Camera Actuator Boss Structure for Compact Dual-Axis OIS
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Solution Overview
Problem
Existing camera modules face challenges in achieving ultra-thin, ultra-small, and high-resolution designs due to limited space for optical image stabilizers (OIS) and increased lens size requirements, which affect light reception and image stabilization performance.
Innovation Solution
A camera actuator design featuring a housing with a mover and a driving unit that includes bosses and holes for precise tilting and rotating mechanisms, utilizing a driving magnet and coil system to enable X-axis and Y-axis tilting without magnetic interference, allowing for efficient OIS operation in a compact form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels is increased to improve resolution, then image quality is improved, but the pixel size is reduced which decreases light reception quantity
Solution Approach 1:
The patent introduces optical path length as a third dimension to compensate for reduced pixel area. By extending the optical path through additional lens groups and adjustable tilting mechanisms, the system maintains effective light collection despite smaller pixel dimensions, resolving the trade-off between resolution and light reception.
2Reliability
If OIS function is added to correct image shaking, then image stabilization is improved, but additional space is required around the lens for tilting or moving
Solution Approach 1:
The patent combines the OIS tilting mechanism with the existing lens assembly structure. The lens unit is integrated with tilting capabilities, allowing the OIS function to be achieved within the original spatial envelope rather than requiring separate space for additional tilting mechanisms.
Solution Approach 2:
The patent implements dynamic tilting of the lens unit around the optical axis to achieve OIS. The lens can be tilted in real-time based on detected image shaking, allowing the system to adapt to motion conditions while maintaining a compact form factor through controlled dynamic movement rather than fixed additional space.
3Illumination intensity
If lens size is increased to increase quantity of received light, then light reception is improved, but the space occupied by the actuator for OIS is exceeded
Solution Approach 1:
The patent resolves the space conflict by utilizing the tilting dimension. Instead of simply increasing lens diameter in the radial direction, the system tilts the lens unit to adjust the optical path, effectively using angular space to compensate for limited radial space while maintaining adequate light collection area.
4Reliability
If actuator for OIS is disposed near the lens, then image stabilization is achieved, but magnetic interference with auto focusing and zooming functions occurs
Solution Approach 1:
The patent extracts the OIS actuator from the immediate proximity of the lens assembly and positions it separately. By removing the source of magnetic interference from the critical optical and electronic environment, the system achieves OIS functionality without compromising auto-focusing or zooming operations through magnetic coupling.
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 enables stable optical image stabilization with minimal size increase, ensuring sufficient light reception and easy assembly, while avoiding magnetic interference with auto focusing and zooming functions.
Implementation Method 1
a driving unit that is disposed in the housing and rotates the mover in a first direction or a second direction perpendicular to the first direction
Data Source
AI summary
An embodiment of the present invention discloses a camera actuator comprising: a housing; a mover disposed in the housing and including protrusions on one surface which protrude toward the housing; and a driving unit disposed in the housing and rotating the mover on the basis of a first direction or a second direction perpendicular to the first direction, wherein the protrusions comprise: a first protrusion disposed on the one surface; a second protrusion spaced apart from the first protrusion; and a third protrusion separated from the first protrusion by a distance greater than from the second protrusion, and wherein the housing comprises: a groove in which the first protrusion is seated on an inner surface corresponding to the one surface; a first hole through which the second protrusion passes; and a second hole through which the third protrusion passes, wherein a side surface of the second protrusion is spaced apart from the first hole, and the housing includes a protruding part disposed on a side of the second hole and extending toward the third protrusion.