Folded Camera Module Lens Actuation Assembly
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Solution Overview
Problem
The existing folded camera module design faces challenges in assembling the lens actuation sub-assembly, as it interferes with the reflecting member and image sensor when attempted to be attached from the optical axis direction, leading to instability and insufficient thrust during lens actuation.
Innovation Solution
The camera module design includes a reflecting element, a driven body with a lens group, a housing with specific sections for the reflecting element and driven body, and a drive unit with a hole, allowing for stable assembly and operation by enabling the lens group to be driven in a stable manner and exerting a large thrust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the lens actuation sub-assembly is attached from the optical axis direction, then the assembly process is simple, but the lens actuation sub-assembly interferes with the reflecting member and image sensor
Solution Approach 1:
The patent changes the attachment direction from the optical axis direction to a direction perpendicular to the optical axis. This dimensional change allows the lens actuation sub-assembly to be attached without interfering with the reflecting member and image sensor, while still enabling simple assembly through the opening in the housing
2Object-affected harmful factors
If the lens actuation sub-assembly is attached from a direction perpendicular to the optical axis direction, then interference with other components is avoided, but it becomes difficult to dispose the voice coil motor on four surfaces
Solution Approach 1:
The patent divides the housing into multiple sections: a first housing section for the reflecting member, a second housing section for the lens actuation sub-assembly, and a third housing section for the image sensor. This segmentation allows the voice coil motor to be disposed on the fourth surface of the lens actuation sub-assembly without interfering with other components, while maintaining perpendicular attachment direction
3Device complexity
If the voice coil motor is provided only on one surface of the lens actuation sub-assembly, then the structure is simple, but the thrust for driving the lens actuation sub-assembly is insufficient
Solution Approach 1:
The patent merges the voice coil motor with the housing structure by providing the motor on the fourth surface of the lens actuation sub-assembly, which is integrated into the housing. This allows the motor to generate sufficient thrust in multiple directions while maintaining structural simplicity through integration
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 design facilitates easy assembly, stable lens group driving, and the generation of a large thrust, addressing the limitations of the existing folded camera module designs.
Implementation Method 1
The lens actuation sub-assembly is moved in the Y-Z plane by a voice coil motor provided on one surface thereof
Data Source
AI summary
A camera module comprises a reflecting element configured to reflect first light incident along a first optical axis and to discharge second light along a second optical axis; driven body including a lens group disposed on the second optical axis; a housing including: a first housing section having a first hollow space housing the reflecting element; a second housing section having a second hollow space housing the driven body, the second hollow space having an opening that is open in a perpendicular direction that is perpendicular to the second optical axis; and a drive unit having a hole; a holder including: a first portion housed in the second hollow space to hold the driven body; and a second portion inserted in the hole to be driven by the drive unit; and a cover configured to cover the opening.