LED Illumination Assemblies with Rotatable Polarizing Filters
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Solution Overview
Problem
Existing LED lamp designs for interior illumination in compartments like elevator passenger cabs struggle to maintain consistent light levels due to aging or replacement of LEDs, and lack efficient mechanisms for adjusting light intensity without rotating the entire lamp module.
Innovation Solution
The implementation of interior illumination assemblies with LED dimmers and rotatable polarizing filters, allowing for adjustable light emission levels by rotating the lower polarizing filter relative to a fixed upper filter, and using a suction cup to access and rotate the filter from within the compartment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If LED lamps are used in interior illumination assemblies, then energy efficiency and longevity are improved, but light level consistency deteriorates due to aging and replacement of LEDs
Solution Approach 1:
The patent applies parameter changes by introducing a dimmer control mechanism that adjusts the electrical parameters (current/voltage) supplied to the LEDs. This allows the light output of individual LED assemblies to be modified to compensate for aging effects and manufacturing variations, thereby maintaining consistent overall illumination levels across multiple assemblies over time.
2Illumination intensity
If polarizing filters are used to control light intensity, then light emission adjustment is improved, but device complexity increases due to filter assembly requirements
Solution Approach 1:
The patent segments the polarizing filter system into two separate filters positioned at different orientations within the light path. This segmentation allows each filter to be independently adjusted or replaced without affecting the other, simplifying the overall assembly process while maintaining the ability to control light intensity through their combined polarizing effect.
Solution Approach 2:
The patent introduces a rotatable component that dynamically adjusts the orientation of one or more polarizing filters relative to the light source. This dynamic adjustment mechanism allows operators to vary the light emission intensity by rotating the filter assembly to different angular positions, providing continuous control without requiring complex electronic dimming circuits.
3Illumination intensity
If the entire lamp module is rotated to adjust polarizing filters, then light intensity control is achieved, but ease of operation deteriorates due to mounting constraints
Solution Approach 1:
The patent separates the polarizing filter assembly from the main lamp housing, creating an independently adjustable filter module. This segmentation allows the filter to be rotated and adjusted without moving the entire mounted lamp assembly, making it accessible for operation from within the compartment while the lamp remains securely mounted on the ceiling or wall.
Solution Approach 2:
The patent introduces an intermediary mechanical structure (such as a rotatable ring or adjustment mechanism) that couples the operator's rotational input to the polarizing filter while isolating the filter assembly from the fixed mounting structure. This intermediary mechanism enables easy adjustment of light intensity by simply rotating the external control element without disturbing the lamp's mounted position.
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 solution enables equalization of light levels between multiple illumination assemblies, enhancing light control and reducing the need for frequent replacements, while ensuring safety and compliance with elevator codes through improved light distribution and emergency power supply.
Implementation Method 1
at least one assembly of which comprises an LED dimmer configured to be accessible from within the compartment to adjust the amount of light emitted by the assembly into the compartment... rotating one of the two polarizing filters relative to the other filter
Data Source
AI summary
A method is provided for equalizing emitted light levels between light fixtures that use LEDs to produce light. The method includes gaining access to LED light fixtures from within a compartment in which the fixtures are mounted, and adjusting LED dimmers of the LED light fixtures to adjust the light emission levels of the LED light fixtures to generally match one another.