A connection structure and method of an OLED digital display screen and a PCB board

Abstract

This invention discloses a connection structure and method for an OLED digital display screen and a PCB board, relating to the field of electronic product digital display screen connection technology. The connection structure includes an OLED digital display screen, a PCB board, an FFC flexible flat cable, and an FFC connector female mounted on the PCB board. The FFC connector female is equipped with a flip-type self-locking mechanism. During connection, the locking plate is rotated open, the FFC flexible flat cable is inserted, and then the locking plate is reset to close, achieving self-locking fixation. This invention combines the advantages of front-assembly soldered connection and rear-assembly BTB connection, balancing connection strength and assembly convenience. It effectively avoids display screen breakage caused by molding, welding, or external force processes, requires no additional adhesive fixation, and facilitates repair and disassembly.

Description

Technical Field

[0001] This invention belongs to the field of electronic product digital display screen connection technology, and relates to a connection structure and connection method between an OLED digital display screen and a PCB board. Background Technology

[0002] Currently, the connection methods between the digital display OLED screen and the PCB board of this type of product on the market are divided into front assembly and rear assembly.

[0003] Example 1: The connection method used in Miwu digital display products is front assembly, which means that the OLED display screen is directly soldered to the PCB board via FFC flexible flat cable and then adhered with 3M adhesive before processing. During the processing, the display screen is prone to cracking, and this situation cannot be detected. The problem of the display screen not displaying will only appear after a period of use.

[0004] Example 2: Cooltech digital display products use a post-assembly connection method, which means that the product is processed first and then the OLED display is assembled. The connection between the screen and the PCB board is a BTB connection method. This method is simple and easy to assemble, but the connection is not firm. After assembly, additional glue is needed to fix it to prevent it from loosening due to vibration, which would cause the display to stop working. Summary of the Invention

[0005] In view of the problems existing in the prior art, the present invention provides a connection structure and connection method between an OLED digital display screen and a PCB board to solve the above-mentioned technical problems.

[0006] To achieve the above and other objectives, the technical solution adopted by the present invention is as follows: A connection structure between an OLED digital display screen and a PCB board includes an OLED digital display screen (1), a PCB board and an FFC flexible flat cable, characterized in that: it further includes a connecting female, the surface of which is mounted on the PCB board, the OLED digital display screen is connected to the connecting female through its own FFC flexible flat cable, and the connecting female is provided with a flip-type self-locking mechanism.

[0007] Preferably, the flip-type self-locking mechanism is a front-hinged locking plate or a rear-hinged locking plate. The locking plate is rotated open to allow the FFC flexible flat cable to be inserted, and the locking plate is pressed down to close and press the FFC flexible flat cable tightly and securely.

[0008] Preferably, the OLED digital display screen is equipped with a driver IC, and the FFC flexible flat cable has multiple parallel conductors built in, which are used to transmit I²C protocol signals, SPI protocol signals or parallel interface protocol signals between the OLED digital display screen and the PCB board.

[0009] A method for connecting an OLED digital display screen to a PCB board includes the following steps: (1) Surface mount the female connector onto the PCB board; (2) Rotate the locking plate on the connecting female to open it; (3) Insert the FFC flexible flat cable that comes with the OLED digital display screen into the slot of the connector; (4) Reset the locking plate and rotate it to close, so that the FFC flexible cable is pressed and locked.

[0010] Preferably, when disassembly is required, the locking plate is rotated open again to pull the FFC flexible flat cable out of the connector, thus achieving non-destructive disassembly.

[0011] As described above, the connection structure and method between an OLED digital display screen and a PCB board provided by the present invention have at least the following beneficial effects: Avoid the risk of screen breakage: By using FFC connectors, the OLED display does not need to be directly subjected to the high temperature of welding, which completely avoids the problem of screen breakage caused by welding. The connection is also firm and stable, preventing the display from breaking during molding or external force.

[0012] Secure and reliable connection: The FFC connector is equipped with a flip-type self-locking mechanism (front-opening / rear-opening). After the locking plate is closed, it can firmly fix the FFC flexible cable, effectively preventing loosening caused by product vibration. No additional glue is required for fixing, which saves process costs and reduces the use of adhesives.

[0013] Easy to assemble and repair: Insertion and removal are simple, the connection is stable after locking, and disassembly only requires opening the locking plate, without the need for welding or gluing, which greatly reduces the difficulty and cost of repair.

[0014] Improved production yield: Avoided problems such as high temperature defects and mechanical stress during the welding process, reducing rework costs and material waste caused by poor processing.

[0015] Slim and compact design: Utilizing a standard FFC connector, it features a compact design suitable for space-constrained portable electronic devices.

[0016] Flexible signal transmission methods: Depending on the product's different requirements for display refresh rate and development complexity, communication protocols such as I²C, SPI, or parallel interface can be flexibly selected, which facilitates technology portability between different product platforms. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic plan view of the overall structure of the present invention.

[0019] Figure 2 A schematic diagram showing the connections between the steps of the method of the present invention.

[0020] In the diagram: 1. OLED digital display screen; 2. PCB board; 3. FFC flexible flat cable; 4. Connecting socket. Detailed Implementation

[0021] The following description, in conjunction with the implementation of this invention, is merely an example and illustration of the concept of this invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the inventive concept or exceed the scope defined in these claims, all of which should fall within the protection scope of this invention.

[0022] Example 1:

[0023] Please see Figure 1 As shown, this embodiment provides a connection structure between an OLED digital display screen and a PCB board, which is mainly used in digital display charger products.

[0024] In this structure, the connecting female connector 4 is specifically an FPC 0.5PH 2.0H flip-type 10-40P, which is surface-mounted and soldered onto the PCB board 2 using SMT technology. The thickness of the reinforcing plate at the plug end of the FFC flexible flat cable 3 of the OLED digital display screen 1 matches the slot of the connecting female connector 4 to ensure a stable connection after plugging in.

[0025] During assembly, the operator first rotates the front cover locking plate on the socket side of the connector 4 upwards to open it, creating a zero-insertion-force gap between the terminal and the slot. Then, the FFC flexible flat cable 3 of the OLED digital display screen 1 is inserted horizontally into the slot of the connector 4 until it reaches the bottom. Finally, the front cover locking plate is reset and pressed down to close. After the locking plate closes, its inner structure applies a uniform clamping force to the FFC flexible flat cable 3, establishing reliable electrical contact between the conductor of the FFC flexible flat cable 3 and the terminal assembly. At the same time, the snap-fit ​​structure on the locking plate fixes the locking plate in the closed position, achieving self-locking retention.

[0026] The driver IC of the OLED digital display screen 1 receives control commands and display data from the MCU on the PCB board 2 via the FFC flexible flat cable 3. The MCU communicates with the driver IC through the SPI interface, transmitting data such as voltage, current, and power to be displayed to the driver IC in real time and displaying it on the OLED screen.

[0027] When repair is needed, the operator only needs to turn the lock plate open to easily unplug the FFC flexible cable 3 and replace the display screen or perform repairs.

[0028] Example 2: Rear-hinged connecting female seat 4 scheme This embodiment is largely the same as the previous one, except that the connecting female 4 uses a rear-hinged connector. In this structure, the locking plate is located on the side of the connecting female 4 away from the socket (rear side), and the locking plate is rotated backward to open.

[0029] Compared to the front-opening design, the rear-hinged structure has a higher tendency to retain force, and the locking plate provides a more secure clamping of the FFC flexible flat cable 3 after closing. This makes it particularly suitable for applications where the product may be subject to significant vibration during use, such as car chargers and portable power banks. Because the locking plate is located at the rear, the operating space is more spacious when inserting the FFC flexible flat cable 3, facilitating the connection and insertion of automated equipment.

[0030] Example 3: I²C Communication Mode Scheme In this embodiment, the driver IC of the OLED digital display screen 1 is configured in I²C communication mode via the BS pin (BS0=GND, BS1=High, BS2=GND). The FFC flexible flat cable 3 uses only two signal lines to transmit SCL (serial clock) and SDA (serial data) respectively. This mode occupies the fewest FFC pins and is suitable for portable products with strict PCB layout requirements and relatively low display update frequencies.

[0031] Example 4: Parallel Interface Communication Scheme In this embodiment, the driver IC of the OLED digital display screen 1 is configured in 8-bit 6800 interface parallel mode, and the FFC flexible cable 3 is configured with 8 data lines (D0~D7), chip select line (CS), read / write control line (RD / WR), and other signal lines. Parallel mode can update the display content at a higher transmission rate, which is suitable for products that need to display dynamic waveforms, rapidly changing values, or high refresh rate applications in real time.

[0032] Comprehensive explanation of communication methods: Data and command transmission between the OLED digital display screen 1 and the PCB board 2 is achieved via an FFC flexible flat cable 3. The multiple flat copper conductors arranged side-by-side in the FFC cable 3 correspond to various signal pins of the OLED driver IC, including but not limited to: power lines (VCC, GND), data lines (SDA / DATA), clock lines (SCL / CLK), command / data select lines (DC), chip select lines (CS), and reset lines (RST). The driver IC selects the communication protocol through mode configuration pins (BS0, BS1, BS2).

[0033] The main control MCU on PCB 2 generates display data and commands according to the selected communication protocol and corresponding interface timing. These are then transmitted to the OLED driver IC via FFC flexible flat cable 3. Upon receiving the signals, the driver IC parses the commands and controls the on / off state of the OLED pixels to complete the information display. Electrically, the entire transmission path is: MCU I / O port signals → PCB 2 wiring → connection to terminal 4 of the connector → FFC flexible flat cable 3 conductor → OLED driver IC. This transmission path enables electrical connection and protocol layer communication between the MCU on PCB 2 and the OLED digital display screen driver IC.

[0034] It should be understood that in the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0035] It should be understood that determining B based on A does not mean determining B solely based on A; it also means determining B based on A and / or other information.

[0036] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0037] In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A connection structure between an OLED digital display screen and a PCB board, comprising an OLED digital display screen (1), a PCB board (2), and an FFC flexible flat cable (3), characterized in that: It also includes a female connector (4), which is mounted on the PCB board (2). The OLED digital display screen (1) is connected to the female connector (4) via its own FFC flexible cable (3), and the female connector (4) is provided with a flip-type self-locking mechanism.

2. The connection structure between the OLED digital display screen and the PCB board according to claim 1, characterized in that: The flip-type self-locking mechanism is a front-hinged locking plate or a rear-hinged locking plate. The locking plate is rotated open to allow the FFC flexible flat cable (3) to be inserted, and the locking plate is pressed down to close and press the FFC flexible flat cable (3) tightly and fix it.

3. The connection structure between the OLED digital display screen and the PCB board according to claim 1, characterized in that: The OLED digital display screen (1) is equipped with a driver IC, and the FFC flexible flat cable (3) has multiple parallel conductors built in, which are used to transmit I²C protocol signals, SPI protocol signals or parallel interface protocol signals between the OLED digital display screen (1) and the PCB board (2).

4. A method for connecting an OLED digital display screen to a PCB board, characterized in that... Includes the following steps: (1) Surface mount the female connector (4) onto the PCB board (2); (2) Rotate the locking plate on the connecting female seat (4) to open it; (3) Insert the FFC flexible flat cable (3) that comes with the OLED digital display screen (1) into the slot of the connector (4); (4) Reset the locking plate and rotate it to close, so that the FFC flexible cable (3) is pressed and locked.

5. The method for connecting the OLED digital display screen and the PCB board according to claim 4, characterized in that: When disassembly is required, rotate the locking plate open again and pull the FFC flexible cable (3) out of the connector (4) to achieve non-destructive disassembly.

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