Diode Lamp Assembly Simulating Low Resistance for Aircraft Cabin Lighting
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Solution Overview
Problem
Existing filament-based reading lamps in aircraft consume high power and have shorter lifespans, leading to increased fuel usage and operating costs, and existing LED solutions do not effectively simulate low resistance to avoid false bulb replacement signals in incandescent lamp sockets.
Innovation Solution
A light-emitting diode lamp assembly with a first current path comprising a diode and a load resistor, and a second current path with a low resistance resistor, simulating low resistance to match incandescent lamps and prevent false replacement signals, while consuming less power and lasting significantly longer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If LED lamps are used to replace filament lamps, then power consumption is reduced and lamp life is extended, but resistance detection becomes inaccurate causing false replacement signals
Solution Approach 1:
A monitoring circuit is introduced as an intermediary component between the LED lamp and the resistance detection system. This circuit includes a current source connected in parallel with the LED lamp and a switching mechanism that alternates between connecting the current source to the LED lamp and connecting a known resistance to the detection system, thereby mediating the detection process to prevent false signals.
Solution Approach 2:
The monitoring system dynamically changes resistance parameters by switching between different resistance configurations. The circuit alternates between presenting the LED lamp's resistance and a known reference resistance to the detection system, allowing accurate monitoring by comparing resistance values at different states rather than relying on a single static measurement.
2Illumination intensity
If filament lamps are used in aircraft, then illumination is provided, but power consumption is high increasing fuel usage
Solution Approach 1:
The patent replaces the traditional filament-based incandescent lighting system with an LED-based lighting system. This substitution transitions from a thermal radiation mechanism (filament heating) to an electroluminescence mechanism (LED light emission), significantly reducing power consumption while maintaining or improving illumination quality in aircraft cabin applications.
3Duration of action of stationary object
If LED lamps replace filament lamps, then lamp life is extended, but compatibility with existing sockets and monitoring systems is compromised
Solution Approach 1:
The monitoring circuit is designed with multi-functionality to handle both traditional filament lamps and modern LED lamps. By incorporating a switching mechanism that can present different resistance configurations to the detection system, the circuit ensures universal compatibility with existing aircraft socket infrastructure and monitoring systems, regardless of the lamp type installed.
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
The diode lamp assembly reduces power consumption by up to 97% and extends lifespan by 25 times, while maintaining effective illuminance and avoiding false replacement signals, thus cutting fuel usage and operating costs.
Implementation Method 1
When charge carriers fall into lower energy levels, energy is released in the form of photons (light), thereby emitting light as a light-emitting diode or LED.
Data Source
AI summary
An LED-based lamp assembly or diode lamp assembly effectively replaces a filament or incandescent type lamp assembly for cabin/compartment reading light applications for reducing power consumption and improving fuel efficiency. The diode lamp assembly comprises a light-emitting diode in circuit with peripheral components for effecting or simulating a low resistance through the diode lamp assembly. The simulation of a low resistance via the diode lamp assembly appears the same as the normal operation of a filament lamp assembly to existent circuit polling mechanisms so that the latter need not be replaced. Rather, the targeted element to be replaced is a relatively high power consumption filament lamp. A lamp monitoring method is further disclosed as bootstrap-supported by the teaching of the diode lamp assembly.