Camera Module Cushioning for Mobile Phone Shock Protection
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Solution Overview
Problem
Traditional camera modules in mobile phones are prone to breakage due to harsh handling, which causes vibrations and impacts to be transmitted through the frame and outer cover, leading to potential damage of the optical unit and solder connections between the solid state imaging device and the mounting board, and the small size of WLCSP devices results in insufficient attachment strength.
Innovation Solution
A camera module is attached to the outer cover through a cushion that absorbs vibrations and impacts, with the solid state imaging device and optical unit isolated from direct contact with the outer cover, and the mounting board connected to other electronic components via flexible wiring to prevent shock transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the solid state imaging device is made small using WLCSP packaging, then the device size is reduced, but the attachment strength between the solid state imaging device and the optical unit becomes insufficient to endure vibration or impact
Solution Approach 1:
The camera module is divided into separate components (solid state imaging device, optical unit, mounting board) that are independently positioned and attached to the outer cover through cushions, allowing each component to be optimized for its specific function while maintaining overall compactness
Solution Approach 2:
Cushions are introduced as intermediary elements between the camera module components and the outer cover to absorb vibration and impact, protecting the small WLCSP device without requiring increased attachment strength from the device itself
2Stability of the object's composition
If the camera module is rigidly attached to the frame through the outer cover, then structural stability is improved, but the camera module becomes vulnerable to breakage from vibration and impact transmitted through the frame
Solution Approach 1:
Cushions are pre-installed between the camera module and the outer cover to absorb vibration and impact before these forces can reach the camera module components, protecting them in advance against damage from rough handling
Solution Approach 2:
Flexible wiring is used to connect the mounting board to other electronic components, allowing the connection to flex and absorb vibration and impact while maintaining electrical connectivity, thus protecting the camera module from shock transmission
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The cushioning system effectively absorbs shocks and vibrations, protecting the camera module from damage, and the flexible wiring ensures that vibrations are not transmitted to the camera module, enhancing its durability and preventing breakage during impacts.
Implementation Method 1
a camera module is attached to an outer cover through a cushion... the cushion is provided between a mounting board on which a solid state imaging device is mounted and the outer cover
Data Source
AI summary
A mounting board of a camera module of a mobile phone is screwed to an outer cover through cushions formed of rubber, sponge or the like. A solid state imaging device and an optical unit of the camera module are contained in an opening formed in the outer cover and do not contact the outer cover. The mounting board is connected to a main substrate through a flexible board. Accordingly, even if the mobile phone is dropped down, the camera module is prevented from breakage by the vibration or the shock applied to the mobile phone, because the vibration and the shock are not transmitted to the camera module directly.