Camera Module Lens Barrel Segmented Adhesive Curing
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Solution Overview
Problem
Camera modules face challenges in maintaining focus due to adhesive curing, preventing lens array unit separation, and ensuring adhesive force between components, while also managing optical axis distortion and heat dissipation in compact, lightweight designs, particularly in wide-angle and low-light environments.
Innovation Solution
The camera module design includes a first lens barrel with a protrusion and a holder with a hole, using a ring-shaped adhesive member with spaced ends to prevent focus issues and separation, and additional adhesive members to enhance bonding between components, along with a reinforcement support structure to manage optical axis distortion and heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a continuous ring-shaped adhesive member is used to bond the lens barrel to the holder, then the adhesive force is maximized, but the adhesive member cannot be properly cured due to trapped air and heat, causing focus deviation
Solution Approach 1:
The continuous ring-shaped adhesive member is segmented into discontinuous portions with gaps between them. This segmentation allows air and heat to escape during the curing process, enabling proper curing while maintaining sufficient adhesive force. The gaps prevent the adhesive from forming a completely sealed ring, resolving the contradiction between maximizing adhesion and enabling proper curing.
2Measurement precision
If the lens array unit is made detachable for active alignment, then alignment precision is improved, but the risk of separation and focus deviation increases
Solution Approach 1:
The lens array unit is pre-aligned to the desired position before final bonding, and temporary adhesive members are used to maintain this alignment during the curing process. The discontinuous adhesive structure allows for preliminary alignment adjustments while providing sufficient bonding strength to prevent separation, thus achieving both alignment precision and reliability.
3Weight of moving object
If the camera module is designed to be compact and lightweight, then portability is improved, but heat dissipation becomes more difficult
Solution Approach 1:
The holder is designed with a thin-walled cylindrical structure that provides mechanical support while minimizing weight. The discontinuous adhesive rings create thermal pathways through the gaps, allowing heat to dissipate more effectively from the image sensor and lens barrel, thus achieving both lightweight design and improved heat dissipation.
Data Source
AI summary
An embodiment comprises: a lower surface; a first lens barrel comprising a first protrusion protruding from the lower surface; a first lens array comprising a plurality of first lenses disposed in the first lens barrel; a first holder comprising a first hole into which the first protrusion is inserted; a first adhesive member disposed between a lower surface of the first lens barrel around the first protrusion and an upper surface of the first holder around the first hole; and a first image sensor disposed under the first hole, wherein the first adhesive member comprises one end and the other end, which are disposed to encompass the first hole, and the one end and the other end of the first adhesive member are spaced apart from each other.