WO2003106772A1 - Device and method for dispensing liquid media - Google Patents

Abstract

The device for dispensing liquids comprises an operating device (7) having a display means (57). The display means (57) can be modified based on the presence of individuals and can be used as a means of advertising and as an aid for operating the device.

Description

Device and method for dispensing liquid media

The invention relates to a device and a method for dispensing liquid media according to the features of patent claim 1.

Devices for dispensing liquid media are known in a large number of different embodiments. Some examples that are not exhaustively listed are water dispensing controls or water fittings and soap dispensers in washstands, bathrooms, showers, toilet facilities or kitchens; Vending machines for coffee and drinks in factories, restaurants or at train stations; Dispensing, dosing or filling devices for food, chemicals, paints, disinfectants, etc. in the industrial, pharmaceutical or hospital sector.

In the sanitary area, water control devices or water fittings are used to adjust the water flow rate and / or the water temperature. In the simplest embodiment, such a water control device or water fitting consists of a single tap that can be turned on and off at the end of a supply line. In addition to valves with a single lead also mixers with two feed lines for hot and cold water ^¬ and with two taps, or with a combination cock or valve tap for simultaneously adjusting the total flow and the mixing ratio of the two feed lines are known. Alternatively, the adjustment devices can be used the total flow rate and the temperature can also be independent of one another. In this case, a mixer tap with a thermostat control can be used instead of a mixer tap based on the determination of the mixing ratio of the two supply lines.

Furthermore, it is known to use electromagnetic valves instead of manually operated taps. These are widely used for fittings on sink units in public toilet facilities, for example in restaurants or train stations. The control is often carried out by an electronic circuit by means of optical sensors built into the outlet fitting or with proximity switches. These open the valve or valves as soon as under the

Outlet opening for the water jet in the vicinity of the sensors to be detected the hands to be washed. In the case of two supply lines, the mixing ratio of cold and warm water can be determined using a mechanically adjustable mixer.

Soap dispensers are known as further sanitary dispensing devices which dispense liquid soap, soap foam or another cleaning agent when a lever is operated manually. Furthermore, it is known that water fittings or

Soap dispensers can be printed with brand or company information or logos. In this case they are carriers of information or advertising messages for the users.

A disadvantage of conventional, electronically controlled water control devices can be that for the setting of the water temperature mechanical, manually operated setting means are provided. These contradict the touchless operation of the valve and are often arranged so that it is difficult for the user to see. The user lacks a reference to the set or adjustable water temperature. In the case of mechanically operated mixed water fittings, the setpoint for the temperature that has been set usually remains unchanged. Regardless of their preferences, users are served with mixed water. That in the

Mixed water in the supply line may also have cooled down again since the last use. As a result, an unnecessarily large amount of energy is used to produce hot water, i.e. Energy is wasted unnecessarily. If a user sets the temperature to a high value and no longer changes, there is a risk that subsequent users could scald their hands. If, in order to avoid this danger, the adjustable temperature range is severely restricted, or if the water temperature is at a predefinable level

If the temperature is fixed, this means a loss of comfort for the user.

In addition to the setting means for the temperature, the information or advertising imprints can also be poorly visible in conventional fittings and are therefore hardly perceived by the user. A disadvantage of conventional soap and disinfectant dispensers is manual operation. It contradicts the sensor-controlled, contactless operation of water fittings and harbors the risk of septic infections, particularly in the hospital area Impurities. The soap or disinfectant is provided in conventional dispensers, for example in plastic bags in a ready-to-use concentration. The bags therefore often have to be replaced.

The object of the present invention is to provide a device with an information medium and a method for dispensing liquid media.

This object is achieved by a device and a method for dispensing liquid media according to the features of patent claim 1.

The control device according to the invention comprises a hood or cover which can be completely or partially backlit. The lighting or backlighting can preferably be controlled depending on the presence of people in the area of the device. The effect of the light that turns on can draw the attention of users who approach the fitting to the device or fitting.

The fitting can be designed in such a way that luminous information or advertising messages can be imaged or projected onto the inside or back of the hood or cover, which likewise draw the user's attention. Alternatively, such information can also be projected through a viewing window in the hood onto a nearby wall or mirror. The information or advertising messages can, depending on the design of the device, be simple interchangeable transparent films or slides can be applied.

Alternatively, information or advertising messages can also be transmitted via a communication device to an electronic control of the fitting or the control device and / or stored there in electronic form. In this case, the display can be projected onto the desired surface using an LCD display or an image generator with a laser or a micromirror matrix. In the same way, alternating images or short film sequences can be displayed instead of fixed images. As an alternative or in addition to the visual display, an acoustic display or a sound generator or a vibrator element or a so-called.

Vibroalarm be built into the valve to transmit an audible or tactile message to the user. In a preferred embodiment, the armature or the control device comprises sensors for detecting people in the vicinity of the armature and further sensors for detecting a hand or a hand movement in the vicinity of the armature. On the basis of the sensor signals, control electronics can control the display device in different ways, depending on whether a person only comes into the detection area of the ambient sensor or whether the close-range sensors additionally detect a hand or a hand movement or the like. In conjunction with these sensor signals, the display can be used as an aid when using the valve. Luminous dots or symbolic representations can point out to the user how or where he should move his hands so that the water flow or the throughput of a liquid can be activated or stopped according to his needs and / or its temperature can be adjusted. Additionally or alternatively, the device can also display further information that is available, for example, from temperature sensors or from the control electronics. The fitting can comprise mechanically movable or non-contacting immobile operating parts.

In a preferred embodiment of water fittings in publicly accessible toilet facilities, the control electronics can include an automatic reset for the water temperature. After a user has left the washstand, the setpoint for the

Water output temperature can be automatically reset to cold water.

The control device can be designed for installation in new sanitary installations or for retrofitting existing such installations. It can include a complete fitting with operating device or a retrofittable fixed or rotatable, one- or multi-part hood. The control device can be supplied with power via a low-voltage or a low-voltage mains cable or via a battery or a rechargeable battery. In the latter case, a transparent photovoltaic film can be arranged in the translucent area of the fitting. With the control device according to the invention, depending on its design, other media can be used instead of water such as liquid soaps, therapeutic liquids, disinfectants, paints, beverages or the like.

The device can be made entirely or partially of plastic. In the case of water fittings on washbasins, the control or regulating valves can e.g. be integrated into the fitting or arranged in a control box in the wall or under the washbasin. If the control elements are arranged outside the fitting, the fitting protruding from the washstand can be used without restrictions as an electronic display and / or operating part.

With the aid of the following figures, the invention is described in more detail using the example of a water control device and a soap dispenser. Show

FIG. 1 shows a perspective illustration of a washstand with a built-in, partially visible water control device,

Figure 2 shows a longitudinal section through an analog to

1 configured control device of the water control device, FIG. 3 a schematic illustration of the projection of an image onto the rear wall arranged behind an operating part, seen from the side, FIG. 4 a perspective illustration of a

Faucet with an operating device seen from the water outlet side, 5 shows a circuit board with light sources and

Detection means, Figure 6 is a schematic representation of the

Water control device, Figure 7 shows a longitudinal section through a water fitting with a retrofitted two-part hood, Figure 8 shows a washstand with a soap dispenser and a water dispensing fitting.

1 shows a water control device 1 on a washstand 3. The water fitting comprising a water outlet 5 and an operating device 7 or a control element projects from the wash basin 3 between a wash basin 9 and a rear wall 11 adjoining the wash basin 3.

The operating device 7 comprises an at least partially translucent cover or hood 13. The hood 13 is preferably made as a one-piece injection molded part made of opaque or transparent plastic such as acrylic or polycarbonate. The hood 13 can also be a one-piece or multi-piece combination of transparent and / or opaque and / or opaque plastic. Alternatively, the hood 13 can be made of transparent plastic with an internal or external opaque and / or opaque coating or partial coating. The lobe-shaped area represented by a broken line E represents the detection area of a person sensor arranged behind a window 45d in the hood 13. As can be seen from the longitudinal section through a fitting in the area of the hood 13 shown in FIG Hood 13 comprise a cover 15 and a cylindrical jacket 17 with an outer diameter Dl. The lowermost section of the jacket 17 can have an outer diameter D2 that is smaller than that of D1 and can be inserted into a metallic base part 19 of the fitting. Alternatively, the base part can also be made of plastic. For concentric positioning of the hood 13 in the base part 19 and for sealing the inner region from the outer region of the fitting, one or more clamping rings 21 and / or O-rings 23 can be inserted between the hood 13 and the base part 19. These can be held in their vertical position by inside and / or outside circumferential grooves or notches on the jacket 17 or on the base part 19. The seat of the hood 13 on the base part 19 can additionally be secured by one or more grub screws 25 or similar fastening means. An electronic circuit board 27a rests on a shoulder 29 arranged on the inside of the base part 19 and is held in its position from above by the end face of the jacket 17 in a non-positive or positive manner. to

Prevention of rotational movements of the board 27a, the jacket 17 may include, for example, pins or tabs which engage in bores or edge recesses on the board 27a (not shown). Below the cover 15, the jacket 17 comprises on its inside a conical mounting groove 30 with a diameter increasing towards the cover 15. In this assembly groove 30, a slide 31 adapted to the circular shape of the cover 15 or a film disc or foil can be inserted in an exchangeable manner. As an alternative or in addition, a piece-wise circumferential on the inside of the jacket 17 can also be used interrupted web 33 can be used for this purpose. Mounting groove 30 and web 33 can thus be used as a holder for a slide 31.

A second circuit board 27b is connected to the first circuit board 27a and held on the latter via spacers 35, which can be designed as electrically conductive plug connectors. The second circuit board 27b is arranged approximately at the level of the upper end face of the metallic and thus non-transparent base part 19. It comprises a central light source 37a, for example a light bulb or a fluorescent lamp. Alternatively or additionally, e.g. one or more light-emitting diodes can also be used as the central light source 37a, preferably a combination of a plurality of light-emitting diodes of different colors, the common color spectrum of which can be perceived by the eye as approximately white light. In a special embodiment of the invention, the light source 37a can be arranged outside the hood 13, e.g. under the wash basin 3 or in a distribution box integrated into the rear wall 11 (not shown). The

In this case, light is guided through the light guide to the desired location under the hood 13, wobe.i this light guide together with electrical feed and / or control lines and / or the hot and / or cold water supply lines in a pressure-proof hose from the distribution box to

Base part 19 of the valve can be performed. Optical aids can be arranged in the region of the central light source 37a, for example a reflector 39, with the aid of which the light generated by the light source 37a can preferably be reflected toward the cover and / or the upper region of the jacket 17, or one Lens optics (not shown) between the light source 37a and the hood 13. The design of the hood 13 and the arrangement of the light source (s) 37a enable uniform or continuous illumination of the hood 13 without casting shadows.

In addition or as an alternative to the central light source 37a, further light sources 37b such as light-emitting diodes or laser diodes can be arranged on the second circuit board 27b. The control device 7 shown in FIG. 2 comprises a plurality of red light-emitting diodes on the left-hand side and a plurality of blue light-emitting diodes on the right-hand side, which can be switched individually or together or whose brightness can be dimmed or controlled. Analogous to the central light source 37a, the light sources 37b can be supplemented with reflectors or other optical aids, so that the desired light effect (preferably in the area of the jacket 17) can be generated. On the right in FIG. 2, blue light-emitting diodes are used as light sources 37b, which are connected to the jacket 17 via light guides 41 or bundles of light-guiding fibers. The light guides 41 can be connected to the hood 13 in the region of the cover 15 and / or the jacket 17. Alternatively, the. The end faces or ends of the light guides 41 can be held close to the inside of the hood 13 by suitable holding means (not shown). The upper two of the three light guides 41 shown are inserted into recesses 43 in the hood 13. The recesses 43 can be partially embedded in the jacket 17 or the cover 15 or penetrate them completely. The end region of the lowermost of the three light guides 43 was directly into the hood 13 during the manufacture of the hood 13 cast. The cast end face of this light guide 41 can be arranged flush with the outside of the jacket 17 or slightly offset inwards. Instead of or in addition to the light-emitting diodes, one or more laser diodes can also be arranged on the circuit board 27b. Using a micromirror optics controlled by a controller, 13 light effects can be generated at different points on the hood (not shown).

In a further embodiment of the invention, a display, in particular an LCD display, or a micromirror matrix can also be arranged on the circuit board 27b. A lens or mirror optic images these imaging elements on the inside of the cover 15 (none

Presentation) . Alternatively, such an image can also be projected through a transparent window 45 in the jacket 17 onto the rear wall 11 arranged behind the wash basin 9, as shown in FIG. This is analogous to a projector or an overhead projector, such as those used to project computer data onto a projection screen.

FIG. 3 shows one of two round windows 45 embedded in the side of the jacket 17. Such windows 45 can be inserted, glued or welded into recesses on the hood 13. It is also possible to produce such windows 45 using an injection molding process that processes two components. They are then connected in one piece to the rest of the hood 13. The round windows 45 are bordered in a ring shape by the ends of light guides 41. FIG. 4 shows a fitting with an operating device 7 in perspective from the side of the water outlet 5. Behind the two round windows 45a and 45b arranged on the right and left of the jacket 17 there is an optical one as the detection means 7 (FIG. 5)

Short-range sensor (not shown) arranged. These short-range sensors can comprise, for example, an infrared transmitter and an infrared receiver, the transmitter preferably periodically at regular or random intervals in the range from milliseconds to

Seconds sends a coded pulse train. If a hand or other reflective object is close to the transmitter / receiver pair, the radiation reflected on the receiver is high enough to trigger a control signal. The sensitivity of the sensor is preferably set so that a hand or a finger can still be recognized in the vicinity of the sensor, for example 10 cm, but objects which are further away are not. Interference signals can be masked out by coding the pulse sequences, for example with long and short pulses or pulse pauses. A close-range sensor is likewise arranged behind the window 45c on the cover 15. Behind the window 45d on the front of the jacket 17, a further area means 47 is a long-range sensor which is used to detect people in an environment of the operating device, for example in a club-shaped area E (FIG. 1) of about 1.5 m in length and an opening angle serves from about 30 ° to 60 °. These sensors can also be optical sensors operating according to the triangulation principle and a plurality of photodiodes or other optical receivers. As an alternative, passive infrared motion detectors can also be used for the detection of people, in which case the window 45c preferably comprises an arrangement of Fresnel lenses. Of course, any other type of sensor suitable for this purpose can also be used, for example ultrasonic sensors, capacitive sensors or radar sensors. FIG. 5 shows a possible arrangement of light sources 37a, 37b and detection means 47. The

Light sources 37b and the detection means 47 can be connected to the hood 13 via light guides 41 (FIG. 2) or the ends of the light guides 41 can lie directly under the hood 13. The light guides 41 leading to the detection means 47 end in the area of the windows 45a-d (FIG. 4). Of course, the detection means 47 can also be arranged without a light guide 41 directly under the hood 13 or in the area of windows 45a-d.

FIG. 6 shows a schematic representation of a sanitary installation with a water control device 1. A connecting cable 49 is connected to control electronics 51 in a fixed or pluggable manner. It can be connected to a low voltage source with, for example, 5V, 12V or 24V direct or alternating voltage. The

Control electronics 51 comprise a supply 53 and preferably a processing unit 55 with a microcontroller for providing one or more operating voltages. The operating device 7 is represented by a broken line in FIG. 6 and comprises a display means 57 belonging to a display device and a plurality of sensors as detection means 47. The display means 57 can be, for example, the hood 13 or a cover or a micromirror matrix. Audible sounders and tactile vibrating elements also belong to display means 47 in the sense of the invention. The> detection means 47 and the display means 57 are connected to the control electronics 51 via signal lines. Additional detection means 47 can also be arranged outside the operating device 7, for example a temperature sensor on a water pipe 59, which opens in the form of a water outlet 5. The water line 59 comprises a cold water line 61a and a hot water line 61b on the inlet side, each with an actuator 63. Alternatively, only one inlet line with an actuator 63 can also be provided. The actuator 63 can be, for example, a solenoid valve or a continuously or step-by-step control or regulating valve by means of an electric motor, or a manually operated valve in the form of a tap. Instead of two actuators 63 in each of the feed lines, the actuator 63 can also be arranged in the area of the water line 59 or in the connection area of the feed lines and water line 59 (not shown), for example in the form of a manually operated single-lever mixer. The actuators 63 can influence a flow rate and / or a mixing ratio. In the example shown in FIG. 6, the actuators 63 are control valves which can be adjusted by an electric motor and which are connected to the control electronics 51 and can be controlled thereby. The operating device 7, the control electronics 51 or individual components of the control electronics 51 and the actuators 63 can be spatially separated from one another or partially or completely combined. In particular, a plurality of water fittings can comprise centrally located common control electronics 51. The detection means 47 and / or the display means 57 and / or the actuators 63 can be connected, for example, via control lines or a system bus such as the EIB. Actuators 63 for soap dispensers and / or towel dispensers can also be controlled in an analogous manner. FIG. 7 shows a converted water fitting with a two-part hood 13. The hood 13 comprises an adapter 65 which is rotatably held on the existing base part 19 and an opaque head piece 67 fastened to the adapter 65 by means of a screw or snap connection. The power supply for the control electronics 51 (FIG. 6) and / or the

Light source 37a or 37b is ensured by means of a transparent photovoltaic film 69 which is preferably in direct contact with the inside of the translucent hood 13 or on the slide 31 and / or a rechargeable battery or a battery 71 arranged on the circuit board 27b. To insert or replace the slide 31 or the battery 71, the connection between the head piece 67 and the adapter 65 can be released using a tool and the head piece 67 can be lifted off. Detection means 47 for detecting a

Rotational movement or a position angle can be arranged relative to the base part 19. The control electronics can, for example, display the mixing ratio or the temperature on the basis of the measured variables determined by these detection means 47. Such retrofittable hoods 13 or control devices 1 can be used, inter alia, in fittings with a self-resetting, manually activatable push button for water dispensing. The activation of the display means 57 or the light source 37a can be sensor-controlled or via a microswitch when the push button is pressed.

FIG. 8 shows a washstand 3 with a water control device 1 and an active substance dispenser 73 constructed analogously thereto. Both are devices for dispensing liquids in the sense of the present invention. Instead of water, liquid soap or disinfectant, for example, is dispensed at the active ingredient dispenser. The mode of operation of the device according to the invention is explained below using the example of the water control device 1 in a public toilet system:

As soon as a person goes into the detection area E (FIG. 1) of the far-range sensor, this detects the

Control electronics 51 and turns on the central light source 37a. Similarly, the room light is switched off again after leaving the room. The slide 31 - if such is inserted into the hood 13 - is imaged or projected onto the inside of the hood 13. Alternatively, an image can also be projected onto the rear wall 11. At the same time or with a slight delay, the area of the transparent window 45c (FIG. 4) is marked by means of one of the further light sources 37b. This can be done, for example, by a shining or flashing hand symbol depicted on the inside of the hood 13 or by a circular ring around window 45c or by a pilot point next to window 45c. In a special embodiment, the far-range sensor can be designed such that it detects the user's approach to the fitting, for example in the range of 1 m or 1.5 m, after which the pilot point is enlarged or further illuminated. This indicates to the user the change from ready mode to active operating mode. If the user moves his hand close to the window 45c, this is detected by the associated short-range sensor and the control electronics 51 with the associated actuator 63 open the valve in the cold water line. Of course, a throttle element for limiting the flow rate can be installed in the water line 59. If the near-range sensor can also detect the distance of the hand and / or the movement or direction of movement of the hand in addition to the presence, and if the actuator 63 can be controlled or regulated, the control electronics 51 can determine the flow rate or quantity depending on this

Control or regulate the measured variable. Alternatively, the dwell time of the hand in front of window 45c can be used to change the flow rate. First, a predefined flow rate is set with the actuator 63. If the hand stays longer in front of the window 45c, the flow rate is increased cyclically and decreased again.

By varying the brightness or the flashing frequency or the number of luminous points in a luminous line or by varying the outside diameter of the luminous ring around the window 45c, the temporal Flow rate can be visualized. The actuator 63 interrupts the water flow when the user again holds his hand in front of the window 45c and / or when the far-range sensor can no longer detect any person in the detection area E (FIG. 1).

In an analogous manner, the user is made aware of the setting option for warmer or colder water with red or blue pilot points which glow or flash or the like in the area of the windows 45a and 45b. If the related

Detect short-range sensors the presence or movement of a hand, the controller can control the actuators 63 in the hot and cold water pipe in such a way that the set amount of water remains constant and the water temperature changes according to the requirements of the user. The setting or change in the water temperature at the water outlet 5 can be controlled by setting a mixing ratio of cold and warm water or regulated by feedback of the water temperature from a temperature sensor on the water line 59. The water temperature can be displayed graphically or as a numerical value on the display means 57 as information for the user. The operation of a soap dispenser 73 arranged next to the water fitting and / or a towel dispenser (not shown) can also be carried out in an analogous manner. The short-range sensor can be arranged such that active substance or liquid soap is dispensed or sprayed out when a hand is under the outlet pipe. The water control 1 and the soap dispenser 73 can comprise common control electronics 51. The release of the Soap dispenser 73 can, for example, be tied to the condition that the hands were first wetted with water in the water fitting. In addition, guidance of the user is possible, for example by first being asked to wet the hands with a soap-water mixture, then to rinse under the water jet and finally to dry the hands (display on the operating device 7 or on a towel dispenser). The individual stages can be visualized in different colors, for example.

By guiding or instructing the user and by specifying the time periods for the individual sub-steps, the Benutzex can be brought to a perfect hand hygiene, which means in particular in places and at times with increased

Preventive protection can be brought about. The sequence within the cleaning cycle, the duration of the individual sub-steps and the means used can be designed differently depending on the place of use and the respective circumstances. at

Impact mode, e.g. during event breaks, the controller 51 can detect the increased frequency of use and shorten the times for the individual process steps. In a further embodiment of the invention, an additional detection means 47 can be provided, with which a closure valve 75 (FIG. 1) in the wash basin 9 can be opened and closed.

The device can comprise additional input, detection or control means with which the system can be switched off or deactivated. For example, a transponder can be provided that Identifiers carried by the service or maintenance personnel are recorded, so that when cleaning the sanitary facility or when refilling soap or detergent, the dispensing of water and / or detergent can be suppressed or controlled in some other way.

In a further embodiment, the device for detecting vandalism files can comprise a vibration sensor and, when activated, transmit a warning message to a control center and / or dim the room light and / or display a warning message on the display means 57.

Claims

claims 1. Device for dispensing liquids, comprising an operating device (7) for ^Beeinflus' sen at least one predetermined size, characterized in that the operating device (7) at least one display means (57) a with a control electronics (51) influenced display device and at least one detection means ( 47). 2. Device according to claim 1, characterized in that the display device comprises at least one light source (37a, 37b) and that the display means (57) comprises an at least partially translucent hood (13) or cover. 3. Device according to claim 2, characterized in that the light source (37a, 37b) comprises a light emitting diode and / or a laser diode and / or a light bulb and / or a fluorescent lamp. 4. Device according to one of claims 2 or 3, characterized in that the hood (13) or cover is at least partially made of transparent and / or opaque plastic. 5. Device according to one of claims 2 to 4, characterized in that one or more light guides (41) and / or optical lenses and / or reflectors (39) and / or other elements influencing the light propagation are provided. 6. Device according to one of claims 2 to 5, characterized in that the hood (13) or cover comprises one or more recesses and / or transparent windows (45a-d) and / or end regions of light guides (41). 7. Device according to one of claims 1 to 6, characterized in that the display device comprises a holder for the releasable insertion of a slide (31) or a film. 8. Device according to one of claims 1 to 7, characterized in that the display device comprises an image generator. 9. Device according to one of claims 1 to 8, characterized in that the detection means (47) has a far-range sensor for detecting people in the vicinity of the operating device (7) and / or at least one near-range sensor for detecting the presence or movement or the Direction of movement of hands or fingers in the vicinity of the control device (7) comprises. 10. With a device according to one of claims 1 to 9 feasible method, characterized in that the detection means (47) detects people as they approach the operating device (7) and the control electronics (51) causes the state or behavior of the Display device and / or the To change display means (57). 11. The method according to claim 10, characterized in that when people approach the operating device (7) and / or when people are present in the vicinity of the operating device (7), the light source (37a, 37b) or the light sources (37a , 37b) switched on or their brightness or brightnesses changed. 12. The method according to claim 11, characterized in that by means of the display device, visual information is projected or displayed on the display means (57), and / or that acoustic information is reproduced. 13. The method according to claim 11, characterized in that on the display means (57) one or more detection areas of the one or more detection means (47) are marked or highlighted for the operation of the device. 14. The method according to claim 13, characterized in that information about the liquid flow and / or the liquid temperature is displayed on the display means (57). 15. The method according to any one of claims 10 to 14, characterized in that the detection means (47) the absence of people in the area Control device (7) and the control electronics (51) caused to change the state or behavior of the display device or the display means (57).