Shift Lens Actuator Control for Lower-Power Image Stabilization
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Solution Overview
Problem
Existing lens apparatuses requiring simultaneous driving of multiple actuators for shift lenses consume large amounts of electric power and may face difficulties in power supply, making it challenging to operate effectively.
Innovation Solution
The lens apparatus incorporates a shift lens driven by a first and second actuator in orthogonal directions, controlled by a processor to avoid simultaneous operation of both actuators, thereby reducing power consumption and ensuring efficient movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple actuators drive shift lenses simultaneously in arbitrary directions, then the lens can achieve tilt and shift effects efficiently, but the power consumption increases significantly
Solution Approach 1:
The control unit drives actuators in a sequential periodic manner rather than simultaneously. When moving the shift lens in a third direction, the system first drives the first actuator in a first direction, then drives the second actuator in a second direction after a predetermined time interval, avoiding simultaneous operation and reducing peak power consumption while maintaining movement efficiency
2Loss of time
If multiple actuators operate simultaneously to move shift lenses in arbitrary directions, then the lens can reach desired positions faster, but the power supply may become insufficient
Solution Approach 1:
The system employs periodic sequential driving of actuators with predetermined time intervals between operations. This ensures that the power supply is never overloaded by simultaneous actuator operation, while the sequential completion of movements guarantees that the shift lens still reaches the desired position reliably
Solution Approach 2:
The control unit calculates and determines the driving directions and timing sequences in advance before actual movement occurs. By pre-planning the sequential actuator operation with predetermined time intervals, the system ensures both timely completion of lens positioning and reliable power supply operation
Data Source
AI summary
A lens apparatus includes a shift lens movable in a direction orthogonal to an optical axis of an imaging optical system, an actuator configured to drive the shift lens in a plane orthogonal to the optical axis, a memory storing instructions, and a processor configured to execute the instructions to control the actuator. The actuator includes a first actuator configured to drive the shift lens in a first direction within the plane, and a second actuator configured to drive the shift lens in a second direction within the plane. In driving the shift lens in a third direction different from the first direction and the second direction, the processor controls the actuator so that the first actuator and the second actuator are not simultaneously driven.