Extending Wire Design for Vibration Buffering in Projector Optical Modules
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Solution Overview
Problem
In projector systems, the wires extending from vibrating coils in moving-coil-type pixel offset devices are prone to fracture due to metal fatigue, which affects the pixel quality and reliability of the projection.
Innovation Solution
The optical module design includes a coil device with extending wires that are longer in proportion to the width of the transparent component, allowing for greater vibration buffering and positioned near the rotation axis to minimize displacement and fatigue, thereby preventing wire fracture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the coil device vibrates with larger amplitude to improve pixel offset range, then the pixel quality is improved, but the wires are more prone to fracture due to increased metal fatigue
Solution Approach 1:
The patent applies beforehand cushioning by designing an extended wire structure that protrudes from the coil body along the vibration direction. This extension creates a buffer zone that absorbs vibration stress before it reaches the wire's fixed end, preventing metal fatigue and fracture while allowing the coil to vibrate with larger amplitude for improved pixel quality
2Reliability
If the wire length is increased to prevent fracture, then the wire durability is improved, but the device complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the wire into two functional segments: a fixed end embedded in the coil body and an extended end protruding from the coil. This segmentation allows the extended portion to absorb vibration stress independently, providing durability without requiring the entire wire structure to be overly complex or lengthy
3Measurement precision
If the coil vibration amplitude is increased to improve pixel offset, then the image quality is improved, but the wires experience greater stress leading to fracture
Solution Approach 1:
The extended wire structure provides beforehand cushioning by creating a stress-absorbing extension that protrudes from the coil body. This extension acts as a shock absorber during large-amplitude vibrations, protecting the main wire from excessive stress while allowing the coil to achieve the necessary vibration amplitude for precise pixel offset
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 design ensures that even with large displacements, the wires have sufficient length for effective vibration buffering and are less likely to fatigue or fracture, enhancing the projector's operational durability and image quality.
Implementation Method 1
the at least one coil device is adapted to be driven by a magnetic force to vibrate along at least one rotation axis
Data Source
AI summary
An optical module including a transparent component and at least one coil device is provided. The at least one coil device is connected to the transparent component and includes a main body and at least one extending wire. The at least one extending wire is extended out from the main body, the at least one coil device is adapted to be driven by a magnetic force to vibrate along at least one rotation axis, and a length of the at least one extending wire is in positive correlation with a width of the transparent component along a direction. The direction is perpendicular to the at least one rotation axis and perpendicular to an optical axis of the transparent component. In addition, a projector having the optical module is also provided.