CN110996497B

CN110996497B - Flexible circuit board and terminal equipment

Info

Publication number: CN110996497B
Application number: CN201911357166.8A
Authority: CN
Inventors: 熊健劲
Original assignee: Huizhou TCL Mobile Communication Co Ltd
Current assignee: Zhang Daming
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2021-06-15
Anticipated expiration: 2039-12-25
Also published as: CN110996497A

Abstract

The invention discloses a flexible circuit board and a terminal device, wherein the flexible circuit board comprises: a printed circuit board; the first interface is arranged at the first end of the printed circuit board; the second interface is arranged at the second end of the printed circuit board; and a plurality of resistors; the first interface comprises a plurality of first signal pins, each first signal pin is electrically connected to a first pin of a corresponding resistor, the second interface comprises a plurality of second signal pins, and each second signal pin is electrically connected to a second pin of the corresponding resistor. According to the invention, the zero-ohm resistor is connected in series on each signal wire to serve as a lead, and when the definition of a signal interface is changed, a cut line is not needed to disconnect the connecting wire, so that the flexible circuit board is not damaged.

Description

Flexible circuit board and terminal equipment

Technical Field

The invention relates to the technical field of electronics, in particular to a flexible circuit board and terminal equipment.

Background

With the development of science and technology, the functions of electronic products are more and more, and chip components on the circuit board are increased. However, when the components are disposed on the Flexible Printed Circuit board, in an early stage of product development, a Flexible Printed Circuit (FPC) of the product is generally designed in advance for verifying functions of devices such as a camera module and a Liquid Crystal Display (LCD). Taking a camera module as an example, the current FPC design is generally designed according to the respective pin definitions of the motherboard of the terminal device and the camera module interface.

However, once the camera module manufacturer updates and adjusts the interface definition, the transfer FPC developed for the product in the earlier stage cannot be used because the signal pins corresponding to different signal interfaces are changed. Therefore, it takes additional time and money to redesign and manufacture the FPC, resulting in an extension of a product development period and an increase in development cost.

Disclosure of Invention

The embodiment of the invention provides a flexible circuit board and a terminal device, which can effectively solve the problem that the flexible circuit board cannot be used when the interface definition of a product is readjusted.

According to an aspect of the present application, an embodiment of the present invention provides a flexible wiring board, including: a printed circuit board; the first interface is arranged at the first end of the printed circuit board; the second interface is arranged at the second end of the printed circuit board; and a plurality of resistors; the first interface comprises a plurality of first signal pins, each first signal pin is electrically connected to a first pin of a corresponding resistor, the second interface comprises a plurality of second signal pins, and each second signal pin is electrically connected to a second pin of the corresponding resistor. Further, the first interface is used for being electrically connected with the display panel interface.

Further, the resistance value of the resistor is zero ohm.

Further, the resistor is arranged on the printed circuit board close to the first interface.

Furthermore, the first interface is used for being electrically connected with an external functional device interface, and signal pins of the functional device interface correspond to the first signal pins of the first interface one to one.

Furthermore, the first interface is used for being electrically connected with an external camera module interface.

Further, the second interface is used for electrically connecting with a main board interface of an external terminal device.

Furthermore, a part of the first signal pins to be jumped in the plurality of first signal pins is electrically connected to the second pins of the resistors corresponding to the second signal pins to be jumped in another part of the plurality of second signal pins through the first pins of the resistors corresponding to the first signal pins and the first pins of the resistors corresponding to the first signal pins to be jumped in the plurality of first signal pins through wires.

Further, the conducting wire is an enameled wire.

Further, the number of the first signal pins of the first interface is the same as that of the second signal pins of the second interface.

According to another aspect of the present application, an embodiment of the present invention provides a terminal device, including the flexible wiring board described above.

The invention has the advantages that the zero-ohm resistors are connected in series on each signal wire to serve as the conducting wires, and when the definition of the signal interface is changed, the wires are not required to be cut off, so that the flexible circuit board is not damaged. The welding wire is welded on the welding pad of the zero ohm resistor, and the other end of the wire is electrically connected to the corresponding welding pad of the other zero ohm resistor, so that the welding operation of an operator is facilitated, the adjustment of a signal sequence is easy to realize, and the flexible circuit board does not need to be redesigned and manufactured.

Drawings

The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.

Fig. 1 is a schematic structural diagram of a flexible printed circuit provided in an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.

Fig. 3 is another schematic structural diagram of a terminal device according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. In this embodiment, the analog display screen touch module is connected to the head tracking module, and is configured to obtain a moving path of a sensing cursor in the display device.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

As shown in fig. 1, a schematic structural diagram of a flexible printed circuit provided in an embodiment of the present invention includes: a printed wiring board 102; a first interface 100 disposed at a first end of the printed circuit board 102; a second interface 101 disposed at a second end of the printed circuit board 102; a plurality of resistors. The first interface 100 includes a plurality of first signal pins, each of which is connected to a first pin of a corresponding resistor, and the second interface 101 includes a plurality of second signal pins, each of which is electrically connected to a second pin of a corresponding resistor.

In addition, the resistance value of the resistor is zero ohm, and the aim of the design is to use the zero ohm resistor as a lead to ensure the effective transmission of signals. The resistor is disposed on the printed wiring board near the first interface 100.

Further, the first interface is configured to be electrically connected to an external functional device interface, and signal pins of the functional device interface are in one-to-one correspondence with first signal pins of the first interface 100. The functional device can be a camera module or a display panel. In this embodiment, the first interface 100 is used for electrically connecting with an external camera module interface.

The second interface 101 is used for electrically connecting with a motherboard interface of an external terminal device.

And part of the first signal pins to be jumped in the plurality of first signal pins are electrically connected to the second pins of the resistors corresponding to the second signal pins to be jumped in the other part of the plurality of second signal pins through the first pins of the resistors corresponding to the first signal pins and the first pins of the resistors corresponding to the first signal pins. The wire is an enameled wire, but is not limited thereto. The number of the first signal pins of the first interface is the same as or different from that of the second signal pins of the second interface.

In this embodiment, the first interface 100 includes thirty pins (1-30 in fig. 1), wherein the first signal pin is twenty. The second interface 101 includes thirty pins (31-60 in fig. 1), with twenty second signal pins. The first signal pin is correspondingly and electrically connected with the second signal pin through a resistor. For example, the first signal pin 1 of the first interface 100 is electrically connected to the second signal pin 31 of the second interface 101 through the resistor R1.

Each first signal pin is electrically connected with the corresponding second signal pin through the resistor, and each resistor is provided with a first pin (namely a first welding point) and a second pin (second welding point), so that when the definition of a signal interface is changed, a cutting line is not needed to break a connecting line, and the flexible circuit board is not damaged.

When the definition of the signal interface changes, the specific situation is as follows:

when the first interface 100 definition of the Flexible Printed Circuit (FPC for short) is not matched with the interface definition of the camera module, it is necessary to perform jumper operation to normally use the interface. For example: in fig. 1, the pair of signals of the first signal pin 1 and the first signal pin 2 of the first interface 100 and the pair of signals of the first signal pin 4 and the first signal pin 5 of the first interface 100 are exchanged for normal use, and the following operations are required:

the four zero-ohm resistors R1, R2, R3 and R4 are not subjected to the die bonding (i.e., the four resistors R1, R2, R3 and R4 are taken out), and the four pins of the first signal pin 1, the first signal pin 2, the first signal pin 4 and the first signal pin 5 of the first interface 100 are disconnected from the corresponding second signal pins (31, 32, 34 and 35) of the second interface 101 at the other end.

And then, a wire (such as enameled wire) is used for jumping, and a first pin of R1 is welded and connected with a second pin of R3, a first pin of R2 is welded with a second pin of R4, a first pin of R3 is welded with a second pin of R1, and a first pin of R4 is welded with a second pin of R2.

And the rest signal wires matched with the definition of the camera module interface need to be welded with zero-ohm resistors, so that normal conduction is realized.

The zero-ohm resistor is connected in series on each signal line to serve as a lead, and when the definition of a signal interface changes, a cut line is not needed to disconnect the connecting line, so that the flexible circuit board is not damaged. The welding wire is welded on the welding pad of the zero ohm resistor, and the other end of the wire is electrically connected to the corresponding welding pad of the other zero ohm resistor, so that the welding operation of an operator is facilitated, the adjustment of a signal sequence is easy to realize, and the flexible circuit board does not need to be redesigned and manufactured.

As shown in fig. 2, a terminal device is further provided for the embodiment of the present invention, where the terminal device adopts the printed circuit board according to the embodiment, and the terminal device may be a smart phone, a tablet computer, or other devices. Specifically, as shown in fig. 2, the terminal device 200 includes a processor 201 and a memory 202. The processor 201 is electrically connected to the memory 202.

The processor 201 is a control center of the terminal device 200, connects various parts of the entire terminal device by using various interfaces and lines, and performs various functions of the terminal device and processes data by running or loading an application program stored in the memory 202 and calling data stored in the memory 202, thereby performing overall monitoring of the terminal device.

Fig. 3 shows a specific structural block diagram of a terminal device according to an embodiment of the present invention. The terminal device 300 may be a smart phone or a tablet computer.

The RF circuit 310 is used for receiving and transmitting electromagnetic waves, and performing interconversion between the electromagnetic waves and electrical signals, thereby communicating with a communication network or other devices. RF circuitry 310 may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and so forth. RF circuit 310 may communicate with various networks such as the internet, an intranet, a wireless network, or with other devices over a wireless network. The wireless network may comprise a cellular telephone network, a wireless local area network, or a metropolitan area network. The Wireless network may use various Communication standards, protocols, and technologies, including, but not limited to, Global System for Mobile Communication (GSM), Enhanced Data GSM Environment (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Wireless Fidelity (Wi-Fi) (e.g., IEEE802.11a, IEEE802.11 b, IEEE 802.2.access, and/or IEEE802.11 n), Voice over Internet Protocol (VoIP), world wide Internet Microwave Access (Microwave for Wireless Communication), other suitable protocols for short message service (Max), and any other suitable protocols, and may even include those protocols that have not yet been developed.

The memory 320 may be used to store software programs and modules, and the processor 380 executes various functional applications and data processing by operating the software programs and modules stored in the memory 320. The memory 320 may include high speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, memory 320 may further include memory located remotely from processor 380, which may be connected to terminal device 300 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The input unit 330 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, the input unit 330 may include a touch-sensitive surface 331 as well as other input devices 332. The touch-sensitive surface 331, also referred to as a touch screen or touch pad, may collect touch operations by a user on or near the touch-sensitive surface 331 (e.g., operations by a user on or near the touch-sensitive surface 331 using a finger, a stylus, or any other suitable object or attachment), and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface 331 may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 380, and can receive and execute commands sent by the processor 380. In addition, the touch-sensitive surface 331 may be implemented using various types of resistive, capacitive, infrared, and surface acoustic waves. The input unit 330 may comprise other input devices 332 in addition to the touch sensitive surface 331. In particular, other input devices 332 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit 340 may be used to display information input by or provided to the user and various graphic user interfaces of the terminal apparatus 300, which may be configured by graphics, text, icons, video, and any combination thereof. The Display unit 340 may include a Display panel 341, and optionally, the Display panel 341 may be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like. Further, touch-sensitive surface 331 may overlay display panel 341, and when touch-sensitive surface 331 detects a touch operation thereon or thereabout, communicate to processor 380 to determine the type of touch event, and processor 380 then provides a corresponding visual output on display panel 341 in accordance with the type of touch event. Although in FIG. 3, touch-sensitive surface 331 and display panel 341 are implemented as two separate components for input and output functions, in some embodiments, touch-sensitive surface 331 and display panel 341 may be integrated for input and output functions.

The terminal device 300 may also include at least one sensor 350, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel 341 according to the brightness of ambient light, and a proximity sensor that may turn off the display panel 341 and/or the backlight when the terminal device 300 is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured in the terminal device 300, detailed descriptions thereof are omitted.

Audio circuitry 360, speaker 361, microphone 362 may provide an audio interface between a user and terminal device 300. The audio circuit 360 may transmit the electrical signal converted from the received audio data to the speaker 361, and the audio signal is converted by the speaker 361 and output; on the other hand, the microphone 362 converts the collected sound signal into an electrical signal, which is received by the audio circuit 360 and converted into audio data, which is then processed by the audio data output processor 380 and then transmitted to, for example, another terminal via the RF circuit 310, or the audio data is output to the memory 320 for further processing. The audio circuit 360 may also include an earbud jack to provide communication of peripheral headphones with the terminal device 300.

The terminal device 300 may assist the user in e-mail, web browsing, streaming media access, etc. through the transmission module 370 (e.g., a Wi-Fi module), which provides the user with wireless broadband internet access. Although fig. 3 shows the transmission module 370, it is understood that it does not belong to the essential constitution of the terminal device 300, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The processor 380 is a control center of the terminal device 300, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the terminal device 300 and processes data by running or executing software programs and/or modules stored in the memory 320 and calling data stored in the memory 320, thereby performing overall monitoring of the mobile phone. Optionally, processor 380 may include one or more processing cores; in some embodiments, processor 380 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 380.

Terminal device 300 also includes a power supply 390 (e.g., a battery) for powering the various components, which may be logically coupled to processor 380 via a power management system in some embodiments to manage charging, discharging, and power consumption management functions via the power management system. The power supply 390 may also include any component including one or more of a dc or ac power source, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.

Although not shown, the terminal device 300 may further include a camera (e.g., a front camera, a rear camera), a bluetooth module, and the like, which are not described in detail herein.

In specific implementation, the above modules may be implemented as independent entities, or may be combined arbitrarily to be implemented as the same or several entities, and specific implementation of the above modules may refer to the foregoing method embodiments, which are not described herein again.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The principle and the implementation of the present invention are explained in the present text by applying specific examples, and the above description of the examples is only used to help understanding the technical solution and the core idea of the present invention; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A flexible wiring board, comprising:

a printed circuit board;

the first interface is arranged at the first end of the printed circuit board;

the second interface is arranged at the second end of the printed circuit board; and a plurality of resistors;

the first interface comprises a plurality of first signal pins, each first signal pin is electrically connected to a first pin of a corresponding resistor, the second interface comprises a plurality of second signal pins, and each second signal pin is electrically connected to a second pin of the corresponding resistor;

the resistance value of the resistor is zero ohm, and a part of first signal pins to be jumped in the plurality of first signal pins is electrically connected to second pins of the resistor corresponding to second signal pins to be jumped in another part of the plurality of second signal pins through the first pins of the resistor corresponding to the first signal pins and through a lead;

the plurality of first signal pins, the plurality of second signal pins and the plurality of resistors are all connected in a one-to-one correspondence manner.

2. The flexible wiring board of claim 1, wherein the resistor is disposed on the printed wiring board proximate the first interface.

3. The flexible circuit board of claim 1, wherein the first interface is configured to electrically connect to an external functional device interface, and signal pins of the functional device interface are in one-to-one correspondence with the first signal pins.

4. The flexible wiring board of claim 1, wherein the first interface is configured to electrically connect to an external camera module interface.

5. The flexible wiring board of claim 1, wherein the second interface is configured to electrically connect to a motherboard interface of an external terminal device.

6. The flexible wiring board of claim 1, wherein the conductive wire is a lacquered wire.

7. The flexible wiring board of claim 1, wherein the number of first signal pins of the first interface is the same as the number of second signal pins of the second interface.

8. A terminal device characterized by comprising the flexible wiring board according to any one of claims 1 to 7.