Control device for a smart home system

Abstract

Operating device (1) as a human-machine interface (1) for operating an electrical device of a building, in particular a device of a smart home system, comprising: a housing (11, 15), a communication unit (2) for sending and / or receiving data, a power supply unit (3) for supplying the operating device with electrical energy, an optical projection unit (4) with a light source for projecting information onto a projection surface (50), in particular the surface (50) of a wall (12) and / or a floor (13) and / or a ceiling of the building, with projected light, a primary mechanism (31) for a primary translational movement of the optical projection unit in a primary direction of movement (32), such that the optical projection unit (4) is movable between a retracted rest position and an extended operating position,a detection unit (9) for detecting the information transmitted by a user to the operating device (1), wherein the operating device (1) comprises a secondary mechanism (40) for a secondary rotational movement of the optical projection unit (4) in a secondary direction of movement (41), such that the optical projection unit (4) is movable between different rotational positions.

Description

[0001] The present invention relates to an operating device as a human-machine interface for operating an electrical device of a building according to the preamble of claim 1. State of the art

[0002] Electrical mechanical switches in buildings serve as a control device, acting as a human-machine interface for operating electrical devices, such as turning a ceiling light on and off in a room. Smart switches have a communication unit for sending and / or receiving data with a building's bus system, such as a KNX bus system. A smart switch can therefore control various electrical devices in a building, such as lighting fixtures, electric blind drives, heating systems, or air conditioning. Generally, smart switches can also be programmed, allowing different electrical devices to be reassigned to them over time, thanks to the flexibility of the bus system.Furthermore, it is known to integrate an optical projection unit into a smart switch to project an image onto a projection surface. The projection surface is the surface of a wall, floor, and / or ceiling of the building. This allows data to be displayed visually as images on the projection surface.

[0003] DE 10 2008 056 409 A1 discloses an electrical installation device such as a socket, a switch or a push button, with a terminal block for connecting a 230 V AC power supply and with a light source serving as orientation lighting and shining through a light outlet opening of the device housing, wherein the light source shines through the light outlet opening via a converging lens, a mask and a projection lens, wherein the shape of a light symbol to be projected, preferably a directional arrow, can be specified by means of the mask.

[0004] DE 10 2014 114 320 B4 discloses an electrical or electronic installation device for use with existing building installation systems, essentially consisting of an operating attachment and an insert designed for installation in a standard flush-mounted installation box, wherein the insert contains a logic unit for processing and preparing control information for the demand-based control of actuators installed in buildings, and wherein the logic unit is connected to the attachment and at least one actuator of the building installation via data technology, wherein the insert houses a projector module connected to the logic unit via data technology, which emits its emitted light to the outside via at least one optical element located in the attachment, and wherein at least part of the light emitted to the outside by the attachment is holographically processed.

[0005] DE 10 2014 104 394 B4 discloses a wall-mounted interface device for the manual control of door closing systems, household appliances, or building technology systems, which includes first means for projecting an optical keyboard and / or optical pictograms onto a material surface, wherein the wall-mounted interface device includes second means for scanning a region of said surface and detecting an object in the fields of the virtual keyboard or in the pictograms, wherein these first and second means together form a projection and detection unit which is installed in a flush-mounted box in a retractable manner, wherein the interface device has a retractable installation device which includes at least a first hollow sliding element for receiving the projection and detection unit and a second guide element in which the sliding element is slidably mounted, either directly or indirectly.wherein the guide element extends for the most part into the flush-mounted box and is rigidly connected to the latter, and wherein the hollow sliding element is provided or molded on the outside with a decorative cover element which, in the retracted position of the installation device, covers the portions of the sliding and guide elements that protrude from the wall surface and also serves as a gripping and handling element of the installation device. Disclosure of the invention Advantages of the invention

[0006] The inventive operating device serves as a human-machine interface for operating an electrical device in a building, in particular a device of a smart home system, comprising: a housing, a communication unit for sending and / or receiving data, a power supply unit for supplying the operating device with electrical energy, an optical projection unit with a light source for projecting information onto a projection surface, in particular the surface of a wall and / or a floor and / or a ceiling of the building, with projected light, a primary mechanism for a primary translational movement of the optical projection unit in a primary direction of movement, such that the optical projection unit is movable between a retracted rest position and an extended operating position, and a detection unit for detecting the information transmitted by a user to the operating device.The operating device preferably comprises a secondary mechanism for a secondary rotational movement of the optical projection unit in a secondary direction of movement, such that the optical projection unit is movable between different rotational positions. Advantageously, this secondary rotational movement allows different projection surfaces, in particular the surface of the wall and / or floor and / or ceiling of the building, to be changed and adjusted manually and / or automatically. A movement with a translational component, i.e., a movement with both a translational and a rotational component, is preferably also considered a rotational movement.i.e., a movement with both a rotational and a translational motion.

[0007] In another embodiment, the primary direction of movement of the translational motion and the axis of rotation of the secondary rotational motion are essentially aligned parallel to each other, in particular with a deviation of less than 30°, 20° or 10°.

[0008] In a supplementary variant, the operating device comprises several optical projection units for projecting information onto different projection surfaces and / or onto at least one identical projection surface. Advantageously, this allows different images to be generated on different projection surfaces, in particular different surfaces of the wall and / or the floor and / or the ceiling of the building, and / or at least two projection surfaces of at least two optical projection units overlap at least partially, in particular completely.

[0009] In an additional embodiment, the optical projection units, in particular all optical projection units, are movable according to at least one feature, in particular several features, described in this patent application with the primary mechanism and / or secondary mechanism.

[0010] Preferably, the optical projection units with secondary rotational movement are independently movable in the secondary direction of movement. This allows the different images on the different projection surfaces to be advantageously repositioned independently of one another on the projection surface, in particular the surface of the wall and / or the floor and / or the ceiling of the building.

[0011] In a further embodiment, the axes of rotation of the secondary rotational movements of the optical projection units, in particular all optical projection units, are essentially identical. Essentially identical axes of rotation preferably means that the axes of rotation have a distance of less than 2 cm, 1 cm, 0.5 cm, or 0.1 cm from each other in the region of the axis of rotation that intersects the operating device, and / or that the axes of rotation are essentially parallel to each other, in particular with a deviation of less than 30°, 20°, or 10°.

[0012] In a supplementary variant, at least one optical projection unit, in particular all optical projection units, is / are integrated into a disc-shaped holding element.

[0013] In a further embodiment, the geometric centers of gravity of the disc-shaped retaining elements lie essentially, and in particular at a distance of less than 2 cm, 1 cm, 0.5 cm, or 0.1 cm, in the axis of rotation of the secondary rotational motion. Preferably, the geometric center of gravity of the retaining elements corresponds to the center of mass of the retaining elements, which is fictitiously made of homogeneous material, i.e., fictitiously has the same density everywhere.

[0014] The disc-shaped retaining elements are expediently arranged one after the other in a row in the direction of the primary direction of movement.

[0015] In a supplementary embodiment, the at least one optical projection unit comprises a scanner for optically scanning and / or detecting an area on the at least one projection surface with the light reflected from the at least one projection surface, so that the at least one optical projection unit additionally functions as at least one detection unit.

[0016] In a further embodiment, the scanner comprises at least one light-sensitive electronic component, in particular at least one photodiode and / or at least one CCD sensor and / or at least one CMOS sensor, for detecting the light emitted and reflected by the light source.

[0017] Preferably, the light source is a laser, in particular an RGB color laser. The RGB laser emits red, green, and blue light.

[0018] In an additional variant, the detection unit is a mechanical button and / or a sensor button, in particular a capacitive button and / or a piezo button and / or a touchscreen, on an outside of the operating device.

[0019] In an additional embodiment, the operating device comprises at least one means, in particular at least partially integrated into the housing, for attaching the operating device to and / or on a wall and / or a floor and / or a ceiling of the building.

[0020] In a supplementary variant, the operating device comprises a control and / or regulation unit which is connected to the detection unit, the communication unit and the at least one optical projection module with data transmission means, in particular data lines, for the control and / or regulation of the building's electrical equipment.

[0021] Advantageously, each optical projection unit comprises at least one optical element, in particular at least one lens and / or at least one mirror and / or at least one prism, for directing the light reflected from the projection surface onto at least one light-sensitive electronic component, and the at least one light-sensitive electronic component, in particular at least one photodiode, as a scanner. Preferably, the scanner of each optical projection unit comprises at least three photodiodes, one each for red, green, and blue light.

[0022] Preferably, each disc-shaped retaining element and / or the disc-shaped retaining elements have an extension as thickness in the direction of the longitudinal axis of the bearing rod and / or in the direction of the rotation axis of the disc-shaped retaining elements, which is essentially identical or the same, in particular with a deviation of less than 30%, 20%, 10% or 5%.

[0023] In a supplementary embodiment, the disc-shaped retaining elements have a substantially identical thickness, in particular with a deviation of less than 30%, 20%, 10% or 5%, in the direction of the longitudinal axis of the bearing rod and / or in the direction of the rotation axis of the disc-shaped retaining elements.

[0024] Preferably, the virtual keyboard projected with the laser beam is a QWERTY keyboard.

[0025] The image projected with the laser beam is appropriately a pictogram.

[0026] In an additional variant, the primary mechanism is equipped with a telescopic mechanism, for example, by designing the bearing rod as a telescopic rod. This allows the sliding bearing bushing with the disc-shaped retaining elements with integrated optical projection units to be moved over a large range of motion between the rest position and the operating position. In particular, the range of motion between the rest position and the operating position is greater than, and preferably more than, the maximum extent of the flush-mounted box in the primary direction of movement, preferably greater than 110%, 120%, 150%, or 200% of, and preferably more than, the maximum extent of the flush-mounted box in the primary direction of movement.

[0027] Preferably, the power supply unit is designed as a battery, in particular a rechargeable battery, and / or as at least one electrical contact element. The operating device can be connected, for example, to an AC power supply, such as a 230 V AC power supply, in the household electrical installation using the at least one electrical contact element.

[0028] In an additional embodiment, the communication unit comprises an antenna for transmitting radio signals and / or at least one electrical contact element for wired data transmission, in particular via a bus system, preferably EMS, KNX, EIB and / or IP. For wireless data transmission with the communication unit, data transmission occurs, for example, via Bluetooth, EnOcean, 868 MHz, WiFi, LTE, Ethernet, 5G, GSM, DECT, Zigbee, Thread, Matter and / or Z-Wave.

[0029] In a supplementary embodiment, at least one component of the operating device, in particular the communication unit and / or the power supply unit and / or the optical projection unit and / or the detection unit and / or the control and / or regulation unit and / or a vibration module and / or a presence detection unit and / or a sensor unit, is controllable and / or regulated and / or programmable via a radio-based transmission of data from an external unit, in particular a smartphone and / or computer, and / or via a radio-based and / or wired transmission of data from a central unit of a smart home system.

[0030] In another embodiment, the operating device can be used to control and / or regulate an electrical device, in particular an electrical device of the smart home system, preferably a smart home device.

[0031] In an additional variant, information from an electrical device, in particular devices of the smart home system, preferably a smart home device, can be reproduced by means of the operating device, in particular displayed, preferably by means of the projection of information onto the projection surface.

[0032] In a further embodiment, the operating device comprises at least one mirror, in particular several mirrors, in particular MEMS mirrors, for deflecting the light emitted by the light source, in particular the laser.

[0033] In another embodiment, the actuators for moving the at least one mirror, in particular the two mirrors, operate with an electromagnetic and / or electrodynamic and / or electrostatic and / or thermoelectric and / or piezoelectric operating principle.

[0034] In an additional variant, the RGB laser emits light as red light with a wavelength of essentially, in particular with a deviation of less than 30%, 20% or 10%, 635 to 640 nm, green light with a wavelength of essentially, in particular with a deviation of less than 30%, 20% or 10%, 515 to 525 nm and blue light with a wavelength of essentially, in particular with a deviation of less than 30%, 20% or 10%, 450 to 460 nm.

[0035] Each optical projection unit expediently comprises a mirror that can be pivoted about a first and second pivoting axis.

[0036] In another embodiment, the optical projection unit comprises a first mirror that can be pivoted about a first pivot axis and a second mirror that can be pivoted about a second pivot axis.

[0037] Preferably, the first and second pivot axes of the at least one mirror in each optical projection unit are aligned essentially at a right angle to each other, in particular with a deviation of less than 30°, 20° or 10°.

[0038] In a supplementary variant, the laser is designed as a laser diode, preferably with an optical element.

[0039] In an additional embodiment, the operating device includes a presence detection unit, in particular a PIR motion detector and / or a radar motion detector and / or an ultrasonic motion detector.

[0040] In a further embodiment, the operating device comprises a sensor unit, in particular a temperature sensor and / or a humidity sensor and / or a VOC sensor. Depending on the data acquired by the sensor unit, an electrical device of the building can be controlled and / or regulated, in particular by controlling and / or regulating at least one parameter of the electrical device of the building.

[0041] In an additional variant, an electrical device of the building can be controlled and / or regulated by the operating device using the communication unit, i.e., data for the control and / or regulation of the electrical device of the building can be sent and / or received.

[0042] In a supplementary embodiment, at least one parameter of an electrical device, in particular an actuator of a heating circuit of an underfloor heating system, can be controlled and / or regulated depending on the data acquired by the at least one component of the operating device, for example, a sensor unit, in particular a temperature sensor. For this purpose, the acquired data can be transferred to the control and / or regulation unit, and depending on this data, the at least one parameter of the electrical device can be controlled and / or regulated by the control and / or regulation unit by transmitting control signals and / or control data to the electrical device via the communication unit.

[0043] In particular, the functional relationship between the data acquired by the at least one component, in particular sensor unit and / or presence detection unit, of the operating device and the at least one parameter of the electrical device is changeable, in particular by means of the transmission of data to the control and / or regulation unit, in particular with a smartphone and / or an external computer and / or a central unit of a smart home system.

[0044] In a supplementary variant, at least one optical projection unit with an actuator, in particular an electric motor, is automatically movable in the secondary direction of movement as a secondary rotational movement, in particular controllable and / or regulating with the control and / or regulation unit.

[0045] In another embodiment, each optical projection unit comprises a sub-housing.

[0046] Advantageously, in each optical projection unit, in particular within a sub-housing of each optical projection unit, an integrated circuit (IC) for controlling the mirrors and / or a video processor and / or an integrated circuit for controlling the actuators for moving the at least one mirror and / or an integrated circuit for power management is installed, in particular in and / or on a printed circuit board within the sub-housing of each optical projection unit. Brief description of the drawings

[0047] An embodiment of the invention is described in more detail below with reference to the accompanying drawings. It shows: Fig. 1. A perspective side view of an operating device integrated into a wall in a resting position. Fig. 2 a front view of the operating device integrated into the wall according to Fig. 1, Fig. 3 a perspective side view of the operating device integrated into the wall according to Fig. 1 in an operating position with first rotational positions of disc-shaped holding elements with projection units, Fig. 4 a perspective side view of the operating device integrated into the wall according to Fig. 1 in an operating position with second rotation positions of disc-shaped holding elements with projection units, Fig. 5 a perspective view of a flush-mounted box as the housing of the operating device, Fig. 6 a longitudinal section of the operating device integrated into the wall according to Fig. 3 in an operating position, Fig. 7 a perspective view of part of the projection unit and Fig. 8 a perspective view of the projection unit with only a partial representation of part of the sub-housing of the projection unit.

[0048] An operating device 1, acting as a human-machine interface 1, serves to operate electrical devices in a building, for example, with a smart home system. The electrical devices include, for example, a ceiling light, an electric actuator for controlling the heating circuit of an underfloor heating system, a surveillance camera, an electric door opener, and / or an anti-theft alarm system. The operating device 1 comprises a housing 11 ( Fig. 5 and Fig. 6) with a rear back wall 16 and a cylindrical side wall 17. The back wall 16 and the side wall 17 form a flush-mounted box 15 for integration or installation in a wall 12 of a building. For this purpose, a recess 14 is formed in the wall 12 in which the flush-mounted box 15 is fully installed. The flush-mounted box 15, as the housing 11, includes means 26 for fastening the housing 11, as the flush-mounted box 15, in the wall 12. For this purpose, two tabs 27 with openings 28 are formed on the flush-mounted box 15, so that the flush-mounted box 15 can be fastened in the recess 14 with nails in the openings 28. Additionally, the flush-mounted box 15 comprises 26 positive-locking elements 29 as projections 30 on the outside of the side wall 17 for a positive-locking fastening of the flush-mounted box 15 in the recess 14 with plaster after the plaster has hardened. In the Fig. In the embodiment shown in Figure 5, the flush-mounted box 15 comprises two means 26, namely the tab 27 and the positive locking elements 29. Typically, only one type of means 26 is provided on the flush-mounted box 15, i.e., only positive locking elements 29 or the tabs 27. The flush-mounted box 15 has two openings 22 for inserting a power cable, in particular a power cable in a conduit, especially a corrugated conduit as an installation pipe, into the interior space bounded by the flush-mounted box 15. At the front end of the side wall 17, facing away from the rear wall 16, a collar extending in a radial direction 59 is formed, which faces outwards ( Fig. 5), inwards ( Fig. 6) or extend outwards and inwards (not shown).

[0049] The operating device 1 incorporates a power supply unit 3 for providing it with electrical energy. The power supply unit 3 is, for example, configured with two electrical contact elements for connecting the operating device 1 to a 230 V AC mains supply in the building. Alternatively or additionally, the power supply unit 3 is configured with a battery, in particular a rechargeable battery, so that the operating device 1 can also be operated portably without being connected to a 230 V AC mains supply. In a further embodiment not shown, the operating device 1 may not be integrated into a recess 14 in a wall 12, but can be portably attached and / or placed at various locations within a building.

[0050] A communication unit 2 is used for sending and / or receiving data wirelessly and / or via wired connections. For this purpose, the communication unit 2 incorporates an antenna and / or corresponding electrical contact elements. Data transmission for simple control signals is carried out using a bus system, for example, KNX, or wirelessly, in particular Zigbee, Z-Wave, Matter, 868 MHz, or Bluetooth. Larger amounts of data, for example, from a surveillance camera, are transmitted to the control device 1 via a network connection, preferably WLAN, LAN, WAN, P2P, Thread, Bluetooth, 868 MHz, Matter, Zigbee, or Z-Wave. The communication unit 2 can also include a simple switch, for example, a mechanical switch or a semiconductor switch, for directly switching an electrical device, such as a ceiling light, on and off.

[0051] A control and / or regulation unit 10 serves to control and / or regulate electrical devices of the building and / or components 2, 3, 4, 9, 36, 53, 55, 61, 62, 63 and / or 65 of the operating device 1. The control and / or regulation unit 10 comprises a computer, for example, a microcontroller. Communication is possible via an app on a smartphone or an external computer and a wireless connection, for example, via Bluetooth or WLAN, Thread, Bluetooth, 868 MHz, Matter, Zigbee, Z-Wave, between the smartphone or computer on the one hand and the communication unit 2 of the operating device 1 on the other.

[0052] Optionally, an electrical device, such as a ceiling light, an electric motor for a blind and / or an actuator of a heating circuit of an underfloor heating system, and / or components 3, 4, 9, 10, 36, 53, 55, 61, 62, 63, 65 of the operating device 1 can be controlled and / or regulated and / or programmed using the touchscreen of the smartphone.

[0053] Furthermore, communication with a central unit (not shown) of the smart home system is also possible via a wired and / or wireless connection. This allows the optical projection unit 4 to be switched on and off using a smartphone or the central unit, and enables an optical projection unit 4 to be assigned to an electrical device in the building. For example, images from a surveillance camera assigned to the smartphone can be projected onto a projection surface 50 using an optical projection unit 4 selected via the smartphone.

[0054] Furthermore, a specific electrical device in the building can be assigned to each sensor button 25 using the smartphone and / or the central unit of the Smart Home System, for example a ceiling light in a room or an electrical actuator for a specific heating circuit of the underfloor heating.

[0055] According to further training, the operating device 1 can be used to control electrical devices, in particular devices of the smart home system, preferably smart home devices. Examples of electrical devices include a ceiling light, an electric actuator for controlling the heating circuit of an underfloor heating system, a surveillance camera, an electric door opener, and / or an anti-theft alarm system.

[0056] According to further training, information from electrical devices, in particular devices of the Smart Home System, preferably Smart Home devices, can be reproduced, in particular displayed, by means of the operating device 1.

[0057] The front end of the flush-mounted box 15, forming the housing 11 of the operating device 1, is closable by a cover plate 23, preferably transparent. The cover plate 23 and further components 3, 4, 9, 10, 23, 24, 38, 43, 47, 61, 62, 63, 65 of the operating device 1 are movable by a primary mechanism 31 in a primary direction of movement 32, namely a translational movement between a retracted rest position and an extended operating position. A bearing rod 19 is attached centrally to the substantially circular rear wall 16 of the flush-mounted box 15, perpendicular to the imaginary plane (not shown) spanned by the rear wall 16. The bearing rod 19 has a longitudinal axis 21. Teeth 20 are formed successively in a row along the longitudinal axis 21 on the bearing rod 19. Coaxial and concentric to the bearing rod 19, the operating device 1 comprises a cylindrical sliding bearing bushing 47.The cylindrical sliding bearing bushing 47 has a radial outer surface 48 and a radial inner surface 49. The radial inner surface 49 defines a cross-section perpendicular to the plane of the drawing. Fig. 6 circular interior space 64.

[0058] Within the interior 64, a gear 34, a transmission 35, in particular a reduction gear 35, and an electric motor 36, in particular a servo motor 36, are arranged. The teeth of the gear 34 mesh with the teeth 20 of the bearing rod 19. The electric motor 36 drives the gear 34 via the transmission 35, so that, with a rotational movement of the gear 34 and the positive engagement between the teeth of the gear 34 and the teeth 20 of the bearing rod 19, the sliding bearing bushing 47 together with the components attached to it, in particular the cover plate 23, the disc-shaped retaining elements 43 with integrated optical projection units 4, and the end disk 44, are movable with a translational movement in the primary direction of movement 32 between a retracted rest position and an extended operating position.The end plate 44 does not have an integrated optical projection unit 4, because it merely serves as a spacer to the cover plate 23. In the retracted rest position, the cover plate 23 rests on the axial end of the flush-mounted box 15 and closes off the interior of the flush-mounted box 15 (. Fig. 1 and Fig. 2) In the extended operating position ( Fig. 3, Fig. 4 and Fig. 6) The cover plate 23 and the four retaining elements 43 with integrated projection units 4 are arranged completely outside the flush-mounted box 15.

[0059] For the support of the movable sliding bearing bushing 47, bearing rollers 37 are indirectly attached to the radial inner surface 49 of the sliding bearing bushing 47. These rollers roll on the underside of the bearing rod 19, opposite the gear 34 on the upper surface. Additionally, a bearing ring 38 is attached to the radial outer surface 48 of the sliding bearing bushing 47. The bearing ring 38 faces the rear wall 16 in the axial direction 58 after the last disc-shaped retaining element 43. The bearing ring 38 has a radial outer surface 39 and rests on a radial inner surface 18 of the side wall 17 of the flush-mounted box 15, thereby forming a sliding bearing 33 between the radial inner surface 18 of the side wall 17 and the radial outer surface 39 of the bearing ring 38.

[0060] Additionally, the radial inner surface 18 of the side wall 17 and the radial outer surface 39 of the bearing ring 38 can have a positive locking element and a counter-locking element (not shown) that interlock, for example as a tongue-and-groove connection (not shown), to form an anti-rotation device for the sliding bearing bushing 47 with an axis of rotation 42 as the longitudinal axis 21. The positive locking element and counter-locking element thus block rotational movement of the sliding bearing bushing 47 and the cover plate 23 rigidly and / or immovably attached to it about an axis of rotation 42, which corresponds to the longitudinal axis 21 of the bearing bar. The collar on the side wall 17, extending radially inwards 59, also acts as an axial stop ( Fig. 6) for the bearing ring 38 and thus for the sliding bearing bushing 47 with retaining elements 43 due to a connection in the axial direction 58 between the bearing ring 38 and the sliding bearing bushing 47, in particular a positive locking and / or material locking connection.

[0061] A disc-shaped sensor module 24 with sensor buttons 25 is integrated into the cover plate 23 in the axial end region facing away from the rear wall 16. The sensor buttons 25 are designed as mechanical buttons and / or, for example, as a capacitive button 25. Alternatively, the sensor module 24 can also include a touchscreen (not shown). The sensor module 24 thus forms a detection unit 9 for detecting commands or inputs from a user for the operating device 1, i.e., for detecting the information transmitted by the user to the operating device 1.

[0062] Each disc-shaped holding element 43 has an optical projection unit 4 built in and integrated ( Fig. 6, Fig. 7 and Fig. 8) Due to the cross-section in Fig. 6 are in Fig. 6 not all four optional optical projection units 4 are visible.

[0063] The disc-shaped retaining elements 43 have a radial inner surface 45 and a radial outer surface 46. The radial inner surfaces 45 of the disc-shaped retaining elements 43 rest on the radial outer surface 48 of the cylindrical sliding bearing bushing 47, so that a sliding bearing is formed between the radial inner surfaces 45 of the disc-shaped retaining elements 43 and the radial outer surface 48 of the sliding bearing bushing 47. With this sliding bearing, the disc-shaped retaining elements 43, together with the optical projection units 4, are movably mounted in a secondary direction of movement 41, namely a tangential direction 60 with a rotational movement about the axis of rotation 42.A secondary mechanism 40 for the secondary direction of movement 41 of the retaining elements 43 with the optical projection units 4 is thus formed by the bearing as the sliding bearing between the radial outer side 48 of the sliding bearing bushing 47 and the radial inner sides of the disc-shaped retaining elements 43.

[0064] The optical projection unit 4 includes an exit aperture 5 for directing a deflected laser beam 56. The exit apertures 5 also form the radial outer surface 46 of the disc-shaped retaining elements 43, because the optical projection unit 4 is an integral part of the disc-shaped retaining elements 43. A radial direction 59 is oriented perpendicular to the longitudinal axis 21 of the support rod 19 and perpendicular to the axis of rotation 42 of the secondary direction of movement 41. The exit apertures 5 are formed in the radial direction 59 at an end region or an end of the optical projection units 4.

[0065] The optical projection unit 4 incorporates a light source, namely a laser, in particular an RGB laser (not shown). The RGB laser is configured, for example, as a combination of three lasers, one for each color. The RGB laser emits light as red light with a wavelength of approximately 635–640 nm, green light with a wavelength of approximately 515–525 nm, and blue light with a wavelength of approximately 450–460 nm. The light emitted by the laser is deflected by optical elements 51, namely a first mirror 52 and a second mirror 54 ( Fig. 7) The first and second mirrors 52, 54 are designed as MEMS mirrors 52, 54. The first mirror 52 is movable about a first pivot axis by a first actuator 53, and the second mirror 54 is movable about a second pivot axis by a second actuator 55. The two mirrors 52, 54 are hermetically encapsulated and thus protected from negative environmental influences such as moisture or dirt. The actuators 53, 55 operate on an electrodynamic principle.

[0066] The first pivot axis of the first mirror 52 and the second pivot axis of the second mirror 54 are essentially aligned perpendicular to each other, in particular with a deviation of less than 30°, 20°, 10°. This allows the laser beam 56 to be deflected within a spatial laser beam area 57 and directed onto the projection surface 50 ( Fig. 6).

[0067] Each optical projection unit 4 comprises a sub-housing 6. A printed circuit board 7 with conductor tracks and integrated circuits (ICs) is installed in the sub-housing 6. Fig. 8) Integrated circuits (ICs) for controlling the mirrors 52, 54, a video processor, an integrated circuit for controlling the actuators 53, 55 and an integrated circuit for power management are installed in the optical projection unit 4, in particular in the circuit board 7.

[0068] Within the sub-housing 6 are installed the light source, namely the laser, the two mirrors 52, 54, and the two actuators 53, 55 (drives 53, 55). An image, for example, a pictogram, a virtual keyboard, and / or an image from a surveillance camera, is projected onto a projection surface 50 line by line or row by row using the dynamic modulation of the laser beam 56, without optical focusing. No optical focusing or calibration is necessary, even if the distance between the optical projection unit 4 and the projection surface 50 varies. The operating device 1 comprises four disc-shaped holding elements 43 with integrated optical projection units 4. Preferably, the operating device 1 has four optical projection units 4, so that four independent projection surfaces 50 with four independent laser beam areas 57 can be projected.

[0069] The geometry of the radial outer surface 46 of the disc-shaped retaining elements 45 has a different radial distance in the radial direction 59 to the axis of rotation 42, so that local depressions and local elevations form on the radial outer surface 46 of the disc-shaped retaining elements 43 for the manual application by hand, i.e. with the fingers, of a force as a torque for the rotational movement of the retaining elements 43 with the optical projection units 4.

[0070] The secondary direction of movement 41, a rotational movement about the axis of rotation 42, allows the projection surface 50 to be directed onto different surfaces in the building, i.e., onto different areas on a floor 13 and / or a ceiling (not shown) of the building. Optionally, the disc-shaped retaining elements 43, equipped with actuators (not shown) acting as rotational actuators (not shown), can be moved automatically and independently of one another in the secondary direction of movement 41.

[0071] Each optical projection unit 4 incorporates, in particular, light-sensitive electronic components (not shown), namely photodiodes. At least three photodiodes are incorporated: one for red light, one for green light, and one for blue light. Optionally, two photodiodes for red light are incorporated. The light from the laser reflected from the projection surface 50 is detected by the photodiodes, allowing the projection surface 50 to be scanned and recorded pixel by pixel by detecting and evaluating changes in the reflected light. The optical projection unit 4 thus also functions as a microscanner 65, scanner 65, or MEMS scanner 65 (microelectromechanical systems mirror scanner 65) for the optical acquisition of the projection surface 50 as an additional reflective surface 50.For example, if a virtual keyboard is projected onto the projection surface 50 using the modulated laser beam 56, elements for transmitting information to the control device 1, such as a person's fingers, hand, and / or foot, or a pointing stick, can also be detected on this virtual keyboard using the microscanner 65. The finger, hand, or foot on the virtual keyboard can transmit a command or input to the control device 1, for example, to switch a lighting device on or off or to dim it. The optical projection unit 4 with integrated microscanner 65 and the projection surface 50 thus also function as a detection unit 9.

[0072] A vibration unit 61 is additionally installed in the cover plate 23 for haptic feedback on the cover plate 23 of the operating device 1.

[0073] Additionally, a presence detection unit 62 is integrated into the cover plate 23. The presence detection unit 62 optically detects or records whether a person is near the operating device 1, in particular in a room containing the operating device 1. Depending on the detected presence, parameters of an electrical device can be controlled and / or regulated; for example, if no presence is detected in the room containing the operating device 1, the room temperature is lowered by 2 °C and the projection of images onto the projection surface 50 is stopped. The presence detection unit 62 is designed, for example, as a PIR motion detector, a radar motion detector, and / or an ultrasonic motion detector.

[0074] Additionally, the cover plate 23 of the control device 1 includes a sensor unit 63 with a temperature sensor and / or humidity sensor and / or VOC sensor (Volatile Organic Compound sensor). The temperature sensor, for example, detects the temperature in the room with the control device 1, and depending on the temperature, the control device 1 controls an electric actuator for the underfloor heating circuit of that room or a smart radiator thermostat for a radiator in the heating system for that room. The functional relationship between the temperature detected by the temperature sensor and the position of a valve in a heating circuit can also be changed using a smartphone app. Depending on the data from the VOC sensor, i.e., the detected odors, the ventilation in a room is automatically controlled and / or regulated.

[0075] Furthermore, the operating device 1, in particular the cover plate 23, includes a person recognition unit (not shown). The person recognition unit is, for example, designed as a camera or wirelessly captures the ID of a smartphone or computer, such as a tablet, and can thereby identify a specific person. Specific profiles or parameters of the electrical devices can be assigned to this person. This makes it possible, for example, to control and / or regulate a first temperature in a room when a specific first person is detected, and a second temperature when a specific second person is detected, when each person is present in the room. Depending on the identified and detected persons, specific images from surveillance cameras can also be projected onto the projection surface 50 using the operating device 1.

[0076] Overall, the operating device 1 according to the invention offers significant advantages as a human-machine interface. The operating device 1, with its optical projection units 4 with integrated microscanners 65, enables the creation of any desired image on the projection surface 50 using the modulated laser beam 56. The projection surfaces 50 can be selected arbitrarily within a room by means of the rotational movement of the disc-shaped holding elements 43. This is a significant advantage because the user of the operating device 1 can thus individually select and determine the position of the projection surface 50 within a room on the wall 12, the floor 13, and / or the ceiling.In addition, the images from at least two optical projection units 4 can be mapped at least partially, in particular completely, overlapping onto a projection surface 50, so that the brightness of these overlapping at least two laser beam areas 57 is increased as at least two overlapping projection surfaces 50. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2008 056 409 A1

[0003] DE 10 2014 114 320 B4

[0004] DE 10 2014 104 394 B4

[0005]

Claims

[1] Operating device (1) as a human-machine interface (1) for operating an electrical device of a building, in particular a device of a smart home system, comprising: - a case (11, 15), - a communication unit (2) for sending and / or receiving data, - a power supply unit (3) for supplying the operating device with electrical energy, - an optical projection unit (4) with a light source for projecting information onto a projection surface (50), in particular the surface (50) of a wall (12) and / or a floor (13) and / or a ceiling of the building, with projected light, - a primary mechanism (31) for a primary translational movement of the optical projection unit in a primary direction of movement (32), such that the optical projection unit (4) is movable between a retracted rest position and an extended operating position, - a recording unit (9) for recording the information transmitted by a user to the operating device (1), characterized by , that the operating device (1) comprises a secondary mechanism (40) for a secondary rotational movement of the optical projection unit (4) in a secondary direction of movement (41), so that the optical projection unit (4) is movable between different rotational positions. [2] Operating device (1) according to claim 1, characterized by , that the primary direction of motion (31) of the translational motion and the axis of rotation (42) of the secondary rotational motion are essentially parallel to each other. [3] Operating device (1) according to claim 1 or 2, characterized by , that the operating device (1) comprises several optical projection units (4) for projecting information onto different projection surfaces (50) and / or onto at least one identical projection surface (50). [4] Operating device (1) according to claim 3, characterized by that the optical projection units (4), in particular all optical projection units (4), are movable according to one or more of the preceding claims with the primary mechanism (31) and secondary mechanism (40). [5] Operating device (1) according to claim 3 or 4, characterized by , that the optical projection units (4) are independently movable with the secondary rotational movement in the secondary direction of movement (41). [6] Operating device (1) according to one or more of claims 3 to 5, characterized by , that the rotation axes (42) of the secondary rotational movements of the optical projection units (4), in particular of all optical projection units (4), are essentially identical. [7] Control device (1) according to one or more of the preceding claims, characterized by, that at least one optical projection unit (4), in particular all optical projection units (4), is or are integrated into one disc-shaped holding element (43). [8] Operating device (1) according to claim 7, characterized by , that the geometric centers of gravity of the disc-shaped retaining elements (43) lie essentially in the axis of rotation (42) of the secondary rotational motion. [9] Operating device (1) according to claim 7 or 8, characterized by , that the disc-shaped retaining elements (43) are arranged successively in a row in the direction of the primary direction of movement (32). [10] Operating device (1) according to one or more of the preceding claims, characterized by, that the at least one optical projection unit (4) comprises a scanner (65) for optical scanning and / or detection of an area on the at least one projection surface (50) with the light reflected on the at least one projection surface (50), such that the at least one optical projection unit (4) additionally functions as at least one detection unit (9). [11] Operating device (1) according to claim 10, characterized by , that the scanner (65) comprises at least one light-sensitive electronic component, in particular at least one photodiode, for detecting the light emitted and reflected by the light source. [12] Control device (1) according to one or more of the preceding claims, characterized by that the light source is formed by a laser, in particular an RGB color laser. [13] Control device (1) according to one or more of the preceding claims, characterized by, that the detection unit (9) is a mechanical button and / or a sensor button (25), in particular a capacitive button (25) and / or a piezo button and / or a touchscreen, located on an outside of the operating device (1). [14] Control device (1) according to one or more of the preceding claims, characterized by , that the operating device comprises at least one means (26, 27, 28, 29, 30), in particular at least partially integrated into the housing (11), for fastening the operating device (1) to and / or on a wall (12) and / or a floor (13) and / or a ceiling of the building. [15] Control device (1) according to one or more of the preceding claims, characterized by, that the operating device (1) comprises a control and / or regulation unit (10) which is connected to the detection unit (9), the communication unit (2) and the at least one optical projection module (4) by means of data transmission, in particular data lines, for the control and / or regulation of the electrical equipment of the building.

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