CN220457652U

CN220457652U - Take elastic PCB board and display module assembly

Info

Publication number: CN220457652U
Application number: CN202322024385.2U
Authority: CN
Inventors: 黄素玲
Original assignee: Truly Semiconductors Ltd
Current assignee: Truly Semiconductors Ltd
Priority date: 2023-07-28
Filing date: 2023-07-28
Publication date: 2024-02-06
Anticipated expiration: 2033-07-28

Abstract

The utility model provides an elastic PCB and a display module, the elastic PCB comprises: the novel flexible printed circuit board comprises a first PCB (1), a second PCB (2) and an elastic connecting portion (3), wherein the elastic connecting portion (3) is located between the first PCB (1) and the second PCB (2) and used for connecting the first PCB (1) and the second PCB (2) to realize signal transmission between the first PCB (1) and the second PCB (2), and the elastic connecting portion (3) is in a snake-like spring shape. Through setting up elastic connection portion, elastic connection portion is the snakelike spring form and makes the PCB board obtain the microbending ability to adapt to different space heights, for traditional scheme that adopts FPC bridging, save the die sinking material cost, save the cost of labor of welding switching FPC production link, improve signal transmission quality.

Description

Take elastic PCB board and display module assembly

Technical Field

The utility model relates to the technical field of PCBs, in particular to a PCB with elasticity and a display module.

Background

The PCB board (Printed Circuit Board ) is an important electronic component, is a support for electronic components, and is a carrier for electrically interconnecting the electronic components. Almost every electronic device, as small as an electronic watch, a calculator, as large as a computer, a communication electronic device, a military weapon system, has only electronic components such as an integrated circuit, and a printed circuit board is used for electrically interconnecting the respective components.

In the field of liquid crystal display modules, a PCB mainly plays a role in connection between a TFT (Thin Film Transistor, a thin film transistor) and a client terminal complete machine, so that a client can conveniently control the display of the TFT by inputting signals at the complete machine terminal. Along with the improvement of science and technology, the display module is thinner and thinner, so that the internal space of the whole machine is limited, the limited high requirement on electronic elements is met, in the whole machine design, the space heights of the PCB are different, and based on the use environment and the cost consideration of the display module, the PCB used in the liquid crystal display module is usually made of FR4 glass fiber board as a base material, and the elasticity is poor and cannot be bent and deflected, so that a plurality of PCB plates are required to be arranged in the ultrathin display module to adapt to different space heights and accommodate more circuit elements.

In the prior art, the technical scheme adopted generally is as follows: the PCB1 and the PCB2 are arranged, and the PCB1 and the PCB2 are connected by adopting a bridging FPC, so that the purpose of bending the PCB to adapt to different space height limits is achieved. However, this solution has the following drawbacks: 1. a plurality of PCB production modules are needed; 2. the production link of welding and switching the FPC is increased; 3. the traditional scheme bridges the scheme of the FPC, and signals are transmitted on different media, so that signal integrity is not facilitated.

Disclosure of Invention

The utility model aims to solve the defects in the prior art and provides a flexible PCB and a display module.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

in a first aspect, an embodiment of the present utility model provides a PCB board with elasticity, including: the device comprises a first PCB, a second PCB and an elastic connecting part, wherein the elastic connecting part is positioned between the first PCB and the second PCB and used for connecting the first PCB and the second PCB so as to realize signal transmission between the first PCB and the second PCB, and the elastic connecting part is in a serpentine spring-like shape.

As a preferable modification of the present utility model, the line width of the elastic connection portion is W, and the length of the bent portion of the elastic connection portion is at least 5W.

As a preferred modification of the present utility model, the PCB board with elasticity includes: glass fiber layer and metal layer.

As a preferred modification of the present utility model, the glass fiber layer and the metal layer are bonded by epoxy resin.

As a preferred modification of the present utility model, the glass fiber layer includes: glass fiber cloth and epoxy resin.

As a preferable modification of the present utility model, the metal layer is a copper foil.

As a preferable modification of the present utility model, the first PCB and the second PCB are provided with circuit elements, and the elastic connection portion is not provided with circuit elements.

As a preferred modification of the present utility model, the PCB board with elasticity includes: and the waterproof coating covers the PCB with elasticity.

As a preferable improvement of the utility model, the PCB board with elasticity is a single-panel, double-panel or multi-layer board.

In a second aspect, an embodiment of the present utility model provides a display module, including the above-mentioned flexible PCB board, where the flexible PCB board is used to connect a TFT and a client complete machine.

Compared with the prior art, the utility model has the advantages and positive effects that,

according to the PCB, the elastic connecting part is arranged, and is in a snake-like spring shape, so that the PCB can obtain micro-bending capacity, and therefore, the PCB is suitable for different space heights, and compared with a traditional scheme of bridging by using FPC, the PCB has the following advantages:

1. the material cost is saved: only 1 set of PCB die is needed;

2. the labor cost is saved: the production link of welding and transferring the FPC is not needed to be added;

3. improving signal quality: the signals work on the same PCB, and the EMC effect is better.

Drawings

Fig. 1 is a schematic structural diagram of a PCB board with elasticity according to the present utility model;

FIG. 2 is a schematic structural view of an elastic connection part according to the present utility model;

fig. 3 is a schematic structural diagram of a PCB board with elasticity according to the present utility model.

Legend description:

1. a first PCB; 2. a second PCB; 3. an elastic connection part; 4. a glass fiber layer; 5. a metal layer.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.

Furthermore, the terms "first," "second," and the like, may be used herein to describe various directions, acts, steps, or elements, etc., but these directions, acts, steps, or elements are not limited by these terms. These terms are only used to distinguish one direction, action, step or element from another direction, action, step or element. For example, a first PCB may be referred to as a second PCB, and similarly, a second PCB may be referred to as a first PCB, without departing from the scope of the present application. Both the first PCB and the second PCB are PCBs, but they are not the same PCB. The terms "first," "second," and the like, are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

Examples

Referring to fig. 1-2, an embodiment of the present utility model provides a flexible PCB board, including: the PCB comprises a first PCB1, a second PCB2 and an elastic connecting part 3, wherein the elastic connecting part 3 is positioned between the first PCB1 and the second PCB2 and is used for connecting the first PCB1 and the second PCB2 so as to realize signal transmission between the first PCB1 and the second PCB2, and the elastic connecting part 3 is in a serpentine spring-like shape.

It should be noted that the flexible PCB board in the embodiment of the present utility model may further include a third PCB, and the fourth PCB … … may have the above-mentioned flexible connection portion disposed between each PCB to realize signal transmission, and flexibly adapt to different space height restrictions inside the display module.

As a preferred embodiment, referring to fig. 2, an embodiment of the present utility model provides an elastic connection portion 3 with a line width W, and a length of a bent portion of the elastic connection portion 3 is at least 5W. This has the advantage that the elastic connection 3 has good elasticity and is not easy to break.

Referring to fig. 3, an elastic PCB according to an embodiment of the present utility model includes: glass fiber layer 4 and metal layer 5.

Wherein, the glass fiber layer 4 and the metal layer 5 are bonded by epoxy resin. This is because the epoxy resin can be melted at high temperature to have fluidity, and thus the glass fiber layer 4 can be bonded to the metal layer 5. In addition, the epoxy resin has good heat resistance, stability and insulativity so as to ensure the stability of the PCB during operation.

Further, the glass fiber layer 4 includes: glass fiber cloth and epoxy resin. The epoxy resin can be covered on the surface of the glass fiber cloth, and when the glass fiber layer 4 and the metal layer 5 are adhered by adopting a heating and pressing method, the epoxy resin can not only serve as an adhesive of the glass fiber layer 4 and the metal layer 5, but also can fill gaps between the glass fiber cloth. The glass fiber cloth may include one or more of glass fiber cloth, glass fiber prepreg, glass fiber non-woven fabric prepreg, and the like. Based on the use environment and cost of the display module, the PCB board used in the lcd module is usually made of FR4 glass fiber.

Further, the metal layer 5 is copper foil. Since the circuit pattern is formed by etching the metal layer 5 when the PCB board is manufactured, it is preferable that the metal layer 5 is made of a metal material having good conductive properties, for example, silver, aluminum, tungsten, copper, an alloy thereof, and the like. The metal layer 5 is preferably a copper foil in view of stability and etching process and the like.

In the flexible PCB board provided by the embodiment of the present utility model, circuit elements are disposed on the first PCB1 and the second PCB2, and no circuit element is disposed on the flexible connection portion 3. The advantage of this is: because the elastic connection portion 3 is in a long-term stress state for keeping the height difference between the first PCB and the second PCB in actual use, although the probability is very small, there is a risk of damage, therefore, circuit elements are only arranged on the first PCB1 and the second PCB2, no circuit element is arranged on the elastic connection portion 3, and the elastic connection portion 3 only plays a role of electrical connection, so that damage of the circuit elements is avoided.

According to the elastic PCB provided by the embodiment of the utility model, the elastic PCB further comprises the waterproof coating, the waterproof coating covers the elastic PCB, and the waterproof coating can be fully covered after the production of the PCB is completed, so that the PCB has good waterproof and moistureproof capabilities, and circuit damage is reduced.

Wherein, take elastic PCB board is single-sided board, double-sided board or multiply wood. The flexible PCB provided by the embodiment of the present utility model may be a plurality of types of PCBs commonly found in the market, including but not limited to the types of PCBs described above.

On the other hand, an embodiment of the utility model also provides a display module, which comprises the elastic PCB in any embodiment of the utility model, wherein the elastic PCB is used for connecting the TFT and the whole client. The client can control the display of the TFT by inputting a signal to the whole machine, and the technical effects brought by the display module in this embodiment refer to the technical effects in any of the above embodiments.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims

1. A flexible PCB board comprising: the novel flexible printed circuit board comprises a first PCB (1), a second PCB (2) and an elastic connecting portion (3), wherein the elastic connecting portion (3) is located between the first PCB (1) and the second PCB (2) and used for connecting the first PCB (1) and the second PCB (2) to realize signal transmission between the first PCB (1) and the second PCB (2), and the elastic connecting portion (3) is in a snake-like spring shape.

2. The flexible PCB of claim 1, wherein the line width of the flexible connection part (3) is W, and the length of the bent part of the flexible connection part (3) is at least 5W.

3. The flexible PCB of claim 1, comprising: glass fiber layer (4) and metal layer (5).

4. A flexible PCB board according to claim 3, characterized in that the glass fiber layer (4) is bonded to the metal layer (5) by means of epoxy resin.

5. A flexible PCB board according to claim 3, characterized in that the glass fiber layer (4) comprises: glass fiber cloth and epoxy resin.

6. A flexible PCB board according to claim 3, characterized in that the metal layer (5) is copper foil.

7. A flexible PCB board according to claim 1, characterized in that circuit elements are arranged on the first PCB (1) and the second PCB (2), and that no circuit elements are arranged on the flexible connection part (3).

8. The flexible PCB of claim 1, comprising a waterproof coating covering the flexible PCB.

9. The flexible PCB of claim 1, wherein the flexible PCB is a single-panel, double-panel, or multi-layer board.

10. A display module comprising the flexible PCB of any of claims 1-9, wherein the flexible PCB is configured to connect a TFT and a client complete machine.