Optical Equipment Lens Driver Power Consumption Control
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Solution Overview
Problem
Existing autofocus mechanisms in digital cameras face challenges in minimizing power consumption while preventing image blurring, especially with increased pixel density, as the stopping position of the magnetic pole is associated with lens position, leading to potential blurring during focusing operations.
Innovation Solution
The implementation of an optical equipment system that includes a lens driving unit, an aperture driving unit, and an aperture drive-control unit to position the focusing lens within a focal depth, minimizing power consumption and controlling the aperture to prevent image blurring, utilizing a step motor with micro-step driving and eco-mode operation to optimize power usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the magnetic pole is moved to a position requiring low power consumption, then power consumption is reduced, but image blurring occurs due to lens position association
Solution Approach 1:
The patent applies dynamics by making the aperture opening degree variable rather than fixed. The aperture driving unit dynamically adjusts the aperture opening degree based on the lens position, allowing the system to adapt to different focusing states. This dynamic adjustment enables the magnetic pole to be positioned at low-power consumption positions while maintaining acceptable image quality through corresponding aperture adjustments.
Solution Approach 2:
The patent changes the parameter of aperture opening degree to resolve the contradiction. By varying the aperture opening degree as a control parameter, the system can decouple the direct association between magnetic pole position and lens position. The aperture drive-control unit adjusts the aperture parameter independently to compensate for potential image blurring, allowing power consumption reduction without sacrificing image quality.
2Illumination intensity
If the aperture opening degree is increased, then more light enters the lens, but the focal depth decreases causing image blurring
Solution Approach 1:
The patent applies dynamics by making the aperture opening degree variable rather than fixed. The aperture driving unit dynamically adjusts the aperture opening degree based on the lens position, allowing the system to adapt to different focusing states. This dynamic adjustment enables the magnetic pole to be positioned at low-power consumption positions while maintaining acceptable image quality through corresponding aperture adjustments.
Solution Approach 2:
The patent applies preliminary action by determining the appropriate aperture opening degree in advance based on the lens position before imaging occurs. The aperture drive-control unit calculates and sets the optimal aperture opening degree that balances light intake and focal depth requirements, preventing image blurring before it occurs during the imaging process.
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
This solution effectively stops the lens in a position that minimizes image blur and reduces power consumption, ensuring clear images with low power usage, even in high-resolution digital cameras, by strategically positioning the magnetic pole and adjusting aperture values to maintain focus within the focal depth.
Implementation Method 1
a step motor with micro-step driving and eco-mode operation to optimize power usage
Implementation Method 2
the magnetic pole is moved from its stopping position to a more stable position
Data Source
AI summary
Optical equipment which can prevent image blurring and enable a lens to be stopped in a position requiring low power consumption is provided. The optical equipment includes a lens driver supplied with electric power from a camera body to drive a focusing lens. The equipment further includes an aperture driver that drives an aperture and a drive controller that positions the focusing lens to minimize power consumption and controls the aperture driver during opening of the aperture so that the focal position of the focusing lens falls within a focal depth. In this way, a lens position-controller that controls an AF motor can stop the lens in a position that does not cause image blur and reduces power consumption.