Dual-Lens Module Driving Device Compact Structure
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Solution Overview
Problem
Dual-camera systems in portable devices face challenges in achieving wide-angle and long-focus capabilities simultaneously, with limited shooting range and inability to produce bokeh effects, and require improved auto-focusing and anti-shaking functions.
Innovation Solution
A dual-lens module driving device with a compact structure featuring parallel accommodating cavities for two lens tubes, focusing coils, magnetic steel sets, optical anti-shaking coils, and elastic sheets, allowing for precise AF focus and anti-shaking compensation to enhance shooting accuracy and sharpness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If two single auto-focusing devices are used respectively in each lens tube, then each lens tube can focus independently, but the shooting accuracy of the dual cameras cannot be ensured due to lack of coordinated control
Solution Approach 1:
The patent combines the auto-focusing control of two lens tubes into a single integrated control system. The first and second focusing coil sets are coordinated through a unified control mechanism that manages both lens tubes simultaneously, ensuring consistent focusing accuracy across the dual-camera system while reducing control complexity.
Solution Approach 2:
The integrated control system performs multiple functions: it controls both the first and second lens tubes for auto-focusing, coordinates the optical anti-shaking mechanism, and manages the translational suspension system. This multi-functional approach improves shooting accuracy without proportionally increasing control system complexity.
2Length of stationary object
If a dual-lens module with shared support frame is used, then the device length is reduced, but the anti-shaking function needs to be improved to maintain stability
Solution Approach 1:
The patent merges the anti-shaking control for both lens tubes into a single optical anti-shaking coil set that operates on the shared support frame. This unified anti-shaking mechanism compensates for vibrations affecting both lenses simultaneously, maintaining reliability while keeping the compact structure.
Solution Approach 2:
The translational suspension system acts as an intermediary mechanism between the fixed support frame and the focusing coil sets. It allows the focusing components to move independently in the vertical optical axis plane while the support frame remains stable, effectively decoupling the compact structure from vibration stability requirements.
3Productivity
If focusing coil sets are positioned close to lens tubes for efficient driving, then focusing performance improves, but magnetic steel sets require precise spacing to avoid interference
Solution Approach 1:
The patent segments the magnetic steel sets into first and second magnetic steel sets, each specifically positioned for its corresponding focusing coil set. The first magnetic steel set is arranged opposite the first focusing coil set, and the second magnetic steel set is arranged opposite the second focusing coil set, with specified spacing to prevent magnetic interference while maintaining efficient focusing performance.
4Length of stationary object
If lens tubes are accommodated in parallel cavities to reduce device length, then compactness is achieved, but the structure requires precise alignment to ensure optical performance
Solution Approach 1:
The patent merges the accommodation of two lens tubes into a single support frame with first and second cavities. This integrated structure ensures that both cavities are pre-aligned relative to each other, reducing the need for post-assembly alignment adjustments while maintaining the compact parallel 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 solution increases shooting range, reduces device length, and improves shooting accuracy and sharpness by enabling simultaneous AF focus and anti-shaking compensation, effectively addressing the limitations of existing dual-camera systems.
Implementation Method 1
a first focusing coil set annularly arranged on an outside surface of the first lens tube for driving the first lens tube AF focus or adjust the change of an optical axis during the AF focus; a second focusing coil set annularly arranged on an outside surface of the second lens tube for driving the second lens tube AF focus
Implementation Method 2
a first magnetic steel set fixed in the support frame and arranged opposite to the first focusing coil set with spacing; a second magnetic steel set fixed in the support frame and arranged opposite to the second focusing coil set with spacing
Implementation Method 3
an optical anti-shaking coil set arranged below the first magnetic steel set and the second magnetic steel set, and fixed in the circuit board for driving the support frame to move in a horizontal direction
Implementation Method 4
a first elastic sheet set with one end fixed in the support frame, and the other end fixed in the first lens tube; a second elastic sheet set with one end fixed in the support frame, and the other end fixed in the second lens tube
Data Source
AI summary
The present disclosure provides a dual-lens module driving device, which comprises a shell, wherein the shell comprises a top wall and a side wall, the top wall is provided with a first opening and a second opening, a base and a support frame, the support frame is provided with a first accommodating cavity and a second accommodating cavity, a first lens tube, a second lens tube, a first lens set, a second lens set, a first focusing coil set, a second focusing coil set, a first magnetic steel set, a second magnetic steel set, a circuit board, an optical anti-shaking coil set, a first elastic sheet set, a second elastic sheet set, a translational suspension system and a connecting terminal. Compared with the related arts, the dual-lens module driving device of the present disclosure is provided with two lens sets, so that the shooting range is increased; the two lens tubes share one support frame, so that the structure is compact; the two focusing coil sets are provided to improve the shooting accuracy; and the dual-lens module driving device is also provided with the optical anti-shaking coil set, which can effectively compensate for a dither amplitude position and improve the shooting effect and sharpness.