Liquid Lens Camera Groove and Conductive Structure
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Solution Overview
Problem
Camera devices with liquid lenses face issues due to internal air pressure during active alignment and bonding, leading to alignment distortion and potential contamination from air vent holes, and require complex electrical connections for conductive structures.
Innovation Solution
A camera device design featuring a groove in the lens holder to facilitate gas escape during curing and an electrically conductive structure that connects the liquid lens to the substrate without soldering, using a conductive member and silver epoxy for reliable and stable electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the gap between the lens module and the lens barrel is completely sealed with an adhesive, then bonding strength is improved, but alignment distortion occurs due to trapped internal air pressure during curing
Solution Approach 1:
The patent applies the porous materials principle by intentionally leaving a vent hole (a porous/open structure) in the adhesive bonding line between the lens module and lens barrel. This vent hole allows trapped air to escape during adhesive curing, preventing alignment distortion while maintaining bonding strength. The vent hole is subsequently blocked with a blocking material to prevent foreign substance entry, thus resolving the contradiction between complete sealing for strength and air escape for precision.
2Manufacturing precision
If an air vent hole is formed in the active alignment bonding line, then air pressure escape is enabled, but foreign substances are introduced into the image sensor
Solution Approach 1:
The patent applies the preliminary action principle by blocking the vent hole with a blocking material after the adhesive curing process is complete. This preliminary blocking action prevents foreign substances from entering through the vent hole during subsequent handling and operation, while the vent hole has already served its purpose of allowing air escape during curing. This sequence of actions resolves the contradiction between enabling air escape and preventing contamination.
3Ease of operation
If the liquid lens is disposed spaced apart from the substrate, then electrical connection is enabled, but additional work such as soldering is required
Solution Approach 1:
The patent applies the merging principle by integrating the electrical connection function into the existing mechanical structure. The liquid lens is disposed spaced apart from the substrate, and an electrically conductive structure is formed between them, combining mechanical support and electrical connection functions. This eliminates the need for separate soldering processes and additional components, reducing device complexity while maintaining electrical connection capability.
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
This design prevents alignment distortion during curing, ensures reliable electrical connection of the liquid lens, and reduces the risk of contamination while simplifying the connection process and reducing heat-related issues, thereby enhancing the camera device's performance and reliability.
Implementation Method 1
an adhesive for coupling the lens holder and the base
Implementation Method 2
the groove may form a gas discharge path connecting the upper surface of the base to the lower surface of the liquid lens module
Implementation Method 3
a conductive member electrically connecting the liquid lens module and the substrate
Implementation Method 4
using a conductive member and silver epoxy for reliable and stable electrical connection
Data Source
AI summary
The present exemplary embodiment relates to a camera module comprising: a substrate; an image sensor disposed on the substrate; a base disposed on the substrate; a lens holder disposed on the base; a lens module disposed in the lens holder; a liquid lens module coupled to the lens module; and an adhesive for coupling the lens holder and the base, wherein the lens holder comprises a groove formed between the base and the liquid lens module.