Patent Description:
Controllers for use in ablutionary settings include, for example, digital shower controllers. A digital shower controller typically comprises a manually operated mechanical input portion used to actuate an electronic switch. The electronic switch forms part of a control circuit which is typically used to control one or more characteristics of water delivered by a shower. For instance, the electronic switch may form part of a control circuit used to control actuation of an electronic valve, e.g. a solenoid valve. The electronic valve in turn may control the supply of water to a showerhead in response to actuation of the electronic switch. Parts of the mechanical input portion may wear over time, and the mechanical input portion may become difficult to use due to the build-up of debris between moving parts. The number of different inputs provided by the mechanical input portion is also fixed and the inputs cannot be easily modified.

It is known to provide a digital shower controller with an electronic display for indicating to a user various functions being performed by the controller. For example, the display may indicate a target water temperature which the controller will deliver through control of the electronic valve. Such displays typically reflect light when inactive, meaning that dirt located on the surface of the display is visible. In addition, the edges of the display may be visible relative to the surrounding housing of the controller. These effects result in an undesirable appearance. <CIT> discloses a shower control system including a controller in communication with a plurality of output devices located within a shower enclosure. The controller is configured to control the plurality of output devices. The shower control system further includes a control panel in communication with the controller and configured to provide a graphical user interface for controlling the plurality of output devices. The control panel includes an electronic display configured to present dynamic content, one or more static buttons, and a touch-sensitive panel overlaying both the electronic display and the one or more static buttons. The touch-sensitive panel is configured to detect a user interaction with both the one or more static buttons and the dynamic content presented via the electronic display. Output from the output devices is dependent on the respective device being selected as well as being activated by the user. <CIT> discloses a control panel and a washing machine, capable of providing an aesthetic external appearance and preventing characters or symbols which indicate control functions from being erased and preventing the characters or symbols from being displayed when the operation stops or the control functions are not used. The control panel includes a semi-transparent cover, a film disposed behind the semi-transparent cover and printed with a plurality of characters or symbols, a detecting panel disposed behind the film and having a plurality of detecting members detecting a capacitance of a human body, a circuit board having a light emitting unit irradiating light onto the film to display the characters or the symbols of the film on a rear surface of the semi-transparent cover, and a guide member having a plurality of optical paths guiding light irradiated from the light emitting unit into each of the characters or the symbols of the film. <CIT> discloses a display device with a sheet type half mirror so arranged as to cover a face (a display screen) of a liquid crystal display panel and a backlight arranged on the other side. The half mirror transmits the light emitted from the backlight and reflects the incident light from the outside
<CIT> discloses a liquid crystal display (LCD) and logic for controlling the LCD to selectively operate in one of two alternative states. The two states include a first state in which the LCD operates in a conventional manner to display visible data to a user, and a second state in which the LCD effectively functions as a mirror.

A first aspect of the invention relates to a digital shower controller as set out in independent claim <NUM> of the appended claims.

A second aspect of the invention relates to a shower as set out in dependent claim <NUM> of the appended claims.

A third aspect of the invention relates to a method of manufacturing a digital shower controller as set out in independent claim <NUM> of the appended claims. Embodiments of the invention are set out in the appended dependent claims.

Various embodiments will now be described, by way of example only, with reference to the accompanying drawings:.

According to a first example, there is provided a controller for use in a wet environment such as an ablutionary setting. In embodiments of the claimed invention, the controller is a digital shower controller. The controller comprises a display for displaying information related to the operation of a fluid delivery system. In embodiments of the invention, the display is configured to display information related to the operation of a shower. The display comprises a light source, a semi-transparent layer, and a touch interface configured to provide an input to the controller. The light source and the semi-transparent layer are configured such that the semi-transparent layer absorbs or reflects light transmitted towards the light source and allows light transmitted from the light source to be transmitted from the display, such that the light source appears hidden when light is not transmitted from the light source.

The dual functionality of the display, i.e. displaying information and providing an input to the controller, may remove the requirement for additional components.

The touch interface may comprise any suitable means for providing an input to the controller in response to a touching motion performed by a user of the controller. The touching motion may comprise direct or indirect physical contact, for example between a user's finger and the touch interface. In other examples, the touching motion may comprise a user moving their finger in proximity with the touch interface without the need for physical contact. For example, the touching motion may comprise a user moving their finger to a predetermined distance from the touch interface. For example, the predetermined distance may be at least <NUM> and/or up to <NUM>, or at least <NUM> and/or up to <NUM>, or at least <NUM> and/or up to <NUM>. The touch interface may comprise any suitable touch interface, for example one or more of a capacitive touch interface, a resistive touch interface, a surface acoustic wave interface, or an infrared interface.

The touch interface may be a physical touch interface layer. For example, where the touch interface comprises a capacitive touch interface or a resistive touch interface, the touch interface may be a physical touch interface layer and the touching motion described above may comprise direct physical contact between a user's finger, for example, and the physical touch interface layer. Alternatively, the touch interface may not be a physical touch interface layer. For example, where the touch interface comprises a surface acoustic wave interface, the touch interface may be a layer of ultrasonic waves. In another example, where the touch interface comprises an infrared interface, the touch interface may be a layer of infrared light.

The touch interface may be at least partially transparent. The touch interface may be semi-transparent or transparent.

The touch interface may be formed separately from the semi-transparent layer. The touch interface may be arranged between the light source and the semi-transparent layer, or the semi-transparent layer may be arranged between the light source and the touch interface. The touch interface and the light source may at least partially overlap as viewed in a direction perpendicular to the front of the controller.

The touch interface may not be arranged between the light source and the semi-transparent layer, or the semi-transparent layer may not be arranged between the light source and the touch interface. The touch interface may be spaced from the light source in a direction parallel to the front of the controller, such that the touch interface and the light source do not overlap. For example, the touch interface may be spaced from the light source in a direction parallel to the front of the controller such that the touch interface is spaced to the side of the light source.

The semi-transparent layer may be integrally formed with the touch interface. For example, where the touch interface is a physical touch interface layer, the physical touch interface layer may be treated or otherwise processed such that the touch interface provides the semi-transparent layer. In another example, where the touch interface is a physical touch interface layer, the semi-transparent layer may be first formed separately from the physical touch interface layer before being formed integrally with the physical touch interface layer, for example using an in-mold labelling (IML) process. The semi-transparent layer may be otherwise suitably printed on or bonded to the physical touch interface layer or vice versa.

One or more of the opacity of the semi-transparent layer, the intensity of light transmitted by the light source, and a maximum distance between the light source and the semi-transparent layer may be selected such that the semi-transparent layer absorbs or reflects light transmitted towards the light source and allows light transmitted from the light source to be transmitted from the display, such that the light source appears hidden when light is not transmitted from the light source. One or more of the opacity of the semi-transparent layer, the intensity of light transmitted by the light source, and a maximum distance between the light source and the semi-transparent layer may be selected in dependence on an intensity of light transmitted towards the light source in use, such as ambient indoor lighting.

Ambient indoor lighting herein refers, for example, to light produced by a typical domestic ambient light source, such as an LED, CFL or halogen light bulb, within a typical domestic setting, such as an ablutionary setting (a bathroom for example). Such typical domestic light sources may emit light with an output in the range of <NUM>-<NUM> Watts. In use, the distance between the semi-transparent layer of the display and an ambient light source may be greater than <NUM> meter, greater than <NUM> meters, or greater than <NUM> meters, for example. The intensity of ambient indoor lighting measured at the semi-transparent layer typically may be in the range of <NUM>-<NUM> Wm-<NUM> (Watts per meters squared), for example.

The semi-transparent layer may have an opacity selected such that light transmitted towards the light source in use, for example ambient indoor lighting, is reflected or absorbed by the semi-transparent layer and light transmitted from the light source is transmitted through the semi-transparent layer. The semi-transparent layer may have an opacity selected in dependence on one or more of: the intensity of light transmitted towards the light source in use, for example ambient indoor lighting, as measured at the semi-transparent layer; the intensity of light transmitted by the light source as measured at the semi-transparent layer; and a maximum distance between the light source and the semi-transparent layer; such that the semi-transparent layer absorbs or reflects light transmitted towards the light source and allows light transmitted from the light source to be transmitted from the display, such that the light source appears hidden when light is not transmitted from the light source.

The light source may be configured to transmit light having an intensity measured at the semi-transparent layer greater than an intensity of light transmitted towards the light source in use, for example ambient indoor lighting, measured at the semi-transparent layer. The output of light transmitted by the light source may be in the range of <NUM>-<NUM> W, for example. The intensity of light transmitted by the light source measured at the semi-transparent layer may be at least <NUM> kWm-<NUM> and/or up to <NUM> MWm-<NUM>, for example. Therefore, due to the relative distances of the ambient light source and the light source of the display from the semi-transparent layer, the intensity of light from the light source of the display measured at the semi-transparent layer may be orders of magnitude greater than the intensity of light from the ambient light source measured at the semi-transparent layer.

The intensity of light transmitted by the light source may be selected in dependence on one or more of: the intensity of light transmitted towards the light source in use, for example ambient indoor lighting; the opacity of the semi-transparent layer; and a maximum distance between the light source and the semi-transparent layer; such that the semi-transparent layer absorbs or reflects light transmitted towards the light source and allows light transmitted from the light source to be transmitted from the display, such that the light source appears hidden when light is not transmitted from the light source.

A maximum distance between the light source and the semi-transparent layer may be selected such that light emitted by the light source, in use, is transmitted through the semi-transparent layer. A maximum distance between the light source and the semi-transparent layer may be less than <NUM>, less than <NUM>, less than <NUM>, less than <NUM>, less than <NUM>, or less than <NUM>, for example. A maximum distance between the light source and the semi-transparent layer may be approximately <NUM>, for example, i.e. if the light source and the semi-transparent layer are in contact with one another across an entire surface area of a contacting surface of the light source and the semi-transparent layer. The maximum distance between the light source and the semi-transparent layer may be selected in dependence on one or more of: the intensity of light transmitted towards the light source in use, for example ambient indoor lighting; the intensity of light transmitted by the light source; and the opacity of the semi-transparent layer; such that the semi-transparent layer absorbs or reflects light transmitted towards the light source and allows light transmitted from the light source to be transmitted from the display, such that the light source appears hidden when light is not transmitted from the light source.

Advantageously, when the light source is not turned on, the edges or outline of the light source or any part thereof will not be visible under ambient lighting conditions. The light source appearing hidden when information is not displayed (i.e. when the light source is not turned on) reduces the visibility of any dirt located on the display. In addition, it enables the light source to appear continuous with the surroundings of the display. This advantageously improves the aesthetic appearance of the controller over known controllers which have a display which is not hidden when information is not being displayed.

The semi-transparent layer may cover a major portion of the light source. The semi-transparent layer may cover substantially all of the light source.

The touch interface may comprise a capacitive touch interface. The capacitive touch interface may comprise an indium tin oxide layer. The display may further comprise a conductive protective layer arranged over the top of the capacitive touch interface. In examples in which the capacitive touch interface is arranged between the light source and the semi-transparent layer, the semi-transparent layer may additionally function as a protective layer. In such examples, the semi-transparent layer may be electrically conductive to ensure full functionality of the capacitive touch interface.

The controller may further comprise a processor and a memory device. The memory device may comprise instructions which, when executed by the processor, perform the function of compensating for the presence of water droplets or other debris in contact with the display. In some examples, for example wherein the touch interface comprises a capacitive touch interface, the presence of debris in contact with the display may interfere with providing an input to the controller in response to a touching motion performed by a user of the controller. Compensating for the presence of debris in contact with the display may comprise differentiating between debris in contact with the display and a touching motion performed by the user.

In some examples, including embodiments of the claimed invention, the display further comprises a transparent layer. The transparent layer may be arranged between the light source and the touch interface, or between the touch interface and the semi-transparent layer, or between the light source and the semi-transparent layer. The transparent layer may be used to provide a maximum distance between the light source and the semi-transparent layer, the maximum distance being selected such that light emitted by the light source, in use, is transmitted through the semi-transparent layer. Providing the maximum distance using the transparent layer instead of providing a gap between the light source and the touch interface, or between the touch interface and the semi-transparent layer, or between the light source and the semi-transparent layer may help to maintain the structural integrity of the display.

The transparent layer may comprise, or consist essentially of, a polymeric material, in particular a plastics material. Suitable materials may include a co-polyester variant, polycarbonate or poly methyl methacrylate (PMMA).

The transparent layer may comprise a concave formation. The transparent layer may be curved at least in part. For instance, an outer surface of the transparent layer may be convex.

The transparent layer may have a minimum thickness of at least <NUM> or at least <NUM>. The transparent layer may have a maximum thickness of up to <NUM> or up to <NUM>.

In some examples, including embodiments of the claimed invention, the semi-transparent layer is disposed on a surface of the transparent layer by any suitable means.

The semi-transparent layer may be thinner than the transparent layer. The semi-transparent layer may have a substantially uniform thickness. The semi-transparent layer may have a thickness of up to or at least <NUM> or up to <NUM>.

The semi-transparent layer of any of the above described examples may be black or white. A black semi-transparent layer may improve the legibility of information displayed by the light source, whereas a white semi-transparent layer may be better suited to environments in which the intensity of the ambient lighting is greater. The semi-transparent layer may be any suitable color. Lighter colors in general will reflect more ambient lighting than they absorb, and darker colors in general will absorb more ambient lighting than they reflect. The color of the semi-transparent layer may be selected depending on the intensity of ambient lighting measured at the semi-transparent layer and/or to produce a desired aesthetic appearance.

A shape of a continuous outer edge of the semi-transparent layer as viewed in a direction extending from the semi-transparent layer toward the light source may be different to a shape of a continuous outer edge of the light source as viewed in the same direction. The light source may be rectangular, e.g. square, and one or both of the semi-transparent layer and the transparent layer may not be rectangular, e.g. square. In some examples, the shape of the light source may be any other shape that is different from the shape of the transparent layer and/or the semi-transparent layer. In some examples, the shapes of the light source, transparent layer and semi-transparent layer may all be different.

The configuration of the light source and the semi-transparent layer hides the edges of the light source, both when information is displayed by the light source and when information is not displayed. As such, the shape of the display as a whole takes the appearance of the shape of the semi-transparent layer and/or the transparent layer. The light source may comprise an electronic screen, and rectangular, e.g. square, electronic screens are typically cheaper than round electronic screens, for example. The combination of a round semi-transparent layer and/or transparent layer may therefore allow for a rectangular, e.g. square, electronic screen to be used while the appearance of the display as a whole is round.

The touch interface of any of the above described embodiments may comprise a resistive touch interface. A resistive touch interface may be advantageous in certain environments. In embodiments wherein the touch interface comprises a resistive touch interface, the presence of debris in contact with the display may be less likely to interfere with providing an input to the controller in response to a touching motion performed by a user of the controller.

The touch interface of any of the above described embodiments may comprise a surface acoustic wave interface or an infrared interface.

The light source may comprise an electronic screen. The electronic screen may comprise a liquid-crystal display. The liquid-crystal display may comprise a thin-film-transistor (TFT) liquid-crystal display. The light source may comprise one or more LEDs behind the liquid-crystal display to provide backlighting. The light source may comprise an LED screen.

The light source may comprise an LED. The light source may comprise an array of LEDs. One or more LEDs used to display information may be more suitable than an electronic screen in certain applications. LEDs in general require less power than electronic screens and so may be more suited to embodiments in which the controller is battery powered, for example.

The controller may be battery powered or may be configured to be powered by mains electricity.

According to another example, there is provided a fluid delivery system comprising the controller of any of the above described embodiments.

According to another example, there is provided a fluid delivery system comprising a fluid delivery device and the controller of any of the above described embodiments. The controller is operable to control one or more characteristics of the fluid delivered, in use, by the fluid delivery device.

The one or more characteristics of the fluid may comprise fluid flow and/or temperature.

The fluid delivery system may comprise a valve operable to control flow of fluid to the fluid delivery device and the controller may be operably connected to the valve.

The fluid delivery system may comprise a plurality of fluid delivery devices.

The controller may be configured to permit a user to select any combination of one or more of the fluid delivery devices.

The fluid delivery device(s) may comprise a sprayer, e.g. a shower head.

The system may be coupled to a fluid supply, e.g. a plumbing system providing cold and/or hot water.

According to another example, there is provided a method of manufacturing a controller for use in a wet environment such as an ablutionary setting, the controller comprising a display for displaying information related to the operation of a fluid delivery system and for providing an input to the controller. The display comprises a light source, a semi-transparent layer, and a touch interface. The method comprises providing a light source, a semi-transparent layer, and a touch interface. The method comprises providing a light source, a semi-transparent layer, and a touch interface. The method further comprises configuring the light source and the semi-transparent layer such that the semi-transparent layer absorbs or reflects light transmitted towards the light source and allows light transmitted from the light source to be transmitted from the display, such that the light source appears hidden when light is not transmitted from the light source.

The method may comprise arranging the touch interface between the light source and the semi-transparent layer, or arranging the semi-transparent layer between the light source and the touch interface.

In some examples, including embodiments of the invention, the display further comprises a transparent layer. In some examples, including embodiments of the invention, the method further comprises providing a transparent layer and forming the semi-transparent layer integrally with the transparent layer.

The method may comprise applying the semi-transparent layer to the transparent layer using an in-mold labelling (IML) process. The method may comprise: inserting the semi-transparent layer in to a mold; injecting molten material in to the mold to form the transparent layer; and removing the transparent layer and the semi-transparent layer from the mold as a single piece.

The method may comprise forming the transparent layer using any suitable process, such as a plastic forming process, e.g. injection molding, or an additive manufacturing process.

In some examples, including embodiments of the invention, the semi-transparent layer is formed integrally with the transparent layer. The semi-transparent layer may be applied to the transparent layer by any suitable process, such as inkjet printing, laser printing, painting or adhesion.

Except where mutually exclusive, any of the features of any of the above described aspects may be employed mutatis mutandis in any of the other above described aspects.

<FIG> shows a schematic cross-sectional side view of a controller <NUM>, for use in a wet environment such as an ablutionary setting, according to an example helpful to understand the invention but not covered by the claims. <FIG> shows a schematic cross-sectional side view of a controller <NUM>, for use in a wet environment such as an ablutionary setting, according to another example helpful to understand the invention but not covered by the claims. The controller <NUM> of <FIG> and the controller <NUM> of <FIG> have features in common and like reference numerals will be used to refer to like features. <FIG> and <FIG> are merely illustrative and are not indicative of the relative sizes of the components or of the relative spacing between components of the respective controller <NUM>, <NUM>. Each controller <NUM>, <NUM> comprises a display <NUM> for displaying information related to the operation of a fluid delivery system. The display <NUM> comprises a light source <NUM>, a semi-transparent layer <NUM>, and a touch interface <NUM> configured to provide an input to the controller <NUM>, <NUM>. The light source <NUM> and the semi-transparent layer <NUM> are configured such that the semi-transparent layer <NUM> absorbs or reflects light transmitted towards the light source <NUM> and allows light transmitted from the light source <NUM> to be transmitted from the display <NUM>, such that the light source <NUM> appears hidden when light is not transmitted from the light source <NUM>.

The semi-transparent layer <NUM> does not substantially allow light to be transmitted to the light source <NUM> when light is not transmitted from the light source <NUM>. As such, substantially no light is reflected by the light source <NUM> when light is not transmitted from the light source <NUM>. In certain examples, the light source <NUM> may comprise an electronic light source, such as an electronic screen or an LED. Light may not be transmitted from the light source <NUM> when the light source <NUM> is inactive, for example when there is no power being supplied to the light source <NUM>. When light is transmitted from the light source <NUM>, for example when power is provided to the light source <NUM>, light is transmitted from the light source <NUM>, and through the semi-transparent layer <NUM>, allowing information represented by the light source <NUM> to be visible to a user.

The effect described in the preceding paragraph may be primarily achieved by selecting: the opacity of the semi-transparent layer <NUM>; the intensity of light transmitted by the light source <NUM>; and a maximum distance between the light source <NUM> and the semi-transparent layer <NUM>. One or more of these variables may be selected in dependence on a given intensity of light incident on the display <NUM> in use, e.g. the intensity of ambient indoor lighting. The range of intensity of ambient lighting within a typical ablutionary setting, such as a domestic bathroom, and therefore the range of intensity of light incident on the display <NUM> in use, is readily attainable. The opacity of the semi-transparent layer <NUM>, the intensity of light transmitted by the light source <NUM>, and a maximum distance between the light source <NUM> and the semi-transparent layer <NUM> may be selected in dependence on this range to achieve the effect described in the preceding paragraph.

Within a typical ablutionary setting, there may be provided ambient indoor lighting produced by a typical domestic ambient light source, such as an LED, CFL or halogen light bulb. The opacity of the semi-transparent layer <NUM> may be such that the ambient indoor lighting is reflected or absorbed by the semi-transparent layer <NUM> and light emitted by the light source <NUM> is transmitted through the semi-transparent layer <NUM>. The light source <NUM> may be configured to transmit light having an intensity measured at the semi-transparent layer greater than an intensity of the ambient indoor lighting measured at the semi-transparent layer <NUM>.

In the examples of <FIG> and <FIG>, both helpful to understand the invention but not covered by the claims, the touch interface <NUM> is a physical touch interface layer and the touch interface <NUM> is formed separately from the semi-transparent layer <NUM>. In the example of <FIG>, the touch interface <NUM> is arranged between the light source <NUM> and the semi-transparent layer <NUM>. In the example of <FIG>, the semi-transparent layer <NUM> is arranged between the light source <NUM> and the touch interface <NUM>. The touch interface <NUM> and the light source <NUM> overlap as viewed in a direction perpendicular to the front of the controller <NUM>, <NUM>. In other examples, the touch interface <NUM> may not be arranged between the light source <NUM> and the semi-transparent layer <NUM>, or the semi-transparent layer <NUM> may not be arranged between the light source <NUM> and the touch interface <NUM>. The touch interface <NUM> may be spaced from the light source <NUM> in a direction parallel to the front of the controller <NUM>, <NUM>, such that the touch interface <NUM> and the light source <NUM> do not overlap. For example, the touch interface <NUM> may be spaced from the light source <NUM> in a direction parallel to the front of the controller <NUM>, <NUM> such that the touch interface <NUM> is spaced to the side of the light source <NUM>. In some examples, the semi-transparent layer <NUM> may be integrally formed with the touch interface <NUM>.

In use, the display <NUM> may be configured to display information related to the operation of a fluid delivery system, for example a domestic shower. In some examples, the light source <NUM> may comprise an electronic screen, such as a liquid-crystal display (LCD) or an LED screen, configured to display information in the form of plain text and/or symbols. For example, the electronic screen may display a target water temperature to be delivered by the shower. In some examples, the light source <NUM> may comprise an LED or an array of LEDs. The LED or LEDs may be configured to display information by illuminating or not illuminating. For example, the LED or LEDs may illuminate when a target water temperature to be delivered by the shower has been reached.

The touch interface <NUM> may be configured to provide an input to the controller <NUM>, <NUM>. In use, the light source <NUM> may display one or more input options, for example in the form of one or more icons or symbols, or in the form of text. The touch interface <NUM> may be configured to allow a user to select each of the one or more input options through means of a touching motion in the proximity of the input option. The touching motion may comprise physical contact, for example between a user's finger and the touch interface. In other examples, the touching motion may comprise a user moving their finger in proximity with the touch interface without the need for physical contact. For example, a user may be able to select one of the input options by moving their finger to a predetermined distance from the touch interface in the proximity of the input option. The predetermined distance may be within the range of <NUM>-<NUM>.

In some examples, the touch interface <NUM> may not necessarily be configured to allow a user to select each of one or more input options displayed by the light source <NUM> through means of a touching motion in the proximity of the input option. The light source <NUM> may be configured to display information related to the operation of a fluid delivery system and the touch interface <NUM> may be configured to provide an input to the controller <NUM> independently of the information displayed by the light source <NUM>. In such examples, the touch interface <NUM> is spaced to the side of the light source <NUM> as viewed from the front of the controller <NUM>, <NUM>.

In some examples, the touch interface <NUM> may comprise a capacitive touch interface. The operation of a capacitive touch interface is known, and so will not be discussed in detail here. In short, a capacitive touch interface typically comprises an electrically conductive layer which produces an electrostatic field when power is supplied to the electrically conductive layer. When a user of the controller contacts the capacitive touch interface, either directly or via a second conductive layer provided over the top of the touch interface, the touch interface reacts to the static electrical capacity of the user. This results in a decrease in capacitance of the electrically conductive layer, which is detected by sensors forming part of the touch interface. The controller <NUM>, <NUM> may be configured to interpret this change in capacitance as an input to the controller <NUM>, <NUM>. The controller <NUM>, <NUM> may be configured to produce a control signal in dependence on the change in capacitance.

The presence of debris, such as dirt or water droplets, in contact with the display <NUM> may interfere with providing an input to the controller <NUM>, <NUM> in response to a user contacting the capacitive touch interface. In some examples, the controller <NUM>, <NUM> may comprise software configured to compensate for the presence of debris in contact with the display <NUM>. Compensating for the presence of debris may comprise differentiating between debris in contact with the display and a touching motion performed by the user.

In practice, the touch interface may comprise any suitable touch interface. Examples of touch interfaces which could be used include: a resistive touch interface, a surface acoustic wave interface, or an infrared interface.

In the example of <FIG>, helpful to understand the invention but not covered by the claims, there are no gaps between the light source <NUM> and the touch interface <NUM>, or between the touch interface <NUM> and the semi-transparent layer <NUM>. In some examples, the light source <NUM>, touch interface <NUM> and semi-transparent layer <NUM> may all be of uniform thickness (as viewed from the side as shown in <FIG>). The thickness of the touch interface <NUM> may be less than <NUM> such that the distance between the light source <NUM> and the semi-transparent layer <NUM> is less than <NUM>. In some examples, the thickness and the corresponding distance may be less than <NUM>. In some examples, the light source <NUM> and the touch interface <NUM> and/or the touch interface <NUM> and the semi-transparent layer <NUM> may be spaced apart. In such examples, the light source <NUM> and the touch interface <NUM> and/or the touch interface <NUM> and the semi-transparent layer <NUM> may be spaced apart such that the distance between the light source <NUM> and the semi-transparent layer <NUM> is less than <NUM>. In some examples, the distance may be less than <NUM>.

In the embodiment of <FIG>, helpful to understand the invention but not covered by the claims, there are no gaps between the light source <NUM> and the semi-transparent layer <NUM>. In other examples, the light source <NUM> and the semi-transparent layer <NUM> may be spaced apart. In some examples, the light source <NUM> and the semi-transparent layer <NUM> may both be of uniform thickness (as viewed from the side as viewed in <FIG>). The spacing, the distance between the light source <NUM> and the semi-transparent <NUM> layer may be selected such that light transmitted from the light source <NUM> is transmitted through the semi-transparent layer <NUM> for a given intensity of light transmitted by the light source <NUM>.

In some examples, one of the light source <NUM> and the semi-transparent layer <NUM> may be curved relative to the other of the light source <NUM> and the semi-transparent layer <NUM>. As such, the distance between the light source <NUM> and semi-transparent layer <NUM> may vary over the surface areas of the light source <NUM> and the semi-transparent layer <NUM>. The maximum distance between the light source <NUM> and semi-transparent layer <NUM> is selected such that light emitted by the light source <NUM> is transmitted through the semi-transparent layer <NUM>.

<FIG> shows a schematic cross-sectional side view of a controller <NUM> for use in a wet environment such as an ablutionary setting. In embodiments of the claimed invention, the controller <NUM> is a digital shower controller. The controller <NUM> of <FIG> has features in common with the controller <NUM> of <FIG> and the controller <NUM> of <FIG>. Like reference numerals will be used to refer to like features. <FIG> is merely illustrative and is not indicative of the relative sizes of the components or of the relative spacing between components of the controller <NUM>.

The display <NUM> of the controller <NUM> of <FIG> further comprises a transparent layer <NUM>. In the embodiment of <FIG>, the transparent layer <NUM> is arranged between the light source <NUM> and the touch interface <NUM>. In other embodiments, the transparent layer <NUM> may be arranged between the touch interface <NUM> and the semi-transparent layer <NUM>, or between the light source <NUM> and the semi-transparent layer <NUM>. The transparent layer <NUM> increases the distance between the light source <NUM> and the semi-transparent layer <NUM> compared to the controller <NUM> of <FIG> and the controller <NUM> of <FIG>, while maintaining the structural integrity of the display <NUM>. The thickness of the transparent layer <NUM> (as viewed from the side as viewed in <FIG>) may be selected in order to provide a maximum distance between the light source <NUM> and the semi-transparent layer <NUM>, the maximum distance being selected such that light emitted by the light source <NUM>, in use, is transmitted through the semi-transparent layer <NUM>. The transparent layer <NUM> may have a minimum thickness of at least <NUM> or at least <NUM>. The transparent layer <NUM> may have a maximum thickness of up to <NUM> or up to <NUM>.

In some embodiments, the transparent layer <NUM> may be curved at least in part (as viewed from the side as viewed in <FIG>). The transparent layer <NUM> may comprise a concave polycarbonate shell. In some embodiments, the transparent layer <NUM> may be planar or convex. In some embodiments, the transparent layer <NUM> may be formed of any suitable plastic. The transparent layer <NUM> provides an efficient and cost-effective means of producing the semi-transparent layer <NUM> by disposing the semi-transparent layer <NUM> on a surface of the transparent layer <NUM> (e.g. as described in further detail below).

In the examples and embodiments of <FIG>, the semi-transparent layer <NUM> over-lays the entire surface area of the light source <NUM>. In some embodiments, the semi-transparent layer <NUM> may only over-lay a portion of the surface area of the light source <NUM>. In embodiments in which the light source <NUM> comprises an electronic screen, for example, the semi-transparent layer <NUM> may only over-lay photo-active portions of the electronic screen.

<FIG> shows a schematic front view of a controller <NUM>, for use in a wet environment such as an ablutionary setting, according to another embodiment. The controller <NUM> of <FIG> has features in common with the controller <NUM> of <FIG>, the controller <NUM> of <FIG> and the controller <NUM> of <FIG>. Like reference numerals will be used to refer to like features. <FIG> is merely illustrative and is not indicative of the relative sizes of the components or of the relative spacing between components of the controller <NUM>.

A continuous outer edge of the semi-transparent layer <NUM> is indicated by the solid line in <FIG> and a continuous outer edge of the light source <NUM> is indicated by the broken line in <FIG>. The shape of the continuous outer edge of the semi-transparent layer <NUM> is circular and the shape of the continuous outer edge of the light source <NUM> is square. In other embodiments, the shapes of the continuous outer edges of the semi-transparent layer <NUM> and the light source <NUM> may be any shape such that the shapes are different. In other embodiments, the shapes are the same.

The semi-transparent layer <NUM> of any of the above described embodiments may be black, to absorb light transmitted towards the light source <NUM>, such as ambient indoor lighting, or white to reflect light transmitted towards the light source <NUM>. In some embodiments, the semi-transparent layer <NUM> may be any color suitable to absorb and/or reflect light.

The controller <NUM>, <NUM>, <NUM>, <NUM> of any of the above described embodiments may further comprise a housing. The housing may contain electronic components which are used to produce a control signal in response to an input to the controller <NUM>, <NUM>, <NUM>, <NUM>, as well as provide power to the light source <NUM> and the rest of the controller <NUM>, <NUM>, <NUM>, <NUM>. The controller <NUM>, <NUM>, <NUM>, <NUM> may further comprises a seal to prevent water ingress in to the housing, thereby protecting the electronic components. In some embodiments, the controller <NUM>, <NUM>, <NUM>, <NUM> does not comprise a housing and is instead configured to be installed in a recess in a structure within a wet environment such as an ablutionary setting, for example a recess formed in a bathroom wall. A seal may provide a sealed volume within the recess to house electronic components of the controller <NUM>, <NUM>, <NUM>, <NUM>.

<FIG> illustrates schematically a fluid delivery system <NUM>, for delivering water to a plurality of fluid delivery devices, according to an embodiment. The fluid delivery system <NUM> comprises a fluid delivery device 57a, 57b, 57c and a controller <NUM>, which may be a controller according to any of the above-described embodiments (e.g. the controllers <NUM>, <NUM>, <NUM>, <NUM>). The controller <NUM> is operable to control one or more characteristics of the fluid delivered, in use, by the fluid delivery device 57a, 57b, 57c.

The fluid delivery system <NUM> comprises a first supply pipe <NUM> and a second supply pipe <NUM>. The first supply pipe <NUM> and the second supply pipe <NUM> each convey water to a thermostatic mixer valve <NUM>. The first supply pipe <NUM> carries hot water and the second supply pipe <NUM> carries cold water or vice versa.

An outlet pipe <NUM> carries water at a user-desired temperature from the thermostatic mixer valve <NUM> and communicates with a manifold <NUM> having three branches.

Each branch of the manifold <NUM> has a solenoid shut-off valve 56a, 56b, 56c. A fluid delivery device 57a, 57b, 57c is disposed downstream of each solenoid shut-off valve 56a, 56b, 56c. The solenoid shut-off valves 56a, 56b, 56c are each operable to permit or prevent flow to the fluid delivery device 57a, 57b, 57c downstream thereof.

The fluid delivery devices 57a, 57b, 57c may for example include a plurality of shower sprayheads and/or may include a plurality of spray modes, e.g. provided by different sets of nozzles, from a shower sprayhead.

Operation of the fluid delivery system <NUM> is controlled by the controller <NUM>. The controller <NUM> is operably connected, either by a wired connection or a wireless connection, to the thermostatic mixer valve <NUM>. In use, a user activates the fluid delivery system <NUM> by means an input of the controller <NUM>. For example, where the light source <NUM> comprises an electronic screen, the light source <NUM> may display an icon representing an option to activate the fluid delivery system <NUM>. The user may select the icon by means of a touching motion using the touch interface <NUM>. In response, the controller <NUM> may send a control signal to the thermostatic mixer valve <NUM> to deliver water to the manifold <NUM>. The light source <NUM> may subsequently display information indicative of the temperature of water delivered to the manifold <NUM>. To deactivate the fluid delivery system <NUM>, the user may select an appropriate icon displayed by the light source <NUM> using the touch interface <NUM>. In response, the controller <NUM> sends a control signal to the thermostatic mixer valve <NUM> to stop the delivery of water to the manifold <NUM>, and the power supply to the light source <NUM> is interrupted. The light source <NUM> subsequently appears hidden.

The controller <NUM> is also operably connected, either by a wired connection or a wireless connection, to each of the solenoid shut-off valves 56a, 56b, 56c. In use, where the light source <NUM> comprises an electronic screen for example, the light source <NUM> may display an icon representing an option to activate each of the fluid delivery devices 57a, 57b, 57c. In response to a user selecting one of the icons, using the touch interface <NUM> as described above, the controller <NUM> may send a control signal to the corresponding solenoid shut-off valve 56a, 56b, 56c to permit flow to the corresponding fluid delivery device 57a, 57b, 57c. The user may then select a further icon displayed by the light source <NUM> to deactivate the fluid delivery device 57a, 57b, 57c.

In some embodiments, the light source <NUM> of the controller <NUM> is configured to display information relating to the temperature of water delivered to the manifold <NUM>. For example, in embodiments in which the light source <NUM> comprises and electronic screen, the electronic screen may be configured to display the temperature of water delivered to the manifold <NUM> in plain text. In other embodiments in which the light source <NUM> comprises one or more LEDs, the LED(s) may be configured to illuminate with a first color, for example blue, when the temperature of the water is below a target temperature, and illuminate with a second color, for example red, when the temperature of the water reaches the target temperature. In some embodiments, the light source <NUM> is configured to display information relating to a currently selected fluid delivery device 57a, 57b, 57c. In some embodiments, the light source <NUM> may be configured to display information relating to the pressure of water being delivered by the fluid delivery devices 57a, 57b, 57c.

<FIG> illustrates a method <NUM> of manufacturing a controller for use in a wet environment such as an ablutionary setting, according to an example helpful to understand the invention but not covered by the claims. The controller comprises a display for displaying information related to the operation of a fluid delivery system. The display comprises a light source, a semi-transparent layer, and a touch interface. The method <NUM> comprises: providing <NUM> a light source, a semi-transparent layer, and a touch interface. The method <NUM> further comprises configuring <NUM> the light source and the semi-transparent layer such that the semi-transparent layer absorbs or reflects light transmitted towards the light source and allows light transmitted from the light source to be transmitted from the display, such that the light source appears hidden when light is not transmitted from the light source.

The method <NUM> may further comprise arranging <NUM> the touch interface between the light source and the semi-transparent layer, or arranging the semi-transparent layer between the light source and the touch interface. The method <NUM> may further comprise forming the semi-transparent layer integrally with the touch interface.

<FIG> illustrates a method <NUM> of manufacturing a controller according to an embodiment. The method <NUM> of <FIG> has steps in common with the method <NUM> of <FIG>. Like reference numerals are used to refer to like steps. The method <NUM> further comprises providing <NUM> a transparent layer and forming <NUM> the semi-transparent layer integrally with the transparent layer.

The controller of either of the methods <NUM>, <NUM> of <FIG> and <FIG> may comprise any one of the controllers <NUM>, <NUM>, <NUM>, <NUM> described above.

<FIG> show a schematic representation of a method according to an embodiment. The method may be described as an in-mold labelling (IML) process. The method may be used to manufacture a controller according to an embodiment described herein.

The method begins by providing a mold <NUM> as shown in <FIG>. The mold comprises a first part 120a and a second part 120b. The first part 120a and the second part 120b are attachable to one another. A semi-transparent layer <NUM> having the form of a film is inserted in to the mold <NUM> as shown in <FIG>. The semi-transparent layer <NUM> may be secured to the first part 120a of the mold <NUM> to hold it in place during the molding process. The first part 120a and the second part 120b of the mold <NUM> are then attached to one another as shown in <FIG>. An opening <NUM> is provided at the top of the mold <NUM> when the first and second parts 120a, 120b are attached to one another. A nozzle <NUM> is then inserted in to the opening <NUM>, as shown in <FIG>. Molten material, such as molten polycarbonate, poly methyl methacrylate (PMMA) or any other suitable plastics material, is then injected in to the mold <NUM> via the nozzle <NUM>. This forms the transparent layer <NUM> as shown in <FIG>. The nozzle <NUM> is then removed from the opening <NUM>, the first and second parts 120a, 120b of the mold <NUM> are detached from one another, and the transparent layer <NUM> and the semi-transparent layer <NUM> are removed from the mold <NUM> as a single piece.

Alternatively, the semi-transparent layer <NUM> may be secured in the second part 120b of the mold <NUM> during the in-mold labelling process.

The controllers disclosed herein provide a hidden until lit effect under ambient lighting conditions, which may sometimes be termed a dead front effect. As will be appreciated, the provision of this effect may depend inter alia upon balancing the brightness of the light source with the transmissivity (opacity), thickness and proximity of the semi-transparent layer.

Claim 1:
A digital shower controller (<NUM>, <NUM>, <NUM>, <NUM>), comprising a display (<NUM>) configured to display information related to the operation of a shower, the display (<NUM>) comprising:
a light source (<NUM>);
a touch interface (<NUM>) configured to provide an input to the digital shower controller (<NUM>, <NUM>, <NUM>, <NUM>);
characterized in that
the display (<NUM>) further comprises a semi-transparent layer (<NUM>) and a transparent layer (<NUM>);
in that the light source (<NUM>) and the semi-transparent layer (<NUM>) are configured such that the semi-transparent layer (<NUM>) absorbs or reflects light transmitted towards the light source (<NUM>) and allows light transmitted from the light source (<NUM>) to be transmitted from the display (<NUM>), such that the light source (<NUM>) appears hidden when light is not transmitted from the light source (<NUM>);
and in that the semi-transparent layer (<NUM>) is formed integrally with the transparent layer (<NUM>).