EP1086606B1 - Haut-parleurs a panneaux - Google Patents

Haut-parleurs a panneaux Download PDF

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Publication number
EP1086606B1
EP1086606B1 EP99924965A EP99924965A EP1086606B1 EP 1086606 B1 EP1086606 B1 EP 1086606B1 EP 99924965 A EP99924965 A EP 99924965A EP 99924965 A EP99924965 A EP 99924965A EP 1086606 B1 EP1086606 B1 EP 1086606B1
Authority
EP
European Patent Office
Prior art keywords
panel
borders
width
centre
gravity
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.)
Revoked
Application number
EP99924965A
Other languages
German (de)
English (en)
Other versions
EP1086606A1 (fr
Inventor
Wolfgang Bachmann
Gerhard Krump
Hans-Jürgen Regl
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.)
Harman Becker Automotive Systems GmbH
Original Assignee
Harman Audio Electronic Systems GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7870481&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1086606(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Harman Audio Electronic Systems GmbH filed Critical Harman Audio Electronic Systems GmbH
Publication of EP1086606A1 publication Critical patent/EP1086606A1/fr
Application granted granted Critical
Publication of EP1086606B1 publication Critical patent/EP1086606B1/fr
Anticipated expiration legal-status Critical
Revoked 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
    • 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

Definitions

  • the invention relates to so-called plate speakers, which according to the Bending shaft principle work, especially on the positioning of the drivers on Panel loudspeaker.
  • plate loudspeakers which according to Bending shaft principle work.
  • Such arrangements are essentially formed by a panel and at least one drive system, the Panel is vibrated when the drive system (s) electrical audio frequency signals are supplied.
  • Characteristic of such Sound reproducing devices is that from a lower cut-off frequency, the so-called critical frequency a "bending wave radiation" is possible, the bending waves in the plane of the respective panel to a Lead sound radiation with frequency-dependent direction.
  • a section through a created directional diagram shows a main lobe, the Direction is frequency dependent.
  • the panel of the panel loudspeaker is constructed according to the sandwich principle, in that preferably two opposing surfaces of a light core layer are each connected to a cover layer that is thin compared to the core layer, for example by gluing.
  • the material for the cover layer must have a particularly high expansion wave speed.
  • Suitable cover layer materials are, for example, thin metal foils or fiber-reinforced plastic foils. Special requirements are also placed on the core layer, because this layer must above all have a particularly low density (for example 20 to 30 kg / m 3) .
  • the core layer should be able to absorb high shear stresses normal to the cover layers.
  • the modulus of elasticity in the direction normal to the cover layers must be sufficiently large, while a very low modulus of elasticity does not interfere parallel to the cover layers.
  • the core layer can show anisotropic or isotropic behavior.
  • honeycombs made of light metal alloys or resin-impregnated fiber-reinforced papers (anisotropic) and rigid foams (isotropic) have proven themselves as ultra-light core layer structures.
  • the panels are driven by drivers that -as shown in DE-A-197 57 097- either placed on the respective panel or integrated into it.
  • the drivers are approximately in the form of electrodynamic shakers or piezoelectric bending vibration disks as Drive elements predominantly in the center or close to the edge be attached, although from the consideration of individual, undisturbed Vibration modes of rectangular panels appear to make more sense in other places could.
  • the difficulty lies in optimizing the excitation position considering the driver feedback, considering many, but especially the low-frequency fashions and taking into account the acoustic contributions of each vibration mode in each considered Modal frequency.
  • One solution would be modeling using the finite element method combined with a numerical solution to the acoustic Field equations and with a stochastic variation of the boundary conditions and exact positions in the range of realistic tolerances.
  • Another solution would exist in the practical testing of ready-made record speakers random driver positions. Both conceivable solution methods are very consuming.
  • WO97 / 09842 describes a procedure with which suitable points for mounting drivers on a panel can be determined. However, they are based on this Places determined in particular when using fixed in panels clamped in a frame as disadvantageous proved. In addition, the known procedure offers only a small selection of attachment points, so that the Applications are very limited overall.
  • the invention is therefore based on the object of positioning areas for drivers to specify which driver, based on the area of the panel without large Effort and can be placed with high efficiency.
  • the positioning range extends between one Edge zone, which is directly adjacent to the edges of the panel in the direction of the Focus panels and a focus zone, which is around extends the center of gravity of the panel, there is a high yield in the available vibration modes are reached and at the same time become unfavorable Point impedances avoided.
  • the Width B of the edge zone must be at least 5% of the diagonals of the panel, um to reduce the point impedances.
  • a particularly sustainable reduction occurs of the fixed clamping when the width B of the edge zone has values of takes about 10% of the diagonals of the panel.
  • the center of gravity should have a diameter D of have at least 20% of the diagonal of the panel. Smaller diameter values lead to a disproportionate exclusion of vibration modes for the Drive the panel.
  • the panel on compliant elements with the frame connected, the center of gravity should be cruciform because the areas immediately adjacent to those through the centers of the edges and the Connect the center of gravity of the panel running side bisectors as not have proven suitable for the positioning of drivers.
  • the Reductions can be designed as specified in claim 5.
  • the panel does not have a square, but an elongated one Shape, the width should be for different long edges of the panel be different.
  • width B1 of the edge zone, which runs along the long edges of the panel is greater than the width B2 of the Edge zone, which runs along the short edges.
  • the width B1 should be at least 10% and B2 be at least 5% of the diagonal of the panel.
  • the parallel to the long Edge areas of the panel-running surface areas have a width 3.1 of 2.5% or greater and parallel to the short edges of the panels extending surface areas a width 3.2 greater than or equal to 17% of the Have diagonals of the panel.
  • the distance A1 about 7% and the distance A2 about 14% of the diagonals of the panel.
  • FIG. 1 is a plan view, not to scale, of a Record speakers 10 shown.
  • This plate speaker 10 is in essentially of a panel 11 in sandwich construction, two drivers 12 and a Ralunen 13 formed. Since the panel 11 in the present Embodiment is elongated, edges are of different lengths 14 available, namely the long edges 14.l and the short edges 14.k.
  • the Panel 11 is rigidly connected to the ralune 13 at its edges 14.
  • the Drivers 12 are integrated in the panels 11 and are therefore only indicated in FIG. 1.
  • Positioning area for drivers is identified by reference numeral 15.
  • This positioning area 15, which is dotted for better illustration, extends between an edge zone 16 which is directly adjacent to the edges 14 connects and has a width B, and a center of gravity 17 with a Diameter D1.
  • Under focus zone 17 is related to this application understood the area of the panel 11, the focus S of the panel 11 surrounds.
  • the edge zone 16 which in the present exemplary embodiment is uniform Width B of 10% of the diagonal D of the panel 11 can be in another - Not shown- embodiment for the different lengths of edges 14.l, 14.k be of different widths. But even in this case, the Edge zone 16 has the greatest possible width B in order to achieve point impedances excluded.
  • the focus zone 17 in the present case has a diameter D1 of 25% Diagonals D of the panel 11. To as many vibration modes for the To use the drive of the panel 11, the focus zone 17 should also be chosen as large as possible.
  • Fig. 2 is another embodiment for an optimal Positioning area 15 (15.1 to 15.4) shown.
  • the panel 11 on its edges 14.l, 14.k by means of elastic elements 18th connected to the frame 13. Only for the sake of completeness noted that the type of connection between frame 13 and panel 11 not much influence for the optimal positioning of the driver 12 on the Panel 11 has, so that those shown in the embodiment of FIG. 1 Ratios largely also for plate speakers 10 according to Fig.2 and apply in reverse.
  • the edge zone 16 does not have a uniform width B. Rather, they are edge zones 16 with the width running parallel to the long edges 14.l. B1 wider than the edge zones 16 running parallel to the short edges 14.k. with the width B2.
  • the dependence of the different widths B1, B2 on the size The panel 11 is given by the fact that the width B1 is approximately 16% and the width B2 is approximately 6.3% of the diagonal D of the panel 11.
  • the width B3 (B3.1, B3.2) of both surface strips 17 ', 17 " is of different sizes in order to still have a reasonably large processing area 15 for to get the drivers 12.
  • 14.k is the width B3.2 of the area strip 17 ', which runs parallel to the long edge 14.l, 2.9% and the width B3.1 of the other area strip 17 "17.4% of the diagonals D of the panel 11.
  • Two sides of each reduction 20 are used by the Inner edges 21 of the edge zone 16 are formed.
  • the third pages of the triangular reductions 20 lie on a line 22, which - as shown in Fig. 2 - connects the centers M of all edges 14 together.
  • the distance A1 between the driver 12 and the center line is M '6.9% and the distance A2 between driver 12 and center line M "14% of the Diagonals D of the panel 11.
  • Driver 12 meet the distance requirements to the center lines M ', M ", the conditions in another - not shown - embodiment not be fulfilled for all drivers 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Claims (12)

  1. Haut-parleur plat composé d'un panneau (11) ayant des côtés (14, 14.l, 14.k) et un centre de gravité (S), d'un cadre (13) relié au panneau (11) et d'au moins un moteur (12) relié au panneau (11),
    caractérisé par
    une zone de bord (16), s'étendant jusqu'au centre de gravité (S) et directement adjacente aux côtés (14, 14.l, 14.k) du panneau (11), la largeur (B) de cette zone de bord représentant au moins 5 % de la diagonale (D) du panneau (11),
    une zone de centre de gravité (17) s'étendant autour du centre de gravité (S) avec un diamètre (D1) représentant au moins 25 % de la diagonale (D) du panneau (11), et
    une zone de positionnement (15, 15.1 - 15.4) s'étendant entre la zone (17) du centre de gravité et la zone de bord (16), et dans laquelle se trouve(nt) exclusivement le ou les moteurs (12).
  2. Haut-parleur plat selon la revendication 1,
    caractérisé en ce que
    le panneau (11) est serré solidairement dans le cadre (13).
  3. Haut-parleur plat selon la revendication 1,
    caractérisé en ce que
    le panneau (11) est relié au cadre (13) par des éléments souples (18),
    la zone de centre de gravité (17) est une zone de surface cruciforme, constituée par deux bandes de surface (17', 17") passant par le centre de gravité (S) du panneau (11), perpendiculaire l'une à l'autre et reliant les zones de bord (16) suivant le chemin le plus court.
  4. Haut-parleur plat selon la revendication 3,
    caractérisé en ce que
    les quatre zones de positionnement (15.1...15.4) qui résultent de la réalisation cruciforme de la zone de centre de gravité (17, 17', 17"), présentent une réduction (20) à proximité des zones au niveau desquelles chaque fois deux côtés (14.l, 14.k) du panneau (11) forment un coin (19).
  5. Haut-parleur plat selon la revendication 4,
    caractérisé en ce que
    les réductions (20) des zones de positionnement (15.1-15.4) ont une forme de triangle, deux côtés de chaque réduction (20) en forme de triangle des bords intérieurs (21) de la zone de bord (16) et les côtés restants des réductions (20) en forme de triangles étant situés sur un tracé fermé (22) reliant les milieux (M) des bords (14, 14.l, 14.k).
  6. Haut-parleur plat selon l'une quelconque des revendications 2 à 5,
    caractérisé en ce que
    le panneau (11) est rectangulaire et chaque fois deux côtés (14.l, 14.k) du panneau (11) formant un coin (19) ont une longueur différente et
    la largeur (B) des zones de bord (16) pour des bords différents (14.1, 14.k) du panneau (11) ont une largeur différente.
  7. Haut-parleur plat selon la revendication 6,
    caractérisé en ce qu'
    une première largeur (B1) de la zone de bord (16) adjacente au grand côté (14.l) du panneau (11) est plus grande que la seconde largeur (B2) de la zone de bord (16) adjacente au petit côté (14.k) du panneau (11).
  8. Haut-parleur plat selon la revendication 7,
    caractérisé en ce que
    la première largeur (B1) représente au moins 10 % et la seconde largeur (B2) au moins 5 % des diagonales (D) du panneau (11).
  9. Haut-parleur plat selon l'une quelconque des revendications 3 à 8,
    caractérisé en ce que
    les deux zones de surface (17', 17") qui se croisent ont une largeur différente (B3).
  10. Haut-parleur plat selon l'une quelconque des revendications 6 à 8,
    caractérisé en ce que
    les deux zones de surface (17', 17") qui se croisent ont une largeur différente (B3), les zones de surface (17') parallèles au grand côté (14.l) du panneau (11) ayant une largeur (3.1) supérieure/égale à 2,5 %, et la zone de surface (17") parallèle au petit côté (14.k) du panneau (11) ayant une largeur (3.2) supérieure/égale à 17 % des diagonales (D) du panneau (11).
  11. Haut-parleur plat selon l'une quelconque des revendications 6 à 10,
    caractérisé en ce que
    les moteurs (12) sont chaque fois distants des lignes médianes (M', M") qui se coupent au centre de gravité (S) et sont parallèles au grand côté et au petit côté (14.l, 14.k), en chaque fois une distance telle qu'une première distance (A1) correspond à la distance du moteur (12) par rapport à la ligne médiane (M') parallèle au grand côté (14.l) et une seconde distance (A2) correspondant à la distance entre le moteur (12) et la ligne médiane (M") parallèle au petit côté (14.k) et
    la première distance (A1) est inférieure à la seconde distance (A2).
  12. Haut-parleur plat selon la revendication 11,
    caractérisé en ce que
    la première distance (A1) représente environ 7 % et la seconde distance (A2) environ 14 % des diagonales (D) du panneau (11).
EP99924965A 1998-06-10 1999-05-14 Haut-parleurs a panneaux Revoked EP1086606B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19825866 1998-06-10
DE19825866A DE19825866A1 (de) 1998-06-10 1998-06-10 Plattenlautsprecher
PCT/EP1999/003307 WO1999065273A1 (fr) 1998-06-10 1999-05-14 Haut-parleurs a panneaux

Publications (2)

Publication Number Publication Date
EP1086606A1 EP1086606A1 (fr) 2001-03-28
EP1086606B1 true EP1086606B1 (fr) 2002-04-10

Family

ID=7870481

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99924965A Revoked EP1086606B1 (fr) 1998-06-10 1999-05-14 Haut-parleurs a panneaux

Country Status (5)

Country Link
US (1) US6836552B1 (fr)
EP (1) EP1086606B1 (fr)
JP (1) JP2002518910A (fr)
DE (2) DE19825866A1 (fr)
WO (1) WO1999065273A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6836552B1 (en) 1998-06-10 2004-12-28 Harman Audio Electronic Systems Gmbh Panel loudspeakers

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10001410C2 (de) 2000-01-14 2001-12-06 Harman Audio Electronic Sys Flachlautsprecheranordnung
DE10058102C2 (de) * 2000-11-23 2003-07-03 Harman Audio Electronic Sys Elektrodynamischer Biegemomententreiber
GB0123932D0 (en) * 2001-10-05 2001-11-28 New Transducers Ltd Loudspeakers
DE10154915B4 (de) * 2001-11-08 2005-02-03 Harman/Becker Automotive Systems Gmbh (Harman Division) Flachlautsprecheranordnung
US20040038722A1 (en) * 2002-08-22 2004-02-26 Michael Gauselmann Gaming machine having a distributed mode acoustic radiator
CN101310561B (zh) * 2005-11-14 2012-04-11 Nxp股份有限公司 用于压电扬声器的不对称动作系统和不对称扬声器
JP4524700B2 (ja) * 2007-11-26 2010-08-18 ソニー株式会社 スピーカ装置およびスピーカ駆動方法
US9788121B2 (en) * 2013-05-08 2017-10-10 Goertek Inc. Flat plate-type bass loudspeaker
US9769572B2 (en) * 2013-05-08 2017-09-19 Goertek Inc. Tablet woofer and electronic device using same
KR101707085B1 (ko) * 2013-05-08 2017-02-15 고어텍 인크 평판형 저음 스피커
DE102015217778B4 (de) * 2015-09-17 2019-05-29 Robert Bosch Gmbh Akustischer Sensor mit einer Membran und einem elektroakustischen Wandler
KR102370183B1 (ko) 2017-07-12 2022-03-03 엘지디스플레이 주식회사 표시장치

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UA51671C2 (uk) 1995-09-02 2002-12-16 Нью Транзд'Юсез Лімітед Акустичний пристрій
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DE19757098C2 (de) 1997-12-20 2003-01-09 Harman Audio Electronic Sys Aufhängung für Schallwiedergabeanordnungen nach dem Biegewellenprinzip
DE19757099A1 (de) 1997-12-20 1999-06-24 Nokia Deutschland Gmbh Kontaktierung für eine Schallwiedergabeanordnung nach dem Biegewellenprinzip
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DE19840375C2 (de) 1998-09-04 2003-08-28 Harman Audio Electronic Sys Schallwand
DE10001410C2 (de) 2000-01-14 2001-12-06 Harman Audio Electronic Sys Flachlautsprecheranordnung
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6836552B1 (en) 1998-06-10 2004-12-28 Harman Audio Electronic Systems Gmbh Panel loudspeakers

Also Published As

Publication number Publication date
US6836552B1 (en) 2004-12-28
DE19825866A1 (de) 1999-12-16
JP2002518910A (ja) 2002-06-25
EP1086606A1 (fr) 2001-03-28
DE59901200D1 (de) 2002-05-16
WO1999065273A1 (fr) 1999-12-16

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