Display module and household appliance

Abstract

The display module comprises a circuit board, a support, a display assembly and a touch sensor which are arranged in a stacked mode, and further comprises a flexible circuit board assembly connected with the touch sensor, and the flexible circuit board assembly extends and is arranged on the side, facing the circuit board, of the support; 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 and a first elastic arm arranged on the substrate, and the first elastic arm penetrates through an avoiding part of the support and abuts against a conductive back plate of the display assembly. The grounding support abuts against the conductive back plate of the display assembly, so that grounding of the flexible circuit board assembly is achieved. The display module is not only simple in assembly mode, but also easier to disassemble.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically to a display module and a household appliance. Background Technology

[0002] The technology of integrating touch integrated circuits on flexible printed circuit boards (FPCs) is widely used in the consumer electronics field. Grounding is typically required to increase electromagnetic compatibility reliability.

[0003] In the home appliance industry, display modules, including touch modules, commonly use conductive double-sided adhesive to ground a flexible printed circuit board (PCB) onto the back panel of the display screen or the copper-clad area of ​​the PCB. This method carries several risks. For example, assembly typically requires a jig for pressing and pasting, and the jig must avoid electronic components, making assembly complex. Secondly, to ensure reliable adhesion throughout the product's lifespan, strong conductive double-sided adhesive is usually chosen. Therefore, if the display screen is damaged and needs rework during production or after-sales service, the PCB must first be removed from the display. During disassembly, the metal reinforcing plate may deform under stress; this process can also damage components, rendering the entire touch module unusable. Furthermore, when reattaching the PCB to the back of the display screen after rework, the deformed metal reinforcing plate can reduce the grounding area, affecting grounding performance.

[0004] In summary, the method of bonding grounding has the risks of complex assembly, difficulty in disassembly, and high rework and scrap rates. Utility Model Content

[0005] The purpose of this invention is at least to provide a display module and a household appliance that include a grounding bracket, making the assembly structure of the display module simpler and easier to disassemble.

[0006] This utility model discloses a display module, including a stacked circuit board, a bracket, a display component, and a touch sensor. It also includes a flexible circuit board assembly connected to the touch sensor, extending from and disposed on the side of the bracket facing the circuit board. The flexible circuit board assembly includes a main body and a grounding bracket connected thereto. The grounding bracket has a substrate and a first elastic arm disposed on the substrate. The first elastic arm passes through a clearance portion of the bracket and abuts against a conductive backplate of the display component. Grounding of the flexible circuit board assembly is achieved by the grounding bracket abutting against the conductive backplate of the display component.

[0007] The above display module is not only simple to assemble, but also easier to disassemble. Specifically, grounding is achieved by abutting the first elastic arm of the grounding bracket against the display component. This allows the flexible circuit board assembly with the grounding bracket to be directly placed between the circuit board and the bracket during display module assembly, while the grounding bracket abuts against the display component through the bracket's clearance portion. Later, when disassembling the display module, simply remove the circuit board from the bracket, and then the flexible circuit board assembly and display component can be easily separated, thus avoiding damage to the flexible circuit board assembly and other related components, and reducing the module's scrap rate.

[0008] In one possible embodiment, the grounding bracket is further configured with a second elastic arm that abuts against the circuit board. The cooperation of the first and second elastic arms allows the grounding assembly to be stably positioned between the circuit board and the bracket, while ensuring the grounding of the flexible circuit board assembly.

[0009] In one possible embodiment, the circuit board is configured with a grounding portion, and the second elastic arm abuts against the grounding portion. The first and second elastic arms respectively achieve grounding of the flexible circuit board assembly and the circuit board, eliminating the need for a dedicated grounding structure on the circuit board and thus simplifying the structure of the display module.

[0010] In one possible embodiment, the first elastic arm and the second elastic arm extend along both sides of the plane where the substrate is located, forming an upper cantilever and a lower cantilever relative to the substrate, respectively abutting against the circuit board above the grounding bracket and the bracket below the grounding bracket and the display assembly.

[0011] In one possible embodiment, the first elastic arm and the second elastic arm are respectively disposed on adjacent sides of the substrate. Preferably, there are two second elastic arms, disposed on the same side of the plane of the substrate and arranged opposite to each other. By having the first elastic arm abutting downward against the display component and the two second elastic arms abutting downward against the circuit board, the stability of the structure and grounding performance can be ensured.

[0012] In one possible embodiment, the bracket is configured with a support portion for supporting the second elastic arm, thereby enabling the second elastic arm to more stably abut against the circuit board.

[0013] In one possible embodiment, the bracket is configured with a snap-fit ​​portion, and the end of the first elastic arm is snapped into the snap-fit ​​portion. The snap-fit ​​portion secures the first elastic arm, enhancing the contact and grounding between the first elastic arm and the display component. Furthermore, during the assembly of the display module, the first elastic arm is first snapped into the snap-fit ​​portion to secure the grounding bracket, and then the circuit board is pressed onto the grounding bracket. The snap-fit ​​portion makes the assembly of the display module more convenient.

[0014] In one possible embodiment, the support and the flexible circuit board assembly are respectively constructed with mutually cooperating positioning posts and positioning holes; preferably, the positioning posts and positioning holes are arranged diagonally. This positioning structure facilitates the assembly of the flexible circuit board assembly.

[0015] In one possible embodiment, the substrate of the grounding bracket is connected to the main body of the flexible circuit board assembly by conductive double-sided adhesive.

[0016] This utility model also discloses a household appliance, including the aforementioned display module. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the display module in an embodiment of this utility model;

[0018] Figure 2 This is an exploded view of the display module in an embodiment of this utility model;

[0019] Figure 3a This is an embodiment of the present utility model. Figure 1 Schematic diagram of the cross-sectional structure of the middle AA section;

[0020] Figure 3b This is a partially enlarged schematic diagram in Figure 3 of this utility model embodiment;

[0021] Figure 4 This is an embodiment of the present utility model. Figure 1 Schematic diagram of the cross-sectional structure of the middle BB section;

[0022] Figure 5 This is an exploded structural diagram of the flexible circuit board assembly in an embodiment of this utility model;

[0023] Figure 6a This is a three-dimensional structural diagram of the grounding bracket in an embodiment of this utility model;

[0024] Figure 6b This is a side view of the grounding bracket in an embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram of the assembled structure of the touch module, display component, and bracket in an embodiment of this utility model;

[0026] Figure 8 This is a schematic diagram of the assembly method of the display module in an embodiment of this utility model. Detailed Implementation

[0027] This utility model provides a display module with a novel grounding structure. The elastic arm of the grounding structure contacts the conductive backplate of the display component, and the grounding structure is fixed by the circuit board and the display component, thus realizing the grounding of the flexible circuit board component. The assembly method is simpler, the disassembly and assembly are more convenient, and the rework and scrap rate of the module is reduced.

[0028] Figure 1 and 2 A schematic diagram of display module 1 and its exploded structure is shown. (See attached diagram.) Figure 1 and 2 As shown, the display module 1 includes a circuit board 10, a bracket 20, a display component 30, and a touch sensor 40 stacked together. The circuit board 10 can be electrically connected to the display component 30 to provide power and control signals to the display component 30; the bracket 20 can support the circuit board 10 and the display component 30; and the touch sensor 40 can be disposed on the side of the display component 30 where the content is displayed.

[0029] A support structure can be installed on bracket 20 to support or fix the circuit board. (See reference...) Figure 2 The bracket 20 includes a first surface 21 facing the circuit board 10 and a first connecting portion 201 disposed on the first surface 21 for supporting the circuit board 10. Furthermore, the first connecting portion 201 may be provided with a snap-fit, so that the first connecting portion 201 can simultaneously support and fix the circuit board 10.

[0030] The bracket 20 also includes a second connecting portion 202 disposed on its side for supporting the display component 30. The second connecting portion 202 may be in the form of a snap-fit.

[0031] Understandably, in order to better support the circuit board and display components, multiple first and second connection parts can be set as needed.

[0032] Display component 30 is used to display content and may be a TFT display screen or other types of display screen.

[0033] The display module 1 also includes 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 to realize the touch detection function of the display module 1.

[0034] Touch sensor 40 is used to detect user touch signals to enable human-computer interaction. Touch sensor 40 can be resistive, capacitive, or other types. Touch sensor 40 is electrically connected to circuit board 10 via flexible circuit board assembly 50. (See reference...) Figure 1 and Figure 2 The flexible circuit board assembly 50 can be disposed on one side of the touch sensor 40 and can extend between the circuit board 10 and the bracket 20.

[0035] Reference Figure 5 The flexible circuit board assembly 50 includes a main body 51. A touch integrated circuit is disposed on the main body 51. The touch integrated circuit is a chip responsible for processing touch signals; it can detect touch position, gestures, and other inputs. This type of chip typically includes an analog front-end, a digital signal processor, memory, and other supporting circuitry.

[0036] The main body 51 is typically a flexible printed circuit board (FPC). An FPC is a flexible circuit board that can be bent or folded. An FPC can consist of a flexible substrate (such as polyimide), conductive traces (usually copper), and a cover layer.

[0037] Touch ICs are soldered directly onto the FPC (Flexible Printed Circuit) or connected via technologies such as ball grid arrays (BGAs) and chip-scale packaging. The pins of the touch ICs are connected to traces on the FPC, which transmit signals to other circuits or devices.

[0038] One end of the main body 51 is connected to the touch sensor 40, typically via pressure-sensitive adhesive or thermoforming. The electrodes of the touch sensor 40 are connected to the traces on the main body 51 to transmit touch signals.

[0039] The flexible circuit board assembly 50 is connected to the circuit board 10 via connector 52. Specifically, the other end of the body 51 is typically connected to the circuit board 10 via a zero-intercept connector, FPC connector, or other type of connector. This allows the touch sensor 40 to communicate with other components. (See reference...) Figure 1 and 2 The connector 52 of the flexible circuit board assembly 50 can be bent and pass through a notch in the circuit board 10 to connect to the circuit board 10.

[0040] To meet the requirements of circuit performance and electromagnetic compatibility, the flexible circuit board assembly 50 needs to be grounded. In this embodiment of the invention, the flexible circuit board assembly 50 also includes a grounding bracket 53 connected to the main body 51. The grounding bracket 53 can be attached to the main body 51 using conductive double-sided adhesive 54 and a metal reinforcing plate 55. (Refer to...) Figure 5 As shown.

[0041] The grounding bracket 53 can be grounded by contacting the conductive backplate of the display assembly 30. Specifically, refer to Figure 3 and... Figure 7 The grounding bracket 53 is disposed between the circuit board 10 and the bracket 20. The grounding bracket 53 has a first elastic arm 531, which can pass through the avoidance part 22 of the bracket 20 and abut against the conductive back plate of the display assembly 30. The grounding of the flexible circuit board assembly 50 is achieved through the electrical connection between the grounding bracket 53 and the conductive back plate.

[0042] The grounding bracket 53 may also be configured with a second elastic arm 532, which can abut against the circuit board 10. (See reference) Figure 4 The grounding bracket 53 is disposed between the circuit board 10 and the bracket 20. The pressure exerted by 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.

[0043] The circuit board 10 may also have a grounding portion, and the second elastic arm 532 can abut against this 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 this exposed copper area. In this way, the grounding of the flexible circuit board assembly 50 and the circuit board 10 can be achieved simultaneously through the first elastic arm 531 and the second elastic arm 532 of the grounding bracket 53. In addition, by using this grounding bracket, it is unnecessary to separately install other grounding structures such as springs on the circuit board.

[0044] Figure 6a and Figure 6b An embodiment of the grounding bracket 53 is shown. The grounding bracket 53 may be constructed with a substrate 530, a first elastic arm 531, and a second elastic arm 532, with the first elastic arm 531 and the second elastic arm 532 extending along both sides of the plane containing the substrate 530, that is, the first elastic arm 531 and the second elastic arm 532 are located on both sides of the plane containing the substrate 530. With this configuration, in the assembled display module, the first elastic arm 531 can abut against the conductive backplate of the display component 30, and the second elastic arm 532 can abut against the circuit board 10, for example... Figure 3a , 3b As shown in Figure 4, ensure that the flexible circuit board assembly 50 is grounded.

[0045] The first elastic arm 531 and the second elastic arm 532 can be respectively disposed on adjacent sides of the substrate 530. Further, the second elastic arm 532 can include two arms, disposed on the same side of the plane containing the substrate 530 and opposite to each other, so that the second elastic arms can support the circuit board 10 at different positions. Referring to FIG6, the substrate 530 is generally square, and the first elastic arm and two second elastic arms are disposed on three sides of the substrate, with the first elastic arm located between the two second elastic arms.

[0046] The first elastic arm 531 may be constructed with a hollow portion, so that when subjected to external force, the first elastic arm 531 can bend better, increasing its flexibility and adaptability.

[0047] In one embodiment, the first elastic arm 531 may be configured with interconnected connecting portions, such as a first connecting portion and a second connecting portion connected to the first connecting portion, and connected at an angle to each other. The connection point of the two connecting portions may abut against the conductive backplate of the display component, or the second connecting portion having a free end may abut against the conductive backplate of the display component.

[0048] Figure 6a and Figure 6b An embodiment of a first elastic arm 531 with three connecting portions is shown. The first elastic arm 531 is constructed with a first connecting portion 5310, a second connecting portion 5312, and an intermediate connecting portion 5311. The intermediate connecting portion 5311 connects the first connecting portion 5310 and the second connecting portion 5312, and they are connected at an angle to each other. The connection between the intermediate connecting portion 5311 and the second connecting portion 5312 abuts against the conductive backplate of the display assembly 30.

[0049] Figure 6a and Figure 6b The image also shows a second elastic arm 532, which is constructed with a third connecting portion 5320 and a fourth connecting portion 5321 connected to the third connecting portion 5320. The fourth connecting portion 5321, which has a free end, can abut against the circuit board.

[0050] Figure 6a and Figure 6b This is just one example; the flexible arm can also be constructed in other ways to abut against the display component 30 or the circuit board 10.

[0051] Figure 3 and Figure 4 The diagram shows cross-sectional views of display module 1 at AA and BB, respectively, illustrating the connection method of grounding bracket 53.

[0052] Reference Figure 3a and 3b The first elastic arm 531 passes through the clearance portion 22 of the bracket 20 and abuts against the back plate of the display assembly 30. The end of the first elastic arm 531 can be engaged with the bracket 20. For example, the bracket 20 is constructed with a latching portion 23, and the end of the first elastic arm 531 is engaged with the latching portion 23 to fix the free end of the first elastic arm 531.

[0053] Reference Figure 4 The bracket 20 has a support portion 24, which supports the second elastic arm 532 so that it is stably abutted against the circuit board 10. Specifically, the third connecting portion 5320 extends approximately along the support portion 24, and the fourth connecting portion 5321 abuts against the circuit board 10 under the support of the support portion 24.

[0054] To facilitate the assembly of the bracket and the flexible circuit board assembly, the bracket 20 and the flexible circuit board assembly 50 may also be constructed with mutually cooperating positioning posts 60 and positioning holes 61. (Refer to...) Figure 7 Positioning posts 60 are provided on the bracket 20, and positioning holes 61 are provided on the flexible circuit board assembly 50. The positioning posts 60 and positioning holes 61 are arranged diagonally to achieve pre-positioning of the flexible circuit board assembly 50 in the X-axis and Y-axis directions during assembly.

[0055] Specifically, holes need to be made at corresponding positions on the main body 51 of the flexible circuit board assembly 50, the conductive double-sided adhesive 54, the metal reinforcing plate 55, and the grounding bracket 53 to allow the flexible circuit board assembly 50 to cooperate with the positioning post 60. Furthermore, the arrangement of the positioning post and positioning hole can be adjusted as needed.

[0056] Figure 8 The assembly method of the above-mentioned display module 1 is shown. Specifically, the assembled touch module and display component 30 are first installed on the bracket 20; then, the flexible circuit board assembly 50 is partially placed in the corresponding position of the bracket 20, which can be pre-positioned by the positioning post 60 to restrict the degree of freedom of the flexible circuit board assembly 50 in the X and Y axis directions. The first elastic arm 531 of the grounding bracket 53 is pressed so that the first elastic arm 531 contacts the back plate of the display component 30 through the avoidance part 22 of the bracket 20. At the same time, the latching part 23 latches the end of the first elastic arm 531 to ensure that it contacts the back plate of the display component 30 and does not loosen.

[0057] The next step is to assemble the circuit board 10 onto the bracket 20. The bracket 20 presses down on the second elastic arm 532 at the upper end of the grounding bracket 53 from above, restricting the degree of freedom of the flexible circuit board assembly 50 in the Z-axis direction. Thus, through the pressure of the circuit board 10 and the display assembly 30 on the grounding bracket 53, the grounding bracket is completely fixed, and the grounding of the flexible circuit board assembly 50 is achieved.

[0058] Through the embodiments of this utility model, the assembly method of the flexible circuit board assembly of the display module is simpler; at the same time, when performing after-sales maintenance or production line rework on the display module, it is only necessary to remove the circuit board from the bracket, and then the touch module can be easily removed, making disassembly and assembly more convenient and reducing the product rework and scrap rate.

[0059] This utility model embodiment also discloses a household appliance, including the aforementioned display module 1. The household appliance can be a refrigerator, washing machine, dishwasher, range hood, etc., wherein the display module 1 can display the operating status of the household appliance and can also be used to detect user touch signals.

[0060] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A display module, comprising a circuit board (10), a support (20), a display assembly (30) and a touch sensor (40) arranged in a stack, characterized in that, a flexible circuit board assembly (50) connected to the touch sensor (40) is further included, the flexible circuit board assembly (50) extending and arranged on a side of the support (20) facing the circuit board (10); the flexible circuit board assembly (50) comprises a main body (51) and a grounding support (53) connected thereto, wherein the grounding support (53) is configured with a substrate (530) and a first elastic arm (531) arranged on the substrate (530), the first elastic arm (531) passing through an avoiding portion (22) of the support (20) and abutting against a conductive back plate of the display assembly (30) to realize grounding of the flexible circuit board assembly (50).

2. The display module of claim 1, wherein, the grounding support (53) is further configured with a second elastic arm (532), the second elastic arm (532) abutting against the circuit board (10).

3. The display module of claim 2, wherein the display module is configured to be mounted to a display module mounting surface of a display module mounting structure. the circuit board (10) is configured with a grounding portion, the second elastic arm (532) abutting against the grounding portion.

4. The display module of claim 3, wherein the display module is configured to be mounted on a display device. the first elastic arm (531) and the second elastic arm (532) respectively extend along two sides of a plane where the substrate (530) is located; and / or, the first elastic arm (531) and the second elastic arm (532) are respectively arranged on two adjacent sides of the substrate (530).

5. The display module of claim 2, wherein the display module is configured to be mounted on a display device. the second elastic arm (532) comprises two and is arranged on the same side of the plane where the substrate (530) is located and oppositely.

6. The display module of any one of claims 2-5, wherein, the support (20) is configured with a supporting portion (24) for supporting the second elastic arm (532).

7. The display module of any one of claims 1-5, wherein the display module is configured to be mounted to a display device. the support (20) is configured with a clamping portion (23), an end of the first elastic arm (531) being clamped with the clamping portion (23).

8. The display module of any one of claims 1-5, wherein, the support (20) and the flexible circuit board assembly (50) are respectively configured with a positioning column (60) and a positioning hole (61) matched with each other; or, the support (20) and the flexible circuit board assembly (50) are respectively configured with a positioning column (60) and a positioning hole (61) matched with each other, and the positioning column (60) and the positioning hole (61) are respectively arranged diagonally.

9. The display module of claim 1, wherein, the substrate (530) of the grounding support (53) connected with the main body (51) of the flexible circuit board assembly (50) through a conductive double-sided adhesive.

10. A domestic appliance characterized in that, comprising the display module according to claim 8.

Images