EP3232428A1 - Élément d'affichage, afficheur comprenant un tel élément d'affichage et appareil électrique doté d'un tel afficheur - Google Patents

Élément d'affichage, afficheur comprenant un tel élément d'affichage et appareil électrique doté d'un tel afficheur Download PDF

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Publication number
EP3232428A1
EP3232428A1 EP17164625.0A EP17164625A EP3232428A1 EP 3232428 A1 EP3232428 A1 EP 3232428A1 EP 17164625 A EP17164625 A EP 17164625A EP 3232428 A1 EP3232428 A1 EP 3232428A1
Authority
EP
European Patent Office
Prior art keywords
display
display element
spacers
housing
light
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.)
Granted
Application number
EP17164625.0A
Other languages
German (de)
English (en)
Other versions
EP3232428B1 (fr
Inventor
Andreas Richter
Michael Rominger
Dennis Schmid
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
Original Assignee
EGO Elektro Geratebau GmbH
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 EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Priority to PL17164625T priority Critical patent/PL3232428T3/pl
Publication of EP3232428A1 publication Critical patent/EP3232428A1/fr
Application granted granted Critical
Publication of EP3232428B1 publication Critical patent/EP3232428B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G09F13/20—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 element for a display device, a display device provided with such a display device and an electrical appliance with such a display device.
  • Indicators for a display device which have a luminous display function and, moreover, even an operating function, are known in the art EP 2809006 A1 known.
  • a display housing In a display housing is a Lichtleitkanal in the form of a light guide, which is enclosed laterally opaque, so that light can escape only at its top.
  • the light guide channel is surrounded like a frame of elastic material, which is electrically conductive and has a capacitive sensor element for the operating function.
  • Such display elements can be provided with an operating function designed as corresponding illuminated capacitive sensor elements. Possible arrangements of a plurality of such display elements with operating function are from the DE 102009049559 A1 basically known.
  • the invention has for its object to provide a display element, a display device provided therewith and provided therewith an electrical appliance with which problems of the prior art can be solved and it is particularly possible to provide a practical design of a display element, in particular can be pressed against an underside of a display panel or a cover and it is protected against damage, in particular at the top of the Lichtleitkanals.
  • the display element has a display housing and a light channel therein, which extends continuously from a bottom to an upper side of the display housing.
  • the light guide channel consists of translucent material, advantageously completely transparent for optimum luminous efficacy or translucent for a homogenization of a light indicator.
  • a light source is advantageously provided, for example, at least one LED or SMD LED.
  • the Lichtleitkanal is opaque to the side or surrounded, so that no unwanted luminous phenomenon can occur to the side, which could adversely affect the light display function from above.
  • an opaque coating is applied to the light guide, for example by means of a dipping process or alternatively sprayed. This opaque coating may be a kind of paint. It can be removed either in production of the display element per se or even laterally, so that it is formed in a section that determines the light indicator with its shape. This is basically known and will be explained in more detail below.
  • At least two outer sides of the display housing spacers are provided, which project beyond the top of the Lichtleitkanals or are higher, so over the top of the light channel projecting upwards.
  • the material of the spacer is electrically conductive for an operating function and thus forms a capacitive sensor element at the top of the display element, whereby a capacitive operating sensor is formed.
  • spacers which are made of non-elastic material and / or non-elastic or constructed, serve to abut itself on an underside of a display panel or a cover and that can not abut the top of the Lichtleitkanals with the coating on this underside , By this concern, namely, the coating of the top could be damaged or removed, so that it could lead to unwanted luminous phenomena.
  • the spacers thus form a non-elastic and thus safe protection for the top.
  • a height of the spacers may be variable, in particular depending on the size of the display element.
  • the height of the spacers is about 0.5% to 10% of the height of the entire display element.
  • the spacers should not be too large, so the distance from the top of the light pipe to the bottom of the control panel cover not too big. Thus, the light display function is still sufficiently well to recognize or gives a sufficiently sharp picture.
  • the Lichtleitkanal may be surrounded to the side of opaque plastic, advantageously completely surrounded. It is particularly advantageous possible to produce this in a multi-component injection molding process, for example, polycarbonate or two different materials based on polycarbonate.
  • An underside of the light guide channel is provided or left free for a light entry from a light source arranged thereunder.
  • the top of the light channel has just the opaque coating, in which at least one section may be provided in the form of a symbol or a plurality of symbols for the light display function.
  • the coating also covers the spacers and thus the complete upper side or possibly even the entire upper region of the display element. Also on the sides, the coating may be provided and / or completely cover it.
  • the coating is an easily removable lacquer or is advantageously removable by laser, so that relatively easily and contactlessly the aforementioned cutouts in the form of a symbol or a plurality of symbols can be produced therein to adapt the light display function.
  • the spacers may be provided at least on opposite sides of the display housing.
  • the spacers each extend substantially over the full width of this page, under certain circumstances, the corner areas may be excluded.
  • the spacers are formed on all sides completely encircling the display housing, so that they frame the top of the Lichtleitkanals. Preferably, they frame this without interruption, so they are continuous. Small breaks in the longitudinal course of the spacers may be provided, for example, to allow the introduction of air to the top of the Lichtleitkanals.
  • the material of the spacers is advantageously polycarbonate, but an opaque. It can also be molded onto the light guide channel in a multi-component injection molding process, which is easier with fundamentally similar material.
  • a light guide channel is at least partially provided laterally outwardly and / or downwardly limiting reflector.
  • This reflector is made of opaque material, wherein it is covered on short outer sides of an elongate display housing of the material of the spacers. On long outer sides of an elongated display housing, it can be uncovered laterally outwards, ie itself form an aforementioned outside or outer wall. Above all, such a reflector extends partially obliquely to the upper side of the light guide channel in order to deflect as much light as possible from a light source arranged below the light guide channel upwards for a luminous display function which is as clearly visible as possible.
  • the material of such a reflector should be selected so that it has the best possible reflective effect when brought into contact with a light-transmitting material of the light guide channel at the interface of the two materials.
  • a display housing is oblong, that is not square, then it can be provided that at least one downwardly projecting and over a bottom of the Lichtleitkanals projecting down holding member is provided on short outer sides of the display housing, which are opposite. On these short outsides this is given more space with an elongated display housing than on the long outer sides. If the display housing rather square, it does not matter on which outer sides such retaining members are provided. However, they should be provided on opposite outer sides for a stable mounting on a component carrier.
  • the opaque coating which is applied to the top of the Lichtleitkanals, be applied to all lateral outer sides and the other surface or top of the display housing.
  • it may also be applied to the spacers, wherein it fulfills no purpose here, but just to ensure that the top of the Lichtleitkanals is completely covered.
  • the light guide channel may be surrounded in another embodiment of the invention in its upper region of opaque material.
  • This opaque material may form a peripheral edge, which may for example form a plane plane with the top of the Lichtleitkanals.
  • the opaque material then corresponds to the aforementioned outer sides or outer walls of the display housing made of opaque material.
  • the spacers can be placed on the aforementioned edge on the outer walls around the light guide channel or integrally formed.
  • the spacers are offset 5% to 50% of the width of the edge away from the light guide to the outside and have a distance, so are slightly spaced from the boundary between the inner Lichtleitkanal and outer edge or outer wall. This has the sense that the spacers are advantageously also covered by the same opaque coating as part of the top of the Lichtleitkanals.
  • a distance of the spacers to the light guide channel may be at least 0.05 mm to 0.1 mm.
  • An electrical contact to the capacitive sensor element or to the capacitive operating sensor can take place in that electrically conductive material contacted or departed from the spacer and is easily contacted electrically, for example on a component carrier to which the display element is set.
  • the electrically conductive material of the spacers may be integrally connected to the spacers or to form them in one piece.
  • the material may be integrally formed in the aforementioned holding members for making an electrical contact.
  • at least one hole can be in the component carrier as a receiving opening into which a holding member is inserted.
  • an electrical contact can take place, for example by the receiving openings in the component carrier inside are coated electrically conductive and thus automatically produce the electrically conductive spacers when pressed electrical contact.
  • a display element has a light-conducting body of transparent or transparent material.
  • a reflector may be provided surrounding or molded. This covers the Lichtleitkanal to the side against unwanted light leakage and provides for a strengthening of the lighting upwards.
  • At least in the upper region of the Lichtleitkanal is surrounded on all its sides with electrically conductive and opaque material, which forms outer walls that actually protrude to the height of the top of the Lichtleitkanals or form a substantially planar plane with them. At these edges above the spacers are then formed or stand up from the edges.
  • a cross section or a profile of such a spacer is substantially rectangular.
  • the spacers by being non-elastic, ensure that when the display elements are pressed against undersides of display panels or covers which may not be perfectly flat, the tops of the light guide channels with their sensitive coating are not affected or destroyed or scratched.
  • a display device may comprise a component carrier, on which a plurality of electrical functional units such as in particular a controller and also other parts are arranged. At least one display element according to the invention is arranged on the component carrier, advantageously several. This is on the DE 102009049559 A1 directed.
  • a light source for the light display function is arranged below the light channel of the display element on the component carrier.
  • several light sources or LED per display element can be provided below the light channel.
  • a brighter luminous appearance or a switchable color of a luminous display function can be achieved.
  • An aforementioned hole may also be provided on said component carrier into which a holding member for fastening the display element can be inserted.
  • the holding member advantageously also consists of electrically conductive plastic, an electrical contacting can take place here.
  • the hole on its inside electrically conductive be coated, advantageously as a so-called via.
  • An inventive electrical appliance has a display control panel or a cover, under which a display device according to the invention is arranged.
  • the display device or display elements arranged thereon are advantageously pressed against an underside of the display control panel or the cover.
  • the electrical appliance is a cooking appliance, in particular a hob.
  • Cooktops with hobs made of ceramic glass often have a rough underside on the hob plate, also known as Noppung. Namely, these nubs with a width of a few mm and a height of less than 1 mm could damage the coating on the upper side of the light guide channel in such a way that undesirable light phenomena could occur.
  • the spacers can odgl by carbon fibers. made conductive plastic or polycarbonate. Alternatively, carbon black or graphite could also be used. An ohmic resistance is in the range of less than 300 ⁇ to 3 k ⁇ , so it is relatively well conductive.
  • Fig. 1 is a sectional view through an inventive hob 11 shown as an electrical appliance, as this essentially also the Fig. 1 the aforementioned EP 2809006 A1 equivalent.
  • the hob 11 has a hob plate 13, preferably made of conventional glass-ceramic material with reddish-brown color and low light transmission.
  • An underside of the hob plate 13 has the known knobs 15, which have a distance of a few millimeters to each other and have a height of 0.05 mm to 0.1 mm.
  • a finger can be placed for the above-mentioned operating function with a capacitive sensor element.
  • the light indicator as shown in particular with reference to Fig. 3 well imaginable, be recognized.
  • a display device 18 under the cooktop plate 13 or which rests on the underside 14 with the nubs 15 has a plurality of display elements 20, wherein only one is shown here.
  • the display element 20 is substantially block-shaped and has a display housing 22, as is basically known from the prior art.
  • a Lichtleitkanal 24 is formed of translucent material, advantageously completely transparent polycarbonate.
  • the light guide channel 24 as a component has a bottom 25 and a top 26. At the bottom 25, a free space 27 is formed for arranging a light source 40 underneath.
  • a reflector 28 is integrally formed on the light guide 24 or at its obliquely downwardly and outwardly facing sides.
  • the reflector 28 is made of opaque material, advantageously also polycarbonate, and may be particularly advantageous in an aforementioned multiple-injection process with the Lichtleitkanal 24 is injected together.
  • the interfaces between the two forms a light-reflecting surface to reflect as much light up to the top 26 back.
  • the reflector 28 runs, as the other Sectional view of Fig. 2 shows, along the longer outer sides and laterally along the Lichtleitkanal 24 along, but only up to a certain height, as already from the Fig. 1 can be seen. Along these longer outer sides, part of the reflector 28 is exposed to the outside, which is not a problem.
  • the in the Fig. 1 Cut outer walls 30a and 30c shown are made of a third material, namely electrically conductive material.
  • This is advantageously an aforementioned electrically conductive polycarbonate, which is opaque and thus as well as the reflector 28 terminates the light guide 24 to the side. So no unwanted luminous phenomena can occur.
  • the left outer wall 30a extends up to an upper side 26 of the light guide channel 24 and forms one there Fig. 3 recognizable in plan view circumferential edge. Attached to this edge is a spacer 32a. As the illustrations show well, the spacer 32a is both slightly offset inwardly from the outside of the outer wall 30a and slightly recessed from the transition to the upper surface 26 of the light guide channel 24.
  • the material of the outer walls 30a to 30d and the spacers 32a to 32d is made electrically conductive in the aforementioned manner, advantageously by the addition of short carbon fibers, carbon black or graphite. As a result, it forms a frame-like circumferential capacitive sensor element, which in the Fig. 3 can be seen in plan view. It corresponds in its function approximately to the capacitive sensor element, as it is known from the above EP 2809006 A1 is known. However, it consists here of a non-elastic material, advantageously again polycarbonate, and is non-elastic. Its deformability, which, however, is accompanied only by destruction, is not considered in the context of the invention as a non-elastic property. Also, the apparent thin material thickness or width b of the spacers 32a to 32d with about 0.2 mm to 0.3 mm gives them no elasticity.
  • an aforementioned opaque coating 42 is applied, which only in the Fig. 3 is shown directly, but for the skilled person is easy to imagine.
  • This coating 42 is opaque to the light from a light source 40 having the intensity of light commonly used for such display devices 18.
  • the coating 42 may have a low thickness of less than 0.1 mm, it just has to be opaque to light. It may be a kind of paint or elastic coating which has been permanently applied to the display housing 22 and especially the top 26. Then, in the coating 42 at the top 26, a cutout 43 in symbol form, here as "F", are introduced, advantageously by means of laser.
  • the small lateral distance a of the spacers 32a to 32d to the boundary between the upper side 26 and outer wall 30a to 30d serves to ensure that at the top of the spacer, the coating 42 is likely to be at least partially scraped by the nubs 15. Dissolves the coating 42 then in slightly larger pieces, so is still the inner edge at the foot of the spacers 32a to 32d present, where the coating 42 settles in a slightly greater material thickness and thus does not dissolve so easily. Due to the distance a to the top 26 above the light guide 24 a backup of the whereabouts of the coating 42 is ensured on this top.
  • the short lateral outer walls 30a and 30c down into retaining members 34a and 34b over.
  • These are electrically conductive because the entire continuous material is electrically conductive, advantageously the above-mentioned electrically conductive and opaque polycarbonate.
  • the holding members 34a and 34b in holes 37a and 37b of a component carrier 36 of the display device 18 are inserted and pressed, so hold non-positively, under certain circumstances also by a small deformation.
  • the inner sides of the holes 37a and 37b are electrically conductive coated, advantageously as so-called vias, as they are known from printed circuit board technology and also in the component carrier 36, which is advantageously a common circuit board, can be easily provided.
  • the holes 37a and 37b and their electrical contacting conventional traces can go to a control of the display device, which is not shown here.
  • Similar printed conductors also contact an LED 40 as a light source in the free space 27 under the underside 25 of the light guide channel 24. From the sectional view of Fig. 1 and 2 It can also be seen that the display housing 22 goes around the LED 40 up to the component carrier 36 and thus prevents light emission to the outside. This is done by the LED 40 surrounding reflector 28, which is pulled up to the component carrier 36 down.
  • Fig. 6 From the Fig. 6 can be seen how schematically the representation of the quasi Fig. 4 Accordingly, not only a single LED 40 may be provided, but two LED 40. It could even four LED 40 may be provided. It is with the Fig. 6 possible that two or even more colors are provided by differently colored LED for a more variable light display.
  • the innovation of the present invention thus consists essentially of the provision of the spacers 32a to 32d, which rotate around the top 26 of the Lichtleitkanals 24 and these project upwards and serve as protection. They are non-elastic designed to ensure the protection of the top 26 and the coating 42 thereon. Furthermore, they are electrically conductive and act as capacitive sensor elements for an operating function of the display device 18. Their electrical contact is made via down drawn areas as lateral outer walls 30a and 30c, which pass into holding members 34a and 34b, which in turn are electrically contacted.
  • a plurality of such display elements 20, possibly also with different basic shapes, can according to the above-mentioned DE 102009049559 A1 be provided on the component carrier 36 and form a display device 18, which also works as a control device with capacitive touch sensors.

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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)
EP17164625.0A 2016-04-13 2017-04-03 Élément d'affichage, afficheur comprenant un tel élément d'affichage et appareil électrique doté d'un tel afficheur Active EP3232428B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17164625T PL3232428T3 (pl) 2016-04-13 2017-04-03 Element wyświetlający, urządzenie wyświetlające z takim elementem wyświetlającym i sprzęt elektryczny z takim urządzeniem wyświetlającym

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016206174.7A DE102016206174B4 (de) 2016-04-13 2016-04-13 Anzeigeelement, Anzeigevorrichtung mit einem solchen Anzeigeelement und Elektrogerät mit einer solchen Anzeigevorrichtung

Publications (2)

Publication Number Publication Date
EP3232428A1 true EP3232428A1 (fr) 2017-10-18
EP3232428B1 EP3232428B1 (fr) 2020-05-06

Family

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EP17164625.0A Active EP3232428B1 (fr) 2016-04-13 2017-04-03 Élément d'affichage, afficheur comprenant un tel élément d'affichage et appareil électrique doté d'un tel afficheur

Country Status (4)

Country Link
EP (1) EP3232428B1 (fr)
DE (1) DE102016206174B4 (fr)
ES (1) ES2807534T3 (fr)
PL (1) PL3232428T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3703042A1 (fr) * 2019-03-01 2020-09-02 BSH Hausgeräte GmbH Moyen d'affichage doté d'une film de dispersion
EP4372728A1 (fr) * 2022-11-18 2024-05-22 Diehl AKO Stiftung & Co. KG Dispositif d'affichage et système d'interaction homme-machine pour appareil ménager et appareil ménager

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021110363A1 (de) * 2021-04-22 2022-10-27 OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung Bedienelement und verfahren

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008027220A1 (de) * 2008-06-02 2009-12-03 E.G.O. Elektro-Gerätebau GmbH Anzeigevorrichtung für ein Kochfeld, Kochfeld und Verfahren zum Betrieb einer solchen Anzeigevorrichtung
EP2280484A1 (fr) * 2009-07-28 2011-02-02 E.G.O. Elektro-Gerätebau GmbH Dispositif à élément de détection
DE102009049559A1 (de) 2009-10-07 2011-04-14 E.G.O. Elektro-Gerätebau GmbH Bedieneinrichtung für ein Elektrogerät
DE102012010321A1 (de) * 2012-05-21 2013-11-21 E.G.O. Elektro-Gerätebau GmbH Sensorelementeinrichtung für einen kapazitiven Berührungsschalter einer Bedieneinrichtung,Bedieneinrichtung und Kochfeld
DE102013209847A1 (de) * 2013-05-27 2014-08-21 E.G.O. Elektro-Gerätebau GmbH Lichtleiteinrichtung, Bedieneinrichtung und Verfahren zur Beleuchtung einer Bedieneinrichtung
EP2809006A1 (fr) 2013-05-27 2014-12-03 E.G.O. Elektro-Gerätebau GmbH Élément de commande

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
DE4424847B4 (de) * 1994-07-14 2004-07-29 Schott Glas Einrichtung zur Anzeige von Informationen und von Betriebszuständen an Kochgeräten
DE102013214164A1 (de) * 2013-07-18 2015-02-19 E.G.O. Elektro-Gerätebau GmbH Bedienteil für eine Bedieneinrichtung und Bedieneinrichtung
DE102014226146A1 (de) * 2014-12-17 2016-06-23 Zf Friedrichshafen Ag Anzeigevorrichtung zur Anzeige zumindest eines Symbols, Schaltvorrichtung und Verfahren zum Herstellen einer Anzeigevorrichtung

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008027220A1 (de) * 2008-06-02 2009-12-03 E.G.O. Elektro-Gerätebau GmbH Anzeigevorrichtung für ein Kochfeld, Kochfeld und Verfahren zum Betrieb einer solchen Anzeigevorrichtung
EP2280484A1 (fr) * 2009-07-28 2011-02-02 E.G.O. Elektro-Gerätebau GmbH Dispositif à élément de détection
DE102009049559A1 (de) 2009-10-07 2011-04-14 E.G.O. Elektro-Gerätebau GmbH Bedieneinrichtung für ein Elektrogerät
DE102012010321A1 (de) * 2012-05-21 2013-11-21 E.G.O. Elektro-Gerätebau GmbH Sensorelementeinrichtung für einen kapazitiven Berührungsschalter einer Bedieneinrichtung,Bedieneinrichtung und Kochfeld
DE102013209847A1 (de) * 2013-05-27 2014-08-21 E.G.O. Elektro-Gerätebau GmbH Lichtleiteinrichtung, Bedieneinrichtung und Verfahren zur Beleuchtung einer Bedieneinrichtung
EP2809006A1 (fr) 2013-05-27 2014-12-03 E.G.O. Elektro-Gerätebau GmbH Élément de commande

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3703042A1 (fr) * 2019-03-01 2020-09-02 BSH Hausgeräte GmbH Moyen d'affichage doté d'une film de dispersion
EP4372728A1 (fr) * 2022-11-18 2024-05-22 Diehl AKO Stiftung & Co. KG Dispositif d'affichage et système d'interaction homme-machine pour appareil ménager et appareil ménager

Also Published As

Publication number Publication date
EP3232428B1 (fr) 2020-05-06
DE102016206174A1 (de) 2017-10-19
DE102016206174B4 (de) 2023-10-12
PL3232428T3 (pl) 2020-11-02
ES2807534T3 (es) 2021-02-23

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