CN1299576A

CN1299576A - Panel-form loudspeaker

Info

Publication number: CN1299576A
Application number: CN99805906A
Authority: CN
Inventors: 亨利·阿齐马; 尼尔·哈里斯
Original assignee: New Transducers Ltd
Current assignee: NVF Tech Ltd
Priority date: 1998-05-23
Filing date: 1999-05-20
Publication date: 2001-06-13
Also published as: CA2332824A1; MXPA00011483A; KR20010043478A; EP1080605A1; WO1999062294A1; ZA200005771B; IL139669A0; JP2002517149A; BR9910666A; GB9811098D0; AU3938199A

Abstract

A method of operating a resonant panel-form loudspeaker, comprising arranging the loudspeaker panel near to a boundary so as to be acoustically linked to the boundary and with the plane of the loudspeaker panel at an angle to the boundary. The method may comprise moving the panel between a rest position in which the panel is parallel to and adjacent the boundary and a position of use in which the panel is at an angle to the boundary. A resonant panel-form loudspeaker support comprising means engaging and retaining the loudspeaker panel to be supported, means adapted for engagement with, and fixing to, a boundary, e.g. a wall or ceilling, and means connecting the respective loudspeaker and boundary engagement means, whereby the loudspeaker is supported adjacent to the boundary and at an angle thereto and such that the loudspeaker is linked acoustically to the boundary. The combination of a resonant panel-form loudspeaker and a support as described above.

Description

Flat-plate loudspeaker

The present invention relates to a kind of flat-plate loudspeaker, more specifically, but not exclusively, relate to the resonance flat-plate loudspeaker, for example the sort of described in our International Application No. WO 97/09842.

Usually, loud speaker is placed in the room with main adjacent wall or border coplane or near coplane, and with the scope of this border certain distance in.This scope extends to apart from border about one meter or more freedom space from almost contacting with the border.When a plurality of loud speakers used together, hearer that they are often served according to making or spectators were on the loud speaker radiation axis of how much central authorities and/or design or near mode is placed.

It is the piston type loud speaker that this general method both had been used for common points of proximity sound source, the use as the distributed resonance flat-plate loudspeaker of WO97/09842 theme that is used for also that the front advises.

Different with common piston type loud speaker, distributed resonance flat-plate loudspeaker has bigger bipolar and intrinsic diffuse reflection.When this flat-plate loudspeaker and border near and coplane when placing, can have interference problem, cause from the counteracting of planar surface to the radiation of boundary direction.

The objective of the invention is need in free space, not install under the condition of loudspeaker panel, eliminate or weaken this border cancellation problem at least.

An aspect among the present invention is the method for operation resonance flat-plate loudspeaker, comprise near the border arrange loudspeaker panel so that its with border generation sound on coupling and make the plane of loudspeaker panel and the border at angle.This angle that becomes with the border can be greater than 10 °, and this angle also can be vertical with the border basically.If required, this plate can leave in the adjacent and parallel off-position in border and move to and use location at angle, border.

Another aspect among the present invention is the supporting of resonance flat-plate loudspeaker, it comprises the device that engages and support supported loudspeaker panel, be used for and the border for example wall in room or the device that ceiling engages and is connected with it, and the device that correspondingly connects loud speaker and border coupling device, jockey is arranged on adjacent and and the border position adjacent of a side with loud speaker.Preferably, jockey can move to the device of loudspeaker panel with the service position of extending at angle with the border from concordant with the border basically deposit position for making loudspeaker panel.

Jockey can be the hinge that has a vertical substantially rotating shaft.

Can also provide a device that stops hinge movement, preventing unexpected relative motion, thereby loudspeaker panel can remain on the position that it is placed.

Corresponding coupling device can be the device that coupling device is installed to loudspeaker panel and wall etc. with securing members such as screws.

Another aspect among the present invention is the combined system of resonance flat-plate loudspeaker and border supporting, wherein, the border supporting is used for loudspeaker panel is installed on the border, thereby make the edge of loudspeaker panel and border adjacent, and make loudspeaker panel can with the service position of the angled placement in border and the deposit position concordant with the border between move.Flat-plate loudspeaker can be resonant contribution formula radiator one class described in our International Application No. WO 97/09842 of pending trial together.

The present invention has carried out graphic extension by way of example in the accompanying drawings.In the accompanying drawing,

Fig. 1 is the plane graph that the family expenses room of audio-visual apparatus is housed therein;

Fig. 2 be Fig. 1 the room a part perspective view and represented a flat-plate loudspeaker that is contained on the wall;

Fig. 2 a is the perspective view of the magnification ratio of loud speaker shown in Figure 2;

Fig. 3 has a perspective view of a part that is contained in the room of the flat-plate loudspeaker on the ceiling; And

Fig. 4 is the perspective view of a supporting, is fixed to flat-plate loudspeaker on the wall or on the ceiling by it.

In these figure, and see figures.1.and.2 in more detail, the family expenses room of a rectangle is surrounded by an antetheca 2, a rear wall 3 and relative pair of sidewalls 4,5.The position 6 that just listens/see exemplarily is illustrated in the central authorities in room.

One image display screen 7 is placed on the antetheca 2 between two parties, and it can be the combining form of projection screen and the plain edition resonance flat-plate loudspeaker that is called distributed mode speaker described in WO97/09842.

Corresponding front is a pair of and the back is a pair of is contained in respectively on the position of the front and back that also is located at the position 6 of listening on the corresponding sidewall 4,5 respectively by supporting 22 (see figure 4)s for the resonance flat-plate loudspeaker 8,9 of rectangle and 10,11 substantially.

These loud speakers can be the distributed mode speakers described in WO97/09842, arrange each loud speaker 8,9,10,11 and be installed on the wall, make a dull and stereotyped vertical edges adjacent, so that dull and stereotyped can forwarding to and wall use location 13 at angle around axle from the deposit position concordant 12 with wall with wall.The different use location of loudspeaker panel 8,9,10,11 is represented with chain-dotted line and is identified with 14.This layout makes each loudspeaker panel and wall enough closely with the sound coupling of formation with wall, so that in use, the sign size of each loud speaker is doubled effectively owing to sound mirror reflection 15.See Fig. 2.

This implementation at installation distributed mode speaker on the wall makes the visually accessible or infringement of the wall 2 as focus in the room.So the edge of the loudspeaker panel 8,9,10,11 of place suggestion is installed as the speaker operation axis that the audience brings line bearing (back in line).

Test result shows, utilizes the design of small distributed loudspeaker panel, has improved the transmission of the sound in the room, and has obtained superior sound quality.

In the application of home theater, the shape that meets at right angles be installed in distributed mode speaker on the sidewall provide with recommended be used to produce desirable around the very approaching effect of the sound dipole of sound field.

Fig. 3 has shown the room of an essentially rectangular, and this room has the ceiling 16 that

adjacent wall

2,4 and is equipped with the resonance flat-plate loudspeaker 17 of essentially rectangular on it.This loud speaker 16 for example is the plain edition distributed mode speaker described in the WO97/09842.

Loud speaker 17 is installed on the ceiling 16 by hinging manner by a limit, so that this limit and ceiling are adjacent, and makes loud speaker rotate to the deposit position concordant with ceiling with the vertically extending use location of ceiling around axis substantially from it.Employed other positions, promptly centre position 18 and 19 with chain-dotted line represent and with 20 the sign.The resonance flat-plate loudspeaker is close to ceiling and installs and to mean on sound upper speaker and border by the ceiling representative and be coupled, thereby in use, by sound mirror reflection 21 the sign size of loud speaker is doubled effectively.

In Fig. 4, shown a kind of loud speaker supporting, can be fixed on the border to the resonance flat-plate loudspeaker of form shown in Fig. 3 at Fig. 1 by it, on the wall or ceiling as the room.What this supporting 23 comprised tabular wall bracket form is used for fixing wall or other borderline device 23, and wall bracket can be fixed on installed position by traditional approach by securing member (not shown) such as screws.Wall bracket 22 has a pair of protrusion tab that is separated from each other 24, has joint pin 25 on it.The resonance flat-plate loudspeaker, the loud speaker shown in 8,9,10 and 11 among Fig. 1 to 3 for example, in any easy mode, as by clamp, by securing member or by mode arbitrarily such as bonding, be fixed in joint pin 25.In this manner, loudspeaker panel can be rotated between the position shown in the solid line and static or deposit position of representing with chain-dotted line 12 concordant with boundary face and position therebetween.With the thumbscrew 26 that is positioned at joint pin 25 ends frictional force is applied on the hinge so that loudspeaker panel can remain on user-selected position.

Thereby the application has proposed distributed mode speaker is placed on or near a suitable boundary, meets at right angles or greater than 10 ° angular range, closely contacts with the border by a limit with retive boundary.This angle can be set easily by the user, for example stablizes hinge by the friction that connects wall bracket and flat-plate loudspeaker or other adjusts azimuthal method.

Advantage of the present invention comprises: (1) user's capable of regulating boundary alignment form and working shaft. (2) border of sound power strengthens, and makes wall make the sound strengthen 3dB as an imaging plane. (3) by effectively doubling the area as the flat board of low frequency source, low frequency is strengthened. (4) thus can adjust the balance of tone and directionality obtains in the position of listening by location panel

Best in quality. (5) can provide the suitable power for user/hearer to have zero point by location panel

Effect ground reduces the compartmentalization of sound, and also can improve the generation of diffuse sound field. This is at home theater

Application in particularly important. (6) dull and stereotyped in that the time spent can not turn up to improve clean and tidy and the chamber appearance.

Thereby the invention provides a kind of particularly effect of distributed radiator of flat-plate loudspeaker that strengthens And be convenient to simultaneously the straightforward procedure that it uses and deposit in home environment for example.

Claims

1. a method of operating the resonance flat-plate loudspeaker arranges that loud speaker and border produce the coupling on the sound thereby be included in boundary vicinity, and makes the plane of loudspeaker panel and border at angle.

2. the method described in claim 1, wherein this angle is greater than 10 °.

3. the method described in claim 1 or 2 is included in and moves this plate between loudspeaker panel off-position parallel and adjacent with the border and loudspeaker panel and the service position at angle, border.

4. resonance flat-plate loudspeaker supporting, comprise the device that engages and support supported loud speaker, be used for the device that engages and be fixed thereon with borders such as wall or ceilings, and the device that correspondingly connects loud speaker and border coupling device, thereby loud speaker is supported on adjacent with the border and with its position at angle, loud speaker is coupled with the border on sound.

5. the supporting described in claim 4, wherein jockey is to make the loudspeaker panel can be from moving to the device of the service position of extending at angle with the border with the concordant substantially deposit position in border.

6. the supporting described in claim 5, wherein jockey comprises a hinge.

7. the supporting described in claim 6 comprises being used to stop hinge movement to prevent the device of unexpected relative motion.

8. the supporting described in each of claim 4 to 7, wherein the border coupling device comprises a wall bracket.

9. the supporting described in each of claim 4 to 8, wherein loud speaker is a kind of distributed radiator loud speaker.

10. combined system of flat-plate loudspeaker and the supporting described in each of claim 4 to 9 that resonates.