Image Sensor Substrate Structure for Stable OIS and AF Motion
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Solution Overview
Problem
Existing camera devices require complex spring structures and numerous elastic members to move lens barrels for focus and shake compensation, leading to increased assembly complexity and difficulty in tilt correction.
Innovation Solution
A substrate for an image sensor with a novel structure that allows movement in X, Y, and Z axes, incorporating a spring plate with an elastic member, insulating layer, and conductive pattern portion, including an extension pattern part with a length 1.5 to 4 times the linear distance between lead pattern parts, formed from copper-based alloys, to simplify the spring structure and enable auto focus and shake compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lens barrel is moved for focus and shake compensation, then the camera device can provide focus compensation and shake compensation, but the structure becomes complicated with multiple elastic members and assembly steps increase
Solution Approach 1:
Instead of moving the lens barrel as in conventional designs, this patent moves the image sensor in the opposite direction to achieve the same optical compensation effect. This inversion simplifies the mechanical structure by eliminating the need for complex spring assemblies and multiple elastic members, while maintaining focus compensation and shake compensation functionality
Solution Approach 2:
The patent extracts and eliminates the complex spring structure from the system by using an alternative approach - moving the image sensor on a substrate rather than moving the lens barrel. This removal of unnecessary components reduces device complexity and assembly steps while preserving the essential compensation functions
2Stability of the object's composition
If multiple elastic members are used to move the lens barrel, then the camera device can achieve stable movement, but the number of assembling steps increases
Solution Approach 1:
The patent combines multiple functions (focus compensation and shake compensation) into a single integrated substrate that moves the image sensor. This merging eliminates the need for multiple separate elastic members and reduces the number of assembly steps, while maintaining stable movement through the unified substrate structure
3Adaptability or versatility
If the lens barrel structure is used for movement, then the camera device can provide auto focus function, but tilt correction becomes difficult
Solution Approach 1:
By inverting the movement approach and moving the image sensor instead of the lens barrel, the patent enables easier tilt correction. The substrate can be tilted at an angle relative to the lens barrel to correct tilt, while still maintaining auto focus functionality through controlled movement in the optical direction
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 new substrate simplifies the camera module structure by moving the image sensor relative to the lens barrel, reducing noise and improving operational reliability while stabilizing the image sensor's movement, thus enhancing the OIS and AF functions.
Implementation Method 1
a spring plate having an elastic member disposed in a first open region... the second plate part... connected to the first plate part by the elastic member
Data Source
AI summary
A substrate for an image sensor according to an embodiment includes an insulating layer; and a conductive pattern portion disposed on the insulating layer, wherein the insulating layer comprises: a first insulating part; and a second insulating part surrounding the first insulating part and spaced apart from the first insulating part with an open region therebetween, wherein the conductive pattern portion comprises a first lead pattern part disposed on the first insulating part; a second lead pattern part disposed on the second insulating part; and an extension pattern part disposed on the open region of the insulating layer to connect the first lead pattern part with the second lead pattern part and including a bent portion.