USRE48575E1 - Display device, in particular for cooktops - Google Patents

Display device, in particular for cooktops Download PDF

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USRE48575E1
USRE48575E1 US16/169,679 US201116169679A USRE48575E US RE48575 E1 USRE48575 E1 US RE48575E1 US 201116169679 A US201116169679 A US 201116169679A US RE48575 E USRE48575 E US RE48575E
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glass ceramic
display device
chromaticity coordinate
lamp
white
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Evelin Weiss
Gerold Ohl
Thomas Zenker
Martin Taplan
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Schott AG
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Schott AG
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    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • 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
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • 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
    • F24C15/00—Details
    • F24C15/10—Tops, e.g. hot plates; Rings
    • F24C15/102—Tops, e.g. hot plates; Rings electrically heated
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/02—Viewing or reading apparatus
    • G02B27/022—Viewing apparatus
    • G02B27/024—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies
    • G02B27/026—Viewing apparatus comprising a light source, e.g. for viewing photographic slides, X-ray transparancies and a display device, e.g. CRT, LCD, for adding markings or signs or to enhance the contrast of the viewed object
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • G02B5/22—Absorbing filters
    • G02B5/226—Glass filters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F23/00—Advertising on or in specific articles, e.g. ashtrays, letter-boxes
    • G09F23/0058—Advertising on or in specific articles, e.g. ashtrays, letter-boxes on electrical household appliances, e.g. on a dishwasher, a washing machine or a refrigerator
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • 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
    • H05B3/00—Ohmic-resistance heating
    • H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
    • H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
    • H05B3/746—Protection, e.g. overheat cutoff, hot plate indicator
    • 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
    • H05B33/00—Electroluminescent light sources
    • 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

Definitions

  • cooktops of modern glass ceramic cooking appliances are equipped with signal lamps or 7-segment displays.
  • the cooktop itself is made of a transparent pigmented glass ceramic panel (substrate), which appears black when viewed from above.
  • the signal lamps provide the user with information about the on state of the cooktop and/or individual cooking zones, the regulator position and also whether the cooking zone is still hot after being turned off. LED lamps are usually used as the lamp.
  • the object of the present invention is to provide a display device of the type described in the introduction, with which any predeterminable color impressions for the user on the front side of the glass ceramic can be implemented by signal lamps or display units in a simple, inexpensive and robust embodiment.
  • This object is achieved in a surprisingly simple way by arranging a compensation filter which corresponds to the desired color impression in the form of a color film or the like between the glass ceramic cooktop and the lamp, such that the shift in the chromaticity coordinate of the lamp due to the filter properties of the glass ceramic is corrected by the combination of the glass ceramic with such a compensation filter to yield the desired chromaticity coordinate.
  • Table 1 shows the corner coordinates of fields in the CIE Norm Valent System CIE xyY, as shown in FIG. 3 ;
  • Table 2 shows the corner coordinates of additional fields in the CIE Norm Valent System
  • FIG. 1 shows typical transmission spectra of various glass ceramics for cooktops, as shown in FIG. 2 ;
  • FIG. 2 shows a diagram of the chromaticity coordinates of the standard illumination E through various glass ceramics in the CIE Norm Valent System
  • FIG. 3 shows a diagram of the chromaticity coordinates of standard illumination E through a certain glass ceramic D with and without a compensation filter in the CIE Norm Valent System for white compensation;
  • FIG. 4 shows a diagram of chromaticity coordinates of an LED-RGB lamp (RGB gamut) through a certain type D glass ceramic with and without a compensation filter in the CIE Norm Valent System;
  • FIG. 5 shows a diagram of transmission curves of compensation filters F 1 through F 6 , optimized for compensation of the standard light source E and the type D glass ceramic;
  • FIG. 6 shows the y tristimulus and the Y values of filters F 1 through F 6 according to FIG. 6 ;
  • FIG. 7 shows the chromaticity coordinates of a blue LED and of a white LED with a blue filter, as observed directly and as observed through a glass ceramic of the Ceran Hightrans® eco type,
  • FIG. 8 shows brightness spectra of the blue LED and of the white LED according to FIG. 7 , as seen through Ceran Hightrans® eco, and
  • FIG. 9 shows a display device, in particular for cooktops having a glass ceramic body 10 , in particular a glass ceramic panel, forming a glass ceramic front side 12 and a glass ceramic back side 14 , and having a lamp 16 arranged in the area of the glass ceramic back side, characterized in that an optical compensation filter 18 is arranged between the glass ceramic cooktop 10 and the lamp 16 .
  • the intensity distribution i LE ( ⁇ ) of the lighting element is shifted through the total transmission spectra ⁇ ges ( ⁇ ) to the intensity distribution i A ( ⁇ ) of the display (eq. 2), as perceived by an observer on the display side (eq. 2).
  • ⁇ ges ( ⁇ ) ⁇ KF ( ⁇ ) ⁇ A ( ⁇ ) eq. 1
  • i A ( ⁇ ) ⁇ ges ( ⁇ ) ⁇ i LE ( ⁇ ) eq. 2
  • the associated shift in the chromaticity coordinate can be represented in the CIE Norm Valent System CIExyY (CIE—Commision internationale de l'éclaireage [International Commission on Illumination]). (For the following description and the examples, the 1931 CIExyY version with a 2° observer will be used in the present patent specification.)
  • the human eye is not a spectrally continuous light sensor but instead is composed of color receptors for limited red, green and blue spectral regions. Accordingly, the sensory perception of the L, M and K cones is similar with sensitivities in the red, green and blue spectra of light.
  • tristimulus functions x , y , z and their integrals X, Y, Z have been defined in the CIE formalism; these can represent the entire color space that can be perceived by our eyes as a triplet of artificial primary colors through their combination.
  • the x and z functions only correspond approximately to the L and K cone sensitivities.
  • the y function is constructed to simulate the brightness perception during the day and corresponds almost to the M cone sensitivity.
  • the perceived chromaticity coordinate is clearly described by the standardized values x and y
  • Y is a measure of brightness.
  • the CIExyY formalism describes primary light sources, optionally shining through absorbent media, whose light spectrum striking the eye is transformed into the standardized X, Y, Z CIE coordinates which then describe the chromaticity coordinate and the brightness of the primary light source,
  • the prerequisite for reaching a desired display chromaticity coordinate in the red to blue spectral range for an observer by means of a compensation filter and by means of a preferably standard commercial and inexpensive display lighting element is minimal transmission values of the substrate in the spectral range of all three L, M, K cones, for example, all three x , y , z CIE primary spectra.
  • FIG. 1 shows typical transmission spectra represented by different types (classes) of glass ceramic.
  • the composition of these glass ceramics is herewith made part of the disclosure content of the present specification through this reference. This also includes those with pigmentation by Ti 3+ by means of reductive reformation (for example, ZnS reformation), i.e., type E.
  • Creating sufficiently light color impressions in the blue to red spectral range through the glass ceramic on the display side, formed by the glass ceramic front side, using conventional commercial lamps (for example, LEDs) requires glass ceramics having an average transmission of >0.2%, preferably >0.4%, having a spectral range of 420-500 nm, 500-620 nm and 550-640 nm. As shown in FIG. 1 , this condition is met by the more recent glass ceramic classes D and E, and, with some restriction, also class C. Class A glass ceramic, which was previously very popular, does not meet this condition.
  • this glass ceramic With this glass ceramic, shifts in the chromaticity coordinate over the entire visible spectral range such as those accomplished according to the present invention are impossible with conventional lamps and filters, and in particular there is also no white compensation.
  • the spectral transmission must not be too high to prevent insight into the internal structure of the cooktop fields and to represent an aesthetically preferred nontransparent cooktop surface that is uniform in color and to do so without any additional aids such as opaque coatings on the bottom side.
  • this maximum transmission of the glass ceramic body is defined as being ⁇ 40%, preferably ⁇ 25% at 400 nm to 700 nm, and in addition is between 450 and 600 nm with an average of ⁇ 4%.
  • chromaticity coordinates of the normal illumination through glass ceramics according to the present invention should lie within a limit curve G 1 , preferably a limit curve G 2 .
  • Table 2 shows the corner coordinates with the limit curves G 1 and G 2 .
  • This linear relationship is also known from color diagrams of image displays, such as CRT or LCD monitors, for example, in which possible perceptible chromaticity coordinates in the CIExyY diagram lie in a triangle between the chromaticity coordinates of the three primary colors of the display device, which is usually an RGB color space or in a color polygon with more than three primary colors, where the chromaticity coordinate is calculated from the linear combination of three or more primary intensities according to (eq. 6).
  • a substrate for example, a glass ceramic
  • a compensation filter the relationship is no longer linear, as illustrated by eq. 9 in comparison with eq. 5.
  • the transmission spectra of the glass ceramic ⁇ GK ( ⁇ ) and of the compensation filter ⁇ KF ( ⁇ ) may be used in eq. 9 for ⁇ 1 ( ⁇ ) and ⁇ 2 ( ⁇ ) from eq. 1, for example.
  • a 1 ⁇ 2 1 N ⁇ ⁇ a _ ⁇ ( ⁇ ) ⁇ ⁇ 1 ⁇ ( ⁇ ) ⁇ ⁇ 2 ⁇ ( ⁇ ) ⁇ i ⁇ ( ⁇ ) ⁇ ⁇ ... ⁇ ⁇ d ⁇ ⁇ ⁇ Eq . ⁇ 9
  • FIG. 3 shows the chromaticity coordinates of normal light individually through a glass ceramic of type D and individually through different compensation filters F 1 -F 5 , each of which makes the standard light appear at the same overall chromaticity coordinate when arranged in combination with the glass ceramic one after the other.
  • the color filters are designed so that the overall chromaticity coordinate for the observer is at the achromatic point E (gray point or white point E).
  • a further application according to the invention is to shift the chromaticity coordinate of the lamp on the display side of the substrate to a desired chromaticity coordinate, which is different from the original chromaticity coordinate of the lamp.
  • the combined shifts in the chromaticity coordinate due to the substrate and the filter do not compensate one another here as intended. It is thus possible to generate a chromaticity coordinate that cannot be represented by the available fixed wavelengths of commercial LEDs, for example, a chromaticity coordinate that is located between a yellow LED and an orange LED.
  • lighting elements can be constructed uniformly and thus with a cost advantage using a variety of lamps that are not monochromatic but instead are colored lamps which emit over a broad spectral range (for example, white LEDs, fluorescent tubes).
  • different chromaticity coordinates for different product lines or the same chromaticity coordinates of one product line may be created in combination with substrates of different colors.
  • Chromaticity coordinate shifts and compensations can be used in particular for lamps of a broad band spectrally, such as white LEDs, fluorescent tubes or mixed colors of combined single-color LEDs, for example, RGB LEDs.
  • Compensating the chromaticity coordinate of a lamp toward white does not mean hitting precisely the achromatic point E. Instead the eye tolerates a wide chromaticity coordinate range as a white impression. This also depends on the chromaticity coordinates of the surrounding surfaces such as a reddish black cooktop surface, among other things.
  • the chromaticity coordinate of the standard light source E is still perceived as white through a filter F 6 and the type D glass ceramic (see FIG. 3 ) in the environment of the cooktop, although it is already perceived as definitely reddish in a direct comparison with the chromaticity coordinate E.
  • the goal according to the invention for white compensation of a lamp of any color is to achieve a chromaticity coordinate which is within the limits of the white range W 1 , preferably the white range W 2 .
  • the white range W 2 surrounds the white fields 1 A, . . . , 1 D, . . . , 8 D, which are defined in ANSI (ANSI binning) and are typically used by LED manufacturers to characterize the chromaticity coordinates of their white LEDs.
  • This range corresponds to color temperatures of 2580K to 7040K (CCT, color correlated temperature), in accordance with the white impression from cold white to warm white.
  • CCT color correlated temperature
  • the chromaticity coordinate compensation is not limited to the exemplary filters F 1 -F 5 according to FIG. 5 or the standard light source E.
  • commercially available and inexpensive lamps for example, white LEDs are preferably used.
  • Lamps of other colors that are not monochromatic, for example, fluorescent tubes or also for example, a combination of red, green and blue LEDs (RGB lamps) which are set at a fixed chromaticity coordinate as background lighting of LCD displays, for example, or which control a color display on a screen may also be used for compensation by means of suitably designed compensation filters on the display side of the cook field to the original chromaticity coordinate of the lamps or specifically to generate a white color impression or any other color impression.
  • RGB lamps red, green and blue LEDs
  • FIG. 4 shows one example of a correction of an RGB lamp.
  • An RGB lamp spans a triangular color space (gamut) between the LED CIExyY chromaticity coordinates which can be represented in the CIExyY color space.
  • this gamut is shifted toward the red but then the gamut is shifted back by the additional filter F 5 to almost coincide with the original gamut between the LEDs (without glass ceramic and compensation filter).
  • the white point that is set for the RGB lamp standard light D 65 here, for example
  • This correction of the white point is not exact here because the filter F 5 has been optimized for a standard light E, and nonlinearities with the spectra of the LEDs also play a role (cf. eq. 9).
  • filters F 1 -F 6 discussed here for chromaticity coordinate compensation of the standard light source E beneath a type D glass ceramic will transmit almost uniformly beneath a green wavelength (high-pass frequency filter), for example, filters F 4 -F 6 in FIG. 5 are advantageous in comparison with those in the brightness impression which have a high transmission only in the limited blue and green spectral ranges in a targeted manner, for example, filters F 1 -F 3 in FIG. 5 .
  • compensation filters with Y>10 based on standard light E
  • preferably Y>40 are advantageous for white point compensation under type D glass ceramics of white lamps.
  • FIG. 6 shows the integrative Y values of the filters F 1 -F 6 under the green tristimulus function.
  • This rule i.e., a high transmission in the green range, applies in general for combinations of any lamps and filters.
  • the compensation filter F 1 here is a special solution in which its transmission T KF and the transmission T GK of the pigmented glass ceramic cooktop are compensated to a constant value T E which is not dependent on the wavelength (eq. 10).
  • the intensity spectrum I LE ( ⁇ ) of the lamp is then weakened by a constant value T E to the intensity spectrum I A which appears on the display side (eq. 11).
  • the standard light source E achieves a brightness value of only Y ⁇ 1 through the filter F 1 .
  • Color filter films must be transparent enough for this use as compensation filters and must be thermally stable.
  • the compensation filter F 6 is an example of a color filter that is available commercially.
  • This film CT113 no. 11383 from the company ASLAN has very good results in this regard and has thermal stability up to 80° C. Films from the company Lee or Q-Max have an increased thermal stability up to 185° C. and are therefore preferred for use here.
  • chromaticity coordinate compensation is not limited to a white chromaticity coordinate. Any desired chromaticity coordinate may be adjusted with a corresponding compensation filter, for example, brand-specific colors for displays or company logos or different chromaticity coordinates for user-friendly differentiation of warnings, instructions or user aids or different chromaticity coordinates for different power levels on cooktops. This may be used in a variety of examples which serve to facilitate user guidance, status displays or various ambients of decorative lighting.
  • the resulting chromaticity coordinate of the CERAN HIGHTRANS® eco sample is almost on an imaginary line 470 nm LED—neutral point (gray square symbol—standard light E).
  • the V( ⁇ ) curve describes the brightness perception of the human eye.
  • the brightness spectra of the blue 470 nm LED mentioned above and the white LED display with blue compensation film (EURO filter no. 132), both observed through CERAN HIGHTRANS® eco, are shown as an example.
  • the area under the curves describes the perceived brightness.
  • the spectrum of the white display with the blue filter filter that filters the blue light components out of the spectrum of visible light
  • This application according to the invention is not limited to the blue spectral range.
  • masking of films is also conceivable.
  • This masking also allows a sharp delineation of the signal field and shielding of stray light as well as a display of characters, symbols or fonts, which are visible for the user when the lighting is on and cannot be seen by the user when the lighting is off. Even the position of these marks/logos cannot be discerned when the lighting is off, so the fine, single-color appearance of the glass ceramic surface is retained for the user.
  • This effect is known as the “deadfront effect” and is often desired by designers because it significantly enhances the cooking appliance in its overall aesthetics. Since the masking is done directly in the film (for example, through a second suitably printed black film), this system is much more flexible to use than masking printed directly on the back of the glass ceramic cooktop, for example.
  • the system is of course also suitable for any other light source and form of display; for example, halogen lamps, glow sticks, fiber optics or fluorescent tubes may also be used as the light source.
  • halogen lamps, glow sticks, fiber optics or fluorescent tubes may also be used as the light source.
  • bar displays or illuminated labels for identifying cooking zones or for marking or illumination of larger cooking areas or borders are also conceivable.
  • chromaticity coordinate compensation or shifts according to the invention may also be used for background lighting of alphanumeric or graphic displays, for example, LCD displays.
  • this system may also be used in the panel area of baking ovens or Domino cooking surfaces, including grill plates.
  • fireplace claddings made of glass ceramic are also known. With these fireplace claddings, illumination with the proposed system to improve user convenience is also possible.
  • the cooktop may be designed to be flat or curved or to have a complex shape. Gas burners, induction coils or radiant heating elements and/or halogen heating elements are conceivable as the heating source for the cooking areas.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Ceramic Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Computer Hardware Design (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Induction Heating Cooking Devices (AREA)
  • Optical Filters (AREA)
  • Surface Treatment Of Glass (AREA)
  • Led Device Packages (AREA)
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US16/169,679 2010-12-08 2011-12-02 Display device, in particular for cooktops Active 2033-08-19 USRE48575E1 (en)

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DE102010061122 2010-12-08
DE102010061122.0 2010-12-08
DE102010050873.2 2011-06-06
DE102011050873A DE102011050873A1 (de) 2010-12-08 2011-06-06 Anzeigevorrichtung, insbesondere für Kochflächen
US16/169,679 USRE48575E1 (en) 2010-12-08 2011-12-02 Display device, in particular for cooktops
PCT/EP2011/071631 WO2012076414A1 (de) 2010-12-08 2011-12-02 Anzeigevorrichtung, insbesondere für kochflächen
US13/993,033 US9483983B2 (en) 2010-12-08 2011-12-02 Display device, in particular for cooktops

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EP (2) EP2609373B1 (es)
JP (1) JP5650334B2 (es)
KR (1) KR101572335B1 (es)
CN (1) CN103250004B (es)
CA (1) CA2811187C (es)
DE (2) DE202011052226U1 (es)
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DE102011050867A1 (de) * 2011-06-06 2012-12-06 Schott Ag Hochfeste eingefärbte. beidseitig glatte Glaskeramik als Kochfläche
FR2976683B1 (fr) * 2011-06-15 2013-11-08 Eurokera Article vitroceramique a affichage lumineux colore.
FR2994568B1 (fr) * 2012-08-14 2021-06-04 Eurokera Article vitroceramique a affichage lumineux colore
FR2997942B1 (fr) * 2012-11-14 2019-10-18 Eurokera S.N.C. Article vitroceramique a affichage lumineux
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US9483983B2 (en) 2016-11-01
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CA2811187C (en) 2018-08-21
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