Lens Driving Control Device Variable Speed Interference Prevention
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Solution Overview
Problem
Existing lens driving-control devices face challenges in simultaneously driving multiple lens groups without interference, leading to prolonged image stabilization times in cameras, especially when temperature is low, due to overlapping movable ranges and complex mechanical structures.
Innovation Solution
A lens driving-control device with adjustable motor speeds and position-detecting mechanisms that adjust driving speeds based on positional relationships and temperature, using DC and pulse motors to prevent interference and excessive separation among lens groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If lens groups are driven simultaneously by individual motors, then driving time is reduced, but interference between lens groups occurs due to overlapping movable ranges
Solution Approach 1:
The patent applies dynamics by making the driving speed of lens groups variable rather than constant. The control device dynamically adjusts the driving speed of each lens group based on real-time positional relationships detected by position-detecting devices. When lens groups approach overlapping positions, their driving speeds are automatically reduced to prevent interference, while maintaining simultaneous operation to minimize overall driving time.
Solution Approach 2:
The patent implements feedback control through position-detecting devices that continuously monitor the positions of multiple lens groups. This positional information is fed back to the control device, which then adjusts the driving speeds of individual lens groups accordingly. This closed-loop feedback system enables simultaneous driving while preventing interference by dynamically responding to the actual spatial relationships between lens groups.
2Reliability
If lens groups are driven sequentially, then interference is avoided, but driving time is prolonged
Solution Approach 1:
The patent transitions from static sequential driving to dynamic simultaneous driving with variable speeds. By allowing multiple lens groups to move at the same time while continuously adjusting their speeds based on positional feedback, the system achieves both interference prevention and reduced driving time, eliminating the need for sequential operation.
Solution Approach 2:
The patent applies preliminary action by having the control device pre-establish speed adjustment rules and thresholds based on the known movable ranges and interference zones of lens groups. When lens groups approach critical positions, the control device proactively reduces their driving speeds before interference occurs, enabling smooth simultaneous operation without waiting for interference to happen.
3Productivity
If mechanical driving mechanisms are used, then lens groups can be driven simultaneously, but device structure becomes complicated
Solution Approach 1:
The patent replaces complex mechanical driving mechanisms with independent motors for each lens group, controlled by an electronic control device. This substitution eliminates the need for complex mechanical linkages, gears, or cam mechanisms that would be required to coordinate simultaneous movement of multiple lens groups. The electronic control system with position feedback provides the same coordination function with simpler, more modular components.
4Loss of time
If driving speed is increased to reduce stabilization time, then image quality deteriorates due to interference
Solution Approach 1:
The patent applies dynamics by implementing variable speed control that adapts to real-time conditions. Lens groups can operate at higher speeds when spatial separation is sufficient, reducing overall stabilization time. When lens groups approach positions where interference would occur, their speeds are dynamically reduced to maintain image quality. This dynamic speed adjustment optimizes both time and precision.
Solution Approach 2:
The patent changes the driving speed parameter dynamically based on positional relationships between lens groups. By monitoring positions and adjusting speeds as control parameters, the system maintains optimal operating conditions throughout the driving process, preventing interference while minimizing total stabilization time.
Data Source
AI summary
A lens driving-control device including a plurality of lens groups having variable magnification function, a plurality of lens driving devices each of which being configured to adjustably drive a driving speed of each of the plurality of lens groups, a control device configured to control each of the plurality of lens driving devices to adjust the driving speed of each of the plurality of lens groups, and a plurality of lens position-detecting devices each of which being configured to detect a position of each of the plurality of lens groups, when the plurality of lens driving devices drive the plurality of lens groups simultaneously, the control device being configured to control the lens driving devices to switch driving speeds of the plurality of lens groups to a driving speed of a lens group to be adjusted depending on a positional relationship among the plurality of lens groups, the positional relationship being detected by the lens position-detecting devices.