Image Sensor Substrate Layout for 3-Axis OIS and AF Motion
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Solution Overview
Problem
Conventional camera shake correction modules have limitations in correcting various types of camera shake, particularly due to the complexity of the spring structure required for Optical Image Stabilization (OIS) and Auto Focus (AF) functions, which complicates the camera module design and manufacturing process.
Innovation Solution
An image sensor substrate with a novel lead pattern design that allows for relative movement of the image sensor with respect to the lens barrel in X-axis, Y-axis, and Z-axis directions, simplifying the spring structure and enabling enhanced camera shake correction by moving the image sensor instead of the lens barrel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional spring structure is used for OIS and AF functions, then the camera module can achieve focus adjustment and image stabilization, but the structure becomes complex and the manufacturing process is complicated
Solution Approach 1:
The patent extracts the image sensor from the rigid substrate and mounts it on a separate movable substrate that can independently move in X, Y, and Z directions. This separation removes the complex spring structure from the overall system by allowing the image sensor substrate itself to provide the necessary movement capability through its flexible connection to the lens barrel, thereby simplifying the manufacturing process while maintaining OIS and AF functions
Solution Approach 2:
The patent introduces dynamic movement capability to the image sensor substrate by enabling it to move flexibly in three directions (X, Y, Z) relative to the lens barrel. This dynamic design replaces the complex multi-component spring structure with a more straightforward flexible substrate mechanism that achieves the same image stabilization and focus adjustment functions
2Adaptability or versatility
If the image sensor is made movable with respect to the lens barrel, then camera shake correction capabilities are enhanced, but the camera module structure becomes more complex
Solution Approach 1:
The patent makes the image sensor substrate multi-functional by enabling it to perform both Auto Focus (Z-axis movement) and Optical Image Stabilization (X and Y-axis movement) functions simultaneously. This universal design allows a single movable substrate structure to replace what would traditionally require separate mechanisms for each function, thereby enhancing camera shake correction capabilities without proportionally increasing structural complexity
Solution Approach 2:
Instead of moving the lens barrel to achieve image stabilization and focus adjustment (conventional approach), the patent inverts the approach by moving the image sensor relative to the lens barrel. This inversion simplifies the overall structure by eliminating the need for complex lens barrel movement mechanisms while achieving the same or enhanced stabilization effects
3Reliability
If a complex spring structure is used for AF and OIS, then focus and stabilization functions are achieved, but the total height of the camera device increases
Solution Approach 1:
The patent employs a nested structure where the movable image sensor substrate is integrated within the compact space between the lens barrel and the circuit board. By nesting the movement mechanism within the existing camera module volume rather than adding external components, the design achieves focus adjustment capability while minimizing the total height of the camera device
Data Source
AI summary
An image sensor substrate includes an insulating layer including a first open region; and a first lead pattern part disposed on the insulating layer. The first lead pattern part includes: a first pattern part disposed on the insulating layer; a connection portion extending from the first pattern part; and a second pattern part connected to the first pattern part through the connection portion. The second pattern part and the connection portion are disposed to fly on a region not overlapped with the insulating layer in a vertical direction.