EP3725424B1 - Dispositif de lecture des signaux haptiques et des signaux audio - Google Patents

Dispositif de lecture des signaux haptiques et des signaux audio Download PDF

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Publication number
EP3725424B1
EP3725424B1 EP20168764.7A EP20168764A EP3725424B1 EP 3725424 B1 EP3725424 B1 EP 3725424B1 EP 20168764 A EP20168764 A EP 20168764A EP 3725424 B1 EP3725424 B1 EP 3725424B1
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EP
European Patent Office
Prior art keywords
plate
coil
magnet system
membrane
signal
Prior art date
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EP20168764.7A
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German (de)
English (en)
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EP3725424A1 (fr
Inventor
Michael Reindl
Manfred STEINBACHER
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BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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Publication of EP3725424A1 publication Critical patent/EP3725424A1/fr
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/02—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy
    • B06B1/04—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism
    • B06B1/045—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of electrical energy operating with electromagnetism using vibrating magnet, armature or coil system

Definitions

  • the invention relates to the reproduction of audio signals and haptic signals.
  • the invention relates to a device that makes it possible to output both audio signals and haptic signals in an efficient manner.
  • a home appliance can have a touch-sensitive screen as part of a user interface.
  • One or more virtual controls e.g., buttons, switches, knobs, etc.
  • haptic and/or acoustic feedback is provided parallel to the actuation of the virtual control element (e.g. to simulate the clicking noise and/or click feeling of a switch).
  • Such haptic feedback can be effected, for example, by means of a structure-borne sound transducer.
  • Audio signals typically cannot be reproduced with optimum quality using a structure-borne sound transducer.
  • Such devices are for example in the EP 1 063 020 A1 , U.S. 6,487,300 B1 , U.S. 10,216,231 B1 or the U.S. 2016/296849 A9 disclosed.
  • the present document deals with the technical task of providing a cost-effective, space-efficient and/or weight-efficient device for the reproduction of haptic signals and audio signals.
  • an apparatus for reproducing a haptic signal and/or an audio signal on a disc is described.
  • the panel can be part of a user interface of a device, in particular a household appliance.
  • the panel may have a size of 10 cm x 5 cm or more.
  • the plate can be rigid.
  • a touch-sensitive screen can be arranged on a front side (facing a user) of the panel.
  • the device described in this document can be arranged on the rear side of the panel (facing away from the user).
  • the device described in this document may have the shape of a circular cylinder and/or a typical loudspeaker.
  • the diameter of the device may be between 2 cm and 8 cm.
  • the device may include one or more fasteners configured to attach the device to the panel.
  • the device may be attached to the panel (particularly to the back of the panel) via one or more fasteners.
  • the one or more fastening elements can be screwed and/or glued to the plate.
  • the one or more fasteners may each be formed as a rod that is perpendicular to the panel.
  • the one or more fastening elements can be designed and/or used to connect a housing, in particular a (rear) housing wall, of the device to the panel.
  • the device includes a coil attached (eg, glued) to the plate.
  • a coil carrier of the coil can be attached to the plate.
  • the coil can then be arranged at the end of the coil carrier facing away from the plate.
  • the coil may be in the form of a hollow cylinder.
  • the coil can have a wound wire made of an electrically conductive material (in particular made of a metal such as copper).
  • the coil can be designed to generate a magnetic field in response to a coil current through the coil.
  • the coil can be connected to the plate in such a way that movement of the coil sets the plate in motion.
  • the device also includes a magnet system that is set up to generate a magnetic field into which the coil is immersed.
  • the magnet system may include a first pole (e.g. a magnetic north pole) enclosing a second pole (e.g. a magnetic south pole) such that a (constant and/or permanent) magnetic field is generated in an annular cavity between the first pole and the second pole becomes.
  • the coil can be designed to dip into the annular cavity between the two poles (and thus into the magnetic field generated by the magnet system).
  • the device also includes a membrane which is attached to the plate (on the one hand) and to the magnet system (on the other hand) in such a way that the membrane is excited to vibrate by a movement of the magnet system.
  • the membrane may be indirectly attached to the panel via the one or more attachment members.
  • the membrane is cone-shaped and, according to the invention, encloses the coil.
  • the membrane can consist of a flexible material (e.g. of paper).
  • the membrane can preferably be a loudspeaker membrane.
  • a device with a movably mounted magnet system is thus described, which can be used to cause a membrane to oscillate.
  • the movably mounted magnet system can be used to cause the membrane to oscillate for the reproduction of an audio signal (e.g. a music and/or speech signal).
  • the device comprises a coil attached to a (fixed and/or rigid) plate, which coil interacts with the magnet system via one or more magnetic fields.
  • a (constant and/or permanent) magnetic field can be generated by the magnetic field.
  • a time-variable magnetic field can be generated by a coil current through the coil. The interaction of the two magnetic fields can cause a relative movement between the coil and the magnet system.
  • the coil attached to the plate can be used to excite the plate to (low-frequency) movements in order to emit a haptic signal via the plate.
  • the membrane excited by the magnetic field can be used to output an audio signal.
  • An efficient device which, using only one membrane, only one coil and only one magnet system, is set up to output both a haptic signal and an audio signal in an efficient manner.
  • the device can include a control unit that is set up to generate an (electrical) control signal for the playback of the haptic signal and/or the audio signal.
  • a first signal for the haptic signal and a second signal for an audio signal can be superimposed in order to provide a combined or superimposed control signal.
  • control unit can be set up to bring about a coil current dependent on the control signal through the coil in order to bring about the reproduction of the haptic signal and/or the audio signal.
  • the coil current can produce a magnetic field on the coil that corresponds to the control signal and interacts with the magnetic field of the magnet system.
  • the magnet system can be set in motion to excite the diaphragm to vibrate, thereby causing the audio signal to be reproduced.
  • a (low-frequency) movement of the coil can also be brought about (e.g. due to the inertia of the magnet system) in order to set the plate in motion or vibrate to reproduce the haptic signal and/or to reproduce the low-frequency components of the audio signal.
  • a high-quality reproduction of haptic signals and audio signals is thus made possible.
  • the device can be designed in such a way that a large part and/or more than 50% of the energy of the component of the drive signal which is intended for the reproduction of the haptic signal (ie the first signal) is transmitted to the plate via the coil, to make the plate vibrate.
  • the device can be designed in such a way that a large part and/or more than 50% of the energy of the component of the control signal that is provided for playing back the audio signal (ie the second signal) is transmitted to the membrane via vibrations of the magnet system to excite the membrane to vibrate. In this way, a high reproduction quality can be brought about both for haptic signals and for audio signals in an efficient manner.
  • the device includes a first damping element (e.g. a damping ring) by which the coil is attached to the plate.
  • the coil carrier can be connected to the plate via the first damping element.
  • the first damping element can be arranged at the end of the coil carrier facing the plate, while the coil is arranged at the other end of the coil carrier.
  • the coil carrier can be designed, for example, as a (hollow) cylinder and/or as a tube.
  • the first damping element has a low-pass characteristic.
  • the first damping element is set up to transmit frequency components of the control signal below a cut-off frequency to the plate and/or to decouple frequency components of the control signal above the cut-off frequency at least partially (e.g. with a damping factor of 90% or more) from the plate.
  • the cut-off frequency can be 100Hz or less, or 50Hz or less.
  • a first damping element can reliably prevent high-frequency components of an audio signal from being transmitted via the coil to the disk (and being reproduced via the disk in a distorted manner). A high-quality audio reproduction can thus be effected.
  • the device can have a housing wall which is designed to cover the device on the rear side of the membrane (facing away from the plate). By providing a rear housing wall, an acoustic short circuit of the membrane can be avoided.
  • the housing wall can be connected to the plate via the one or more (rod-shaped) fastening elements.
  • the device can include a second damping element, via which the magnet system is attached to the housing wall.
  • the second damping element can have a low-pass characteristic.
  • the second damping element can be set up to transmit frequency components of the control signal below the cut-off frequency via the housing wall and via the one or more fastening elements to the plate, and/or frequency components of the To decouple drive signal above the cut-off frequency at least partially from the plate.
  • a stable movement of the magnet system can be made possible by providing a second damping element (for mounting the magnet system).
  • a second damping element with a low-pass characteristic it is possible to reliably prevent high-frequency components of an audio signal from being transmitted to the disk. A high-quality reproduction of audio signals can thus be made possible.
  • the device may include a spider (such as used in a loudspeaker) arranged to connect the coil to the magnet system.
  • the centering spider can be firmly connected to the coil or the coil carrier on one side and firmly to the magnet system on the other side.
  • the use of a centering spider can cause the coil to move in a defined manner within the magnetic field generated by the magnet system. A reliable reproduction of haptic signals and/or audio signals can thus be made possible.
  • the magnet system can be movably attached to the plate via the membrane in such a way that the magnet system can oscillate along a direction of oscillation, which preferably runs perpendicular to the plate.
  • the base of the conical or cone-shaped membrane can be attached (directly or indirectly) to the plate.
  • the end of the membrane opposite the base area can be attached to the magnet system.
  • the coil can be set up to generate a magnetic field which is dependent on the coil current and varies according to the drive signal, causing the magnet system to move along the vibration direction (eg essentially perpendicular to the plate).
  • the vibration direction eg essentially perpendicular to the plate.
  • the movement of the magnet system can stimulate the membrane to reproduce an audio signal.
  • the device has a membrane ring which is firmly connected to the plate with the one or more fastening elements.
  • the membrane ring can have a diameter that corresponds to the diameter of the base area of the membrane.
  • the diaphragm can then be attached to the diaphragm ring (and thus indirectly attached to the plate via the diaphragm ring).
  • the membrane can be attached to the membrane ring via a flexible bead (which comprises, for example, rubber and/or foam). Reliable movement of the membrane can thus be made possible.
  • the membrane ring is arranged at a distance from the plate and from the magnet system between the plate and the magnet system. As a result, there is a gap between the cone-shaped membrane and the plate, from which the sound waves of the reproduced audio signal can escape. By providing such a gap, the quality of the audio reproduction can be further increased.
  • a user interface for a device (in particular for a household appliance) is described.
  • the user interface comprises a panel (e.g. made of plastic) with a touch-sensitive screen on which a virtual control element (e.g. a virtual button) can be displayed.
  • a virtual control element e.g. a virtual button
  • the user interface comprises a device arranged on the plate for playing back a haptic signal and/or an audio signal.
  • the device can be designed as described in this document.
  • the user interface can include a control unit that is set up to detect that the virtual operating element has been actuated by a user.
  • the controller may further be configured, in response thereto, to cause the device to render a haptic signal on the panel to provide haptic feedback to the user in relation to actuation of the virtual control.
  • the control unit can be set up to detect that an audio signal (eg a speech signal and/or a music signal) is to be output. In response, the device can be caused to play back the audio signal.
  • an audio signal eg a speech signal and/or a music signal
  • a domestic appliance which comprises the user interface and/or device described in this document.
  • Exemplary household appliances are: a dishwasher, a washing machine, a stove, an oven, a refrigerator, a freezer, a dryer, etc.
  • FIG. 1a an exemplary home appliance 100 with a user interface 110.
  • the user interface 110 includes a touch-sensitive screen 113 on which one or more virtual operating elements 117 can be provided.
  • the screen 113 is typically arranged on a front panel 114 of the domestic appliance 100 or the user interface 110 .
  • a user of the domestic appliance 100 can operate an operating element 117 displayed on the screen 113 .
  • the actuation of the operating element 117 can be detected by a control unit 111 of the user interface 110 .
  • an actuator 112 for example a structure-borne noise transducer, can be prompted to emit a haptic and/or acoustic signal in order to give the user haptic and/or acoustic feedback about the actuation of the operating element 117, see above the comfort and the reliability of the operation of a household appliance 110 can be increased.
  • Fig. 1b shows the front panel 114 of a user interface 110 in a side view.
  • the actuator 112 is typically arranged behind the front panel 114 and (possibly fixedly) connected to the rear of the front panel 114 in order to excite the front panel 114 to oscillate for a haptic and/or acoustic signal.
  • the control unit 111 can be set up to determine that an audio signal should be output.
  • the audio signal may include a voice output (e.g., for outputting a voice instruction and/or for outputting information relating to the home appliance 110).
  • the control unit 111 can also be set up to cause the actuator 112 to output the audio signal.
  • the quality of the audio reproduction is typically not optimal, particularly when using a structure-borne noise converter and/or an exciter.
  • a separate speaker can be provided for audio playback.
  • the provision of an additional loudspeaker leads to additional costs, increased weight and the need for additional installation space.
  • a component or device 112 which can be used on the one hand to generate haptic feedback and on the other hand to output an audio signal with good sound quality.
  • the component 112 (also referred to as the device in this document) can combine the function of a structure-borne sound converter and a loudspeaker in a single component.
  • a component 112 is described that can be viewed as a combined structure-borne sound converter with loudspeaker functionality.
  • the component 112 can be constructed like an electrodynamic loudspeaker, with a magnet system 204, with a voice coil 205 and with a loudspeaker membrane 202.
  • the voice coil carrier 215 of the coil 205 can be pulled out over the membrane 202 .
  • the voice coil bobbin 215 can be mechanically fixed be connected to the front panel 114 and can thus fulfill the function of an exciter or structure-borne sound converter.
  • the connection to the front panel 114 can optionally take place via an acoustic damping element 203 with a low-pass characteristic.
  • relatively low-frequency vibrations can be transmitted to the front panel 114 in order to output a haptic signal.
  • the voice coil carrier 215 can be connected to the magnet system 204 via a centering spider 207 .
  • the magnet system 204 can be suspended in an oscillating manner by means of the centering spider 207, so that the magnet system 204 can oscillate in accordance with an input signal (in particular in accordance with an audio signal).
  • there is no oscillation of the coil 205 (as in a conventional loudspeaker).
  • the membrane 202 can be firmly connected (in particular glued) to the magnet system 204 so that the vibrations of the magnet system 204 are transmitted to the membrane 202 for the reproduction of the audio signal.
  • the magnet system 204 is typically static and the diaphragm 202 is bonded to the moving voice coil 205. Furthermore, in a conventional loudspeaker, the voice coil 205 is typically movably mounted via the spider 207 and moves back and forth like a piston in accordance with the audio signal.
  • the coil 205 and the outer clamping of the membrane 202 are preferably rigidly connected to the operating terminal or to the front panel 114 via the housing 206 of the component 112 (in particular via the fastening elements 201). With this arrangement, the magnet system 204, and hence the diaphragm 202, will vibrate in response to the input signal (causing a coil current to flow through the coil 205).
  • a damping ring 203 between the coil carrier 215 and the operator terminal 114 can be used to keep higher audio (especially speech and music) frequencies away from the operator terminal 114 or to decouple them.
  • the damping ring 203 can be designed in such a way that relatively low haptic frequencies or frequencies in the low-frequency range can pass through, and thus onto the operating terminal 114 be transmitted.
  • the damping ring 203 with low-pass character can thus be used to reduce, in particular to minimize, the non-linear behavior of the operating terminal 114 in the acoustic emission with respect to a frequency band in which the human ear has a relatively high (in particular the greatest) sensitivity.
  • the damping ring 203 can cause the low frequencies of the haptics to be transmitted to the operating terminal 114 and the low-frequency range to be emitted via the operating terminal 114 during audio playback.
  • the bass reproduction can thus take place via the coil carrier 215 and via the operating terminal 114.
  • the operating terminal 114 can thus be used as a kind of “subwoofer” for audio playback.
  • the higher frequencies can be reproduced via the diaphragm 202.
  • the restriction to relatively high frequencies makes it possible to use a membrane 202 with a relatively small diameter.
  • a relatively compact component 112 can thus be provided.
  • the low-frequency range can be filtered electrically in order to ensure that no audible resonances are generated during audio playback via the operating terminal 114.
  • the housing, in particular the rear housing wall, 206 of the component 112 can be made of plastic. Housing 206 (with fasteners 201) can be used to secure diaphragm 202 by external restraint 209. Furthermore, an acoustic short circuit of the membrane 202 can be avoided by the housing 206 . With the help of the housing 206, the component 112 can be attached to the operating terminal 114 (e.g. glued or screwed).
  • the outer clamp 209 (also referred to as the membrane ring in this document) is arranged at a distance from the rear of the operating terminal (ie the front panel) 114, so that there is an opening between the clamp 209 and the rear of the operating terminal 114, from which the membrane 202 produced sound waves can escape. In this way, the quality of the audio playback can be further increased.
  • the acoustic quality in terms of haptics and the audio output typically depend on the weight of the magnet system 204, the size of the housing 206 and/or the design of the one or more damping rings 203. If necessary, two damping rings 203, 208 can be attached, a first damping ring 203 at the front on the coil carrier 205 towards the operating terminal 114 and a second damping ring 208 at the rear on the magnet system 205 towards the housing 206.
  • the component 112 thus has numerous different adjustment options that can each be adjusted individually and/or in combination in order to optimize the quality of the acoustic reproduction.
  • a single component 112 is thus described, which makes it possible to provide both the haptic reproduction and the acoustic speech or music output with a relatively high quality.
  • the component 112 can be controlled via an amplifier, which superimposes the haptic signal and the audio signal by means of signal superimposition, and causes the movement of the magnet system 204 based thereon.
  • the component 112 has only a single magnetic voice coil system and can therefore be provided in a cost-effective and space-efficient manner. Furthermore, by using the operating terminal 114 for audio playback in the low-frequency range, a membrane 202 adapted and/or optimized for audio playback in the mid-range and/or high-frequency range can be used, as a result of which the playback quality and/or the efficiency of the component 112 can be further increased .

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)

Claims (12)

  1. Dispositif (112) de restitution d'un signal haptique et/ou d'un signal audio sur une plaque (114), dans lequel le dispositif (112) comprend :
    - une bobine (205) fixée à la plaque (114) ;
    - un système magnétique (204) servant à produire un champ magnétique dans lequel la bobine (205) est immergée ;
    - une membrane (202) fixée à la plaque (114) et au système magnétique (204) de telle sorte que la membrane (202) est excitée par un mouvement du système magnétique (204) à vibrations, la membrane (202) étant conique et englobant la bobine (205) ; et
    - une unité d'amorce (111) servant à
    - produire un signal d'amorce pour la restitution du signal haptique et/ou du signal audio ; et
    - activer un courant de bobine dépendant du signal d'amorce par la bobine (205) pour activer la restitution du signal haptique et/ou du signal audio,
    caractérisé en ce que le dispositif (112) comprend un premier élément d'amortissement (203) au-dessus duquel la bobine (205) est fixée à la plaque (114) ;
    - le premier élément d'amortissement (203) comprend une caractéristique passe-bas ; et/ou
    - le premier élément d'amortissement (203) configuré pour transmettre à la plaque (114) des fractions de fréquence du signal d'amorce en dessous d'une fréquence limite, et/ou découpler au moins en partie de la plaque (114) des fractions de fréquence du signal d'amorce au-dessus de la fréquence limite,
    - le dispositif (112) comprenant en outre une bague de membrane (209), laquelle est raccordée fixement par un ou plusieurs éléments de fixation (201) à la plaque (114) ;
    - la bague de membrane (209) étant disposé à distance de la plaque (114) et à distance du système magnétique (204) entre la plaque (114) et le système magnétique (204) ; et
    - la membrane (202) étant fixée à la bague de membrane (209).
  2. Dispositif (112) selon la revendication 1, dans lequel le dispositif (112) est réalisé de sorte que
    - une grande partie et/ou plus de 50% de l'énergie d'une composante du signal d'amorce est transmise à la plaque (114) pour la restitution du signal haptique par la bobine (205), pour faire vibrer la plaque (114) ; et/ou
    - une grande partie et/ou plus de 50% de l'énergie d'une composante du signal d'amorce est transmise à la membrane (202) pour la restitution du signal audio par les vibrations du système magnétique (204), pour exciter la membrane (202) aux vibrations.
  3. Dispositif (112) selon l'une des revendications précédentes, dans lequel le dispositif (112) comprend
    - une paroi (206) de boîtier configurée pour recouvrir le dispositif (112) sur un côté arrière de la membrane (202) tournant le dos à la plaque (114) ; et
    - un ou plusieurs éléments de fixation (201) servant à raccorder la plaque (114) à la paroi arrière (206).
  4. Dispositif (112) selon la revendication 3, dans lequel le dispositif (112) comprend un deuxième élément d'amortissement (208) par le biais duquel le système magnétique (204) est fixé à la paroi (206) de boîtier.
  5. Dispositif (112) selon la revendication 5, dans lequel
    - le deuxième élément d'amortissement (208) comprend une caractéristique passe-bas ; et/ou
    - le deuxième élément d'amortissement (208) est configuré pour transmettre à la plaque (114) des fractions de fréquence du signal d'amorce en dessous d'une fréquence limite par la paroi (206) de boîtier et par le un ou plusieurs éléments de fixation (201), et/ou pour découpler au moins en partie de la plaque (114) des fractions de fréquence du signal d'amorce au-dessus de la fréquence limite.
  6. Dispositif (112) selon l'une des revendications précédentes, dans lequel le système magnétique (204) est fixé mobile à la plaque (114) par la membrane (202) de sorte que le système magnétique (204) peut vibrer dans un sens de vibrations qui s'étend à la perpendiculaire de la plaque (114).
  7. Dispositif (112) selon l'une des revendications précédentes, dans lequel la bobine (205) est configurée pour produire un champ magnétique variant en fonction du signal d'amorce et dépendant du courant de bobine, pour faire que le système magnétique (204) se déplace dans un sens de vibration et modifie ainsi la profondeur d'immersion de la bobine (205) dans le champ magnétique du système magnétique (204).
  8. Dispositif (112) selon l'une des revendications précédentes, dans lequel le dispositif (112) comprend un porte-bobine (215) qui fixe la bobine (205) à la plaque (114).
  9. Dispositif (112) selon l'une des revendications précédentes, dans lequel le dispositif (112) comprend une araignée de centrage (207) configurée pour raccorder la bobine (205) au système magnétique (204).
  10. Dispositif (112) selon l'une des revendications précédentes, dans lequel
    - le système magnétique (204) comprend un premier pôle (211) entourant un deuxième pôle (212) de sorte qu'un champ magnétique est produit dans un creux annulaire entre le premier pôle (211) et le deuxième pôle (212) ; et
    - la bobine (205) est configurée pour être immergée dans le creux annulaire.
  11. Interface d'utilisateur (110) pour un appareil (100), dans laquelle l'interface d'utilisateur (110) comprend :
    - une plaque (114) comprenant un écran (113) tactile, sur lequel un élément de commande virtuel (117) peut s'afficher ;
    - un dispositif (112) sur la plaque (114) destiné à la restitution d'un signal haptique et/ou d'un signal audio, selon l'une des revendications précédentes ; et
    une unité de commande (111) configurée pour
    - détecter que l'élément de commande virtuel (117) a bien été actionné par l'utilisateur ;
    - permettre, en réaction à cela, au dispositif (112) de restituer un signal haptique sur la plaque (114), pour donner à l'utilisateur une information en retour haptique relative à l'actionnement de l'élément de commande virtuel (117) ; et/ou
    - détecter qu'un signal audio doit être émis ; et
    - permettre, en réaction à cela, au dispositif (112) de restituer le signal audio.
  12. Appareil ménager (100) comprenant l'interface d'utilisateur (110) selon la revendication 14 et/ou le dispositif (112) selon l'une des revendications 1 à 10.
EP20168764.7A 2019-04-17 2020-04-08 Dispositif de lecture des signaux haptiques et des signaux audio Active EP3725424B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019205628.8A DE102019205628A1 (de) 2019-04-17 2019-04-17 Vorrichtung zur Wiedergabe von haptischen Signalen und Audiosignalen

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EP3725424A1 EP3725424A1 (fr) 2020-10-21
EP3725424B1 true EP3725424B1 (fr) 2023-06-07

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CN115623383A (zh) * 2021-07-13 2023-01-17 群创光电股份有限公司 电子装置以及其控制方法

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DE102019205628A1 (de) 2020-10-22

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