Lens Assembly Conductive Substrate for Reliable Camera Module Connectivity
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Solution Overview
Problem
Camera modules with contact pins suffer from electrical connectivity issues leading to auto focus numbness and potential damage during shock tests due to poor contact, complicating assembly and affecting performance.
Innovation Solution
A lens assembly using a conductive substrate with a body part and extension part, electrically connected to an optical module, facilitates easy assembly through FPCB technology and active alignment, ensuring reliable conductivity and optimal lens performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a contact pin is used to electrically connect the lens actuator, then electrical connectivity is achieved, but contact inferiority occurs leading to poor contact and auto focus numbness
Solution Approach 1:
The contact pin is extracted and replaced with a conductive adhesive layer directly integrated into the holder structure. This eliminates the separate contact pin component and its associated contact inferiority issues, providing reliable electrical connectivity between the lens actuator and the holder without relying on mechanical contact.
Solution Approach 2:
The electrical connection function is merged into the holder structure through the conductive adhesive layer. Instead of having a separate contact pin for electrical connection, the holder itself provides both mechanical support and electrical conductivity, combining multiple functions into a single integrated component.
2Reliability
If a contact pin is used for electrical connection, then connectivity is established, but the camera module is vulnerable to destruction during shock tests
Solution Approach 1:
The fragile contact pin is removed from the design and replaced with a conductive adhesive layer that is part of the holder structure. This eliminates the vulnerable mechanical contact point that could break during shock tests, while maintaining electrical connectivity through the adhesive's conductive properties.
Solution Approach 2:
The conductive adhesive layer serves as an intermediary between the lens actuator and the holder, providing both mechanical bonding and electrical conductivity. This intermediary layer is more resilient than a contact pin and can withstand shock conditions while maintaining electrical connection.
3Ease of manufacture
If traditional assembly methods are used, then manufacturing is possible, but assembly is complicated and time-consuming
Solution Approach 1:
Multiple functions are merged into the holder structure: mechanical support, electrical conductivity (via conductive adhesive layer), and positioning. This integration simplifies the overall assembly process by reducing the number of separate components that need to be assembled, thereby decreasing assembly time.
Solution Approach 2:
The conductive adhesive layer is applied in advance during holder manufacturing or as a pre-assembly step, eliminating the need for separate contact pin installation. This preliminary preparation simplifies the final assembly process and reduces the time required for complete assembly.
Data Source
AI summary
A lens assembly can include: a holder; a lens module disposed at an inner side of the holder; an optical module disposed at an upper side of the lens module; and an conductive substrate electrically connected to the optical module. The conductive substrate includes: a body part disposed at an upper side of the holder; and an extension part extended from one end of the body part, and including a terminal part, the holder includes a second lateral surface formed by being recessed inwards from a portion of a first lateral surface, and at least a portion of the extension part is disposed at the second lateral surface.