Display Module FPC Layout for Narrow Bezel and Bonding Stability
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Solution Overview
Problem
Existing solutions to reduce the Y-dimension of FPC or PCB in display modules for large-size vehicle-mounted/PAD/NB products to accommodate large-capacity batteries result in uneven temperature distribution, increased thickness, and limited assembly space, leading to defects such as bonding issues and higher costs.
Innovation Solution
A display module design where the flexible circuit board is bent to the backlight side of the display panel and connected to the printed circuit board, with modified binding areas to increase the overlapping area, allowing for a narrower frame and increased assembly space by shortening the total length of the circuit boards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the Y-dimension of FPC or PCB is reduced to increase assembly space for large-capacity batteries, then the assembly space is improved, but the multi-layer board structure experiences uneven temperature distribution and poor uniformity resulting in bonding defects
Solution Approach 1:
The flexible circuit board is bent along the Y-direction to extend in the X-direction, changing the dimensional orientation of the board layout. This allows the board to accommodate battery assembly space requirements while maintaining adequate bonding area and uniform temperature distribution during the bonding process, avoiding bonding defects.
2Area of stationary object
If the Y-dimension of FPC or PCB is reduced to increase assembly space, then the assembly space is improved, but the thickness of FPC or PCB increases causing PNL warping after bonding
Solution Approach 1:
By bending the flexible circuit board along the Y-direction to extend in the X-direction, the design achieves increased assembly space without increasing board thickness. This dimensional reorientation prevents panel warping while providing sufficient space for large-capacity battery installation.
3Adaptability or versatility
If components are arranged on the surface of FPC/PCB requiring certain arrangement space, then the functionality is improved, but the Y-direction size of FPC or PCB is limited
Solution Approach 1:
The flexible circuit board is bent to extend primarily in the X-direction rather than the Y-direction, allowing components to be arranged along the extended X-direction. This reorientation provides sufficient component arrangement space while minimizing the Y-direction size to maximize battery assembly space.
Data Source
AI summary
A display module is provided, including a display panel, a flexible circuit board and a printed circuit board, wherein the flexible circuit board is connected to an end of the display panel along a first direction, and the flexible circuit board is bent to the backlight side of the display panel to be bound and connected with the printed circuit board, the flexible circuit board includes a first binding area for binding and connecting with the printed circuit board, and a first area adjacent to the first binding area in the first direction, the orthographic projection of the first area in a second direction is located on the printed circuit board, and the second direction is a direction perpendicular to the light emitting surface of the display panel. The present disclosure also relates to a display device.