Moving Head Light Filter Mechanism for Sunlight Damage Protection
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Solution Overview
Problem
Moving head light fixtures are vulnerable to damage from direct sunlight or intense light rays magnified through their lenses, as existing solutions either require manual intervention or are not automatically engaged when the fixture is powered off or pointed upwards.
Innovation Solution
A mechanism that automatically biases a filter or diffuser into the optical path between the lens and the light source when the fixture is powered off or when the lens is pointed upwards for a predetermined time, using a motor or spring-based system to retract it when in use, thereby protecting the optical system from strong light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the light fixture is left pointed upwards when powered off, then the fixture is ready for quick repositioning, but the optical system is vulnerable to damage from sunlight magnification
Solution Approach 1:
The filter is automatically inserted into the optical path before the user can reposition the fixture, preventing sunlight damage in advance. The system detects when the fixture is pointed upwards and activates the filter mechanism proactively, so the optical system is protected before harmful light can cause damage.
Solution Approach 2:
A motorized filter acts as an intermediary element between the optical system and the external environment. This filter can be inserted into the optical path to block sunlight from reaching and magnifying through the lens, thereby protecting the optical system while allowing the fixture to remain in its operational position.
2Object-affected harmful factors
If a motorized filter is always inserted into the optical path, then the optical system is protected from sunlight, but the filter must be retracted during normal operation which complicates the mechanism
Solution Approach 1:
The filter mechanism is designed to be dynamic rather than static. The filter can be inserted into or retracted from the optical path as needed, allowing the system to adapt between protected and operational states. This dynamic capability enables automatic protection when the fixture is pointed upwards while maintaining clear optical path during normal lighting operations.
Solution Approach 2:
The system incorporates sensors that detect when the fixture is pointed upwards and automatically trigger the filter insertion mechanism. This feedback loop eliminates the need for manual intervention and ensures the filter is only inserted when necessary, reducing unnecessary mechanical operations and simplifying the overall control logic.
3Object-affected harmful factors
If users manually cover the light fixture with garbage bags, then the optical system is protected from sunlight, but the operation becomes cumbersome and non-automatic
Solution Approach 1:
The light fixture incorporates an automatic self-protection mechanism that detects when it is pointed upwards and automatically inserts the filter into the optical path. This eliminates the need for users to manually cover the fixture with garbage bags or other materials, as the system protects itself autonomously based on its own operational state.
Solution Approach 2:
The manual mechanical action of covering the fixture with garbage bags is replaced by an automated motorized filter insertion system. The motorized mechanism provides precise, reliable protection without requiring user intervention, transforming a cumbersome manual process into an automatic electronic control system.
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
Effectively prevents damage from sunlight or intense light by automatically engaging a filter or diffuser when the light fixture is not in use, ensuring the optical system's protection without increasing the fixture's weight or cost, and maintaining functionality.
Implementation Method 1
a filter or diffuser to block impinging light, including sunlight
Implementation Method 2
a filter or diffuser to block impinging light
Implementation Method 3
the front lens 20 can focus and concentrate light from the sun 30
Data Source
Figure 1
Figure 2A~2B
Figure 2C~2D
AI summary
An apparatus and method for covering the optical system of a moving head light fixture with a filter or diffuser when the lighting fixture is turned off is provided. The filter or diffuser is positioned in the optical path between a lighting element and a lens. A retraction device is energized to retract the filter or diffuser from the optical path during normal operation. Upon removal of power to the fixture, the filter mechanism automatically returns the filter or diffuser to its position in the optical path. In this way, the optical system of the fixture can be protected from damage caused by impinging strong light and/or sunlight when the fixture is not in use.