Lens Module Protrusion for OIS Movement Range
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Solution Overview
Problem
Conventional lens modules have a limited space between the lens unit and other optical elements, constraining the movement range and affecting the performance of Optical Image Stabilization (OIS) functionality.
Innovation Solution
The lens module design modifies the lens barrel shape to allow the lens to protrude, increasing the space between the lens unit and the optical turning unit, enabling a larger movement range for both units and enhancing OIS performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the lens barrel structure is conventional (lens contained within), then the structure is compact and simple, but the space between the lens unit and optical turning unit is small, constraining movement range
Solution Approach 1:
The lens is designed to protrude from the lens barrel along the optical axis direction, utilizing the axial dimension to increase the space between the lens unit and optical turning unit. This dimensional change allows the lens to extend beyond the conventional barrel boundary, creating additional movement space without increasing the lateral footprint of the device.
Solution Approach 2:
Instead of containing the lens entirely within the lens barrel as in conventional designs, the invention inverts the relationship by allowing the lens to protrude outward from the barrel. This inversion of the containment principle creates the necessary space for improved optical image stabilization movement while maintaining structural integrity.
2Reliability
If the space between lens unit and optical turning unit is small, then the device structure is compact, but the movement range of lens unit is constrained, affecting OIS performance
Solution Approach 1:
The lens protrusion along the optical axis creates additional space in the axial direction between the lens unit and optical turning unit. This dimensional exploitation allows sufficient movement range for OIS operation without increasing the overall device volume in lateral dimensions, thus improving reliability while controlling the volume parameter.
3Length of moving object
If the lens protrudes from the lens barrel, then the movement range of lens unit increases, but the lens barrel structure becomes more complex
Solution Approach 1:
The lens barrel is divided into a main body portion and a protruding portion that accommodates the lens. This segmentation allows the lens to extend beyond the main barrel while maintaining a structured and organized design. The divided structure manages the complexity by creating distinct functional zones rather than a monolithic complex structure.
Solution Approach 2:
The lens protrusion utilizes the axial dimension to increase movement range without proportionally increasing structural complexity. By extending in the optical axis direction rather than laterally, the design achieves greater length of movement with relatively simple structural modifications to the lens barrel.
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 enhances the movement range of the lens and optical turning units, thereby improving the performance of the Optical Image Stabilization function by providing a larger space for movement, thus improving image stabilization capabilities.
Implementation Method 1
A light beam travelling in a first direction is reflected by the reflecting surface for changing an optical path thereof
Data Source
AI summary
A lens module includes an optical turning unit and a lens unit. The optical turning unit includes a reflecting surface. The lens unit includes a lens barrel and a lens constituting an optical axis, and the lens barrel includes a first end portion adjacent to the optical turning unit. The reflecting surface and the optical axis meet at an intersection point, a distance from the intersection point to the lens is a fourth length, a distance from the intersection point to the first end portion is a fifth length, and a normal line of the reflecting surface is sloped at a first angle with respect to the optical axis. The lens module satisfies: 0.8<tan (α)×A′/B′<1, α is the first angle, A′ is the fourth length, and B′ is the fifth length.