EP3346875A1

EP3346875A1 - Glass ceramic worktop

Info

Publication number: EP3346875A1
Application number: EP16775790.5A
Authority: EP
Inventors: Grégory DEBREYER; Franck Demol; Michaël RAVEL; Nicolas Roux; Pablo Vilato
Original assignee: Eurokera SNC
Current assignee: Eurokera SNC
Priority date: 2015-09-08
Filing date: 2016-09-06
Publication date: 2018-07-18
Also published as: US20180242733A1; CN107920660A; KR20180050312A; FR3040608B1; WO2017042470A1; JP2018538013A; DE202016008268U1; FR3040608A1

Abstract

The present invention concerns a piece of furniture and/or household equipment, that is advantageously interactive, comprising: - at least one worktop formed from at least one substrate made from monolithic glass material having a surface area greater than 0.7 m², said substrate having brightness L* less than 10, haze less than 30%, and light transmission T_L less than 10%, - at least one light source, in particular intended to produce one or more areas or one or more elements or displays of the substrate, said source being located, in particular, under the substrate and being concealed by same when said source is switched off, - at least one interface for communication with at least one element of the worktop such as the light source or sources, and/or if applicable with at least one external element for wireless communication, said equipment being further free of heating elements.

Description

WORK PLAN IN VITROCERAMIC

The present invention relates to a worktop, or worktable or countertop or furniture, formed of at least one large plate positioned or intended to be positioned horizontally on one or more support elements (cabinet of a piece of furniture, foot ( s) support (s)) to provide a stable surface for different uses. In particular, the present invention relates to a table or a piece of furniture having a surface or plate (generally horizontal in the position of use) capable of simultaneously or successively allowing different activities and / or support of objects (this surface or plate thus forming what is called a work plan).

The materials usually used for making worktops are for example wood, quartz, Corian®, etc. For cooking food, there are also large cooking surfaces in kitchens, especially for professional use, these plates are usually metal and / or composite. In particular, there are multilayer panels, based on layers or ceramic materials such as sandstone, layers or aluminum-type metallic materials and layers or insulating plastic materials Bakelite type, these panels generally having a significant thickness (of order of 12 mm for example) and being of complex construction.

At the same time, hobs made of vitroceramic or reinforced glass type materials, of more limited dimensions (in particular with a surface area generally less than 0.4 m ² , top surface plates that may be more difficult to obtain by the methods usually used, and which may be pose problems in terms of flatness, handling, etc.), exist for uses in particular domestic, the use of glass ceramic material has become widespread in recent years for the hob, especially because of the performance of this material for this use and the attractive appearance of the plates made.

There are currently different types of glass ceramic plates, each variant being the result of important studies and many tests, being given that it is very difficult to make modifications on these plates and / or on their process of obtaining without risking an adverse effect on the sought-after properties: to be able to be used as a hotplate, a vitroceramic plate must generally present a transmission in the wavelengths of the visible range both low enough to mask at least some of the heating elements underlying the rest and high enough that, depending on the case (radiant heating, induction heating, etc.), the user can visually detect the operating heating elements for safety purposes; it must also have a high transmission in the wavelengths of the infrared range in the case in particular radiant hob plates. The plates thus designed are intended exclusively for use as hobs and are not traditionally intended to receive objects other than heat-resistant utensils used for cooking food, nor intended for exercise other activities than cooking food.

The present invention has sought to expand the range of existing household equipment products, for domestic or professional use, by developing a new type of interactive products for more varied uses.

This goal has been achieved by the new equipment or article or installation according to the invention, advantageously interactive, this furniture / household (or furniture) equipment comprising:

at least one plane (or counter or table) of work formed of at least one substrate (in particular a plate or surface or plate) in (or (based on) one or essentially consisting of a) glass material (of preferably glass-ceramic) monolithic (or monobloc or one piece), preferably substantially plane, surface (length by width of its face of larger dimensions) greater than 0.7 m ² , said substrate having a brightness L ^* less than 10 , a blur of less than 30%, and a light transmission T _L less than 10%,

at least one light source, in particular intended to materialize (make visible) one or more zones or one or more elements or displays of the substrate, in particular by light transmission through the substrate, this source being in particular under the substrate and being hidden by this one when this source is not in operation / is idle,

at least one communication interface with at least one element of the plane (for example with the light source (s)) and / or possibly with at least one external element (out of the plane), for example with a module (a unit, an external device) for wireless communication,

said equipment being furthermore devoid of heating element (s).

The product developed according to the invention meets the desired purpose, the present invention thus providing a new interactive equipment (allowing in particular the activation of functions such as lighting and the display of zones or data) that can be used in any living room, the work plan can be part of a solid furniture or not, a table, a counter, etc., this work plan being mounted or able to be mounted horizontally on (especially at the top of ) one or more support elements (cabinet of a piece of furniture, support leg (s)) to provide a stable surface for different uses, the worktop or the equipment according to the invention having a superior surface Continuous capable of allowing simultaneously or successively activities (such as work, games, reading, etc.), the support of objects (such as papers, computers, vases, dishes, etc.), and the installation of containers that can be hot without damaging the surface of the worktop is not affected and there is no risk of burns by the in situ activation of the heating elements. Failure to provide built-in heating elements is an additional safety feature that makes the use of the equipment safer and extends the life of other potentially heat sensitive equipment components. , in particular, may be sensitive to the prolonged exposure to heat that may occur during the repeated implementation of the heating elements. Unlike the traditional use of ceramic glass materials, traditionally used as hotplates or products to withstand high temperatures (such as firewalls), this equipment incorporates this material conventional high temperature, in a cons-use / use to the contrary, where it is not associated with heating elements, nor exposed to various fires, while still having various advantages making it particularly appropriate for this new application or the new equipment. Surprisingly, the use of a glass-ceramic surface as a simple surface of conviviality without elements of heating is particularly advantageous (especially in terms of maintenance, durability whatever the conditions of use, etc.).

More generally, the invention also relates to a work surface formed of at least one substrate of monolithic glass material with an area greater than 0.7 m ² , said substrate having a brightness L ^{* of} less than 10, a blur of less than 30%, and a light transmission T _L less than 10%, this work plan being intended to equip a furniture or interactive multi-purpose equipment (intended for several uses as listed in the previous paragraph), in particular as defined above according to the invention (without heating element (s)).

The invention also relates to the use of a substrate, in particular a plate, made of monolithic glass material having an area greater than 0.7 m ² , said substrate having a luminosity L ^{* of} less than 10, a blur of less than 30%, and a light transmission T _{L of} less than 10%, as a multi-purpose interactive work surface as mentioned in the above paragraphs.

As indicated above, the work surface is formed of a substrate or plate of monolithic glass material (the glass material having been formed in one piece / in one piece, even if the substrate may, if necessary, have recesses, generally used in the already formed part, for aesthetic or functional purposes) of large dimensions, the advantage of such a monolithic plate of large dimensions being in particular to provide a predominantly continuous / uniform surface / without connections, aesthetic and easy maintenance, as well as greater comfort of use and greater safety (in terms of sealing in the event of a liquid spill, etc.), etc. The substrate consists essentially, if not solely, of the glass material, this substrate / glass material possibly being able to be provided with decorative or functional coatings of small thickness (in particular of the order of a few tens of nanometers to a few hundred microns, even more), for example in enamel, paint, thin layers, etc., as specified later.

Unlike the use in vitroceramics in particular, this (substrate) glass material is large, its surface (corresponding to the product of its length by its width for its face of larger dimensions - generally its upper face, intended to be apparent and to support items (household or work) being larger than 0.7 m ² , preferably greater than 0.9 m ² , especially greater than 1 m ² , in particular greater than or equal to 2 m ² . However, the manufacture of large plates, in the case of vitroceramic in particular, poses many problems in terms of flatness and handling. In the present invention, a plate of large dimensions, however having a good flatness, can nevertheless be advantageously obtained by reducing the speed of passage (or lengthening the arch of ceramization or increasing the residence time in the arch) compared to the speed (or the length of the arch or the standard time) usually used to obtain vitroceramic plates of usual dimensions less than 0.4 m ² , as explained later in the method according to the invention.

In the present invention, the glass material substrate thus advantageously forms the major part (at least 50%), or even all, of the work surface or of its surface or face intended to serve a variety of uses (generally the upper surface in position d 'use). In particular, the substrate made of glass material advantageously occupies in the present invention at least 50%, especially at least 70%, in particular at least 90% of the surface (measured generally on the upper face, intended to be visible and to serve as support of the worktop, and usually it occupies the entire surface of the worktop, the surface of the worktop being understood as the full surface occupied by the worktop (area it occupies excluding that ( s) occupied by possible recesses (such as a recess in the plan to integrate a sink)) on the face considered (generally its upper face, intended to be apparent and to serve as support of articles), even meaning in particular as the overall area corresponding to the product of the length of the worktop by its width). Depending on the type of furniture (particularly in the case of a piece of furniture where the work surface occupies all of one of its faces, generally the upper face, for example a table, a central island or a simple worktop) the glass material substrate can thus also occupy at least 50%, in particular at least 70%, in particular at least 90% of the surface of a face, in particular of the upper face (in the use position), the furniture, even occupy all said surface.

Advantageously, the glass material substrate forms at least 50%, especially at least 70%, in particular at least 90%, or even all, of the work surface, or in other words, the work surface (generally opposite upper or upper part of the furniture) is mainly (at least 50%, in particular at least 70%, in particular at least 90%), in particular entirely (or solely) formed of (or consisting of, or consists of the ) glass material substrate (this glass material preferably being glass-ceramic).

The substrate / glass material according to the invention is advantageously plane (or predominantly or almost planar), and in particular has a flatness (height between the highest point and the lowest point of the substrate relative to the mean plane of the substrate, with the exception of possible voluntary deformations made on the substrate for aesthetic or functional purposes) less than 0.1% of the diagonal of the substrate, and preferably less than 3 mm, especially less than 2 mm, in particular less than 1 mm. mm, or even of the order of zero, depending on the size / surface / diagonal of the substrate, the flatness being measured using a reference ondulometer SurFiat marketed by Visuol. The substrate is generally of geometric shape, in particular rectangular, even square, or even circular or oval, etc., and generally has an "upper" face (visible face) in the use position, another "lower" face (generally hidden , in the frame or cabinet of the furniture incorporating the worktop) in the use position, and a slice (or edge or thickness). The upper face is generally flat and smooth but may also have at least one raised zone and / or at least one hollow zone and / or at least one opening and / or beveled edges (these shapes having been added during manufacture of the substrate, for example by rolling or collapse or pressing, etc., or having been added in recovery), etc., these shape variations advantageously constituting continuous variations of the plate (without changing materials or connections). The lower face may be particularly smooth or provided with pins increasing its mechanical strength and obtained for example by rolling.

The thickness of the monolithic glass material substrate is generally at least 2 mm, in particular at least 2.5 mm, in particular is of the order of 3 to 30 mm, and advantageously is less than 1 mm, in particular is of the order of 3 to 15 mm, especially 3 to 10 mm.

The glass material of the substrate used is advantageously resistant to high temperature and / or has a coefficient of expansion that is zero or almost zero (by example below 15.10 ^"7 K ^{" 1} ), in particular is advantageously glass-ceramic or reinforced glass (especially chemically hardened or thermally toughened). Preferably, the substrate is a glass-ceramic substrate. As defined according to the invention, the substrate / glass material is advantageously weakly transmissive, not very diffusing and of a dark color (defined by the brightness L ^* ), in particular of black or dark brown color, this material allowing in particular a transmission display light through the substrate, as specified below.

The glass-ceramic used may in particular be of composition as described in the patent applications published under the following numbers: WO2012156444, WO2012001300, DE20201201 181 1, this glass-ceramic being in particular a lithium aluminosilicate glass-ceramic.

For example, it is advantageous to use a glass-ceramic comprising the following constituents and / or obtained by ceramizing from a glass of the following composition, within the following limits expressed in percentages by weight: SiO ₂ : 52-75%; AI ₂ O ₃ : 18-27%; Li ₂ O: 2.5 - 5.5%; K ₂ O: 0 - 3%; Na ₂ O: 0 - 3%; : ZnO: 0 - 3.5%; MgO: 0 - 3%; CaO: 0 - 2.5%; BaO: 0 - 3.5%; SrO: 0 - 2%; TiO ₂ : 1, 2 - 5.5%; ZrO ₂ : 0 - 3%; P ₂ O ₅ : 0 - 8%, and preferably within the limits hereinafter expressed in percentages by weight: SiO ₂ : 64 - 70%; AI ₂ O ₃ : 18 - 21%; Li ₂ O: 2.5 - 3.9%; K ₂ O: 0-1.0%; Na ₂ O: 0-1.0%; ZnO: 1, 2 - 2.8%; MgO: 0.20-1.5%; CaO: 0 - 1%; BaO: 0 - 3%; SrO: 0-1.4%; TiO ₂ : 1.8- 3.2%; ZrO ₂ : 1.0-0.5%.

The glass-ceramic can be refined with arsenic (that is to say from (mother glass of) composition comprising of the order of 0.5% to 1.5% by weight of arsenic oxide (expressed as As ₂ O ₃ ), or may be unrefined with arsenic (in particular having an arsenic oxides content of less than 0.2%, in particular less than 0.1%, or even zero) or refined with tin or refined with x) sulphide (s), and can be obtained by rolling or floating.

The glass material may also be a non-ceramic tempered glass, for example a lithium aluminosilicate hardened as described in the patent applications published under the following numbers: FR1060677, WO2012080672, or in the application filed in France under number 1363157, or another tempered glass of another type (soda-lime, borosilicate, etc.), for example as described in the application published under the number WO2012146860. The glass-ceramic or tempered glass are obtained by the respective processes described in the aforementioned documents by using the cycles and processing temperatures to obtain the glass material having the selected characteristics given in the definition of the invention. In the case of glass-ceramics, these methods are preferably modified by reducing the rate of passage by at least 25%, preferably by at least 50%, or by increasing the length of the ceramic arch or the residence time. in said arch by at least 25%, preferably at least 50%, respectively, with respect to the speeds, lengths and times normally used, in order to obtain a large planar substrate as required according to the invention, as explained later.

As defined according to the invention, the substrate forming the work plane is selected so as to have a brightness L ^{* of} less than 10, preferably less than 7, a blur of less than 30%, in particular less than 28%, or even less at 20%, and a light transmission T _{L of} less than 10%, in particular less than or equal to 8%, this light transmission being preferentially non-zero (greater than 0%) in the embodiment of the invention allowing in particular a luminous display on the surface of the substrate by light sources placed below. The substrate has these characteristics on the essential (in particular on at least 80%, or even 100%) of its surface, with the exception of any localized decorations (for example enamel) or localized components applied to its surface. These properties are generally those of the glass material forming the substrate itself, without the presence of any coating, but where appropriate may result from the combination of the glass material and a coating applied to the bulk of the glass. one and / or the other of its main faces. Advantageously, these are the intrinsic characteristics of the glass material substrate, that is to say that said glass material substrate has these characteristics in itself without the presence of any coating.

The brightness L ^* is a component defined in the CIE colorimetric system and is evaluated in a known manner, in particular using a Byk-Gardner Color Guide 45/0 colorimeter (reflection colorimetry) on the upper face of the substrate placed on opaque white background. The blur measures the level of light scattering and is defined, in the context of the invention, as the ratio of the diffuse transmission on the total transmission at a wavelength equal to 550 nm, this blur being evaluated for example at using the spectrophotometer with an integrating sphere used for light transmission measurements.

The light transmission T _L is measured according to ISO 9050: 2003 using illuminant D65, and is the total transmission (integrated in the visible range), taking into account both the direct transmission and the possible transmission. diffuse, the measurement being made for example using a spectrophotometer provided with an integrating sphere, the measurement at a given thickness then being converted, if necessary, to the reference thickness of 4 mm according to the ISO 9050 standard: 2003.

The substrate according to the invention as defined above is in particular of dark appearance, and is formed of a weakly transmissive and low diffusing material, in particular is of black or brown appearance, allowing in particular, in combination with sources illuminated below, to display bright areas or scenery, while masking any underlying elements. The glass material used also preferably has an indicator (or factor or coefficient) of opacity Ω less than 100, and advantageously greater than 93, in particular to enable said display by underlying sources in one embodiment of the invention. or a projection display as indicated later, this opacity indicator in the present invention being determined by the formula Ω = 100 - ΔΕ ^* and being evaluated by measuring (reflection colorimetry performed using a Byk-Gardner colorimeter) Color Guide 45/0) the color variation ΔΕ ^* , corresponding to the difference between the color, measured in reflection on the upper face of the substrate, for the substrate placed on an opaque black background and that for the substrate placed on an opaque white background ( ΔΕ ^* = ((L ^* -L _N _B ^*) ² + (a ^* _N -a ^* _B) ² + (b ^* -b _N _B ^*) ²⁾ ^½, L ^* _B, a ^* _B, b _B ^* being the colorimetric coordinates of the first measure on a white background and L _N ^* , a _N ^* , b _N ^* being those of the second measurement on a black background in the colorimetric system established in 1976 by the CIE).

The substrate is preferably based on a black glass ceramic generally comprising crystals of β-quartz structure within a residual vitreous phase, the absolute value of its coefficient of expansion being advantageously less than or equal to 15.10 ^"7 / ° C, or even 5.10 ^{" 7} / ° C, and having the characteristics mentioned above, such as the glass-ceramic plates sold under the name Kerablack + by the company Eurokera. In particular, it may be an arsenic-refined glass ceramic of composition as described in patent application EP0437228 or US5070045 or FR2657079, or a tin-refined glass-ceramic having an oxides content. arsenic less than 0.2% (or even less than 0.1%, or even less than or equal to 500 ppm, or even zero), for example of composition as described in patent application WO 2012/156444, or further refined to (x) sulfide (s) as described in patent application WO20080531 10.

If appropriate, the substrate may also comprise dyes, giving, for example, certain shades or hues, at levels of preference of less than 10% by weight, for example vanadium oxide, iron oxide, iron oxide, cobalt oxide, cerium oxide, selenium oxide, chromium oxide or even nickel oxide, copper oxide and / or manganese oxide, etc.

Various zones and / or elements and / or functions and / or decorations may be signaled by at least one light source as evoked in the definition of the invention, this source once activated enabling a luminous pattern to be displayed (in particular disk type, circle, cross, triangle, etc.) of color and / or fixed or variable dimensions. Other non-luminous patterns may also be permanently present (of any type, including non-geometrical decor, etc.), obtained in particular by deposition of layer (s) (in particular such (s) as used (s) for the decoration of glass-ceramics), for example enamel or possibly paint, on the surface of the plate (in particular on the upper face, or possibly lower depending on the type of coating).

In a preferred embodiment, one or more zones and / or elements and / or functions and / or decorations are indicated by, and / or highlighted by means of or by means of, at least one light source such as mentioned in the definition of the invention, on activation of said source, said source being placed under the substrate (in the use position) and being hidden by the latter at rest, said source allowing a light display by transmission through substrate / worktop. In another advantageous embodiment, the face, in particular upper (in position of use) or apparent, of the plate is coated with an opacifying coating, in particular an enamel or thin layers, the coverage rate of said opacifying coating in the coated zone being at least 5%, preferably at least 20%, in particular at least 45%, or even 100%, the enamel having the appropriate (in particular when the less than 100%) a pigment content of greater than 2% (relative to the rate of frit + pigment (s) in enamel), in particular greater than 5%, preferably greater than 10%, especially understood between 5 and 30%, and / or having a refractive index different from that of the substrate, and one or more zones and / or elements and / or functions and / or decorations are indicated by, and / or highlighted by, using or by means of, at least one light source as referred to in the definition of vention, on activation of said source, said source being above (in use position) or on the side of the apparent face of said plate (or on the side where the display is sought or to be seen) and allowing a projection light display (direct) on this screen surface.

One or more light sources may in particular make it possible to display means or control zones (in the form of keys, logos, or even keyboards, etc.), which can be activated for example by contact on the surface of the plane (using, for example, sensors below the surface) or at a distance (in particular by wireless communication), or even by a simple movement of the hand (by sensors located where appropriate on the outside and recording the movement, for example by triangulation, to convert it, to using an appropriate algorithm and interface, for example, to activate a function), or if necessary by placing a specific object at a given location on the plate. The light source (s) may also allow the display of sets, or various data (eg display of computer pages, recipes, etc.) downloaded for example by wireless communication using an appropriate interface and projected or transmitted from the light sources on the surface of the plate.

If necessary, the article according to the invention may comprise several light sources, for lighting of several areas or for the display of texts or complex decorations, or to homogenize the lighting, these sources can be arranged along different axes and angles of illumination to obtain the desired effect, without unwanted glare or shading. Particularly in the case of projection lighting on the screen plane, several sources are for example arranged so that the angle between each source (or between each element, for example mirror, sending the light to the work plane ) and the normal to the work plane is between 5 and 60 °, preferably between 30 and 45 ° to minimize the effects of shadows projected by a person operating on the work plan.

The light source (s) may advantageously be formed by light-emitting diodes, in particular when they are under the work surface, for reasons including space, efficiency, durability and resistance to environmental conditions.

These diodes are advantageously of chip type (s) semiconductor (s), mineral materials (LED or LED in English), emitting in particular in one direction, and can be encapsulated, that is to say include a semiconductor component conductor and an envelope (eg epoxy or nylon type resin), encapsulating the semiconductor component. These diodes may also be semiconductor chips without collimation lenses for example of the order of one hundred μιτι or mm, possibly with a minimal encapsulation (eg protection).

The diodes may optionally be carried by a support or strip or base, this base may have a surface (flat or inclined) treated and / or made reflective for a better light efficiency, for example coated with a lacquer or paint and / or mirror layer, and / or coupled to a white or metallic reflector to better direct the emitted radiation.

Where appropriate, organic light-emitting diodes (OLEDs) can also be used, consisting in particular of a superposition of organic semiconductor layers between electrodes, and producing different colors at the pixel following the path of electricity through the organic layers. . Other types of light sources may also be used, jointly or alternatively with the aforementioned diodes, for example halogen or incandescent lamps, lasers or liquid crystal displays, the sources possibly being used in combination with lenses or mirrors, etc. The assembly of each source or sources (to the plate or to another part of the equipment or to an external part (associated with the equipment), such as a rail or a device suspended above the worktop) can be done by welding, clipping, gluing, etc., if necessary via another element; for example, diodes can be mounted, welded on a support itself housed at the bottom of a metal profile, by clipping or gluing the profile. The positioning of the source or sources (with respect to the plate in particular) is adapted to allow a display through the substrate in the preferred embodiment where sources are under the plate, or to allow projection (especially from above ) on the screen plate in the case where the latter is coated with an opacifying coating and sources are on the side where the display is to be seen.

The sources, as well as their power supply and actuation, can be dissociated or not so as to allow simultaneous or individual illumination of the desired lighting zones, as required. Each source can be monochromatic (pure color) or polychromatic (synthetic color).

By "monochromatic light source" is meant a light source having a single emission peak in the range of visible wavelengths and such that the width of the peak varies from 1 to 100 nm, preferably from 5 to 50 nm.

By "polychromatic light source" is meant a light source having at least two emission peaks at different wavelengths in the visible wavelength range. The perceived color (by the retina) is then the result of a mixture between the different wavelengths. It can be an LED, and / or an LED display (s), with an emission spectrum having a main emission peak and another emission peak, for example fluorescence, more wide than the main peak, and generally of lower intensity. The polychromatic LED emits in particular according to a first emission (of high or low intensity) of between 400 and 500 nm and according to a second emission (of high or low intensity) in the visible range beyond 500 nm (for example, for example). LEDs formed from at least one electroluminescent crystal and photoluminescent phosphor (s)). It is particularly possible to use as sources white LEDs manufactured for example from a semiconductor crystal chip such as gallium / indium nitride (InGaN) emitting in blue, covered with a transparent resin (such as silicone or epoxy) containing mineral phosphors (for example YAG: Ce), absorbing blue and emitting in yellow. It is also possible to use polychromatic emission LEDs, for example formed from three monochromatic sources of intensities independently regulated of the "RGB" type (with three sources: red, green and blue), etc.

One or more sources may also be integrated in or coupled to or combined with one or more display-type structures (for example with "7-segment" light-emitting diodes or liquid crystal diodes), headband or display screen. electronic control with sensitive keys and digital display (if necessary by wireless communication using an interface), etc.

In addition to the source or sources, the article according to the invention may also comprise at least one waveguide intended to propagate light from one part of the article to the other (in particular by total internal reflection or by reflection metal), especially when the sources are placed under the work plan, each light source then being attached to the guide concerned and cooperating with it by emitting its light radiation within it so that the guide transmits it, the source or sources light emitting / being coupled for example by the edge or edge of the guide. This guide is advantageously clear or transparent, and may be particularly reported (assembled after being designed separately) under the underside of the plate. It can be organic and / or plastic (for example polycarbonate or polymethyl methacrylate PMMA), or mineral, and is preferably mineral; in particular, it is a glass. The article according to the invention may comprise several guides each dedicated to one or more lighting zones, or a unitary guide provided, if appropriate, with openings. The guide can be secured to the substrate by gluing and / or clipping, or by encapsulation, etc. The assembly of the guide can be done directly on the substrate or on another part of the equipment or a support on which is mounted the work plan, for example can be secured to the box on which rests the work plan. The guide makes it possible, among other things, to better conduct the light to the desired lighting zones and is particularly suitable with the substrate used according to the present invention.

In the particular case where one or more sources are placed under the work plan, where appropriate associated with at least one waveguide, the equipment may also comprise in the lighting zone, at least one means for extracting the radiation emitted by the source or sources, for example one or more scattering elements or treatments, in particular a layer added to the surface and / or any treatment or differential texturing of the surface (local or over the entire surface) of the waveguide or the extraction surface, such as laser etching, enamel printing, etching (acid ..) or mechanical ( sandblasting ...), etc. An extraction surface may optionally be provided in the thickness of the guide, following for example an internal laser engraving technology. The geometry and roughness of the edge of a waveguide can also be worked to allow local and controlled extraction of light. The extraction means (s) make it possible to extract the radiation from the guide towards the desired lighting zone. They may be combined, if necessary, with another treatment that makes it possible to target the lighting zones, for example with an occult screen printing (masking certain zones and preventing the passage of light) deposited on a part of a face of the substrate.

Where appropriate, especially in the case where one or more sources are placed under the worktop, the equipment may also include at least one filter (coupled (in operation) to at least one source (as well as to the plate). , the resulting colored zone resulting in particular from the (the action / the effect of) these three components)), so as to form a colored light zone of chosen color (the color of a source perceived through a substrate in dark ceramic glass being modified with respect to the original color of the source through the passage through the plate), positioned generally between the source and the plate, this filter can in particular be combined (or secured) to the source and / or to the plate and / or possibly to another intermediate element.

By "filter" is meant an optical filter (acting on the transmission of light), in particular colored (the action on the transmission of the wavelength being done as a function of the wavelengths), this filter being in particular an element or material, generally plane, in particular in the form of film or layer or composite, based on at least one organic or mineral material, (semi-) transparent (in the sense in particular where it is transparent to certain ) wavelength (s) of the visible and non-transparent to / blocking / affecting other (s), this filter furthermore generally having a light transmission of at least 5% and in particular at least 30 %), in particular allowing to absorb and / or reflect and / or re-transmit certain wavelengths of the visible spectrum. This filter may advantageously be an absorption filter (the action on the transmission of light being effected by absorption at certain wavelengths, the absorbed light being able to be converted into heat and / or emitted at other lengths of wavelength. wave), or can also be a reflection filter (the action on the transmission of light is by reflection at certain wavelengths). The filter can be attached (manufactured separately) and combined with at least one light source and / or the work plane, or it can be integrated or made directly on said plane and / or said source, for example in the form of a layer printed, for example by ink jet. The radiation emitted by the source passes through the corrective filter to produce the desired display through the substrate to which this set is combined. The filter may make it possible to form different colors, for example at least one colored zone of white color or of a synthetic color obtained by a mixture at several wavelengths.

The filters can be transparent colored polymers, colored glasses, the coloring being deposited or in the mass, or can be layers deposited on the sources or the substrate or another support, etc. One or more absorption filters are advantageously used, advantageously making it possible to obtain the chosen effect or color whatever the angle of incidence of the observation, formed for example by deposition (by screen printing, by inkjet or laser printing, by spray, by dipping, by roller application, etc.) of one or more inorganic or organic dyes or pigments (optionally dissolved or dispersed in a medium, in particular a silicone resin, epoxy or acrylic, or polyurethane, a UV-curing ink, or a sol-gel type mineral matrix) on the surface of the chosen substrate (glass or plastic / polymer of polyethylene terephthalate, polycarbonate, acrylate, polyetheretherketone (PEEK), etc.) type, the selected dyes or pigments advantageously resistant to heat.

It is also possible to use one or more filters acting by light reflection (this reflection being in particular controlled by interference occurring within a stack of thin layers made of different materials, a thin layer being a layer whose thickness is less than at the wavelength of light), including dichroic type filters, based on semi-reflective interferential layers (layers), etc., made for example by deposition (under vacuum) in the physical vapor phase (PVD) or chemical vapor phase (CVD) of alternating high and low refractive index layers, the substrate on which the deposition is carried out may be a glass material or a polymer.

The filter (s) are chosen as a function, if necessary, of the plate used, of the desired color, of the source, and of the effect sought (for example conservation of the color of the source for a given source or whatever that source may be. source, or obtain a target color different from the initial color of the source after transmission through the plate / filter assembly), by the combination, if necessary, of existing filters or by the production of an appropriate filter to arrive at the spectrum of desired transmission by acting on different variables (concentration of pigments, type of pigments, thickness of the filter, etc. in the case of an absorption filter, or number of layers, index of each material, thickness of the filter, in the case a dichroic filter, etc.).

The filter may be attached / deposited, if necessary, on the plate (on its underside), in particular by gluing, deposition (of a layer acting as a filter) by laser or inkjet printing, by screen printing, by spray, etc., or can be attached between the source and the plate, or mounted on the source (by deposition, gluing, encapsulation, cap, etc.). Where appropriate, the filter may be inserted between the light source and the light injection surface of a waveguide.

The source / plate combination and, if appropriate, filter makes it possible to obtain a colored or white display through the dark substrate and / or on said substrate, with luminous effects that are particularly sought after in terms of design. The article may have one or more light / display areas for functional and / or decorative use, the one or more areas may be in any area of the plate, and there may be several different light / display areas ( color, luminance level), and / or each zone may itself have different colors.

As indicated above, the equipment according to the invention also comprises at least one communication interface with at least one element of the plane (such as the light source or sources), and / or with an external element of the plane, for example for a wireless communication. This communication interface (man-machine or machine-machine in particular) can be a device allowing in particular to control or transmit commands to the light sources, from or through buttons or control buttons integrated in the work plane or remote on an outer element advantageously removable or mobile, particularly in the case of a command by wireless communication.

Preferably, the interface allows wireless communication with a unit outside the work plane (this unit can be part of the equipment according to the invention and can itself be an interface), allowing for example the activation to distance of the light sources and / or the control of different functions (data display on the working plane, etc.), the commands given by the outdoor unit being transmitted by the interface to the relevant components of the equipment. The interface may also be a control interface located at the plane (control panel) transmitting the commands by wire or possibly without wires to other components of the plane or out of the plane (for example to the remote sources of the plane in the plane). case of projection lighting).

The outdoor unit in the case of a remote control can be for example in the form of a keyboard, a tablet or a touch screen, a mobile phone, this unit can be fixed (for example fixed on a wall) or mobile (can be placed on the worktop if necessary). This embodiment has the particular advantage of avoiding fingerprints (unsightly and visible on glass materials) on the worktop. In particular for safety concerns, the wireless communication may advantageously be provided to be limited in scope (for example limited to the volume of the room in which the equipment is located) and / or provided with security to prevent inadvertent activation. by a person not present. The wireless communication is carried out in particular by electromagnetic or radio waves, if necessary using Bluetooth, WLAN, wifi, RFID chip type systems, etc.

The interface can make it possible to transmit different signals initiated by contact or even by movement to activate different components as already mentioned (for example it can convert a movement, detected by sensors by triangulation, these sensors being connected to this interface (and making part the where appropriate), by activating a function (eg lighting of areas, etc.). It may also allow the downloading and / or transmission of various data (such as web pages, wallpapers, recipes, etc.), these data being for example transmitted to light sources allowing in particular their display at the surface of the worktop.

At least one interface is generally located on or under the work plane or nearby. The equipment according to the invention can also comprise several interfaces, of the same type or different, allowing for example the activation of different elements, or the equipment can comprise several interfaces, functioning if necessary differently (of different constitution, operating at different frequencies, etc.) to control the same element with a higher level of security. The interface may be formed of sensor (s), connector (s), control element (s), any other electrical or electronic or electromagnetic component, etc.

In addition to the interface, the equipment or worktop can be provided with different cables, connectors or other elements, including electrical contributing to the transmission of orders from one part to another of the equipment.

The equipment, in particular the work surface, according to the invention may also comprise various functional and / or decorative coatings, in particular those generally used with the glass materials concerned, for example enamel, paint, diaper (s) thin (for example metallic (s), dielectric (s), etc.), etc. For example, one of the faces of the substrate may comprise one or more layers or one or more enamel patterns, for decorative purposes and / or for signaling one or more elements (displays, etc.), and / or serving as masking (To avoid, for example, the direct vision of the sources, this masking being however not necessary with the substrates selected according to the invention), and / or for other functions (as a light extractor or to homogenize the lighting, etc. .). In particular, the work surface may be provided with a functional layer giving it one or more additional properties such as anti-scratches, mechanical reinforcement, anti-traces, anti-overflow, etc. The coating may be carried out for example by processes such as screen printing, sputtering or pneumatic spraying, inkjet or enamel, etc., the coating being applicable in particular on the apparent face or on the opposite face, depending on the type of coating and the desired function. For example, in the case of an enamel decoration, it is preferentially deposited on the upper face for reasons of visibility in particular, while an opacifying layer in paint is preferably deposited on the opposite face not apparent for better protection against abrasion, etc.

As indicated above, the decorations (or at least some of them) or displays of the worktop can also be obtained with advantages by luminous display (rather than by deposition of a coating), or even by luminous projection on the plane. forming screen when it is coated with at least one opacifying layer (in particular enamel), as already mentioned above.

The present invention also relates to a method of manufacturing an equipment according to the invention, in particular the working plane of said equipment, when this working plane is formed of at least one glass-ceramic substrate with an area greater than 0.7 m ² , in which at least one ceramization cycle of a glass plate with an area greater than 0.7 m ^{2 is carried out} to obtain said substrate, and according to which the rate of passage is reduced by at least 25%, preferably by at least 50%, or the length of the ceramic arch or the residence time in said arch is increased by at least 25%, preferably by at least 50%, with respect to speed, length or time respectively. optimal or usual residence conditions for obtaining a glass-ceramic substrate having a surface area of less than 0.4 m ² .

For the record, the manufacture of the glass-ceramic plates generally takes place as follows: in a melting furnace, the glass of the composition chosen is melted to form the glass-ceramic, and then the molten glass is rolled into a standard ribbon or sheet by passing the glass melted between rolling rolls and cut the glass ribbon to the desired dimensions. Alternatively to rolling, the glass can be floated, as described for example in the patent application WO2008056080, before being optionally cut. The plates, already cut or not, are then ceramized in a manner known per se, the ceramization of baking the plates according to the thermal profile chosen to transform the glass into the polycrystalline material called "glass-ceramic" whose expansion coefficient is zero or almost -nul and which is resistant to thermal shock up to 700 ° C. The ceramization generally comprises a step of gradual raising of the temperature to the nucleation range, generally located in the vicinity of the glass transformation domain, a step of crossing in several minutes of the nucleation interval, a new progressive elevation of the temperature up to the temperature of the ceramic bearing, the maintenance of the temperature of the ceramic bearing for several minutes and a rapid cooling to room temperature. If necessary, the method also comprises a cutting operation (generally before ceramization), for example by water jet, mechanical tracing with the wheel, etc. followed by a shaping operation (grinding, beveling, ...). The method may also include a rolling or collapsing step to form particular reliefs.

In the present invention, the vitroceramic follows a ceramization cycle giving it the desired properties, in particular a dark / black / brown appearance, little transmissive and little diffusing.

Other details and advantageous features will emerge below from the description of a non-limiting embodiment of the invention with reference to the accompanying drawings in which:

- Figure 1 shows a schematic perspective view of an equipment according to the invention;

- Figure 2 shows a schematic top view of similar equipment (the utensils on the surface or the underlying elements of furniture not being represented);

- Figure 3 shows a schematic side view in which a piece of furniture (23) has been removed to reveal some components of the equipment.

In this example the equipment (1) according to the invention comprises a cabinet (2) formed of a box (4) surmounted by a work plane (5) formed of at least one monolithic substrate (6) glass-ceramic 2.7 m ² of surface, this substrate occupying the majority (here all) of the surface (measured in the upper face) of the work plane. This substrate is for example a plate of the type marketed under the reference KeraBlack + by the company Eurokera, this plate having a smooth upper face and a lower face provided with spikes, and a thickness of 8 mm, and having a brightness L ^* of 0.12, a blur of 0.6%, a light transmission T _L of 0.03%, and an opacity indicator of 99.96. This substrate is for example obtained by proceeding as in the patent application WO 2012156444 but reducing the rate of passage in the arch of ceramization by 50%.

Alternatively, this substrate may also be for example a 5.5 m ² glass-ceramic plate of the type marketed under the reference KeraVision by the company Eurokera, this plate having a smooth upper face and a smooth lower face, and a thickness of 6 mm. , and having a brightness L ^* of 1 .08, a blur of 2.17%, a light transmission T _L of 3.8%, and an opacity indicator of 99.53. This substrate is for example obtained by proceeding as in patent application WO 2012001300 but reducing the rate of passage in the arch of ceramization by 50%.

The substrate used has a black color (in the two cases mentioned above). In both cases, the glass-ceramic substrate obtained has a flatness of less than 2 mm (the flatness obtained being between 2 and 3 mm for a reduced speed of only 25%, and being more than 15 mm for an unchanged speed relative to to that used in the aforementioned application to obtain a plate of standard dimensions less than 0.4 m ² ), the desired flatness for good optical properties in particular, being less than 3 mm, preferably less than 2 mm.

The equipment may also include one or more light sources (8, 8 '), for decorative purposes for lighting effects, or intended for example to indicate locations (for example to deposit hot utensils), these sources being able to be placed in particular under the substrate and hidden by the substrate when they are at rest. These sources indicate, for example, one or more zones using for example a circle (s) of light of greater or lesser size and of color (9) delimiting each location (the colors possibly being identical or different depending on the locations ). In the present case, the sources are offset laterally with respect to the zones to be illuminated (as indicated in FIG. 3), and the light is transmitted to the selected zones via a waveguide (10). This optical guide (10) is for example in the form of a borosilicate clear glass plate 3 mm thick and the sources (8) are formed by example of a plurality of LEDs carried by a base housed in a profile, the sources being on a portion of the edge of the guide out of the lighting zones, the article further comprising means for extracting the radiation emitted by the sources, these means being in the form of enamelled or sandblasted areas 1 1 each located under each of the desired lighting zones.

The equipment furthermore comprises at least one communication interface (12) (hidden by the substrate), for example with the light sources, this interface also communicating wirelessly with an outdoor unit in the form, for example, of a touch pad ( 13) for activating different areas and functions of the plate or equipment. The outdoor unit can be advantageously movable and rest on the work plane (Figure 1) or used for remote activation (Figure 3) of different areas or functions. Alternatively or cumulatively, the interface could also include or be connected to a fixed control panel located on the surface of the substrate (2) for the activation of different zones and functions, in particular of the substrate.

Where appropriate the equipment may be associated with or also include (or alternatively with the lighting system formed by the light sources under the substrate) a lighting system (14) overhanging the work plane, this system integrating at least one light source (8 ') for illuminating the work plane or signaling zones (especially in the latter case when the upper face of the substrate (6) is coated with an opaque enamel).

The equipment also comprises other elements, including electrical cables (15) for the activation of the sources, and has drawers (16) or cupboards (17) arranged in the box supporting the worktop, for storage various articles, etc. The equipment may also include other elements, for example the work plan may include a frame, the substrate may be coated with a permanent decoration, localized or not, for example enamel, the box may be full or have different recesses (such as the recess (18), or integrate other elements (eg drawers, etc.) The worktop (5) can be used for different purposes, such as writing (as symbolized by the paper and the pen (19)), the support of objects (as symbolized by the dishes (20)), the use as a kitchen table (allowing in particular to eat or deposit hot cooking containers (21) if necessary , etc.), etc. If necessary, the box can also be replaced by support feet (for example only the walls 22 and 23, or four feet at the four corners, the equipment under the work plan in this case being preferably hidden by a localized formwork of a few centimeters thick under the substrate) like a table.

The equipment according to the invention can in particular be used with advantages to achieve a new range of multi-purpose and interactive furniture without cooking zones.

Claims

1. Furniture and / or household equipment, advantageously interactive, comprising:

at least one working plane formed of at least one substrate of monolithic glass material with an area greater than 0.7 m ² , said substrate having a luminosity L ^{* of} less than 10, a blur of less than 30%, and a light transmission T _L less than 10%,

at least one light source, in particular intended to materialize one or more zones or one or more elements or displays of the substrate, this source being in particular under the substrate and being hidden by it when this source is at rest,

at least one communication interface with at least one element of the plane such as the light source (s), and / or where appropriate with at least one external element for a wireless communication,

said equipment being furthermore devoid of heating element (s).

2. Equipment according to claim 1, characterized in that the surface of the glass material substrate is greater than 0.9 m ² , especially greater than 1 m ² , in particular at least 2 m ² , the thickness of said substrate being at least 2 mm, in particular at least 2.5 mm, in particular is of the order of 3 to 30 mm, and advantageously is less than 15 mm, in particular is of the order of 3 to 15 mm, in particular from 3 to 10 mm.

3. Equipment according to one of claims 1 or 2, characterized in that the substrate of glass material occupies at least 50%, including at least 70%, in particular at least 90% of the surface of the work surface.

4. Equipment according to one of claims 1 to 3, characterized in that the substrate is tempered glass or glass-ceramic, and preferably is glass-ceramic.

5. Equipment according to one of claims 1 to 4, characterized in that the substrate has a flatness less than 0.1% of the diagonal of the substrate, and preferably less than 3 mm, especially less than 2 mm, in particular less than 1 mm, or even of the order of zero.

6. Equipment according to one of claims 1 to 5, characterized in that the substrate is dark in appearance, especially black or brown, and preferably has a brightness L ^* less than 7, and / or lower blur at 20%, and / or a light transmission T _L less than or equal to 8%, this light transmission being advantageously non-zero, the substrate made of glass material advantageously having these characteristics intrinsically.

7. Equipment according to one of claims 1 to 6, characterized in that the substrate or the glass material has an opacity indicator of less than 100, and preferably greater than 93.

8. Equipment according to one of claims 1 to 7, characterized in that one or zones and / or elements and / or functions and / or decorations, are indicated, on activation and / or permanently, by means of one or more light sources and / or by means of a fixed decoration, for example enamel.

9. Equipment according to claim 8, characterized in that one or zones and / or elements and / or functions and / or decorations are indicated by, and / or highlighted by means of, at least one light source, on activation of said source, said source being in particular placed under the substrate and allowing a light display by transmission through the work plane.

10. Equipment according to claim 8, characterized in that the apparent face of the substrate is coated with an opacifying coating, in particular an enamel or thin layers, the coverage rate of said opacifying coating in the coated zone being at least 5%, preferably at least 20%, in particular at least 45%, or even 100%, the enamel optionally having a pigment content greater than 2%, in particular greater than 5% , preferably greater than 10%, in particular between 5 and 30%, and / or having a refractive index different from that of the substrate, and in that one or more zones and / or elements and / or functions and / or decorations are indicated by, and / or highlighted by means of, at least one light source, on activation of said source, said source being on the side of the apparent face of the substrate or on the side where the display is sought or to be seen, and allowing a luminous display by projection on this screen face.

1 1. Equipment according to one of claims 1 to 10, characterized in that the light source (s) or other component (s) are activatable by contact on the surface of the plane and / or on the interface and / or on an outdoor unit, or by movement, including the hand.

12. Equipment according to one of claims 1 to 1 1, characterized in that the equipment comprises a plurality of light sources, disposed so that the angle between each source, or between each element sending the light to the working plane) and the normal to the working plane is between 5 and 60 °, preferably between 30 and 45 ° to minimize the shadow effects projected by a person working on the work plan.

13. Equipment according to one of claims 1 to 12, characterized in that the equipment further comprises at least one waveguide.

14. Equipment according to one of claims 1 to 13, characterized in that the equipment comprises at least one optical filter so as to form a selected color colored light zone, this filter being generally placed between the source and the substrate and can be secured to the source and / or the substrate, and / or possibly to another intermediate element.

15. Equipment according to one of claims 1 to 14, characterized in that the interface allows wireless communication, in particular with a unit outside the work plane, allowing for example remote activation of light sources and / or the control of different functions, the outdoor unit being for example in the form of a keyboard, a tablet or a touch screen or a mobile phone, this unit can be fixed or mobile, wireless communication for example being limited in scope, for example limited to the volume of the room in which the equipment is located.

16. Equipment according to one of claims 1 to 1 5, characterized in that the interface makes it possible to transmit different signals initiated by contact or movement to activate different components and / or allows the downloading and / or transmission of data such as internet pages, wallpapers or cooking recipes, such data being for example transmitted to light sources allowing in particular their display on the surface of the work plan.

17. Equipment according to one of claims 1 to 1 6, characterized in that the work plane comprises one or more functional and / or decorative coatings, for example based on enamel or paint or thin layer (s). (s).

18. Equipment according to one of claims 1 to 17, characterized in that the work plane is mounted, in particular horizontally, on at least one or support elements, such as a box of a piece of furniture or one or more support legs, thus forming with said support elements a table, a piece of furniture, full or not, or a counter.

19. Work plane formed by at least one substrate of monolithic glass material with an area greater than 0.7 m ² , said substrate having a brightness L ^{* of} less than 10, a blur of less than 30%, and a light transmission T _L less than 10%, this work plan being intended to equip a piece of furniture or interactive equipment multi-use without heating element (s), in particular as defined in one of claims 1 to 18.

20. Use of a substrate, in particular of a plate, made of monolithic glass material with an area greater than 0.7 m ² , said substrate having a brightness L ^{* of} less than 10, a blur of less than 30%, and a light transmission T _L less than 10%, as interactive multipurpose worktop according to claim 19 and / or in equipment according to one of claims 1 to 18.