Display Module Housing Layout for Sealed Flex Board Routing
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Solution Overview
Problem
Existing in-vehicle display modules suffer from poor waterproof and dustproof performance due to gaps formed during assembly, leading to potential water and dust ingress, which can cause short circuits and reduce product lifespan, while also increasing manufacturing costs and production variability.
Innovation Solution
A display module design featuring a housing with a backplane and side plate forming a space for the display panel, incorporating a hollow for the flexible circuit board to pass through and connect to a driving circuit board, and a cover plate connected to the side plate via a connection portion, creating an enclosed structure for enhanced sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If components are assembled in pairs to form a display module, then assembly efficiency is improved, but gaps are formed at assembly positions resulting in poor waterproof and dustproof performance
Solution Approach 1:
The flexible circuit board is nested within the hollow cavity of the backplane, allowing it to pass through the housing structure without creating external gaps. The circuit board connects the display panel to the driving circuit board while remaining contained within the sealed housing space, thus maintaining waterproof and dustproof performance while enabling efficient assembly.
Solution Approach 2:
The hollow cavity in the backplane serves as an intermediary structure that facilitates the passage of the flexible circuit board through the housing. This intermediary design allows electrical connections to be made without compromising the sealing integrity of the housing, resolving the contradiction between assembly efficiency and environmental protection.
2Reliability
If gap control is strictly enforced during production to prevent water and dust ingress, then waterproof and dustproof performance is improved, but manufacturing costs increase and production fluctuation is large
Solution Approach 1:
The hollow cavity is pre-formed in the backplane during housing manufacturing, before the assembly process. This preliminary action eliminates the need for post-assembly gap control measures, reducing manufacturing complexity and cost while ensuring consistent waterproof and dustproof performance across production batches.
Solution Approach 2:
The flexible circuit board is extracted from the traditional external connection method and routed through the internal hollow cavity of the backplane. This extraction of the connection path from the external assembly interface to the internal housing structure eliminates gap formation at assembly positions, improving reliability without increasing manufacturing difficulty.
3Reliability
If the flexible circuit board is routed externally to connect the display panel and driving circuit board, then electrical connection is achieved, but assembly gaps are created reducing sealing performance
Solution Approach 1:
The flexible circuit board is nested within the hollow cavity of the backplane, concealing the electrical connection path within the sealed housing structure. This nesting approach maintains reliable electrical connectivity between the display panel and driving circuit board while preventing water and dust from accessing the connection interface.
Data Source
AI summary
A display module, manufacturing method of display module, and terminal are provided. Display module includes housing, display panel in housing, cover plate located at side of light-emitting surface of display panel, flexible circuit board, and driving circuit board. Housing includes backplane and side plate. Backplane and side plate define space for accommodating display panel. End of flexible circuit board is electrically connected to display panel. Driving circuit board is located at side of backplane away from display panel. Backplane includes hollow located at side of side plate adjacent to display panel. Flexible circuit board passes through hollow and is electrically connected to driving circuit board. Cover plate is connected to side plate through connection portion. Manufacturing method of display module is used to manufacture foregoing display module. Terminal includes foregoing display module. Present disclosure can ensure assembly efficiency and display quality and improve waterproof and dustproof performance of module.