UV cleaning system and method

Abstract

The present invention relates to a system and method for UV cleaning. The system includes an ultraviolet (UV) light source, a power supply configured to provide power to the UV light source, and a photochromic indicator associated with a component, the photochromic indicator being in a first state, the UV light source being configured to change the photochromic indicator from the first state to a second state, the second state indicating that the component has been cleaned, the second state being visible to the naked eye under ambient lighting.

Description

Technical Field

[0001] The present application relates to systems and methods for UV cleaning. Background Art

[0002] Current surface cleaning methods may not provide a reliable indication that the cleaning process has been performed. Consequently, neither users of these surfaces nor those responsible for performing the cleaning process can reliably confirm that the surfaces have been adequately cleaned. Therefore, a need remains for systems and methods that reliably clean and confirm that a cleaning procedure has been performed. Summary of the Invention

[0003] The present disclosure provides a system, in one aspect, comprising: an ultraviolet (UV) light source; a power supply configured to provide power to the UV light source; and a photochromic indicator associated with a component, the photochromic indicator being in a first state, the UV light source being configured to change the photochromic indicator from the first state to a second state, the second state indicating that the component has been cleaned, the second state being visible to the naked eye under ambient lighting.

[0004] In one aspect, in combination with any of the example systems above or below, the system includes the component being formed of a material selected from the group consisting of: polymers, polycarbonates, metals, composites, nano-reinforced materials, organic materials, woven fabrics, and combinations thereof.

[0005] In one aspect, in combination with any of the example systems above or below, the system includes the photochromic indicator being in a form selected from the group consisting of: a sticker, a thread, a woven fabric, an organic material, a polycarbonate element, a polymer element, a metal element, a coating, and combinations thereof.

[0006] In one aspect, in combination with any of the example systems above or below, the system includes the photochromic indicator being included in a tray cover, a headrest cover, a seat cover, an armrest cover, an outlet cover, or a headphone cover.

[0007] In one aspect, in combination with any of the example systems above or below, the system includes: the photochromic indicator includes a reversible photochromic pigment.

[0008] In one aspect, in combination with any of the example systems above or below, the system includes: the photochromic indicator including an irreversible photochromic pigment.

[0009] In one aspect, in combination with any of the above or below example systems, the system includes: the UV light source includes a wireless device, a wired device, a device removably coupled to a wall of an aircraft cabin, a device removably coupled to a ceiling of an aircraft cabin, a device removably coupled to a seat of an aircraft cabin, or a device removably coupled to a floor of an aircraft cabin.

[0010] In one aspect, in combination with any of the example systems above or below, the system includes the photochromic indicator being invisible to the naked eye when in the first state.

[0011] In one aspect, in combination with any of the example systems above or below, the system includes a UV light source emitting a wavelength from about 222 to about 254 nanometers (nm).

[0012] In one aspect, in combination with any of the example systems above or below, the system includes: the photochromic indicator is included in a cover including at least one hole, the cover being configured to be coupled to the component by one or more of an adhesive, a magnetic mechanism, a mechanical mechanism, a hook and loop mechanism, or a combination thereof.

[0013] In one aspect, in combination with any of the example systems above or below, the system includes: the component includes a gaming system.

[0014] The present disclosure provides, in one aspect, a method comprising: removably coupling a first photochromic indicator to a component, the first photochromic indicator being in a first state; applying an ultraviolet (UV) light source to the component, and in response to the UV light source, the first photochromic indicator changing from the first state to a second state, the second state indicating that the component has been cleaned, the second state being visible to the naked eye under ambient light; detaching the first photochromic indicator from the component; disposing of the first photochromic indicator; and removably coupling a second photochromic indicator to the component, the photochromic indicator being in the first state.

[0015] In one aspect, in combination with any of the above or below example methods, the method includes including the photochromic indicator in a single-use component that is removably coupled to the component by adhesive, magnetic mechanism, hook and loop mechanism, mechanical mechanism, or combinations thereof.

[0016] In one aspect, in combination with any of the above or below example methods, the method includes the photochromic indicator including two or more photochromic pigments, each of the two or more photochromic pigments having at least one of a different concentration or a different composition.

[0017] In one aspect, the present disclosure provides a method comprising: (a) applying an ultraviolet (UV) light source to a component having a first photochromic indicator in a first state. Furthermore, in the method, in response to the UV light source being applied to the first photochromic indicator and the first photochromic indicator absorbing energy from the UV light source, the first photochromic indicator changes from the first state to a second state, the second state indicating that the component has been cleaned; and after a predetermined period of time, in response to the energy from the UV light source absorbed by the first photochromic indicator dissipating, the first photochromic indicator changes from the second state to the first state.

[0018] In one aspect, in combination with any of the above or below example methods, the method includes removably coupling a first photochromic indicator to the component prior to applying the UV light source, the first photochromic indicator including an irreversible photochromic pigment.

[0019] In one aspect, in combination with any of the above or below example methods, the method includes: (b) reapplying a UV light source to the first photochromic indicator after the first photochromic indicator changes from the second state to the first state. In response to (b) the first photochromic indicator changing from the first state back to the second state, the component is indicated to have been cleaned.

[0020] In one aspect, in combination with any of the above or below example methods, the method includes performing (a) and (b) a plurality of times, and the first photochromic indicator includes at least one reversible pigment.

[0021] In one aspect, in combination with any of the above or below example methods, the method includes, after a plurality of repetitions of performing (a) and (b): detaching the first photochromic indicator from the component; processing the first photochromic indicator; and associating a second photochromic indicator with the component, the second photochromic indicator being in a first state.

[0022] In one aspect, in combination with any of the above or below example methods, the method includes the first photochromic indicator comprising a brand identifier.

[0023] The present disclosure provides an assembly comprising: a photochromic indicator associated with a component, the photochromic indicator being in a first state under ambient light and being configured to be in a second state under ambient light after exposure to a UV light source, the first state being different from the second state, the photochromic indicator being configured to change from the first state to the second state in response to the UV light source to indicate that the component has been cleaned.

[0024] In one aspect, in combination with any of the example components above or below, the UV light source is configured to emit a wavelength from about 222 nm to about 254 nm.

[0025] In one aspect, in conjunction with any of the example assemblies above or below, the photochromic indicator is configured as a disposable, single-use element.

[0026] In one aspect, in conjunction with any of the above or below example assemblies, the component is formed of a material selected from the group consisting of: a polymer, a polycarbonate, a metal, a composite material, a nano-reinforced material, an organic material, a woven fabric, and combinations thereof.

[0027] In one aspect, in combination with any of the example assemblies above or below, the photochromic indicator is associated with the component via a mechanism selected from the group consisting of: an adhesive mechanism, a mechanical mechanism, a magnetic mechanism, a hook and loop mechanism, and combinations thereof.

[0028] The present disclosure provides a photochromic indicator comprising a photochromic pigment that is in a first state under ambient light and is configured to be in a second state under ambient light after being exposed to a UV light source, the first state being different from the second state, the photochromic pigment being configured to change from the first state to the second state in response to the UV light source.

[0029] The present disclosure provides a photochromic indicator including a photochromic pigment configured to change from a first state to a second state in response to a UV light source emitting a wavelength from about 222 nm to about 254 nm.

[0030] The present disclosure provides a photochromic indicator, which includes: the photochromic pigment is a reversible photochromic pigment.

[0031] The present disclosure provides a photochromic indicator, which includes: the photochromic pigment is an irreversible photochromic pigment.

[0032] The present disclosure provides a photochromic indicator in a form selected from the group consisting of: an adhesive, a thread, a woven fabric, an organic material, a polycarbonate element, a polymer element, a metal element, a coating, and combinations thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order that the manner in which the above-described features may be understood in detail, a more particular description, briefly summarized above, may be had by reference to example aspects, some of which are illustrated in the accompanying drawings.

[0034] Figure 1 A system configured to clean one or more components according to aspects of the present disclosure is shown.

[0035] Figure 2 is an illustration of an example photochromic indicator according to aspects of the present disclosure.

[0036] Figure 3 is a flow chart of a method of cleaning using a photochromic indicator according to aspects of the present disclosure.

[0037] Figure 4 is a flow chart of a method of cleaning using a photochromic indicator according to aspects of the present disclosure.

[0038] Figures 5A to 5C A photochromic indicator is shown at various operations of a cleaning method according to aspects of the present disclosure.

[0039] Figures 6A to 6F Another photochromic indicator is shown at various operations of a cleaning method according to aspects of the present disclosure. DETAILED DESCRIPTION

[0040] The present disclosure relates to cleaning, such as disinfecting and sterilizing, one or more surfaces of a component using ultraviolet (UV) light. In some examples, the cleaning discussed herein may include sterilizing. As used herein, "sterilization" is the process of rendering one or more surfaces of a component free of bacteria, viruses, or other living microorganisms. Compared to "low-touch" surfaces such as ceilings or other hard-to-reach surfaces, the surfaces discussed herein may be "high-touch" surfaces that are contacted by multiple parties such as seats, trays, counters, touch screens, keyboards, or game consoles. In some examples, such "high-touch" surfaces may be present on aircraft such as commercial aircraft. In some examples, UV light may be used alone, and in other examples, UV light may be used in combination with one or more cleaning solvents to remove contaminants such as dirt and oil, as well as biological components such as viruses and bacteria, making it less likely that the cleaned surface will transfer biological contaminants between and among users of the high-touch surface.

[0041] In currently employed cleaning processes, one or more photoluminescent elements can be used to indicate that rooms and surfaces, such as lavatories on aircraft, have been cleaned. However, currently employed photoluminescent processes can typically be verified in a darkened cabin or other area where all light sources can be deactivated or otherwise covered, with the photoluminescent strip emitting light from absorbed photons. Furthermore, some currently employed systems use photoluminescent indicators that can be charged by a variety of light sources, such as ambient light, in addition to the cleaning source, such as UV light. Thus, the photoluminescent indicator may illuminate due to being charged by these light sources, thereby undesirably providing an erroneous reading of ultraviolet (UV) exposure and the resulting cleaning status.

[0042] The high touch surfaces discussed herein can include components of an aircraft, such as those in a cabin, crew area, or cockpit, and a gaming system. As discussed herein, a "gaming system" is a system configured for playing games in an entertainment venue or for use in a non-gaming environment, such as an arcade or home system for all ages, including an electronic sports system. It is further envisioned that other high touch surfaces in high traffic areas, such as touch screens and / or keyboards, card readers, or other surfaces or combinations of surfaces in retail stores, shopping malls, schools, offices, rental cars, ride sharing, accommodation sharing, financial institutions, (financial institutions or other locations) ATMs, hospitals, hotels / motels / resorts, or other locations, can be cleaned using the systems and methods discussed herein. These high touch surfaces can also include door handles, desktops, countertops, keyboards, computer mice, touch screens / GUIs on phone booths or mobile devices, other areas of mobile devices and / or mobile device boxes, hangers, seats, tableware, containers, glassware, or other items included in surfaces that can be touched by multiple parties during use.

[0043] Using the systems and methods discussed herein, a photochromic indicator is used to indicate to the party responsible for cleaning the component, as well as to parties who may use the component, when a component including one or more high-touch surfaces has been cleaned. Thus, the systems and methods discussed herein instill confidence that cleaning has been performed, and in some examples, confirmation and auditability that cleaning has been performed. Cleaning can be defined by a predetermined schedule set by the party that owns or leases the component(s), or by local, state, or governmental regulations.

[0044] As used herein, a "photochromic indicator" is a single-use, multiple-use, semi-permanent, or permanent element that includes one or more photochromic pigments. The photochromic pigment is configured to change from a first state to a second state for a predetermined period of time in response to absorbing UV light. For example, the photochromic pigment may change from transparent to a color after absorbing certain UV light. The photochromic pigment may be in the form of a liquid, a solid (e.g., a powder), a colloid (e.g., a slurry), or other forms or combinations of forms. By way of example, the photochromic pigment may be used in the indicator as a liquid or gel reservoir, a paint or other coating, incorporated into an adhesive, or added to a polymer, polycarbonate, metal, or textile fabric element. As used herein, the terms "paint" and "coating" are used interchangeably to refer to various types of materials (e.g., photochromic indicators) applied to one or more surfaces of a component in one or more layers that can be removed and replaced chemically, mechanically, or by a combination of means.

[0045] The first and second states of the photochromic indicator discussed herein can be confirmed and visible to the naked eye under ambient light, such that the area including the photochromic indicator may not darken in order to confirm cleaning. As used herein, "ambient light" is light present in a room from natural light (e.g., the sun) or existing room lighting, in contrast to the light used to illuminate a particular aspect of an area within a room or other environment. As used herein, something that is "visible to the naked eye" can be seen without magnification, including when one or more people are wearing prescription glasses. In other aspects of the present disclosure, the change from the first state to the second state can be confirmed via an application on a mobile device or via a tactile change, for example, if the party desiring confirmation of the change is visually impaired or desires to create a record of the change using a mobile device. The ability to verify that a surface has been cleaned using the photochromic indicator discussed herein provides assurance to the party cleaning the surface as well as the party using the surface.

[0046] Depending on the example, the photochromic pigment included in the photochromic indicator can be selected and configured to be reversible or irreversible. As used herein, with respect to a photochromic indicator including a photochromic pigment, for example, in the case of a polymer, polycarbonate, metal, or textile fabric element or coating thereon having the photochromic pigment included therein, "reversible" means that application of UV light to the photochromic indicator causes it to change from a first state to a second state. In this example, the photochromic indicator changes from the second state back to the first state after a predetermined period of time, which can range from approximately 10 minutes to approximately 24 hours. In other examples, the predetermined period of time can range from approximately 30 minutes to approximately 3 hours. In yet another example, the predetermined period of time in the first state can range from approximately 2 hours to approximately 6 hours. As used herein, "about" means within + / - 5% of the target value, maximum value, or minimum value.

[0047] In one example, the first state of a photochromic indicator may include text and / or graphics in a first color visible to the naked eye. In another example that may be combined with other examples herein, the first state of a photochromic indicator may be invisible to the naked eye. In some examples, the first state may alternatively or additionally include a tactile element, such that the photochromic indicator has one tactile configuration in the first state and a different tactile configuration (e.g., bumps, grooves, or smoothness) in the second state. In some examples, the second state may include a second, different color visible to the naked eye. The second state may include graphics and / or text indicating that the associated component or surface has been cleaned. In one example that may be combined with other examples herein, the second state may also include a brand logo, such that the brand logo (logo) is visible in the second state but not in the first state. In some examples, the first state of a photochromic indicator may be a first color, and the second state may be a different color, such that the photochromic indicator is visible in both states. In other examples, the first state of the photochromic indicator may include branding in a first color, and the second state may include branding in a different color and additional graphics and / or text that is not visible in the first state. The additional graphics and / or text may indicate that the component associated with the photochromic indicator has been cleaned. As discussed herein, a photochromic indicator may be "associated" with a component by being removably coupled, permanently coupled, or integrally formed with the component, as described below in Figure 1 As described in.

[0048] In some examples, photochromic indicators may be associated with multiple-use or semi-permanent components, such as inserts in tray tables or armrests in an aircraft's cabin or cockpit. These may be referred to as "multi-use" photochromic indicators because they can change from a first state to a second state in response to absorption of UV light, then change back to the first state as the absorbed UV energy dissipates. UV light can then be reapplied to again change the photochromic indicator from the first state back to the second state. After a predetermined number of recleanings, the photochromic indicator can be removed, disposed of, refurbished, and recycled, or replaced with a new, previously unused photochromic indicator. Similarly, during refurbishment of the associated component, a semi-permanent photochromic indicator can be repeatedly changed from the first state to the second state multiple times before ultimately being replaced. For example, in an aircraft, where seats may be replaced or refurbished according to a maintenance schedule, photochromic indicators may be incorporated into the textile fabric or other material comprising the seat and refurbished as part of the maintenance process. Examples of permanent components that may use photochromic indicators are those that are typically replaced entirely rather than repainted / recoated, refinished, or otherwise refurbished due to damage or scheduled maintenance procedures, redesigns, mergers or acquisitions (where branding may change), or other policies or regulations. The photochromic pigment or element (e.g., a photochromic indicator) including one or more photochromic pigments should be selected to be stable under the various environmental conditions on the aircraft during flight.

[0049] Furthermore, as used herein, with respect to photochromic pigments or elements including photochromic pigments, for example, in the case of polymeric, polycarbonate, metal, or textile fabric elements having photochromic pigments included therein, "irreversible" means that UV light is applied to the photochromic indicator to cause it to change from a first state to a second state, and that the indicator does not return to the first state during the useful life of the photochromic indicator. That is, the photochromic indicator including the irreversible pigment is removed / refurbished or disposed of before the indicator changes back to the first state. In some examples, the pigment or the irreversible photochromic indicator including the pigment may be included in an element that is a single-use, disposable component. These single-use, disposable components may include headrest covers, tray table covers, table covers (e.g., in restaurants or food halls), seat covers, covers for components used in bathrooms, or other components suitable for various applications. The second state may also reflect branding and / or information indicating the UV treated state and / or that the photochromic indicator and / or the component with which it is associated is for single use (e.g., a headrest or tray table cover for a passenger or pilot sitting on an aircraft, bus, or train).

[0050] Figure 1A system 100 configured to clean one or more components according to an example of the present disclosure is shown. System 100 may include a UV light source 102 and a power source 104. UV light source 102 may be configured as a standalone wireless device that includes power source 104, which may be a rechargeable battery. As discussed in detail below, UV light source 102 may be configured to emit wavelengths from approximately 100 nanometers (nm) to approximately 400 nm. In some examples, the UV light source may be configured to emit wavelengths from approximately 222 nm to approximately 254 nm. In some examples, UV light source 102 may have an elongated geometric shape known as a "rod," a circular geometric shape, a polygonal geometric shape, or a combination of two or more geometric shapes. The UV light discussed herein may be UVA, UVB, UVC, or a combination of UV light types. UV light source 102 may include multiple LED lights. In other examples, UV light source 102 may be configured as a wired device that may or may not be connected to power source 104 during use. In yet other examples, the UV light source 102 can be configured as a self-propelled or manually driven device or collection of devices that can be coupled to the ceiling of the area to be cleaned and / or the floor of the area to be cleaned. In other examples, the UV light source 102 can be included in a robotic or manually driven cleaning device that may or may not include a power source 104. In one example, the UV light source 102 is included in a device that can be programmed to move along a predetermined path to clean multiple surfaces.

[0051] The UV light source 102 can be configured to clean a component 110 having one or more surfaces. As discussed above, the component 110 can be located in an airplane, automobile, train, bus, office, restaurant, retail location, residence, hotel / resort, hospital, or other location. The photochromic indicator 110A can be associated with the component 110 to form an assembly. A "removably coupled" photochromic indicator 110A can be coupled to and removed from the component 110 without damaging the component 110. For example, a cover, sticker, paint / coating, or other form of photochromic indicator 110A can be provided. The removably coupled photochromic indicator 110A can also be a semi-permanent photochromic indicator 110A that can be used in multiple cleaning cycles as discussed herein, such that after the semi-permanent photochromic indicator changes from a first state to a second state and back to the first state a predetermined number of times, it is replaced with a new photochromic indicator. A "permanently attached" photochromic indicator 110A can be formed separately from component 110, then subsequently attached to component 110 and used multiple times, but cannot be removed from component 110 without causing damage to component 110. This can be, for example, one or more threads in the form of a woven fabric (e.g., textile) that is associated with the seat or headrest after manufacture. An "integrated" photochromic indicator 110A can be molded, cast, or otherwise incorporated into component 110. The type of component 110 and the type of maintenance performed on component 110 can enable the integral photochromic indicator 110A to be removed and replaced or refurbished / recycled. Thus, the photochromic indicator 110A can be in the form of an adhesive, thread, woven fabric, organic material (e.g., wood- or plant-based material such as paper), polycarbonate element, polymer element, metal element, coating, and combinations thereof.

[0052] The UV light source 102 can be configured to operate at a certain wavelength or within a certain range, such that one or more photochromic pigments included in the photochromic indicator 110A change from a first state to a second state in response to absorbing energy from the UV light source 102. Depending on the example, the one or more photochromic pigments included in the photochromic indicator 110A can be reversible or irreversible, as discussed above. In some examples, the photochromic indicator 110A can be configured to include two or more types (colors) of photochromic pigments, or two or more concentrations of the same type (color) of photochromic pigments, such that the photochromic indicator 110A has a color gradient that develops in one or more directions over time. In one example, the color gradient can be configured to indicate to a cleaner or cleaning system sensor when the photochromic indicator 110A changes from the first state to the second state. In another example that may be combined with other examples herein, when the photochromic indicator 110A changes from the second state back to the first state, the color gradient can be configured to indicate to a user of the cleaner or cleaning system sensor or associated component 110 as an early warning that it may be desirable to reclean the component 110.

[0053] The photochromic indicator 110A can be formed from one or more materials configured and approved for use in one or more of aircraft, automobiles, hospitals, restaurants, retail locations, hotels / resorts, or other locations discussed herein. In some locations, the photochromic indicator 110A will therefore be formed from one or more materials configured to resist moisture, fire, a wide pH range, heat, cold, or other conditions without separating or becoming detached from associated components. In some examples, the photochromic indicator 110A is formed from a material selected to prevent the release of toxic gases during a fire.

[0054] Component 110 can be formed from one or more of a polymer, a polycarbonate, a metal, a composite material, a nano-reinforced material, an organic material (including plant or wood materials such as paper), a textile fabric, and a combination of materials. In various examples, component 110 can include a tray cover, a headrest cover, a seat cover, an armrest cover, an outlet cover, a headphone cover, a keyboard or computer mouse, a table, a chair, a work surface, a touch screen or other element of a mobile device or kiosk, a tray insert, an armrest insert, a seat insert, or a cover configured to cover one or more surfaces of a gaming system, including an arcade or electronic sports gaming system.

[0055] In some examples, the system 100 includes a server computer 106 having non-transitory memory configured to store a plurality of logic in the form of cleaning programs, cleaning schedules, and cleaning records. This information and other information may be stored on one or more data stores 108, which may be part of a cloud computing system. The UV light source 102 and the power supply 104 may communicate with and / or be controlled by the server computer 106. In some examples, a mobile device 112, such as a phone, tablet, personal data assistant, laptop, or wearable smart device, may include an application configured to determine when the photochromic indicator 110A is in a first state or a second state.

[0056] System 100 may be used in various cleaning methods in which different types of photochromic indicators are associated with different types of components, including as discussed below.

[0057] Figure 2 is an illustration of an example photochromic indicator 200 according to an example of the present disclosure. As described above, the photochromic indicator can take the form of a variety of geometries and materials and can be single-use, multiple-use, semi-permanent, or permanent. The photochromic indicator 200 is defined in part by an abutting edge 202. In some examples, the abutting edge 202 can be a reinforcing material including a polymer, polycarbonate, metal, or other material or combination of materials. The example photochromic indicator 200 includes a plurality of apertures of various geometries, including a circular aperture 204, a polygonal aperture 208, a triangular aperture 210, a horizontal slot 212, and a vertical slot 214. The photochromic indicator 200 also includes a plurality of apertures 206 of different geometries that can be configured as clusters.

[0058] In one example, the photochromic indicator 200 can be formed from an organic material, such as wood or paper, a polymer, polycarbonate, metal, a composite material, or a combination of materials. One or more photochromic indicator dots 216 can be located at various locations on the photochromic indicator 200, each including one or more photochromic pigments that change from a first state to a second state in response to application of a UV light source, as discussed above. In other examples, the entire surface 218 of the photochromic indicator 200 includes one or more photochromic pigments, possibly in a gradient, such that the entire surface 218 changes from the first state to the second state in response to application of a UV light source. The photochromic indicator 200 can include branding specifically for casinos, electronic sports brands, restaurants or bars, including arcades, banks, or other institutions that employ the device to indicate that their associated components have been cleaned.

[0059] The photochromic indicator 200 can be coupled to a component using an adhesive, a mechanical mechanism, a magnetic mechanism, a hook and loop mechanism, a friction- or press-fit-based device, or a combination thereof. Each of the holes 204, 206, 208, and 210 can be configured to allow access to a control or selection feature of the associated component. In another example, one or more of the horizontal slot 212 and the vertical slot 214 can be configured to accept transactions from a presence card of various payment methods, including gaming cards. In another example, one or more of the holes 204, 206, 208, and 210 or the slots 212 and 214 can be configured to implement RFID or other wireless communications, such as receiving information from a payment instrument (virtual or physical), a gaming card or application, or other payment instrument.

[0060] The photochromic indicator 200 can be part of a system such as system 100 and can be configured to include reversible or irreversible pigment(s) or pigment gradients, depending on the example. In some examples, the gradient can include a combination of irreversible and reversible photochromic pigments. In some examples, the gradient can include only irreversible or reversible photochromic pigments. In one example, the photochromic indicator 200 can be removably attached to a slot machine or other gaming machine in a casino or other location where gaming is facilitated. In another example, the photochromic indicator 200 can be attached to gaming equipment in an arcade outside of a casino, such as an electronic sports arcade. While the photochromic indicator 200 is shown here as a strip, in other examples, it can be configured to wrap around a handle, steering wheel, joystick, or other gaming control system, where the device owner or user desires to ensure that the components associated with the photochromic indicator 200 have been cleaned.

[0061] Figure 3 A flow chart of a cleaning method 300 using a photochromic indicator is shown according to an example of the present disclosure. Figures 5A to 5C The photochromic indicator is shown at various operations of method 300. At operation 302, a photochromic indicator in a first state is removably coupled to a component to be cleaned (302 - removably couple photochromic indicator in first state to component). Figure 5AAn example of a first state 504 of the photochromic indicator 502 is shown, wherein no brand identifier or other markings are visible. The removable connection at operation 302 can be achieved using an adhesive, a mechanical mechanism, a magnetic mechanism, a hook and loop mechanism, a friction- or press-fit-based device, or a combination of these devices. At operation 304, a UV light source is applied to the component comprising the photochromic indicator (304 - Apply UV Light Source). In a specific example, a UV light source such as a rod having a wavelength of, for example, from about 275 nm to about 395 nm can be used. In other examples, a UV light source such as a rod having a wavelength of from about 260 nm to about 285 nm can be used. In other examples, a UV light source such as a rod having a wavelength of from about 222 nm to about 254 nm can be used.

[0062] A UV light source with a predetermined wavelength may be applied to the component including the photochromic indicator for a predetermined period of time. In one aspect, the predetermined period of time may be from about 5 seconds to about 2 minutes. In another aspect, the predetermined period of time may be from about 10 seconds to about 60 seconds. In yet another aspect, the predetermined period of time may be from about 15 seconds to about 45 seconds. The UV wavelength used in operation 304 may be from about 100 nm to about 400 nm. In one example, UVA, having a wavelength of from about 315 nm to about 400 nm, is used. In another example, UVB, having a wavelength of from about 280 nm to about 314 nm, is used. In yet another example, UVC, having a wavelength of from about 100 nm to about 279 nm, is used. In yet another example, the UV wavelength used in operation 304 is from about 222 nm to about 254 nm. In other examples, combinations or overlapping ranges of UVA, UVB, and UVC may be used.

[0063] Figure 5B The UV light source 102 is shown applied to the photochromic indicator 502. At operation 306, in response to the photochromic indicator absorbing the UV wavelength from the UV light source 102, the photochromic indicator changes from the first state (504) to the second state (506, as shown in FIG. Figure 5C (shown in FIG. 306 ) (306 —photochromic indicator changes to second state). The change from the first state to the second state can be visually confirmed by the naked eye, for example, without magnification, black light, or other visual aid or assistance. Figure 5C In the example of FIG. 5 , when the photochromic indicator 502 is in the second state 506 , application of the UV light source 102 causes a graphic 508 to appear in the photochromic pigment.

[0064] In other examples, a mobile device including an application configured to confirm the presence of a graphic or color change, or both, can be used to confirm the change from the first state to the second state. In other examples, a tactile sensation can be used to confirm the change from the first state to the second state. In this example, the photochromic indicator includes an irreversible pigment and is intended for single use. The photochromic indicator can take the form of a seat cover, armrest cover, headrest cover, tray table cover, power outlet cover, touch screen or touch screen cover or housing, table cover, retail or restaurant cabinet cover, or other disposable cover for travel, retail, food service, financial institutions, or in shared workspaces such as conference rooms or other workspaces that can be used by different individuals. The second state indicates that the component has been cleaned and can be used, for example, for a flight, train ride, bus ride, or gaming / e-sports experience. Thus, after use of the associated component, at operation 308, the photochromic indicator is separated from the component (308—Separating the photochromic indicator from the component), and at operation 310, the photochromic indicator is disposed of (310—Disposing or refurbishing / recycling the photochromic indicator). In some examples, instead of being disposed of at operation 310, the photochromic indicator may be refurbished or recycled, depending on the material(s) of which the photochromic indicator is composed. At operation 312, a new, refurbished, or recycled photochromic indicator in a first state is removably coupled to the component (312—Replacing the photochromic indicator with another photochromic indicator in the first state).

[0065] Figure 4 is an illustration of a flow chart of a cleaning method 400 using a photochromic indicator. Figures 6A to 6F A photochromic indicator is shown during various operations of method 400. In method 400, at optional operation 402, a photochromic indicator in a first state is removably coupled to a component to be cleaned (402—Removably Couple Photochromic Indicator in First State to Component). The removable coupling at operation 402 can be accomplished using an adhesive, a mechanical mechanism, a magnetic mechanism, a hook-and-loop mechanism, a friction- or press-fit-based device, or a combination of devices. Operation 402 is optional because, in some examples, the photochromic indicator is integrally formed with the component or is a semi-permanent or permanent aspect of the component. Figure 6A One example of a first state 604 of the photochromic indicator 602 is shown, wherein the brand identifier or other indicia is not visible to the naked eye.

[0066] At operation 404, a UV light source is applied to the component including the photochromic indicator (304—Apply UV Light Source). The UV light source can be applied to the component including the photochromic indicator at a predetermined wavelength for a predetermined period of time. In one aspect, the predetermined period of time can be from about 5 seconds to about 2 minutes. In another aspect, the predetermined period of time can be from about 10 seconds to about 60 seconds. In yet another aspect, the predetermined period of time can be from about 15 seconds to about 45 seconds. The UV wavelength used at operation 404 can be from about 100 nanometers (nm) to about 400 nm. In one example, UVA, having a wavelength from about 315 nm to about 400 nm, is used. In another example, UVB, having a wavelength from about 280 nm to about 314 nm, is used. In yet another example, UVC, having a wavelength from about 100 nm to about 279 nm, is used. In other examples, overlapping ranges of UVA, UVB, and UVC wavelengths can be used at operation 404. In a specific example, a UV light source such as a rod having a wavelength of, for example, from about 275 nm to about 395 nm can be used. In other examples, a UV light source such as a rod having a wavelength of, for example, from about 260 nm to about 285 nm can be used. In other examples, a UV light source such as a rod having a wavelength of, for example, from about 222 nm to about 254 nm can be used.

[0067] Figure 6B A UV light source is shown applied to the photochromic indicator 602. At operation 406, in response to the photochromic indicator absorbing the UV wavelength from the UV light source 102, the photochromic indicator changes from the first state (604) to the second state (eg, Figure 6C 606) (406 - photochromic indicator changes to second state). The change from the first state to the second state can be visually confirmed by the naked eye, for example, without magnification. In the example of FIG. 6C , when the photochromic indicator 602 is in the second state 606, the application of the UV light source 102 causes a pattern 608 to appear in the photochromic pigment. The photochromic indicator 602 includes a reversible photochromic pigment. Therefore, at operation 408, the photochromic indicator 602 changes back to the second state. Figure 6D The first state 604 is shown (408 - photochromic indicator changes back to first state). This change at operation 408 may occur after a predetermined amount of time. Additionally, as discussed above, the photochromic indicator 602 may include a display that indicates that the photochromic indicator 602 is changing back to the first state 604 ( Figure 6D ) of a single pigment or pigment gradient.

[0068] In this example, as shown by the arrow from operation 408 to operation 404, Figure 6E The UV light source (e.g. Figure 6B and Figure 6E The UV light source 102 shown in FIG. 1 is used to change the photochromic indicator 602 from the first state 604 back to the second state ( Figure 6F 606 in the figure), so that the graphic 608 reappears in response to the application of the UV light source in each cycle indicated by the arrow. This cycle of applying the UV light source to the photochromic indicator 602 to change it from the first state (604) to the second state (606) can occur in multiple repetitions. The multiple repetitions can be a predetermined number of times, from two to more than 100, depending on factors including the type of material forming the photochromic indicator 602, the photochromic pigment(s) used, the components associated with the photochromic indicator 602, or other factors or combinations of factors.

[0069] In some examples of method 400, at operation 410, at least one of the photochromic indicator 602 or the component associated therewith can be removed and processed or refurbished (410-Remove and Recycle / Refurbish or Process Photochromic Indicator). Subsequently, at operation 412, another photochromic indicator can be associated with the component, or associated with the replaced or refurbished component (412-Associate a Second Photochromic Indicator in a First State with the Component), and method 400 can return to operation 404 so that a new plurality of cleaning iterations can be performed.

[0070] In various aspects of the present disclosure, methods 300 and 400 can be performed by an employee, such as an airline employee, and the cleaning results can be verified by the employee as well as the passenger. In other aspects, methods 300 and 400 can be performed by a passenger or customer and visually confirmed. In other aspects of the present disclosure, methods 300 and 400 can be automatically performed in response to a command transmitted to the system 100 according to a predetermined schedule or in response to a triggering event such as deplaning or a gear change. In some aspects of the present disclosure, more than one graphic can be included in the photochromic indicator, such that a first graphic changes from a first state to a second state in response to a first combination of time and UV wavelength, and a second graphic changes from a first state to a second state in response to a second combination of time and UV wavelength.

[0071] In this disclosure, reference is made to various aspects. However, it should be understood that this disclosure is not limited to the specifically described aspects. On the contrary, any combination of the above-mentioned features and elements, whether or not related to different aspects, is intended to be used to implement and practice the teachings provided herein. In addition, when describing the elements of various aspects in the form of "at least one of A and B", it will be understood that it is envisaged to exclusively include element A, exclusively include element B, and include elements A and B. In addition, although some aspects can achieve advantages over other possible solutions and / or advantages over the prior art, whether a particular advantage is achieved by a given aspect is not a limitation of this disclosure. Therefore, the aspects, features, aspects and advantages disclosed herein are merely illustrative and are not considered to be elements or limitations of the appended claims unless expressly stated in the claims. Similarly, reference to "the present invention" should not be interpreted as a summary of any inventive subject matter disclosed herein and should not be considered to be elements or limitations of the appended claims unless expressly stated in the claims.

[0072] As will be appreciated by those skilled in the art, the aspects described herein may be embodied as systems, methods, or computer program products. Thus, the aspects may take the form of entirely hardware aspects, entirely software aspects (including firmware, resident software, microcode, etc.), or combined software and hardware aspects, which may all be collectively referred to herein as "circuits," "modules," or "systems." Furthermore, the aspects described herein may take the form of a computer program product implemented in one or more computer-readable storage media having computer-readable program code implemented thereon.

[0073] Program code embodied on a computer readable storage medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0074] The computer program code for performing the operations of various aspects of the present disclosure can be written in any combination of one or more programming languages, including object-oriented programming languages such as Java, Smalltalk, C++, and conventional procedural programming languages such as the "C" programming language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a stand-alone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or a connection to an external computer (e.g., via the Internet using an Internet service provider).

[0075] Aspects of the present disclosure are described herein with reference to the flowcharts and / or block diagrams of the methods, devices (systems) and computer program products according to aspects of the present disclosure. It will be understood that each box of the flowchart and / or block diagram and the combination of boxes in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer or other programmable data processing device to produce a machine so that the instructions executed by the processor of the computer or other programmable data processing device create a device for implementing the function / action specified in (one or more) boxes of the flowchart and / or block diagram.

[0076] These computer program instructions may also be stored in a computer-readable medium that can direct a computer, other programmable data processing device, or other apparatus to operate in a specific manner so that the instructions stored in the computer-readable medium produce an article of manufacture including instructions for implementing the functions / actions specified in (one or more) blocks of the flowchart and / or block diagram.

[0077] Computer program instructions may also be loaded onto a computer, other programmable data processing device, or other apparatus to cause a series of operational steps to be performed on the computer, other programmable device, or other apparatus to produce a computer-implemented process, so that the instructions executed on the computer, other programmable data processing device, or other apparatus provide a process for implementing the functions / actions specified in (one or more) blocks of the flowchart and / or block diagram.

[0078] The flow charts and block diagrams in the accompanying drawings illustrate the architecture, functions and operations of possible implementations of the systems, methods and computer program products according to various aspects of the present disclosure. In this regard, each box in the flow chart or block diagram can represent a module, segment or portion of one or more executable instructions for implementing the specified (one or more) logical functions of the code. It should also be noted that in some alternative implementations, the functions marked in the box may not occur in the order marked in the figure. For example, the two boxes shown in succession can actually be performed substantially simultaneously, or these boxes can sometimes be performed in reverse order or out of order, depending on the functions involved. It will also be noted that each box in the block diagram and / or flow chart and the combination of the boxes in the block diagram and / or flow chart can be implemented by a special hardware-based system or a combination of special hardware and computer instructions that performs a specified function or action.

[0079] Furthermore, the present disclosure includes implementations according to the following clauses:

[0080] 1. A system, comprising:

[0081] Ultraviolet (UV) light source 102;

[0082] a power supply 104 configured to provide power to the UV light source 102; and

[0083] A photochromic indicator 110A is associated with the component 110, the photochromic indicator 110A being in a first state, the UV light source 102 being configured to change the photochromic indicator 110A from the first state to a second state indicating that the component 110 has been cleaned, wherein the second state is visible to the naked eye under ambient lighting.

[0084] 2. The system of clause 1, wherein the component 110 is formed of a material selected from the group consisting of: polymers, polycarbonates, metals, composites, nano-reinforced materials, organic materials, textile fabrics, and combinations thereof.

[0085] 3. The system of clause 1 or 2, wherein the photochromic indicator 110A is in a form selected from the group consisting of: an adhesive, a thread, a woven fabric, an organic material, a polycarbonate element, a polymer element, a metal element, a coating, and combinations thereof.

[0086] 4. The system of any of clauses 1 to 3, wherein the photochromic indicator 110A is included in a tray cover, a headrest cover, a seat cover, an armrest cover, an outlet cover, or a headphone cover.

[0087] 5. The system of any of clauses 1 to 4, wherein the photochromic indicator 110A comprises a reversible photochromic pigment.

[0088] 6. The system of any of clauses 1 to 4, wherein the photochromic indicator 110A comprises an irreversible photochromic pigment.

[0089] 7. The system of any of clauses 1 to 6, wherein the UV light source 102 comprises a wireless device, a wired device, a device removably coupled to a wall of an aircraft cabin, a device removably coupled to a ceiling of an aircraft cabin, a device removably coupled to a seat of an aircraft cabin, or a device removably coupled to a floor of an aircraft cabin.

[0090] 8. The system of any of clauses 1 to 7, wherein the photochromic indicator 110A is invisible to the naked eye when in the first state.

[0091] 9. The system of any of clauses 1 to 8, wherein the UV light source 102 is configured to emit a wavelength from about 222 nanometers (nm) to about 254 nm.

[0092] 10. The system of any of clauses 1 to 9, wherein the photochromic indicator 110A is included in a cover comprising at least one hole, wherein the cover is configured to be coupled to the component by one or more of an adhesive, a magnetic mechanism, a hook and loop mechanism, a mechanical mechanism, or a combination thereof.

[0093] 11. The system of clause 10, wherein the component 110 comprises a gaming system.

[0094] 12. A cleaning method, comprising:

[0095] removably coupling a first photochromic indicator to component 302, the first photochromic indicator being in a first state;

[0096] applying an ultraviolet (UV) light source to the component 304, wherein, in response to the UV light source, the first photochromic indicator changes from the first state to a second state 306, the second state indicating that the component has been cleaned, wherein the second state is visible to the naked eye under ambient light;

[0097] disengaging 308 the first photochromic indicator from the component;

[0098] processing the first photochromic indicator 310; and

[0099] A second photochromic indicator is removably coupled to the component 312 , the photochromic indicator being in the first state.

[0100] 13. The method of clause 12, wherein the photochromic indicator is included in a single-use component that is removably coupled to the component by an adhesive, a magnetic mechanism, a hook and loop mechanism, a mechanical mechanism, or a combination thereof.

[0101] 14. The method of clause 12 or 13, wherein the photochromic indicator comprises two or more photochromic pigments, each of the two or more photochromic pigments having at least one of a different concentration or a different composition.

[0102] 15. A cleaning method, comprising:

[0103] (a) applying an ultraviolet (UV) light source to the component 404 having the first photochromic indicator in a first state,

[0104] wherein, in response to the UV light source being applied to the first photochromic indicator and the first photochromic indicator absorbing energy from the UV light source, the first photochromic indicator changes from the first state to a second state 406 indicating that the component has been cleaned; and

[0105] After a predetermined period of time, in response to dissipation of energy from the UV light source absorbed by the first photochromic indicator, the first photochromic indicator changes from the second state to the first state 408 .

[0106] 16. The method of clause 15, further comprising: removably coupling the first photochromic indicator to the component 402 before applying the UV light source, the first photochromic indicator comprising an irreversible photochromic pigment.

[0107] 17. The method of clause 15 or 16, further comprising: (b) reapplying the UV light source to the first photochromic indicator after the first photochromic indicator changes from the second state to the first state 404, wherein, in response to (b) the first photochromic indicator changing from the first state back to the second state 406, it indicates that the component has been cleaned.

[0108] 18. The method of clause 17, further comprising repeating (a) and (b) a plurality of times, wherein the first photochromic indicator comprises at least one reversible pigment.

[0109] 19. The method of clause 18, further comprising, after performing (a) and (b) a plurality of times:

[0110] Disengaging 410 the first photochromic indicator from the component;

[0111] processing the first photochromic indicator 410; and

[0112] A second photochromic indicator is associated with the component, the second photochromic indicator being in the first state 412 .

[0113] 20. The method of any of clauses 15 to 19, wherein the first photochromic indicator comprises a brand identifier.

[0114] 21. An assembly comprising:

[0115] A photochromic indicator 110A is associated with a component 110, the photochromic indicator 110A being in a first state under ambient light and being configured to be in a second state under the ambient light after being exposed to a UV light source 102, wherein the first state is different from the second state, the photochromic indicator 110A being configured to change from the first state to the second state in response to the UV light source 102 to indicate that the component 110 has been cleaned.

[0116] 22. The assembly of clause 21, wherein the UV light source 102 is configured to emit a wavelength from about 222 nm to about 254 nm.

[0117] 23. The assembly of clause 21 or 22, wherein the photochromic indicator 110A is configured as a disposable, single-use element.

[0118] 24. The assembly of any of clauses 21 to 24, wherein the component 110 is formed from a material selected from the group consisting of: polymers, polycarbonates, metals, composites, nano-reinforced materials, organic materials, textile fabrics, and combinations thereof.

[0119] 25. The assembly of any of clauses 21 to 24, wherein the photochromic indicator 110A is associated with the component 110 via a mechanism selected from the group consisting of: an adhesive mechanism, a mechanical mechanism, a magnetic mechanism, a hook and loop mechanism, and combinations thereof.

[0120] 26. A photochromic indicator 110A, comprising:

[0121] A photochromic pigment that is in a first state under ambient light and is configured to be in a second state under ambient light after exposure to a UV light source 102, wherein the first state is different from the second state, the photochromic pigment being configured to change from the first state to the second state in response to the UV light source 102.

[0122] 27. The photochromic indicator of clause 26, wherein the photochromic pigment is configured to change from the first state to the second state in response to the UV light source 102 emitting a wavelength from about 222 nm to about 254 nm.

[0123] 28. The photochromic indicator of clause 26 or 27, wherein the photochromic pigment comprises a reversible photochromic pigment.

[0124] 29. The photochromic indicator of clause 26 or 27, wherein the photochromic pigment comprises an irreversible photochromic pigment.

[0125] 30. The photochromic indicator of any of clauses 26 to 29, wherein the photochromic indicator 110A is in a form selected from the group consisting of: an adhesive, a thread, a woven fabric, an organic material, a polycarbonate element, a polymer element, a metal element, a coating, and combinations thereof.

[0126] While the foregoing is directed to aspects of the present disclosure, other and further aspects of the disclosure may be devised without departing from the basic scope thereof, and the scope of the disclosure is determined by the claims that follow.

Claims

1. A component, comprising: A photochromic indicator (110A) is associated with a component (110), the photochromic indicator (110A) being in a first state under ambient light and being configured to be in a second state under the ambient light after exposure to a UV light source (102), wherein the first state is different from the second state, the photochromic indicator (110A) being configured to change from the first state to the second state in response to the UV light source (102) to indicate that the component (110) has been cleaned, The photochromic indicator (110A) includes a plurality of apertures (204, 206, 208, 210, 212, 214) of various geometric shapes configured to allow access to control or selection features of a corresponding component (110) associated with the photochromic indicator (110A).

2. The assembly according to claim 1, wherein The plurality of holes (204, 206, 208, 210, 212, 214) of various geometric shapes include circular holes (204), polygonal holes (208), triangular holes (210), horizontal slots (212), or vertical slots (214).

3. The assembly according to claim 1 or 2, wherein The component (110) is formed of a material selected from the group consisting of polymers, polycarbonates, metals, composites, nano-reinforced materials, organic materials, textile fabrics, and combinations thereof.

4. The assembly according to claim 1 or 2, wherein The photochromic indicator (110A) is in a form selected from the group consisting of: an adhesive, a thread, a woven fabric, an organic material, a polycarbonate element, a polymer element, a metal element, a coating, and combinations thereof.

5. The assembly according to claim 1 or 2, wherein The photochromic indicator (110A) is included in a tray cover, a headrest cover, a seat cover, an armrest cover, an outlet cover, or a headphone cover.

6. The assembly according to claim 1 or 2, wherein The photochromic indicator (110A) includes a reversible or irreversible photochromic pigment.

7. The assembly according to claim 1 or 2, wherein: The photochromic indicator (110A) is invisible to the naked eye when in the first state.

8. The assembly according to claim 1 or 2, wherein: The photochromic indicator (110A) is included in a cover including at least one aperture, wherein the cover is configured to couple to the component via one or more of an adhesive, a magnetic mechanism, a hook and loop mechanism, a mechanical mechanism, or a combination thereof.

9. The assembly according to claim 8, wherein The component (110) includes a gaming system.

10. A system comprising: Ultraviolet light source, i.e., UV light source (102); a power supply (104) configured to provide power to the UV light source (102); as well as An assembly according to claim 1 comprising the photochromic indicator (110A) associated with a component (110).

11. The system according to claim 10, wherein: The UV light source (102) includes a wireless device, a wired device, a device removably coupled to a wall of an aircraft cabin, a device removably coupled to a ceiling of an aircraft cabin, a device removably coupled to a seat of an aircraft cabin, or a device removably coupled to a floor of an aircraft cabin.

12. The system according to claim 10 or 11, wherein: The UV light source (102) is configured to emit wavelengths from about 222 nm to about 254 nm.

13. A cleaning method, comprising: removably coupling a first photochromic indicator to a component (302), the first photochromic indicator being in a first state; applying an ultraviolet light source (UV light source) to the component (304), wherein, in response to the UV light source, the first photochromic indicator changes from the first state to a second state (306), the second state indicating that the component has been cleaned, wherein the second state is visible to the naked eye under ambient light; disengaging the first photochromic indicator from the component (308); disposing of the first photochromic indicator (310); and removably coupling a second photochromic indicator to the component (312), the photochromic indicator being in the first state, Each of the first and second photochromic indicators includes a plurality of apertures (204, 206, 208, 210, 212, 214) of various geometries configured to allow access to control or selection features of a corresponding component to which the photochromic indicator is removably coupled.

14. A cleaning method, comprising: (a) applying an ultraviolet light source, namely a UV light source, to a component (404) associated with a first photochromic indicator in a first state, wherein, in response to the UV light source being applied to the first photochromic indicator and the first photochromic indicator absorbing energy from the UV light source, the first photochromic indicator changes from the first state to a second state (406), the second state indicating that the component has been cleaned; and After a predetermined period of time, in response to dissipation of energy from the UV light source absorbed by the first photochromic indicator, the first photochromic indicator changes from the second state to the first state (408), The first photochromic indicator includes a plurality of apertures (204, 206, 208, 210, 212, 214) of various geometric shapes configured to allow access to control or selection features of respective components associated with the first photochromic indicator.

15. The method according to claim 14, further comprising: (b) reapplying the UV light source to the first photochromic indicator after the first photochromic indicator changes from the second state to the first state (404), wherein, in response to (b), the first photochromic indicator changes from the first state back to the second state (406), indicating that the component has been cleaned.

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