Optical Module Color Wheel Switching via Magnetic Attraction
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Solution Overview
Problem
Existing digital light processing projectors require manual replacement of color wheels or complex and costly driving mechanisms to switch color modes, making them inconvenient and costly.
Innovation Solution
An optical module with a driving unit, two color wheels, an electromagnet, and magnets, where the polarity control unit controls the electromagnet to attract magnets and rotate the second color wheel in conjunction with the first, allowing for rapid color mode switching through magnetic attraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a driving mechanism is used to drive one color wheel to move with respect to the other color wheel, then color mode switching is enabled, but the device complexity and cost increase
Solution Approach 1:
The patent replaces a complex mechanical driving mechanism with an electromagnetic interaction system. An electromagnet mounted on the first color wheel interacts with magnets on the second color wheel through magnetic attraction, enabling the second color wheel to rotate and change positions without direct mechanical coupling. This substitution of mechanical transmission with electromagnetic force reduces the number of mechanical components and simplifies the overall driving mechanism.
Solution Approach 2:
The magnetic field acts as an intermediary between the two color wheels. Instead of direct mechanical contact, the electromagnet generates a magnetic field that attracts the magnets on the second color wheel, causing it to rotate. This intermediary magnetic field transmission allows for contactless coupling and simplifies the mechanical interface between the two color wheels.
2Adaptability or versatility
If a driving mechanism is used to drive one color wheel to move with respect to the other color wheel, then color mode switching is enabled, but the manufacturing cost increases
Solution Approach 1:
The patent replaces expensive mechanical driving mechanisms with a simpler electromagnetic system. The electromagnet and magnets configuration eliminates the need for complex gear trains, belts, or direct mechanical linkages, thereby reducing manufacturing costs while maintaining the color mode switching functionality.
Solution Approach 2:
The magnetic attraction between the electromagnet and magnets creates a self-aligning and self-actuating system. When the electromagnet is activated, it automatically attracts the magnets on the second color wheel, causing rotation to the desired position without requiring additional mechanical actuators or complex control mechanisms, thus reducing manufacturing complexity and cost.
3Adaptability or versatility
If manual replacement of color wheel is required, then color mode switching is achieved, but the ease of operation deteriorates
Solution Approach 1:
The system automatically switches between color modes through electromagnetic actuation. When a color mode change is required, the control system activates the electromagnet, which automatically attracts the magnets on the second color wheel to rotate it to the appropriate position. This eliminates the need for manual intervention, significantly improving ease of operation while maintaining color mode switching capability.
Solution Approach 2:
The manual mechanical replacement operation is replaced by an automated electromagnetic actuation system. The electromagnet-magnet interaction provides automatic color wheel switching, transforming a manual task into an automated process that responds to user input or system requirements without physical manipulation by the user.
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
Enables simple and cost-effective switching of color modes by precise magnetic attraction, reducing complexity and operational costs while allowing for precise positioning of color wheels.
Implementation Method 1
The polarity control unit controls a direction of current flow in the first electromagnet to control a polarity of the first electromagnet, such that the first electromagnet attracts one of the first magnets during rotation to drive the second color wheel to rotate along with the first color wheel
Data Source
AI summary
An optical module includes a driving unit, a first color wheel, a second color wheel, a first electromagnet, a plurality of first magnets and a polarity control unit. The driving unit has a rotating shaft. The first color wheel is fixed on the rotating shaft. The second color wheel is freely disposed on the rotating shaft. The first electromagnet is disposed on the first color wheel and the first magnets are disposed on the second color wheel. The driving unit drives the first color wheel to rotate, such that the first electromagnet rotates along with the first color wheel. The polarity control unit controls a direction of current flow in the first electromagnet to control a polarity of the first electromagnet, such that the first electromagnet attracts one of the first magnets during rotation to drive the second color wheel to rotate along with the first color wheel.