Camera Module Reflective Module Tilt Rotation
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Solution Overview
Problem
Camera modules in portable electronic devices face challenges in miniaturization due to the height of reflective members, which can degrade image quality based on assembly precision, and there is a need to reduce the thickness while maintaining image quality.
Innovation Solution
A camera module design featuring a housing with a reflective module that tilts and rotates about axes perpendicular to the optical axis, incorporating optical image stabilization and focus adjustment units, and a substrate configuration to minimize the thickness and assembly tolerance sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a reflective member is used to change the path of light, then the thickness of the camera module is reduced, but image quality degrades due to assembly precision requirements
Solution Approach 1:
The reflective member is made tiltable and rotatable about an axis perpendicular to the optical axis, allowing dynamic adjustment of its orientation. This enables the system to compensate for assembly tolerances and maintain optimal image quality while achieving reduced thickness through the folded optical path.
Solution Approach 2:
The orientation parameters of the reflective member (tilt angle and rotation angle) are made variable rather than fixed. By changing these parameters, the system can optimize the light path geometry to reduce thickness while compensating for manufacturing variations in assembly precision.
2Length of stationary object
If the reflective member is configured to change the path of light, then the camera module thickness is reduced, but image quality becomes sensitive to assembly tolerance
Solution Approach 1:
The reflective member's ability to tilt and rotate provides dynamic adjustment capability that compensates for assembly tolerances. This movement freedom allows the system to maintain reliable image quality despite variations in assembly precision by optimizing the light path geometry after assembly.
3Manufacturing precision
If the reflective module is made tiltable and rotatable, then assembly tolerance sensitivity is reduced, but device complexity increases
Solution Approach 1:
The reflective module incorporates tilt and rotation degrees of freedom with simple mechanical support structures. This dynamic design allows compensation for assembly tolerances through straightforward mechanical movements rather than complex adjustment mechanisms, reducing overall system complexity while improving tolerance robustness.
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 reduces the camera module's thickness, minimizes the impact of assembly tolerance on image quality, and maintains effective image stabilization and focus adjustment functions.
Implementation Method 1
a reflective module, tiltably disposed in the internal space, configured to reflect light passing through the lens module towards the image sensor
Implementation Method 2
An optical image stabilization unit including an optical image stabilization magnet may be disposed in the reflective module and an optical image stabilization coil is disposed in the housing to oppose the optical image stabilization magnet, and the optical image stabilization unit may be configured to rotate the reflective module about the axis perpendicular to the optical axis
Implementation Method 3
A focus adjustment unit including a focus adjustment magnet may be disposed in the lens module and a focus adjustment coil may be disposed in the housing to oppose the focus adjustment magnet, and the focus adjustment unit may be configured to move the lens module in the direction of the optical axis
Data Source
AI summary
A camera module includes a housing having an internal space; a lens module, disposed in the internal space, including at least one lens arranged in a direction of an optical axis; an image sensor, disposed in the housing, configured to have an imaging surface oriented in a direction intersecting the direction of the optical axis; and a reflective module, tiltably disposed in the internal space, configured to reflect light passing through the lens module towards the image sensor, and rotatably tilt about an axis perpendicular to the optical axis.