Lateral Connecting-Belt Circuit Board for Lower Movement Resistance
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Solution Overview
Problem
The existing camera modules face challenges with increased lens weight affecting anti-shake capability due to limited motor driving force, higher resistance from connecting belts, complex motor structures, and increased module height, which hinder miniaturization and production efficiency.
Innovation Solution
A circuit board design with lateral connecting belts extending from symmetrical sides, utilizing a non-plug-in electrical connection through conductive holes and welding medium, and a side concaving portion-pin type welding structure to reduce resistance and height, enhancing yield and assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the lens weight is increased to improve imaging quality, then the imaging quality is improved, but the motor driving force becomes insufficient and the anti-shake capability deteriorates
Solution Approach 1:
The patent divides the anti-shake system into two independent driving units: a lens driving motor for driving the optical lens, and a chip driving motor for driving the photosensitive chip. This segmentation allows each motor to be optimized for its specific task, with the chip driving motor compensating for the insufficient driving force when moving the heavier lens.
2Reliability
If the traditional connecting belt structure is used to connect the circuit board, then the electrical connection is achieved, but the resistance force to the movement of the photosensitive chip increases
Solution Approach 1:
The patent extracts and removes the traditional connecting belt structure from the circuit board design. Instead of using a connecting belt that extends from the side surface, the invention uses a main body structure with lateral connecting portions that are integrated into the circuit board, eliminating the harmful resistance force while maintaining electrical connection reliability.
3Area of stationary object
If more layers of PCB boards are stacked to increase the wiring area, then the wiring area is increased, but the height of the camera module increases
Solution Approach 1:
The patent transitions from a traditional planar circuit board layout to a three-dimensional structure with lateral connecting portions that extend from the side surfaces of the main body. This dimensional change allows the wiring area to be expanded in the lateral direction rather than increasing the height through additional PCB layers, thus reducing the overall module height.
4Reliability
If the dual OIS motor structure is adopted to improve anti-shake effect, then the anti-shake effect is improved, but the motor structure complexity and wiring area increase
Solution Approach 1:
The patent merges the dual motor control functions into an integrated circuit board design where the main body structure houses both the lens driving motor and chip driving motor controls. The lateral connecting portions provide integrated wiring pathways that reduce the overall complexity of the motor structure and wiring arrangement.
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 significantly reduces movement resistance, improves anti-shake performance, and miniaturizes the camera module by optimizing the circuit board structure, ensuring high yield and efficient production.
Implementation Method 1
a welding medium is attached to a sidewall of the conductive holes and passed through the conductive holes to be contacted with the corresponding bonding pads
Data Source
AI summary
Disclosed is a circuit board for a camera module including a circuit board body and at least two lateral connecting belts, wherein the lateral connecting belts are led out from the side surfaces of the circuit board body and bend upwards, and, after being bent, extend on the side surfaces of a camera module to form lateral connecting belt bodies, an outer surface of a hard plate of one of the lateral connecting belts is provided with a plurality of bonding pads, and the hard plate of the other lateral connecting belt has a plurality of conductive holes, so that the movement resistance of a circuit board body and a photosensitive chip can be reduced, while the yield and production efficiency are improved.