CN218676011U - Touch display module and household appliance comprising same - Google Patents

Abstract

The utility model relates to a touch-control display module assembly (1) for on pressfitting panel (2) to domestic appliance, touch-control display module assembly (1) includes: a circuit board (3) provided with a light source (4); and the support (6) is arranged on the circuit board, the support is provided with a plurality of light guide holes (7) for the light source (4), wherein a gasket (9) made of an elastic material and a conductive medium (10) are arranged between the support (6) and the panel (2) around the single light guide hole (7), and the conductive medium (10) is electrically connected with the contacts (5) arranged on the circuit board (3) corresponding to the light guide holes (7). Furthermore, the utility model relates to an include the domestic appliance of touch-control display module assembly (1).

Description

Touch display module and household appliance comprising same

Technical Field

The utility model relates to a touch-control display module assembly and a domestic appliance including touch-control display module assembly.

Background

Nowadays, a touch display panel is popularly used on home appliances instead of a conventional mechanical manipulation indicating device, thereby enabling more intuitive human-computer interaction and effectively reducing physical wear. The integration of the touch display panel comprising the touch display module and the panel into the household appliance is also more favorable for realizing integrated and concise appearance design.

In order to realize the function of integrating the touch area and the display area in the touch display panel, a touch sensing film attached on the back side of the panel of the home appliance or integrated with the display film is generally used. However, the manufacturing cost and process requirements of the touch sensing film are high. In particular, additional material and time costs are required to machine and assemble the touch tail and touch terminals. In addition, in order to bond the touch sensitive film to the panel of the home appliance through the OCA optical adhesive, a special process such as screen bonding or vacuum adsorption stage bonding is required, and a defoaming process is also required to achieve full bonding without a gap if necessary. In addition, there are solutions using touch sensitive springs. However, such a touch sensing spring needs to be separately compressed and fixed between the panel and the circuit board, which undoubtedly increases the difficulty of assembling the touch display module on the panel.

Therefore, how to provide a touch display module with low cost and easy assembly is an urgent technical problem to be solved.

SUMMERY OF THE UTILITY MODEL

The task of the utility model lies in that, a touch-control display module assembly and a domestic appliance who has such touch-control display module assembly are provided, it can realize the touch-control display function with low costs under the condition that does not use touch-sensitive membrane or touch-sensitive spring to such touch-control display module assembly can assemble on domestic appliance's the panel portably.

The utility model discloses a first aspect relates to a touch-control display module assembly, touch-control display module assembly is used for the pressfitting to domestic appliance's panel on, touch-control display module assembly includes: a circuit board provided with a light source; and the support is arranged on the circuit board, the support is provided with a plurality of light guide holes for the light source, wherein the gasket made of elastic materials and the conductive medium are arranged between the support and the panel around a single light guide hole, and the conductive medium is electrically connected with the contacts arranged on the circuit board corresponding to the light guide holes.

First, the touch display module of the present invention is a functional module independent of the panel of the household electrical appliance. When the touch display module is assembled with the panel, the touch display module is only required to be pressed and fixed on the panel of the household appliance, and a complex process is not required. Therefore, the assembly process can be easily implemented at the home appliance manufacturer, thereby satisfying the supply demand personalized by the home appliance manufacturer.

The touch display module realizes the display function through the circuit board, the light source positioned on the circuit board and the bracket. The light guide opening in the holder can receive the light source on the circuit board therein and thus illuminate the area to be touched. In particular, it is also possible to provide on the panel of the household appliance, in correspondence with the light guide holes, display icons which are illuminated by means of the light source, so as to provide the user with an indication about touch more accurately.

The utility model discloses a still stipulate among the touch-control display module assembly and still be equipped with the liner of making by elastic material between support and panel, single leaded light hole setting is surrounded to the liner to do not influence touch-control display module assembly's display function. Since the panel of the household appliance generally has a certain rigidity, a gap may exist between the touch display module and the panel of the household appliance due to surface flatness, manufacturing tolerance, and/or deformation caused during fixing. The gap can be actively compensated by the gasket made of the elastic material, so that the touch display module can be tightly abutted and attached to the panel of the household appliance through simple pressing, and light leakage in the gap is prevented. Meanwhile, the liner made of the elastic material can be used for avoiding or reducing noise generated by mutual collision of rigid materials between the touch display module and the panel when the household appliance vibrates.

In addition, the utility model discloses an among the touch-control display module assembly, still include conductive medium between support and panel, conductive medium centers on single leaded light hole setting equally, and the contact electricity that corresponds to this leaded light hole and lay on conductive medium and the circuit board is connected. In this case, the electrically conductive medium extends in a two-dimensional plane and occupies a certain area. Thus, the conductive medium may be considered a plate of a capacitive sensor and can thus be used to capacitively detect a touch by a human body. When a finger of a user contacts a panel pressed by the touch display module, a coupling capacitor is formed between the finger and the conductive medium. The touch of a finger on the panel can be determined by detecting the capacitance change in the conductive medium, and then a corresponding touch operation is initiated. It goes without saying that a corresponding detection circuit can be provided on the circuit board. The utility model discloses in especially still stipulate, single leaded light hole is equipped with conductive medium and the contact corresponding to it to there is the one-to-one correspondence between leaded light hole, conductive medium and contact, make in single touch-control display area in the touch-control display module assembly can independently sense being close of human body and independently transmit corresponding sensing signal for the circuit board. Therefore, compared with the touch sensing film with the wire-shaped printed circuit distributed on the whole surface, particularly the touch sensing film using the projected capacitance touch technology, the manufacturing cost and the process difficulty are undoubtedly reduced, and a complex calculation circuit for positioning the contact area is not required to be arranged. Moreover, the touch sensitive film needs to use touch tails and touch terminals that collect all printed circuits, through the utility model discloses an independent sensing and independent scheme of passing that realizes at single light guide hole department from this has saved the material cost of circuit guide, has reduced the complexity of wiring and has consequently improved the reliability of circuit. Simultaneously, compare in needs compress tightly alone and fix the touch-sensitive spring between panel and circuit board, equally according to the utility model discloses a touch-control display module assembly has reduced the assembly degree of difficulty. It is thus clear that for the touch-sensitive membrane that is with high costs and technology complicacy and the touch-sensitive spring that exists the assembly degree of difficulty, the utility model discloses a touch-control display module assembly all shows the technical scheme who optimizes in the aspect of cost and assembly undoubtedly provided.

To sum up, the utility model discloses a touch-control display module assembly can be under the condition that does not use touch-sensitive membrane or touch-sensitive spring low-cost realization touch-control to show integration function and can assemble to on household electrical appliances's the panel portably.

According to an embodiment of the invention, the conductive medium and/or the gasket surrounds the light guiding hole along more than half of the hole edge of the light guiding hole, preferably at least along three quarters of the hole edge of the light guiding hole. This means that the conductive medium does not have to surround the entire aperture edge of the light guide aperture, but can surround only a large portion of the aperture edge of the light guide aperture without significantly affecting the sensitivity to touch. For example, for a square light guide hole, the conductive medium and/or the gasket may be disposed around only three edges of the square light guide hole, i.e., outside the light guide hole as in the character 'proba' shape. For a circular light guide hole, the light guide medium and/or the spacer may be distributed over only three quarters of the edge of the light guide hole. However, for the accuracy of capacitive touch detection, it is more preferable that the conductive medium surrounds the light guide hole along the entire hole edge of the light guide hole; and in order to more uniformly compensate for the gap between the panel and the bracket, the gasket preferably surrounds the light guide hole along the entire hole edge thereof. This means that the conductive medium and/or the gasket frame out of a square light guide hole or the conductive medium and/or the gasket surround a circular light guide hole like concentric circles. Without being limited to the above examples, the conductive medium and the gasket may each have any shape and size. For example, a square shaped conductive medium and/or the liner with a circular shape hollowed out therein may be used to surround a circular shaped light guide hole. At the same time, the conductive medium and the pad do not have to be congruent with each other. For example, a conductive medium in the shape of a "dogbone" is superimposed over a liner in the shape of a "\ 21274".

According to an embodiment of the invention, the conductive medium may be formed as a conductive layer separate from the gasket. In the present invention, the conductive medium and the gasket may be provided independently of each other. In particular, the conductive layer may be attached to the pad by suitable means, thereby facilitating subsequent assembly steps. Here, the suitable means may include adhesion, printing, coating, thermal bonding, lamination, and the like.

According to a preferred embodiment of the invention, the electrically conductive layer can be formed as a metal foil, which is glued to the lining. As the conductive layer, a metal foil is preferably used because the metal foil is inexpensive and easy to process, and ensures excellent conductive performance even under external force such as pressing, bending, or the like. In particular, stainless steel foil is considered for environmental corrosion protection and durability enhancement. In this case, the metal foil is advantageously also glued to the elastic material, so that the conductive medium and the spacer are expediently simultaneously shaped around the light-conducting opening by means of a process such as punching, cutting or the like. Without being limited thereto, it is also conceivable to simultaneously paste a metal foil on a possibly present display film. Thereby providing good positioning between the display film, the metal foil and the gasket.

According to a particularly preferred embodiment of the invention, an electrical connection strip which projects into the light guide opening can be provided for electrically connecting the conductive medium to the corresponding contact. Thus, the electrical connection can be realized by means of the light guide holes already present in the holder itself, without having to change the structure of the holder in order to realize the electrical connection. In particular, the electrical connection strip can be applied against the inner wall of the light guide opening, so that the influence on the display is reduced or even avoided.

According to a particularly preferred embodiment of the invention, the gasket and the electrical connection strip can be integrally formed from an elastic material to which a metal foil is glued. The electrical connection strips for connection to the circuit board are particularly advantageously co-molded at the same time as the pads are manufactured from an elastic material to which a metal foil is glued. Here, the metal foil may be first adhered to the elastic material, and then the gasket covered with the conductive medium and the electrical connection tape may be integrally formed by blanking or the like. Particularly preferably, the electrical connection strip is not disconnected from the gasket covered with the electrically conductive medium and is located in a void in the gasket corresponding to the light guiding hole. Furthermore, a gasket with such an electrical connection strip is also particularly suitable for carrying out automated assembly.

According to a particularly advantageous embodiment of the invention, the end of the electrical connection strip may have a bend so that the metal foil is electrically connected with the contact on the circuit board. In order to electrically connect the electrical connection strip to the contacts on the circuit board, the side of the electrical connection strip to which the metal foil is applied can be simply brought to face the contacts by bending, in particular bending backwards. In this way, the conductive medium for touch sensing, the spring structure for compensating for gaps and tolerances, and the connection for making electrical connections can be formed by only one composite structure without additional electrical connections. Moreover, such a functionally highly integrated composite structure is inexpensive and can be produced by only a few process steps and is also advantageous for the automated assembly of touch display modules.

According to a particularly advantageous embodiment of the invention, the support can have a recess for holding down the bend on its underside facing the circuit board. It is also particularly advantageous if corresponding recesses are provided on the underside of the circuit board in correspondence with the bends of the electrical connection strip and the contacts of the circuit board, said recesses pressing the bends against the circuit board so that the metal foil on the electrical connection strip reliably contacts the contacts. In this way, the metal foil and the contact can be reliably ensured to be electrically connected without welding or electrically bonding the metal foil and the contact on the electric connecting strip, and the bracket and the circuit board can be smoothly attached.

According to another embodiment of the invention, the conductive medium may be constituted as a conductive ink attached to the side of the gasket facing the panel. Alternatively to the above-described solution using metal foils, conductive ink may also be used as the conductive medium. Here, the conductive ink may include carbon paste, silver paste, nickel paste, or the like.

According to the utility model discloses an embodiment, touch-control display module assembly still includes the display film between support and panel, conductive medium can constitute for printing the electrically conductive printing ink on the one side that deviates from the panel of display film. The conductive ink may advantageously be printed on the side of the display film facing the support, facilitating electrical connection of the conductive ink to the circuit board. Here, a gasket made of an elastic material may be provided on either side of the display film. It is preferable that a gasket made of an elastic material is disposed between the display film and the supporter, thereby protecting the conductive ink from rubbing against the hard supporter by the elastic material of the gasket. Here, the conductive ink may also include carbon paste, silver paste, nickel paste, or the like.

According to an embodiment of the present invention, the conductive ink may additionally be distributed over the light guide hole. It is thus possible for the conductive ink to not only surround the light guide hole but also to cover the region corresponding to the light guide hole. In this way, the touch sensing area can be increased. This is particularly advantageous in the case of a large size of the light guide hole, because touch sensing is also possible at the center of the light guide hole. For this purpose, a translucent or transparent conductive ink, such as silver paste, is also advantageously used. It is also conceivable to additionally print a protective layer on the conductive ink.

According to an embodiment of the present invention, the conductive ink may be electrically connected to the contact on the circuit board through a spring. Since the spacers made of an elastic material may cause a change in the distance between the display film and the circuit board, it is advantageous to use springs having a stretchability as electrical connection members for connecting the conductive ink and the contacts, thereby ensuring good contact conduction even when the distance is changed. It goes without saying that the spring is made of an electrically conductive material, in particular a metal. Particularly preferably, the spring is a small spring, for example having a diameter which is much smaller than the size of the light guiding hole. It goes without saying that in order to connect the spring with the conductive ink, it may be necessary for the spacer to clear the spring and/or correspondingly extend the conductive ink to the location of the spring contact.

According to an embodiment of the present invention, the pad may be made of non-conductive foam. In the above solutions using metal foils or conductive inks, non-conductive foams, such as polyurethane foams, silicone foams, polyolefin foams, in particular polyethylene foams, can be used. Here, it is also preferable to use closed cell foam to avoid light leakage at the location of the gasket.

According to the utility model discloses an embodiment can use conductive medium and the integrated electrically conductive bubble of an organic whole of liner in touch-control display module assembly cotton. In addition to the non-conductive foam described above, a more integrated embodiment uses conductive foam. The conductive foam can be produced by wrapping a non-conductive foam with a conductive fiber cloth or a conductive tape, or by adding a conductive filler when extruding a foam. The conductive foam not only provides the resilient characteristic but also integrates a conductive medium.

According to the utility model discloses an embodiment, touch-control display module assembly still includes the display film between support and panel, electrically conductive bubble cotton can set up the display film towards the panel or on the one side that deviates from the panel. Since the conductive foam has good conductivity over its entire surface, it is also conceivable in particular to arrange the conductive foam on the side of the display film facing the panel, i.e. between the display film and the panel. Further, by sandwiching the conductive foam having elastic characteristics between the display film and the panel, a gap in a region corresponding to the light guide hole between the display film and the panel is additionally sealed. Thereby preventing dust or moisture from entering the gap to affect the display effect.

According to an embodiment of the invention, the conductive foam on the side of the display membrane facing the panel can be electrically connected with the contacts on the circuit board by means of a spring passing through the display membrane. In order to electrically connect the conductive foam located between the display film and the panel to the contacts on the circuit board, through holes can be provided in the display film for the springs, via which the springs can be supported between the underside of the conductive foam and the contacts.

According to one embodiment of the invention, assembly holes for the spring can be formed in the holder at the periphery of the light guide opening. In the case of solutions using conductive inks or using conductive foam, the spring for the electrical connection is provided with a mounting opening in order to be held in a stationary manner in the holder. The aperture of the assembly hole is slightly larger than the diameter of the spring. The assembly aperture may be proximate to, spaced from, or in communication with the perimeter of the light guide aperture, for example, as desired.

The second aspect of the utility model relates to an include the utility model discloses a domestic appliance of touch-control display module assembly, a serial communication port, touch-control display module assembly is in the inside pressfitting of domestic appliance on domestic appliance's the panel.

According to the utility model discloses an implementation scheme, domestic appliance is air conditioner, lampblack absorber, kitchen range, water heater, refrigerator, oven, dish washer, food processor, washing machine, dryer, stereo set, TV, intelligent tap or intelligent closestool etc..

Other features of the invention will be apparent from the accompanying drawings and from the detailed description. All the features and feature combinations mentioned above in the description and also features and feature combinations mentioned below in the description and/or shown in the figures individually can be used not only in the respectively given combination but also in other combinations or in isolation.

Drawings

Fig. 1 shows an exploded view of a touch display module according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of the touch display module shown in fig. 1;

fig. 3 is an exploded view of a touch display module according to a preferred embodiment of the present invention;

FIG. 4 is a cross-sectional view of the touch display module shown in FIG. 3;

fig. 5 is an exploded view of a touch display module according to another embodiment of the present invention;

fig. 6 is an exploded view of a touch display module according to another preferred embodiment of the present invention;

fig. 7 shows a cross-sectional view of the touch display module of fig. 6 in an assembled state; and

fig. 8 is an exploded view of a touch display module according to another preferred embodiment of the present invention.

Detailed Description

It is first pointed out that in different embodiments substantially the same components are provided with the same reference signs or the same component names. In the drawings, various components may not be shown in proportion and/or in an enlarged and/or reduced manner in order to facilitate understanding of the structure of the touch display module.

Fig. 1 shows an exploded view of a touch display module according to an embodiment of the present invention. Additionally shown therein is a panel 2 to be pressed together when the touch-sensitive display module 1 is assembled into a household appliance.

As shown in fig. 1, the touch display module 1 includes: a circuit board 3 provided with a light source 4; and a support 6 arranged on the circuit board, wherein the support is provided with a plurality of light guide holes 7 for the light source 4. The utility model discloses especially stipulate, center on between support 6 and panel 2 be provided with the liner 9 of making by elastic material and set the conducting medium 10 for this leaded light hole with leaded light hole 7, conducting medium 10 is connected with the contact 5 electricity that lays corresponding to this leaded light hole 7 on the circuit board 3.

The touch display module 1 realizes a display function through the circuit board 3, the light source 4 positioned thereon and the bracket 6 as a conventional display unit. The light guide opening 7 of the holder 6 can receive the light source 4 on the circuit board 3 therein and thereby illuminate the display, in particular a display icon (not shown), on the panel 2 between the holder 6 and the panel 2 or on a display film 8 shown in the further figures.

In the touch display module 1, a gasket 9 made of an elastic material is further arranged between the bracket 6 and the panel 2. As can be seen in fig. 1, a gasket 9 made of elastic material is present between the bracket 6 and the panel 2 around said light guide hole 7. Here, the elastic pad 9 can compensate for a gap between the touch display module 1 and the panel 2 due to surface flatness, manufacturing tolerance, and/or deformation, so that the touch display module 1 can be closely abutted and attached to the panel 2 when the touch display module 1 is assembled to the panel 2. In addition, the liner made of the elastic material can also play a role in shock absorption and noise reduction, and noise generated by mutual collision of rigid materials of the touch display module 1 and the panel 2 is avoided.

In addition, a conductive medium 10 is also arranged between the support 6 and the panel 2 around the light guide hole 7, and the conductive medium 10 is electrically connected with the contact 5 arranged on the circuit board 3 corresponding to the light guide hole 7. For clarity reasons, the electrical connections that make the electrical connection are not shown. Conventional connecting means such as wires, sheet conductors, etc. are conceivable for this purpose. The conductive medium 10 can be considered as a plate of a capacitive sensor and can thus be used to capacitively detect touch sensing. When a finger of a user touches the panel 2 of the household appliance pressed by the touch display module 1, a coupling capacitor is formed between the finger and the conductive medium 10. The touch of a finger to the panel can be determined by detecting the capacitance change in the conductive medium 10, and then the corresponding touch operation is realized. It goes without saying that a corresponding detection circuit can be provided on the circuit board 3.

The utility model discloses in especially still stipulate, single leaded light hole 7 is equipped with corresponding to its conducting medium 10 and contact 5 to there is the one-to-one correspondence between leaded light hole 7, conducting medium 10 and contact 5, make in single touch-control display area in touch-control display module assembly 1 can independently sense approaching of human body and independently transmit corresponding sensing signal for circuit board 3. Thus, manufacturing costs and process difficulties can be reduced relative to touch sensitive films and no complex computational circuitry for locating the contact area has to be provided. Through the utility model discloses an independent sensing and the scheme of independent transmission of realizing in light guiding hole 7 department have saved the complexity of circuit guide more and have consequently improved the reliability of circuit. Meanwhile, compared with a touch sensing spring which needs to be separately pressed and fixed between the panel and the circuit board, the assembly difficulty is also reduced. Therefore, the utility model discloses a touch-control display module assembly 1 can be under the condition that does not use touch-sensitive membrane or touch-sensitive spring low-cost realization touch-control display function and can assemble to domestic appliance's panel portably on, provide undoubtedly all showing the technical scheme who optimizes in the aspect of cost and assembly.

Here, the conductive medium 10 and the spacer 9 surround the single light guide hole 7, which means that the conductive medium 10 corresponds to the shape of the light guide hole 7 to be hollowed out from the spacer 9, that is, the region of the conductive medium 10 that is set aside for display is set around the light guide hole 7.

In order to ensure touch sensitivity, the conductive medium 10 and/or the spacer 9 surround the light guide hole 7 along more than half of the hole edge of the light guide hole 7, and particularly, the conductive medium 10 and/or the spacer 9 surround the light guide hole 7 at least along three quarters of the hole edge of the light guide hole 7. As in the case shown on the left in fig. 1, for a square light guide, the conductive medium can be arranged on the periphery of only three edges of the square light guide, i.e. outside the light guide 7 as in the shape of a letter "21274"; and the gasket 9 is framed outside the square light guide hole in a shape like a Chinese character 'kou'. As shown on the right side of fig. 1, the conductive medium 10 surrounds the circular light guide hole as concentric circles, while the gasket is distributed over only three quarters of the edge of the light guide hole. It should be understood that the conductive medium 10 and the pad 9 may have any shape and size without being limited to the above example, and the conductive medium 10 and the pad 9 are not necessarily identical to each other.

Fig. 2 is a cross-sectional view of the touch display module shown in fig. 1. Here, too, the panel 2 of the touch-sensitive display module 1 is shown to be pressed together when it is installed in the household appliance. The components of the touch display module 1 shown in fig. 2 are attached together in the order of the conductive medium 10, the gasket 9, the bracket 6 and the circuit board 3. Fig. 2 shows more clearly than fig. 1 that the gasket 9 made of an elastic material and the conductive medium 10 surround the light guiding hole 7 of the support 6 so as not to obstruct the light from the light guiding hole 7 therebelow from irradiating the panel 2. Furthermore, the light guide hole 7 has a tapered configuration from top to bottom for better condensing the light emitted by the light source 4.

According to one embodiment, the conductive medium 10 may be configured as a conductive layer separate from the pad. That is to say the conductive medium 10 and the spacer 9 may be provided independently of each other. In particular, the conductive medium 10 can be attached to the gasket 9 and/or the display film 8 shown in the other figures. This means that the conductive medium 10 is constructed as a separate element from the spacer 9 and the display film 8 and may be attached to the spacer 9 and/or the display film 8 by means of adhesion, printing, coating, thermal connection, lamination or the like.

Fig. 3 is an exploded view of a touch display module according to a preferred embodiment of the present invention. Fig. 3 additionally shows that the touch display module 1 further includes a display film 8 between the bracket 6 and the panel 2. The conductive medium 10, which is designed as a conductive layer in the preferred embodiment, is a metal foil 10a, and the metal foil 10a is glued to the spacer 9 made of an elastic material. By sticking the metal foil 10a together with the elastic material constituting the spacer 9, then, the configuration surrounding the light guide hole 7 can be simultaneously made to the conductive medium 10 and the spacer 9 conveniently by processing such as blanking, cutting, and the like. Furthermore, a backing adhesive 11 can be provided on the side of the lining 9 facing away from the display film 8 in order to fix it to the carrier 6.

Fig. 3 also shows, by way of example, an electrical connection strip 12 for electrically connecting the electrically conductive medium 10 to the corresponding contact 5.

Particularly preferably, the electrical connection strip 12 may be integrally formed by using an elastic material to which the metal foil 10a is adhered. The electrical connection strips 12 can conveniently electrically connect the conductive medium 10, i.e. the metal foil 10a, to the contacts 5 of the circuit board 3. The electrical connection strip 12 may extend into the light guide hole 7 surrounded by the gasket 9, in particular be glued to the inner wall of the light guide hole 7.

Particularly advantageously, the tail end 13 of the electrical connection strip 12 has a bend 14, in particular a backward bend as shown, to electrically connect the metal foil 10a on the surface with the contact 5 on the circuit board 3.

In order to make electrical connection of the metal foil 10a to the contact 5 easier, the bottom of the support 6 facing the printed circuit board 3 has a recess 15 for pressing the bend 14. The notches 15 press the bends 14 against the circuit board 3 so that the metal foil 10a on the electrical connection strip 12 is reliably in contact with the contacts 5. In this way, the electrical connection of the metal foil 10a to the contact 5 is reliably ensured without soldering or electrically conductive adhesive bonding or the like being carried out between the metal foil on the electrical connection strip 12 and the contact 5, and a flat contact between the carrier 6 and the circuit board 3 is also ensured.

Fig. 4 is a cross-sectional view of the touch display module shown in fig. 3. The positional relationship of the electrical connection belt 12 with other components is more clearly shown. As shown in fig. 4, the electrical connection strip 12 may protrude inwardly from the hollowed rectangular shape surrounding the light guide hole 7, follow the inner wall of the light guide hole 7 downwardly, and finally have its tail end 13 bent back over the circuit board 3 to take a fishhook shape as a whole. The lower surface at the backward bend 14 is a metal foil 10a, which metal foil 10a is in contact with the contact 5, which is shown in bold. And the notch 15 (see fig. 3) of the holder 6 presses the backward bend 14 against the contact 5, whereby soldering, conductive gluing or the like can be dispensed with.

Fig. 5 is an exploded view of a touch display module according to another embodiment of the present invention. In the figure, it is shown that a plurality of touch display areas are provided in one touch display module 1. As shown in fig. 5, a plurality of light guide holes of different sizes and different shapes may be provided in the holder 6. Accordingly, the spacer 9 and the conductive medium 10 surrounding the light guide hole 7 may also vary depending on the size of the shape of the light guide hole. The illustration of the light source 4 and the contacts 5 on the circuit board is omitted in fig. 5, but it is clearly understood that one contact 5 and at least one light source 4 should be provided for a single light guiding hole 7.

Fig. 5 also shows that the touch display module 1 also includes a display film 8 between the bracket 6 and the panel 2. In this embodiment, the conductive medium 10 is a conductive ink 10b printed on the side of the display film 8 facing away from the panel 2. A gasket 9 made of an elastic material is provided between the display film 8 and the support 6, whereby the conductive ink 10b is protected from rubbing against the hard support 6 by the elastic material of the gasket 9. Here, the conductive medium 10 includes, for example, carbon paste, silver paste, nickel paste, or the like. Although not illustrated, the display film 8 in the present embodiment may also be omitted, i.e. the conductive medium 10 may be attached on the side of the gasket 9 facing the panel 2, e.g. printed on the inner side of the panel 2 in contact with the gasket 9.

As shown in fig. 5, the conductive ink 10b is preferably additionally distributed over the light guide hole 7. That is, the conductive ink 10b is coated or printed not only around the light guide holes 7 but also on the area of the display film 8 corresponding to the light guide holes 7. The large-area conductive ink 10b shown in fig. 5 can increase the touch sensing area, and thus touch sensing can be performed even at the center of the light guide hole when the light guide hole has a large size. For this purpose, a translucent or transparent conductive ink 10b, such as a silver paste, is also advantageously used. It is also conceivable to additionally print a protective layer on the conductive ink 10b.

As also shown in fig. 5, the conductive ink 10b is electrically connected to the contacts 5 on the circuit board 3 by springs 16. By using the spring 16 with scalability as an electrical connection member for connecting the conductive ink 10b and the contact 5, good contact conduction is ensured even when the distance between the display film 8 and the circuit board 3 changes. Here, the spring 16 is preferably a small spring, i.e. the spring 16 has a diameter which is much smaller than the size of the light guiding hole 7.

In order to accommodate the spring 16 in a stationary manner in the holder 6, a mounting opening 17 for the spring 16 is formed on the circumference of the light guide opening 7. The diameter of the assembly hole 17 is slightly larger than the diameter of the spring 16. As shown in fig. 5, the fitting hole 17 may be, for example, adjacent to the periphery of the light guide hole 7 or may be spaced apart from the periphery of the light guide hole 7 as needed. It goes without saying that in order to connect the spring 16 with the conductive ink 10b, it may be necessary for the pad 9 to be moved away from the spring 16 and/or for the conductive ink 10b to be correspondingly extended to the position where the spring 16 contacts.

In the embodiments shown in fig. 1 to 5, the pad 9 may be made of non-conductive foam.

Fig. 6 is an exploded view of a touch display module according to another preferred embodiment of the present invention. In fig. 6, a conductive foam 9' is used, which integrates the conductive medium 10 with the pad 9. The conductive foam 9' can be produced by wrapping a conductive fiber cloth or a conductive tape outside the non-conductive foam or by adding a conductive filler when the foam is extruded.

As shown in fig. 6, the conductive foam 9' is located on the side of the display film 8 facing the panel 2. The gap between the display film 8 and the panel 2 in the region corresponding to the light guide hole 7 is additionally sealed by such an arrangement. Thereby preventing dust or moisture from entering the gap to affect the display effect. Without being limited thereto, the conductive foam 9' may also be located on the side of the display film 8 facing away from the panel 2.

In the embodiment shown in fig. 6, the spring 16 can also be used to make an electrical connection between the conductive foam 9' and the corresponding contact 5 on the circuit board 3. For this purpose, the conductive foam 9' on the side of the display film 8 facing the panel 2 is electrically connected to the contacts 5 on the circuit board 3 by means of springs 16 passing through the display film 8. In order to allow the spring 16 to pass through the display film 8, a through hole 18 is opened in the display film 8.

Fig. 7 shows a cross-sectional view of the touch display module shown in fig. 6 in an assembled state. It can be seen that the conductive foam 9' which is still shaped around the light guide hole 7 is located on the side of the display film 8 facing the panel 2. In order to electrically connect the conductive foam 9 'arranged in this way to the contacts 5 on the circuit board 3, springs 16 are used which are supported between the contacts 5 and the conductive foam 9'. The spring 16 is received in a mounting hole 17 in the bracket 6, the mounting hole 17 being located immediately adjacent the periphery of the light guide hole 7. The spring passes through a through-hole 18 in the display membrane 8 in order to contact the conductive foam 9' located on the upper side of the display membrane 8.

Fig. 8 is an exploded view of a touch display module according to another preferred embodiment of the present invention. The touch display module 1 in the figure is similar to the technical solution shown in fig. 5. However, the difference is that in fig. 8 a one-piece gasket 9 "is used. The integral gasket 9 "covers the entire surface of the support 6 and is configured with openings corresponding to the individual light guide holes 7 in the support and the mounting holes 17 for the springs 16 so that the gasket 9" surrounds all of the light guide holes 7 so that light from the light guide holes 7 can pass through the integral gasket 9 "to impinge on the display film 8. And the springs 16 are all able to contact the conductive ink 10b printed on the side of the display film 8 facing away from the panel 2 through the integral gasket 9". The integrated pad 9 "in fig. 8 is made of non-conductive foam so that no signal interference occurs between the individual conductive inks 10b. By using such an integrated gasket 9", substantially the entire surface of the touch display module 1 is tightly attached to the panel 2 of the electric home appliance, thereby reliably avoiding a gap therebetween during the assembly process. Of course, without limitation, other embodiments of the present invention may also employ a similar concept of constructing a single gasket and/or conductive medium corresponding to a plurality of corresponding single light guide holes through a unitary gasket and/or conductive medium.

The present invention is not limited to the embodiments shown but includes or extends to all technical equivalents that may fall within the scope and spirit of the appended claims. The positional references selected in the description, such as, for example, upper, lower, left, right, etc., refer to the direct description and to the illustrated drawings and can be transferred to a new position in the sense of a change in position.

The features disclosed in the present document can be essential for the implementation of the embodiments in terms of different embodiments and can be implemented both individually and in any combination.

Although the present invention has been disclosed in the preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can use the above-mentioned method and technical contents to make possible changes and modifications to the technical solution of the present invention without departing from the spirit and scope of the present invention, therefore, any simple modification, equivalent changes and modifications made to the above embodiments by the technical substance of the present invention all belong to the protection scope of the technical solution of the present invention.

Claims (19)

1. Touch-control display module assembly (1), touch-control display module assembly (1) is used for the pressfitting to domestic appliance on panel (2), touch-control display module assembly (1) includes:

a circuit board (3) provided with a light source (4); and

a bracket (6) arranged on the circuit board, the bracket is provided with a plurality of light guide holes (7) for the light source (4),

it is characterized in that the preparation method is characterized in that,

a spacer (9) made of an elastic material and a conductive medium (10) are arranged between the carrier (6) and the panel (2) around the individual light-conducting openings (7), the conductive medium (10) being electrically connected to contacts (5) of the circuit board (3) which are arranged in correspondence with the light-conducting openings (7).

2. Touch display module (1) according to claim 1, characterized in that the conductive medium (10) and/or the spacer (9) surround the light guide hole along more than half of its hole edge.

3. Touch display module (1) according to claim 2, characterized in that the conductive medium (10) is configured as a conductive layer separate from the spacer (9).

4. The touch display module (1) according to claim 3, wherein the conductive layer is formed as a metal foil (10 a) which is glued to the spacer (9).

5. Touch display module (1) according to claim 4, characterized in that for electrically connecting the conductive medium (10) with the corresponding contact (5) there is provided an electrical connection strip (12) which extends into the light guide hole (7).

6. Touch display module (1) according to claim 5, characterized in that the pads (9) and the electrical connection strips (12) are integrally formed by an elastic material to which a metal foil (10 a) is glued.

7. Touch display module (1) according to claim 6, characterized in that the tail end (13) of the electrical connection strip (12) has a bend (14) to electrically connect the metal foil (10 a) with the contact (5) on the circuit board (3).

8. Touch display module (1) according to claim 7, characterized in that the bottom side of the support (6) facing the circuit board (3) has a recess (15) for pressing the bend (14).

9. Touch display module (1) according to one of claims 1 to 3, characterized in that the conductive medium (10) is configured as a conductive ink (10 b) which is attached to the side of the pad (9) facing the panel (2).

10. Touch display module (1) according to one of claims 1 to 3, characterised in that the touch display module (1) further comprises a display film (8) between the support (6) and the panel (2), the conductive medium being constituted as conductive ink (10 b) printed on the side of the display film (8) facing away from the panel (2).

11. The touch display module (1) according to claim 10, wherein the conductive ink (10 b) is additionally distributed over the light guide hole (7).

12. The touch display module (1) according to claim 11, wherein the conductive ink (10 b) is electrically connected to the contacts (5) on the circuit board (3) through springs (16).

13. Touch display module (1) according to one of claims 1 to 8, characterised in that the spacers (9) are made of non-conductive foam.

14. Touch display module (1) according to claim 1 or 2, characterized in that in the touch display module (1) conductive foam (9') is used which is integrated with the gasket using a conductive medium.

15. The touch display module (1) according to claim 14, wherein the touch display module (1) further comprises a display film (8) between the stand (6) and the panel (2), and the conductive foam (9') is disposed on a side of the display film (8) facing the panel (2) or facing away from the panel (2).

16. Touch display module (1) according to claim 15, characterized in that the conductive foam (9') on the side of the display film (8) facing the panel (2) is electrically connected to the contacts (5) on the circuit board (3) by means of springs (16) passing through the display film (8).

17. The touch display module (1) according to claim 12 or 16, wherein an assembly opening (17) for the spring (16) is formed in the holder (6) at the periphery of the light guide opening (7).

18. Household appliance comprising a touch display module (1) according to one of claims 1 to 17, characterized in that the touch display module (1) is pressed on a panel (2) of the household appliance inside the household appliance.

19. The household appliance of claim 18, wherein the household appliance is an air conditioner, a range hood, a stove, a water heater, a refrigerator, an oven, a dishwasher, a food processor, a washing machine, a clothes dryer, a stereo, a television, an intelligent faucet, or an intelligent toilet.

Images