Acoustic and illuminating ceiling panel

Abstract

An acoustic and illuminating ceiling panel includes a layer of acoustic absorbent material, the layer including a main inner face intended to be pointed toward the inside of the room, and light sources on the main inner face that is optionally covered by a voile fabric and/or coated, with a paint, wherein the light sources include organic light-emitting diode (OLED) modules with a luminous efficacy greater than or equal to 60 lm/W, and wherein a number and size of the OLED modules are adapted so that the ceiling panel provides an acoustic absorption coefficient w greater than or equal to 0.7.

Claims

1. An acoustic and illuminating ceiling panel comprising a layer of acoustic absorbent material, the layer comprising a main inner face intended to be pointed toward the inside of the room, and light sources on the main inner face, wherein said light sources comprise organic light-emitting diode (OLED) modules with a luminous efficacy greater than or equal to 60 lm/W, and wherein a number and size of the OLED modules are adapted so that the ceiling panel provides an acoustic absorption coefficient aw greater than or equal to 0.7, wherein the main inner face comprises a textile bearing electrically conductive threads having a diameter of at most 1 mm, having a low-voltage power supply of at most 50 V, for said OLED modules, said OLED modules being on said textile in electrical contact with the electrically conductive threads.

2. The acoustic and illuminating ceiling panel as claimed in claim 1, wherein the ceiling panel complies with class A according to the standard EN ISO 11654.

3. The acoustic and illuminating ceiling panel as claimed in claim 1, wherein the OLED modules are in contact via the corners only or are spaced apart from one another.

4. The acoustic and illuminating ceiling panel as claimed in claim 1, wherein a combined degree of coverage of said OLED modules is at most 30%.

5. The acoustic and illuminating ceiling panel as claimed in claim 1, wherein the OLED modules are uniformly distributed over the inner face.

6. The acoustic and illuminating ceiling panel as claimed in claim 1, wherein the OLED modules each have a luminance of at least 2500 cd/m.sup.2 and an active surface area of at least 0.02 m.sup.2 and of at most 0.29 m.sup.2 and wherein a number of said OLED modules on the panel is at least 5 and at most 50.

7. The acoustic and illuminating ceiling panel as claimed in claim 1, wherein said organic light-emitting diode (OLED) modules comprises a first series of OLED modules, and a second series of OLED modules of smaller active surface area.

8. The acoustic and illuminating ceiling panel as claimed in claim 1, wherein arranged on the main inner face is a plurality of inorganic light-emitting diodes (LEDs), which are spaced apart from one another.

9. The acoustic and illuminating ceiling panel as claimed in claim 1, wherein the electrically conductive threads are covered by additional textile threads.

10. The acoustic and illuminating ceiling panel as claimed in claim 1, comprising a first zone of at least two electrical contacts on a first border of the main inner face and extending over a first edge of the panel.

11. The acoustic and illuminating ceiling panel as claimed in claim 1, wherein the textile comprises at least one reinforcing zone and/or one positioning marker of one of said OLED modules or of an LED or of another electronic component.

12. The acoustic and illuminating ceiling panel as claimed in claim 1, comprising an acoustic surfacing including a voile fabric on the outer face on a side opposite the main inner face.

13. An acoustic ceiling comprising a plurality of acoustic and illuminating ceiling panels as claimed in claim 1 providing an illumination of at least 300 lux and of at most 900 lux.

14. An acoustic ceiling comprising a plurality of acoustic ceiling panels wherein, in a region of the ceiling defined by at least 9 panels or over the whole of the ceiling, the acoustic ceiling comprises acoustic and illuminating ceiling panels as claimed in claim 1.

15. An acoustic ceiling comprising a plurality of acoustic ceiling panels wherein, in a reference region of the ceiling defined by at least 9 panels or over the whole of the ceiling, the surface occupied by acoustic and illuminating ceiling panels as claimed in claim 1 is at most 70% of the reference surface.

16. An acoustic ceiling comprising a plurality of acoustic ceiling panels as claimed in claim 1, wherein two adjacent and separated panels comprise, on their respective edges that are opposite, electrical contacts that are in electrical connection with a metal framework that comprises an electrically conductive zone oriented toward the outer face capable of electrically interconnecting said acoustic panels.

17. An acoustic ceiling comprising a plurality of acoustic ceiling panels as claimed in claim 1, wherein a first edge of a first acoustic panel is in contact with a second edge of a second acoustic panel, the first and second edges bearing electrical contacts that form an electrical continuity by contact for the transmission of control, power supply or data signals.

18. The acoustic and illuminating ceiling panel as claimed in claim 1, wherein the main inner face is covered by a voile fabric and/or coated with a paint.

19. An acoustic and illuminating ceiling panel comprising a layer of acoustic absorbent material, the layer comprising a main inner face intended to be pointed toward the inside of the room, and light sources on the main inner face, wherein said light sources comprise organic light-emitting diode (OLED) modules with a luminous efficacy greater than or equal to 60 lm/W, wherein the main inner face comprises a textile bearing electrically conductive threads, having a low-voltage power supply of at most 50 V, for said OLED modules, said OLED modules being on said textile in electrical contact with the electrically conductive threads.

20. The acoustic and illuminating ceiling panel as claimed in claim 19, wherein the electrically conductive threads have a diameter of at most 1 mm.

Description

(1) The features and advantages of the invention will become apparent in the following description of three embodiments of an acoustic absorbent element and of a ceiling assembly according to the invention, which is given solely by way of example and with reference to the appended drawings, in which:

(2) each FIGS. 1, 2, 3 and 3 is a schematic front view of the room side (inner face) of an acoustic and illuminating ceiling panel with conventional visible framework comprising an assembly of the acoustic and illuminating ceiling panels in accordance with embodiments of the invention;

(3) each FIGS. 4a, 4b and 4c is a schematic front view of the room side (inner face) of an acoustic and illuminating ceiling panel in accordance with embodiments of the invention;

(4) FIG. 5 is a partial side view (photo) in perspective of a room with an acoustic and illuminating ceiling with concealed framework comprising an assembly of the acoustic and illuminating ceiling panels in accordance with the invention;

(5) FIG. 6a is a partial schematic cross-sectional view of two panels with their framework that is also used for the electrical interconnection;

(6) FIG. 6b is a partial front view (photo) of the room side (inner face) of an acoustic and illuminating ceiling panel with concealed framework comprising an assembly of the acoustic and illuminating ceiling panels in accordance with the invention that are abutting;

(7) FIG. 7 is a detail view and front view showing, on an inner face, electrically conductive threads and embroidered masking textile threads, and

(8) FIG. 8 indicates, for rectangular (square) OLED modules of 10 cm and with a luminance of 3000 cd/m.sup.2, the illumination in lux as a function of the % of surface area occupied by all of the OLED modules in the ceiling (or in a given region of the ceiling).

(9) For the sake of clarity, the relative dimensions of the various elements have not been strictly respected, in particular in FIGS. 1, 2 and 3.

(10) The ceiling 1000 represented in FIG. 1, in accordance with a first embodiment of the invention, comprises 16 illuminating acoustic ceiling panels 100, suspended from the ceiling of the room by means of hangers 20, 20 forming a grid.

(11) The illuminating acoustic panel 100, here of square shape, of 600 mm by 600 mm, preferably comprises a layer of acoustic absorbent material 105 with an inner face (which is bare or coated with layer(s) for example with a voile fabric and with a layer of paint 106a) oriented toward the room bearing 9 OLED modules 2 that are separated and regularly distributed (Lambertian source preferably emitting in the white), that are rectangular (square) here, preferably of less than 20 cm by less than 20 cm, for example of 10 cm by 10 cm. By way of example, in this first embodiment, it is a panel with a layer consisting of compressed mineral wool and painted white, having a thickness of 40 mm. Alternatively, the layer is a layer of rock wool having a density of 60 kg/m.sup.3 and a thickness of 30 mm. The panel may also be a wet felt.

(12) Each OLED module 2 is for example received in a blind opening made in the thickness of the layer between the main inner face 11 and the main outer face of the layer 3. It is a notch made on the inner face side. The OLED modules 2 are for example connected via the rear (outer main face side) to a power supply present in the building.

(13) A through-hole in the thickness of the layer may be made for the power supply.

(14) The OLED modules 2 may be flush with the inner face outside of the notch. The OLED modules 2 occupy 25% of the surface area of the panel.

(15) The acoustic panels occupy 100% of the ceiling here. With a luminance of 3000 cd/m.sup.2, the lighting obtained is of the order of 1355 lux, which is very high. It is preferred to reduce the luminance and/or the number of OLED modules (for example to 4) better still preferably the number of illuminating panels is reduced in favor of conventional panels.

(16) The ceiling 1000 represented in FIG. 2, in accordance with a second embodiment of the invention, comprises two series of 8 illuminating acoustic ceiling panels 100,101 (alternating series), suspended from the ceiling of the room by means of hangers 20,20 forming a grid.

(17) In the first series, as in FIG. 1, the illuminating acoustic panel 100, here of square shape, of 600 mm by 600 mm, bears 9 OLED modules 2 that are separated and regularly distributed, here that are rectangular (square), preferably of less than 20 cm by less than 20 cm, for example of 10 cm by 10 cm.

(18) In the second series, the illuminating acoustic panel 101, here of square shape, of 600 mm by 600 mm, bears 5 OLED modules 2 that are separated and distributed like the 5 side of a die, here rectangular (square) OLEDs, preferably of less than 20 cm by less than 20 cm, for example of 10 cm by 10 cm.

(19) The ceiling 1000 represented in FIG. 3, in accordance with one embodiment of the invention, comprises some illuminating acoustic ceiling panels 100, 101 and some conventional ceiling panels 102 (conventional and illuminating panels in alternation), suspended from the ceiling of the room by means of hangers 20,20 forming a grid. The hangers 20 are fastened for example to the ends of the two hanger bars attached to an outer surface (not visible) of the panel.

(20) In the first series, as in FIG. 1, the illuminating acoustic panel 100, here of square shape, of 600 mm by 600 mm, bears 9 OLED modules 2 that are separated and regularly distributed, here that are rectangular (square), preferably of less than 20 cm by less than 20 cm, for example of 10 cm by 10 cm. If the panels are numbered from the first line (from left to right) down to the last line, these are the panels nos. 1, 3, 6, 8, 9, 11, 14 and 16.

(21) In the second series, the illuminating acoustic panel 101, here of square shape, of 600 mm by 600 mm, bears 2 OLED modules 2 that are separated and distributed like the 5 side of a die, here rectangular (square) OLEDs, preferably of less than 20 cm by less than 20 cm, for example of 10 cm by 10 cm. These are the panels nos. 4 and 13.

(22) There are six conventional acoustic panels 102. These are the panels nos. 2, 5, 7, 10, 12 and 15.

(23) The following table 1 indicates, for rectangular (square) OLED modules of 10 cm by 10 cm and with a luminance of 3000 cd/m.sup.2, the illumination in lux as a function of the % of surface area occupied by all of the OLED modules in the ceiling (or in a given region of the ceiling).

(24) In FIG. 8, the preferred range is a (bold) box with an illumination between 300 lux and 843 lux.

(25) The embodiments that are even more preferred are highlighted.

(26) The following table 2 indicates, for rectangular OLED modules having various surface area sizes and a luminance of 3000 cd/m.sup.2, a possible number of OLEDs per panel. The technical edges are for example at most 1 mm.

(27) TABLE-US-00001 TABLE 2 Size Number of OLEDs per panel 10 cm 10 cm 9 8 7 6 5 4 Surface area 0.250 0.222 0.194 0.167 0.139 0.111 occupied on the panel Flux per panel 675 600 525 450 375 300 (lm)
Table 1

(28) The ceiling 1001 represented in FIG. 3, in accordance with one preferred embodiment in connection with FIG. 8 (and table 1, first row), comprises, in a rectangular room of 5.4 m by 3.6 m approximately, 54 acoustic ceiling panels 100, 102, each of 600 mm by 600 mm including:

(29) 22 illuminating panels 100 with OLED modules of 10 cm by 10 cm with 3000 cd/m.sup.2;

(30) and 32 conventional panels 102, 26 of which form a peripheral frame and 6 forming two L shapes (with three panels) spaced apart by two illuminating panels.

(31) This corresponds to a degree of coverage of 40% of the ceiling for the illuminating panels.

(32) OLED modules of 10 cm by 10 cm are chosen for example as distributed in the following FIG. 4a, 4b or 4c.

(33) The ceiling obtained is efficient both acoustically (class A) and in terms of lighting (at least 300 lux).

(34) FIG. 4a is a schematic (inner face) front view of the room side of an acoustic and illuminating ceiling panel 103 in accordance with the invention having 9 OLED modules 2 that are separated and regularly distributed (Lambertian source preferably emitting in the white), that are rectangular (square) here, preferably of less than 20 cm by less than 20 cm, for example of 10 cm by 10 cm.

(35) FIG. 4b is a schematic (inner face) front view of the room side of an acoustic and illuminating ceiling panel 103 in accordance with the invention having 12 OLED modules 2 that are separated and regularly distributed (Lambertian source preferably emitting in the white), that are rectangular (square) here, preferably of less than 20 cm by less than 20 cm, for example of 10 cm by 10 cm.

(36) FIG. 4c is a schematic (inner face) front view of the room side of an acoustic and illuminating ceiling panel 104 in accordance with the invention having 5 OLED modules 2 that are in contact only by the corners (via one corner here) at the center of the panel (Lambertian source preferably emitting in the white), that are rectangular (square) here, preferably of less than 20 cm by less than 20 cm, for example of 10 cm by 10 cm.

(37) FIG. 5 is a partial side view (photo) in perspective of a room 2000 with an acoustic and illuminating ceiling 1000 with concealed metal (steel, etc.) framework (in particular concealed in a longitudinal notch on the edge of the panels) comprising an assembly of the acoustic and illuminating ceiling panels with abutting edges, which panels are in accordance with the invention.

(38) This may be a ceiling such as the Focus Ds from Ecophon.

(39) Each panel comprises OLED modules 2, 2 in two sizes, for example 10 cm by 10 cm and 5 cm by 5 cm and even also LEDs 22 and even a control unit 4 for example mains powered by the plenum (via a hole in the panel).

(40) As indicated in FIG. 6b, showing four abutting acoustic and illuminating panels 100,100, each may comprise four electrical contact zones 30a, 30b, 30c, 30d on the four borders of the inner face and extending over the edges 12.

(41) Thus, an electrical continuity for transmitting any electrical (power supply, data, control) signal is achieved panel by panel.

(42) It is possible to replace some panels with panels without lighting sources but to keep the electrical contacts.

(43) Also shown are the conductive pathways 41 (the thinnest possible wires or strips) leading to the OLEDs, to the LEDs or to the control unit 4.

(44) In one alternative shown in FIG. 6a, the edges 12 are not in contact, and two acoustic panels 100 (at least one being illuminating according to the invention) are suspended by a T-shape metal framework 20 (bar of the T toward the plenum, exterior side of the room) here covered with an electrical conductor 20a on the side oriented with the outer face 13 on the plenum side. The metal framework 20 comprises an electrically conductive zone 21 oriented toward the outer face 13 capable of electrically interconnecting said acoustic panels.

(45) Each panel comprises a layer of acoustic absorbent material 105 and has the inner face 11 with electrical contacts 5 extending over the edges 12, then in connection with the electrical conductor 20a. The panel 100 also comprises an acoustic surfacing including a voile fabric 106b on the outer face 13 on the side opposite the main inner face 11.
The inner face 11 may have a textile 5 fastened by any means, local or extensive, and extending to the edge 12 including into a longitudinal notch (rectangular section in side profile here) bearing electrical conductors such as metal wires preferably of at most 5 mm, or 2 mm, or 1 mm extending up to the electrical contacts. Here the edges 12 are not in contact.

(46) FIG. 7 is a detail view and front view of a panel according to the invention showing, on an inner face 11, a textile bearing electrically conductive threads 41 embroidered or sewn on top and textile threads 45 embroidered or sewn for masking electrically conductive threads (see the zoom) conveying the signals to the OLEDs 2, 2 of different sizes or several LEDs 22. Beneath the LEDS there may be textile reinforcing zones 50 or contact zones or zones for marking the positioning of the LEDS.

(47) The invention is not limited to the examples described and represented.