Touch module and display module

Abstract

The utility model discloses a touch module and a display module. The touch module comprises a touch sensor and a flexible circuit board assembly connected with the touch sensor. The flexible circuit board assembly comprises a main body part and a grounding support connected with the main body part. The grounding support is provided with a substrate, a first elastic arm and a second elastic arm, wherein the first elastic arm and the second elastic arm are arranged on the substrate, and the first elastic arm and the second elastic arm extend along the two sides of the plane where the substrate is located respectively. Therefore, by adopting the touch module and the display module comprising the touch module, the assembly structure of the module is simpler, and the module is easy to disassemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of household appliances, specifically relates to a touch module and display module. BACKGROUND

[0002] The technology of integrating touch integrated circuits on flexible printed circuit boards (FPC) is widely used in the consumer electronics field. In order to increase the reliability of electromagnetic compatibility, grounding is usually required.

[0003] In the field of household appliances, the display module includes a touch module, and the common grounding method of the touch module is to paste the flexible printed circuit board to the copper area of the display screen back plate or printed circuit board through conductive double-sided adhesive tape. This method has some risks. For example, jigs are usually used to press and paste during assembly, and the jigs need to avoid electronic devices, so the assembly is relatively complex. Secondly, in order to ensure the reliability of the adhesive strength within the service life of the product, conductive double-sided adhesive tape with strong adhesion is usually selected. Therefore, when the display screen is damaged and needs to be reworked and replaced in the production line or after-sales, the flexible printed circuit board needs to be removed from the display screen first. During the disassembly process, the metal reinforcing plate may be deformed under stress; at the same time, during the disassembly process, the components may also be damaged, which may lead to the scrapping of the entire touch module. Furthermore, after the rework is completed, the flexible printed circuit board is pasted back to the back of the display screen, and the metal reinforcing plate may be deformed, which may reduce the grounding area and affect the grounding performance.

[0004] In summary, through the pasting grounding method, there are risks of complex assembly, difficult disassembly, and high rework scrapping rate. UTILITY MODEL CONTENTS

[0005] The utility model at least provides a touch module and display module comprising a grounding bracket, so that the assembly structure of the display module is simpler and easier to disassemble.

[0006] The utility model discloses a touch module, including touch sensor and with touch sensor connection's flexible circuit board subassembly, the flexible circuit board subassembly includes main part and with main part connection's grounding bracket, the grounding bracket constructs with the substrate and sets up at the first elastic arm and second elastic arm of substrate, and the first elastic arm and second elastic arm respectively along the two sides of the plane of substrate extension.

[0007] By constructing a grounding support including an upper cantilever and a lower cantilever, the touch module including the grounding support can be used for abutting against the circuit board at the upper part of the grounding support and the support and the display assembly at the lower part respectively after the touch module is assembled into the display module. This connection mode makes the touch module more easily assembled and disassembled. Specifically, when the display module is assembled, the flexible circuit board assembly constructed with the grounding support is arranged between the circuit board and the support, and the grounding support abuts against the display assembly and the circuit board respectively. When the display module is disassembled later, the circuit board is only dismounted from the support, and then the flexible circuit board assembly and the display assembly can be easily separated, so that damage to the flexible circuit board assembly and related devices is avoided, and the scrappage rate of the module is reduced.

[0008] In a possible embodiment, the first elastic arm and the second elastic arm are arranged on two adjacent sides of the substrate respectively. Preferably, the second elastic arm includes two and is arranged on the same side of the plane of the substrate and oppositely. The first elastic arm abuts against the display assembly downward, and the two second elastic arms abut against the circuit board downward, so that the stability and grounding performance of the structure are ensured.

[0009] In a possible embodiment, the first elastic arm is constructed with a hollow part, so that the first elastic arm can be better bent when subjected to external force, and the flexibility and adaptability thereof are increased.

[0010] In a possible embodiment, the first elastic arm is constructed with a first connecting part and a second connecting part connected with the first connecting part at an angle.

[0011] In a possible embodiment, the first elastic arm is further constructed with an intermediate connecting part connecting the first connecting part and the second connecting part and connected with each other at an angle.

[0012] In a possible embodiment, the second elastic arm is constructed with a third connecting part and a fourth connecting part connected with the third connecting part.

[0013] The utility model discloses still disclose a display module, including the circuit board, support and display assembly of laminated arrangement, still include aforementioned touch module, the touch module sets up in the one side of display module and deviates from support, wherein the flexible circuit board assembly extends and sets up in the one side of support and deviates from circuit board, first elastic arm passes through the avoidance of support Part, and with the conductive backboard of display assembly abuts against, second elastic arm and circuit board abut.

[0014] The display module is simple in assembly and easy to disassemble while realizing grounding. Specifically, the grounding assembly is stably arranged between the circuit board and the support through cooperation of the first elastic arm and the second elastic arm, and the grounding of the flexible circuit board assembly is ensured. Further, when the display module is assembled, the flexible circuit board assembly with the grounding support is arranged between the circuit board and the support, and the grounding support abuts against the display assembly through the avoiding portion of the support. When the display module is disassembled later, the circuit board is only needed to be disassembled from the support, and then the flexible circuit board assembly and the display assembly can be easily separated, so that damage to the flexible circuit board assembly and related devices is avoided, and the scrappage rate of the module is reduced.

[0015] In a possible embodiment, the circuit board is configured with a grounding portion, and the second elastic arm abuts against the grounding portion. The grounding of the flexible circuit board assembly and the grounding of the circuit board are realized through the first elastic arm and the second elastic arm respectively, and a grounding structure specially arranged on the circuit board is omitted, so that the structure of the display module is simplified.

[0016] In a possible embodiment, the support is configured with a supporting portion for supporting the second elastic arm. The second elastic arm is supported by the supporting portion, so that the second elastic arm more stably abuts against the circuit board.

[0017] In a possible embodiment, the support is configured with a buckle portion, and the end portion of the first elastic arm is buckled with the buckle portion. The first elastic arm is fixed by the buckle portion, and the abutment and grounding of the first elastic arm and the display assembly are strengthened. Further, when the display module is assembled, the first elastic arm is buckled with the buckle portion first, the grounding support is fixed, and then the circuit board is press-fitted on the grounding support. The buckle portion makes the assembly of the display module more convenient.

[0018] In a possible embodiment, the support and the flexible circuit board assembly are respectively configured with positioning columns and positioning holes which cooperate with each other. Preferably, the positioning columns and the positioning holes are respectively arranged diagonally. Through the positioning structure, the assembly of the flexible circuit board assembly is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic view of a display module in an embodiment of the present application;

[0020] Figure 2 is an exploded structural schematic view of a display module in an embodiment of the present application;

[0021] Figure 3a is a structural schematic view of a display module in an embodiment of the present application Figure 1 is a structural schematic view of an A-A section in the above figure;

[0022] Figure 3b is a local enlarged schematic view in figure 3 in an embodiment of the present application;

[0023] Figure 4 is the exploded structural schematic view of the flexible circuit board assembly in the embodiment of the utility model Figure 1 is the structural schematic view of B-B section in the embodiment of the utility model

[0024] Figure 5 is the exploded structural schematic view of the flexible circuit board assembly in the embodiment of the utility model

[0025] Figure 6a is the three-dimensional structural schematic view of the grounding support in the embodiment of the utility model

[0026] Figure 6b is the side structural schematic view of the grounding support in the embodiment of the utility model

[0027] Figure 7 is the structural schematic view of the touch module, display assembly and support after assembly in the embodiment of the utility model

[0028] Figure 8 is the assembly method schematic view of the display module in the embodiment of the utility model DETAILED DESCRIPTION

[0029] The embodiment of the utility model provides a kind of touch module and display module comprising novel grounding structure, the elastic arm of grounding structure is contacted with the conductive backplate of display assembly, simultaneously, grounding structure is fixed by circuit board and display assembly, the grounding of flexible circuit board assembly is realized, assembly mode is simpler, disassembly is more convenient, and module rework scrap rate is reduced.

[0030] Figure 1 And 2 It is shown that display module 1 and its exploded structural schematic view are shown in the drawings.The display module 1 includes circuit board 10, support 20, display assembly 30 and touch sensor 40 arranged in layers as shown in Figure 1 And 2 Circuit board 10 can be electrically connected with display assembly 30, for providing power supply and control signal etc.for display assembly 30;Support 20 can support circuit board 10 and display assembly 30;Touch sensor 40 can be arranged at the side of display content of display assembly 30.

[0031] Support structure can be arranged on support 20 to support or fix circuit board.Referring to Figure 2 Support 20 includes the first face 21 facing circuit board 10 and the first support portion 201 arranged on the first face 21, for supporting circuit board 10.Further, the first support portion 201 can be provided with buckle, so that the first support portion 201 can support and fix circuit board 10 simultaneously.

[0032] The support 20 further comprises a second support portion 202 arranged on a side of the support 20, for supporting the display assembly 30. The second support portion 202 can be in the form of a buckle.

[0033] It can be understood that, in order to better support the circuit board and the display assembly, a plurality of first support portions and second support portions can be arranged as required.

[0034] The display assembly 30 is configured to display content, and can be a TFT display screen or other type of display screen.

[0035] The display module 1 further comprises a flexible circuit board assembly 50. The touch sensor 40 and the flexible circuit board assembly 50 connected to the touch sensor 40 constitute a touch module, for realizing the touch detection function of the display module 1.

[0036] The touch sensor 40 is configured to detect a touch signal of a user, for realizing human-computer interaction. The touch sensor 40 can be of a resistive type, a capacitive type or other type. The touch sensor 40 is electrically connected to the circuit board 10 through the flexible circuit board assembly 50. Referring to Figure 1 and Figure 2 , the flexible circuit board assembly 50 can be arranged on one side of the touch sensor 40 and can extend between the circuit board 10 and the support 20.

[0037] Referring to Figure 5 , the flexible circuit board assembly 50 comprises a main body portion 51. The main body portion 51 is provided with a touch integrated circuit. The touch integrated circuit is a chip responsible for processing touch signals, and it can detect touch positions, gestures and other inputs. This type of chip usually contains an analog front end, a digital signal processor, a memory and other support circuits.

[0038] The main body portion 51 is usually a flexible printed circuit board (FPC). The FPC is a flexible circuit board that can be bent or folded. The FPC can be composed of a flexible substrate (such as polyimide), conductive traces (usually copper) and a cover layer.

[0039] The touch integrated circuit is directly soldered on the FPC, or connected through technologies such as ball grid array, chip scale package, etc. The pins of the touch integrated circuit are connected to the traces on the FPC, and these traces transmit signals to other circuits or devices.

[0040] One end of the main body portion 51 is connected to the touch sensor 40, usually through pressure-sensitive adhesive or hot-pressing connection. The electrodes of the touch sensor 40 are connected to the corresponding traces on the main body portion 51, for transmitting touch signals.

[0041] The flexible circuit board assembly 50 is connected to the circuit board 10 by a connector 52. Specifically, the other end of the main body 51 is connected to the circuit board 10 by a zero insertion force connector, an FPC connector, or other type of connector. This allows the touch sensor 40 to communicate with other components. Referring to Figure 1 and 2 , the connector 52 of the flexible circuit board assembly 50 can be bent and connected to the circuit board 10 through an aperture of the circuit board 10.

[0042] To meet the requirements of circuit performance and electromagnetic compatibility, the flexible circuit board assembly 50 needs to be designed for grounding. In the embodiment of the present application, the flexible circuit board assembly 50 further comprises a grounding bracket 53 connected to the main body 51. The grounding bracket 53 can be attached to the main body 51 by a conductive double-sided adhesive 54 and a metal reinforcing plate 55, as shown in Figure 5 .

[0043] The grounding bracket 53 can be grounded by contacting the conductive back plate of the display assembly 30. Specifically, referring to FIG. 3 and Figure 7 , the grounding bracket 53 is disposed between the circuit board 10 and the bracket 20; the grounding bracket 53 is configured with a first elastic arm 531, which can pass through the avoiding portion 22 of the bracket 20 and abut against the conductive back plate of the display assembly 30, thereby achieving grounding of the flexible circuit board assembly 50 through electrical connection between the grounding bracket 53 and the conductive back plate.

[0044] The grounding bracket 53 can also be configured with a second elastic arm 532, which can abut against the circuit board 10. Referring to Figure 4 , the grounding bracket 53 is disposed between the circuit board 10 and the bracket 20, and the pressure of the circuit board 10 and the bracket 20 on the first elastic arm 531 and the second elastic arm 532 respectively ensures the grounding of the flexible circuit board assembly 50.

[0045] The circuit board 10 can also be configured with a grounding portion, and the second elastic arm 532 can abut against the grounding portion. For example, the grounding portion is an exposed copper area on the circuit board, and the second elastic arm 532 can abut against the exposed copper area. In this way, the first elastic arm 531 and the second elastic arm 532 of the grounding bracket 53 can simultaneously achieve grounding of the flexible circuit board assembly 50 and the circuit board 10. In addition, by using the grounding bracket, it is not necessary to separately provide a spring or other grounding structure on the circuit board.

[0046] Figure 6a and Figure 6bAn embodiment of the grounding bracket 53 is shown. The grounding bracket 53 can be configured with a base plate 530, a first elastic arm 531 and a second elastic arm 532, and the first elastic arm 531 and the second elastic arm 532 respectively extend along two sides of the plane where the base plate 530 is located, that is, the first elastic arm 531 and the second elastic arm 532 are respectively located on two sides of the plane where the base plate 530 is located. In this way, in the assembled display module, the first elastic arm 531 can abut against the conductive back plate of the display assembly 30, and the second elastic arm 532 can abut against the circuit board 10, for example Figure 3a 、 3b and 4 to ensure the grounding of the flexible circuit board assembly 50.

[0047] The first elastic arm 531 and the second elastic arm 532 can be respectively arranged on two adjacent sides of the base plate 530. Further, the second elastic arm 532 can include two and be arranged on the same side of the plane where the base plate 530 is located and opposite to each other, so that the second elastic arm can support the circuit board 10 at different positions. Referring to FIG. 6, the base plate 530 is roughly square, the first elastic arm and the two second elastic arms are arranged on three sides of the base plate, and the first elastic arm is located between the two second elastic arms.

[0048] The first elastic arm 531 can be configured with a hollow portion, so that when subjected to external force, the first elastic arm 531 can better bend, increasing its flexibility and adaptability.

[0049] In an embodiment, the first elastic arm 531 can be configured with a connecting portion connected to each other, for example, a first connecting portion and a second connecting portion connected to the first connecting portion, and connected to each other at an angle. The connection of the two connecting portions can abut against the conductive back plate of the display assembly, or the second connecting portion with a free end abuts against the conductive back plate of the display assembly.

[0050] Figure 6a and Figure 6b An embodiment of the first elastic arm configured with three connecting portions is shown. The first elastic arm 531 is configured with a first connecting portion 5310, a second connecting portion 5312 and an intermediate connecting portion 5311, the first connecting portion 5310 and the second connecting portion 5312 are connected through the intermediate connecting portion 5311 and connected to each other at an angle, and the connection of the intermediate connecting portion 5311 and the second connecting portion 5312 abuts against the conductive back plate of the display assembly 30.

[0051] Figure 6a and Figure 6b A second elastic arm 532 is also shown in FIG. 5, which is configured with a third connecting portion 5320 and a fourth connecting portion 5321 connected to the third connecting portion 5320, and the fourth connecting portion 5321 with a free end can abut against the circuit board.

[0052] Figure 6a And Figure 6b Only an example, but also by other forms of construction of the elastic arm, with the display assembly 30 or the circuit board 10 abutment.

[0053] Figure 3 and Figure 4 The display module 1 is shown in the A-A and B-B cross-sectional view, respectively, showing the connection mode of the grounding bracket 53.

[0054] Referring to Figure 3a And 3b The first elastic arm 531 passes through the bracket 20 of the display assembly 30 of the back plate abutment. The end of the first elastic arm 531 can be clamped with the bracket 20, for example, the bracket 20 is configured with a buckle part 23, the end of the first elastic arm 531 is clamped with the buckle part 23, in order to fix the free end of the first elastic arm 531.

[0055] Referring to Figure 4 The bracket 20 is configured with a support part 24, which can support the second elastic arm 532, so that it is stably abutted to the circuit board 10. Specifically, the third connecting part 5320 extends along the support part 24, and the fourth connecting part 5321 is abutted to the circuit board 10 under the support of the support part 24.

[0056] In order to facilitate the assembly of the bracket and the flexible circuit board assembly, the bracket 20 and the flexible circuit board assembly 50 can also be configured with each other's positioning column 60 and positioning hole 61. Referring to Figure 7 The positioning column 60 is provided on the bracket 20, and the positioning hole 61 is provided on the flexible circuit board assembly 50, and the positioning column 60 and the positioning hole 61 are diagonally arranged respectively to realize the predetermined positioning of the flexible circuit board assembly 50 in the X axis and Y axis direction. Specifically, the main body part 51 of the flexible circuit board assembly 50, the conductive double-sided adhesive tape 54, the metal reinforcing plate 55 and the corresponding position of the grounding bracket 53 all need to be holed to realize the cooperation of the flexible circuit board assembly 50 and the positioning column 60. In addition, the setting mode of the positioning column and the positioning hole can also be adjusted according to the need.

[0057] Figure 8 The assembly mode of the above display module 1 is shown. Specifically, the assembled touch module and display assembly 30 are installed on the bracket 20; then the flexible circuit board assembly 50 is partially placed on the corresponding position of the bracket 20, which can be pre-positioned by the positioning column 60, limiting the freedom of the flexible circuit board assembly 50 in the X axis and Y axis direction, pressing the first elastic arm 531 of the grounding bracket 53, so that the first elastic arm 531 contacts the back plate of the display assembly 30 through the bracket 20 of the avoiding part 22, and the buckle part 23 clamps the end of the first elastic arm 531, to ensure that it contacts the back plate of the display assembly 30 and does not come off.

[0058] Next, the circuit board 10 is assembled to the bracket 20, the bracket 20 is pressed from the upper portion to the second elastic arm 532 of the ground bracket 53 upper end, the freedom of the flexible circuit board assembly 50 in the Z axis direction is limited, so far through the pressure of the circuit board 10 and the display assembly 30 to the ground bracket 53, the ground bracket is completely fixed, the ground of the flexible circuit board assembly 50 is realized.

[0059] Through the embodiment of the utility model, the assembly mode of the flexible circuit board assembly of the display module is more simple; simultaneously, when carrying out after-sales maintenance or production line rework to the display module, only need to take down the circuit board from the bracket, then can easily take down the touch module, and the disassembly and assembly are more convenient, reduce product rework scrap rate.

[0060] The utility model embodiment further discloses a household appliance, including aforementioned display module 1. This household appliance can be refrigerator, washing machine, dishwasher, range hood and so on, wherein display module 1 can show the working condition of household appliance, also can be used to detect the touch signal of user.

[0061] The above, only for the specific implementation of the utility model, but the protection scope of the utility model is not limited to this, any skilled in the art person in the technology range disclosed by the utility model can easily think of various equivalent modifications or replacement, these modifications or replacement all should cover in the protection scope of the present application. Therefore, the protection scope of the utility model should be the protection scope of claim.

Claims

1. A touch module, comprising a touch sensor (40) and a flexible circuit board assembly (50) connected with the touch sensor (40), characterized in that, the flexible circuit board assembly (50) comprises a main body (51) and a grounding bracket (53) connected with the main body (51); the grounding bracket (53) is configured with a substrate (530) and a first elastic arm (531) and a second elastic arm (532) arranged on the substrate (530), and the first elastic arm (531) and the second elastic arm (532) extend along two sides of the plane on which the substrate (530) is located, respectively.

2. The touch module of claim 1, wherein, the first elastic arm (531) and the second elastic arm (532) are arranged on two adjacent sides of the substrate (530), respectively.

3. The touch module according to claim 1 or 2, wherein the second elastic arm (532) comprises two, and is arranged on the same side of the plane on which the substrate (530) is located and is arranged oppositely.

4. The touch module of claim 1, wherein, the first elastic arm (531) is configured with a hollow part.

5. The touch module according to any one of claims 1 to 4, wherein the first elastic arm (531) is configured with a first connecting part (5310) and a second connecting part (5312) connected with the first connecting part (5310) at an angle.

6. The touch module of claim 5, wherein, the first elastic arm (531) is further configured with an intermediate connecting part (5311) connecting the first connecting part (5310) and the second connecting part (5312) and being connected with each other at an angle.

7. The touch module of any one of claims 1-3, wherein, the second elastic arm (532) is configured with a third connecting part (5320) and a fourth connecting part (5321) connected with the third connecting part (5320).

8. A display module comprising a circuit board (10), a support (20) and a display assembly (30) arranged in a stack, characterized in that, Further comprising the touch module according to any one of claims 1-7, the touch module is arranged on the side of the display assembly (30) away from the bracket (20), wherein the flexible circuit board assembly (50) extends and is arranged on the side of the bracket (20) facing the circuit board (10), the first elastic arm (531) passes through the avoiding part (22) of the bracket (20) and abuts against the conductive back plate of the display assembly (30), and the second elastic arm (532) abuts against the circuit board (10). 9.The display module of claim 8, characterized in that, the circuit board (10) is configured with a grounding part, and the second elastic arm (532) abuts against the grounding part; and / or, the bracket (20) is configured with a supporting part (24) for supporting the second elastic arm (532); and / or, the bracket (20) is configured with a buckle part (23), and the end of the first elastic arm (531) is buckled with the buckle part (23).

10. The display module of claim 8 or 9, wherein, the bracket (20) and the flexible circuit board assembly (50) are respectively configured with positioning columns (60) and positioning holes (61) matched with each other; or, the bracket (20) and the flexible circuit board assembly (50) are respectively configured with positioning columns (60) and positioning holes (61) matched with each other, and the positioning columns (60) and the positioning holes (61) are respectively arranged at an angle.

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