EP3232428A1 - Display element, display device with such a display element and electric device with such a display device - Google Patents

Abstract

A display element (20) for a display device (18) has a display housing (22) and a light guide channel (24) in the display housing (22) extending continuously from a lower side (25) to an upper side (26) for a light display function. of the display housing. The Lichtleitkanal (24) is opaque to the side, wherein on the upper side (26) of the display housing (22) on the Lichtleitkanal (24) an opaque coating (42) is applied. At least on two outer sides of the display housing (22) non-elastic spacers (32a-d) are provided, which project beyond the upper side (26) of the Lichtleitkanals (24) and are higher. For an operating function, the spacers (32a-d) are electrically conductive and form capacitive sensor elements.

Description

Field of application and state of the art

The invention relates to a display element for a display device, a display device provided with such a display device and an electrical appliance with such a display device.

Indicators for a display device, which have a luminous display function and, moreover, even an operating function, are known in the art EP 2809006 A1 known. In a display housing is a Lichtleitkanal in the form of a light guide, which is enclosed laterally opaque, so that light can escape only at its top. The light guide channel is surrounded like a frame of elastic material, which is electrically conductive and has a capacitive sensor element for the operating function. Such display elements can be provided with an operating function designed as corresponding illuminated capacitive sensor elements. Possible arrangements of a plurality of such display elements with operating function are from the DE 102009049559 A1 basically known.

Task and solution

The invention has for its object to provide a display element, a display device provided therewith and provided therewith an electrical appliance with which problems of the prior art can be solved and it is particularly possible to provide a practical design of a display element, in particular can be pressed against an underside of a display panel or a cover and it is protected against damage, in particular at the top of the Lichtleitkanals.

This object is achieved by a display element having the features of claim 1, by a thus provided display device with the features of claim 12 and by an electrical appliance provided with the features of claim 15. Advantageous and preferred embodiments of the invention are the subject of further claims and will be explained in more detail below. Some of the features are described only for the display element, only for the display device or only for the electrical appliance. However, they should be independent of both the display element and the display device and the electrical appliance can apply independently. The wording of the claims is incorporated herein by express reference.

For a luminous display function, the display element has a display housing and a light channel therein, which extends continuously from a bottom to an upper side of the display housing. The light guide channel consists of translucent material, advantageously completely transparent for optimum luminous efficacy or translucent for a homogenization of a light indicator. Under the underside of the light channel, a light source is advantageously provided, for example, at least one LED or SMD LED. The Lichtleitkanal is opaque to the side or surrounded, so that no unwanted luminous phenomenon can occur to the side, which could adversely affect the light display function from above. On the top of the display housing, an opaque coating is applied to the light guide, for example by means of a dipping process or alternatively sprayed. This opaque coating may be a kind of paint. It can be removed either in production of the display element per se or even laterally, so that it is formed in a section that determines the light indicator with its shape. This is basically known and will be explained in more detail below.

At least two outer sides of the display housing spacers are provided, which project beyond the top of the Lichtleitkanals or are higher, so over the top of the light channel projecting upwards. In this case, the material of the spacer is electrically conductive for an operating function and thus forms a capacitive sensor element at the top of the display element, whereby a capacitive operating sensor is formed. These spacers, which are made of non-elastic material and / or non-elastic or constructed, serve to abut itself on an underside of a display panel or a cover and that can not abut the top of the Lichtleitkanals with the coating on this underside , By this concern, namely, the coating of the top could be damaged or removed, so that it could lead to unwanted luminous phenomena. The spacers thus form a non-elastic and thus safe protection for the top.

A height of the spacers may be variable, in particular depending on the size of the display element. Advantageously, the height of the spacers is about 0.5% to 10% of the height of the entire display element. The spacers should not be too large, so the distance from the top of the light pipe to the bottom of the control panel cover not too big. Thus, the light display function is still sufficiently well to recognize or gives a sufficiently sharp picture.

In an embodiment of the invention, the Lichtleitkanal may be surrounded to the side of opaque plastic, advantageously completely surrounded. It is particularly advantageous possible to produce this in a multi-component injection molding process, for example, polycarbonate or two different materials based on polycarbonate. An underside of the light guide channel is provided or left free for a light entry from a light source arranged thereunder. The top of the light channel has just the opaque coating, in which at least one section may be provided in the form of a symbol or a plurality of symbols for the light display function. In a preferred embodiment of the invention, the coating also covers the spacers and thus the complete upper side or possibly even the entire upper region of the display element. Also on the sides, the coating may be provided and / or completely cover it. The coating is an easily removable lacquer or is advantageously removable by laser, so that relatively easily and contactlessly the aforementioned cutouts in the form of a symbol or a plurality of symbols can be produced therein to adapt the light display function.

In a further embodiment of the invention, the spacers may be provided at least on opposite sides of the display housing. This has the advantage that then the power under certain circumstances system of the display element on the underside of a display panel is evenly or plane-parallel to the top of the Lichtleitkanals. Advantageously, the spacers each extend substantially over the full width of this page, under certain circumstances, the corner areas may be excluded. Particularly advantageously, the spacers are formed on all sides completely encircling the display housing, so that they frame the top of the Lichtleitkanals. Preferably, they frame this without interruption, so they are continuous. Small breaks in the longitudinal course of the spacers may be provided, for example, to allow the introduction of air to the top of the Lichtleitkanals.

The material of the spacers is advantageously polycarbonate, but an opaque. It can also be molded onto the light guide channel in a multi-component injection molding process, which is easier with fundamentally similar material.

It is possible to provide a spacer on a lateral outer wall of the display housing, this lateral outer wall surrounding the Lichtleitkanal outside or forms an outer side of the display housing, wherein advantageously all the outer walls are circumferentially formed and envelop the Lichtleitkanal to the side. Particularly advantageously, all spacers of the display element can be provided on outer walls.

In an embodiment of the invention it can be provided that at least in a lower region of the light guide channel, a light guide channel is at least partially provided laterally outwardly and / or downwardly limiting reflector. This reflector is made of opaque material, wherein it is covered on short outer sides of an elongate display housing of the material of the spacers. On long outer sides of an elongated display housing, it can be uncovered laterally outwards, ie itself form an aforementioned outside or outer wall. Above all, such a reflector extends partially obliquely to the upper side of the light guide channel in order to deflect as much light as possible from a light source arranged below the light guide channel upwards for a luminous display function which is as clearly visible as possible. The material of such a reflector should be selected so that it has the best possible reflective effect when brought into contact with a light-transmitting material of the light guide channel at the interface of the two materials.

If a display housing is oblong, that is not square, then it can be provided that at least one downwardly projecting and over a bottom of the Lichtleitkanals projecting down holding member is provided on short outer sides of the display housing, which are opposite. On these short outsides this is given more space with an elongated display housing than on the long outer sides. If the display housing rather square, it does not matter on which outer sides such retaining members are provided. However, they should be provided on opposite outer sides for a stable mounting on a component carrier.

In an advantageous embodiment of the invention, the opaque coating, which is applied to the top of the Lichtleitkanals, be applied to all lateral outer sides and the other surface or top of the display housing. In particular, it may also be applied to the spacers, wherein it fulfills no purpose here, but just to ensure that the top of the Lichtleitkanals is completely covered.

The light guide channel may be surrounded in another embodiment of the invention in its upper region of opaque material. This opaque material may form a peripheral edge, which may for example form a plane plane with the top of the Lichtleitkanals. The opaque material then corresponds to the aforementioned outer sides or outer walls of the display housing made of opaque material.

At least partially, the spacers can be placed on the aforementioned edge on the outer walls around the light guide channel or integrally formed. Advantageously, the spacers are offset 5% to 50% of the width of the edge away from the light guide to the outside and have a distance, so are slightly spaced from the boundary between the inner Lichtleitkanal and outer edge or outer wall. This has the sense that the spacers are advantageously also covered by the same opaque coating as part of the top of the Lichtleitkanals. If the coating on the upper side of the spacers is now scraped away by the abutment of the spacers on an underside of a display control panel, there is a risk that chipping on the lateral sides of the spacers will also release a side region of the upper side of the light guide channel, primarily due to manufacturing tolerances. Then there could be an unwanted luminous appearance here. Furthermore, the application of the coating to one side of a spacer that goes straight up from the boundary between the edge and the light guide channel is not so possible. By offsetting the spacers a distance away from the boundary between the light guide channel and the edge, these problems are avoided. A distance of the spacers to the light guide channel may be at least 0.05 mm to 0.1 mm.

An electrical contact to the capacitive sensor element or to the capacitive operating sensor can take place in that electrically conductive material contacted or departed from the spacer and is easily contacted electrically, for example on a component carrier to which the display element is set.

In a further embodiment, it is possible for the electrically conductive material of the spacers to be integrally connected to the spacers or to form them in one piece. Furthermore, the material may be integrally formed in the aforementioned holding members for making an electrical contact. For this purpose, at least one hole can be in the component carrier as a receiving opening into which a holding member is inserted. Here, an electrical contact can take place, for example by the receiving openings in the component carrier inside are coated electrically conductive and thus automatically produce the electrically conductive spacers when pressed electrical contact.

Advantageously, a display element has a light-conducting body of transparent or transparent material. In a lower region of the light guide channel, a reflector may be provided surrounding or molded. This covers the Lichtleitkanal to the side against unwanted light leakage and provides for a strengthening of the lighting upwards. At least in the upper region of the Lichtleitkanal is surrounded on all its sides with electrically conductive and opaque material, which forms outer walls that actually protrude to the height of the top of the Lichtleitkanals or form a substantially planar plane with them. At these edges above the spacers are then formed or stand up from the edges.

Advantageously, a cross section or a profile of such a spacer is substantially rectangular. In any case, the spacers, by being non-elastic, ensure that when the display elements are pressed against undersides of display panels or covers which may not be perfectly flat, the tops of the light guide channels with their sensitive coating are not affected or destroyed or scratched.

A display device according to the invention may comprise a component carrier, on which a plurality of electrical functional units such as in particular a controller and also other parts are arranged. At least one display element according to the invention is arranged on the component carrier, advantageously several. This is on the DE 102009049559 A1 directed.

A light source for the light display function is arranged below the light channel of the display element on the component carrier. Advantageously, several light sources or LED per display element can be provided below the light channel. Thus, either a brighter luminous appearance or a switchable color of a luminous display function can be achieved.

An aforementioned hole may also be provided on said component carrier into which a holding member for fastening the display element can be inserted. Since the holding member advantageously also consists of electrically conductive plastic, an electrical contacting can take place here. For this purpose, the hole on its inside electrically conductive be coated, advantageously as a so-called via. When pressing the holding member results in an electrical contact, which is durable and reliable.

An inventive electrical appliance has a display control panel or a cover, under which a display device according to the invention is arranged. In this case, the display device or display elements arranged thereon are advantageously pressed against an underside of the display control panel or the cover. In a preferred embodiment of the invention, the electrical appliance is a cooking appliance, in particular a hob. Cooktops with hobs made of ceramic glass often have a rough underside on the hob plate, also known as Noppung. Namely, these nubs with a width of a few mm and a height of less than 1 mm could damage the coating on the upper side of the light guide channel in such a way that undesirable light phenomena could occur.

The spacers can odgl by carbon fibers. made conductive plastic or polycarbonate. Alternatively, carbon black or graphite could also be used. An ohmic resistance is in the range of less than 300 Ω to 3 kΩ, so it is relatively well conductive.

These and other features will become apparent from the claims but also from the description and drawings, wherein the individual features each alone or more in the form of sub-combinations in an embodiment of the invention and in other fields be realized and advantageous and protectable Represent embodiments for which protection is claimed here. The subdivision of the application in individual sections as well as intermediate headings do not limit the statements made thereunder in their generality.

Brief description of the drawings

Fig. 1

eine seitliche Schnittansicht durch ein erfindungsgemäßes Kochfeld als Elektrogerät mit einer Anzeigevorrichtung mit einem erfindungsgemäßen Anzeigeelement,

Fig. 2

einen Querschnitt durch das Anzeigeelement aus Fig. 1 ohne die Anzeigevorrichtung,

Fig. 3

eine Draufsicht auf das Anzeigeelement aus Fig. 1 ohne Anzeigevorrichtung,

Fig. 4

eine Unteransicht des Anzeigeelements,

Fig. 5

eine Ansicht auf die kurze Außenseite von außen des Anzeigeelements und

Fig. 6

zwei verschiedene angedeutete Varianten von Anzeigeelementen mit mehreren LED als Lichtquellen darunter.

Embodiments of the invention are shown schematically in the drawings and are explained in more detail below. In the drawings show:

Fig. 1

a side sectional view through an inventive hob as electrical appliance with a display device with a display element according to the invention,

Fig. 2

a cross section through the display element Fig. 1 without the display device,

Fig. 3

a plan view of the display element Fig. 1 without display device,

Fig. 4

a bottom view of the display element,

Fig. 5

a view on the short outside from the outside of the display element and

Fig. 6

two different indicated variants of display elements with multiple LEDs as light sources underneath.

Detailed description of the embodiments

In the Fig. 1 is a sectional view through an inventive hob 11 shown as an electrical appliance, as this essentially also the Fig. 1 the aforementioned EP 2809006 A1 equivalent. The hob 11 has a hob plate 13, preferably made of conventional glass-ceramic material with reddish-brown color and low light transmission. An underside of the hob plate 13 has the known knobs 15, which have a distance of a few millimeters to each other and have a height of 0.05 mm to 0.1 mm. On a top 16 of the hob plate 13, a finger can be placed for the above-mentioned operating function with a capacitive sensor element. Furthermore, at the top 16 of the hob plate 13, the light indicator, as shown in particular with reference to Fig. 3 well imaginable, be recognized.

A display device 18 under the cooktop plate 13 or which rests on the underside 14 with the nubs 15 has a plurality of display elements 20, wherein only one is shown here. The display element 20 is substantially block-shaped and has a display housing 22, as is basically known from the prior art. Within the display housing 22, a Lichtleitkanal 24 is formed of translucent material, advantageously completely transparent polycarbonate. The light guide channel 24 as a component has a bottom 25 and a top 26. At the bottom 25, a free space 27 is formed for arranging a light source 40 underneath. In the sectional view of Fig. 1 Left and right, a reflector 28 is integrally formed on the light guide 24 or at its obliquely downwardly and outwardly facing sides. The reflector 28 is made of opaque material, advantageously also polycarbonate, and may be particularly advantageous in an aforementioned multiple-injection process with the Lichtleitkanal 24 is injected together. The interfaces between the two forms a light-reflecting surface to reflect as much light up to the top 26 back. The reflector 28 runs, as the other Sectional view of Fig. 2 shows, along the longer outer sides and laterally along the Lichtleitkanal 24 along, but only up to a certain height, as already from the Fig. 1 can be seen. Along these longer outer sides, part of the reflector 28 is exposed to the outside, which is not a problem.

The in the Fig. 1 Cut outer walls 30a and 30c shown are made of a third material, namely electrically conductive material. This is advantageously an aforementioned electrically conductive polycarbonate, which is opaque and thus as well as the reflector 28 terminates the light guide 24 to the side. So no unwanted luminous phenomena can occur. The left outer wall 30a extends up to an upper side 26 of the light guide channel 24 and forms one there Fig. 3 recognizable in plan view circumferential edge. Attached to this edge is a spacer 32a. As the illustrations show well, the spacer 32a is both slightly offset inwardly from the outside of the outer wall 30a and slightly recessed from the transition to the upper surface 26 of the light guide channel 24. *** " This also applies to the spacers 32b to 32d of the remaining outer walls 30b to 30d. Like the sectional view of the Fig. 2 shows well, along the longer outer sides of the display housing 22, the outer wall 30 b and 30 d is not particularly high, and in particular placed on an upper edge of the reflector 28. For a better connection of the two areas, a stepped contour can be provided here.

The material of the outer walls 30a to 30d and the spacers 32a to 32d is made electrically conductive in the aforementioned manner, advantageously by the addition of short carbon fibers, carbon black or graphite. As a result, it forms a frame-like circumferential capacitive sensor element, which in the Fig. 3 can be seen in plan view. It corresponds in its function approximately to the capacitive sensor element, as it is known from the above EP 2809006 A1 is known. However, it consists here of a non-elastic material, advantageously again polycarbonate, and is non-elastic. Its deformability, which, however, is accompanied only by destruction, is not considered in the context of the invention as a non-elastic property. Also, the apparent thin material thickness or width b of the spacers 32a to 32d with about 0.2 mm to 0.3 mm gives them no elasticity.

Like from the Fig. 1 and 2 can be clearly seen, stand the spacers 32a to 32d with the height h on the top 26 of the Lichtleitkanals 24 and protect it thus. Since the spacers 32a to 32d are higher than the nubs 15 on the underside 14 of the hob plate 13, for example by at least 0.05 mm and because of their non-elastic construction, they thus protect this top 26th

On the upper side 26 or on the entire upper portion of the display element 20 and thus also on the spacers 32 and at least the upper portions of the outer walls 30a to 30d an aforementioned opaque coating 42 is applied, which only in the Fig. 3 is shown directly, but for the skilled person is easy to imagine. This coating 42 is opaque to the light from a light source 40 having the intensity of light commonly used for such display devices 18. The coating 42 may have a low thickness of less than 0.1 mm, it just has to be opaque to light. It may be a kind of paint or elastic coating which has been permanently applied to the display housing 22 and especially the top 26. Then, in the coating 42 at the top 26, a cutout 43 in symbol form, here as "F", are introduced, advantageously by means of laser. It can also be made several sections, which is not a problem by laser. At this cutout 43, therefore, light in its form can emerge from the light guide channel 24 for the aforementioned luminous display function and can be seen from above through the hob plate 13 as a luminous "F". Here is well conceivable, as in a direct concern of this top 26 with the coating 42 on the knobs 15 of the bottom 14 of the hob plate 13 damage to the coating 42 is possible and likely, which then undesirably in undesirable places leaks light. For just the aforementioned spacers 32a are provided to 32d.

The small lateral distance a of the spacers 32a to 32d to the boundary between the upper side 26 and outer wall 30a to 30d, which is mainly in the plan view of Fig. 3 and the sectional views of the Fig. 1 and 2 is clear, serves to ensure that at the top of the spacer, the coating 42 is likely to be at least partially scraped by the nubs 15. Dissolves the coating 42 then in slightly larger pieces, so is still the inner edge at the foot of the spacers 32a to 32d present, where the coating 42 settles in a slightly greater material thickness and thus does not dissolve so easily. Due to the distance a to the top 26 above the light guide 24 a backup of the whereabouts of the coating 42 is ensured on this top.

In order to enable electrical contacting of the capacitive sensor elements formed by the spacers 32a to 32d down, the short lateral outer walls 30a and 30c down into retaining members 34a and 34b over. These are electrically conductive because the entire continuous material is electrically conductive, advantageously the above-mentioned electrically conductive and opaque polycarbonate. As the Fig. 1 easily and also known from the prior art, the holding members 34a and 34b in holes 37a and 37b of a component carrier 36 of the display device 18 are inserted and pressed, so hold non-positively, under certain circumstances also by a small deformation. The inner sides of the holes 37a and 37b are electrically conductive coated, advantageously as so-called vias, as they are known from printed circuit board technology and also in the component carrier 36, which is advantageously a common circuit board, can be easily provided. Of the holes 37a and 37b and their electrical contacting conventional traces can go to a control of the display device, which is not shown here. Similar printed conductors also contact an LED 40 as a light source in the free space 27 under the underside 25 of the light guide channel 24. From the sectional view of Fig. 1 and 2 It can also be seen that the display housing 22 goes around the LED 40 up to the component carrier 36 and thus prevents light emission to the outside. This is done by the LED 40 surrounding reflector 28, which is pulled up to the component carrier 36 down.

From the Fig. 6 can be seen how schematically the representation of the quasi Fig. 4 Accordingly, not only a single LED 40 may be provided, but two LED 40. It could even four LED 40 may be provided. It is with the Fig. 6 possible that two or even more colors are provided by differently colored LED for a more variable light display.

The innovation of the present invention thus consists essentially of the provision of the spacers 32a to 32d, which rotate around the top 26 of the Lichtleitkanals 24 and these project upwards and serve as protection. They are non-elastic designed to ensure the protection of the top 26 and the coating 42 thereon. Furthermore, they are electrically conductive and act as capacitive sensor elements for an operating function of the display device 18. Their electrical contact is made via down drawn areas as lateral outer walls 30a and 30c, which pass into holding members 34a and 34b, which in turn are electrically contacted. A plurality of such display elements 20, possibly also with different basic shapes, can according to the above-mentioned DE 102009049559 A1 be provided on the component carrier 36 and form a display device 18, which also works as a control device with capacitive touch sensors.

Claims (15)

Display element for a display device (18), wherein the display element (20) has a luminous display function and an operating function, wherein the display element for the luminous display function comprises: a display housing (22), - A light guide channel (24) in the display housing (22) which extends continuously from a bottom (25) to an upper side (26) of the display housing, - Wherein the Lichtleitkanal (24) is opaque to the side, on the upper side (26) of the display housing (22) an opaque coating (42) is applied to the light guide channel (24), - At least on two outer sides of the display housing (22) non-elastic spacers (32a-d) are provided, which project beyond the top (26) of the Lichtleitkanals (24) and are higher and which consist of electrically conductive material for the operating function to to form a capacitive sensor element at the top of the display element (20) for a capacitive operating sensor. Display element according to claim 1, characterized in that the Lichtleitkanal (24) to the side of opaque plastic (28, 30a-d) is surrounded, preferably completely surrounded, wherein a bottom (25) of the Lichtleitkanals (24) is released for a light entry from a light source (40) underneath, and an upper side (26) of the light guide channel (24) has an opaque coating (42), wherein in the opaque coating at least a cutout (43) is provided in the form of a symbol or symbols for the luminous display function , Display element according to claim 1 or 2, characterized in that the spacers (32a-d) are provided at least on opposite sides of the display housing (22) and preferably each extend over the full width of this page, in particular the spacers (32a-d) on all sides completely circumferentially on the display housing (22) are formed and frame the top (26) of the Lichtleitkanals (24). Display element according to claim 3, characterized in that a spacer (32a-d) on a lateral outer wall (30a-d) of the display housing (22) is provided, which is made of opaque material and the Lichtleitkanal (24) on the outside encloses or forms an outer side of the display housing (22), wherein preferably all spacers are provided on circumferential outer walls. Display element according to one of the preceding claims, characterized in that at least in a lower region of the Lichtleitkanals (24) the Lichtleitkanal at least partially laterally outwardly and / or downwardly limiting reflector (28) is provided, which consists of opaque material, preferably the reflector on short outer sides (30a, 30c) of the display housing (22) of the material of the spacers (32a, 32c) is covered and especially on long outer sides (30b, 30d) of the display housing (22) laterally outside uncovered. Display element according to one of the preceding claims, characterized in that on opposite outer sides (30a-d) of the display housing (22) each projecting downwardly and over a bottom (25) of the Lichtleitkanals (24) downwardly projecting holding member (34a, 34b) is provided. Display element according to one of the preceding claims, characterized in that the opaque coating (42) on the upper side (26) of the Lichtleitkanals (24) applied to all lateral outer sides (30a-d) and the other top (26) of the display housing (22) is, in particular on the spacers (34a-d). Display element according to one of the preceding claims, characterized in that the Lichtleitkanal (24) is surrounded in its upper region by opaque material (30a-d), which forms a peripheral edge, wherein preferably the peripheral edge of a plane plane with the upper side (26 ) of the light guide channel (24). Display element according to claim 8, characterized in that on this edge at least partially the spacers (32a-d) are placed, preferably wherein the spacers (32a-d) 5% to 50% of the width of the edge of the boundary between edge and Lichtleitkanal ( 24) are spaced offset outwards. Display element according to one of the preceding claims, characterized in that the electrically conductive spacers (32a-d) by means of electrically conductive material down to be electrically contacted as electrical connection to the capacitive sensor element. Display element according to claim 10, characterized in that the electrically conductive material of the spacers (32a-d) on the outer sides (30a-d) of the display housing (22) integrally into the holding members (34a, 34b) passes according to claim 6 for producing an electrical Contact during attachment of the display element (20) with the holding members (34a, 34b) on a component carrier (36), wherein the holding members are inserted into corresponding holes (37a, 37b) in the component carrier. Display device (18) for arrangement in an electrical appliance (11), characterized by a component carrier (36) with electrical functional units (40) thereon and at least one display element (20) according to one of the preceding claims thereon. Display device according to claim 12, characterized in that the light source (40) for the light display function on the component carrier (36) below the light channel (24) of the display element (20) is arranged, wherein preferably a plurality of LED (40) below the light channel (24). a single display element (20) are arranged. Display device according to claim 12 or 13, characterized in that an electrical contact to a display element (20) according to claim 10 or 11 via an electrically conductive hole (37a, 37b) in the component carrier (36), in which the holding member (34a, 34b ) is inserted according to claim 6. Electric appliance, in particular hob (11), with a display panel (13) or cover, characterized in that below the display panel (13) or cover a display device (18) according to one of claims 12 to 14 is arranged, wherein preferably the display device on a bottom (14) of the display panel (13) or cover is applied.

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