A display module and electronic device

Abstract

This utility model belongs to the field of display technology and discloses a display module and electronic device. The display module includes a display screen and a main screen FPC. The main screen FPC includes a separately configured functional FPC and an adapter FPC. The first end of the functional FPC is aligned and bound to the display screen, and the second end of the functional FPC is electrically connected to the first end of the adapter FPC. The second end of the adapter FPC is used for electrical connection to the motherboard. The adapter FPC has multiple selectable sizes to allow the display screen to connect to main screen FPCs of different sizes. The functional FPC of this utility model has a fixed size, while the adapter FPC is customized according to project requirements, allowing for bulk procurement of functional FPCs and reducing costs. When a project changes, only the low-value adapter FPC needs to be switched. The display module, after binding the display screen and functional FPC, can be applied to other projects by connecting adapter FPCs of different sizes, avoiding the high-value display screen and functional FPC-based display module becoming stagnant inventory and reducing material stagnation losses.

Description

Technical Field

[0001] This utility model relates to the field of display technology, and more particularly to a display module and electronic device. Background Technology

[0002] With the rapid development of smart terminals, automotive electronics, wearable devices, and various consumer electronics products, the standardization and generalization requirements of LCD screens, as core components of human-computer interaction, are becoming increasingly prominent. To reduce development costs and shorten time-to-market, the industry generally adopts a "shared screen for multiple projects" strategy, where multiple different models of products share the same LCD screen specification.

[0003] To achieve drive control and signal transmission, the display screen must be pre-bonded with a flexible printed circuit board (FPC) at the production stage to complete electrical connections with the motherboard and other functional modules. However, due to differences in product appearance, overall stacking, and motherboard interface positions, even display screens of the same specifications require the bonding of FPCs of different lengths. These three lengths of FPCs are incompatible, resulting in three independent part numbers that cannot be consolidated for procurement, thus losing economies of scale and leading to high unit costs. More seriously, when a project experiences demand adjustments, sales declines, or product iterations, the corresponding specific length of FPC and / or display module becomes stagnant inventory, resulting in capital tied up and scrap losses. Utility Model Content

[0004] The purpose of this application is to provide a display module and electronic device that can reduce costs and mitigate the risk of stagnant inventory.

[0005] The technical solution provided in this application is as follows:

[0006] On the one hand, a display module is provided, including:

[0007] Display screen;

[0008] The main screen FPC includes a separate functional FPC and an adapter FPC. The first end of the functional FPC is aligned and bound to the display screen, and the second end of the functional FPC is electrically connected to the first end of the adapter FPC. The second end of the adapter FPC is used for electrical connection with the motherboard.

[0009] The adapter FPC has multiple optional sizes to allow the display screen to connect to the main screen FPC of different sizes.

[0010] In some embodiments, the functional FPC is mounted with an IC chip and at least one passive device selected from resistors, capacitors, and inductors.

[0011] In some implementations, the second end of the functional FPC is provided with a binding area;

[0012] The first end of the adapter FPC is aligned and bound to the binding area of ​​the functional FPC.

[0013] In some implementations, the binding area of ​​the functional FPC is elongated and is arranged along the width direction of the functional FPC;

[0014] The width direction of the functional FPC is the same as the width direction of the display screen.

[0015] In some embodiments, the second end of the functional FPC is provided with a first electrical connector;

[0016] The first end of the adapter FPC is provided with a second electrical connector;

[0017] The first electrical connector and the second electrical connector are detachably connected to realize the electrical connection between the functional FPC and the adapter FPC.

[0018] In some implementations, the second end of the adapter FPC is provided with a socket or connector for connection to the corresponding motherboard.

[0019] In some implementations, the adapter FPC is elongated.

[0020] The width of the adapter FPC is smaller than the width of the functional FPC.

[0021] In some implementations, the length of the transfer FPC is greater than the length of the functional FPC.

[0022] In some implementations, a backlight FPC is also included, with a first end of the backlight FPC electrically connected to the display screen and a second end of the backlight FPC electrically connected to the functional FPC.

[0023] On the other hand, an electronic device is also provided, including the display module described in any of the above embodiments.

[0024] The technical advantages of this application are as follows: Display modules, after being bound to functional FPCs, can be applied to different projects. The binding of functional FPCs and displays is done at the screen manufacturer, while the connection between adapter FPCs and functional FPCs can be done at the screen manufacturer or the OEM manufacturer. The functional FPC has a fixed size, while only the adapter FPC is customized to project requirements, allowing for bulk purchasing of functional FPCs and reducing costs. When a project changes, only low-value adapter FPCs need to be switched or scrapped. Display modules, after binding displays and functional FPCs, can be applied to other projects by connecting adapter FPCs of different sizes, preventing high-value displays and functional FPCs from becoming stagnant inventory and reducing material losses due to stagnation. Attached Figure Description

[0025] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0026] Figure 1 This is a schematic diagram of the structure of a display module provided in an embodiment of this application;

[0027] Figure 2 These are schematic diagrams of the structures of three different specifications of adapter FPCs provided in the embodiments of this application;

[0028] Figure 3 This is a schematic diagram of a specification of a display module provided in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram of another specification of a display module provided in an embodiment of this application;

[0030] Figure 5 This is a schematic diagram of another specification of a display module provided in an embodiment of this application;

[0031] Figure 6 This is a partial structural schematic diagram of a display module provided in an embodiment of this application.

[0032] Explanation of icon numbers:

[0033] 100, Display screen; 200, Main screen FPC; 210, Functional FPC; 211, First electrical connector; 220, Adapter FPC; 221, Second electrical connector; 222, Connector; 300, Backlight FPC. Detailed Implementation

[0034] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application can also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the specific implementation methods of this application will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings and other implementation methods can be obtained based on these drawings without creative effort.

[0036] To keep the drawings concise, each drawing only schematically shows the parts relevant to this application, and they do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one."

[0037] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0038] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; or they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) are relative rather than absolute when describing the structure and movement of the various components, and are not intended to limit the direction of the product during actual use.

[0040] Furthermore, in the description of this application, ordinal numbers, such as "first" and "second," are used only to distinguish related objects and should not be construed as indicating or implying the relative importance or order between related objects.

[0041] like Figure 1As shown, in one or more embodiments, this disclosure provides a display module, including a display screen 100 and a main screen FPC 200; the main screen FPC 200 includes a separately configured functional FPC 210 and an adapter FPC 220, the first end of the functional FPC 210 is aligned and bound to the display screen 100, the second end of the functional FPC 210 is electrically connected to the first end of the adapter FPC 220, and the second end of the adapter FPC 220 is used for electrical connection to the motherboard; wherein, the adapter FPC 220 has multiple selectable sizes to enable the display screen 100 to connect to main screen FPCs 200 of different sizes.

[0042] Specifically, the edge of the display screen 100 is provided with a bonding area for bonding with the main screen FPC 200, the length of which is 8-15mm. The main screen FPC 200 includes a separately configured functional FPC 210 and an adapter FPC 220. The functional FPC 210 is mainly used to act as a signal bridge between the main screen FPC 200 and the adapter FPC 220. The adapter FPC 220 mainly serves as an adapter, and its length can be set according to project requirements to adapt to different projects. The FPC is a flexible printed circuit board, which is a highly reliable and extremely flexible printed circuit board made with polyimide or polyester film as the substrate. Its wires, pads, and components are all "printed" on the film, and then covered with a protective film to form a bendable, foldable, and rollable circuit board. FPCs have the characteristics of high wiring density, light weight, thinness, and good bending performance.

[0043] The first end of the functional FPC210 is the bonding end, which is bonded to the bonding area of ​​the display screen 100 to handle the output of drive / touch signals. The functional FPC210 can be mounted with IC chips and at least one passive device selected from resistors, capacitors, and inductors to achieve functions such as drive amplification and EMI suppression.

[0044] The second end of the functional FPC210 is electrically connected to the first end of the adapter FPC220. The second end of the adapter FPC220 is used for electrical connection with the motherboard of the electronic device to realize signal transmission, power supply, and function control between the motherboard of the electronic device and the display screen 100, thereby enabling the display screen 100 to be driven and powered by the motherboard. The adapter FPC220 can integrate backlight power supply, button, sensor, and other branch lines, allowing all signals to be transmitted through a single FPC. The adapter FPC220 and the functional FPC210 are separate structures. The size of the functional FPC210 is fixed, while the size of the adapter FPC220 can be customized according to actual project requirements, such as... Figure 2 As shown, Figure 2 There are three different sizes of FPC220 adapters available: FPC220-A, FPC220-B, and FPC220-C. Figures 3 to 5As shown, by connecting three different sizes of adapter FPC220-A, FPC220-B, and FPC220-C to the functional FPC210, three different display modules can be formed to solve the wiring length requirements caused by the stacking of electronic devices and different motherboard positions. In addition, the interfaces of the adapter FPC220 can also be different. The same display 100 can be adapted to multiple motherboards by simply switching between adapter FPC220s of different sizes or interfaces, avoiding the incompatibility between the display 100 and the functional FPC210 caused by changes in the overall BOM.

[0045] In this embodiment, the display module after the display screen 100 and the functional FPC 210 are bound together can be applied to multiple projects in the same series. The binding of the functional FPC 210 and the display screen 100 is done at the screen manufacturer, while the connection between the adapter FPC 220 and the functional FPC 210 can be done at either the screen manufacturer or the OEM manufacturer. The functional FPC 210 has a fixed size, while only the adapter FPC 220 is customized according to project requirements, allowing the functional FPC 210 to be purchased in bulk, reducing costs. When a project changes, only the low-value adapter FPC 220 needs to be switched or scrapped. The display module after the display screen 100 and the functional FPC 210 are bound together can be applied to other projects by connecting adapter FPCs 220 of different sizes, avoiding the high-value display module composed of the display screen 100 and the functional FPC 210 becoming stagnant inventory and reducing material stagnation losses.

[0046] Furthermore, such as Figure 6 As shown, the display module also includes a backlight FPC300. The first end of the backlight FPC300 is electrically connected to the display screen 100, and the second end is electrically connected to the functional FPC210. ​​The first end of the backlight FPC300 is soldered or thermocoupled to the backlight pads of the display screen 100, which are typically located at the lower edge of the glass. The second end of the backlight FPC300 is mated to the reserved pads or socket of the functional FPC210. ​​The backlight power supply and display signal share a single main screen FPC200 link, eliminating the need for additional wiring harnesses, reducing wires, saving space and cost, and achieving integrated power supply.

[0047] In some embodiments, the second end of the functional FPC 210 is provided with a bonding area; the first end of the adapter FPC 220 is aligned and bonded to the bonding area of ​​the functional FPC 210. The second end of the functional FPC 210 is provided with a rectangular gold finger area, which forms the bonding area of ​​the second end of the functional FPC 210. The bonding area of ​​the functional FPC 210 is elongated and is arranged along the width direction of the functional FPC 210; wherein, the width direction of the functional FPC 210 is the same as the width direction of the display screen 100, that is, the arrangement direction of the bonding area is consistent with the width direction of the display screen 100, simplifying alignment and reducing angular deviation. The gold fingers are evenly spaced along the elongated direction, and 30-34 pins can be arranged within a 10mm range, meeting the requirements for collinear transmission of signals, power, backlight, etc., without the need for secondary connectors.

[0048] Similarly, the first end of the adapter FPC220 is equipped with gold fingers of the same size to form the bonding area of ​​the adapter FPC220. The bonding area of ​​the adapter FPC220 is also elongated, and the gold fingers in the bonding area are evenly spaced along the elongated shape. The bonding areas of both the functional FPC210 and the adapter FPC220 are elongated. The elongated bonding surface increases the adhesive layer area, improves peel strength, and the stress is evenly released along the elongated shape when bending, reducing the risk of cracking of individual pins.

[0049] Preferably, reinforcing plates can be attached to the back of the bonding areas of the functional FPC210 and the adapter FPC220 respectively. The thickness of the reinforcing plates can be 0.2-0.3mm to form a rigid area, thereby ensuring the flatness during hot pressing.

[0050] During bonding, the gold fingers of the first end of the adapter FPC220 and the gold fingers of the second end of the functional FPC210 are placed face to face, with a strip of adhesive film sandwiched in between. Then, pre-pressure is applied by the bonding equipment to pre-cure the adhesive film and fix its position. After pre-pressure, the main pressure is applied to break the conductive particles and make them conduct in the vertical direction. The adhesive is then fully cured to bond the functional FPC210 and the adapter FPC220.

[0051] In this embodiment, the functional FPC210 and the adapter FPC220 are bonded together through a bonding process, which can reduce the thickness of the functional FPC210 and the adapter FPC220 after connection, so as to meet the requirements of narrow bezel or ultra-thin whole device; and after the functional FPC210 and the adapter FPC220 are bonded together, there is no loosening after plugging and unplugging, and the oxidation resistance and vibration resistance are good, which is suitable for automotive and wearable needs.

[0052] In some embodiments, such as Figure 1 As shown, the second end of the functional FPC210 is provided with a first electrical connector 211; the first end of the adapter FPC220 is provided with a second electrical connector 221; the first electrical connector 211 and the second electrical connector 221 are detachably connected to realize the electrical connection between the functional FPC210 and the adapter FPC220.

[0053] The first electrical connector 211 can be a male or female connector, for example, a board-to-board male or female connector with a 0.3mm-0.5mm pitch. The second electrical connector 221 is a female or male connector that is adapted to connect with the first electrical connector 211. The second electrical connector 221 and the first electrical connector 211 are electrically connected through mating. The functional FPC 210 and the adapter FPC 220 are electrically connected through the first electrical connector 211 and the second electrical connector 221. Compared with the bonded connection method, the connection method in this embodiment can be repeatedly disassembled and assembled. Project iterations only require replacing the adapter FPC 220, reducing the scrap rate of the high-value functional FPC 210 and the display screen 100.

[0054] Furthermore, reinforcing plates of 0.2mm-0.3mm can be installed in the area where the first electrical connector 211 is located on the functional FPC210 and in the area where the second electrical connector 221 is located on the adapter FPC220. During SMT mounting of the first and second electrical connectors 211 and 221, the reinforcing plates act as support surfaces, preventing the FPC from sagging and deforming during high-temperature reflow, improving mounting accuracy, ensuring the flatness of the connector pads, avoiding cold solder joints and ensuring signal integrity. In addition, the reinforcing plates can withstand the insertion and extraction forces during connector insertion and extraction, preventing warping or tearing of the gold fingers. Furthermore, the insertion and extraction forces are evenly distributed over a 10-15mm wide area through the reinforcing plates, reducing stress concentration on individual copper foils and improving solder joint fatigue life.

[0055] In some embodiments, such as Figure 1 As shown, the second end of the adapter FPC220 is provided with a socket or connector 222 for connection with the motherboard. In this embodiment, the second end of the adapter FPC220 is provided with a socket or connector 222, and the adapter FPC220 and the motherboard are connected through the socket or connector 222. At the OEM factory, only one plug and press is needed to complete the electrical connection between the adapter FPC220 and the motherboard, without the need for a cleanroom, laser welding, etc., which facilitates the electrical connection between the adapter FPC220 and the motherboard. The adapter FPC220 and the motherboard are connected in a pluggable manner, and the adapter FPC220 can be replaced separately during maintenance or project iteration, reducing the scrap rate of the display screen 100 and the functional FPC210, and reducing after-sales costs.

[0056] The size of the FPC220 adapter can be set according to the actual project requirements. The sockets or connectors 222 on different sizes of FPC220 adapters can be the same or different, so that the FPC220 adapter can be adapted to multiple motherboards of different models, improving the applicability of display modules and reducing material stagnation rate.

[0057] Similarly, a reinforcing plate is provided in the area where the socket or connector 222 is located at the second end of the FPC220 to ensure the flatness of the solder pads, avoid cold solder joints and poor soldering, ensure signal integrity, withstand the insertion and removal forces of the connector 222, and improve the fatigue life of the solder joints.

[0058] In some embodiments, such as Figure 1 As shown, the adapter FPC220 is elongated; the width of the adapter FPC220 is smaller than the width of the functional FPC210. ​​The length of the adapter FPC220 is greater than the length of the functional FPC210.

[0059] The functional FPC210 is short and wide. Its specific dimensions can be set according to the number of electronic components to be arranged; this embodiment does not impose a specific limitation. The adapter FPC220 is long and narrow. The adapter FPC220 can use double-sided copper foil, achieving the same number of channels (30-40 pins) using narrow-sided double-sided wiring. The length of the adapter FPC220 can be designed according to the overall project requirements. In this embodiment, the narrow and long shape of the adapter FPC220 facilitates its movement through gaps in the overall system, avoiding components such as batteries and speakers, thus simplifying the overall system layout.

[0060] This application also provides an embodiment of an electronic device, including a main unit housing, a motherboard, and a display module as described in any of the above embodiments. The structure of the display module is as follows: Figures 1 to 6 As shown. The display module is mounted on the main unit housing, and the adapter FPC220 of the display module is electrically connected to the motherboard. The assembly process of the electronic device can be as follows: ① The screen manufacturer completes the bonding and testing of the display-functional FPC-backlight FPC → ② The OEM inserts the adapter FPC → ③ The other end of the adapter FPC is inserted into the motherboard → ④ Locking screws → ⑤ The entire device is closed. In this embodiment, different projects only need to change the length of the adapter FPC220. The display 100 and functional FPC210 are shared, reducing the number of inventory part numbers from 3 to 1, thus minimizing the risk of material obsolescence.

[0061] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0062] It should be noted that the above embodiments can be freely combined as needed. The above description is only a preferred embodiment of this application. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A display module, characterized in that, include: Display screen; The main screen FPC includes a separate functional FPC and an adapter FPC. The first end of the functional FPC is aligned and bound to the display screen, and the second end of the functional FPC is electrically connected to the first end of the adapter FPC. The second end of the adapter FPC is used for electrical connection with the motherboard. The adapter FPC has multiple optional sizes to allow the display screen to connect to the main screen FPC of different sizes.

2. A display module according to claim 1, characterized in that, The functional FPC is equipped with an IC chip and at least one passive device selected from resistors, capacitors, and inductors.

3. A display module according to claim 1, characterized in that, The second end of the functional FPC is provided with a binding area; The first end of the adapter FPC is aligned and bound to the binding area of ​​the functional FPC.

4. A display module according to claim 3, characterized in that, The binding area of ​​the functional FPC is elongated and is set along the width direction of the functional FPC. The width direction of the functional FPC is the same as the width direction of the display screen.

5. A display module according to claim 1, characterized in that, The second end of the functional FPC is provided with a first electrical connector; The first end of the adapter FPC is provided with a second electrical connector; The first electrical connector and the second electrical connector are detachably connected to realize the electrical connection between the functional FPC and the adapter FPC.

6. A display module according to claim 1, characterized in that, The second end of the adapter FPC is provided with a socket or connector for connection to the corresponding motherboard.

7. A display module according to claim 1, characterized in that, The adapter FPC is elongated; The width of the adapter FPC is smaller than the width of the functional FPC.

8. A display module according to claim 7, characterized in that, The length of the adapter FPC is greater than the length of the functional FPC.

9. A display module according to claim 1, characterized in that, It also includes a backlight FPC, the first end of which is electrically connected to the display screen, and the second end of which is electrically connected to the functional FPC.

10. An electronic device, characterized in that, Includes the display module as described in any one of claims 1-9.

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