Display module for improving differential impedance stability and electronic equipment

Abstract

The utility model discloses a display module and an electronic device for improving differential impedance stability, the display module comprises a module FPC, the module FPC is a double-layer FPC, an additional layer is additionally arranged at the area where a signal line of the module FPC penetrates through a differential impedance line, the additional layer comprises an additional covering layer and an additional copper layer which are arranged in a stacked mode, and the additional covering layer and the additional copper layer are arranged in a stacked mode. And the additional covering layer is closer to the module FPC relative to the additional copper layer. According to the utility model, the TPI layer and the copper layer with the same specification are additionally arranged at the position where the signal line of the module FPC of the display module is inserted into the impedance line, so that a local three-layer stacking mode is formed, an impedance reference layer at the position is continued, the impedance value problem and the signal transmission quality are ensured, and the display effect and quality of the display module and resistance equipment are favorably improved.

Description

Technical Field

[0001] This utility model relates to the field of display module technology, and in particular to a display module and electronic device that improves differential impedance stability. Background Technology

[0002] Currently, most display modules use double-layer FPCs. In this double-layer stacked structure, it is inevitable that other signal lines will pass through differential impedance lines. At the point where the signal lines pass through the impedance lines, the impedance reference layer will break, causing the differential characteristic impedance value to fluctuate and become unstable, which in turn affects the signal transmission quality and display effect.

[0003] Therefore, existing technologies have shortcomings and need to be improved. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a display module and electronic device that improves the stability of differential impedance.

[0005] The technical solution of this utility model is as follows: This utility model provides a display module that improves the stability of differential impedance, including: a module FPC, the module FPC is a double-layer FPC, an additional layer is added at the area where the signal lines of the module FPC intersect the differential impedance lines, the additional layer includes an additional cover layer and an additional copper layer stacked together, and the additional cover layer is closer to the module FPC than the additional copper layer.

[0006] Furthermore, the material and thickness of the additional cover layer are the same as the substrate layer of the module FPC, and the material and thickness of the additional copper layer are the same as the circuit copper layer of the module FPC.

[0007] Furthermore, the display module also includes a liquid crystal module, and the module FPC is bonded and connected to the liquid crystal module.

[0008] Furthermore, the display module also includes a backlight module, which is stacked on the lower layer of the liquid crystal module.

[0009] This invention also provides an electronic device, which includes the above-mentioned display module for improving differential impedance stability.

[0010] The beneficial effects of this utility model by adopting the above solution are as follows: by adding a TPI layer and a copper layer of the same specification at the impedance line where the signal line of the FPC module of the display module passes through, a local three-layer stacked structure is formed, which continues the impedance reference layer at this position, ensuring the impedance value and signal transmission quality, and is conducive to improving the display effect and quality of the display module and resistive device. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a module FPC according to an embodiment of the present invention.

[0012] Figure 2 This is a cross-sectional schematic diagram showing the additional layer provided in a module FPC according to an embodiment of the present invention. Detailed Implementation

[0013] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] Please refer to the following: Figure 1 and Figure 2 In this embodiment, the present invention provides a display module for improving differential impedance stability, comprising: a module FPC 1, wherein the module FPC 1 is a double-layer FPC, including a substrate layer 6 and copper circuit layers 7 respectively stacked on both sides of the substrate layer 6, wherein the substrate layer 6 is made of TPI (thermoplastic polyimide). An additional layer 3 is added by lamination at the signal line intersecting differential impedance line region 2 on the front side of the module FPC 1, the additional layer 3 including an additional cover layer 5 and an additional copper layer 4 stacked, and the additional cover layer 5 is closer to the module FPC 1 than the additional copper layer 4.

[0015] Furthermore, the material and thickness of the additional cover layer 5 are the same as those of the substrate layer 6 of the module FPC 1, both being made of TPI. The material and thickness of the additional copper layer 4 are the same as those of the line copper layer 7 of the module FPC 1. This arrangement can achieve better impedance stability.

[0016] Furthermore, the display module also includes a liquid crystal module and a backlight module. The module FPC 1 is bonded to the liquid crystal module, and the backlight module is stacked on the lower layer of the liquid crystal module. In this case, the display module is a liquid crystal display module.

[0017] This invention also provides an electronic device, which includes the above-mentioned display module for improving differential impedance stability, and has better signal transmission quality, thereby improving the display effect.

[0018] In summary, this solution adds a TPI layer and a copper layer of the same specification at the impedance line intersection of the signal lines of the display module's FPC, creating a local three-layer stacked structure. This maintains the impedance reference layer at that location, ensuring impedance value and signal transmission quality, and is beneficial for improving the display effect and quality of the display module and resistive devices.

[0019] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A display module for improving differential impedance stability, characterized in that, include: The module FPC is a double-layer FPC. An additional layer is added at the region where the signal lines of the module FPC intersect the differential impedance lines. The additional layer includes an additional cover layer and an additional copper layer stacked together, and the additional cover layer is closer to the module FPC than the additional copper layer.

2. The display module for improving differential impedance stability according to claim 1, characterized in that, The material and thickness of the additional cover layer are the same as the substrate layer of the module FPC, and the material and thickness of the additional copper layer are the same as the circuit copper layer of the module FPC.

3. The display module for improving differential impedance stability according to claim 1 or 2, characterized in that, It also includes a liquid crystal module, wherein the module FPC is bonded and connected to the liquid crystal module.

4. The display module for improving differential impedance stability according to claim 3, characterized in that, It also includes a backlight module, which is stacked on the lower layer of the liquid crystal module.

5. An electronic device, characterized in that, The display module includes the differential impedance stability improvement as described in any one of claims 1 to 4.

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