UV cleaning systems and methods

Abstract

To provide systems and methods for reliably cleaning a surface and confirming that cleaning procedures have been executed, in contrast to current surface cleaning methods that cannot provide reliable indications that the cleaning has been performed.SOLUTION: The present disclosure provides a system including an ultraviolet (UV) light source, a power source configured to provide power to the UV light source, and a photochromatic indicator associated with a component, the photochromatic indicator being in a first state, the UV light source being configured to change the photochromatic 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 a naked eye under ambient lighting.SELECTED DRAWING: Figure 1

Description

[Background technology]

[0001] Current methods for cleaning surfaces may not reliably indicate that a cleaning process has been performed. Thus, users of these surfaces and users involved in performing the cleaning process may not be able to be sure that the surfaces have been adequately cleaned. Therefore, there is a need for systems and methods for reliably cleaning and verifying that a cleaning procedure has been performed. Summary of the Invention [Means for solving the problem]

[0002] The present disclosure provides, in one aspect, a system comprising: an ultraviolet (UV) light source; a power source that powers the UV light source; and a photochromatic indicator associated with a component, the photochromatic indicator being in a first state and the UV light source being configured to change the photochromatic 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 light.

[0003] In one aspect, in combination with any exemplary system above or below, the system includes wherein the component is formed from 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 material, and combinations thereof.

[0004] In one aspect, in combination with any exemplary system above or below, the system includes the photochromatic 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.

[0005] In one aspect, in combination with any of the exemplary systems described above or below, the system includes the photochromatic indicator being included in a tray cover, a headrest cover, a seat cover, an armrest cover, a power outlet cover, or a headset cover.

[0006] In one aspect, in combination with any exemplary system above or below, the system includes wherein the photochromatic indicator includes a reversible photochromatic pigment.

[0007] In one aspect, in combination with any exemplary system above or below, the system includes wherein the photochromatic indicator includes an irreversible photochromatic pigment.

[0008] In one aspect, in combination with any exemplary system above or below, the system includes where the UV light source includes a wireless device, a wired device, a device removably coupled to a wall of the aircraft cabin, a device removably coupled to a ceiling of the aircraft cabin, a device removably coupled to a seat in the aircraft cabin, or a device removably coupled to a floor of the aircraft cabin.

[0009] In one embodiment, in combination with any exemplary system described above or below, the system includes that the photochromatic indicator is invisible to the naked eye when in the first state.

[0010] In one embodiment, in combination with any exemplary system described above or below, the system includes a UV light source emitting wavelengths of about 222 to about 254 nanometers (nm).

[0011] In one aspect, in combination with any exemplary system described above or below, the system includes the photochromatic indicator being included in a cover with at least one opening, the cover being configured to couple to the component via one or more of adhesive, magnetic means, mechanical means, hook and loop means, or combinations thereof.

[0012] In one aspect, in combination with any example system above or below, the system includes wherein the component includes a gaming system.

[0013] The present disclosure provides, in one aspect, a method, the method including the steps of: removably coupling a first photochromatic indicator to a component, wherein the first photochromatic indicator is in a first state; irradiating the component with an ultraviolet (UV) light source, wherein in response to the UV light source the first photochromatic indicator changes from the first state to a second state, the second state indicating that the component has been cleaned, wherein the second state is visible to the naked eye under ambient light; detaching the first photochromatic indicator from the component; discarding the first photochromatic indicator; and removably coupling a second photochromatic indicator to the component, wherein the photochromatic indicator is in the first state.

[0014] In one aspect, in combination with any exemplary method above or below, the method includes the photochromatic indicator being included in a single-use component that is removably coupled to the component via adhesive, magnetic means, hook-and-loop means, mechanical means, or combinations thereof.

[0015] In one embodiment, in combination with any exemplary method above or below, the method includes the photochromatic indicator comprising two or more photochromatic pigments, each of the two or more photochromatic pigments having at least one of a different concentration or a different composition.

[0016] The present disclosure, in one aspect, provides a method, the method including: (a) irradiating a component having a first photochromatic indicator in a first state with an ultraviolet (UV) light source, wherein the first photochromatic indicator changes from the first state to a second state in response to the UV light source irradiating the first photochromatic indicator and the first photochromatic indicator absorbing energy from the UV light source, the second state indicating that the component is cleaned, and wherein the first photochromatic indicator changes from the second state to the first state in response to dissipation of the energy from the UV light source absorbed by the first photochromatic indicator after a predetermined period of time.

[0017] In one aspect, in combination with any exemplary method above or below, the method includes, prior to the step of irradiating with a UV light source, a step of removably coupling a first photochromatic indicator to the component, wherein the first photochromatic indicator comprises an irreversible photochromatic pigment.

[0018] In one aspect, in combination with any exemplary method above or below, the method includes (b) re-illuminating the first photochromatic indicator with the UV light source following the first photochromatic indicator changing from the second state to the first state, wherein the first photochromatic indicator changes from the first state back to the second state in response to (b), indicating that the component has been cleaned.

[0019] In one aspect, in combination with any exemplary method above or below, the method includes repeatedly performing (a) and (b) multiple times, wherein the first photochromatic indicator includes at least one reversible pigment.

[0020] In one aspect, in combination with any exemplary method described above or below, the method includes, following the step of repeatedly performing (a) and (b) multiple times, the steps of detaching the first photochromatic indicator from the component, discarding the first photochromatic indicator, and associating a second photochromatic indicator with the component, wherein the second photochromatic indicator is in the first state.

[0021] In one embodiment, in combination with any exemplary method above or below, the method includes wherein the first photochromatic indicator includes a brand identifier.

[0022] The present disclosure provides an assembly, the assembly comprising: a photochromatic indicator associated with a component, the photochromatic indicator being configured to be in a first state under ambient light and 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, and the photochromatic 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.

[0023] In one embodiment, in combination with any of the exemplary assemblies described above or below, the UV light source is configured to emit wavelengths from about 222 nm to about 254 nm.

[0024] In one aspect, in combination with any of the exemplary assemblies described above or below, the photochromatic indicator is configured as a disposable, single-use element.

[0025] In one aspect, in combination with any exemplary assembly described above or below, the component is formed from 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.

[0026] In one aspect, in combination with any exemplary assembly described above or below, the photochromatic indicator is associated with the component via a means selected from the group consisting of adhesive means, mechanical means, magnetic means, hook and loop means, and combinations thereof.

[0027] The present disclosure provides a photochromatic indicator, the photochromatic indicator comprising a photochromatic pigment, the photochromatic pigment being in a first state under ambient light and configured to become in a second state under ambient light after exposure to a UV light source, the first state being different from the second state, and the photochromatic pigment being configured to change from the first state to the second state in response to the UV light source.

[0028] The present disclosure provides a photochromatic indicator, including a photochromatic pigment configured to change from a first state to a second state in response to a UV light source that emits a wavelength of from about 222 nm to about 254 nm.

[0029] The present disclosure provides a photochromatic indicator, including that the photochromatic pigment is a reversible photochromatic pigment.

[0030] The present disclosure provides a photochromatic indicator, including where the photochromatic pigment is an irreversible photochromatic pigment.

[0031] The present disclosure provides a photochromatic indicator, wherein the photochromatic indicator is in a form selected from the group consisting of a sticker, a thread, a fabric, an organic material, a polycarbonate element, a polymer element, a metal element, a coating, and combinations thereof.

[0032] So that the above functions can be understood in detail, a more particular description, briefly summarized above, can be had by reference to illustrative embodiments, some of which are illustrated in the accompanying drawings. [Brief explanation of the drawings]

[0033] [Figure 1] 1 illustrates a system configured to clean one or more components according to an embodiment of the present disclosure. [Figure 2] FIG. 1 is a diagram of an exemplary photochromatic indicator according to aspects of the present disclosure. [Figure 3] 1 is a flowchart of a cleaning method using a photochromatic indicator according to an aspect of the present disclosure. [Figure 4] 1 is a flowchart of a cleaning method using a photochromatic indicator according to an aspect of the present disclosure. [Figure 5A] 10A-10C illustrate a photochromatic indicator during various operations of a cleaning method according to aspects of the present disclosure. [Figure 5B] 10A-10C illustrate a photochromatic indicator during various operations of a cleaning method according to aspects of the present disclosure. [Figure 5C] 10A-10C illustrate a photochromatic indicator during various operations of a cleaning method according to aspects of the present disclosure. [Figure 6A] 10A-10C illustrate another photochromatic indicator during various operations of a cleaning method according to aspects of the present disclosure. [Figure 6B] 10A-10C illustrate another photochromatic indicator during various operations of a cleaning method according to aspects of the present disclosure. [Figure 6C] 10A-10C illustrate another photochromatic indicator during various operations of a cleaning method according to aspects of the present disclosure. [Figure 6D] 10A-10C illustrate another photochromatic indicator during various operations of a cleaning method according to aspects of the present disclosure. [Figure 6E] 10A-10C illustrate another photochromatic indicator during various operations of a cleaning method according to aspects of the present disclosure. [Figure 6F]10A-10C illustrate another photochromatic indicator during various operations of a cleaning method according to aspects of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0034] The present disclosure relates to cleaning, e.g., sterilization and disinfection, of one or more surfaces of a component using ultraviolet (UV) light. Cleaning as described herein can, in some examples, include sterilization. As used herein, "sterilization" refers to a process that renders one or more surfaces of a component free of bacteria, viruses, or other living microorganisms. The surfaces described herein are "high-touch" surfaces that are in contact with multiple parties, such as seats, trays, counters, touchscreens, keyboards, or gaming consoles, and are significantly different from "low-touch" surfaces, such as ceilings and other hard-to-reach surfaces. In some examples, such "high-touch" surfaces may be present in aerospace vehicles, such as commercial aircraft. In some examples, UV light may be used alone, while 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 elements such as viruses and bacteria, thereby preventing the cleaned surface from potentially transmitting biological contaminants among and between users of the high-touch surface.

[0035] Currently used cleaning processes may use one or more photoluminescent elements to indicate that rooms and surfaces, such as aircraft lavatories, have been cleaned. However, currently used photoluminescent processes are generally observed in a darkened cabin or other area where all light sources can be turned off or otherwise covered, as the photoluminescent strip emits light from absorbed photons. Furthermore, some currently used systems use photoluminescent indicators that can be charged by multiple light sources, such as ambient light sources, in addition to the cleaning light source, such as UV light. As such, the photoluminescent indicators may glow from being charged by these light sources, thereby undesirably providing a false reading of ultraviolet (UV) exposure and resulting cleaning status.

[0036] High-touch surfaces as described herein can include aircraft components, such as those in the passenger cabin, crew areas, or cockpit, as well as gaming systems. As described herein, a "gaming system" is a system configured for gambling in a casino or for a non-gambling environment, such as an all-ages arcade or home system, including an esports system. It is further contemplated that other high-touch surfaces in high-traffic areas, such as touchscreens and / or keypads, card readers, or other surfaces or combinations of surfaces in retail stores, shopping malls, schools, offices, rental cars, rideshares, homeshares, financial institutions, automated teller machines (at financial institutions or elsewhere), hospitals, hotels / motels / resorts, or other locations, can be cleaned using the systems and methods described herein, both for high-touch surfaces and other areas. These high-touch surfaces may further include door handles, desktops, countertops, keyboards, computer mice, touchscreens / GUIs on ticket machines and mobile devices, other areas of the mobile device and / or mobile device case, clothes hangers, seats, cutlery, tableware, glassware, or other items containing surfaces that may be touched by multiple parties during use.

[0037] Using the systems and methods described herein, photochromatic indicators are used to indicate to those responsible for cleaning the component and to those who may use the component when a component containing one or more high-touch surfaces has been cleaned. Thus, the systems and methods described herein establish confidence, and in some instances, confirmation and auditability, that cleaning has occurred. Cleaning may be defined by a predetermined schedule set by the party that owns or rents the component, or by local, state, or federal regulations.

[0038] As used herein, a "photochromatic indicator" is a single-use, multi-use, semi-permanent, or permanent element containing one or more photochromatic pigments. The photochromatic pigment is configured to change from a first state to a second state over a predetermined period of time in response to the absorption of UV light. For example, the photochromatic pigment can change from clear to colored upon absorbing specific UV light. The photochromatic pigment can be in the form of a liquid, solid (e.g., powder), colloid (e.g., slurry), or other form or combination of forms. Depending on the example, the photochromatic pigment can be used in the indicator as a liquid or gel reservoir, paint or other coating, incorporated into a sticker, or added to a polymer, polycarbonate, metal, or fiber element. As used herein, the terms "paint" and "coating" can be used interchangeably to refer to various types of materials (such as photochromatic indicators) applied in one or more layers to one or more surfaces of a component that can be removed and replaced by chemical, mechanical, or combination means.

[0039] The first and second states of the photochromatic indicators described herein can be seen with the naked eye in ambient light, thereby eliminating the need to darken the area containing the photochromatic indicator to confirm cleaning. As used herein, "ambient light" refers to light present in a room due to natural light (e.g., the sun) or existing room lighting, as opposed to light used to illuminate specific aspects or areas of a room or other environment. As used herein, "visible to the naked eye" refers to something that can be seen without magnification, including when a person is wearing prescription eyeglasses. 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 wishing to verify the change is visually impaired or wishes to create a record of the change using a mobile device. The ability to verify that a surface has been cleaned using the photochromatic indicators described herein provides assurance to both the person cleaning the surface and the person using the surface.

[0040] Depending on the example, the photochromatic pigment contained in the photochromatic indicator can be selected and configured to be reversible or irreversible. When used herein in reference to a photochromatic indicator containing a photochromatic pigment, e.g., a polymeric, polycarbonate, metal, or fiber element, or a coating on an element, containing the photochromatic pigment therein, "reversible" means that UV light is applied to the photochromatic indicator to cause the photochromatic indicator to change from a first state to a second state. In this example, after a predetermined period of time, which may range from about 10 minutes to about 24 hours, the photochromatic indicator changes from the second state back to the first state. In other examples, the predetermined period of time may be from about 30 minutes to about 3 hours. In yet other examples, the predetermined period of time in the first state may be from about 2 hours to about 6 hours. As used herein, "about" means within + / - 5% of a stated target, maximum, or minimum value.

[0041] In one example, the first state of the photochromatic indicator can include text and / or graphics in a first color that are visible to the naked eye. In another example that can be combined with other examples herein, the first state of the photochromatic indicator may not be visible to the naked eye. In some examples, the first state can alternatively or additionally include a tactile element, such that the photochromatic 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 can include a second, different color that is visible to the naked eye. The second state can include graphics and / or text that indicate that the associated component or surface has been cleaned. In one example that can be combined with other examples herein, the second state can further include brand identification information (logo) such that the brand identification information is visible in the second state but not in the first state. In some examples, the first state of the photochromatic indicator can be a first color, and the second state can be a different color such that the photochromatic indicator is visible in both states. In other examples, a first state of a photochromatic indicator can include branding of a first color, and a second state can include branding of a different color, as well as additional graphics and / or text that were not visible in the first state. The additional graphics and / or text can indicate that a component associated with the photochromatic indicator has been cleaned. As described herein, a photochromatic indicator can be "associated" with a component by being removably coupled, permanently coupled, or integrally formed with the component, as described below in FIG. 1.

[0042] In some instances, photochromatic indicators may be associated with multi-purpose or semi-permanent components, such as tray table inserts or armrests in aircraft cabins or cockpits. These indicators may be referred to as "multi-purpose" photochromatic indicators because they change from a first state to a second state in response to the absorption of UV light, then return to the first state when the absorbed UV energy dissipates, and then can be re-irradiated with UV light to change the photochromatic indicator from the first state back to the second state. After a predetermined number of re-cleanings, the multi-purpose photochromatic indicator can be removed, discarded, refurbished, recycled, or replaced with a new, previously unused photochromatic indicator. Similarly, semi-permanent photochromatic indicators may be changed from a first state to a second state multiple times before eventually being replaced during the refurbishment of the associated component. For example, in aircraft, seats may be replaced or refurbished according to a maintenance schedule, and photochromatic indicators may be incorporated into the fabric or other materials comprising the seats and refurbished as part of the maintenance process. Examples of permanent components where photochromatic indicators may be used are those that are typically replaced in their entirety and are not repainted / recoated, repolished, or otherwise refurbished due to damage, prescribed maintenance procedures, design changes, mergers and acquisitions (which may result in a rebranding), or other policies or regulations. Photochromatic pigments or elements containing photochromatic pigments (e.g., photochromatic indicators) should be selected to be stable under the various environmental conditions on an aircraft in flight.

[0043] Furthermore, when used herein in reference to a photochromatic pigment or an element containing a photochromatic pigment, for example, a polymeric, polycarbonate, metal, or fiber element containing the photochromatic pigment therein, "irreversible" means that the photochromatic indicator is irradiated with UV light, causing the photochromatic indicator to change from a first state to a second state, and does not change back to the first state within the useful life of the photochromatic indicator. That is, the photochromatic indicator containing the irreversible pigment is removed / refurbished or discarded before it changes back to the first state. In some examples, the pigment or the irreversible photochromatic indicator containing the pigment can be included in an element that is a single-use, disposable component. These single-use, disposable components can include headrest covers, tray table covers, table covers (e.g., in restaurants or food courts), seat covers, restroom component covers, or other components suitable for various applications. The second condition may also reflect branding and / or messaging indicating a UV treated condition and / or branding and / or messaging indicating that the photochromatic indicator and its associated component are single use (e.g., a headrest or tray table cover for a passenger or pilot's seat on an aircraft, bus, or train).

[0044] FIG. 1 illustrates a system 100 configured to clean one or more components according to an example of the present disclosure. The system 100 can include a UV light source 102 and a power source 104. The UV light source 102 can be configured as a standalone wireless device including the power source 104, which may be a rechargeable battery. As described in detail below, the UV light source 102 can be configured to emit wavelengths from about 100 nanometers (nm) to about 400 nm. In some examples, the UV light source can be configured to emit wavelengths from about 222 nm to about 254 nm. In some examples, the UV light source 102 can have an elongated shape, referred to as a "wand," a circular shape, a polygonal shape, or a combination of two or more shapes. The UV light described herein can be UVA, UVB, UVC, or a combination of UV light types. The UV light source 102 can include multiple LED lights. In other examples, the UV light source 102 can be configured as a wired device that may or may not be connected to the power source 104 during use. In yet another example, the UV light source 102 can be configured as a self-propelled or manually operated 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 another example, 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.

[0045] The UV light source 102 can be configured to clean a component 110 having one or more surfaces. As described above, the component 110 can be located in an aircraft, car, train, bus, office, restaurant, retail store, residence, hotel / resort, hospital, or other location. A photochromatic indicator 110A can be associated with the component 110 to form an assembly. A "removably coupled" photochromatic indicator 110A can be coupled to and detached from the component 110 without damaging the component 110. For example, the photochromatic indicator 110A can be a cover, sticker, paint / coating, or other form. A removably coupled photochromatic indicator 110A can also be a semi-permanent photochromatic indicator 110A that can be used for multiple cleaning cycles as described herein, whereby the semi-permanent photochromatic indicator changes from a first state to a second state and back to the first state a predetermined number of times before being replaced with a new photochromatic indicator. A "permanently bonded" photochromatic indicator 110A is formed separately from the component 110 and then bonded to the component 110, allowing for multiple uses but not being removable from the component 110 without damaging the component 110. This may be, for example, one or more threads in the form of a covering (e.g., fabric) that is associated with the seat or headrest after the seat or headrest is manufactured. An "integral" photochromatic indicator 110A may be molded, cast, or otherwise incorporated into the component 110. Depending on the type of component 110 and the type of maintenance performed on the component 110, the integrated photochromatic indicator 110A may be removed and replaced or refurbished / recycled. Thus, the photochromatic indicator 110A may be a sticker, thread, fabric, organic material (e.g., wood or plant-based material such as paper), polycarbonate element, polymer element, metal element, coating, and their respective components. It may be in the form of a combination.

[0046] The UV light source 102 can be configured to operate at a wavelength or within a range such that one or more photochromatic pigments included in the photochromatic 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 photochromatic pigments included in the photochromatic indicator 110A can be reversible or irreversible, as described above. In some examples, the photochromatic indicator 110A can be configured to include two or more types (colors) of photochromatic pigments, or two or more concentrations of the same type (color), such that the photochromatic indicator 110A has a color gradient formed over time in one or more directions. In one example, the color gradient can be configured to indicate to a purifier or purification system sensor when the photochromatic indicator 110A is changing from a first state to a second state. In another example, which can be combined with other examples herein, when the photochromatic indicator 110A changes from the second state back to the first state, a color gradient can be configured to be displayed to a purifier or cleaning system sensor, or a user of an associated component 110, as an early warning that re-cleaning the component 110 may be desirable.

[0047] The photochromatic indicator 110A can be formed from one or more materials configured to be used and approved for use in one or more of aircraft, automobiles, hospitals, restaurants, retail stores, hotels / resorts, or other locations described herein. Thus, in some locations, the photochromatic indicator 110A will be formed from one or more materials configured to withstand humidity, fire, a wide pH range, heat, cold, or other conditions without being removed from or uncoupled from its associated components. In some examples, the photochromatic indicator 110A is formed from materials selected to prevent the release of toxic gases in the event of a fire.

[0048] Component 110 may be formed from one or more of a polymer, polycarbonate, metal, composite material, nano-reinforced material, organic material (including plant- or wood-based materials such as paper), textile, and combinations of materials. In various examples, component 110 may include a tray cover, a headrest cover, a seat cover, an armrest cover, a power outlet cover, a headset cover, a cover configured to cover one or more surfaces of a keyboard or computer mouse, a table, a seat, a countertop, a touchscreen or other element of a mobile device or ticket machine, a tray insert, an armrest insert, a seat insert, or a gaming system, including a casino or esports gaming system.

[0049] In some examples, the system 100 includes a server computer 106 having non-transitory memory configured to store logic in the form of cleaning programs, cleaning schedules, and cleaning records. This and other information may be stored in one or more data storage devices 108, which may be part of a cloud computing system. The UV light source 102 and power source 104 may be in communication with and / or controlled by the server computer 106. In some examples, a mobile device 112, such as a phone, tablet, personal data assistant, laptop computer, or wearable smart device, may include an app configured to determine when the photochromatic indicator 110A is in a first state or a second state.

[0050] The system 100 can be used for a wide variety of cleaning methods using different types of photochromatic indicators associated with various types of components, including those described below.

[0051] FIG. 2 is a diagram of an exemplary photochromatic indicator 200 according to an example of the present disclosure. As described above, photochromatic indicators can take on a variety of geometric and material forms and may be single-use, multiple-use, semi-permanent, or permanent. The photochromatic indicator 200 is partially defined by adjacent edges 202. In some examples, the adjacent edges 202 can be reinforced materials including polymers, polycarbonates, metals, or other materials or combinations of materials. The exemplary photochromatic indicator 200 includes multiple openings of various shapes, including a circular opening 204, a polygonal opening 208, a triangular opening 210, a horizontal slot opening 212, and a vertical slot opening 214. The photochromatic indicator 200 further includes multiple openings of various shapes 206, which can be configured as a cluster.

[0052] In one example, the photochromatic 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 photochromatic display points 216 can be positioned at various locations on the photochromatic indicator 200, each containing one or more photochromatic pigments that change from a first state to a second state in response to irradiation with a UV light source, as described above. In another example, the entire surface 218 of the photochromatic indicator 200 contains one or more photochromatic pigments, possibly in a gradient form, such that the entire surface 218 changes from a first state to a second state in response to irradiation with a UV light source. The photochromatic indicator 200 can include branding specific to a casino, esports brand, restaurant, or bar, including arcades, bank, or other institution using the device to indicate that the associated components have been cleaned.

[0053] Each of openings 204, 206, 208, and 210, which can couple photochromatic indicator 200 to a component using adhesive, mechanical means, magnetic means, hook-and-loop means, friction- or press-fit-based means, or a combination thereof, can be configured to allow access to a control or selection function of the associated component. In another example, one or more of horizontal slot opening 212 and vertical slot opening 214 can be configured to accept card-present transactions from various payment methods, including gaming cards. In another example, one or more of openings 204, 206, 208, and 210, or slot openings 212, 214, can be configured to allow RFID or other wireless communication, such as receiving information from a payment instrument (virtual or physical), a gaming card or app, or other payment instrument.

[0054] The photochromatic indicator 200 may be part of a system, such as system 100, and may be configured to include reversible or irreversible pigments or pigment gradients, depending on the example. In some examples, the gradient may include a combination of both irreversible and reversible photochromatic pigments. In some examples, the gradient may include only irreversible or reversible photochromatic pigments. In one example, the photochromatic indicator 200 may be removably coupled to a slot machine or other gambling machine in a casino or other location where gambling is promoted. In another example, the photochromatic indicator 200 may be coupled to gaming equipment in an arcade outside of a casino, such as an e-sports venue. While the photochromatic indicator 200 is shown here in a strip configuration, in other examples, it may be configured to wrap around a handle, steering wheel, joystick, or other control system used in gaming where it is desirable for both the owner and user of the equipment to be able to confirm that the components associated with the photochromatic indicator 200 have been cleaned.

[0055] FIG. 3 shows a flowchart of a cleaning method 300 using a photochromatic indicator according to an example of the present disclosure. FIGS. 5A-5C illustrate the photochromatic indicator at various operations in method 300. In operation 302, a photochromatic indicator in a first state is removably coupled to a component to be cleaned (302—Removably Couple Photochromatic Indicator in First State to Component). FIG. 5A illustrates an example of a first state 504 of a photochromatic indicator 502 in which no brand identifier or other markings are visible. The removably coupled in operation 302 can be achieved using adhesive, mechanical means, magnetic means, hook-and-loop means, friction- or pressure-fit-based means, or a combination of means. In operation 304, a UV light source is irradiated onto the component containing the photochromatic indicator (304—Irradiate UV Light Source). In a specific example, a UV light source, such as a wand having a wavelength of about 275 to about 395 nm, can be used. In another example, a UV light source, such as a wand having a wavelength of about 260 to about 285 nm, can be used. In yet another example, a UV light source such as a wand having a wavelength of about 222 nm to about 254 nm can be used.

[0056] A UV light source may be applied to the component containing the photochromatic indicator for a predetermined period of time and at a predetermined wavelength. In one embodiment, the predetermined period of time may be from about 5 seconds to about 2 minutes. In another embodiment, the predetermined period of time may be from about 10 seconds to about 60 seconds. In yet another embodiment, 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.

[0057] FIG. 5B illustrates irradiating a photochromatic indicator 502 with a UV light source (102). In operation 306, in response to the photochromatic indicator absorbing UV wavelengths from the UV light source 102, the photochromatic indicator changes from a first state (504) to a second state (506, as shown in FIG. 5C) (306—photochromatic indicator changes to second state). The change from the first state to the second state can be visually confirmed with the naked eye, for example, without magnification, a black light, or other visual aid or visual assistance. In the example of FIG. 5C, when the photochromatic indicator 502 is in the second state 506, irradiation with the UV light source 102 causes a graphic 508 to appear on the photochromatic pigment.

[0058] In another example, a mobile device including an app configured to confirm the presence of a graphic or color change, or both, may be used to confirm the change from the first state to the second state. In yet another example, a tactile sensation may be used to confirm the change from the first state to the second state. In this example, the photochromatic indicator includes an irreversible pigment and is intended for single use. The photochromatic indicator may be in the form of a seat cover, armrest cover, headrest cover, tray table cover, power outlet cover, touchscreen or touchscreen cover or case, table cover, retail or restaurant counter cover, or other disposable cover used in travel, retail, food service, financial institutions, or shared workspaces such as conference rooms or other workspaces that may be used by various individuals. The second state indicates that the component has been cleaned and may be used, for example, on airplanes, trains, buses, or gaming / esports experiences. Thus, following use of the associated component, in operation 308, the photochromatic indicator is detached from the component (308—detach photochromatic indicator from component) and discarded in operation 310 (310—discard or refurbish / recycle photochromatic indicator). In some examples, the photochromatic indicator may be refurbished or recycled, depending on the materials of construction, instead of being discarded in operation 310. In operation 312, a new, refurbished, or recycled photochromatic indicator in a first state is removably coupled to the component (312—replace photochromatic indicator with another photochromatic indicator in the first state).

[0059] FIG. 4 is a flowchart of a cleaning method 400 using a photochromatic indicator. FIGS. 6A-6F show the photochromatic indicator at various operations of method 400. In method 400, optional operation 402 involves removably coupling a photochromatic indicator in a first state to a component to be cleaned (402—removably coupling photochromatic indicator in first state to component). The removably coupling in operation 402 can be performed using adhesive, mechanical means, magnetic means, hook-and-loop means, friction- or press-fit-based means, or a combination of means. In some examples, operation 402 is optional because the photochromatic indicator is integrally formed with the component or is a semi-permanent or permanent aspect of the component. FIG. 6A shows an example of a first state 604 of a photochromatic indicator 602 in which no brand identifier or other marking is visible to the naked eye.

[0060] In operation 404, a UV light source is irradiated onto a component including a photochromatic indicator (404-Irradiate UV Light Source). The UV light source may irradiate the component including the photochromatic indicator for a predetermined duration and at a predetermined wavelength. In one embodiment, the predetermined duration may be from about 5 seconds to about 2 minutes. In another embodiment, the predetermined duration may be from about 10 seconds to about 60 seconds. In yet another embodiment, the predetermined duration may be from about 15 seconds to about 45 seconds. The UV wavelength used in operation 404 may be from about 100 nanometers (nm) to about 400 nm. In one example, UVA, having a wavelength of about 315 nm to about 400 nm, is used. In another example, UVB, having a wavelength of about 280 nm to about 314 nm, is used. In yet another example, UVC, having a wavelength of about 100 nm to about 279 nm, is used. In other examples, overlapping ranges of UVA, UVB, and UVC wavelengths may be used in operation 404. In a specific example, a UV light source such as a wand having a wavelength of about 275 to about 395 nm can be used. In another example, a UV light source such as a wand having a wavelength of about 260 to about 285 nm can be used. In yet another example, a UV light source such as a wand having a wavelength of about 222 to about 254 nm can be used.

[0061] FIG. 6B illustrates irradiating a UV light source onto a photochromatic indicator 602. In operation 406, in response to the photochromatic indicator absorbing UV wavelengths from the UV light source 102, the photochromatic indicator changes from a first state (604) to a second state (606, as shown in FIG. 6C) (406—photochromatic indicator changes to second state). The change from the first state to the second state can be visually confirmed with the naked eye, e.g., without magnification. In the example of FIG. 6C, when the photochromatic indicator 602 is in the second state 606, irradiation with the UV light source 102 causes a graphic 608 to appear on the photochromatic pigment. The photochromatic indicator 602 includes a reversible photochromatic pigment. Thus, in operation 408, the photochromatic indicator 602 changes back to the first state 604, as shown in FIG. 6D (408—photochromatic indicator changes back to first state). This change in operation 408 may occur after a predetermined amount of time has elapsed. Additionally, as described above, photochromatic indicator 602 may include one or more graphics of a single pigment or pigment gradient that may indicate that photochromatic indicator 602 is changing back to first state 604 (FIG. 6D).

[0062] In this example, as indicated by the arrow from operation 408 to operation 404, a UV light source (such as UV light source 102 shown in FIGS. 6B and 6E) can be re-illuminated as shown in FIG. 6E to change photochromatic indicator 602 from first state 604 back to the second state (606 in FIG. 6F), thereby redisplaying graphic 608 in response to UV light source illumination with each cycle indicated by the arrow. This cycle of illuminating photochromatic indicator 602 with a UV light source to change it from the first state (604) to the second state (606) can occur multiple times. The multiple times can be a predetermined number of times, ranging from 2 to over 100, depending on factors including the type of material from which photochromatic indicator 602 is formed, the photochromatic pigment used, the component with which photochromatic indicator 602 is associated, or other factors or combinations of factors.

[0063] In some examples of method 400, at least one of photochromatic indicator 602 or the component with which it is associated may be removed and discarded or refurbished in operation 410 (410—remove and recycle / refurbish or discard photochromatic indicator). Thereafter, at operation 412, another photochromatic indicator may be associated with the component or with the replaced or refurbished component (412—associate second photochromatic indicator in first state with component), and method 400 may return to operation 404 for multiple new iterations of cleaning.

[0064] In various embodiments of the present disclosure, methods 300 and 400 may be performed by an employee, such as an airline employee, and the cleaning results may be verified by the employee and the passenger. In other embodiments, methods 300 and 400 may be performed and visually confirmed by a passenger or customer. In still other embodiments of the present disclosure, methods 300 and 400 may be performed automatically in response to a command sent to system 100 on a predetermined schedule or in response to a triggering event, such as deplaning or a shift change. In some embodiments of the present disclosure, two or more graphics may be included in the photochromatic 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 the first state to a second state in response to a second combination of time and UV wavelength.

[0065] In this disclosure, reference is made to various embodiments. However, it should be understood that the disclosure is not limited to the specific described embodiments. Instead, any combination of the above-described features and elements, whether associated with different embodiments or not, is contemplated to implement and practice the teachings provided herein. Furthermore, when elements of an embodiment are described in the form of "at least one of A and B," it will be understood that embodiments including exclusively element A, embodiments including exclusively element B, and embodiments including elements A and B are respectively contemplated. Furthermore, while some embodiments may achieve other possible solutions and / or advantages over the prior art, whether or not a particular advantage is achieved by a given embodiment does not limit the disclosure. Accordingly, the embodiments, features, and advantages disclosed herein are merely exemplary and should not be considered elements or limitations of the appended claims unless expressly recited in the claims. Similarly, references to "the present invention" should not be construed as a generalization of the inventive subject matter disclosed herein, nor should they be considered elements or limitations of the appended claims unless expressly recited in the claims.

[0066] As will be appreciated by one skilled in the art, aspects described herein may be embodied as a system, method, or computer program product. Accordingly, aspects may take the form of entirely hardware aspects, entirely software aspects (including firmware, resident software, microcode, etc.), or aspects combining software and hardware aspects, all of which are generally referred to herein as "circuits," "modules," or "systems." Furthermore, aspects described herein may take the form of a computer program product embodied in one or more computer-readable storage medium(s) having computer-readable program code embodied therein.

[0067] The program code embodied on the computer readable storage medium may be transmitted using any suitable medium, including but not limited to wireless, wired, fiber optic cable, RF, etc., or any suitable combination thereof.

[0068] Computer program code for performing operations for aspects of the present disclosure may be implemented in Java (registered trademark) , Smalltalk (registered trademark)The program code may be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as C++, and traditional procedural programming languages ​​such as the "C" programming language or similar programming languages. The program code may run entirely on the user's computer, partially on the user's computer, as a standalone 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 scenario, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet Service Provider).

[0069] Aspects of the present disclosure are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to aspects of the present disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus to produce a machine such that the instructions, executed by the processor of the computer or other programmable data processing apparatus, create means for performing the functions / acts specified in the blocks of the flowchart illustrations and / or block diagrams.

[0070] These computer program instructions may also be stored on a computer-readable storage medium that can direct a computer, other programmable data processing apparatus, or other device to function in a particular manner, such that the instructions stored on the computer-readable storage medium create an article of manufacture that includes instructions that implement the functions / acts specified in the flowchart diagrams and / or block diagram blocks.

[0071] The computer program instructions can be loaded into a computer, other programmable data processing apparatus, or other device and cause the computer, other programmable data processing apparatus, or other device to perform a series of operational steps to create a computer-implemented process, such that the instructions executing on the computer, other programmable data processing apparatus, or other device provide a process for performing the functions / acts specified in the blocks of the flowchart diagrams and / or block diagrams.

[0072] The flowchart diagrams and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various aspects of the present disclosure. In this regard, each block in the flowchart diagrams or block diagrams may represent a module, segment, or portion of code, including one or more executable instructions for performing specified logical functions. It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may be executed in the reverse order or out of order, depending on the functionality involved. It should also be noted that each block of the block diagrams and / or flowchart diagrams, and combinations of blocks in the block diagrams and / or flowchart diagrams, can be implemented by a dedicated hardware-based system that performs the specified functions or acts, or a combination of dedicated hardware and computer instructions. Additionally, the present disclosure includes embodiments according to the following clauses:

[0073] 1. an ultraviolet (UV) light source (102); a power supply (104) for supplying power to the UV light source (102); a photochromatic indicator (110A) associated with the component (110), the photochromatic indicator (110A) being in a first state and the UV light source (102) being configured to change the photochromatic indicator (110A) from the first state to a second state, the second state indicating that the component (110) has been cleaned, the second state being visible to the naked eye under ambient light; and A system comprising:

[0074] 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, textiles, and combinations thereof.

[0075] 3. The system of clause 1 or 2, wherein the photochromatic indicator (110A) is in a form selected from the group consisting of a sticker, a thread, a fabric, an organic material, a polycarbonate element, a polymer element, a metal element, a coating, and combinations thereof.

[0076] 4. The system of any one of clauses 1 to 3, wherein the photochromatic indicator (110A) is included in a tray cover, a headrest cover, a seat cover, an armrest cover, a power outlet cover, or a headset cover.

[0077] 5. The system of any one of clauses 1 to 4, wherein the photochromatic indicator (110A) comprises a reversible photochromatic pigment.

[0078] 6. The system of any one of clauses 1 to 4, wherein the photochromatic indicator (110A) comprises an irreversible photochromatic pigment.

[0079] 7. The system of any one 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 the aircraft cabin, a device removably coupled to a ceiling of the aircraft cabin, a device removably coupled to a seat in the aircraft cabin, or a device removably coupled to a floor of the aircraft cabin.

[0080] 8. The system of any one of clauses 1 to 7, wherein the photochromatic indicator (110A) is invisible to the naked eye when in the first state.

[0081] 9. The system of any one of clauses 1 to 8, wherein the UV light source (102) is configured to emit wavelengths between about 222 nanometers (nm) and about 254 nm.

[0082] 10. The system of any one of clauses 1 to 9, wherein the photochromatic indicator (110A) is included in a cover having at least one opening, and the cover is configured to couple to the component via one or more of adhesive, magnetic means, hook and loop means, mechanical means, or combinations thereof.

[0083] 11. The system of clause 10, wherein the component (110) comprises a gaming system.

[0084] 12. Removably coupling (302) a first photochromatic indicator to a component, the first photochromatic indicator being in a first state; irradiating (304) the component with an ultraviolet (UV) light source, wherein in response to the UV light source, a first photochromatic indicator changes (306) from a 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; Separating (308) the first photochromatic indicator from the component; Discarding (310) the first photochromatic indicator; Removably coupling (312) a second photochromatic indicator to the component, the photochromatic indicator being in a first state; A cleaning method comprising:

[0085] 13. The method of clause 12, wherein the photochromatic indicator is contained in a single-use component that is removably coupled to the component via adhesive, magnetic means, hook-and-loop means, mechanical means, or a combination thereof.

[0086] 14. The method of clause 12 or 13, wherein the photochromatic indicator comprises two or more photochromatic pigments, each of the two or more photochromatic pigments having at least one of a different concentration or a different composition.

[0087] 15. (a) irradiating a component having a first photochromatic indicator in a first state with an ultraviolet (UV) light source (404); Including, the UV light source is irradiated onto the first photochromatic indicator, and in response to the first photochromatic indicator absorbing energy from the UV light source, the first photochromatic indicator changes (406) from a first state to a second state, the second state indicating that the component has been cleaned; The cleaning method, wherein the first photochromatic indicator changes (408) from the second state to the first state in response to dissipation of energy from the UV light source absorbed by the first photochromatic indicator after a predetermined period of time.

[0088] 16. The method of clause 15, further comprising the step (402) of removably coupling a first photochromatic indicator to the component prior to the step of irradiating with the UV light source, the first photochromatic indicator comprising an irreversible photochromatic pigment.

[0089] 17. The method of clause 15 or 16, further comprising the step (404) of (b) re-irradiating the first photochromatic indicator with the UV light source following the first photochromatic indicator changing from the second state to the first state, wherein the first photochromatic indicator changes (406) from the first state back to the second state in response to (b), indicating that the component has been cleaned.

[0090] 18. The method of clause 17, further comprising the step of repeatedly performing (a) and (b) a plurality of times, wherein the first photochromatic indicator comprises at least one reversible pigment.

[0091] 19. Following the step of repeatedly performing (a) and (b) multiple times, Separating (410) the first photochromatic indicator from the component; Discarding (410) the first photochromatic indicator; a step (412) of associating a second photochromatic indicator with the component, the second photochromatic indicator being in a first state; 19. The method of clause 18, further comprising:

[0092] 20. The method of any one of clauses 15 to 19, wherein the first photochromatic indicator includes a brand identifier.

[0093] 21. A photochromatic indicator (110A) associated with a component (110), the photochromatic indicator (110A) being configured to be in a first state under ambient light and to be in a second state under ambient light after exposure to a UV light source (102), the first state being different from the second state, and the photochromatic 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. An assembly comprising:

[0094] 22. The assembly of clause 21, wherein the UV light source (102) is configured to emit a wavelength of about 222 nm to about 254 nm.

[0095] 23. The assembly according to clause 21 or 22, wherein the photochromatic indicator (110A) is configured as a disposable, single-use element.

[0096] 24. The assembly of any one of clauses 21 to 23, wherein the component (110) is formed of a material selected from the group consisting of polymers, polycarbonates, metals, composites, nano-reinforced materials, organic materials, textiles, and combinations thereof.

[0097] 25. The assembly of any one of clauses 21 to 24, wherein the photochromatic indicator (110A) is associated with the component (110) via a means selected from the group consisting of adhesive means, mechanical means, magnetic means, hook and loop means, and combinations thereof.

[0098] 26. A photochromatic pigment, the photochromatic pigment being configured to be in a first state under ambient light and to be in a second state under ambient light after exposure to a UV light source (102), the first state being different from the second state, and the photochromatic pigment being configured to change from the first state to the second state in response to the UV light source (102). A photochromatic indicator (110A) including:

[0099] 27. The photochromatic indicator of clause 26, wherein the photochromatic pigment is configured to change from a first state to a second state in response to a UV light source (102) that emits a wavelength of from about 222 nm to about 254 nm.

[0100] 28. A photochromatic indicator according to clause 26 or 27, wherein the photochromatic pigment comprises a reversible photochromatic pigment.

[0101] 29. A photochromatic indicator according to clause 26 or 27, wherein the photochromatic pigment comprises an irreversible photochromatic pigment.

[0102] 30. The photochromatic indicator of any one of clauses 26 to 29, wherein the photochromatic indicator (110A) is in a form selected from the group consisting of a sticker, a thread, a fabric, an organic material, a polycarbonate element, a polymer element, a metal element, a coating, and combinations thereof.

[0103] While the foregoing is directed to embodiments of the present disclosure, other and further embodiments of the disclosure may be devised without departing from the basic scope thereof, which scope is determined by the following claims. [Explanation of symbols]

[0104] 100 systems 102 Ultraviolet (UV) light source 104 Power supply 106 server computers 108 Data storage device 110 Components 110A Photochromatic Indicator 112 Mobile Devices 200 Photochromatic Indicator 202 Edge 204 Circular Opening 206 Opening 208 Polygon opening 210 Triangular opening 212 horizontal slot opening 214 Vertical Slot Opening 216 Photochromatic Display Points 218 Surface 300 ways 400 ways 502 Photochromatic Indicator 504 First State 506 Second State 508 Graphics 602 Photochromatic Indicator 604 First State 606 Second State 608 Graphics

Claims

1. a photochromatic indicator (110A) associated with a component (110), the photochromatic indicator (110A) being configured to be in a first state under ambient light and to be in a second state under the ambient light after exposure to a UV light source (102), the first state being different from the second state, the photochromatic 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; Equipped with An assembly wherein the photochromatic indicator (110A) includes a plurality of openings (204, 206, 208, 210, 212, 214) of different geometric configurations, the openings configured to allow access to a control or selection function of the corresponding component (110) associated with the photochromatic indicator (110A).

2. 2. The assembly of claim 1, wherein the plurality of openings (204, 206, 208, 210, 212, 214) of different geometric configurations comprise a circular opening (204), a polygonal opening (208), a triangular opening (210), a horizontal slot opening (212), or a vertical slot opening (214).

3. 3. The assembly of 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, textiles, and combinations thereof.

4. 4. The assembly of claim 1, wherein the photochromatic indicator (110A) is in a form selected from the group consisting of a sticker, a thread, a fabric, an organic material, a polycarbonate element, a polymer element, a metal element, a coating, and combinations thereof.

5. 5. The assembly of claim 1, wherein the photochromatic indicator (110A) is included in a tray cover, a headrest cover, a seat cover, an armrest cover, a power outlet cover, or a headset cover.

6. 6. The assembly of claim 1, wherein the photochromatic indicator (110A) comprises a reversible or irreversible photochromatic pigment.

7. 7. The assembly of claim 1, wherein the photochromatic indicator (110A) is invisible to the naked eye when in the first state.

8. 8. The assembly of claim 1, wherein the photochromatic indicator (110A) is included in a cover having at least one opening, the cover configured to couple to the component (110) via one or more of adhesive, magnetic means, hook and loop means, mechanical means, or combinations thereof.

9. The assembly of claim 8, wherein the component (110) comprises a gaming system.

10. A UV (ultraviolet) light source (102); a power supply (104) for supplying power to the UV light source (102); An assembly comprising a photochromatic indicator (110A) associated with a component (110), the assembly according to claim 1; A system comprising:

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

12. The system of claim 10 or 11, wherein the UV light source (102) is configured to emit wavelengths between about 222 nanometers (nm) and about 254 nm.

13. Removably coupling (302) a first photochromatic indicator to a component, the first photochromatic indicator being in a first state; irradiating the component with a UV (ultraviolet) light source (304), wherein in response to the UV light source, the first photochromatic indicator changes from the first state to a second state (306), the second state indicating that the component has been cleaned, the second state being visible to the naked eye under ambient light; Separating (308) the first photochromatic indicator from the component; Discarding (310) the first photochromatic indicator; removably coupling (312) a second photochromatic indicator to the component, the photochromatic indicator being in the first state; Including, wherein each of the first and second photochromatic indicators includes a plurality of openings (204, 206, 208, 210, 212, 214) having different geometric configurations, the openings configured to allow access to a control or selection function of the corresponding component to which the photochromatic indicator is removably coupled.

14. (a) illuminating a component associated with a first photochromatic indicator in a first state with a UV (ultraviolet) light source (404); Including, the first photochromatic indicator changes (406) from the first state to a second state in response to the UV light source illuminating the first photochromatic indicator and the first photochromatic indicator absorbing energy from the UV light source, the second state indicating that the component has been cleaned; the first photochromatic indicator changing from the second state to the first state (408) in response to dissipation of the energy absorbed by the first photochromatic indicator from the UV light source after a predetermined period of time; The cleaning method, wherein the first photochromatic indicator includes a plurality of openings (204, 206, 208, 210, 212, 214) having different geometric configurations, the openings configured to allow access to control or selection functions of the corresponding component associated with the first photochromatic indicator.

15. 15. The method of claim 14, further comprising: (b) re-illuminating (404) the first photochromatic indicator with the UV light source following the first photochromatic indicator changing from the second state to the first state, wherein the first photochromatic indicator changes (406) from the first state back to the second state in response to (b), indicating that the component has been cleaned.

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