Emergency Lamp Interface Using Invisible Wavelength Data Transmission
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Solution Overview
Problem
Existing methods for transmitting lamp parameters in emergency lights are prone to errors when relying on human observation of flashing signals, can disturb others, and may alter perceived brightness, failing to maintain desired lighting levels.
Innovation Solution
Transmitting lamp parameters in the invisible wavelength range during the lighting state using pulse-width modulation, allowing for error-free data transfer without altering perceived brightness, using a protocol that modulates light to encode parameters without interfering with the lighting state's brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If lamp parameters are transmitted using visible flashing signals, then data can be read by human observation, but the method is error-prone and can disturb third parties
Solution Approach 1:
The patent extracts the data transmission function from the visible light function by using invisible ultraviolet light for parameter transmission while maintaining visible light for illumination. This separation allows error-free automated reading without human observation errors and eliminates disturbance to third parties since the flashing signals are invisible.
Solution Approach 2:
The patent introduces a reading device as an intermediary between the lamp and the user. Instead of direct human observation of flashing signals, the reading device automatically detects and decodes the ultraviolet modulated signals, eliminating human error and providing accurate parameter retrieval without visual disturbance.
2Loss of information
If a second modulated signal for information transmission is added to the first lighting signal, then data can be transmitted with the light, but the luminous flux becomes greater than necessary for lighting purposes
Solution Approach 1:
The patent transitions from using visible light for both illumination and data transmission to using ultraviolet light for data transmission. By changing the wavelength dimension, the data transmission signal becomes invisible to humans, allowing information to be encoded in the ultraviolet range without increasing perceived luminous flux or energy consumption for lighting purposes.
3Loss of information
If the lamp is dimmed with PWM to transmit information, then data can be transmitted during pulse pauses, but the maximum duty cycle is limited to 50%
Solution Approach 1:
The patent extracts the data transmission function from the visible PWM dimming function by implementing it in the ultraviolet range. This allows independent modulation of ultraviolet light for data transmission without limiting the visible light duty cycle, enabling duty cycles greater than 50% while maintaining full lighting performance.
4Loss of information
If lamp parameters are transmitted in the visible wavelength range, then the transmission can be perceived by humans, but the perceived brightness changes and disturbs others
Solution Approach 1:
The patent uses ultraviolet wavelength range for parameter transmission, which is invisible to the human eye. This dimensional change in wavelength allows complete separation between illumination (visible light) and data transmission (ultraviolet), eliminating any change in perceived brightness while maintaining full parameter transmission capability.
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 reliable, error-free transmission of lamp parameters without disturbing humans or altering perceived brightness, allowing for higher duty cycles and maintaining desired lighting levels.
Implementation Method 1
Transmitting lamp parameters in the invisible wavelength range during the lighting state using pulse-width modulation, allowing for error-free data transfer without altering perceived brightness
Data Source
Figure 1
Figure 2a~2c
Figure 3a~3b
AI summary
The invention relates to a method for providing luminaire parameters at an interface of an emergency or safety luminaire, wherein the emergency or safety luminaire - in an illumination state for the purpose of illumination, produces light visible to the human eye and - in a non-illumination state, produces no light visible to the human eye or no light at all. Furthermore, the invention relates to an electronic circuit for a luminaire, luminaires with an interface for reading out luminaire parameters, and a device for reading out the luminaire parameters.