Camera Module Reflective Prism for Compact Zoom
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Solution Overview
Problem
Camera modules in mobile devices face challenges in achieving high zoom magnification without increasing the camera's length, as longer total track lengths are required, leading to larger camera sizes.
Innovation Solution
A camera module design incorporating a reflective module with at least two reflective surfaces at different angles, a carrier, and ball members to support movement, allowing for adjustable optical paths and enabling both autofocusing and optical image stabilization while maintaining a compact size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a reflector such as a prism is used to change the light path by about 90 degrees to implement a relatively long total track length, then the zoom magnification can be increased, but the length of the camera module increases
Solution Approach 1:
The patent employs a reflective member (prism) to fold the optical path, changing the light transmission direction by approximately 90 degrees. This dimensional change in the optical path allows the total track length to be extended without proportionally increasing the camera module's external length, thereby resolving the contradiction between achieving high zoom magnification and maintaining a compact camera size.
2Productivity
If the total track length is increased to achieve high zoom magnification, then the zoom performance is improved, but the camera module size becomes larger
Solution Approach 1:
By introducing a reflective member that folds the optical path at approximately 90 degrees, the patent extends the total track length in a folded configuration rather than a linear arrangement. This allows the optical system to achieve the required total track length for high zoom magnification while minimizing the camera module's external dimensions and volume.
3Productivity
If a reflective member is added to change the light path, then the optical path can be optimized for zoom, but the device complexity increases
Solution Approach 1:
The patent integrates the reflective member (prism) into the camera module housing, merging the light-path-folding function with the structural housing. This integration approach optimizes the optical path for zoom magnification while minimizing the increase in device complexity by combining multiple functions into a unified structure rather than adding separate independent components.
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 allows for high zoom magnification with reduced camera size by optimizing the movement of reflective and lens modules, enhancing image quality and stabilization functions.
Implementation Method 1
a reflective member including at least two reflective surfaces disposed at different angles and configured to reflect light passing through the first lens module
Implementation Method 2
The ball member may maintain contact with each of the carrier and the reflective member by magnetic attractive force between the first magnet and the first yoke
Data Source
AI summary
A camera module includes: a first lens module disposed in a housing; and a reflective module. The reflective module includes: a reflective member including at least two reflective surfaces disposed at different angles and configured to reflect light passing through the first lens module; and a carrier disposed between the reflective member and the housing. The cameral module further includes an image sensor configured to collect light reflected from the reflective module. The reflective member is configured to move in a first direction with respect to the carrier, and the carrier is configured to move in a second direction perpendicular to the first direction with respect to the housing.