  and the inner bracket  28 . This action aligns the ¼ turn male fastener  89   a  on the upper framework channel  38  to the ¼ turn female fastener receptacle  130   d  located on the outer bracket  26 . Subsequently, a screwdriver  154  or other such suitable device is inserted into the co-centered access holes  77  and  120  in the outer frame  50  and the inner frame  54  to engage the ¼ turn male fastener  89   a  and to subsequently position and rotate the shaft thereof to engage the ¼ turn female fastener receptacle  130   d , thus securing a portion of the modular display panel  14   b  to the enclosure cabinet  12 . The same process is used to fasten the remaining ¼ turn male fasteners to the remaining ¼ turn female fastener receptacles. Removal of the modular display panel  14   b  simply incorporates the reversal of the process where a screwdriver  154  or other suitable device in inserted and rotated to disengage the ¼ turn male fasteners from the ¼ turn female fastener receptacles and disconnection of cable looms. Any appropriate quick-connect hardware can be utilized for fastening of the modular display panel  14   a - 14   d  to the enclosure cabinet  12  and shall not be considered to be limiting to the scope of the invention. The first step in disassembly of the invention for component change-out or repair is rapidly accomplished by removal of the modular display panels, such as modular display panel  14   b , in the manner just described. Further disassembly and removal of the driver circuit board  58  is accomplished simply by removal of nut  59 . Removal of the inner frame  54 , outer frame  50  and the fine mesh screen  52  as a unit from the display circuit board module  56  is simply accomplished by removal of nuts  128   a - 128   n  and the screw  53 ; and, further disassembly is facilitated by removal of the upper and lower framework channels  38  and  40  from the display circuit board module  56  by removal of machine screws  156   a - 156   n  subsequent to removal of the inner frame  54 , outer frame  50  and the fine mesh screen  52  as a unit. 
     FIG. 6 illustrates an isometric rear view of the sectional display system  10 , where all numerals correspond to those previously or otherwise described. Illustrated in particular are the components incorporated for securing the enclosure cabinet  12  containing other components of the sectional display system  10  to a wall or other such surface. The plurality of brackets  46   a - 46   n  are similar in design, and of which can be mirror images, can each include a planar panel  162  which secures to the planar back  24  by a plurality of fasteners  152   a - 152   n , a configured planar panel  164  extending at a right angle from the planar panel  162 , an upper tab  166  and a lower tab  168  extending from the planar panel  162 , and an upper slot  170  between the configured planar panel  164  and the upper tab  166 , and a lower slot  172  between the configured planar panel  164  and the lower tab  168 . Another bracket, called a Z-bar,  48  secures to a wall or other suitable structure to accommodate the brackets  46   a - 46   n . The Z-bar  48  includes a first vertically oriented planar panel  174 , a second horizontally oriented panel  176  extending at a right angle from the first panel  174  and a third vertically oriented panel  178  extending upwardly at a right angle from the second panel  176 . Panel  178  can be utilized to engage either or both of the slots  170  and  172  of each bracket  46   a - 46   n , as shown in FIG.  7 . Ease of installation of the sectional display system  10  is simple and straightforward and disassembly of components is not required. The brackets  46   a - 46   n  are simply secured to the enclosure cabinet  12  by fasteners  152   a - 152   n  in engagement with the captivated threaded inserts  151   a - 151   n , as illustrated in FIG. 4, and then the sectional display system  10 , including the brackets  46   a - 46   n  are hung on the mounted Z-bar(s)  48 . Power and signal interconnects are quickly made between adjoining sectional display systems by cables between the access termination panels  140 . 
     FIG. 7 illustrates a side view of multiple stacked sectional display systems  10 ,  10   a  and  10   b , where all numerals correspond to those previously or otherwise described. A plurality of fasteners  180   a - 180   n  secure a plurality of Z-bars  48  to a wall  182  or other such mounting structure. Two Z-bars  48  are utilized to engage the upper slots  170  and the lower slots  172  to mount the first and lowest sectional display system  10  to the wall  182 . A second sectional display system  10   a  is positioned on top of the first sectional display system  10  such that holes correspondingly aligned and located in the planar bottom  22  of the second enclosure cabinet  12  engage the alignment pins  42  and  44  extending from the planar top  20  of the first enclosure  12  to positionally fix the lower region of the second sectional display system  10   a  without the incorporation of an additional and lower Z-bar  48  in the lower slot  172 , thus providing for economy of installation with respect to time and materials. An upper Z-bar  48  is incorporated to secure the upper region of the second sectional display system  10   a  wherein the upper slot  170  of the second sectional display system  10   a  is engaged. Additional sectional display systems such as sectional display system  10   b  can be installed in the same manner and fashion as that used for installation of the sectional display system  10   a . An optional ring  184  is shown extending from the third sectional display system  10   b  such as would be incorporated to suspend a single sectional display system  10 . 
     FIG. 8 illustrates the constant center-to-center distance between LED character blocks  57   a - 57   n  along and across arrayed display circuit board modules  56  and  56   a , where all numerals correspond to those elements previously or otherwise described. Variously dimensioned LED character blocks  57   a - 57   n  can be incorporated, such as, for purposes of example and illustration, 1.26″h×0.90″w, 2.10″h×1.50″w, and 4.20″h×3.00″w. For purposes of example and illustration, LED character blocks  57   a - 57   n  measuring 2.10″h×1.50″w are placed at a vertical spacing of 3.35″ between the center of each LED character block  57   a - 57   n  located on upper and lower display circuit board modules  56  and  56   a , and additional corresponding display circuit board modules  56  and  56   a , as illustrated. Vertical and equal distances V1 and V2 are referenced from the upper and lower edges of each display circuit board modules  56  and  56   a , respectively, where V1 is the distance between the top of an LED character block (such as  57   a ) and the top of the display circuit board module  56 , and where V2 is the distance between the bottom of an LED character block (such as  57   d ) and the bottom of the display board module  56 . The vertical distances V1 and V2 between LED character blocks  57   d  and  57   e , plus a predetermined interceding display board module gap, are such that a vertical spacing of 3.35″ between the centers of LED character blocks  57   d  and  57   e  will be maintained across juxtaposed upper and lower display circuit board modules  56 . In a like and similar fashion, a horizontal spacing of 1.9″ between the center of each LED character block located on upper and lower display circuit board modules  56  and  56   a , and additional corresponding display circuit board modules, as illustrated. Horizontal height H1 and H2 are located at the left and right edges of each display circuit board modules  56  and  56   a , respectively, where H1 is the distance between the left edge of an LED character block (such as  57   h ) and the left edge of the display circuit board module  56 , and where H2 is the distance between the right edge of an LED character block (such as  57   t ) and the right edge of the display board module  56   a . The horizontal distances H1 and H2 between LED character blocks  57   t  and  57   u , plus predetermined interceding display board module gap, are such that a horizontal spacing of 1.9″ between the center of LED character blocks  57   t  and  57   u  will be maintained across juxtaposed upper and lower display circuit board modules  56   a  and  56 . Any number of sectional display systems  10  can be stacked or placed next to each other to provide appropriately constant and equally spaced LED character blocks placed together in a seamless array, that is to say, that the vertical spacing and horizontal spacing, respectively, between corresponding LED character block centers will always be 3.35″ and 1.9″ as just described. 
     FIG. 9, a first alternative embodiment, illustrates an exploded view of the modular display panel  14   a , as described and shown in FIG. 2, but modified to provide for quicker and easier assembly, as well as providing for a more aesthetically pleasing appearance. Such modification includes the replacement of the plurality of machine screws  87   a - 87   n  by studs  200   a - 200   n  which are of self-clinching design which firmly attach to and are flush mounted, and which extend through the body hole of each of the planar tabs  78 ,  80 ,  82  and  84  in the outer frame  50 . Machine screw  53  is replaced by a stud  202  similar to studs  200   a - 200   n  which firmly attaches to and extends through the hole  51  in the outer frame  50 . The studs  200   a - 200   n  extend through the fine mesh screen  52  (and  52   a ), as well as the body holes of each of the planar tabs  104 ,  106 ,  108  and  110  and through hole  49  of the inner frame  54 , in a manner consistent with that previously described for the machine screws  87   a - 87   n  and machine screw  53 . The studs  200   a - 200   n  and stud  202  also threadingly engage spacers  85   a - 85   n  and nuts  128   a - 128   n . Spacer  69  is replaced by a spacer  204  similar to spacers  85   a - 85   n . Stud  202  extends through the spacer  204  to act and serve the same function as the replaced (male/female) spacer  69  which threadingly engages the male female spacer  71 . Such an arrangement of firmly anchored studs  200   a - 200   n  and stud  202  eliminates the placement of machine screws one at a time and offers multiple engagement of body holes and the like without the cumbersome individual placement of the machine screws and subsequent use of a screwdriver formerly required in the tightening process. 
     FIG. 10 illustrates a side view of the display panel  14   b  similar in construction to the previously described display panel showing studs  200   a - 200   n  and stud  202  firmly engaging the outer frame  50  in flush fashion, as previously described. The studs  200   a - 200   n  and stud  202  are self-clinching and are flush mounted to the outer frame  50 . Such flush mounting presents a more streamlined and aesthetically pleasing look, as well as contributing to a low profile of the outer frame  50  and of the sectional display system  10 . 
     FIG. 11 illustrates the engagement of the upper framework channel  38  to the outer bracket  26  and, in particular, illustrates the studs  200   a - 200   n , which are self-clinching, being flush mounted in the outer frame  50 . 
     Various modifications can be made to the present invention without departing from the apparent scope hereof.