Camera Module Optical Path Redirection for Compact OIS
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Solution Overview
Problem
Existing camera modules face challenges in reducing the size required for Optical Image Stabilization (OIS) operation, particularly in miniature low-power camera modules used in small electronic devices like smartphones.
Innovation Solution
The camera module incorporates a lens module, a first optical path changer with a tilted or rotated prism, and a second optical path changer with a planar prism, allowing for efficient space utilization and reduced size by changing the light path in multiple axes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional VCM technology is used in camera modules, then OIS functionality can be achieved, but the module size becomes too large for miniature low-power camera modules
Solution Approach 1:
The patent changes the light path direction from the conventional axial direction to a lateral direction using prisms. The first prism redirects light at a first angle and the second prism redirects it at a second angle, effectively moving the OIS operation to a different spatial dimension. This dimensional change allows compact integration while maintaining OIS functionality, resolving the contradiction between OIS capability and module size.
2Volume of moving object
If the camera module is designed for small electronic products like smartphones, then space is saved, but the module becomes susceptible to shocks and hand shaking
Solution Approach 1:
The patent implements preliminary anti-action by using the tilted prisms to pre-correct for hand shaking and shock effects. The first and second prisms are configured to change the light path in opposite directions to counteract the effects of hand shaking before the image reaches the sensor. This proactive compensation approach allows compact module design while protecting against vibration and shock harmful factors.
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 configuration effectively reduces the size of the camera module while maintaining OIS functionality, thereby addressing the space constraints in compact electronic devices.
Implementation Method 1
a first optical path changer, which includes an incident surface and an emitting surface and which reflects light introduced through the incident surface, toward the emitting surface
Implementation Method 2
a second optical path changer, which includes a first surface, which faces the emitting surface in an optical-axial direction of the lens module, and a second surface, which is disposed opposite the first surface
Data Source
AI summary
An embodiment comprises: a lens module; a first optical path change part including an incident surface and an emitting surface, and reflecting light, which is incident onto the incident surface, to emit the light via the emitting surface; and a second optical path change part including a first surface which faces the emitting surface in an optical axial direction of the lens module and a second surface which is an opposite surface to the first surface, wherein, in order to change the path of light emitted via the emitting surface, the first optical path change part is tilted or rotated about a first axis perpendicular to the optical axial direction, and, in order to change the path of light emitted from the second surface, the second optical path change part is tilted or rotated about a second axis perpendicular to the optical axial direction and the first axis.