LIGHTING SYSTEM FOR A VENDING MACHINE

TECHNICAL FIELD [0001] This disclosure is generally directed to vending machines and, more specifically, to a lighting system for a vending machine.

BACKGROUND

[0002] The use of vending machines for providing various products, such as soft drinks or snacks, is well known. Typical vending machines provide lighting within the vending machine to illuminate the products that are available for purchase. Many of these machines employ fluorescent lighting for this purpose. Recently, some vending machines have used light emitting diodes (LEDs) instead of fluorescent or other conventional types of lighting in order to take advantage of the benefits of LEDs, which include reduced energy consumption, decreased heat production and increased lifetime. However, these vending machines have not been designed to maximize the effective lighting provided by the LEDs, resulting in vending machines that are not as efficient as possible.

SUMMARY

[0003] This disclosure is directed to a system for illuminating a product display area for a vending machine.

[0004] In a first embodiment, a vending machine includes a cabinet, or housing, having a product display area and a lighting system configured to provide light from multiple directions. The lighting system includes a light source and a reflective material. The light source extends along a first inner surface of the vending machine and is configured to emit a light towards the reflective material and towards a product display area located in an interior portion of the vending machine. The light source may include a plurality of light emitting diodes. The reflective material extends along a second inner surface of the vending machine and is adapted to reflect light emitted from the light source towards the product display area. The light emitted from the light source combines with the reflected light to illuminate the product display area.

[0005] In a second embodiment, a method includes emitting a light from a light source and reflecting the emitted light by a reflective surface. The light source extends along a first inner surface of a vending machine. The reflective material extends along a second inner surface of a vending machine. The light source may include a plurality of light emitting diodes. A product display area located in an interior portion of the vending machine is illuminated by combining light emitted from the light source with reflected light from the reflective surface.

[0006] In a third embodiment, a vending machine includes a a cabinet, e.g. a housing structure, a door, a light source extending along a first inner surface of the door and a reflective material extending along a second inner surface of the door. The light source may include a

plurality of light emitting diodes. The light source is configured to emit a light towards the reflective material and an interior portion of the vending machine cabinet. The reflective material is adapted to reflect light emitted from the light source towards the interior portion of the cabinet. The reflected light combines with the emitted light to illuminate the interior portion of the cabinet.

[0007] Other technical features may be readily apparent to one skilled in the art from the following figures, descriptions and claims.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] For a more complete understanding of this disclosure, reference is now made to the following description, taken in conjunction with the accompanying drawing, in which:

[0009] FIGURE Ia illustrates a vending machine with a lighting system according to an embodiment of the present disclosure;

[0010] FIGURE Ib illustrates a simple block diagram of a top view of a vending machine with a lighting system and light beam trajectory according to an embodiment of the present disclosure;

[0011] FIGURE Ic illustrates an exemplary lens according to an embodiment of the present disclosure; [0012] FIGURE Id illustrates exemplary reflective louvers according to an embodiment of the present disclosure; and

[0013] FIGURE 2 illustrates a block diagram of a controller according to an embodiment of the present disclosure.

DETAILED DESCRIPTION

[0014] FIGURE 1, discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged vending machine. [0015] FIGURE 1 illustrates a vending machine 100 comprising a lighting system 105 according to an embodiment of the present disclosure. For the illustrated embodiment, the lighting system 105 is provided on a door 110 of the vending machine 100. However, it will be understood that the lighting system 105 may be otherwise located within the vending machine 100 without departing from the scope of the present disclosure. In some embodiments, the lighting system 105 is provided on the interior sides of a housing of the vending machine 100 housing (e.g. not on the door 110) . In such embodiments, as the door 110 opens, the lighting system 105 remains fixed in relationship with the vending machine 100 and does not move with the door 110. In other embodiments, the vending machine includes a glass viewing panel separate from the door 110. In such embodiments, the lighting system 105 may be disposed on an interior portion of the housing of vending machine 100 in such location as to be adjacent to the glass viewing panel.

[0016] The lighting system 105 comprises a light source

115 and a reflective surface 120. For one embodiment, the light source 115 may comprise a plurality of light emitting diodes (LEDs) . For a particular embodiment, the light source 115 may comprise a single 39-inch 4100 Kelvin degree light bar. The light source 115 is mounted vertically

inside the door 110. For this embodiment, the light source 115 is mounted at an angle with respect to the surface of the door 110 in order to direct light onto products within the vending machine 100. For example, for one particular embodiment, the light source 115 may be mounted at an angle of about two and one half (2.5) degrees towards the interior of the vending machine 100. In such embodiment, the light is directed inward away from a door layer. The door layer is a planar area defined the back surface of the front facing portion of the door 110 (e.g. the back of the glass portion of the door 110). In other embodiments, the light source 115 may be mounted within a range of zero (0) degrees to five (5) degrees.

[0017] In one embodiment, the light source 115 includes a lens 150, illustrated in Figure Ic, such as, but not limited to, a Fresnel lens, a compound lens or series of lenses, to assist in directing light towards the reflective surface 120. In such embodiments, the lens 150 is configured so as to transition a diverging light beam to be a collimated light beam. The collimated light beam is directed along a path towards the reflective surface 120. As such, the light traverses a path along a beam layer towards the reflective surface 120. The beam layer is defined by a straight line between the light source and a longitudinal centerline (e.g. a vertical line for a vertical facing reflective surface 120 and a horizontal line for a horizontal facing reflective surface 120) .

[0018] In another embodiment, the light source 115 includes a series of reflective louvers 170, illustrated in Figure Id, to assist in directing light towards the reflective surface 120. In such embodiments, the reflective louvers 170 are configured so as to transition a diverging light beam to be a collimated light beam. The

collimated light beam is directed along a path towards the reflective surface 120. As such, the light traverses a path along the beam layer towards the reflective surface 120. [0019] The reflective surface 120 comprises a white, vacuum-formed liner situated along one or more inner surfaces 125a-c of the door 110. The inner surfaces 125a-c are disposed along the interior portion of the door frame.

However, it will be understood that the reflective surface 120 may comprise any suitable reflective material and may be situated in any suitable location on the vending machine 100. The reflective surface 120 is operable to reflect the light emitted by the light source 115. In this way, light provided by the light source 115 in one direction is reflected to illuminate the interior of the vending machine 100 from multiple directions, thereby maximizing the effective lighting provided by the light source 115 and improving the visibility of products inside the vending machine 100. [0020] In the embodiment illustrated in Figure Ib, the reflective surface 120 is operable to reflect light within a range extending from zero (0) degrees (e.g. back towards the light source 115) to ninety (90) degrees (e.g. towards the interior of the vending machine 100) . It would be understood that illustration of the light source 115 as comprising a flat emitting surface merely is exemplary and that such emitting surface may be curved, angled or coupled to a lens, as discussed herein above with respect to Figure Ia. As such, the light 130 emitted by light source 115 is reflected 135 by reflective surface 120 towards light source 115 and the interior of the vending machine 100. In other embodiments, the inner surfaces 125a-c of the door 110 are situated at an angle of about two and one half

(2.5) degrees towards the interior of the vending machine 100. In additional embodiments, the inner surfaces 125a-c of the door 110 may be situated to face towards the interior of the vending machine within a range of zero (0) degrees to five (5) degrees.

[0021] Referring now to Figure 2, a somewhat simplified illustration of a lighting controller device 200 according to one embodiment of the present disclosure is depicted. One embodiment of the controller 200 that may be used to operate the light source 115 is illustrated. The controller 200 may be a computer, or any other device capable of transmitting, processing, and/or receiving signals via wireless and/or wireline communication links. The controller 200 includes a central processing unit ("CPU") 205, a memory unit 210 (e.g. a computer readable medium) , an input/output ("I/O") device 215, and a network interface 220. The network interface may be, for example, one or more network interface cards (NICs) that are each associated with a media access control (MAC) address. The components 205, 210, 215, and 220 are interconnected by one or more communication links 225 (e.g., a bus) . It is understood that the controller 200 may be differently configured and that each of the listed components may actually represent several different components. For example, the CPU 205 may actually represent a multiprocessor or a distributed processing system; the memory unit 210 may include different levels of cache memory, main memory, hard disks, and remote storage locations; and the I/O device 215 may include monitors, keyboards, and the like. Alternatively, one or more components may be implemented in a single component such as a microcontroller. The network interface 220 enables the controller 200 to connect to a network (not illustrated) .

[0022] The controller 200 electrically couples to a power control 250. The power control 250 is coupled between the light source 115 and a power source (not illustrated) . The power control 250 is adapted to sever an electrical path between the power source and the light source 115, (e.g. the power control is adapted to turn-off the light source 115) in response to commands, or electrical signals, received from the controller 200.

[0023] The lighting system 105 is electrically coupled to the controller 200. The controller 200 comprises software and a plurality of programming instructions stored in memory 210 to operate the light source 115. In one embodiment, the controller 200 is operable to turn-off the light source 115 based on a time of day. In another embodiment, the controller 200 is configured to turn-off the light source 115 based on a day of the week. In yet another embodiment, the controller 200 is operable to turn- off the light source 115 based upon an occurrence of a period of inactivity. For example, if no purchases have occurred from the vending machine 100 within a preceding half hour period, the controller 200 may turn off the light source 115 to conserve energy consumption.

[0024] In some embodiments, the controller 200 is configured to adjust a level of illumination created by the light emitted from the light source 115. In one embodiment, the controller 200 turns-off a portion of the light source 115. For example, the light source 115 may be a plurality of LEDs. The controller 200 turns-off only a portion of the plurality of LEDs such that every other LED is turned-off. It would be understood that turning-off every other LED is exemplary and that the controller 200 is configured to turn-off varying increments of LEDs such as, but not limited to, one LED for every three, two LEDs for

every three, or other combinations. In another embodiment, the lighting system 105 comprises two or more light sources 115. In such embodiment, the controller 200 is configured to turn-off one of the light sources 115 to adjust the level of illumination. In yet another embodiment, the controller 200 is configured to use pulse width modulation to adjust the level of illumination. The controller 200 is configured to reduce an amount of power supplied to the light source 115 via the power controller 250. The controller 200, via the power controller 250, modulates a duty cycle of the power source to control the amount of power sent to the light source 115. As such, the level of illumination created by the light emitted from the light source 115 adjusts in relation to an adjustment of the amount of power sent to the light source 115.

[0025] It may be advantageous to set forth definitions of certain words and phrases used throughout this patent document. The term "packet" refers to any information- bearing communication signal, regardless of the format used for a particular communication signal. The terms "application," "program," and "routine" refer to one or more computer programs, sets of instructions, procedures, functions, objects, classes, instances, or related data adapted for implementation in a suitable computer language. The term "couple" and its derivatives refer to any direct or indirect communication between two or more elements, whether or not those elements are in physical contact with one another. The terms "transmit," "receive," and "communicate," as well as derivatives thereof, encompass both direct and indirect communication. The terms "include" and "comprise," as well as derivatives thereof, mean inclusion without limitation. The term "or" is inclusive, meaning and/or. The phrases "associated

with" and "associated therewith, " as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, or the like. The term "controller" means any device, system, or part thereof that controls at least one operation. A controller may be implemented in hardware, firmware, software, or some combination of at least two of the same. The functionality associated with any particular controller may be centralized or distributed, whether locally or remotely.

[0026] Although the present disclosure has been described with an exemplary embodiment, various changes and modifications may be suggested to one skilled in the art. It is intended that the present disclosure encompass such changes and modifications as fall within the scope of the appended claims.