EP4372728A1 - Dispositif d'affichage et système d'interaction homme-machine pour appareil ménager et appareil ménager - Google Patents

Dispositif d'affichage et système d'interaction homme-machine pour appareil ménager et appareil ménager Download PDF

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Publication number
EP4372728A1
EP4372728A1 EP23210263.2A EP23210263A EP4372728A1 EP 4372728 A1 EP4372728 A1 EP 4372728A1 EP 23210263 A EP23210263 A EP 23210263A EP 4372728 A1 EP4372728 A1 EP 4372728A1
Authority
EP
European Patent Office
Prior art keywords
light
display
display device
light guide
carrier
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.)
Pending
Application number
EP23210263.2A
Other languages
German (de)
English (en)
Inventor
Pengfei Sun
Zhongke Li
Xin Wu
Xiaofei Chen
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.)
Diehl AKO Stiftung and Co KG
Original Assignee
Diehl AKO Stiftung and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Diehl AKO Stiftung and Co KG filed Critical Diehl AKO Stiftung and Co KG
Publication of EP4372728A1 publication Critical patent/EP4372728A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/08—Signs, boards or panels, illuminated from behind the insignia using both translucent and non-translucent layers
    • 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
    • G09F9/302—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 characterised by the form or geometrical disposition of the individual elements
    • G09F9/3023—Segmented electronic displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • G09F2013/222—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent with LEDs

Definitions

  • the invention relates to a display device for a household appliance, a human-machine interaction system for a household appliance, and a household appliance.
  • the object of the invention is to provide a display device for a household appliance, a human-machine interaction system for a household appliance and a household appliance which can add a backlight effect to improve the visual impression without significantly increasing the manufacturing costs of the display device and the human-machine interaction system, without having to use a complex display screen.
  • a display device for a household appliance comprising a display film, a circuit board provided with luminous elements and a carrier provided between the display film and the circuit board, wherein the display film has a background display area for displaying a background image which is formed by a plurality of first luminous elements of the luminous elements can be illuminated together, wherein at least one symbol is arranged in the background display area of the display film, wherein a light guide structure is arranged corresponding to each of the at least one symbols, which serves to guide a light emitted by at least one second light element of the light elements to the symbol, and wherein the height of the light guide structure is smaller than the height of the carrier, so that the upper end of the light guide structure is spaced from the display film.
  • the display device consists of the display foil, the carrier and the circuit board, from top to bottom.
  • the carrier is used to attach the display foil above the circuit board at a distance from it.
  • the display film has a background display area for displaying a background image, which can be illuminated jointly by a plurality of first lighting elements of the lighting elements.
  • the background image can be illuminated as a whole in the background display area, thereby providing the user with a visually rich and brilliant backlight effect in the display device, and optimizing the visual impression and user experience.
  • the background display area can be designed, for example, as a light transmission area corresponding to the background image.
  • the light transmission area refers to an area on the substrate of the display film that is designed to be at least partially translucent so that the background image can be displayed to the user when the light transmission area is jointly illuminated by the plurality of first lighting elements arranged on the circuit board.
  • the background image can be colored or formed with colors.
  • the background image can also preferably occupy a relatively large partial area of the entire surface of the display device.
  • the background image may be decorative paintings such as landscapes (e.g. sea water, sunlight, starry sky, clouds, meadows, mountains, etc.), continuous patterns, portraits, abstract drawings, cartoon elements and the like to convey a mood, enhance texture or arouse interest.
  • the background image may also be a subject image such as a sign, a state diagram, a usage step diagram, etc.; however, a plain text layout may also be considered, such as texts identifying the model and purpose of the home appliance or describing the operation of the home appliance to provide useful information to the user of the home appliance.
  • the background display area is generally in the center of the display sheet. However, it is also possible to arrange the background display area at one side or corner of the entire display sheet, or it is possible to provide multiple background display areas in a single display sheet.
  • At least one symbol is provided in the background display area.
  • the at least one symbol can be understood as a symbol that is surrounded by the background image or superimposed on it.
  • the symbol can be designed as a light transmission area corresponding to the content of the symbol, e.g. as an area on the substrate of the display film that is at least partially, in particular completely, transparent to light, so that when the light transmission area is illuminated, it is possible to show the user the content of the symbol, i.e. to display characters and/or patterns that correspond to the content of the symbol, wherein the characters and/or patterns can include words, numbers, emblems, badges and the like in order to show the user information, states and/or functions etc. of the household appliance.
  • the symbol can preferably be colored or designed with color.
  • a light-guiding structure corresponding to each of the at least one symbols is provided, wherein the light-guiding structure is used to guide light emitted by at least one second light element of the light elements to the symbol depending on the position, and wherein the height of the light-guiding structure is smaller than the height of the carrier, so that the upper end of the light-guiding structure is spaced apart from the display film.
  • a light-guiding structure is formed for the at least one second light element assigned to the symbol, so that the light emitted by the at least one second light element is directed specifically to the symbol in the background image.
  • the user can easily see whether a symbol is illuminated or not, even in the illuminated background image.
  • the symbol can be highlighted in the background image with significantly greater brightness when illuminated, so that the user can clearly see information, functions and/or operating processes via the household appliance. Since the height of the light guide structure is smaller than the height of the carrier and thus the upper end of the light guide structure is spaced from the display foil, the highest point of the light guide structure does not touch the display foil.
  • the display device is not only capable of producing a brilliant backlight effect, thereby enriching the display content, creating an impressive visual experience, and creating a design-rich atmosphere, but is also capable of harmoniously integrating the icons whose illuminated and unilluminated states can be well distinguished into the background image, whereby the icons and the background image harmonize with each other and the overall image of the display device forms a harmonious whole.
  • the display device can present a display effect similar to that of a display screen, in particular a TFT display screen, by merely modifying the structure of a conventional support and arranging lighting elements accordingly, which not only does not significantly increase the manufacturing cost compared with a conventional icon display device, but also eliminates the need to use an expensive display screen.
  • the light-guiding structure is designed as a light-guiding hole and/or a light-guiding rod.
  • various solutions as light-guiding structures can be considered. If a light-guiding hole is used, the second light-guiding element, which is located in the lower region of the light-guiding hole, in particular below the light-guiding hole or is housed in the base of the light-guiding hole, can emit its light into the light-guiding hole, wherein the light is intensively projected onto the symbol.
  • the second light-guiding element which is located in the lower region of the light-guiding rod, in particular below the light-guiding rod or is housed in the base of the light-guiding rod, can couple its light into the light-guiding rod, wherein the light is intensively transmitted to the symbol with less loss.
  • the light guide hole is formed by hollow structures made of an opaque or translucent material and/or the light guide rod is made of a transparent material.
  • the light guide hole is formed by a hollow structure with a hole running from top to bottom, which consists of an opaque or translucent material, in particular a plastic material.
  • the hollow structure can, for example, have a laterally closed wall, which surrounds a light guide hole.
  • the light guide hole can have a cross section that resembles the contour of the symbol.
  • a circular light guide hole is formed according to a circular symbol, while a square light guide hole is formed according to a square symbol.
  • the light guide rod can consist of a transparent material, e.g.
  • the light guide rod can in particular also have a cross section that resembles the contour of the symbol.
  • a circular light guide rod is formed according to a circular symbol
  • a square light guide rod is formed according to a square symbol.
  • the second light element is accommodated inside the light guide rod.
  • an opening is formed in the carrier corresponding to the background display area.
  • the opening means that a part of the carrier corresponding to the background display area is hollowed out continuously from top to bottom.
  • the plurality of first lighting elements can illuminate the background display area together without hindrance.
  • at least one depression can be formed in the carrier corresponding to the background display area, in the underside of which light passage openings are provided for the plurality of first lighting elements, the height of the light passage openings being smaller than the height of the light guide structure.
  • the depression here means that in an area of the carrier that corresponds to the background display area, a Carrier has a recess or trough which is recessed downwards, as a result of which the display film and the carrier can be spaced apart from one another in the background display area.
  • light transmission openings can be provided in an underside of the recess for the first lighting elements, the light transmission openings being broken through from the underside of the recess to an underside of the entire carrier. This allows the light emitted by the first lighting elements which are located in or under the light transmission openings to enter the recess and thus illuminate the background display area on the display film.
  • the height of the light transmission openings can be greater than, equal to or smaller than the height of the first lighting elements, provided that the background image is jointly illuminated as required by the plurality of first lighting elements. It should be noted that in many cases the light transmission openings are not intended to limit the radiation range of the light, but rather to stabilize the mechanical structure of the entire carrier through the underside of the recess.
  • the light from the first lighting elements can be projected into the recess at a larger beam angle, which is why it is expedient to form the light transmission openings approximately flush with the first lighting elements or to form the first lighting elements so as to protrude beyond the light transmission openings on the underside of the recess in order to limit the beam angle of the first lighting elements as little as possible.
  • the light guide structure is advantageously connected to the circuit board or to the recess, or the light guide structure is connected to the carrier via a connecting web or is formed in one piece with the carrier.
  • the light guide structure can be attached to the display device in a variety of ways. For example, it is conceivable that the light guide structure is glued, latched, riveted or welded to the underside of the circuit board or the recess or in a through hole in the recess. However, it is also conceivable that the light guide structure is connected to the carrier via an additional connecting web, or that the light guide structure is formed in one piece with the carrier. In addition, when using multiple light guide structures, it is also conceivable to connect the individual light guide structures to one another via connecting webs in order to increase positional stability and simplify assembly.
  • the upper end of the light guide structure is spaced from the display foil at a distance of between 0.8 and 3 mm.
  • the upper end of the light guide structure is spaced 1 mm from the display foil.
  • a light transmission plate is arranged in the opening or the recess of the carrier. Since the display film in the background display area cannot be held by the carrier, the display film may collapse if an external force acts on the background display area. In order to prevent a collapse from occurring, it is possible to fill the opening or the recess with the light transmission plate so that a height difference between the opening or the recess to the top of the carrier is compensated so that the display film can be held on the filled light transmission plate.
  • the light transmission plate can be arranged flush with an upper side of the carrier when received in the opening or the recess.
  • the light transmission plate can be connected to the carrier in order to prevent the light transmission plate from shaking in the opening or the recess due to dimensional tolerances.
  • the light transmission plate is advantageously designed with dome-like recesses for the first light elements or with projections that protrude into the light transmission openings.
  • each first light element is assigned a dome-like recess.
  • the display film is provided with at least one pair of attachments for gluing onto the side edges of the carrier.
  • the periphery of the display film in particular at least two long sides, provides opposing lugs which can be glued to the sides of the carrier so that the display film is stretched on the carrier to counteract the external forces which would cause the background display area of the display film to collapse in the direction of the recess.
  • interruption points are cut between the projections and the display film.
  • the substrate of the display film which has a certain hardness, can be bent more precisely and easily.
  • the several interruption points can be cut with an interruption knife or laser.
  • a further symbol is provided outside the background display area, which can be individually illuminated.
  • the further symbol can in particular be a separate or individually illuminated symbol of conventional display devices.
  • the further symbol can be equipped with a further light-guiding structure, wherein the further light-guiding structure rests on the display film.
  • the further light-guiding structure can also comprise a light-guiding hole or a light-guiding rod.
  • the light-guiding hole can in particular be designed as a through hole in the carrier, which penetrates the carrier from the top of the carrier to its underside, whereby the third light element arranged in the through hole can individually illuminate the further symbol arranged above the through hole.
  • a light-shielding layer can be provided, in particular on the outside of such a light-guiding rod.
  • the switching on and off, the brightness and/or the color of the first and/or the second lighting element can be adjusted.
  • an adjustable lighting element is advantageously used.
  • the lighting elements can be the several first lighting elements for jointly illuminating the background display area, the at least one second lighting element for illuminating the symbol in the background display area and/or a third lighting element for illuminating the further Symbol outside the background display area.
  • dynamic effects can be added to the display device, in particular its background image. It is particularly advantageous that the background image is enriched with dynamic change effects by the plurality of first lighting elements being adjustable for jointly illuminating the background display area.
  • the background image should be displayed in the display device by changing the switching on and off of the plurality of first lighting elements. It is also possible to make the background image flicker by switching back and forth between switching on and off.
  • the first lighting elements are switched on and off at different locations with an offset and alternately in order to achieve a constantly changing lighting layout, so that even a single background image can be animated, thereby enriching the visual experience.
  • the color of each light element can be adjusted, for example, the color of the light element can be changed from yellow to red or from warm yellow to cool white, thereby changing the tone of the background image.
  • the brightness of these light elements can also be adjusted, for example, by gradually brightening and/or darkening the light elements like a breathing lamp, so that a more subtle change of light and shadow is achieved.
  • light elements that can be adjusted in multiple brightness levels, especially in a dozen different brightness levels, can be used to achieve a subtle brightness change effect.
  • the display film is a color film; and/or the carrier is designed as an injection molded part.
  • the display film designed as a color film can be understood, for example, in such a way that colored symbols, a colored background image or also a colored additional symbol, if present, is printed on the substrate of the display film, while the rest of the display film is printed with opaque ink, so that the colored symbols and the colored background image appear when the display film is illuminated by individual light elements.
  • This makes it possible to achieve a colorful display effect by using only monochromatic light elements, which is advantageous for reducing manufacturing costs.
  • it is possible to produce the carrier by an injection molding process which increases the production rate and reduces manufacturing costs in mass production. However, other processes such as casting, 3D printing, laser cutting, etc. can also be used.
  • the light guide hole, the through hole, the light passage openings and/or the recess are made increasingly smaller in the direction of the circuit board.
  • the dimensions of the light guide hole, the through hole, the light passage openings and/or the recess are each tapered in the direction of the circuit board.
  • bevels, steps or curved surfaces etc. are formed which are inclined accordingly towards the circuit board or the underside of the recess.
  • the inner wall of the light guide hole and the side edges of the carrier can also have similar bevels.
  • the second object is achieved according to the invention by a human-machine interaction system for a household appliance, which comprises a display device according to the invention and a touch and/or proximity sensor system.
  • the human-machine interaction system also provides human-machine interaction functions while adding background lighting effects and enhancing visual perception, thus enabling control of the household appliance and provision of visual feedback using the human-machine interaction system.
  • the touch and/or proximity sensor system has a touch-sensitive layer that is glued or printed onto a display film of the display device.
  • the touch-sensitive layer can be, for example, a touch-sensitive film or a touch-sensitive printed circuit for detecting touches by a user.
  • the touch-sensitive film or the touch-sensitive printed circuit can be arranged on each side of the display film of the display device.
  • the touch-sensitive film contains, for example, conductive electrodes that are embedded in a transparent dielectric material.
  • the conductive electrodes themselves are very thin and consist of almost completely transparent material, so that they have a high level of light permeability, which in turn does not affect the display of the symbols and/or the background image.
  • the touch and/or proximity sensor is expediently designed as an infrared sensor, a capacitive sensor, a resistive sensor, an inductive sensor, a pressure sensor or an acoustic sensor. This touch and/or proximity sensor can be provided outside or inside the display device, in particular integrated on the circuit board of the display device and accommodated in the light guide hole, the light transmission openings or the through hole.
  • an infrared sensor can be accommodated in the light guide hole, the light passage openings or the through hole, the infrared sensor comprising an infrared transmitter tube and an infrared receiver tube which are spaced apart from one another in order to detect the touch of a user's finger or the proximity of a user's finger to the surface of the display device. It is also possible to provide a separate infrared light guide hole in the carrier for the infrared sensor. It goes without saying that the display film of the display device is accordingly infrared-transparent and that the detection circuit for the infrared sensor is accordingly provided in the circuit board.
  • the third object relates to a household appliance comprising a display device according to the invention or a human-machine interaction system according to the invention.
  • the household appliance is an air conditioner, a cooker hood, a stove, a water heater, a refrigerator, an oven, a dishwasher, a food processor, a washing machine, a dryer, a stereo system, a television, a smart faucet or a smart toilet.
  • FIG.1 shows a perspective exploded view of a display device according to a first embodiment.
  • a display device 10 for a household appliance comprises: a display film 1, a circuit board 2 provided with lighting elements and a carrier 3 provided between the display film 1 and the circuit board 2.
  • the display film 1 is lifted off the carrier 3 in order to show a detailed arrangement below the display film 1.
  • the display film 1 has a background display area 5 for displaying a background image 6, which can be illuminated jointly by a plurality of first lighting elements 4 of the lighting elements.
  • the background display area 5, which is filled with grid lines in the respective drawings, can be understood, for example, as a light transmission area corresponding to the background image 6, i.e. an area that is at least partially transparent to light on the substrate of the display film 1.
  • the background image can be colored or formed with colors.
  • the background image can in particular be decorative paintings, such as landscapes (e.g. sea water, sunlight, starry sky, clouds, meadows, mountains, etc.), continuous patterns, portraits, abstract drawings, cartoon elements and the like.
  • the background image can also be a motif image, such as a sign, a state diagram, a usage step diagram, etc.; or the background image can be a plain text layout, such as texts that identify the model and purpose of the household appliance or describe the functioning of the household appliance.
  • the background display region 5 shown in the drawings is arranged in the center of the display sheet 1, it is also conceivable that the background display region 5 is arranged deviating from the center at a side or a corner of the entire display sheet 1, or that a plurality of background display regions 5 may be provided in one display sheet 1.
  • At least one symbol, here two black symbols 7, is arranged in the background display area 5.
  • the symbol 7 can be understood to mean a symbol 7 that is surrounded by the background image 6 or overlays the background image 6.
  • the symbol 7 can be designed as a light transmission area corresponding to the content of the symbol, e.g. as an area on the substrate of the display film 1 that is at least partially, in particular completely, transparent to light, so that when the light transmission area is illuminated, it is possible to show the user the content of the symbol, i.e. to display characters and/or patterns that correspond to the content of the symbol, wherein the characters and/or patterns can include words, numbers, emblems, badges and the like in order to display information, states and/or functions etc. of the household appliance to the user.
  • the symbol 7 can preferably be displayed in color or with colors.
  • each of the at least one symbol 7 is assigned a light guide structure.
  • the light guide structure is designed as a light guide hole 8.
  • the light guide hole 8 can be formed by a hollow structure 12 with a hole running through from top to bottom.
  • the light guide hole 8 is used to guide light emitted by at least one (not shown) second light element of the light elements to the symbol 7.
  • the height of the light guide structure is smaller than the height of the carrier 3. The height up to the upper end of the light guide hole 8, i.e.
  • the height up to the upper end 11 of the hollow structure 12 that forms the light guide hole 8 is smaller than the height up to the top 13 of the carrier 3, so that the upper end of the light guide hole 8 is spaced from the display film 1.
  • the light guide hole 8 can be formed by a hollow structure 12 that consists of an opaque or translucent material.
  • Fig.2 shows a perspective exploded view of a display device according to a second embodiment.
  • a display device 10 for a household appliance also comprises a display film 1, a circuit board 2 and a carrier 3.
  • the display film 1 also has a background display area 5 for displaying a background image 6, which can be illuminated jointly by several first lighting elements 4 of the lighting elements and in which at least one symbol 7 is arranged.
  • a light guide structure is also provided, which is assigned to each of the at least one symbol 7.
  • the light guide structure is designed as a light guide rod 16.
  • the light guide rod 16 serves to guide light emitted by at least one (not shown) second light element of the light elements to the symbol 7. And in the assembled state of the display device 10, the upper end 17 of the light guide rod 16 is also spaced apart from the display film 1.
  • the light guide rod 16 is preferably made of a transparent material such as polymethyl methacrylate (PMMA), polycarbonate (PC), epoxy resin, glass or the like.
  • Fig.3 shows a schematic sectional view of a display device according to the second embodiment. It can be clearly seen from the figure that in the assembled state of the display device 10, a light guide rod 16 is assigned to each symbol 7 in the background display area 5. And the height of the light guide rod 16 is smaller than the height of the carrier 3, so that the upper end 17 of the light guide rod 16 is spaced apart from the display film 1. This means that the upper end 17 of the light guide rod 16 is not in contact with the display film 1, but rather there is still a gap 20 between the light guide rod 16 and the display film 1, which allows light emitted by the first light elements 4 to partially penetrate under the symbol 7.
  • the background display area 5 can be illuminated jointly by a plurality of first lighting elements 4.
  • the background image 6 in the background display area 5 can be illuminated as a whole, thereby providing the user with a visually rich and brilliant backlight effect in the display device, and optimizing the visual impression and user experience.
  • a light guide structure 16 i.e. a light guide hole 8 or a light guide rod 16 is assigned to each symbol 7 in the background display area 5.
  • a light guide structure 16 can guide the light emitted by the second light element 18 to the symbol 7 in a more concentrated manner. Due to such an arrangement, the symbol 7, when illuminated, is able to stand out in the background image 6 with a much greater brightness, which enables the user to clearly recognize the information, functions and/or operation associated with the household appliance.
  • the upper end 17 of the light guide structure ie the upper end 17 of the light guide rod 16 is spaced from the display film 1, so that a gap 20 is formed, which it allows the light emitted by the plurality of first light elements 4 away from the light guide structure to partially penetrate under the symbol 7 and illuminate it slightly, so that firstly the symbols 7 are faintly visible even when not illuminated by the second light element 18, and secondly no dark area is created in the background image 6 that impairs the harmonious overall impression.
  • the symbols 7 are integrated into the background image 6 in such a way that their states illuminated by the second light element 18 and unilluminated can be easily distinguished.
  • the display device 10 thus offers a harmonious overall visual effect while maintaining its good display function.
  • the carrier 3 itself serves as a light-conducting component to guide the light emitted by the light element on the circuit board 2 to the display film 1.
  • the carrier 3 rests against the display film 1, wherein the contact includes both a direct contact and an indirect contact, i.e. other functional layers can also be attached between the carrier 3 and the display film 1.
  • the statement "is spaced apart from the display film 1" refers to the contact of the carrier 3 against the display film 1, i.e. the height of the upper end 17 of the light-conducting structure, which corresponds to the symbol 7, is smaller than the height of the carrier 3 as a light-conducting component, so that a gap 20 is formed between the upper end 17 of the light-conducting structure and the display film 1.
  • the gap 20 allows the light emitted by the plurality of first light elements 4 away from the light guide structure to penetrate into the gap 20 and slightly backlight the symbol 7.
  • the display device 10 is not only capable of presenting a brilliant backlight effect, thereby enriching the display content, creating an impressive visual experience, and creating a design-rich atmosphere, but also capable of harmoniously integrating the icons 7, whose illuminated and unilluminated states can be well distinguished, into the background image 6, whereby the icons 7 and the background image 6 harmonize with each other and the overall image of the display device 10 forms a harmonious whole.
  • the display device 10 can produce a display effect similar to that of a display screen, which not only does not significantly increase the manufacturing cost compared with a conventional icon display device, but also eliminates the need to use an expensive display screen.
  • an opening is formed in the carrier 3 which corresponds to the background display area 5 so that the background display area 5 can be illuminated jointly by the plurality of first lighting elements 4.
  • This opening means that a part of the carrier 3 corresponding to the background display area 5 is hollowed out continuously from top to bottom.
  • the carrier 3 is thus designed as a hollow frame.
  • the carrier 3 is surrounded by four sides 14 and has an upper side 13 and a lower side 19.
  • the display film 1 rests on the upper side 13 of the carrier 3, while the circuit board 2 rests on the lower side 19 of the carrier 3.
  • the opening 15 forms a cavity with the display film 1 and the circuit board 2 in the assembled state of the display device 10.
  • several first lighting elements 4 can emit light unhindered into the cavity, whereby the background display area 5 is illuminated jointly.
  • the light guide structure i.e. the light guide hole 8 or the light guide rod 16, in the display device 10
  • the light guide structure is connected to the circuit board 2 or is connected to the carrier 3 via a connecting bridge.
  • the Fig. 1 to 3 The light guide holes 8 or light guide rods 16 shown can also be connected to one another by connecting webs.
  • Fig.3 also shows a preferred arrangement of a receptacle for second light elements 18 in the interior of the light guide rods 16 in order to increase the coupling power of the light guide rods 16 at the entrance.
  • the upper end of the light-guiding structure can be spaced from the display film 1 by a distance of between 0.8 and 3 mm, in particular by a distance of 1 mm.
  • This distance can also be the dimension of the gap between the upper end 11 of the hollow structure forming the light-guiding hole 8 and the display film 1, the dimension of the gap 20 between the upper end 17 of the light-guiding rod 16 and the display film 1, or as the height difference between the height of the carrier 3 measured from the upper side 13 to the lower side 19 and the height of the light guide hole 8 or the light guide rod 16.
  • This distance can reliably ensure that the light emitted by the first light elements 4 can at least weakly penetrate under the symbol 7.
  • the switching on and off the brightness and/or the color of the first lighting elements 4 and/or the second lighting element 18 can be adjusted.
  • the display film 1 can be a colored film.
  • the carrier 3 can be designed as an injection-molded part, in particular as a white injection-molded part that is favorable for light emission.
  • Fig.4 shows a schematic representation of a display film of a display device according to a third embodiment.
  • the display film 1 in Fig.4 comprises a background display area 5 in the middle for displaying a background image 6, and within the background display area 5, two black symbols 7 are provided as an example.
  • a total of eleven further symbols 21 are arranged on both sides of the background display area 5, which are not surrounded or superimposed by the background image 6.
  • the black part of each further symbol 21 corresponds to a light transmission area of the symbol content, which light transmission area makes the symbol content visible to the user when illuminated.
  • the further symbols 21 can also be patterns and/or characters.
  • Fig.4 two numerical symbol groups 22 in the form of the number 8 are also shown as additional symbols.
  • the numerical symbol groups 22 comprise seven smaller symbols in close proximity to one another (7-segment display), so that one or more of these smaller symbols can be selectively illuminated in order to show the user numerical information. It is also possible to show the user information, states and/or functions of the household appliance, etc. using these additional symbols 21.
  • Fig.5 shows a perspective exploded view of a display device according to the third embodiment.
  • the display device 10 also comprises, from top to bottom, a display film 1, a circuit board 2 provided with light elements and a 2 provided carrier 3.
  • the Fig.5 The display device 10 shown uses the Fig.4 shown display slide 1, which is why further details on the display slide 1 in Fig.5 are not shown.
  • each symbol 7 in the background display area 5 is also assigned a light guide structure, here a light guide hole 8.
  • the light guide hole 8 is also used to guide light emitted by at least one second light element 18 of the light elements to the symbol 7.
  • the upper end 11 of the light guide hole 8 is spaced from the display foil 1.
  • a recess 23 corresponding to the background display area 5 is formed in the carrier 3.
  • the recess 23 means that in an area of the carrier 3 that corresponds to the background display area 5, a recess or trough is formed that is recessed downwards relative to the top side 13 of the carrier 3, which allows the display film 1 and the carrier 3 to be spaced apart from one another in the background display area 5.
  • light transmission openings 25 for the first lighting elements 4 are provided in an underside 24 of the recess 23.
  • the light passage openings 25 extend from the underside 24 of the recess 23 to a bottom side 19 of the entire carrier 3.
  • the height of the light passage openings 25 is smaller than the height of the light-guiding structure, here the light-guiding hole 8, whereby light emitted by the first light elements 4 located in or under the respective light passage openings 25 can shine into the recess 23 and thus illuminate the background display area 5 on the display film 1 and partially penetrate under the symbol 7.
  • the light-guiding hole 8 is connected to the underside 24 of the recess 23, in particular molded onto it.
  • each additional symbol 21 is assigned a further light guide structure which is in contact with the display foil 1.
  • the further light guide structure is designed as a through hole 27 in the carrier 3, ie the through hole 27 is formed in one piece in the carrier 3.
  • the through hole 27 runs from the top 13 of the carrier 3 to its bottom 19, which enables the third lighting elements 26 located in the through hole 27 to individually illuminate further symbols 21 located above the through hole 27.
  • the through hole 27 greatly limits the lighting range of the third lighting elements 26.
  • the through hole formed in this way 27 acts not only as a light condenser, but also as a light shield between various other symbols 21.
  • the other symbols 21 can be independently illuminated by the third light elements 26 in the through hole 27, while the first light elements 4 located in or under the light transmission openings 25 can jointly illuminate the background image 6 in the background display area 5.
  • a hollow structure 12 is conceivable which protrudes above the underside 24 of the recess 23 and which surrounds a cavity of the light guide hole 8.
  • the carrier 3, the through hole 27, the recess 23, the light passage openings 25 and the light guide hole 8 can be produced in this embodiment by an integral injection molding process which is inexpensive in terms of the production material and simple in terms of the process, thereby reducing the manufacturing costs.
  • the shape of the light guide hole 8 can in particular also be adapted to the shape of the symbol 7.
  • regular shapes such as circles, ovals or other, even irregular shapes are also conceivable.
  • Fig.6 shows a front view of a carrier of a display device according to the third embodiment. It becomes clear by comparing the Fig.6 shown carrier 3 with the in Fig.4 shown display film 1 that the background display area 5 corresponds to the bottom 24 of the recess 23 and a plurality of light transmission openings 25 are evenly distributed in the bottom 24 of the recess 23.
  • each further symbol 21 corresponds to a through hole 27.
  • the seven smaller symbols from the numerical symbol group 11' in the form of the number 8 are also provided with seven through holes 27 in a corresponding shape.
  • Fig.7 shows a perspective view of a carrier of a display device according to the third embodiment along the section line AA. It can be seen that the light guide hole 8 is surrounded by a hollow structure 12 which protrudes on the underside 24 of the recess 23, and the light guide hole 8 passes from the upper end 11 of the light guide hole 8 to the underside 19 of the carrier 3.
  • the light passage openings 25 pass from the underside 24 of the recess 23 to the underside 19 of the carrier 3, and the through hole 27 passes from the top 13 of the carrier 3 to its underside 19.
  • the figure shows the height ratio of the light guide hole 8, light passage openings 25 and through hole 27, namely the height of the The height of the light guide hole 8 is greater than the height of the light passage openings 25 and smaller than the height of the through hole 27.
  • the heights of the holes are measured in a direction perpendicular to the upper side 13 of the carrier 3, i.e. in the vertical direction.
  • the recess 23 is configured to taper towards the underside 19 of the carrier 3. This means that the area of the recess 23 gradually decreases from the top side 13 of the carrier 3 to the underside 24 of the recess 23, for which purpose a slope 29 is formed in the recess 23 which is inclined towards the underside 24 of the recess 23. With the help of this slope 29, the carrier 3 can be demolded more easily during injection molding.
  • Fig.8 shows a sectional view of a carrier of a display device according to the third embodiment along the section line AA.
  • the height measured in the vertical direction is designated: the height of the support 3 is designated with h; the height of the through hole 27 is designated with h1; the height of the light passage openings 25 is designated with h2; the height of the light guide hole 8 is designated with h3.
  • the height h of the carrier 3 corresponds to the height h1 of the through hole 27 and the height h3 of the light guide hole 8 is greater than the height h2 of the light passage openings 25 and smaller than the height h1 of the through hole 27 or the height h of the carrier 3.
  • the height h3 of the light guide hole 8 is 0.8 mm to 3 mm, in particular 1 mm, smaller than the height h1 of the through hole 27.
  • Fig.8 It is also shown that the plane 30, in which the lower ends of the light passage openings 25 and the light guide hole 8 are located, is slightly raised compared to the underside 19 of the carrier 3. In this way, on the one hand, it is avoided that unevenness of the circuit board 2 due to manufacturing tolerances makes it difficult for the carrier 3 to be placed flat, and on the other hand, that the carrier 3 squeezes or rubs the wiring on the circuit board 2 for the respective lighting elements.
  • Fig.9 shows a perspective view of a carrier of a display device according to the third embodiment along the section line BB.
  • the plane 30 in which the lower ends of the light guide hole 8 and the light passage openings 25 are located is slightly raised compared to the underside 19 of the carrier 3.
  • the light guide hole 8 is tapered towards the underside 19 of the carrier 3. This means that the dimensions of the light guide hole 8 from its upper end 11 to the underside 19 of the carrier 3 or to the gradually decrease towards plane 30. For this reason, a further slope 31 inclined towards plane 30 is formed in the light guide hole 8. With the help of this further slope 31, the carrier 3 can also be demolded more easily during injection molding.
  • Fig.10 shows a schematic sectional view of a carrier of a display device according to a fourth embodiment.
  • the carrier 3 is essentially constructed in the same way as the carrier in the third embodiment according to the Fig. 6 to 9 , but with the difference that each symbol 21 is assigned a light guide rod 16.
  • the light guide rod 16 is provided here on an underside 24 of the recess 23. Below the light guide rod 16, the light from the second lighting elements 18 is also coupled into the lower end of the light guide rod 16 via the light transmission openings 25 on the underside 24.
  • the light guide rod 16 can also be provided directly in a through hole in the recess 23, ie the recess 23 is provided with a through hole corresponding to the respective symbol 7, in which the light guide rod 16 is inserted.
  • the upper end 17 of the light guide rod 16 arranged in this way is also spaced from the display film 1 by a gap 20.
  • the dimension s of the gap 20 can preferably be between 0.8 mm and 3 mm, in particular 1 mm.
  • the light guide rod 16 can be glued, clamped, welded or riveted, for example, to the underside 24 of the recess 23 or in the through hole of the recess 23.
  • the aforementioned recess 23 in the third and fourth embodiments can also be omitted and, for example, as with reference to the Fig. 1 to 3 shown, the light guide hole 8 in the third embodiment or the light guide rod 16 in the fourth embodiment individually form a hollow structure formed in the carrier 3 corresponding to the background display area 5.
  • the through hole 27 is also formed integrally on the carrier 3, while the light guide hole 8 or the light guide rod 16 are connected to the through hole 27 and/or the carrier 3 with the above-mentioned fastening types.
  • Fig. 11 shows a schematic representation of a display film of a display device according to a preferred embodiment.
  • the display film 1 shown in this figure is provided with a pair of projections 32 for gluing to the side edges of the carrier, whereby the adhesive surface of the display film 1 on the carrier 3 is increased.
  • Fig. 11 As shown, two projections 32 of the two long sides of the display film 1 protrude opposite each other. By gluing such projections 32 onto the side edges 14 of the carrier 3, the display film 1 is stretched onto the carrier 3 to counteract the external forces which cause the background display area 5 of the display film 1 to collapse towards the recess 23.
  • Fig. 11 also shows a plurality of break points P cut between the lugs 32 and the display sheet 1. By providing these break points P, the substrate of the display sheet 1 can be bent more accurately and easily with a certain hardness. The plurality of break points P can be cut with a break knife or laser.
  • the light transmission plate can be held on the circuit board 2 or on the underside 24 of the recess 23 and accordingly be provided with a structure that leaves out the light guide hole 8 or the light guide rod 16, so that the display film 1 can also be held well in the background display area 5.
  • the light transmission plate is preferably designed with dome-like recesses for the first light elements 4 or projections protruding into the light transmission openings 25.
  • Fig. 12 shows a schematic sectional view of a human-machine interaction system according to an embodiment.
  • the human-machine interaction system 100 comprises a display device 10 and a touch and/or proximity sensor system.
  • the touch and/or proximity sensor system in Fig. 12 is designed as a touch-sensitive layer 33, which is glued or printed on a display film 1 of the display device 10, for example.
  • the touch-sensitive layer 33 is shown on a bottom side of the display film 1, but it is also conceivable to place it on a top side of the display film 1.
  • the touch and/or proximity sensor system can be designed as an infrared sensor system, a capacitive sensor system, a resistive sensor system, an inductive sensor system, a pressure sensor system or an acoustic sensor system.
  • Fig. 12 shown that in an assembled state of the display device 10 or the human-machine interaction system 100, the underside 24 the recess 23 of the display device 10 is approximately flush with the first light elements 4 on the circuit board 2, here slightly lower than the underside 24 of the recess 23 or than the light passage openings 25.
  • the light of the first light elements 4 can be projected into the recess 23 at a comparatively large beam angle, so that the background image 6 is illuminated with a comparatively large surface area.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
EP23210263.2A 2022-11-18 2023-11-16 Dispositif d'affichage et système d'interaction homme-machine pour appareil ménager et appareil ménager Pending EP4372728A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223077396.9U CN218471000U (zh) 2022-11-18 2022-11-18 用于家用电器的显示装置、人机交互设备和家用电器

Publications (1)

Publication Number Publication Date
EP4372728A1 true EP4372728A1 (fr) 2024-05-22

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Application Number Title Priority Date Filing Date
EP23210263.2A Pending EP4372728A1 (fr) 2022-11-18 2023-11-16 Dispositif d'affichage et système d'interaction homme-machine pour appareil ménager et appareil ménager

Country Status (3)

Country Link
EP (1) EP4372728A1 (fr)
CN (1) CN218471000U (fr)
DE (1) DE202023106740U1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015091806A1 (fr) * 2013-12-19 2015-06-25 BSH Hausgeräte GmbH Champ de commande et d'affichage à lumière modulée
EP3232428A1 (fr) * 2016-04-13 2017-10-18 E.G.O. ELEKTRO-GERÄTEBAU GmbH Élément d'affichage, afficheur comprenant un tel élément d'affichage et appareil électrique doté d'un tel afficheur
DE202018001855U1 (de) * 2018-04-12 2019-07-17 Diehl Ako Stiftung & Co. Kg Anzeigevorrichtung für ein Bedienpanel eines elektronischen Haushaltsgeräts
CN211858041U (zh) * 2020-04-09 2020-11-03 浙江绍兴苏泊尔生活电器有限公司 显示组件及家用电器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015091806A1 (fr) * 2013-12-19 2015-06-25 BSH Hausgeräte GmbH Champ de commande et d'affichage à lumière modulée
EP3232428A1 (fr) * 2016-04-13 2017-10-18 E.G.O. ELEKTRO-GERÄTEBAU GmbH Élément d'affichage, afficheur comprenant un tel élément d'affichage et appareil électrique doté d'un tel afficheur
DE202018001855U1 (de) * 2018-04-12 2019-07-17 Diehl Ako Stiftung & Co. Kg Anzeigevorrichtung für ein Bedienpanel eines elektronischen Haushaltsgeräts
CN211858041U (zh) * 2020-04-09 2020-11-03 浙江绍兴苏泊尔生活电器有限公司 显示组件及家用电器

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CN218471000U (zh) 2023-02-10

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