Rectangular Lens Movable Range for Independent Camera Shake Correction
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Solution Overview
Problem
Existing imaging devices with circular or octagonal correction lens movable ranges face challenges in panning and tilt operations, leading to reduced correctable ranges and difficulty in capturing subjects due to interference between horizontal and vertical correction ranges.
Innovation Solution
An imaging device with a movable range limited to a rectangle inscribed within a circle, allowing for both subject-following performance and lens size reduction, utilizing a shake detection unit and correction unit to adjust the imaging lens and element relative to each other, with a control unit managing the movable range for optimal image stabilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the movable range of the correction lens is formed in a circular shape or an octagonal shape, then the lens size can be reduced, but the correctable range in horizontal and vertical directions affects each other, causing shake correction to suddenly stop
Solution Approach 1:
The patent changes the correction lens movable range from a circular or octagonal shape to a rectangular shape. This asymmetric change in geometry allows the horizontal and vertical correctable ranges to be independent of each other, preventing the mutual interference that occurs in circular designs. The rectangular shape enables the correction lens to maintain subject-following performance during panning and tilt operations without sudden stoppage, while still achieving lens size reduction.
2Volume of moving object
If the correction lens is positioned at a displaced location during panning or tilt operation, then the correctable range in one direction is reduced, but this causes difficulty in capturing the subject on the finder or display
Solution Approach 1:
The rectangular movable range design provides sufficient correction authority in both horizontal and vertical directions independently. When the correction lens is positioned at a displaced location during panning or tilt, the rectangular shape ensures that the correctable range in the perpendicular direction is not reduced, maintaining reliable subject capture on the finder or display.
3Ease of operation
If the movable range is limited to a rectangle inscribed within a circle, then both subject-following performance and lens size reduction are achieved, but the maximum movable range is constrained
Solution Approach 1:
The patent optimizes the rectangular movable range dimensions to achieve the best balance between subject-following performance and lens size. By carefully selecting the width and height parameters of the rectangle, the design ensures sufficient correction capability for both panning and tilt operations while minimizing the overall lens size. The rectangular shape allows independent optimization of horizontal and vertical correction ranges.
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
Ensures effective shake correction and subject tracking while minimizing lens size, preventing sudden stoppage of camera shake correction and maintaining image quality during panning and tilt operations.
Implementation Method 1
an imaging element converting a received subject image into an image signal
Implementation Method 2
a shake detection unit that continuously detects a shake of the imaging unit
Implementation Method 3
a correction unit that corrects a shake of the subject image by moving the imaging lens and the imaging element relative to each other according to the detected shake
Data Source
AI summary
An imaging device including an imaging unit that includes an imaging element converting a received subject image into an image signal and an imaging lens, and at least one of the imaging lens or the imaging element being movable in a direction orthogonal to a direction of an optical axis of an incidence ray; a shake detector that detects a shake of the imaging unit; and a processor configured to correct a shake of the subject image by moving at least one of the imaging lens or the imaging element relative to one another according to the detected shake, wherein the processor is further configured to determine whether or not a movable range of the relative movement, in which the shake of the subject image is corrected, is limited to an inside of a rectangle according to at least one of an imaging mode, an imaging timing, or a relative position of the imaging lens and the imaging element.