EP1858299B1 - Utilisation de méta-matériaux gauchers en tant qu'affichage, en particulier sur un champ de cuisson, affichage et procédé d'affichage - Google Patents

Utilisation de méta-matériaux gauchers en tant qu'affichage, en particulier sur un champ de cuisson, affichage et procédé d'affichage Download PDF

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Publication number
EP1858299B1
EP1858299B1 EP07009565A EP07009565A EP1858299B1 EP 1858299 B1 EP1858299 B1 EP 1858299B1 EP 07009565 A EP07009565 A EP 07009565A EP 07009565 A EP07009565 A EP 07009565A EP 1858299 B1 EP1858299 B1 EP 1858299B1
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EP
European Patent Office
Prior art keywords
metamaterials
indicator
display
use according
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
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EP07009565A
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German (de)
English (en)
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EP1858299A3 (fr
EP1858299A2 (fr
Inventor
Wolfgang Dr. Thimm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EGO Elektro Geratebau GmbH
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EGO Elektro Geratebau GmbH
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Publication of EP1858299A2 publication Critical patent/EP1858299A2/fr
Publication of EP1858299A3 publication Critical patent/EP1858299A3/fr
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1218—Cooking devices induction cooking plates or the like and devices to be used in combination with them with arrangements using lights for heating zone state indication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
    • F24C7/083—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination on tops, hot plates

Definitions

  • the invention relates to the use of left-handed metamaterials as a display, for example on an electrical appliance such as a hob or the like, and a corresponding display and a display method.
  • LEDs are arranged around an induction coil on a hob and are electrically supplied by coils in which a voltage is induced during operation of the induction coil.
  • an automatic operation indicator for the induction heating coil can be realized.
  • the invention has for its object to provide an aforementioned use, a display and a display method, which disadvantages of the prior art can be avoided and in particular a display can be realized using materials that have their optical properties under possibly targeted action change.
  • the left-handed metamaterials will be used as display or in display means. These are in particular a function or information display, for example an electrical appliance such as an electric cooking appliance, so about hobs or ovens.
  • the left-handed metamaterials are present in the form of a layer or at least one thin plate, which are arranged near or directly to a housing wall or cover of the display or the electrical device.
  • switchable induction means or so-called magnetizing means are arranged in the vicinity of these left-handed metamaterials. In particular, this is an induction coil, which can be switched on and off particularly easily.
  • metamaterials for example, copper and gold are each suitable with structures in the range of less than 10 .mu.m.
  • Ferroelectrics such as Ba x Sr 1-x TiO 3 can also be used. More about this can be found in the US 6963259 B2 or the CA 2430795 A1 , When choosing materials, however, it should be noted that there are no materials that have such self-heating due to magnetic induction that they or the metamaterials would be damaged or even destroyed. This applies, for example, to nickel.
  • Such metamaterials make it possible, when applying or changing a magnetic field in whose field of action they are to change the optical properties so that they change, for example, from the opaque state into a transparent state.
  • the metamaterial is influenced in such a way that its optical properties change.
  • This can either affect their transmission properties, ie their transmission.
  • it may relate to their reflection properties, ie reflection. It can also affect color properties.
  • this "optical switching" can thus be visible to an operator or made visible in order to realize the display function. This will be discussed in detail below. Likewise, it is also discussed how exactly this change of the magnetic field can be generated.
  • the metamaterials are arranged on the display so that they are directly visible.
  • the change of the optical properties or the changed visual appearance can be recognized directly.
  • One possibility here is an arrangement under a cover or panel, which is substantially transparent, so for example, consists of transparent glass or plastic.
  • the metamaterials are arranged on a cover, housing wall or panel. This one is independent of the optical properties of the cover itself, since the metamaterials or their change in the visual appearance are visible anyway. So it can also be used an opaque cover.
  • the metamaterials can be arranged in front of light sources or in front of a light display and cover them, for example.
  • the metamaterials are considered as a kind of aperture, which usually covers, for example, the bulbs or ensures that they are not visible.
  • the metamaterial becomes transparent and so becomes the light source visible, noticeable. In this way, a display function for an operator can be realized.
  • the metamaterials can be arranged behind light sources or a display. Then mainly reflective properties, which can be changed depending on a magnetic field, are used. It may be possible, for example, that a display for an operator is only then visible when the metamaterials or a layer consisting of them becomes reflective by applying a magnetic field.
  • the metamaterials in the manner of a layer or the like. be arranged under a substantially transparent cover. Although they are not necessarily visible, when they change their optical properties towards reflecting ambient light can reflect back through the cover so that it can be clearly perceived by an operator as an indicator.
  • the metamaterials can be designed in the form of symbols or labels that they should display as an indication.
  • induction means or magnetizing means can advantageously be used coils.
  • a particularly advantageous possibility is an induction coil under a cover. This is a very advantageous possibility, for example, as induction heating coil in an induction hob.
  • the metamaterials are then in the effective range of the induction heating coil when an object to be heated, in particular a cookware, is placed on the cover.
  • the metamaterials are particularly advantageously outside the induction heating coil such that they are expected to be outside the object to be heated, so that they are still visible. simultaneously However, they should not be too far away from the induction heating coil, so that the magnetic field to be reached is still strong enough for the desired effect or change in the optical properties.
  • metamaterials are their increased temperature resistance compared to LED displays. Thus, they may be arranged closer to a heater, such as a radiant heater in a hob.
  • the metamaterials are arranged in an annular manner around the induction heating coil or along an annular contour.
  • they have a small distance from the induction heating coil. This small distance should not exceed a few centimeters, so that, as previously described, the magnetic field is still strong enough. You can form a substantially closed ring. It is advantageously possible here, in particular when used in an induction hob, when the metamaterials are applied as a ring-like layer on top or on the underside of the hob surface. So they are clearly visible according to the above-described embodiments.
  • induction means or magnetizing means fixedly provided on the display provision can be made for example when applying a magnetic operating element, in particular according to the DE 296 05 163 U1 , which generates the magnetic field for altering the metamaterials. If such an operating element attached to a designated position for subsequent operation of the electrical appliance so that its operational readiness can be displayed, for example, by changing display due to the changing optical properties of the metamaterials.
  • FIG. 1 an induction hob 11 is shown. It has according to a conventional induction hob on a cooktop plate 13, below which an induction heating coil 15 is arranged. Their size defines a hob 16, on which a cookware 17 is placed as a saucepan. In this case, the diameter of induction heating coil 15, Hotplate 16 and cookware 17 approximately match, or should agree for the best possible heating of the cookware 17 and its contents.
  • a display 18a or 18b according to the invention is provided. Although these are shown together, only one is available in practice.
  • the display 18a includes a layer 19 of left-handed metamaterial as previously described. This lower layer 19 is disposed on the underside of the cooking field plate 13, slightly outside or adjacent to the surface corresponding to the extent of the induction heating coil 15 and the hotplate 16, respectively. Although it may continue to extend to the center of the induction heating coil 15 back. But then she is like out Fig. 1 can be seen, with attached cookware 17, ie when operating the induction hob 11, covered by the cookware 17 and no longer visible, so would bring little benefit.
  • the display 18b accordingly has an upper layer 20, which also consists of left-handed metamaterial or has this. Also, it is, as shown, usefully arranged outside the hob 16 or adjacent to this. In addition to the aforementioned reasons plays here also a role that depending on the mechanical resistance of the layer, the cookware 17 is then placed less frequently on the layer 20 and thus could neither damage nor scratch or remove it.
  • FIG Fig. 1 shown greatly exaggerated thick. This is certainly not necessary in practice, layer thicknesses of 1 mm and less are considered sufficient. This applies in particular to the upper layer 20, since an increasing thickness would be disturbing here.
  • the shape or configuration of the layers 19 and 20 is the Fig. 2 to 4 explained in more detail below.
  • the layers of the left-handed metamaterials thus also the layers 19 and 20, can be formed in any desired form, that is to say both as simple surfaces and as symbols, characters or the like.
  • Fig. 1 Although not the exact course of the magnetic field during operation of the induction heating coil 15 is shown. With attached cookware 17, that is, when the induction heating coil 15 is actually in operation for a long time, most of the magnetic field is concentrated in the bottom of the cookware. Nevertheless, even at the edge, that is to say where the layers 19 and 20 are arranged, a sufficiently strong magnetic field or stray field is produced in order to bring about the aforementioned change in the optical properties of the left-handed metamaterials.
  • Fig. 2 is another induction hob 111 shown in a modified form.
  • a cookware 117 is placed on a hotplate 116.
  • two displays 118a and 118b are shown, similar to FIG Fig. 1 , However, here are further arranged below each other display means.
  • Under the lower layer 119 a seven-segment display 123 of the known type is arranged.
  • Under the upper right layer 120 a simple light source 122 is arranged, for example a single LED, a glow lamp or the like.
  • an induction hob 211 which is in principle the same as the display 218, has a lower layer 219 with the left-handed metamaterial. It is tilted so that it is illuminated by a light source 222 arranged to the left, which is shielded at the top by the shield 224 and thus is not visible in the active state, and the beam path the light rays are deflected upward through the hob plate 213.
  • the function of the indicators 18 in the versions of Fig. 1 to 3 is the following. at Fig. 1
  • the optical behavior of the layers 19 and 20 changes. If they were transparent or transparent, for example, without a magnetic field, they can now be seen as opaque or as a layer or as a symbol. While this is self-evident in the upper layer 20, since it is in the direct field of view, for the detection of a lower layer 19, ie below the hob plate, a substantially transparent cooktop plate is necessary. This can, in particular in an induction hob, consist of hard glass and has the necessary physical properties. Thus, the change in state of the layer 19 can be recognized by the cooktop plate 13 and be understood as a display function.
  • the layers 119 and 120 illuminate illuminated displays. So while in Fig. 1 To illustrate the operation of the induction heating coil, the layers have changed their optical properties from transparent to intransparent, this is done in Fig. 2 the other way around.
  • the otherwise non-transparent layers 119 and 120 become transparent or translucent when the induction heating coil 115 is operated with the magnetic field generated.
  • the illuminants 122 or the seven-segment display 123 arranged underneath are visible to an operator as an indication.
  • the layer 120 it can be provided that either the formation of the layer 120 or another masking not only represents a light spot produced by the luminous means 122, but also a specific symbol.
  • the layer 219 is not reflective. If it is influenced by the magnetic field of the induction heating coil 215 during its operation, it changes its optical properties and becomes reflective. As a result, the light of the luminous means 222 is reflected upward in accordance with the illustrated beam path and can be recognized by an operator as an operating indicator of the cooking position 216.
  • Fig. 4 is in plan view of the induction hob 11 according to Fig. 1 illustrated how the upper layer 20 is formed so to speak as a closed ring around the hob 16 and a provided cookware 17 around.
  • the layer 20 changes its optical properties, becomes, for example, opaque or changes in color or reflectivity. This is, in particular because the layer 20 is applied to the top of the hob plate 13, visible to an operator as a display 18.
  • the left lower layer 19 may also be used as shown in FIG Fig. 1 be formed in such a ring-like shape as a display.
  • FIG. 5 Another embodiment is in Fig. 5 shown as an operating device 310.
  • This operating device is based on the principle of the aforementioned DE 296 05 163 U1 built up.
  • a cover or housing wall 313 On a cover or housing wall 313, either lower layers 319 or upper layers 320 are provided with said left-handed metamaterials, again in any shape or planar configuration.
  • a lower magnet 326 Below the cover 313 is a lower magnet 326 together with lower magnetic star 327th
  • the stationary magnet 326 Opposite the stationary magnet 326 is defined a location on which a detachable rotary knob 329 can be placed to operate or input commands.
  • This rotary knob 329 includes a central magnet 330 together with the associated upper magnetic star 331. Will be in accordance with the above DE 296 05 163 U1 the rotary knob 329 positioned above the lower magnet 326 for a subsequent rotary operation, the magnetic field generated by it triggers said changes in the layers 319 or 320.
  • their optical properties in the context of all the aforementioned possibilities thus also form a display 318a and 318b.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
  • General Induction Heating (AREA)

Claims (15)

  1. Utilisation de méta-matériaux gauchers en tant qu'afficheur (18, 118, 218, 318) ou moyens d'affichage, en particulier en tant qu'afficheur de fonctions et d'informations sur un appareil électroménager ou une plaque de cuisson (11, 111, 211), caractérisée en ce que les méta-matériaux sont disposés sous forme d'une couche ou au moins d'une fine plaque à proximité ou immédiatement contre une paroi de boîtier ou un élément de recouvrement de l'afficheur (18, 118, 218, 318), sachant que des moyens d'induction ou des moyens de magnétisation commutables, en particulier une bobine d'induction, sont disposés à proximité des méta-matériaux.
  2. Utilisation selon la revendication 1, caractérisée en ce que les méta-matériaux sont disposés de manière à être directement vus sur l'afficheur (18, 118, 318), en particulier sous un élément de recouvrement (13, 113, 313) essentiellement transparent.
  3. Utilisation selon la revendication 1, caractérisée en ce que les méta-matériaux sont disposés de manière à être directement vus sur l'afficheur (18, 118, 318), en particulier sur un élément de recouvrement (13, 113, 313).
  4. Utilisation selon l'une des revendications précédentes, caractérisée en ce que les méta-matériaux sont disposés devant des éléments lumineux (122, 222) ou un écran lumineux (123) et en particulier les recouvrent.
  5. Utilisation selon l'une des revendications 1 à 3, caractérisée en ce que les méta-matériaux sont disposés derrière des éléments lumineux ou un écran lumineux, en particulier en tant que moyens de réflexion.
  6. Utilisation selon la revendication 1 ou 2, caractérisée en ce que les méta-matériaux (19) sont disposés sous un élément de recouvrement (13) essentiellement transparent, en tant que moyen de réflexion pour une lumière ambiante repassant à travers l'élément de recouvrement.
  7. Utilisation selon l'une des revendications précédentes, caractérisée en ce que les moyens d'induction sont une bobine de chauffage par induction (15, 115, 215) sous un élément de recouvrement (13, 113, 213), dont la zone d'action avec l'objet (17, 117, 217) à chauffer placé sur l'élément de recouvrement comprend les méta-matériaux (19, 20, 119, 120, 219, 220).
  8. Utilisation selon la revendication 7, caractérisée en ce que les méta-matériaux sont disposés de manière annulaire autour de la bobine de chauffage par induction (15, 115, 215, 315), de préférence à une distance de quelques cm au maximum, et forment en particulier un anneau essentiellement fermé.
  9. Utilisation selon l'une des revendications 1 à 6, caractérisée par des moyens d'induction supplémentaires (330, 331) prévus exclusivement pour influencer les méta-matériaux.
  10. Utilisation selon l'une des revendications précédentes, caractérisée en ce que seuls des matériaux présentant une résistance thermique supérieure à 200 °C, de préférence supérieure à 300°C, en particulier des métaux et/ou le cas échéant des céramiques dopées conductrices, sont utilisés pour fabriquer des méta-matériaux gauchers.
  11. Utilisation selon l'une des revendications précédentes, caractérisée en ce que les propriétés des méta-matériaux gauchers changent dans la zone visible ou que le champ magnétique des moyens de magnétisation est choisi en conséquence.
  12. Afficheur, en particulier afficheur de fonctions ou d'informations (18, 118, 218, 318) sur un appareil électroménager ou une plaque de cuisson (11, 111, 211), caractérisé en ce qu'il présente des méta-matériaux gauchers qui sont disposés sous forme d'une couche (19, 20, 119, 120, 219, 220, 319, 320) ou au moins d'une plaque de fine épaisseur, à proximité ou directement sur une paroi de boîtier ou un élément de recouvrement (13, 113, 213, 313) de l'afficheur, sachant que des moyens d'induction commutables ou des moyens de magnétisation modifiables (330, 331), en particulier une bobine d'induction (15, 115, 215), sont disposés à proximité des méta-matériaux (19, 20, 119, 120, 219, 220, 319, 320).
  13. Afficheur selon la revendication 12, caractérisé en ce qu'il présente une des caractéristiques de l'une des revendications 2 à 11.
  14. Procédé d'affichage pour un appareil électroménager (11, 111, 211), caractérisé en ce que les méta-matériaux gauchers (19, 20, 119, 120, 219, 220, 319, 320) sont modifiés par la mise en marche ou l'arrêt ou par la modification d'un champ magnétique (15, 115, 215, 330, 331) en tant qu'influence sur leurs propriétés optiques, de telle façon qu'un utilisateur peut détecter la modification des propriétés optiques sous forme d'un afficheur (18, 118, 218, 318).
  15. Procédé selon la revendication 14, caractérisé en ce que l'influence est exercée par l'approche d'un aimant (330, 331) par un utilisateur vers les méta-matériaux (319, 320), en particulier en mettant un objet pourvu de l'aimant, de préférence un élément de commande mobile (329), dans une position prévue à cet effet dans l'appareil électroménager.
EP07009565A 2006-05-18 2007-05-12 Utilisation de méta-matériaux gauchers en tant qu'affichage, en particulier sur un champ de cuisson, affichage et procédé d'affichage Not-in-force EP1858299B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006024097A DE102006024097A1 (de) 2006-05-18 2006-05-18 Verwendung von linkshändigen Metamaterialien als Anzeige, insbesondere an einem Kochfeld, und Anzeige sowie Anzeigeverfahren

Publications (3)

Publication Number Publication Date
EP1858299A2 EP1858299A2 (fr) 2007-11-21
EP1858299A3 EP1858299A3 (fr) 2008-05-28
EP1858299B1 true EP1858299B1 (fr) 2009-08-26

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EP07009565A Not-in-force EP1858299B1 (fr) 2006-05-18 2007-05-12 Utilisation de méta-matériaux gauchers en tant qu'affichage, en particulier sur un champ de cuisson, affichage et procédé d'affichage

Country Status (5)

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US (1) US7814691B2 (fr)
EP (1) EP1858299B1 (fr)
AT (1) ATE441309T1 (fr)
DE (2) DE102006024097A1 (fr)
ES (1) ES2331664T3 (fr)

Cited By (1)

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EP2642821A1 (fr) 2012-03-21 2013-09-25 BSH Bosch und Siemens Hausgeräte GmbH Procédé de fonctionnement d'un champ de cuisson à induction et champ de cuisson à induction

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CN102890203B (zh) * 2011-04-30 2015-06-03 深圳光启高等理工研究院 一种人工电磁材料单元的试验点选取方法及装置
CN102768313B (zh) * 2011-04-30 2015-07-01 深圳光启高等理工研究院 一种人工电磁材料单元的试验点选取方法及装置
DE102011085112A1 (de) * 2011-10-24 2013-04-25 E.G.O. Elektro-Gerätebau GmbH Kochvorrichtung mit optischer Temperaturanzeige
CN103136401B (zh) * 2011-12-02 2016-08-17 深圳光启高等理工研究院 一种人造微结构的试验设计表获取方法及装置
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US10534189B2 (en) * 2012-11-27 2020-01-14 The Board Of Trustees Of The Leland Stanford Junior University Universal linear components
DE102016212648A1 (de) * 2016-07-12 2018-01-18 E.G.O. Elektro-Gerätebau GmbH Verwendung von elektromagnetophoretischem Material als Anzeige an einem Elektrokochgerät, Anzeige sowie Anzeigeverfahren
DE102019208064B3 (de) * 2019-06-03 2020-08-13 E.G.O. Elektro-Gerätebau GmbH Bedieneinrichtung für ein Elektrogerät und Verfahren zur Bedienung eines Elektrogeräts
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Publication number Priority date Publication date Assignee Title
EP2642821A1 (fr) 2012-03-21 2013-09-25 BSH Bosch und Siemens Hausgeräte GmbH Procédé de fonctionnement d'un champ de cuisson à induction et champ de cuisson à induction
DE102012204546A1 (de) 2012-03-21 2013-09-26 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben eines Induktionskochfelds und Induktionskochfeld

Also Published As

Publication number Publication date
ATE441309T1 (de) 2009-09-15
EP1858299A3 (fr) 2008-05-28
US20070267406A1 (en) 2007-11-22
US7814691B2 (en) 2010-10-19
DE102006024097A1 (de) 2007-11-22
ES2331664T3 (es) 2010-01-12
DE502007001375D1 (de) 2009-10-08
EP1858299A2 (fr) 2007-11-21

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