Anti-shake Apparatus Two-Axis Hall Element Position Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing anti-shake apparatuses for photographing devices have limited movement ranges due to the narrow linear output-change range of one-axis hall elements, restricting accurate position detection and correction.
Innovation Solution
An anti-shake apparatus with a movable unit and a fixed unit, utilizing horizontal and vertical magnetic-field change-detecting elements and position-detecting magnets to enable accurate position detection in both directions, allowing for a wider movement range and improved correction capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a one-axis hall element is used for position detection, then the device structure is simple, but the movement range for accurate position detection is limited
Solution Approach 1:
The patent transitions from one-axis hall elements to two-axis hall elements, adding a dimensional aspect to position detection. This allows detection of positions in both horizontal and vertical directions simultaneously, expanding the accurate detection range from approximately ±0.5mm to a wider range while maintaining reasonable device complexity.
Solution Approach 2:
The patent employs two-axis hall elements that perform multiple detection functions (horizontal and vertical position detection) within a single sensor component. This multi-functional approach enlarges the effective movement range for accurate position detection without proportionally increasing device complexity.
2Adaptability or versatility
If the movement range of the movable unit is increased, then the anti-shake correction capability is improved, but the position detection accuracy decreases due to non-linear output change
Solution Approach 1:
The patent uses two-axis hall elements that dynamically adapt to positions in both horizontal and vertical directions. This dynamic detection capability maintains linear output-change characteristics across a wider movement range, allowing the movable unit to achieve larger anti-shake correction capability while preserving position detection accuracy through the elements' inherent linearity properties.
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
Enlarges the movement range for accurate position detection and correction, enhancing the anti-shake performance by using a combination of horizontal and vertical magnetic-field change-detecting elements and position-detecting magnets, effectively addressing the limitations of one-axis hall elements.
Implementation Method 1
One of the movable unit and the fixed unit has a magnetic-field change-detecting unit which has a horizontal magnetic-field change-detecting element for detecting a position of the movable unit
Implementation Method 2
Japanese unexamined patent publication (KOKAI) No. 2002-229090 discloses an anti-shake apparatus for a photographing apparatus. The anti-shake apparatus performs a position-detecting operation of the movable unit, by using a hall element and a permanent magnet
Data Source
AI summary
An anti-shake apparatus of a photographing apparatus comprises a movable-unit and a fixed-unit. The movable-unit has an imaging-device and is movable in first and second directions. The fixed-unit slidably supports the movable-unit in both the first and second directions. The movable-unit has a horizontal hall-element for detecting a first location in the first direction of the movable-unit, and a vertical hall-element for detecting a second location in the second direction of the movable-unit. The fixed-unit has a magnet unit which is used for detecting the first and second locations, and which has first and second horizontal magnets and first and second vertical magnets. The polarities of the first and second horizontal magnets are arranged in opposite directions, in the third direction. N-pole of the first horizontal magnet and S-pole of the second horizontal magnet are separated in the first direction by a first distance, and face the horizontal hall-element.