Patent Publication Number: US-9420901-B2

Title: Low voltage plug and play display system for general application in gondola systems

Description:
CROSS-REFERENCED APPLICATION 
     This application claims priority to U.S. Provisional Patent Application Ser. No. 61/978,509, filed Apr. 11, 2014, the subject matter of which is incorporated herein in its entirety as if fully set forth verbatim herein. 
    
    
     BACKGROUND 
     1. Field of the Disclosure 
     The present disclosure relates generally to a display system having a lighting mechanism on the underside of a shelf for illuminating an item on display on another shelf below the lighting mechanism. The display system includes at least a removable shelf and a wall panel and may include other structures for display purposes. More particularly, the present disclosure relates to an illuminated display system that may be fitted to existing gondola systems, thereby avoiding the cost of purchasing a new gondola system. Preferably, the display system utilizes light emitting diode (LED) lighting as part of the display system. 
     2. Description of Related Art 
     Electrical wires are nearly always a problem in illuminated commercial product displays, including free-standing displays and gondola systems. Usually, an LED device, such as an LED tube and/or LED strip, is connected to a power source using wires and/or electric cords. Wires and/or cords are placed on the displays and gondola systems both horizontally and vertically, under shelves, along columns and/or other places resulting in visual chaos. This wires and/or cords also often block clear views of merchandise on the display shelves and create such potential safety issues as broken/exposed wires and/or cords that may be touched by shoppers or come into contact with electrically conductive parts of the display system or gondola, thereby creating a shock hazard. 
     Typical methods of lighting shelves include lighting connected to the shelves. These shelving and lighting structures generally enclose internal wiring and lighting which may be used to illuminate items on the shelves. This lighting method, however, generally prohibits the flexibility associated with modular shelving. More particularly, this lighting method requires a shelf structure that will not allow for disconnecting a shelf from a first location on a support structure and connecting the shelf at a different, second location on the support structure. In addition, these shelving systems are based on relatively high voltage AC power sources which introduce excess wiring that results in somewhat complex wiring on the shelves themselves and/or requires the use of “step-down” transformers or ballasts to cut down the voltage between the electric source and the lights. In addition, the electrical connections of these types of shelving systems are not completely insulated from the shelving components themselves, and offer potential for electrical shock to shoppers. In these shelving systems, the standards into which the shelves are hooked for support also provide the electric current for powering the lights associated with the shelves. Thus, the standards must be made of metal for the purpose of conducting the electricity and completing the electric circuit. 
     One solution that has been developed in an attempt to overcome the disadvantages and potential problems of the above systems is a so-called “plug-and-play” technology for use in low-voltage LED display systems. Plug-and-play technology has been mostly employed in display for cosmetic products. These types of products are not particularly heavy and do not require shelving that is as sturdy as some other products. These displays usually have walls with 12″ molded plastic or similarly-sized back panels and trays. The back panels comprise vertical conductive standards connected to a power source. The molded trays comprise LEDs and conductive brackets. Low-voltage electric current passes through the vertical conductive standards of the back panels and to the tray brackets to ultimately power the LEDs. Conductive standards and brackets must both be insulated. This design employs such a support system of standards and tray brackets as part of an electrically conductive system. A fundamental problem with the above type of design is that this design is generally restricted to sizes such as 12″ trays or trays of similar width. It is difficult to apply this design to larger-sized shelves, such as 36″ or 48″ widths as well as to 14″ to 36″ depths. 
     A second problem with the typical designs described above is that they cannot work for existing gondolas, which are not insulated. Safety criteria will not permit the use of non-insulated DC12V or DC24V low-voltage gondola uprights and shelf brackets. 
     As a solution to the foregoing problems, a vertical conductive clip-belt has been developed that is disposed behind the gondola wall (instead of conductive standards behind the wall) and conductive poles are placed in the display trays to make electrical connection with the vertical conductive clip belt disposed behind the gondola wall. The conductive poles are parallel to, but separate from, the support brackets that support the weight of merchandise on the display shelves. This is distinguished from previous designs that used support brackets that are also conductive. The conductive poles provide electric current to the LED devices associated with the shelves via electric circuitry that is completely insulted with no possibility of contacting any of the shelf display or gondola components and/or of contact by shoppers. This design is the subject matter of U.S. patent application Ser. No. 13/959,149 (and U.S. Provisional Application Ser. No. 61/680,987, both of which are incorporated herein by reference) of Yeyang Sun, the applicant of the present disclosure. In the &#39;149 application, all conductive components are insulated and the support system (wall standards and tray brackets) are separated from the conductive components of the system (wall clip-belt and conductive poles). This separation development also is applicable to most size shelving, such as 12″ to 48″ widths and 12″ to 36″ depths. A benefit of the separation development is that from a visual aesthetics point of view, no wires and/or cords are exposed. Although the foregoing development may be retrofitted to existing gondola systems, the retrofitting requires dismantling of the gondola system, installing the clip belts and related wiring of the lighting system, and reassembly of the gondola system. For existing gondola systems, this can be time consuming and expensive from a labor point of view, including the cost of removing and replacing merchandise on the existing shelves. 
     Accordingly, there is a need for a system that provides completely insulated electrical circuitry from the power source to the lighting fixtures and back, but without the need of disassembly and reassembly of the gondola system. Preferably, such a system would also be simple to install, provide flexibility in the gondola system to which it can be applied and to shelf location, while eliminating or limiting the number of wires and/or cords that are exposed. 
     These and other needs are met by one embodiment of the low profile, low-voltage plug and play display system of the present disclosure. The above-described concept of separation of conductive elements from the support system is carried forward and applied in the present disclosure of a low profile, low-voltage plug and play gondola devices for general application, including to new gondola walls, as well as existing pegboards. For retrofitting existing gondola systems all that is required by the development of the present disclosure is a narrow gap, in general on the order of about ¼″, between the rear edge of the shelf and the existing gondola wall, pegboard or non-pegboard. There is no need to modify the bracketing elements of the shelves of the display system to allow for an extra “gap” or space between the rear edge of the shelf and the gondola, as is necessary for some state of the art systems. As alternatives, two embodiments of the present disclosure provide for an essentially “no profile”, low voltage plug and play device designed to provide low voltage for under-the shelf lighting with “no-gap” or “almost-no-gap” needed between the rear edge of a shelf and the existing gondola wall, pegboard or non-pegboard. 
     SUMMARY 
     In one embodiment in accordance with the present disclosure, there is provided a display system comprising: (1) a gondola having at least two opposed uprights providing at least two rows of vertically disposed slots for accepting shelf brackets, the at least two rows of vertically disposed slots spaced apart from each other; (2) at least one shelf having a top side, a bottom side having disposed thereon a lighting device, a front edge, a rear edge disposed adjacent to the gondola and spaced apart from the gondola by a narrow gap of about one-quarter inch (¼″) or less when the shelf brackets are engaged in the vertically disposed slots, and a length with two ends, each end having disposed thereon a bracket configured to engage one of the two rows of vertically disposed slots; and (3) a power supply for the display system comprising: an elongate strip disposed substantially parallel to one row of the slots and having a thickness such that it fits in the gap between the rear edge and the gondola without modifying the shelf brackets to provide a larger gap, the elongate strip having a front side disposed distal the gondola and a rear side disposed proximal the gondola and two substantially parallel and insulated channels, each parallel and insulated channel having an elongate conductive strip disposed therein proximal the rear side, one elongate conductive strip comprising a positive pole and one conductive strip comprising a negative pole; and a shelf connector affixed to the bottom of the shelf and disposed proximal the rear edge between the elongate strip and the lighting device, the shelf connector having at least two spring actuated conductive prongs, one of the at least two conductive prongs disposed and configured to engage the conductive strip comprising the positive pole and one of the at least two conductive prongs disposed and configured to engage the conductive strip comprising the negative pole, the shelf connector further having an electric cord disposed and configured to supply and receive electric current to the lighting device, and the shelf connector oriented such that the shelf connector engages the conductive strips when the shelf engages the brackets and disengages the conductive strips when the shelf disengages the brackets. A preferred example of this embodiment will be discussed in conjunction with  FIGS. 1-7 . 
     In an alternative embodiment according to the present disclosure, the power supply and the shelf connector may be modified to provide a “no-gap” or “almost-no-gap” system wherein there is substantially no space between the rear edge of the shelf and the existing gondola wall, pegboard or non-pegboard. In this embodiment, the power supply is modified such that an insulated inner upright is provided that fits within the gondola upright, and the conductive strips may be placed on one or both sides of the inner upright. The inner upright is designed such that the conductive strips are positioned so that the shelf brackets (even if made of conductive material) are unable to contact the conductive strips. In this embodiment, the shelf connector is modified in its design such that the at least two spring loaded conductive prongs do not contact the shelf brackets (even if made of conductive material), yet fully contact the conductive strips located in the inner upright. A preferred example of this embodiment will be discussed in conjunction with  FIGS. 8-14 . 
     In another embodiment according to the present disclosure, the power supply and the shelf connector may be modified such that a wireless power transfer system is provided for powering the lighting on shelf and/or gondola surface. In this embodiment, inductive coupling between a transmitter and receiver comprises the power transfer system. The transmitter provides the power for transfer, while the receiver controls power provided to the output load. This wireless power transfer system allows for power to be transmitted to the load, e.g., an LED strip by providing transmitters along a conductive strip adhered/attached to a gondola surface. The conductive strip can be adhered to the front or the back of the gondola surface to provide a “small gap” and no “gap” system, respectively. In another example of this embodiment, the transmitter can be located remotely from the receiver at a distance, and/or the receiver can be closely associated with, such as away from the gondola surface or adjacent, e.g., wired directly to, the load, so as to eliminate the need for intervening and associated wiring, or incorporated as a component part of, the load, e.g. an LED strip, to accomplish the same result. This latter embodiment provides for a less cumbersome and sleeker appearance and simplified engineering and construction. An example of this embodiment will be discussed in conjunction with  FIGS. 15-18 . 
     These and other aspects of the present disclosure will become known to those of skill in the art form the detailed description which follows. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a front right side perspective view of a gondola and shelf having applied thereto a low profile C-channel strip of the present disclosure;  FIG. 1A  is an enlarged view of section “A” of  FIG. 1 ; and  FIG. 1B  is an enlarged view of section “B” of  FIG. 1 ; 
         FIG. 2  is a bottom view of the gondola and shelf of  FIG. 1  showing the electrical connection of an LED strip by a C-channel strip, a B-plug and a wire tube of the present disclosure; and  FIG. 2A  is an enlarged view of section “A” of  FIG. 2 ; 
         FIG. 3  is a bottom perspective view (looking down from above) showing the electrical connection of an LED strip by a B-plug and wire tube of the present disclosure; and  FIG. 3A  is an enlarged view of section “A” of  FIG. 3 ; 
         FIG. 4  is a front view of a C-channel strip of the present disclosure;  FIG. 4A  is a side view along line “A” of  FIG. 4 ;  FIG. 4B  is an enlarged view of section “A” of  FIG. 4 ;  FIG. 4C  is a cross-section view through line “C”-“C” of  FIG. 4B ;  FIG. 4D  is a cross-section view through line “D”-“D” of  FIG. 4C ; and  FIG. 4E  is a cross-sectional view through line “E”-“E” of  FIG. 4B ; 
         FIG. 5  is a detailed view of a wire tube to of the present disclosure; 
         FIG. 6  is a perspective view, in partial “phantom” relief, of a B-plug of the present disclosure; 
         FIG. 7  is an exploded view of the B-plug of  FIG. 6 ; 
         FIG. 8  is a front view of gondola showing a first alternative embodiment of the present disclosure;  FIG. 8A  is a cross-sectional view through line “A”-“A” of  FIG. 8 ; and  FIG. 8B  is an enlarged view of section “B” of  FIG. 8A ; 
         FIG. 9  is a right side perspective view of the gondola of  FIG. 8 ;  FIG. 9A  is an enlarged view of section “A” of  FIG. 9 ; and  FIG. 9B  is an enlarged view of section “B” of  FIG. 9 ; 
         FIG. 10  is a bottom view of the gondola of  FIG. 8 ; and  FIG. 10A  is an enlarged view of section “A” of  FIG. 10 ; 
         FIG. 11  is an exploded view of the gondola assembly of  FIGS. 8-10 ; 
         FIG. 12  is a side view of an inner upright of the first alternative embodiment of the present disclosure;  FIG. 12A  is an enlarged view of section “A” of  FIG. 12 ; and  FIG. 12B  is an enlarged cross section view through line “B”-“B” of  FIG. 12 ; 
         FIG. 13  is a right side perspective view of a B-plug of the first alternative embodiment of the present disclosure; 
         FIG. 14  is an exploded view of the B-plug of  FIG. 13  of the first alternative embodiment of present disclosure; 
         FIG. 15  is a schematic diagram of a wireless power transfer system diagram of the second alternative embodiment of the present disclosure;  FIG. 15A  is a perspective view of a wireless transfer power system transmitter and receiver of the present disclosure;  FIG. 15B  is a front view of a receiver/transmitter coil with electrical leads of the present disclosure; and  FIG. 15C  is a side view of the receiver/transmitter coil of  FIG. 15B ; 
         FIG. 16  is a front right side perspective view of a gondola, shelf, and vertical transmitters strip showing the wireless power transfer system of the second alternative embodiment of the present disclosure;  FIG. 16A  is an enlarged view of section “A” of  FIG. 16 ; and  FIG. 16B  is an enlarged view of section “B” of  FIG. 16 ; 
         FIG. 17  is a bottom perspective view of the gondola, shelf, and vertical transmitter strip of  FIG. 16 ; and  FIG. 17A  is an enlarged view of section “A” of  FIG. 17 ; and 
         FIG. 18  is an exploded view of a receiver of the wireless power transfer system according to the second alternative embodiment of the present disclosure 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to the  FIGS. 1-7 , there is shown an overall view of a preferred example of one embodiment of the low voltage plug and play display system of the present disclosure. In the description that follows, like elements will be denoted by like reference numbers. 
       FIG. 1  shows a typical gondola system  100  comprised of one left gondola upright  110 , one right gondola upright  115 , one deck  120 , one pegboard/pegboard support system  125 , and at least one shelf  130 . Each gondola upright  110 ,  115  includes a set of evenly spaced support slots  135  for accepting shelf support brackets  140 , as is standard in the art. Pegboard/pegboard support system  125  includes substantially evenly spaced horizontal rows and vertical columns of pegboard holes  145 . Also shown in  FIG. 1  is a C-channel strip  150 , which affixes vertically to pegboard holes  145  by locking pins  410  (see, e.g.,  FIG. 4A ).  FIG. 1A  shows the electrical connections made by a wire/cord  155  between C-channel strip  150  and a power adapter  160 . Power adapter  160  converts AC 110V-220V or other AC voltage (from a source not shown) to low-voltage DC 12V or DC 24V or other DC current. The low-voltage DC 12V or DC 24V or other DC current is conducted through left and right C-channels  151  and  152 , respectively, of C-channel strip  150  to a B-plug  165  and, via wire tube  170 , to LED strip (not shown in  FIGS. 1, 1A and 1B ), as will be described in conjunction with other FIGS. Power adapter  160  is usually placed beneath deck  120  so as to be not visible. As a result of the wiring from power adapter  160  through to B-plug  165  and then to LED strip (not shown), a complete conductive electric circuit is created. 
       FIG. 2  is a bottom view of the gondola and shelf of  FIG. 1  showing the connection of C-channel strip  150  to shelf  130 .  FIG. 2A  is an enlarged view of section “A” of  FIG. 2 . Shelf  130  has a front edge  131  and a rear edge  132 . The underside of shelf  130  also generally includes one or more support bars  133  for supporting weight disposed on the top side of shelf  130 . Disposed proximal front edge  131  and rear edge  132  are rows of evenly spaced (along X and Y axes) holes  131   a  and  132   a , respectively. Disposed at each end of shelf  130  is shelf bracket  140 .  FIG. 2A  shows an LED device  210  (such as an LED strip or LED tube) disposed on the bottom side of shelf  130 . Placement of LED device  210  on the bottom side of shelf  130  serves to illuminate display merchandise (not shown) on the top side of a lower shelf (not shown). An electrical cord  215  consists of two electrical wires, one for making contact with the “positive” C-channel ( 151  or  152 ) of C-channel strip  150  and the other for making contact with the “negative” C-channel ( 151  or  152 ) of C-channel strip  150 , passing through wire tube  170 , as will be described in more detail in conjunction with  FIG. 5 . As noted, one wire of electrical cord  215  is connected to the positive pole of LED device  210  and the other wire of electrical cord  215  is connected to the negative pole of LED device  210 . Wire tube  170  has a front foot  220  and a rear foot  225 . Front foot  220  is connected to one or more front holes  131   a  and rear foot  225  is connected to one or more rear holes  132   a , respectively, using push pins  230 . Electrical cord  215  passes through wire tube  170  from B-plug  165  to LED device  210 . LED device  210  is affixed to the underside of shelf  130  between front foot  220  (on the right side of shelf  130 , as shown) and a matching metal panel similar to front foot  220  on the left side of shelf  130  (not shown) by magnets (not shown) disposed at each end of LED device  210 . 
       FIG. 3  is a bottom view (looking down at bottom) of shelf  130  and  FIG. 3A  is an enlarged view of section “A” of  FIG. 3 .  FIG. 3A  shows in detail the electrical connections between LED device  210 , electrical cord  215 , wire tube  170  and B-plug  165 . All of LED device  210 , electrical cord  215 , wire tube  170  and B-plug  165  are insulated as will be discussed in conjunction with other FIGS., and all of LED device  210 , electrical cord  215 , wire tube  170  and B-plug  165  are either assembled with shelf  130  in advance of installation, as an integrated unit, or installed at the site. The positions of LED device  210 , electrical cord  215  and wire tube  170  and B-plug  165  can be adjusted at the installation site before shelf  130  is placed onto gondola  100 . B-plug  165  is secured to shelf  130  via pushpins  230  inserted into back holes  132   a  proximal back edge  132  of shelf  130 . As mentioned previously, wire tube  170  is secured to shelf  130  at front foot  220  and rear foot  225  also by pushpins  230  inserted into front holes  131   a  and rear holes  132   a , respectively. Front holes  131   a  and rear holes  132   a  help position wire tube  170  and B-plug  165  accurately with respect to C-channel strip  150 . Also, holes  640  on the base panel  610  of B-plug  165  and holes  520  on foot  220  and on foot  225  (see  FIGS. 5 and 6 ) are elliptical in shape which assists in easy installation of front foot  220 , rear foot  225  and B-plug  165 . B-plug  165  has four electrical poles  300  facing toward pegboard/pegboard support system  125 . Electrical poles  300  are inserted directly into C-channel strip  150 , which is a fixed to pegboard/pegboard support  125  (as will be described in conjunction with  FIG. 4 ) and connected to a power source (not shown). As will be discussed in conjunction with other FIGS., wire tube  170  is placed alongside inner underside surface of shelf support bracket  140  in order to place B-plug  165  to allow insertion of electrical poles  300  into C-channel strip  150  easily and firmly while holding shelf  130  by shelf support brackets  140 . At the same time, wire tube  170  placed alongside inner underside surface of shelf support bracket  140  provides more merchandising space beneath shelf  130 , and added protection for electrical cord  215 . No wire or electrical cord other than electrical cord  215  is exposed to human touch. During installation, one can hold both shelf brackets  140  and simultaneously insert B-plug  165  electrical poles  300  into left C-channel  151  and right C-channel  152  of C-channel strip  150 . Therefore, one can complete installation of shelf  130  onto gondola  100  in a single action while having LED device  210  working immediately. 
       FIGS. 4-4E  show details of the structure of C-channel strip  150 .  FIG. 4  shows a front view of C-channel strip  150  having disposed at opposite ends thereof a bottom cap  415  and a top cap  416 . One C-channel strip  150  stands vertically aside left gondola upright  110  or right gondola upright  115  and is held in place in pegboard holes  145  by the use of pins  410  that secure C-channel strip  150  to pegboard/pegboard support  125 . Preferably, pins  410  are disposed in pairs as shown in  FIG. 4A  and are spaced so as to occupy vertically adjacent pegboard holes  145  (generally spaced on 1″ centers, as is known in the art). Also preferably, each pair of pins  410  is spaced every 24″ (or other distance selected as desired) vertically and pins  410  (or each set of two pins  410 ) are aligned, one atop another. Bottom cap  415  and top cap  416  each has associated therewith a single pin  410 .  FIG. 4A  shows a side view of C-channel strip  150  of  FIG. 4 .  FIG. 4B  shows an enlarged detail of section “B” of  FIG. 4 .  FIG. 4B  shows one pair of C-channels, i.e., left C-channel  151  and right C-channel  152 , each of which comprises a flat and thin conductive panel  151   a  and  152   a , respectively, made of a conductive material, such as copper or aluminum. C-channel strip  150  is electrically conductive from bottom cap  415  to top cap  416  due to right C-channel  152  and left C-channel  151 . Each pin  410  is affixed to C-channel strip  150  and locked thereto by a locking pin  420 . Bottom cap  415  (as is top cap  416 ) is secured to C-channel strip  150  by a locking pin  425 .  FIG. 4C  shows a cross-section of the structure of  FIG. 4B  through line “C”-“C”.  FIG. 4D  is a cross-sectional view through line “D”-“D” and illustrates the electrical connections from, e.g., power adapter  160  to right C-channel  152  and left C-channel  151 . One wire  430  of cord  155  connects to left C-channel  151  from power adapter  160  and one wire  431  of cord  155  connects to right C-channel  152  from power adapter  160 .  FIG. 4E  shows a cross-section through line “E”-“E” of details of the construction and design of C-channel strip  150 . C-channel strip  150  comprises one integral C-channel frame  440  that secures left C-channel  151  and right C-channel  152 , a plastic cap  445  that encloses connections of wires  430 ,  431  to left C-channel  151  and right C-channel  152 , pin  410  and pin holding base  450 . Both conductive left C-channel  151  and right C-channel  152  are insulated by C-channel frame  440  and plastic cap  445 . Optionally, other than the use of pins  410 , C-channel strip  150  can be affixed onto the wall, pegboard/pegboard support  125  or any surface without a hole for accepting pins  410  by the use of adhesives, tape, or other adhesion methods known to those of skill in the art that can be put on the back of C-channel strip  150  that is placed against a wall or other surface. 
       FIG. 5  shows the structure of wire tube  170 . Wire tube  170  comprises one outer tube  510  and one inner tube  515 . Inner tube  515  telescopes within outer tube  510  thereby allowing for easy adaptation of wire tube  170  to various depths of shelf  130  and positions of supporting bars  133 . In the embodiments shown in previous FIGS., front foot  220  was associated with outer tube  510  and rear foot  225  was associated with inner tube  515 . Of course, these relationships can be easily reversed. In the embodiment shown in  FIG. 5 , front foot  220  and rear foot  225  each includes two holes  520  for accepting pushpins  230  (see, e.g.,  FIG. 3A ). Of course, the number of holes  520  can be varied according to design choice. Holes  520  are always, generally, elliptical for easy installation. Outer tube  510  and inner tube  515  can, of course, be made of any appropriate material including metal and/or plastic. Electrical cord  215  that provides electric current to LED device  210  passes through wire tube  170 , as indicated. In the embodiment shown in  FIG. 5 , each of outer tube  510  and inner tube  515  have a slot  525 , and each slot  525  is configured to be superimposed with respect to the other. Superimposed slots  525  are provided for ease of accepting electrical cord  215  during assembly and installation of shelf  130  and gondola  100 . Of course, in a less preferred embodiment, wire tube  170  need not be provided with slots  525  in outer tube  510  and inner tube  515  for accepting electrical cord  215 . If slots  525  are not provided, electrical cord  215  may be threaded through the hollow interior  530  of outer tube  510  and inner tube  515 . 
       FIG. 6  shows in perspective view, and in partial “phantom” relief, the detail of the structure of B-plug  165 . B-plug  165  comprises a base panel  610 , a box  615 , a cap  620 , and four electric poles  300 . Four electrical poles  300  rather than two electrical poles are employed to ensure the contact between C-channel panels  151   a ,  152   a  and electrical poles  300  for conductive purpose. A magnetic ring  625  is secured into place on base panel  610  by a base locking pin  630 . In the embodiment shown, base panel  610  is secured to box  615  with four (4) base screws  635 . Four holes  640  are also provided in base panel  610  for the insertion of pushpins  230  through holes  640  into matching rear holes  132   a  of shelf  130 . Holes  640  are designed in the preferred embodiment as the elliptical slots, thus allowing for alignment of electric poles  300  with left C-channel  151  and right C-channel  152  of C-channel strip  150 . Electric poles  300  connect to two (2) conductive panels  645  disposed on a side of box  615  opposite the ends of the electric poles  300 . Cap  620  is secured to box  615  using cap screw  650 , while conductive panels  645  are secured in place using conductive panel screws  655 . Electric poles  300  each have associated with it a conductive head  660  and a conductive spring  665 . Conductive head  660  and conductive spring  665  allow for sufficient variation in contact points between electric poles  300  and left C-channel panel  151   a  and right C-channel panel  152   a  of C-channel strip  150 , thereby ensuring complete electrical contact between electric poles  300  and left C-channel panel  151   a  and right C-channel panel  152   a  of C-channel strip  150 . A socket  670  and a plug  675  are connected to conductive panels  645  via wires  710  (see,  FIG. 7 ) affixed to electric tabs  715  (see,  FIG. 7 ) of socket  670 . Threaded end  720  of socket  670  passes through a hole  725  (see,  FIG. 7 ) in outer wall  730  (see,  FIG. 7 ) of cap  620 . Electrical cord  215  is provided as part of plug  675  during manufacture. Socket  670  and plug  675  are secured in place via retaining nut  680 . Once installed, electric current passes from power adapter  160  through cord  155  into wires  430 ,  431  and into left C-channel panel  151   a  and right C-channel panel  152   a , respectively. Thereafter, electric current passes from left C-channel panel  151   a  and right C-channel panel  152   a  to electric poles  300  and conductive head  660  and conductive springs  665  to conductive panels  645 . Following that, the electric current passes through wires  710  (see,  FIG. 7 ) to electrical tabs  715  (see,  FIG. 7 ) and socket  670  to plug  675  and electrical cord  215 , supplying electric current to LED device  210 . 
       FIG. 7  is an exploded view of B-plug  165 , with elements of B-plug identified and showing the flow of electric current in the direction of arrow A (DC 24V) from left C-channel  151  and right C-channel  152  through B-plug  165  and out through arrow B to LED device  210 . 
     The dimensions of C-channel strip  150  are designed to fit a standard peg board/pegboard support  125  holes in which the center-to-center distance of the holes is 1″, both vertically and horizontally. Also standard, the diameter of each hole is ¼″. Thus, for example, C-channel strip  150  can be 24″ or other length, 1″ or less in width and approximately ¼″ thick or less. These dimensions can be adjusted to suit gondola systems of various manufacturers. The dimensions of B-plug  165  are based upon the dimensions of the matching C-channel strip  150 . The selection of the appropriate thickness of C-channel strip  150  is such as to accommodate the gap that is present between rear edge  132  of shelf  130  and the surface of pegboard/pegboard support  125  when support brackets  140  are inserted into support slots  135 . It is a critical requirement to have a thin C-channel strip  150  to adapt to the narrow gap of about ¼″ or less between rear edge  132  of shelf  130  and the surface of wall of gondola. Thus, C-channel strip can accommodate standard shelf/bracket and gondola tolerances (i.e., spacing between rear edge  132  of shelf  130  and surface of wall of gondola), without modification of the shelf/bracket dimensions to allow for placement of the C-channel strip. In operation, the low-voltage plug and play display system of the present disclosure is designed to provide LED lighting to standard shelving, achieving three goals: (1) to be able to install a shelf onto a gondola by inserting shelf brackets into a gondola upright in a single action; (2) to provide electrical wiring wherein, visually, no wire or cord is exposed (in this regard, C-channel strip  150  and B-plug  165  are important aspects to this goal, as is wire tube  170  that houses electrical cord  215 ); and (3) all conductive parts must be insulated and/or disposed away from possible contact by installation personnel and/or persons buying merchandise placed on the shelves. 
     An alternative embodiment of the present disclosure will now be described in conjunction with  FIGS. 8-14 , below. 
       FIG. 8  shows a front view of gondola system  100  comprising left upright  110 , right upright  115 , pegboard/pegboard support system  125 , deck  120  and shelf  130 .  FIG. 8A  is an overhead view of a cross-section through line “A”-“A” of  FIG. 8 , showing the joint of shelf bracket  140 , right gondola upright  115 , a plastic inner upright  810  and an alternative B-plug  840 .  FIG. 8B  is an enlarged view of section “B” of  FIG. 8A  showing the details of plastic inner upright  810  placed within right gondola upright  115 . Two vertical conductive strips, right conductive strip  815  and left conductive strip  820  pass the length of plastic inner upright  810  from top to bottom. Right conductive strip  815  and left conductive strip  820  are separated and insulated from one another by right plastic inner upright wall  825 , left plastic inner upright wall  830  and center tab  835 . As can be seen from  FIG. 8B , plastic inner upright  810  has a mirror image opposing side that is provided to accommodate those instances where gondola system  110  is provided with shelves  130  on both side of pegboard/pegboard support system  125 . Adjustable electric poles  845  of B-plug  840  connect to right and left conductive strips,  815  and  820 , respectively. B-plug  840  is connected to holes  132   a  proximal rear edge  132  of shelf  130  using push pins  230  in a manner similar to that described with respect to  FIG. 2A . Shelf bracket hooks  141  (see,  FIG. 9B ) are separated from contact with adjustable electric poles  845  by a distance, due to the “offset” configuration and design of B-plug  840  as will be discussed in conjunction with, e.g.,  FIGS. 9-11 and 13-14 . Right gondola upright  115  is separated from adjustable electric poles  845  by plastic electric pole holder  850  that inserts into and through support slot  135  and allows adjustable electric poles  845  to contact right conductive strip  815  and left conductive strip  820  without contacting right upright  115 . All of right conductive strip  815 , left conductive strip  820  and adjustable electric poles  845  are insulated as will be understood and appreciated by those skilled in the art from the previous discussion. Inner upright  810  is inserted into right gondola upright  115  (in the embodiment described in  FIG. 8 ) from the top. Generally, gondola uprights have an empty core forming a space. The shape, structure and dimensions of inner upright  810  can be selected to fit the gondola upright according to manufacturer to thus ensure proper and insulated conductive connections between adjustable electric poles  845  and right and left conductive strips  815  and  820 , respectively. 
       FIG. 9  shows a right side perspective view of the gondola of  FIG. 8 .  FIG. 9A  shows an enlarged section “A” of  FIG. 9 , and is generally similar to  FIG. 1A  discussed above.  FIG. 9A  shows power adapter  160  that converts AC 110V or other high voltage AC power to DC 24V or other low voltage DC power and supplies the DC 24V power via wires  155  to right and left conductive strips  815  and  820 , respectively, in inner upright  810 , as will be described in more detail in conjunction with  FIG. 12 . Generally, the AC 110V power supply source and power adapter  160  are placed out of view under gondola deck  120  and are connected by wires  155  from power adaptor  160  to right and left conductive strips  815  and  820 .  FIG. 9B  shows an enlarged section “B” of  FIG. 9  showing shelf bracket  140  and B-plug  840  positions. B-plug  840  is firmly attached to the inner side of shelf bracket  140  by permanent magnet rings or other methods as will be further described in conjunction with, e.g.,  FIGS. 13-14 . For descriptive purposes, B-plug can be considered to have two sections, upper section  840   a  and lower section  840   b . Upper section  840   a  is affixed to inner side of shelf bracket  140 . Lower section  840   b  is designed and constructed in the embodiment shown as disposed below and offset to upper section  840   a . This design of B-plug  840  allows for lower section  840   a  that includes adjustable electric poles  845  to contact adjustable electric poles  845  with right and left conductive strips  815  and  820  yet have adjustable electric poles  845  enter inner upright  810  below the lowest bracket hook  141  so that adjustable electric poles  845  insert into the support slot  135  closest to the lowest bracket hook slot  141  to maintain aesthetic appeal and still connect to right and left conductive strips  815  and  820  when shelf bracket  140  engages support slots  135  of gondola upright  115 . 
       FIG. 10  shows a bottom view of the gondola system  110 .  FIG. 10A  shows an enlarged section “A” of  FIG. 10 .  FIGS. 10 and 10A  show the electric connections generally shown in  FIGS. 2 and 2A , with the only differences being B-plug  840  rather that B-plug  165  and the use of inner upright  110  rather than C-channel  150  and conductive strips  151  and  152 . 
       FIG. 11  is an exploded view of the gondola system of  FIGS. 8-10  with like elements denoted by like numerals. 
       FIG. 12  is a front view of inner upright  810 .  FIG. 12A  is an enlarged view of section “A” of  FIG. 12  showing the detailed structure of the electric connections of wires  155  to right and left conductive strips  815  and  820  disposed in inner upright  810 . The two vertical conductive strips, right and left conductive strips  815  and  820  run the length of inner upright  810  and are connected to DC24V or other low DC voltage by wires  155  from power adapter  160  (not shown) and insulated by the plastic tabs  1210  of inner upright  810 . A socket connecting the conductive strips  815  and  820  to wires  155  is placed at the bottom of inner upright  810  before installation. The plug of the adapter output cord comprises two wires  155  inserted into the socket. This connection is done before the inner upright is inserted into the gondola upright, and wires  155  are simply retrieved and brought out from gondola upright slot  135  proximal deck  120 .  FIG. 12B  is a cross-section of a preferred inner upright  810  through line “B”-“B” of  FIG. 12 . This preferred inner upright  810  was first described with respect to  FIG. 8B . As was described in  FIG. 8B  with respect to the preferred embodiment of inner upright  810 , right conductive strip  815  and left conductive strip  820  are separated and insulated from one another by right plastic inner upright wall  825 , left plastic inner upright wall  830  and center tab  835 . As can be seen from  FIGS. 8B and 12B , plastic inner upright  810  has a mirror image opposing side that is provided to accommodate those instances where gondola system  110  is provided with shelves  130  on both sides of pegboard/pegboard support system  125 . In  FIG. 12B , the mirror images of right plastic inner upright wall  825 , left plastic inner upright wall  830  and center tab  835  have been designated  1215 ,  1220  and  1225 , respectively. The mirror images of inner upright  810  are separated by central wall  1230 . As shown in  FIG. 12B , inner upright  810  has left C-shape wall  1235  and right C-shape wall  1240 . All portions of inner upright  810  are made of plastic non-conductive material. Left C-shape wall  1235  and right C-shape wall  1240  in conjunction with central wall  1230  form two chambers  1245 , with one opening  1250  of each chamber matching the gondola upright slots  135 . In the preferred embodiment, opening  1250  is no larger than the gondola upright slot  135 . Right plastic inner upright wall  825 , left plastic inner upright wall  830  and center tab  835  are designed so as to separate left conductive strip  820  from right conductive strip  815  and to form a channel to insert conductive strips  815  and  820 . In the embodiment shown in  FIGS. 8B and 12B , there are four channels for four conductive strips, i.e. two channels per chamber to place two conductive strips, one in each channel. All channels and chambers are insulated spaces. Dimensions of the inner upright  810  are designed to match the gondola upright, e.g.,  110  and  115 . Dimensions of right plastic inner upright wall  825 , left plastic inner upright wall  830  and center tab  835  are selected to form a comfortable and reliable channel in which to place conductive strips  815  and  820 . The insulated chamber is designed to accept the adjustable electric poles  845  of B-plug  840 . In the embodiment of inner upright  810  shown in  FIGS. 8B and 12B , left C-shape wall  1235  and right C-shape wall  1240  have curved edges  1255  to simplify insertion into gondola uprights. In an alternative embodiment, opening  1250  can traverse the entire length of inner upright  810  to simplify design costs and ensure matching with gondola upright slots  135 . 
     The shape, structure and dimensions of the inner upright  810  can be selected to fit any particular gondola upright and to ensure the conductive connections between adjustable electric poles  845  and conductive strips  815  and  820 . For example, the conductive strips can be placed on the left C-shape wall  1235  and right C-shape wall  1240  in cooperation with specially designed adjustable electric poles  845  of B-plug  840 . 
       FIG. 13  shows a right side perspective view of B-plug  840  of the alternative embodiment of the present disclosure. While similar in concept and function to B-plug  165  shown and described with respect to  FIGS. 6-7 , alternative B-plug  840  is designed specifically for use with inner uprights  810 . B-plug  840  has upper section  840   a  and lower section  840   b , the functions of which were described in detail in conjunction with  FIG. 9B . B-plug  840  is a multi-faced design having a plastic vertical side cap  1310  (also shown in  FIG. 14 ). There is a pair of adjustable electric poles  845  that are deployed in conjunction with plastic electric pole holder  850 . As described in conjunction with  FIG. 9B , electric pole holder  850  provides adjustable electric poles  845  with strong support as well as to providing adjustable electric poles  845  insulation from making electrical contact with metal gondola upright (e.g.,  115 ). A plurality (two shown in  FIGS. 13-14 ) of magnet rings  1315  are placed on one side wall of B-plug box  1320  as shown in  FIG. 13 . Magnet rings  1315  provide for attachment of upper section  840   a  of B-plug  840  on the inner side of shelf bracket  140 . Magnet rings  1315  are strong permanent magnets, and in the embodiment shown in  FIG. 13  are held in place by screws  1325 . There are other methods by which to attach B-plug  840  on the inner side of shelf bracket  140  that will be apparent to those of skill in the art, such as brazing, gluing, screwing, as well as other attachment methods. The output plug  1330  and output socket  1335  are located at the position as shown in  FIG. 13  so as to provide low voltage DC current to electric wire  215  (not shown) to LED strip  210  via wire tube  170 , as that current is conducted from right conductive strip  815  and left conductive strip  820  via adjustable electric poles  845 , as will be more fully described in conjunction with  FIG. 14 . The shape, structure and dimensions of B-plug  840  in this preferred embodiment are designed for the best fitting, spacing and performance in the embodiment shown. If conductive strips are placed on the left C-shape wall  1235  and right C-shape wall  1240  in cooperation with specially designed adjustable electric poles  845  of B-plug  840 , B-plug  840  will be designed to adapt to those changes, as will be apparent to those of skill in the art. 
       FIG. 14  shows an exploded view of the B-plug  840  of  FIG. 13 . B-plug  840  includes plastic B-plug box  1320 , plastic vertical side cap  1310 , a plastic electric pole case  1410 , output plug  1330 , output socket  1335 , magnet rings  1315  and screws  1325 . As shown in  FIG. 14 , the adjustable electric pole combination comprises plastic electric pole case  1410  with plastic electric pole holder  850 , one pair of adjustable electric poles  845 , two springs  1420  (one at the base of each adjustable electric pole  845 ), one pair of conductive panels  1430  with screws  1435 , and one locking hole  1440 . One end of each spring  1420  connects to one of each of the conductive panels  1430 , and the other end of each spring  1420  contacts one of each of the adjustable electric poles  845 . The conductive panels  1430  are connected to the rear wall of electric pole case  1410  by screws  1435 . Wires  1440  accept electric current from adjustable electric poles  845  via springs  1420  and conductive panels  1430  and conduct current to output plug  1330  and outlet socket  1335 , as shown in  FIG. 14 , and provide electric current to wire  215 . Electric pole case  1410  attaches on the plastic vertical side cap  1310  by inserting locking pin  1445  of the plastic vertical side cap  1310  into locking hole  1440  of electric pole case  1410 . Output socket  1335  is placed in the socket hole  1450  located on the left upper side of B-plug box  1320  as shown in  FIG. 14 . Magnetic rings  1315  are affixed onto magnet ring slots  1455  in the wall of B-plug box  1320  by screws  1325  as shown in  FIG. 13 . The total length of springs  1420  and adjustable electric poles  845  are designed to ensure the conductive connection between adjustable electric poles  845  and right conductive strip  815  and left conductive strip  820  of inner upright  110  when shelf bracket  140  engages gondola upright (e.g.  115 ). The total length of springs  1420  and adjustable electric poles  845  can be adjusted by different spring lengths to adapt the positions of gondola upright (e.g.,  115 ) and shelf bracket  140 . The shape, structure and dimensions of B-plug  840  are designed for the best fitting, spacing and performance in cooperation with gondola system  100  and to ensure the conductive connections between the adjustable electric poles  845  of B-plug  840  and right conductive strip  815  and left conductive strip  820  of inner upright  810 . In short, plug and play can be accomplished when shelf bracket  140  engages gondola upright  115 . The basic design and structure of B-plug  840  in this alternative embodiment of the present disclosure are principally functionally the same as in the embodiment described with respect to  FIGS. 1-7 , above. 
     A second alternative embodiment of the present disclosure will now be described in more detail in conjunction with  FIGS. 15-18 , below. 
       FIG. 15  shows a power transfer system diagram of the mechanism of wireless power transfer comprising, in general, two parts: a transmitter (TX)  1510  and a receiver (RX)  1520 . Transmitter (TX)  1510  receives power, AC or DC, from a system source  1530 . In the present disclosure, power is generally DC12V or other lower DC voltage that has been converted by an adaptor, e.g., adapter  160  (see,  FIGS. 1A and 15A ) from an AC 110V or other higher voltage system source  1530  is used. Power Conversion  1550  converts electrical power to wireless power signal. Transmitter (TX)  1510  generally comprises transmitter TX control  1560 , TX coil  1590  (see,  FIG. 15A ) with capacitor-resonance circuit that provides power  1540  to RX coil  1595  (see,  FIG. 15A ) with capacitor-resonance circuit of receiver (RX)  1520  via inductive coupling. TX control  1560  handles signal generation, electric switching and other functions. TX coil  1590  and capacitor-resonance circuit are designed for power transfer, as is known in the art. Receiver (RX)  1520  generally comprises RX control  1570 , RX coil  1595  with capacitor-resonance circuit to receive power from (TX) coil  1590  via inductive coupling. RX control  1570  provides functions of ballast, wave filter, voltage stabilization and other functions. RX coil  1595  and capacitor-resonance circuit are designed for power reception or power pick-up, as is known in the art. Power Pick-Up  1551  converts wireless power signal to electrical power. In short, receiver (RX)  1520  controls providing power to output load  1580  (e.g., LED device  210 ), transmitter (TX)  1510  provides power for transfer, and inductive coupling between the TX coil  1590  and RX coil  1595  transfers power. DC12V is loaded by RX receiver  1520  and conducted to, e.g., LED device  210 . 
       FIG. 15A  shows a structure for wireless power transfer according to the present disclosure. Adaptor  160  converts an AC110V or other higher AC voltage coming from wire  1591  to DC12V or other low DC voltage and provides that lower voltage to wires  1592 . Transmitter (TX)  1510  receives DC12V current from adaptor  160  via wire  1592  and transfers power  1540  via inductive coupling to RX receiver  1520  after TX control  1560  performs its functions. Receiver (RX)  1520  receives power transferred from transmitter (TX)  1510  by RX coil  1595  via inductive coupling, and then receiver (RX)  1520  conducts low DC voltage “working current” to, e.g., LED device  210  via wires  1593  after RX control  1570  performs its functions. The working distance “d” between transmitter (TX)  1510  and receiver (RX)  1520  will be dictated by the strength of the inductive coupling between transmitter (TX)  1510  and receiver (RX)  1520 . For example, in general for the embodiment shown in, e.g.,  FIGS. 16-17 , distance “d” may be around 4″. However, it is possible to have transmitter (TX)  1510  and receiver (RX)  1520  at other distances, and when the strength of in inductive coupling is properly selected and positioned distance “d” could be greater. In fact, it is envisioned that transmitter (TX)  1510  could be located at a remote location, and that receiver (RX) could be incorporated in, or affixed to, the load, e.g., LED device  210 , so that vertical strip  1610  and receiver box  1630  (see, e.g.,  FIG. 16 ), and the associated wiring and structure, described with respect to  FIGS. 16-17  such as, e.g., wire tube  170 , can be eliminated. 
       FIG. 15B  shows a front view of TX/RX coil  1590 / 1595  on a support  1596 . TX/RX coil  1590 / 1595  is connected to electric leads  1597  and  1598  that will be explained in more detail with respect to  FIGS. 16-16B .  FIG. 15C  shows a side view of TX/RX coil  1590 / 1595  on support  1596  and leads  1597 / 1598 . 
     Although TX coil  1590  and RX coil  1595  are shown as planar circular coils in  FIGS. 15A-15C , the specifications of the coil(s) can be designed to meet the requirements of the system and load. Planar coils or other coil designs can be selected as well as their dimensions. Coils can be made from solid conductive materials or can be printed on special paper, as is known in the art. Therefore, this alternative embodiment can be used for new gondola systems or retrofitting existing gondola systems. 
       FIG. 16  shows a typical gondola system  100  comprised of left gondola upright  110 , right gondola upright  115 , deck  120 , pegboard/pegboard support system  125 , and at least one shelf  130 . Each gondola upright  110 ,  115  includes a set of evenly spaced support slots  135  for accepting shelf support brackets  140 , as is standard in the art. Pegboard/pegboard support system  125  includes substantially evenly spaced horizontal rows and vertical columns of pegboard holes  145 . Also shown in  FIG. 16  is a transmitter (TX) strip  1610  that affixes vertically to pegboard/pegboard support  125  by double-faced adhesive tape or other methods.  FIG. 16A  shows the electrical connections made by a wires  1592  between power adapter  160  and transmitter (TX) strip  1610 . Power adapter  160  converts AC 110V-220V or other AC voltage (from a source not shown) to low-voltage DC 12V or other DC current. The low-voltage DC 12V or other DC current is conducted to wires  1620  running along an edge of transmitter (TX) strip  1610  through TX control  1560  for transfer to TX coil  1590  on support  1596  through leads  1597 / 1598 . DC 12V current will be provided by power transfer through TX coil(s)  1590  and inductive coupling between transmitter (TX)  1510  and receiver (RX)  1520  to RX coil  1595  and is conducted through receiver (RX) control  1570  and, via wire tube  170 , to LED strip (not shown in  FIGS. 16, 16A and 16B ), similarly to that described in conjunction with other FIGS., e.g.,  FIG. 2A . Power adapter  160  is usually placed beneath deck  120  so as to be not visible. As a result, a complete conductive electric circuit is created.  FIGS. 16A and 16B  show a front view of a section of transmitter (TX) strip  1610  comprising a plurality of TX coils  1590  connected in parallel. TX coils  1590 , in the embodiment shown in  FIGS. 16A and 16B , are placed about every 4″-10″ to meet the power transfer requirements of shelves  130  and LED devices  210 . Transmitter (TX) strip  1610  can be provided with an arrangement of a numbers of coils as shown in  FIGS. 16A and 16B , as well as can be provided with one coil running substantially from the bottom to the top of transmitter (TX) strip  1610 , depending on power transfer requirements, cost and part/chip development, considering both function and cost. There is a small gap between the surface of transmitter (TX) strip  1610  and receiver (RX) box  1630 , not direct contact, as will be more fully explained in conjunction with  FIGS. 17 and 17A . Transmitter (TX) strip  1610  can be placed on the front surface of pegboard/pegboard support  125  or behind pegboard/pegboard support  125 . 
       FIG. 17  is a bottom perspective view of gondola system  100  of  FIG. 16  showing the connection of receiver (RX) box  1630  to shelf  130 .  FIG. 17A  is an enlarged view of section “A” of  FIG. 17 . Shelf  130  has a front edge  131  and a rear edge  132 . The underside of shelf  130  also generally includes one or more support bars  133  for supporting weight disposed on the top side of shelf  130 . Disposed proximal front edge  131  and rear edge  132  are rows of evenly spaced (along X and Y axes) holes  131   a  and  132   a , respectively. Disposed at each end of shelf  130  is shelf bracket  140 .  FIGS. 17 and 17A  show an LED device  210  (such as an LED strip or LED tube) disposed on the bottom side of shelf  130 . Placement of LED device  210  on the bottom side of shelf  130  serves to illuminate display merchandise (not shown) on the top side of a lower shelf (not shown). An electrical cord  215  consists of two electrical wires, positive and negative, and conductively connects to receiver (RX) box  1630 , passing through wire tube  170 , as was described in more detail in conjunction with  FIG. 5 . As noted, one wire of electrical cord  215  is connected to the positive pole of LED device  210  and the other wire of electrical cord  215  is connected to the negative pole of LED device  210 . Wire tube  170  has a front foot  220  and a rear foot  225  (not shown in  FIGS. 17 and 17A , but see  FIGS. 2A, 3A and 5 ). Front foot  220  is connected to one or more front holes  131   a  and rear foot  225  is connected to one or more rear holes  132   a , respectively, using push pins  230  (see,  FIGS. 2A and 3A ). Electrical cord  215  passes through wire tube  170  from receiver (RX) box  1630  to LED device  210 . LED device  210  is affixed to the underside of shelf  130  between front foot  220  (on the right side of shelf  130 , as shown) and a matching metal panel similar to front foot  220  on the left side of shelf  130  (not shown) by magnets (not shown) disposed at each end of LED device  210 . Receiver (RX) box  1630  is placed in position so as to meet two considerations for the embodiment shown. First, TX coil  1590  and RX coil  1595  should be face-to-face to ensure optimal power transfer between the two. Second, transmitter (TX)  1510  and receiver (RX)  1520  should also be located within the spherical dimension of the inductive coupling field to further ensure optimal power transfer. Transmitter (TX) strip  1610  and receiver (RX) box  1630  are designed and built taking the above two factors into consideration. 
       FIG. 18  shows an exploded view of receiver (RX) box  1630 . Receiver (RX) box  1630  includes a plastic RX holder box  1810 , an RX box cap  1820 , RX coil  1595  with electric leads  1597 ,  1598  on base  1596 , RX control  1570 , base panel  1830 , output plug  1840  and output socket  1850 , magnet ring  1860  with associated base locking pin  1865  (for locking magnet  1860  into locking hole  1861  associated with magnet positioning cavity  1862 ) and base screws  1870  for passing through screw holes  1871  of base panel  1830  and fastening into associated screw holes  1872  of receiver (RX)  1630 . A cap screw  1880  passes through associated a cap locking pin  1881  for attaching RX box cap  1820  to RX holder box  1810 . RX box cap  1820  also has a socket hole  1890  for accepting output plug  1840  and output socket  1850 . Finally, base panel  1830  has a series of elliptical slots  1895  so that the position of receiver (RX) box  1630  in association with rear holes  132   a  can be readily adjusted. As shown in  FIG. 18 , RX control  1570  connecting both RX coil  1595  and socket  1850  and plug  1840  is placed within RX holder box  1810  below cap locking pin  1881  and connects to RX coil  1595  and socket  1850  and plug  1840  by wires  1593 . RX coil  1595  is placed on base  1596  that is designed and configured to act as a “cap” to associate with an opening  1896  of RX-holder box  1810 . Socket  1850  and plug  1840  are placed in socket hole  1890  on the side wall of RX box cap  1820  to connect wire  1593  (extending from plug  1840 ) to LED device  210 . RX-box cap  1820  affixes into RX-holder box  1810  by cap locking pin  1881  and cap screw  1880 . Base panel  1830  is placed on top of RX-holder box  1810  and affixed by base locking pin  1865  and base screws  1870 . Magnet ring  1860 , preferably a permanent magnet, is placed onto magnet positioning cavity  1862  after passing through locking hole  1861 . Receiver (RX) box  1630  is affixed on the bottom of shelf  130  by magnet ring  1860  and further locked by push pins  230  in rear holes  132   a . Of course, the sizes and shape of receiver RX box  1630  is subject to design considerations and can be changed accordingly. 
     As mentioned earlier, the transmitter coil can be designed and built in many ways including individual planer, elongate-vertical-strip-size, and others. The transmitter itself can be in a centralized location away from the location of the gondola(s) having the receiver(s) and the transmitter can be provided with a sufficiently large spherical inductive coupling field to control a group of receivers. Thus, one central transmitter can transfer power to a numbers of receivers to illuminate LED devices on a plurality of shelves. For example, the system can be designed so that one central transmitter can power all of the LED devices on the shelves of a 28′ gondola. 
     As will be appreciated, the low-voltage plug and play display system of the present disclosure is applicable for installation for gondola systems in general, including existing gondola walls and/or new gondola walls, pegboard or solid walls, as well as wooden, plastic or metal gondola walls. The low-voltage plug and play display system of the present disclosure may be adapted for gondola wall systems or for free-standing displays, and is suitable for shelving systems in general. In addition, the low voltage plug and play display system of the present disclosure is suitable for either retrofitting existing gondola systems or for installations of new gondola systems. 
     As can been seen from the discussion of the FIGS., the electricity-bearing elements of the present disclosure only come in electricity-transferring contact with other elements that are intended to carry electricity, and are prevented from contacting other such non-electricity carrying elements through contact with insulated materials, such as plastic clamps, channels, screws and the like. 
     While the present disclosure has been described with reference to one or more exemplary embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present disclosure. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the disclosure without departing from the scope thereof. Therefore, it is intended that the present disclosure not be limited to the particular embodiment(s) disclosed as the best mode contemplated, but that the disclosure will include all embodiments falling within the scope of the appended claims.