Display Connector Layout With Shorter FPC Routing and Rear Access
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Solution Overview
Problem
The manufacturing cost of electronic devices is increased due to the use of long flexible printed circuit boards connecting displays to printed circuit boards, and there is a risk of connector damage or disengagement, which affects repairability and applies pressure on connectors.
Innovation Solution
The electronic device design includes a housing with a front plate, rear plate, and support members, where multiple flexible printed circuit boards connect the display to the main printed circuit board, reducing board length and manufacturing costs, and by positioning connectors on the rear surface, they are exposed for easier access and repair, with components like a speaker enclosure reducing pressure on connectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single flexible printed circuit board is used to connect the display and the printed circuit board, then the connection is simple, but the board length increases and manufacturing cost increases
Solution Approach 1:
The single flexible printed circuit board is divided into multiple flexible printed circuit boards. Each board connects specific components (display to intermediate PCB, intermediate PCB to main PCB), reducing the length of each individual board while maintaining the complete connection path.
2Length of moving object
If multiple flexible printed circuit boards are used to connect the display and the printed circuit board, then the board length is reduced, but connectors may be damaged or disengaged
Solution Approach 1:
A protective member is disposed between the connector and the rear plate to cushion and absorb external forces or impacts before they reach the connector. This prevents damage or disengagement of the connector while maintaining the benefits of multiple shorter flexible printed circuit boards.
3Ease of manufacture
If connectors are positioned on the front surface of the display, then the connection is straightforward, but repair requires removing the display
Solution Approach 1:
Instead of positioning the connector on the front surface of the display (conventional approach), the connector is positioned on the rear surface of the display. This inverted positioning allows the connector to be accessible from the rear of the device, enabling repair without removing the display assembly.
4Device complexity
If a long flexible printed circuit board is used, then the number of connectors is reduced, but manufacturing cost increases and repairability decreases
Solution Approach 1:
The long flexible printed circuit board is segmented into multiple shorter boards with intermediate connection points. This segmentation reduces manufacturing cost and improves repairability while managing the number of connectors through strategic placement and intermediate PCB connections.
Data Source
AI summary
An electronic device includes a housing including a front plate, a rear plate, a first support member, at least a portion of which is disposed between the front plate and the rear plate, and a second support member which faces the first support member, a display including a first display surface visually exposed to an exterior of the electronic device, and a second display surface which is opposite to the first display surface, a first connector mounted on the second display surface, a main printed circuit board disposed in the housing, and a first flexible printed circuit board connected to the main printed circuit board, where the first flexible printed circuit board includes a second connector facing the second support member and connected to the first connector.