EP3836559A1 - Haut-parleur plat - Google Patents

Haut-parleur plat Download PDF

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Publication number
EP3836559A1
EP3836559A1 EP20212136.4A EP20212136A EP3836559A1 EP 3836559 A1 EP3836559 A1 EP 3836559A1 EP 20212136 A EP20212136 A EP 20212136A EP 3836559 A1 EP3836559 A1 EP 3836559A1
Authority
EP
European Patent Office
Prior art keywords
flat
exciters
carrier
flat membrane
loudspeaker according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20212136.4A
Other languages
German (de)
English (en)
Inventor
Michael Hein
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE202019004991.6U external-priority patent/DE202019004991U1/de
Application filed by Individual filed Critical Individual
Publication of EP3836559A1 publication Critical patent/EP3836559A1/fr
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  using transducers reproducing the same frequency band
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/05—Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact

Definitions

  • the invention relates to a flat loudspeaker consisting of at least two exciters and at least one flat membrane excited by these exciters.
  • Flat speakers are, for example, from the DE 10 2005 047 300 A1 and the WO 2004/073 350 A1 known.
  • panel loudspeakers are provided with more than one exciter.
  • more than one exciter is used on a flat membrane and vibrated, this leads to vibration interference between the individual exciters in the flat membrane, which has an unfavorable effect on the sound quality of the flat speaker, especially when it comes to speech reproduction.
  • the invention is therefore based on the object of creating a flat-panel loudspeaker of the type mentioned at the outset, in which the transmission behavior of the flat-panel loudspeaker is improved in the relevant range of speech from 300 Hz to 5000 Hz.
  • the basic idea of the invention is the non-positive attachment of a material to the flat membrane, which is preferably designed as a square rod, is arranged between the flat membrane and the exciters and preferably has a higher speed than the material of the flat membrane in terms of sound propagation and as a coupling material is used between the actual flat membrane and the exciters.
  • the coupling material acts as a sound collector, which collects the vibration impulse that is generated in parallel on several exciters in the same frequency range or in different frequency ranges, and in comparison to a flat-panel loudspeaker without use such a sound collector introduces more coherently into the surface membrane.
  • the invention thus essentially consists in a sound busbar for coherent sound radiation of multiple arranged vibration exciters on acoustic surface radiators.
  • the vibration interferences between the individual exciters which according to the configuration according to the prior art have an unfavorable effect on the sound quality of the flat-panel loudspeaker, especially during speech reproduction, are shifted to high frequencies, so that the transmission behavior of the flat-panel loudspeaker in the relevant range the speech is improved from 300 Hz to 5000 Hz.
  • a panel loudspeaker with a panel diaphragm and at least two exciters acting on the panel diaphragm is proposed, at least one carrier designed as a sound collector being provided, one side of which is connected to the panel diaphragm and the side opposite the panel diaphragm to at least two exciters.
  • the carrier carries the exciter and is essentially cuboid, specifically designed as a cuboid strip.
  • the thickness of the support is preferably less than the thickness of the flat membrane, at least one support being arranged on the flat membrane in the direction of the longitudinal axis of the flat membrane.
  • at least one carrier is arranged in the longitudinal axis of the flat membrane.
  • a further carrier which extends essentially transversely to the longitudinal axis of the flat membrane, is made shorter than the first carrier.
  • the carrier preferably has a higher speed of sound propagation than the flat membrane.
  • the material or the material properties of the flat membrane and the at least one carrier are so different that the Speed of sound in the carrier is greater than in the flat membrane. Due to this property, the sound pulse generated in parallel on several exciters at the same time in the same frequency range or in different frequency ranges is introduced very coherently into the flat membrane.
  • the at least one carrier is preferably connected to the flat membrane over the entire surface.
  • the at least two exciters are only connected to the carrier in sections and thus, for example, protrude beyond the surface of the carrier.
  • the at least two exciters are connected in sections to at least one second carrier connected to the flat membrane.
  • the carriers and the exciters are arranged in such a way that a gap bridged by the exciters remains between the carriers, which are arranged parallel to one another and spaced apart from one another.
  • a simple and efficient design is achieved in that the carrier is a carbon fiber square rod.
  • the carrier is preferably linear. According to an alternative embodiment, the carrier is preferably designed in the shape of a wave in the plane parallel to the flat membrane.
  • a plurality of carriers connected to the flat membrane have a jointly controlled group of exciters connected to them.
  • the distance between exciters combined to form a group is preferably less than the distance between two exciters of different groups.
  • a plurality of carriers connected to the flat membrane each have an individually controlled group of exciters connected to them.
  • Fig. 1 shows a perspective view of the rear of a first preferred embodiment of a flat panel loudspeaker according to the invention.
  • Fig. 1 a perspective view of a flat membrane 1 with a carrier 2 designed as a sound collector and two exciters 4, 5, in which a single sound collector 2 is arranged between the flat membrane 1 and an exciter group 4, 5.
  • the carrier 2 in the longitudinal axis of the flat membrane 1 is connected to the latter over the entire area, the exciters 4, 5 being arranged evenly distributed on the carrier 2 and connected to the latter over the entire area.
  • Fig. 2 shows a perspective view of the rear of a second preferred embodiment of a flat panel loudspeaker according to the invention.
  • Fig. 2 a perspective view of a flat membrane 1 with the supports 8, 9 designed as sound collectors and two exciters 4, 5 connected to the supports 8, 9.
  • the supports 8, 9 are arranged in the longitudinal direction of the flat membrane and parallel to each other, the exciters 4, 5 connected in sections to the carriers 8, 9 and bridging the gap remaining between the carriers 8, 9 and arranged in the middle of these.
  • Fig. 3 shows a perspective view of the rear of a third preferred embodiment of a flat panel loudspeaker according to the invention.
  • Fig. 3 a perspective view of a flat membrane 1 with the carriers 10, 11 designed as sound collectors and the four exciters 4, 5, 6, 7.
  • Each carrier 10, 11 has each has one exciter group formed from two exciters 4, 5, 6, 7, which can be controlled jointly or separately.
  • Fig. 4 shows a perspective view of the rear of a fourth preferred embodiment of a flat panel loudspeaker according to the invention.
  • Fig. 4 a perspective view of a flat membrane 1 with a support 12 designed as a sound collector and two exciters 4, 5, in which the exciters 4, 5 are only partially connected to the support 12 and protrude freely above the support 12.
  • FIG. 5 a perspective view of the rear of a fifth preferred embodiment of a flat panel loudspeaker according to the invention.
  • Fig. 5 a perspective view of a flat membrane 1 with a carrier 2 designed as a sound collector and four exciters 3, 4, 5, 6, which can be combined in functional groups separately or controlled together.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
EP20212136.4A 2019-12-09 2020-12-07 Haut-parleur plat Pending EP3836559A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202019004991.6U DE202019004991U1 (de) 2019-12-09 2019-12-09 Schallsammelschiene zur kohärenten Schallabstrahlung mehrfach angeordnter Schwingungserreger auf akustischen Flächenstrahlern
DE102020125286.2A DE102020125286A1 (de) 2019-12-09 2020-09-28 Flächenlautsprecher

Publications (1)

Publication Number Publication Date
EP3836559A1 true EP3836559A1 (fr) 2021-06-16

Family

ID=75847946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20212136.4A Pending EP3836559A1 (fr) 2019-12-09 2020-12-07 Haut-parleur plat

Country Status (1)

Country Link
EP (1) EP3836559A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004073350A1 (fr) 2003-02-13 2004-08-26 Puren Gmbh Systeme pour doter un element de decoration interieure d'une fonction de haut-parleur
DE102005047300A1 (de) 2005-03-21 2006-10-05 Theis, Heinz Jürgen Mindestens einen Antrieb, insbesondere mit Flachmembran-Lautsprechermembran, und mindestens ein plattenartiges Element aufweisende Vorrichtung zum Einbau in Wänden und Decken und zur Beschallung von Räumen
DE102006039455A1 (de) * 2006-08-23 2008-03-13 Puren Gmbh Flächenlautsprechervorrichtung
US20150010174A1 (en) * 2011-12-27 2015-01-08 Kyocera Corporation Vibration device, sound generator, speaker system, and electronic device
EP3379387A1 (fr) * 2017-03-20 2018-09-26 LG Electronics Inc. Afficheur
US20180343512A1 (en) * 2017-05-29 2018-11-29 Lg Display Co., Ltd. Sound generator and display apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004073350A1 (fr) 2003-02-13 2004-08-26 Puren Gmbh Systeme pour doter un element de decoration interieure d'une fonction de haut-parleur
DE102005047300A1 (de) 2005-03-21 2006-10-05 Theis, Heinz Jürgen Mindestens einen Antrieb, insbesondere mit Flachmembran-Lautsprechermembran, und mindestens ein plattenartiges Element aufweisende Vorrichtung zum Einbau in Wänden und Decken und zur Beschallung von Räumen
DE102006039455A1 (de) * 2006-08-23 2008-03-13 Puren Gmbh Flächenlautsprechervorrichtung
US20150010174A1 (en) * 2011-12-27 2015-01-08 Kyocera Corporation Vibration device, sound generator, speaker system, and electronic device
EP3379387A1 (fr) * 2017-03-20 2018-09-26 LG Electronics Inc. Afficheur
US20180343512A1 (en) * 2017-05-29 2018-11-29 Lg Display Co., Ltd. Sound generator and display apparatus

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