WO2020038769A1 - User interface for a control device of a hob system - Google Patents

Abstract

The invention relates to a user interface (10) for a control device (4) of a hob system, comprising multiple lamps (12), at least one touch-sensitive sensor (13), a display mask (21) having multiple translucent display areas (14), an opaque masking element (31) which delimits the multiple display areas (14), and an integrally formed light guide body (20) for guiding light between the multiple lamps (12) and the multiple display areas (14), wherein at least two of the display areas (14) connected to the integrally formed light guide body (20) can be illuminated independently of one another, and a sensing region of the at least one touch-sensitive sensor (13) overlaps at least one of the multiple display areas (14) when viewed from above.

Description

 User interface for a control device of a cooktop system

This patent application claims priority from German patent application DE 10 2018 214 146.0, the content of which is incorporated herein by reference.

The invention relates to a user interface for a control device of a cooktop system. The invention further relates to a glass cover for a control device of a cooktop system and a corresponding control device for a cooktop system and a cooktop system.

A user interface for a control device of a cooktop system is known, for example, from DE 10 2016 205911 A1. Such a user interface can have a touch-sensitive sensor for capturing user inputs and a screen for visual information output.

It is an object of the invention to improve a user interface for a control device of a cooktop system.

This object is solved by the features of claim 1. The essence of the invention is to design the user interface with the plurality of illuminants, the at least one touch-sensitive sensor, the display mask and the integrally formed light guide body such that at least two of the display surfaces connected to the integrally formed light guide body can be illuminated independently of one another and that a detection area of the at least one touch-sensitive sensor overlaps at least one of the display areas in a plan view. It is advantageously achieved by the one-piece design of the light guide body that the user interface can be embodied in a particularly compact manner, in particular a very dense arrangement of independently illuminable display areas can be achieved in a small installation space. The arrangement of the at least one touch-sensitive sensor in such a way that it overlaps at least one of the several display surfaces in the top view allows the user interface to be operated particularly intuitively. In particular, additional markings for identifying these detection areas can be dispensed with, which in turn makes the user interface special is compact and with which a particularly appealing design of the user interface can be achieved.

The user interface is preferably designed to ensure a context-sensitive representation of functions. This is to be understood to mean that the user interface can display different, in particular hierarchically structured, operating menus, depending on the activated operating context. The context-sensitive representation of functions can also enable different user inputs to be made, in particular different functions of the hob system, by actuating a certain touch-sensitive sensor, depending on the context presented. The context-sensitive representation of functions is discussed in detail in connection with the description of the control device.

The top view is to be understood as a direction of view oriented perpendicular to the plurality of display areas. The display surfaces can be round, in particular circular and / or polygonal, in particular rectangular, in particular square. According to a preferred embodiment, the display areas are designed in the form of symbols. In example, a display area designed as a symbol can be designed in the form of an hourglass and / or in the form of a padlock and / or in the form of a switch-on symbol. The design of the several display areas in the form of symbols makes the user interface le particularly easy to use.

Particularly preferably, at least one of the display areas is designed in the form of a hotplate symbol. Furthermore, at least one of the display surfaces can be designed in the form of an extractor symbol, in particular in the form of a fan symbol. The user interface thus ensures intuitive operation of a cooktop system with at least one hotplate and at least one extractor device.

The illuminants are preferably designed as light-emitting diodes (LEDs). The user interface preferably comprises at least 10, in particular at least 25, in particular at least 50, in particular at least 100, preferably independently switchable, in particular white, illuminants. At least one is preferred, in particular are at least 3, in particular at least 5, in particular at least 10, of the illuminants designed to emit red and / or green and / or blue light. The lamps are preferably spaced apart, in particular on a lamp board. The lamps can be freely positioned in relation to each other on this field. A distance between two of the illuminants is preferably at least 0.1 mm, in particular at least 0.25 mm, in particular at least 0.5 mm, in particular at least 1 mm, in particular at least 2 mm. A distance between two illuminants, which are designed in particular for illuminating different display surfaces, is preferably at least 0.5 mm, in particular at least 1 mm, in particular at least 2 mm. It is hereby advantageously achieved that the display areas can be illuminated independently of one another, without interfering influences from adjacent lamps. The use of individual illuminants allows the display surfaces to be arranged in a particularly flexible manner. The combination of the illuminants with the display mask ensures that the display surfaces are displayed with a particularly clear contour, while at the same time achieving a high level of illumination intensity. In particular, the display areas, in particular the symbols, can be displayed more intensely and with more contours than with known LCD displays.

The touch-sensitive sensors can be designed as capacitive and / or inductive and / or heat-sensitive and / or pressure-sensitive sensors and / or as distance sensors. The user interface preferably comprises at least 5, in particular at least 10, in particular at least 20, in particular at least 50 touch-sensitive sensors. According to one aspect of the invention, the respective detection area of at least 5, in particular at least 10, in particular at least 20, in particular at least 50, of the touch-sensitive sensors overlaps at least one of the display areas in the top view.

According to one aspect of the invention, the light guide body has a light guide base body and a light guide cover. At least one base body cutout, in particular at least one base body cutout per independently illuminable display area, in particular per display area, preferably penetrates the light guide base body. The light guide cover preferably penetrates at least one cover recess, in particular at least one cover recess per independently illuminable display surface, in particular per display surface. che. The at least one cover recess and / or the at least one base body recess can be designed as a material-free recess or as a translucent body. The cover cutouts can overlap the base body cutouts in a plan view. The user interface preferably comprises a diffuser layer for particularly uniformly emitting the light emitted by the plurality of illuminants. The diffuser layer is preferably arranged between the light guide body and the masking element. The diffuser layer can be formed in one piece with the masking element and / or the light guide body, in particular in the form of a coating. Alternatively, the diffuser layer can be designed as a separate film. The diffuser layer preferably overlaps the cover recesses and the base body recesses. The light guide base body and / or the diffuser layer can consist of a, in particular white, plastic. The light guide cover is preferably designed to be opaque.

According to one aspect of the invention, the user interface has a user interface control unit, which is signal-connected to the plurality of illuminants and the at least one touch-sensitive sensor, for switching the plurality of illuminants and / or for evaluating measurement signals of the at least one touch-sensitive sensor.

The illuminants and / or the user interface control unit are preferably designed to ensure a variable illumination intensity. It is advantageous in this way that the display areas can be illuminated at different brightnesses. In this way, for example, active and inactive areas of the user interface can be visually distinguished in a simple manner. The lighting of the display surfaces can be adjustable according to the ambient lighting.

According to a further aspect of the invention, the user interface has an acoustic signal generator. The acoustic signal generator can be in signal connection with the user interface control unit.

According to one aspect of the invention, the touch-sensitive sensors and / or the user interface control unit are designed such that at least 2, in particular at least 3, in particular at least 4, user inputs can be detected simultaneously. The Touch-sensitive sensors and / or the user interface control unit can also be designed such that only one user information can be recorded at the same time.

The illuminants can comprise single-color illuminants, in particular white, in particular blue, in particular green, in particular yellow, in particular orange, in particular red, illuminants, and / or multicolored illuminants, in particular RGB illuminants. As a result, the user can be provided with a large amount of information in a small space.

According to a further aspect of the invention, the display mask, the light guide body and the at least one touch-sensitive sensor are integrally connected to one another, in particular glued together. The user interface can thus be designed to be particularly robust. In particular, a response behavior of the touch-sensitive sensor can be improved.

According to a further aspect of the invention, at least 10, in particular at least 20, in particular at least 50, in particular at least 100, in particular at least 150, in particular at least 200, of the illuminants are arranged in the plan view within a coherent area of at most 10 cm ² . Preferably, at least 10, in particular at least 25, in particular at least 50, in particular at least 100, display surfaces which can be illuminated independently of one another are arranged within a display field which has an area of at most 10 cm ² . The display field is to be understood as that surface which is enclosed by a smallest convex envelope of the display surfaces which can be illuminated independently of one another.

According to a further aspect of the invention, the at least one touch-sensitive sensor is designed as a sensor film. All of the touch-sensitive sensors are preferably designed as sensor foils, in particular connected to one another in one piece. The sensor film is preferably largely transparent, in particular with a light transmission factor of at least 70%, in particular at least 90%.

According to a further aspect of the invention, the user interface has at least 10, in particular at least 20, in particular at least 50, touch-sensitive sensors. The detection areas of the touch-sensitive sensors preferably do not overlap one another, in particular they are arranged at a distance from one another. The sensors sensitive to touch can preferably be read independently of one another.

According to a further aspect of the invention, the at least one touch-sensitive sensor, in particular in the light guide direction, is arranged between the plurality of illuminants and the display mask. The at least one touch-sensitive sensor can also be arranged on a side of the display mask opposite the plurality of illuminants. The at least one touch-sensitive sensor is preferably arranged between the light guide body and the display mask. A disruptive influence of the touch-sensitive sensor on the illumination of the at least one display surface can thus be reduced, in particular prevented.

According to a further aspect of the invention, the user interface has at least one temperature sensor. The user interface control unit is preferably designed to read out the at least one temperature sensor. The user interface control unit can be designed to compare a temperature value detected by means of the at least one temperature sensor with a temperature threshold value. The temperature threshold is preferably determined by the temperature resistance of the user interface and / or the control device and / or a glass cover of the user interface. The user interface control unit is preferably designed to output a warning signal if the detected temperature value exceeds the temperature threshold value.

According to a further aspect of the invention, the user interface has at least one coverage sensor. The at least one overlap sensor is preferably formed in one piece with the sensor film, in particular integrated into the sensor film. A measurement value correlating with a correct assembly of the user interface and / or with a correct arrangement of the user interface on the glass cover can be detected by means of the at least one coverage sensor. This advantageously achieves that the at least one touch-sensitive sensor is arranged in sufficient proximity to the glass cover and / or that a heat-conducting connection, in particular an adhesive connection tion between the at least one temperature sensor and the structure arranged thereon, in particular the glass cover, is reliably produced.

According to a further aspect of the invention, the light-guiding body is penetrated at least partially, in particular in the form of a blind hole or completely, by the at least one base body cutout, in particular in the direction of a display surface. The at least one base body recess can be designed as a light-conducting channel. The base body preferably has a largely reflective channel wall compared to the base body cutout designed as a light-conducting channel. The light guide can thus be particularly low loss and thus energy efficient. The at least one base body recess can extend along a straight or curved light guide path. The light can thus be carried out, in particular geometrically, particularly flexibly and / or in a space-saving manner.

The light guide body is preferably produced in an injection molding process. The Lichtleitkör by can be integrally formed. Alternatively, the light guide body can be formed in several parts. In particular, the light guide base body and the light guide cover can be formed separately from one another.

 The light guide body and the lamp board are preferably designed as separate components. Preferably, the light guide body and the lamp board are reversibly detachable from one another. For this purpose, the light guide body and the lamp board can be connected to one another in a force-locking and / or positive and / or detachable manner. The Lichtleitkör by is preferably not molded onto the lamp board, in particular molded niche injection molding. Due to the separate design of the light guide body from the lamp board, a particularly high dimensional accuracy of the light guide body, in particular of light-guiding channels, can be ensured.

The light guide body can alternatively also be injection molded onto the lamp board. The light guide body can be connected to the lamp board in a form-fitting manner by at least in sections overmolding the lamp board.

According to a further aspect of the invention, at least one of the illuminants projects into the at least one base body recess. The light guide body preferably overlaps this at least one lamp in a direction perpendicular to a main emission direction of the respective lamp. This allows a particularly compact arrangement of the Lichtleitkör pers and the lamp board can be achieved. The light is preferably generated completely within the at least one base body recess, in particular within a smallest convex envelope of the respective base body recess, or within a smallest convex envelope of the light guide body. As a result, the light conduction can take place with little loss.

Another object of the invention is to improve a glass cover for a control device of a cooktop system.

This object is achieved by a glass cover with the features of claim 8. It is essential that the glass cover has a glass pane with a glass underside on which an opaque barrier coating with at least two translucent coating recesses is applied, a tinted coating being applied in the area of the at least two coating recesses and the glass cover being in the area of the at least two coating recesses has a light transmittance of at most 25%. This advantageously achieves that the glass cover in the area of the coating recesses is designed to be transparent to light, the coating recesses being viewed from the top of the glass cover, in particular with weak, in particular with deactivated, backlighting, optically hardly, in particular not at all, distinguish it from the opaque barrier coating. This creates the impression of a continuous, in particular deep black, cover. In particular, the glass cover according to the invention has a dead front effect. The glass cover thus ensures a particularly appealing overall appearance.

The glass pane preferably comprises an inorganic material, in particular a glass, in particular a glass ceramic and / or a plastic, in particular plexiglass. The glass pane preferably has thermally and / or chemically hardened glass. The glass pane can consist of a single pane safety glass. A glass wall thickness of the glass pane is preferably at most 7.5 mm, in particular at most 5 mm, in particular at most 3 mm. The Speix coating and / or the tint coating are preferably formed from a dark material, in particular from a dark gray and / or black material. The barrier coating and / or the tint coating can have a ceramic material and / or a plastic material. The barrier coating and / or the tint coating are preferably applied to the underside of the glass in a ceramic printing process and / or a glaze printing process. The ceramic coating and / or the glaze coating can have a deep black color, in particular the color RAL9ÖÖ5. Preferably, in a hardening and baking process, on the one hand the ceramic coating is firmly connected to the glass pane and on the other hand the glass pane is thermally and / or chemically hardened.

The light transmittance of the glass cover in the area of the at least two coating recesses is preferably at most 20%, in particular at most 15%, in particular at most 10%, in particular at most 5%.

According to a further aspect of the invention, the glass pane has a tint which limits a light transmittance of the glass pane to at most 60%, in particular at most 50%, in particular at most 40%. For this purpose, the glass pane is preferably made of gray glass. The tint is to be understood as a, in particular uniform, coloring of the glass pane across the glass wall thickness. The tint preferably has a dark, in particular gray or black, shade. The glass cover can thus be made optically particularly appealing. The glass cover, in particular the glass pane, is preferably designed as a transparent glass ceramic plate.

The lamps of the user interface preferably have a light intensity of at least lo cd, in particular at least ISO cd, in particular at least 200 cd, in particular at least 250 cd. In this way, it is advantageously achieved that the glass cover in the region of the at least two coating recesses is reliably and clearly perceptible.

According to a further aspect of the invention, at least one cut-in is arranged on a glass upper side of the glass pane. The EinschlifF can be a, in particular sack-shaped, depression be trained. In a top view, the ground joint is preferably round, in particular circular or oval, or polygonal, in particular rectangular, in particular square. The ground joint can be designed as a spherical segment-shaped and / or slot-shaped and / or ring-shaped recess. Other shapes are also conceivable. Such a cut advantageously ensures an intuitive, haptic orientation on the glass cover, which in particular facilitates the operation of a user interface arranged under the glass cover.

Another object of the invention is to improve a control device for a cooktop system.

This object is achieved by a control device with the features of claim 11. The advantages of the control device according to the invention correspond to the advantages of the user interface already described. It is essential that the control device has at least one interface for connecting a cooktop and at least one interface for connecting an extractor device for extracting cooking fumes downward and at least one user interface as described above.

According to one aspect of the invention, the at least one interface for connecting the cooktop is designed such that different cooktops, in particular cooktops with different energy transfer principles, in particular radiation cooktops and / or induction cooktops and / or teppan-yaki cooktops and / or gas cooktops, can be connected to it are. The interfaces for connecting the hob and for connecting the extractor device can be identical. According to one aspect of the invention, the devices connected to the respective interface are identified on the software side. The signal connection between the control device and the components connected to it, in particular the hob connected to it and / or the extractor device, is preferably carried out via a LIN bus. For example, the different components for automated detection can be coded on the software and / or hardware side, in particular by means of DIP switches. Alternatively, at least two of the interfaces, in particular their connections, have a geometric shape coding, in particular according to the Pokayoke principle. A faulty connection of the respective component to an interface and thus a problem Damage to the control device or to components connected to it can thus be reliably prevented.

According to one aspect of the invention, the control device is designed for its automatic configuration on the basis of the components connected to it. For example, an output signal transmitted via the respective interface can be adapted in accordance with the component connected to the respective interface. The user interface, in particular the illuminants and / or the touch-sensitive sensors, can be switched, in particular activated or deactivated, using the component connected to the respective interface.

According to one aspect of the invention, the control device and / or the user interface, in particular for the context-sensitive display of functions, are designed to display different, in particular hierarchically structured, operating menus. These operating menus can include an initialization menu and / or a main menu and / or a timer menu for time control of connected components and / or a cooktop control menu and / or an extractor control menu and / or a maintenance menu and / or an error menu. Operating menus of this type can differ in the number and / or the position and / or the illuminance and / or the color of the illuminated display areas. The control device can be designed such that actuation of the at least one touch-sensitive sensor in different operating menus enables the control of different functions. User input is preferably only possible via those touch-sensitive sensors which overlap at least one of the, in particular strongly, illuminated display areas.

According to one aspect of the invention, the control device is designed to recognize initial start-up, in particular first-time energization. The control device and / or the user interface can be designed to display the initialization menu when starting up for the first time and / or to ensure the automatic detection of the components connected to it. The control device can be designed for this, in particular for context-sensitive representation of functions, in particular in the frame the initialization to adapt at least one of the operating menus according to the components connected to the control device.

According to one aspect of the invention, the control device has at least one additional interface for connecting additional hob components. These additional cooktop components can include a filter insert sensor for detecting the correct arrangement of a filter in the cooktop system, a fume hood sensor for detecting the arrangement of a fume hood in the area of the cooking vapor inlet opening, a hotplate temperature sensor for detecting a temperature of the food carrier in Area of the respective hotplates and a pan detection sensor for detecting a pot arranged on the respective hotplate.

According to a further aspect of the invention, the control device has a glass cover as described above. The advantages of the control device according to the invention with the glass cover correspond to the advantages of the glass cover described above. According to one aspect of the invention, the control device has a housing which surrounds the user interface together with the glass cover in a liquid-tight, in particular fluid-tight, manner. The control device, in particular the user interface, is thus particularly reliably protected against external influences and is particularly robust.

According to one aspect of the invention, the housing comprises a carrier frame. The Trägerrah men can be integrally ausgebil det with a vacuum channel approach of the extractor device. Preferably, the glass cover has a Kochdun stone entry opening penetrating the glass pane. The control device, in particular the user interface, is preferably formed integrally with a cooking vapor entry area of the extractor device. The hob system can thus be designed to be particularly compact and visually appealing.

According to a further aspect of the invention, a distance between the glass cover and the user interface is less than 2 mm, in particular less than 1 mm, in particular less than 0.5 mm, in particular less than 0.1 mm. The glass cover is preferably in direct contact with the user interface. The glass cover can be glued to the user interface. An insulation gap to avoid heat transfer from the Glass cover on the user interface can be avoided by the above-described structure of the control device, in particular the user interface. The reduced distance between the at least one touch-sensitive sensor and the surface of the glass cover allows user inputs to be recorded particularly sensitively and reliably.

The invention is also based on the object of improving a hob system.

This object is achieved by a hob system with the features of claim 14. The advantages of the cooktop system according to the invention correspond to the advantages of the user interface already described, the glass cover and the control device.

According to a further aspect of the invention, the glass cover can at least partially, in particular completely, surround a cooking vapor inlet opening of the extractor device. The glass cover can be formed in one piece with a food support of the at least one hob. The hob system, in particular the cookware support, can have a continuous glass surface, the glass cover, in particular a transparent glass ceramic cover, being integrally connected to this glass surface. The cookware holder can also have a stainless steel plate. In particular, the cookware carrier can have a combination of a glass ceramic plate and metallic components, in particular a metallic cast carrier unit and / or a stainless steel plate. The cooktop system is preferably designed as an assembly unit. Such a hob system can be installed in a kitchen worktop in a particularly simple, quick and cost-effective manner.

Further features, advantages and details of the invention result from the following description of an exemplary embodiment:

1 is a perspective view of a cooktop system attached to a kitchen worktop of a kitchen base cabinet with two cooktops, an extractor device for extracting cooking fumes downwards and a control device, 2 is a plan view of the control device in FIG. 1,

3 is an exploded perspective view of the control device in FIG. 1 with a housing, a user interface and a glass cover,

4 shows a plan view of a lamp board of the user interface in FIG. 3 with a plurality of lamps,

5 shows a bottom view under a light guide body of the user interface in lig. 3,

6 shows a plan view of the light guide body in Lig. 5,

7 shows a plan view of a display mask of the user interface in Lig. 3 with a plurality of translucent display surfaces and an opaque masking element,

Lig. 8 is a bottom view under a touch sensor of the user

 interface in Lig. 3 with several detection areas,

Lig. 9 is a bottom view under the glass cover in Lig. 3 with a barrier coating and a tint coating and

Lig. 10 is a schematic representation of the hob system in Lig. 1 with a Steuerein direction for controlling the hob system.

The basic structure of a cooktop system 1 is shown in Lig. 1. The cooktop system 1 comprises two cooktops 2 for heating cookware, an extractor device 3 for extracting cooking fumes downwards and a control device 4 for controlling the cooktop system 1. Each of the cooktops 2 comprises two hotplates 5, in the area of which the cookware can be heated , Each of the hobs 2 comprises a cookware carrier 6 for carrying the cookware. The food support 6 is designed as a glass-ceramic plate. In the area of the cooking area 5, the cooktops 2 each have an energy transmitter (not shown) below the Cookware carrier 6. The energy transmitters are designed as induction coils. The respective hotplate 5 is designed accordingly as an induction hotplate.

The extractor device 3 has a cooking vapor inlet opening 7. An inflow grille 8 is arranged in the area of the cooking vapor inlet opening 7 for laminarizing the incoming cooking fumes and for covering the cooking vapor inlet opening 7. The Kochdunstein opening 7 is surrounded by a frame member 9. The frame element 9 comprises a hardened glass material.

The control device 4 has a user interface 10 and a glass cover 11. The user interface 10 comprises a plurality of lamps 12 for outputting optical signals and a number of touch-sensitive sensors 13 for recording user inputs. The

Illuminants 12 are designed as LEDs. The touch-sensitive sensors 13 are formed as capacitive film sensors and are connected to one another in one piece. The glass cover 11 is formed in one piece with the frame element 9. The touch-sensitive sensors 13 each overlap the lamps 12 in a plan view.

2, the control device 4 is shown in further detail. In particular, FIG. 2 shows several display areas 14 of the user interface 10, which can be illuminated by means of the illuminants 12. Some of the display areas 14 are designed and arranged as display areas 14a for forming a seven-segment display. Further of the display surfaces 14 are in the form of symbols, in particular in the form of an hourglass 14b and in the form of a padlock 14c.

The display areas 14 are arranged within a display field 15. The display field 15 is understood to mean the area within a smallest convex envelope in which all of the display areas 14 are arranged. A display panel width XB of the display panel 15 is 70 mm and a display panel depth y _{B of} the display panel 15 is 125 mm.

The touch-sensitive sensors 13 each have a detection area 16. 2 shows, by way of example, the arrangement of three of the touch-sensitive sensors 13 covered by the glass cover 11 by marking their associated detection areas 16. provides. The detection area 16 of each of the touch-sensitive sensors 13 shown overlaps one of the plurality of display areas 14 in the plan view.

The glass cover 11 has two cuts l7a, l7b. The cuts l7a, l7b are designed as blind-hole-shaped cutouts. The rear grind l7a is designed as a recess in the form of a spherical segment. The front grind l7b is shaped in the form of a straight, rounded groove.

3, the control device 4 is shown in detail in the form of an exploded view. The further components of the user interface 10 shown in FIG. 3 comprise a user interface control unit 18 for switching the plurality of lamps 12 and for evaluating measurement signals from the at least one touch-sensitive sensor 13, a lamp board 19 for carrying the lamps 12 and for providing one Signal connection between the illuminants 12 and the user interface control unit 18, a light guide 20 for guiding light from the plurality of illuminants 12 to the multiple display surfaces 14 along an illumination direction 20a, a display mask 21 and the touch-sensitive sensors 13. The user interfaces Control unit 18 is arranged on the lamp board 19. A hob system control unit 22 for controlling the hob 2 and the extractor device 3 is also connected to the lamp board 19 and is in signal connection with the user interface control unit 18.

152 of the illuminants 12 are arranged on the illuminant board 19, and the light guide body 20, the display mask 21, the touch-sensitive sensors 13 and the glass cover 11 are arranged in this order above the illuminant board 19.

The control device 4 further comprises a support frame 23, which is made in one piece with a vacuum channel extension 24 for forming the cooking vapor inlet opening 7. A housing 25 of the control device 4 is attached to the support frame 23. The user interface 10 and the cooktop system control unit 22 are surrounded by the vacuum channel attachment 24, the housing 25, the cable set 26 and the glass cover 11 in a waterproof, in particular fluid-tight, manner. The control device 4 is in signal connection with the cooktops 2 and with the extractor device 3 by means of the control lines 26. An upper side of the lamp board 19 is shown in detail in FIG. 4. The illuminants 12 are designed as single-color, in particular white, LEDs l2a and in the form of multicolor LEDs l2b, in particular in the form of RGB LEDs. The user interface 10, in particular the lamp board 19, has temperature sensors 33 for recording measured values which correlate with a temperature of the glass cover 11.

5 and 6, the light guide body 20 is shown in further detail. The Lichtleitkör by 20 comprises a Lichtleitgrundkörper 27 and an opaque light-tight cover 28 attached to an upper side of the Lichtleitgrundkör pers 28. The Lichtleitgrundkörper 27 consists of a white plastic material. In the area of the illuminants 12, the light guide base body 27 has base body cutouts 29 penetrating it. The light guide cover 28 delimits a plurality of cover recesses 30 which overlap the base body recesses 29 in a plan view.

The light guide body 20 has a diffuser layer 30a. The diffuser layer 30a is arranged on an underside of the display mask 2 and overlaps all of the cover recesses 30 in a plan view.

7, the display mask 21 is shown in further detail. The translucent display surfaces 14 are surrounded by a masking element 31. The masking element 31 is formed in one piece. Each of the display areas 14 is delimited by the opaque masking element 31 in plan view.

The touch-sensitive sensors 13 are further shown in detail in FIG. 8. All of the touch-sensitive sensors 13 are integrally connected to one another and designed in the form of a single sensor film 32. The sensor film 32 includes overlap sensors 33a, which are designed to detect a direct arrangement of the sensor film 32 on the glass cover 11. The sensor film 32, in particular the touch-sensitive sensors 13 and the overlap sensors 33 a, is in signal connection with the user interface control unit 18 via a sensor connection 34. An underside of the glass cover 11 is further shown in detail in FIG. 9. The glass cover 11 has a glass pane 35 with a glass underside 36a and a glass top 36b. An opaque barrier coating 37 is applied to the glass underside 36a. The barrier coating 37 surrounds a plurality of coating recesses 38. The coating recesses 38 overlap the display surfaces 14 in a plan view. In the region of the coating recesses 38, the glass cover 11 has a tint coating 39. The tint coating 39 has a light transmittance of about 30%. The cuts l7a, l7b are introduced into the glass top 36b of the glass pane 35.

The glass pane 35 comprises a thermally hardened glass. The glass pane 35 has a light transmittance of approximately 50%. In the area of the coating recesses 38, the glass cover 11 has a total light transmittance of approximately 10%. In the area of the barrier coating 37, the glass cover 11 is opaque to light.

The hob system 1 is shown schematically in FIG. 10. 10, the connection of the cooktops 2 and the extractor device 3 to the control device 4 is explained. The control device 4 has a multiplicity of interfaces 40. By means of control lines 41, the hob 2 and extractor device 3 are connected to the interfaces 40. The control device 4 also has interfaces 40 for connecting further hob components 42, in particular fume cupboard components. Such hob components 42 may include further sensors, in particular external temperature sensors, and / or actuators, in particular an actuator for actuating a cover for the cooking vapor inlet opening 7. Each of the interfaces 40 is designed such that both the cooking fields 2, in particular with any energy transfers, and the extractor device 3 or the hob components 42 can be connected to it.

The glass cover 11 bears on the user interface 10, in particular on the touch-sensitive sensors 13, without a gap. A wall thickness to the glass cover 11 is 3 mm in the area of the touch-sensitive sensors 13. Due to the gap-free arrangement of the glass cover 11 on the touch-sensitive sensors 13 and the small wall thickness to the glass cover 11, the detection of user input is particularly sensitive and reliable. The hob system 1 works as follows:

The hob system 1 is initially in a switched-off state. A display area 14, which is in the form of a switch-on symbol 14d, is illuminated by means of the illuminant 12 located behind it. The other illuminants 12, the cooktops 2 and the extractor device 3 are deactivated.

To activate the cooktop system 1, a user places a fingertip on the switch-on symbol l4d, which is overlapped in a top view by the rear grind l7a. The touch with the fingertip is detected by the touch-sensitive sensor 13, which overlaps the switch-on symbol 14d in a plan view. The user interface control unit 18, which is in signal connection with the touch-sensitive sensor 13, transmits a signal for switching on the hob system 1 to the hob system control unit 22. A first operating menu is activated, with a certain subset of the lamps 12 being switched on. The touch-sensitive sensors 13, which overlap the switched-on illuminant 12, are read out for detecting further user inputs.

The light emitted by the illuminants 12 passes through the light guide body 27 and the body recesses 29 to the cover recesses 30.

The limitation of the display areas 14 by means of the masking element 31 ensures a particularly sharp representation of symbols. The display surfaces 14 can be displayed in this way with a particularly high luminosity and sharpness. An actuation of the display surface 14 designed as a fan symbol l4e is detected by means of the touch-sensitive sensor 13 overlapping the fan symbol l4e. The operating menu is changed, in particular into an extractor control menu, whereby both the subset of the activated lamps 12 and the color of the multicolored lamps 12b are changed.

The front grind l7b overlaps a touch-sensitive sensor 13 formed as a touch-sensitive sliding bar. Corresponding to an actuation position along the groove-shaped front grind l7b, the one supplied to the extractor device 3 can Power can be set. The actuation position is thus determined by means of the user interface control unit 18 and transmitted to the cooktop system control unit 22 in the form of a corresponding signal. The hob system control unit 22 then adjusts a corresponding de power supply to the extractor device 3. To control the individual hotplates 5, the respective hotplate 5 is first selected by touching the respective seven-segment display 14a. The corresponding operating menu, in particular a hob control menu, is activated, a corresponding subset of the lamps 12 being activated and the multicolored lamps 12b providing light with a corresponding color. In the same way as for setting the fume extraction power, the heating power of the selected hotplate 5 can be adjusted by actuating the touch-sensitive sensor 13 overlapped by the front ground joint l7b.

The user interface 10 ensures the input and output of further information. The user can be warned, in particular in a fault menu, if the control device 4, in particular the glass cover 11, exceeds a certain limit temperature. For this purpose, a temperature of the glass cover 11 is detected by means of the temperature sensor 33 and read out by the user interface control unit 18. When a certain limit temperature be exceeded, a warning signal is issued to the user by means of the lamps 12. The controller can take further measures.

Furthermore, a time switch can be set by means of the user interface 10, in particular in a timer menu. The hotplates 5 can be switched off automatically after a definable period of time by means of the timer. Alternatively or additionally, an acoustic message can be issued after the definable period of time has elapsed.

By actuating the touch-sensitive sensor 13 in the area of the switch-on symbol 14d, the extractor device 3 and the hotplates 5 are deactivated again. All of the illuminants 12, except for the illuminant 12 on which the switch-on symbol 14d is based, who deactivates the. The hob system 1 is again in the switched-off state.

The user interface 10 with the plurality of illuminants 12, the touch-sensitive sensors 13, the display mask 21 and the light guide body 20 formed in one piece, wherein At least two of the display areas 14 can be illuminated independently of one another and the detection area 16 of the respective sensor 13 overlaps at least one of the display areas 14 in a plan view, advantageously ensures a particularly high areal density of the display areas 14 that can be represented, a particularly high light intensity and sharpness of the symbols shown and a particularly intuitive operation directly in the area of the display areas 14. The glass cover 11 together with the user interface 10 ensures a clear and clearly visible display of the illuminated display areas 14 and complete concealment of non-illuminated display areas 14. The one-piece design of the glass cover 11 with the frame element 9 the user interface 10 and the extractor device 3 are optically combined in a particularly appealing manner. A tint of the glass pane 35 is preferably coordinated with a tint of the cookware carriers 6 such that they can hardly be distinguished from one another, as a result of which a particularly harmonious overall impression of the hob system 1 is achieved.

Claims

claims 1. User interface for a control device of a hob system, comprising  1.1. several illuminants (12),  1.2 at least one touch-sensitive sensor (13),  1.3. a display mask (21) with  1.3.1. several translucent display surfaces (14) and  1.3.2. an opaque masking element (31) which delimits the plurality of display surfaces (14) and  1.4. an integral light guide body (20) for guiding light between the plurality of illuminants (12) and the plurality of display surfaces (14), 1.5. wherein at least two of the display surfaces (14) connected to the integrally formed light guide body (20) can be illuminated independently of one another and 1.6. wherein a detection area (16) of the at least one touch-sensitive sensor (13) overlaps at least one of the plurality of display areas (14) in a plan view. 2. User interface according to claim 1, characterized in that the display mask (21), the light guide body (20) and the at least one touch-sensitive sensor (13) are integrally connected. 3. User interface according to claim 1 or 2, characterized in that at least 10 of the plurality of illuminants (12) are arranged in a plan view on a coherent surface of at most 10 cm ² . 4. User interface according to one of the preceding claims, characterized in that the at least one touch-sensitive sensor (13) is designed as a sensor film (32). 5. User interface according to one of the preceding claims, characterized by at least 10 touch-sensitive sensors (13) whose detection areas (16) each overlap at least one of the display areas (14) in a plan view. 6. User interface according to one of the preceding claims, characterized in that the at least one touch-sensitive sensor (13) is arranged along an illumination direction (20a) between the plurality of illuminants (12) and the display mask (21). 7. User interface according to one of the preceding claims, characterized by at least one temperature sensor (33). 8. Glass cover for a control device of a hob system, comprising  8.1. a glass pane (35) with a glass underside (36a),  8.2. an opaque barrier coating (37) applied to the underside of the glass (36a) with at least two translucent coating recesses (38) and 8.3. a tint coating (39) applied to the glass underside (36a) in the region of the at least two coating recesses (38),  8.4. the glass cover (11) in the region of the at least two coating recesses (38) having a light transmittance of at most 25%. 9. Glass cover according to claim 8, characterized in that the glass pane (35) has a tint which limits a light transmittance of the glass pane (35) to at most 60%. 10. Glass cover according to claim 8 or 9, characterized by at least one cut in on a glass upper side (36a) of the glass pane (35) (l7a, l7b). 11. Control device for hob system, comprising  11.1. at least one interface (40) for connecting a hob (2),  11.2. at least one interface (40) for connecting an extractor device (3) for extracting cooking fumes downwards and 11.3. at least one user interface (10) according to one of claims 1 to 7. 12. Control device according to claim 11, characterized by a glass cover (11) according to one of claims 8 to 10. 13. Control device according to claim 11 or 12, characterized in that a distance between the glass cover (11) and the user interface (10) is less than 0.5 mm. 14. Hob system with  14.1. a control device (4) according to one of claims 11 to 13,  14.2. at least one signal connected to the control device (4)  Hob (2) for heating food,  14.3. at least one with the control device (4) in signal connection  Extractor hood device (3) for extracting cooking fumes downwards. 15. Hob system according to claim 14, characterized in that the glass cover (11) completely surrounds a cooking fume inlet opening (7) of the fume extraction device (3).