Domestic appliance with touchscreen and detachable rotary knob

Abstract

A method (S1-S8) is used to operate a domestic appliance (1) which has a control panel (2) with a touchscreen (7), wherein a rotary knob (8) can be detachably placed in various positions on the control panel (2), a plurality of control setting fields (M1-M5) can be displayed at the same time on the touchscreen, each of which control setting fields (M1-M5) can be activated in order to set an associated appliance parameter, and wherein in the method, when no rotary knob is in place (S2), a particular control setting field (M1) is activated by manual actuation of same and is displayed in enlarged form (S5) such that at least one other control setting field (M2-M4) is no longer displayed, and the associated appliance parameter can be set manually (S3-S5) on the enlarged control setting field (M1-U), and when a rotary knob (8) is in place on the touchscreen (S2), by activating a particular control setting field (M1) this control field and the other control setting fields (M2-M5) remains displayed at the same time, and the associated appliance parameter can be set on the activated control setting field (M1) by actuating the rotary knob (S6-S8).

Description

[0001] Household appliance with touchscreen and removable rotary knob

[0002] The invention relates to a method for operating a household appliance having a control panel with a touchscreen, wherein a rotary knob can be removably attached or removed at different positions on the control panel and, when the rotary knob is attached to the touchscreen, an associated appliance parameter can be adjusted by rotating the rotary knob on a setting control field displayed on the touchscreen. The invention also relates to a household appliance having a control panel with a touchscreen, wherein a rotary knob can be removably attached to the control panel at different positions, several setting control fields can be displayed simultaneously on the touchscreen, and further comprising a control device designed to carry out the method.The invention also relates to a system comprising at least one such household appliance and at least one rotary knob configured to operate the touchscreen according to the method. The invention is particularly advantageously applicable to household cooking appliances and small household appliances.

[0003] DE 10 2012 210 563 A1 discloses an operating device for actuating a touchscreen. The operating device is designed as an attachment for the touchscreen and has at least one movable actuating element that can be releasably placed on the touchscreen, the movement of which actuates the touchscreen. A system comprises the operating device and an operating device with at least one touchscreen that can be actuated by the operating device. A method is used for operating an operating device equipped with a touchscreen. The operating device is placed on the touchscreen, and an application program running on the operating device can be operated by moving at least one actuating element of the operating device.

[0004] DE 10 2019 220 235 A1 discloses a method for selecting operating menus on an operating device of a household appliance, in which a separate operating element is arranged at a defined operating position on the operating device, and by arranging the operating element, a standard operating menu is automatically selected. A second operating element, separate from the first operating element, is arranged at a defined operating position on the operating device, and by arranging the second operating element, a reduced operating menu is selected, in which a reduced operating functionality is activated for the household appliance compared to the standard operating menu. A household appliance is also disclosed.

[0005] EP 2 511 807 A2 discloses an operating device for an electrical device, comprising a flat, capacitive touchscreen with a control for operation by moving a finger placed on the touchscreen. A magnet for a movable operating element is arranged on the touchscreen as a holding device for additional input of operating commands as an additional operation. The operating element is designed such that signal transmission from the operating element occurs capacitively, or that operation via the operating element can be detected by the touchscreen itself.

[0006] WO 2016 / 078893 A1 discloses a household appliance having at least one operating area that has at least one touch-sensitive operating element and is configured for operation by means of a removable operating element, wherein the operating area is configurable depending on a position of the removable operating element relative to the operating area. A method is used for operating a household appliance having an operating area that has at least one touch-sensitive operating element and is configured for operation by means of a removable operating element, wherein the operating area is configured depending on a position of the removable operating element relative to the operating area.

[0007] WO 2018 / 095773 A1 discloses a haptic control element for a household appliance, which has a display panel that is at least partially configured as a touch-sensitive screen. The household appliance has at least one haptic control element and another screen fixed to the appliance. The household appliance, in particular, has a control device for operating the display panel of the control element and the screen fixed to the appliance.

[0008] It is the object of the present invention to at least partially overcome the disadvantages of the prior art and in particular to provide a possibility for a user to set device parameters on a household appliance particularly quickly and precisely in an intuitive, clear and understandable manner.

[0009] This object is achieved according to the features of the independent claims. Preferred embodiments can be found in particular in the dependent claims.

[0010] The object is achieved by a method for operating a household appliance having a control panel with a touchscreen, wherein

[0011] - a rotary knob can be removably and rotatably mounted on the control panel at different positions,

[0012] - several setting control fields can be displayed simultaneously on the touchscreen, of which one setting control field can be activated in each case to set an associated device parameter, and wherein in the method

[0013] - if no rotary knob is or is not in place, by manually operating a specific setting control field, this setting control field is activated and displayed in such an enlarged manner that at least one other setting control field is no longer displayed, and the associated device parameter can be manually set on the enlarged setting control field, and

[0014] - when a rotary knob is or is placed on the control panel, by activating a specific setting control field this control field remains displayed at the same time as the other setting control fields and the associated device parameter can be set on the activated setting control field by operating the rotary knob.

[0015] This method has the advantage that when a device parameter is set using the rotary knob (when the rotary knob is mounted on the control panel), an operating or menu level is saved compared to operation by touch, which saves the user time when making the settings. In addition, the view of the touchscreen is clearer for the user when the rotary knob is present, as no other setting control fields are covered when the device is being set. This is due, among other things, to the fact that the currently activated setting control field can be displayed in a comparatively small size when set using the rotary knob, as no area needs to be provided for manual operation. In addition, device parameters can be accessed and set with particular precision using the rotary knob.

[0016] In addition, certain users prefer control via haptic elements over touch or are used to this from their traditional devices.

[0017] Alternatively, the touchscreen can be set up without the rotary knob, for example, if a user prefers touch control or if the rotary knob isn't easily found. This is particularly advantageous in a household with multiple family members, as each household member can then individually choose the most suitable control method. This also increases user satisfaction.

[0018] It is an embodiment that the household appliance is a large household appliance (in particular in the sense of "white goods") such as a cooking appliance (e.g. an oven, a microwave oven, a steamer, a hob, etc. or any combination thereof), a dishwashing appliance (e.g. a dishwasher, a sterilizer, etc. or a combination thereof), a laundry appliance (e.g. a washing machine, a tumble dryer or a combination thereof) or a cooling appliance (e.g. a refrigerator, a freezer or a combination thereof).

[0019] It is an embodiment that the household appliance is a small household appliance such as a food processor, a coffee machine (e.g. a fully automatic coffee machine, a capsule machine, etc.), a blender, etc.

[0020] It is a further development that the control panel has a plate made of metal or plastic that has a cutout for the touchscreen so that the touchscreen can be seen and operated by a user.

[0021] A further development is that the control panel has at least one additional button in addition to the touchscreen. This offers the advantage that certain appliance functions can be activated or deactivated independently of the control fields currently displayed on the touchscreen. This applies, for example, to central operating functions such as switching the household appliance on and off and / or operating functions for adjusting the display content of the touchscreen, such as vertical or horizontal scrolling, jumping back to a higher or highest menu level, etc. The at least one button can be, for example, a mechanical button such as a short-stroke key, etc., or a touch-sensitive sensor field, in particular a capacitive sensor field.

[0022] A further development is that the control panel has at least one display field in addition to the touchscreen. This offers the advantage that information can be displayed to the user independently of the current display on the touchscreen. For example, a display field can indicate the presence and strength of a wireless communication connection.

[0023] The rotary knob can generally be attached to the touchscreen itself and / or can be attached to an area of ​​the control panel surrounding the touchscreen. A further development is that the rotary knob can be attached to at least one specific attachment position on the control panel and then partially protrudes over the touchscreen. This has the advantage that the rotary knob can be mounted robustly and reliably on the control panel in a rotatable manner, in particular on a metal plate thereof, and the rotary movement of the rotary knob can be detected by the touchscreen. The fact that the rotary knob can be removably attached can also be described as the rotary knob being able to be removed by a user without causing damage. The rotary knob can be removably attached, for example, by magnetic adhesion. The attachment and detection of a rotary movement of the rotary knob is generally known and will therefore not be explained further.

[0024] A setting control panel is understood to be an area, in particular a partial area, of the touchscreen that is intended for setting a corresponding device parameter and is actuated or activated for this purpose. The setting control panel can be designed, for example, as a menu tile. A further development is that only one setting control panel from the group of several setting control panels displayed simultaneously on the touchscreen can be activated or activated at a time to set the corresponding device parameter.

[0025] The fact that a setting control panel can be activated for setting a corresponding device parameter can mean that the setting control panel can be activated by manual operation (e.g., using a finger, a stylus, etc.) if no rotary knob is present. If a rotary knob is attached, a setting control panel can - depending on the design - be activated only by the rotary knob or can be activated either by the rotary knob or manually. It is also possible that with a rotary knob attached, at least one of the setting control panels can only be activated by manual operation.

[0026] In general, the setting of the device parameters - even across several menu levels - can be carried out purely by manual operation of the setting control fields, purely via the rotary knob or in a hybrid manner by a combination of manual operation and operation of the rotary knob, e.g. by manually activating a setting control field and setting the corresponding device parameter via the rotary knob.

[0027] If no rotary knob is in place, a specific setting field is manually activated and, upon activation, is displayed enlarged, i.e., larger than before activation. Due to the enlargement, at least one other setting field that was displayed before activation is no longer displayed. It is particularly advantageous for providing a large operating area on the enlarged setting field if, apart from the enlarged setting field, no other setting field that was displayed before activation is displayed. Furthermore, the associated device parameter can be manually set in the enlarged display, which is not the case in the display before activation.This change of the setting control field into a state without and a state with activation can also be viewed as a change of the menu level of an operating menu offered on the touchscreen, namely from a higher menu level without activation of a setting control field to a lower menu level with activation of a setting control field. In particular, the setting control fields are offered for activation in the higher menu level, and a manual setting of an associated device parameter for an activated setting control field is offered in the lower menu level. In particular, when described using menu levels, the enlarged, activated setting control field can also be viewed as a new—in particular, the only—setting control field of the lower menu level, the content of which depends on the setting control field activated at the higher menu level.

[0028] When the setting of the device parameter in the lower menu level is or has been completed, the system returns to the higher menu level. In a further development, the enlarged setting control field in the higher menu level can be displayed in its original size, i.e. before it was activated, in particular without the option of setting a device parameter in the higher menu level. In another development, the higher menu level has a different form and / or a different composition of setting control fields after setting or selecting a device parameter in the lower menu level. For example, in one possible implementation, a device parameter previously selected in the lower menu level can no longer be displayed or no longer be displayed as a setting control field after returning to the higher menu level.

[0029] However, if the rotary knob is placed on the control panel, activating a specific setting field will cause that field to remain displayed simultaneously with the other settings. The activated setting field can be highlighted in color, for example. This feature can also be expressed in such a way that using the rotary knob to activate a setting field does not change the menu level, allowing for faster adjustment of a device parameter than without the rotary knob.

[0030] The positioning of the rotary knob on the control panel can, in particular, involve the control lever being placed on an edge of the control panel—particularly a metal one—surrounding the cutout for the touchscreen in such a way that the rotary knob partially protrudes over the touch field when viewed from the front. This results in a particularly compact arrangement.

[0031] Actuating the rotary knob may, for example, include rotating the rotary knob, tilting the rotary knob, deflecting the rotary knob sideways, etc.

[0032] The settings panel, before and / or after activation, can display, for example, the name or designation of the device parameter and / or the currently selected parameter selection. The parameter selection can be a quantitative value, a level, or the name of the selection. For example, the following device parameter designations with associated parameter selection options can be displayed:

[0033] For an oven: - Designation "Heating type" with corresponding parameter selection options "Top heat", "Bottom heat", "Top and bottom heat", "Grill", "Hot air", etc.;

[0034] - Designation "cooking chamber temperature" with corresponding parameter values ​​between 30 °C to 280 °C in steps of e.g. 1 °C, 5 °C, 10 °C, etc.;

[0035] - Designation "Timer" with corresponding parameter values ​​between 0 and 12 h, e.g. in steps of 1 min, 5 min, 10 min, etc.;

[0036] - Designation "microwaves" with associated parameter selection "on" and "off";

[0037] - Designation "steam" with corresponding parameter selection "low", "medium" and "high";

[0038] - Designation "Language" with corresponding parameter selection "German", "English", etc.;

[0039] - Designation "Time" with corresponding parameter values ​​from 0:00 h to 24:00 h in steps of e.g. 1 min.

[0040] Other device parameters can include, for example, volume, brightness, date, favorites, etc.

[0041] For a fully automatic coffee machine:

[0042] - Designation "Coffee type" with corresponding parameter selection "Espresso", "Latte Macchiato", "Americano", etc.

[0043] - Designation "Size" with corresponding parameter values ​​of 80 ml, 120 ml, 160 ml, etc.;

[0044] - Designation "strength" with associated parameter selection "mild", "medium", "strong" or with associated parameter values ​​between 1 (very mild) and 12 (very strong).

[0045] One design allows the corresponding device parameter to be manually adjusted by sliding the enlarged control panel when no rotary knob is in place. This allows for particularly quick and easy operation. In other words, the activated, enlarged control panel is configured as a manually operable "slider," e.g., with a finger. For example, by swiping across the activated control panel from left to right, device parameters can be enlarged, and by swiping across the activated control panel in the opposite direction, from right to left, the device parameters can be reduced in the opposite direction. As an alternative to a slider, manual adjustment can be performed, for example, using a virtual rotary wheel (so-called "scroll bar"), etc.One design feature is that, when no rotary knob is in place, the activated, enlarged control panel is the only control panel displayed. This offers the advantage that manual operation can be performed over a large portion, if necessary, even the entire surface of the touchscreen, enabling particularly comfortable and precise operation, especially for older or visually impaired users. When using a virtual slider, it is particularly advantageous if the touchscreen's control panel occupies the entire width of the touchscreen.

[0046] One embodiment is such that when the rotary knob is attached, at least two of the adjustment control panels align with the current (attachment) position of the rotary knob. This facilitates operation for a user by creating a recognition effect aligned with the rotary knob. For example, the adjustment control panels can be arranged according to a specific proximity to the rotary knob, e.g., with adjustment control panel A directly adjacent to the rotary knob, adjustment control panel B as the next adjustment control panel, etc.

[0047] One design allows the rotary knob on the control panel to be positioned either to the left or right of the touchscreen, and the order of the displayed control fields on the touchscreen is reversed depending on the position of the rotary knob. This is particularly advantageous for switching between a rotary knob position that is particularly suitable for left-handed and right-handed users. The touchscreen advantageously extends lengthwise in a "horizontal" direction, meaning that when viewed from above, it has an elongated extension oriented from left to right or vice versa.

[0048] One design allows the displayed setting fields to remain active even when the rotary knob is in place. This advantageously enables hybrid operation, where the setting fields can be operated either manually or using the rotary knob. Furthermore, it offers the advantage of particularly fast, sequential adjustment of several different device parameters.

[0049] One design is such that, when the rotary knob is in place, the rate of change of the device parameter increases disproportionately with the rotation speed of the rotary knob. This advantageously enables particularly fast yet precise adjustment of large parameter values.

[0050] One embodiment is such that, when the rotary knob is in place, certain values ​​of the device parameter are easier to access than others when turning the rotary knob. This allows for particularly quick setting of values ​​considered preferred (e.g., "round" values ​​or values ​​frequently selected by a user) compared to values ​​considered less preferred (e.g., "curved" values ​​or values ​​rarely selected by a user). This embodiment can be implemented, for example, such that parameter values ​​considered preferred are displayed for a larger angular range of the rotary knob's rotation than less preferred values.

[0051] One embodiment provides at least one acoustic feedback signal regarding the rotation of the rotary knob when the rotary knob is in place. This facilitates operation of the touchscreen. For example, setting a parameter value or selecting another parameter can be accompanied by an acoustic click. Furthermore, when browsing through setting fields, a sound reminiscent of turning the pages of a book can be emitted when a new setting field is available for selection. Furthermore, a sound can be emitted when a specific parameter selection has been made or the user has decided on a specific parameter selection. The sound can be emitted via a speaker on the device.

[0052] The object is also achieved by a household appliance having a control panel with a touchscreen, wherein

[0053] - a rotary knob can be removably attached to different positions on the control panel,

[0054] - several setting control panels can be displayed simultaneously on the touchscreen, each of which can be activated to set an associated appliance parameter, and further comprising a control device designed to carry out the method according to one of the preceding claims. The household appliance can be designed analogously to the method, and vice versa, and has the same advantages. Thus, it is a further development that the household appliance is a large household appliance, in particular a household cooking appliance, especially an oven. It is also a further development that the household appliance is a small household appliance, in particular a coffee machine.

[0055] The object is further achieved by a system comprising at least one household appliance as described above and at least one rotary knob configured to operate the touchscreen as described above. The system can be configured analogously to the household appliance and / or the method, and vice versa, and has the same advantages.

[0056] One embodiment of the system is that it comprises multiple household appliances, especially of different types (e.g., a cooking appliance and a coffee machine), which can be operated using the same rotary knob. This provides the advantage that only one rotary knob needs to be used to operate multiple household appliances, saving resources, space, and costs.

[0057] The above-described properties, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following schematic description of an embodiment, which is explained in more detail in connection with the drawings.

[0058] Fig. 1 shows components of a household appliance, including a touchscreen; Fig. 2 shows a possible flowchart for implementing the method;

[0059] Fig.3 shows a front view of the touchscreen without rotary knobs in a higher menu level;

[0060] Fig.4 shows a front view of the touchscreen without rotary knobs in a lower menu level;

[0061] Fig.5 shows a front view of the touchscreen with a rotary knob placed in the area of ​​a left edge; and

[0062] Fig. 6 shows a front view of the touchscreen with a rotary knob attached in the area of ​​a right-hand edge. Fig. 1 shows a sketch of components of a household appliance 1, namely a control panel 2 with a metallic front plate 3, a control device 4 which is data-linked to the control panel 2, and a loudspeaker 5. The front plate 3 has a cutout e in which a touch-sensitive screen or touchscreen 7 is embedded. A rotary knob 8 can be magnetically attached to the metallic front plate 3 at a left and right edge of the cutout 6 as viewed in the direction of the control panel 2. The touchscreen 7 is slightly covered in the process, and a rotary movement of the rotary knob 8 with regard to its direction of rotation and its speed of rotation can be detected by means of the area of ​​the touchscreen 7 located below the rotary knob 8.Permanent control and / or display fields can be present on the front panel 3, e.g. a capacitive sensor field 9 as an on / off switch for the household appliance 1, a backlit display field 10 for displaying a WLAN connection, a sensor field 11 for jumping back in a menu structure to the next higher menu level or the highest menu level, a sensor field 12 for calling up a cookbook, etc.

[0063] Fig.2 shows a possible flow chart for carrying out the method described above using the household appliance 1.

[0064] In a step S1, the household appliance 1, in particular its control device 4, is to provide a higher menu level with several setting control fields in the form of "menu tiles" M1 to M5 (see Fig.3) in the touchscreen 2, e.g. because the household appliance 1 has been switched on or because the higher menu level has been selected from an even higher menu level.

[0065] In a step S2, the household appliance 1, in particular its control device 4, checks whether a rotary knob 8 is attached to the control panel 2 or not.

[0066] If this is not the case ("N"), in step S3, the control device 4 sets up and displays the menu tiles M1 to M5 - as shown in Fig. 3 - on the rectangular touchscreen 3, which is here aligned horizontally with its longitudinal extension. Each of the menu tiles M1 to M5 displays at least a designation of the device parameter that can be set by activation and the current parameter selection, in particular a parameter value. For example, in menu tile M1, the device parameter "Temperature" and the currently set cooking chamber temperature setpoint "200 °C".

[0067] Returning to Fig. 2, in step S4 following step S3, it is checked whether one of the menu tiles M1 to M5 is manually activated, e.g., tapped by a user's finger. If this is not the case ("N"), the check continues, e.g., until a predefined time period has elapsed, until a return command to a higher menu level is received, and / or until a cooking operation is started, etc.

[0068] However, if the query in step S4 is positive ("Y"), i.e. that one of the menu tiles M1 to M5 has been manually operated, a branch is made to a lower menu level in step S5, in which the operated and thus activated menu tile (here: menu tile M1) is now displayed as an enlarged menu tile M1-U, on which a parameter value of the device parameter cooking chamber temperature associated with the menu tile M1 can be set by manual operation.

[0069] Fig. 4 shows the enlarged menu tile M1-U, which here, for example, takes up the entire width of the touchscreen 7 and, apart from an optional status bar SL set up at the top, also the entire height. The menu tiles M1 to M5 present in the higher menu level are therefore no longer visible. In the menu tile M1-U, a user can set the setpoint for the cooking chamber temperature by sliding a finger, stylus, or similar on an actuation area BB, which is designed here, for example, as a slider, e.g., increase it by sliding from left to right and decrease it from right to left. The currently set setpoint is displayed in a subfield TF1. By pressing a subfield TF2, the currently set setpoint is confirmed and the user returns to the next higher menu level shown in Fig. 3, which is indicated in Fig. 2 by transitioning to step S3.

[0070] Returning to Fig. 2, if the household appliance 1 has detected in step S2 that a rotary knob 8 is attached to the control panel 2 ("Y"), a check is performed in step S6 to determine whether or not the rotary knob 8 has been attached to the left edge of the touchscreen 3 as viewed from the control panel 2. If this is the case ("Y"), the menu tiles M1 to M5 remain arranged on the touchscreen 3 in step S7 in an arrangement analogous to Fig. 3, as shown in Fig. 5. Selecting or activating one of the menu tiles M1 to M5 can be done manually (e.g., by tapping). Selecting or activating one of the menu tiles M1 to M5 can alternatively or additionally be done by turning the rotary knob 8 and thus scrolling ("browsing") through the menu tiles M1 to M5 and staying on a specific menu tile M1 to M5 for a specific period of time, e.g., 2 s. Selecting orActivating one of the menu tiles M1 to M5 can be done alternatively or additionally by turning the rotary knob 8 and thus scrolling through the menu tiles M1 to M5 until you reach the desired menu tile M1 to M5, and then tilting the rotary knob 8. Using the rotary knob 8 eliminates the need to access a lower menu level, which allows for particularly fast setting of the device parameter or the associated parameter selection. Furthermore, the rotary knob 8 allows for more precise and therefore faster setting of the device parameter compared to manual setting.

[0071] If a specific menu tile M1 to M5 is activated, this can be highlighted in color, for example. By turning the rotary knob 8, the current parameter selection displayed on the activated menu tile M1 to M5 can be changed, e.g., by turning the rotary knob 8 counterclockwise, it can be decreased and by turning it clockwise, it can be increased, possibly at a rate of change disproportionate to the rotation speed. Turning the rotary knob 8 can be accompanied by acoustic signals, e.g., scrolling, clicking, etc., which are output via the loudspeaker 5.

[0072] Returning to Fig. 2, once it has been detected in step S6 that the rotary knob 8 has been placed on the right edge of the touchscreen 3 ("N"), the menu tiles M1 to M5 are arranged in step S8 in a horizontally reversed order to Fig. 5, as shown in Fig. 6. The device parameters can be selected and set analogously to Fig. 5. This arrangement is particularly easy to use for right-handed users.

[0073] Following step S7 or step S8, a currently activated menu tile M1 to M5 can be deactivated, for example, by activating another menu tile M1 to M5, returning to a higher menu level, etc. (not shown). Of course, the present invention is not limited to the illustrated embodiment.

[0074] In this way, the attachment, transfer and removal of the rotary knob 8 in a further training can be detected at any time and the operation of the touchscreen 7 can be adjusted accordingly.

[0075] In general, "a", "an", etc., can be understood as a singular or a plural, in particular in the sense of "at least one" or "one or more", etc., as long as this is not explicitly excluded, e.g. by the expression "exactly one", etc.

[0076] A numerical value may also include the exact number stated as well as a usual tolerance range, as long as this is not explicitly excluded.

[0077] List of reference symbols

[0078] 1 household appliance

[0079] 2 control panel

[0080] 3 Front panel

[0081] 4 Control device

[0082] 5 speakers

[0083] 6 Excerpt

[0084] 7 touchscreen

[0085] 8 rotary knobs

[0086] 9 Sensor field

[0087] 10 Display field

[0088] 11 Sensor field

[0089] 12 Sensor field

[0090] BB operating area

[0091] M1-M5 menu tile

[0092] M1-U menu tile

[0093] S1-S8 process steps

[0094] SL status bar

[0095] TF1 subfield

[0096] TF2 subfield

Claims

Claims Method (S1-S8) for operating a household appliance (1) which has a control panel (2) with a touchscreen (7), wherein - a rotary knob (8) can be detachably attached to the control panel (2) in different positions, - several setting control panels (M1-M5) can be displayed simultaneously on the touchscreen (7), of which one setting control panel (M1-M5) can be activated to set an associated device parameter, and wherein the procedure - then, if no rotary knob (8) is attached (S2), by manually operating a specific setting control panel (M1) this control panel (M1) is activated and displayed in such a way (S5) that at least one other setting control panel (M2-M4) is no longer displayed, and the associated device parameter can be manually set on the enlarged setting control panel (M1-U) (S3-S5), and - then, when a rotary knob (8) is placed on the touchscreen (7) (S2), by activating a specific setting control panel (M1), this control panel (M1) remains displayed simultaneously with the other setting control panels (M2-M5), and the associated device parameter can be adjusted on the activated setting control panel (M1) by turning the rotary knob (8) (S6-S8). Method (S1-S8) according to claim 1, wherein, when no rotary knob (8) is placed (S2), the associated device parameter can be adjusted manually by performing a sliding movement on the enlarged setting control panel (M1-U). Method (S1-S8) according to any of the preceding claims, wherein, when no rotary knob (8) is placed, the enlarged setting control panel (M1-U) is the only setting control panel displayed.Method (S1-S8) according to one of the preceding claims, wherein when the rotary knob (8) is placed (S2), at least two of the setting control panels (M1-M5) align themselves to the current position of the rotary knob (8).

5. Method (S1-S8) according to claim 4, wherein the rotary knob (8) on the control panel (2) can be optionally placed to the left or right of the touchscreen (7) and the positions of the displayed setting control fields (M1-M5) are reversed depending on the position of the rotary knob (8) (S7, S8).

6. Method (S1-S8) according to one of the preceding claims, wherein, when the rotary knob (8) is attached, the displayed setting control fields (M1-M5) remain activatable.

7. Method (S1-S8) according to one of the preceding claims, wherein, when the rotary knob (8) is attached, the rate of change of the device parameter increases disproportionately with the rotational speed of the rotary knob (8) (S7, S8).

8. Method (S1-S8) according to one of the preceding claims, wherein, when the rotary knob (8) is attached, certain values ​​of the device parameter are easier to control when the rotary knob (8) is turned than other values.

9. Method (S1-S8) according to one of the preceding claims, wherein, when the rotary knob (8) is attached, at least one acoustic feedback concerning a rotation of the rotary knob (8) is output (S7, S8).

10. Household appliance (1) comprising a control panel (2) with a touchscreen (7), wherein - a rotary knob (8) can be detachably attached to the control panel (2) in different positions, - several setting control fields (M1-M5) can be displayed simultaneously on the touchscreen (7), of which one setting control field (M1-M5) can be activated to set an associated device parameter, and further comprising a control device (4) which is designed to carry out the method according to one of the preceding claims. Household appliance (1) according to claim 10, wherein the household appliance (1) is a large household appliance, in particular a household cooking appliance. Household appliance (1) according to claim 10, wherein the household appliance (1) is a small household appliance, in particular a coffee machine. System (1, 8) comprising at least one household appliance (1) according to any one of claims 10 to 12 and at least one rotary knob (8) configured for operating the touchscreen (7).

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