MEMS Projecting Apparatus Frame Angle Precision
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional projecting apparatuses with microelectromechanical systems (MEMS) modules face challenges in maintaining precise angles between MEMS units, as the angles defined by bending metal plates are prone to large deviations.
Innovation Solution
A projecting apparatus is designed with a frame structure that includes a first and second frame portion, a light channel, and guiding slots, where the MEMS module consists of a flexible circuit board and two MEMS units that are assembled to the frame, allowing precise control of the angle between the first and second MEMS units through the second frame portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If metal plate bending is used to define angles between MEMS units, then the structure is simple and easy to manufacture, but the angle precision deteriorates with large deviations
Solution Approach 1:
The frame is segmented into multiple components: a first frame portion, a second frame portion, and a partition. The partition is separately connected to both frame portions, allowing independent positioning and assembly. This segmentation enables precise angle control through the partition's geometry rather than relying on metal plate bending, thereby improving angle precision while maintaining manufacturing ease through modular assembly.
Solution Approach 2:
The partition acts as an intermediary component between the first and second frame portions. It is connected to both frame portions and provides the precise angular relationship between them. The partition's geometry defines the exact angle between the frame portions, serving as a mediator that transfers and maintains the precise angular relationship without requiring direct bending of the frame portions themselves.
2Device complexity
If metal plate bending is used to position MEMS units, then the structure is simple, but the angle stability deteriorates due to large deviations
Solution Approach 1:
By segmenting the frame into separate components (first frame portion, second frame portion, and partition), the structure achieves better angle stability. Each component can be manufactured with high precision using standard techniques, and their assembly through defined connection points ensures consistent angular relationships. This segmentation reduces the cumulative errors inherent in metal plate bending while maintaining reasonable structural complexity.
Solution Approach 2:
The partition is designed and manufactured beforehand with precise geometric features that define the required angle. This preliminary action of creating a precision reference component (the partition) before final assembly ensures that the angular relationship is predetermined and stable, eliminating the need for post-assembly angle adjustments and improving overall angle stability.
3Manufacturing precision
If a rigid frame structure is used to maintain MEMS unit angles, then angle precision can be maintained, but heat dissipation efficiency deteriorates
Solution Approach 1:
The partition is designed as a thin-walled or flexible structure that provides sufficient geometric precision for angle definition while maintaining good thermal contact with the MEMS units. The thin-walled design reduces thermal resistance, allowing efficient heat conduction from the MEMS units to the frame's heat dissipation structures, thereby improving heat dissipation efficiency while maintaining angle precision through the partition's rigid geometric features.
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 enables precise control of the predetermined angle between MEMS units, improving the accuracy and stability of the projecting apparatus, and enhances heat dissipation efficiency by direct heat conduction to a heat sink.
Implementation Method 1
The first MEMS unit and the second MEMS unit have a predetermined angle there-between by the second frame portion
Implementation Method 2
enhances heat dissipation efficiency by direct heat conduction to a heat sink
Data Source
AI summary
A projecting apparatus is provided, and includes a frame, a light source module, and a microelectromechanical systems (MEMS) module. The frame includes two lateral boards respectively arranged on two opposite sides thereof, and a transverse beam that connects the two lateral boards. Each of the two lateral boards has a guiding slot recessed in a portion thereof. The MEMS module is configured to transmit light emitted from the light source module, and includes a flexible circuit board, a first MEMS unit, and a second MEMS unit, the latter two of which are connected to the flexible circuit board. The first MEMS unit is inserted into the guiding slots of the two lateral boards. The second MEMS unit abuts against the two lateral boards and/or the transverse beam. The first MEMS unit and the second MEMS unit have a predetermined angle there-between by the second frame portion.