Periscope Camera Module Using Reflecting OIS to Cut Power
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Solution Overview
Problem
The increasing complexity and size of camera modules due to added functions such as auto-focusing and optical image stabilization leads to a larger size of portable electronic devices, and the movement of lenses and image sensors requires significant driving force and power consumption.
Innovation Solution
A camera module design with a reflecting module and lens module aligned perpendicular to the optical axis, utilizing a moving holder and carrier system with ball bearings and magnets for movement, allowing for auto-focusing and optical image stabilization without increasing device thickness, and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lenses and image sensors are directly moved for optical image stabilization, then stabilization function is achieved, but weight of moving parts increases and power consumption increases
Solution Approach 1:
A reflecting module is introduced as an intermediary element to achieve optical image stabilization. Instead of moving the heavy lens or image sensor, the reflecting module redirects light to the image sensor, achieving stabilization with minimal moving mass and reduced power consumption while maintaining the stabilization function
2Adaptability or versatility
If multiple functions (AF, OIS, zoom) are added to camera module, then functionality is improved, but device size and complexity increase
Solution Approach 1:
The reflecting module serves multiple functions simultaneously - it enables optical image stabilization through light redirection, supports auto-focusing by adjusting light path, and facilitates zoom functionality. By combining these functions into a single integrated module rather than separate mechanisms, the overall structural complexity is reduced while maintaining advanced camera capabilities
3Ease of operation
If lenses and image sensors are moved for auto-focusing, then focusing function is achieved, but driving force requirement increases
Solution Approach 1:
The reflecting module acts as a mediator that enables auto-focusing by adjusting the light path rather than physically moving the entire lens assembly or image sensor. This intermediary approach reduces the driving force requirement while maintaining the auto-focusing functionality
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 minimizes the thickness of portable electronic devices while maintaining advanced camera functions, reducing power consumption by moving a reflecting module rather than lenses or sensors, and enabling miniaturization.
Implementation Method 1
The carrier may include a first magnet configured to generate driving force in the optical axial direction in response to a coil disposed in the housing
Implementation Method 2
the first pulling yoke configured to allow the carrier to be supported by the bottom surface of the housing by attractive force between the first pulling yoke and the first magnet
Implementation Method 3
The second lens barrel may include a second magnet configured to generate driving force in the optical axial direction in response to a coil disposed in the housing
Implementation Method 4
the second pulling yoke allowing the second lens barrel to be supported by the bottom surface of the carrier by attractive force between the second pulling yoke and the second magnet
Data Source
AI summary
A camera module includes: a housing; a reflecting module; and a lens module disposed behind the reflecting module, wherein the moving holder is disposed to be movable in one axial direction, approximately perpendicular to the optical axial direction and the one axial direction with respect to the housing, the lens module includes a carrier supported by the housing to be linearly movable in approximately the optical axial direction, the lens module includes two or more lens barrels of which some are fixed, and the others are supported by the housing to be linearly movable in approximately the optical axial direction, and lenses are distributed and provided into the at least two lens barrels.