Pixel Shifting Device Frame Reinforcement for Actuator Stress
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Solution Overview
Problem
Existing pixel shifting devices face challenges in increasing the rigidity of the frame without incurring increased costs, larger device configurations, or reduced workability, particularly due to the concentrated stress from actuators disposed on one side of the second frame.
Innovation Solution
A pixel shifting device is designed with a frame reinforcement member disposed at the side where the first and second actuators are located, which increases the rigidity of the second frame by contacting its surface, allowing for balanced oscillation and reduced stress concentration, thereby enhancing durability and reducing size while maintaining efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the first actuator and the second actuator are intensively disposed at one side of the second frame, then it is possible to efficiently cool the actuators as heat sources, but the stress caused by the drive of the actuators is concentrated at one side of the second frame to affect the durability
Solution Approach 1:
The patent applies local quality by adding a frame reinforcement member specifically at the side where actuators are disposed. This reinforcement member has a first surface that contacts the second frame, providing localized structural support exactly where stress concentration occurs due to intensive actuator placement, thereby maintaining durability without dispersing the actuators and compromising cooling efficiency.
2Strength
If the second frame is formed of a lightweight and high-strength member or the second moment of area is increased, then the rigidity of the second frame is increased, but the cost increases, the size of the device configuration grows, or workability degrades
Solution Approach 1:
The patent applies segmentation by dividing the reinforcement function into a separate frame reinforcement member rather than making the entire second frame heavier or more complex. This modular approach allows the reinforcement to be added only where needed (at the actuator side), avoiding the need to increase the overall size or complexity of the second frame while achieving the required rigidity.
Solution Approach 2:
The patent applies dimensionality change by adding the frame reinforcement member as an additional structural element in the spatial arrangement. Instead of increasing the thickness or changing the material of the existing second frame, a new component is introduced that provides reinforcement through its geometric configuration and contact surface, effectively adding structural dimension without proportionally increasing overall device size.
Data Source
AI summary
A pixel shifting device according to the present disclosure includes a first frame which is configured to hold an optical member, and which oscillates around a first oscillation axis, a second frame which is coupled to the first frame, and which oscillates around the second oscillation axis, a base to be coupled to the second frame, a first actuator for oscillating the first frame, a second actuator which is disposed in an area at a side at which the first actuator is disposed in the second frame, and which oscillates the second frame, and a frame reinforcement member which is disposed in an area at a side at which the first actuator and the second actuator are disposed in the second frame, and which has a first surface having contact with a surface of the second frame.